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-rw-r--r--src/byte_source.c98
-rw-r--r--src/env.c238
-rw-r--r--src/n3.c1503
-rw-r--r--src/node.c387
-rw-r--r--src/reader.c399
-rw-r--r--src/reader.h86
-rw-r--r--src/serd_internal.h625
-rw-r--r--src/serdi.c307
-rw-r--r--src/string.c204
-rw-r--r--src/uri.c510
-rw-r--r--src/writer.c994
11 files changed, 5351 insertions, 0 deletions
diff --git a/src/byte_source.c b/src/byte_source.c
new file mode 100644
index 00000000..1a67157b
--- /dev/null
+++ b/src/byte_source.c
@@ -0,0 +1,98 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+SerdStatus
+serd_byte_source_page(SerdByteSource* source)
+{
+ source->read_head = 0;
+ const size_t n_read = source->read_func(
+ source->file_buf, 1, source->page_size, source->stream);
+ if (n_read == 0) {
+ source->file_buf[0] = '\0';
+ source->eof = true;
+ return (source->error_func(source->stream)
+ ? SERD_ERR_UNKNOWN : SERD_FAILURE);
+ } else if (n_read < source->page_size) {
+ source->file_buf[n_read] = '\0';
+ }
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_byte_source_open_source(SerdByteSource* source,
+ SerdSource read_func,
+ SerdStreamErrorFunc error_func,
+ void* stream,
+ const uint8_t* name,
+ size_t page_size)
+{
+ const Cursor cur = { name, 1, 1 };
+
+ memset(source, '\0', sizeof(*source));
+ source->stream = stream;
+ source->from_stream = true;
+ source->page_size = page_size;
+ source->cur = cur;
+ source->error_func = error_func;
+ source->read_func = read_func;
+
+ if (page_size > 1) {
+ source->file_buf = (uint8_t*)serd_bufalloc(page_size);
+ source->read_buf = source->file_buf;
+ memset(source->file_buf, '\0', page_size);
+ } else {
+ source->read_buf = &source->read_byte;
+ }
+
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_byte_source_prepare(SerdByteSource* source)
+{
+ source->prepared = true;
+ if (source->from_stream) {
+ if (source->page_size > 1) {
+ return serd_byte_source_page(source);
+ } else if (source->from_stream) {
+ return serd_byte_source_advance(source);
+ }
+ }
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_byte_source_open_string(SerdByteSource* source, const uint8_t* utf8)
+{
+ const Cursor cur = { (const uint8_t*)"(string)", 1, 1 };
+
+ memset(source, '\0', sizeof(*source));
+ source->cur = cur;
+ source->read_buf = utf8;
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_byte_source_close(SerdByteSource* source)
+{
+ if (source->page_size > 1) {
+ free(source->file_buf);
+ }
+ memset(source, '\0', sizeof(*source));
+ return SERD_SUCCESS;
+}
diff --git a/src/env.c b/src/env.c
new file mode 100644
index 00000000..b26c6b20
--- /dev/null
+++ b/src/env.c
@@ -0,0 +1,238 @@
+/*
+ Copyright 2011-2016 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct {
+ SerdNode name;
+ SerdNode uri;
+} SerdPrefix;
+
+struct SerdEnvImpl {
+ SerdPrefix* prefixes;
+ size_t n_prefixes;
+ SerdNode base_uri_node;
+ SerdURI base_uri;
+};
+
+SerdEnv*
+serd_env_new(const SerdNode* base_uri)
+{
+ SerdEnv* env = (SerdEnv*)calloc(1, sizeof(struct SerdEnvImpl));
+ if (env && base_uri) {
+ serd_env_set_base_uri(env, base_uri);
+ }
+ return env;
+}
+
+void
+serd_env_free(SerdEnv* env)
+{
+ for (size_t i = 0; i < env->n_prefixes; ++i) {
+ serd_node_free(&env->prefixes[i].name);
+ serd_node_free(&env->prefixes[i].uri);
+ }
+ free(env->prefixes);
+ serd_node_free(&env->base_uri_node);
+ free(env);
+}
+
+const SerdNode*
+serd_env_get_base_uri(const SerdEnv* env,
+ SerdURI* out)
+{
+ if (out) {
+ *out = env->base_uri;
+ }
+ return &env->base_uri_node;
+}
+
+SerdStatus
+serd_env_set_base_uri(SerdEnv* env,
+ const SerdNode* uri)
+{
+ if (!env || !uri) {
+ return SERD_ERR_BAD_ARG;
+ }
+
+ // Resolve base URI and create a new node and URI for it
+ SerdURI base_uri;
+ SerdNode base_uri_node = serd_node_new_uri_from_node(
+ uri, &env->base_uri, &base_uri);
+
+ if (base_uri_node.buf) {
+ // Replace the current base URI
+ serd_node_free(&env->base_uri_node);
+ env->base_uri_node = base_uri_node;
+ env->base_uri = base_uri;
+ return SERD_SUCCESS;
+ }
+ return SERD_ERR_BAD_ARG;
+}
+
+static inline SerdPrefix*
+serd_env_find(const SerdEnv* env,
+ const uint8_t* name,
+ size_t name_len)
+{
+ for (size_t i = 0; i < env->n_prefixes; ++i) {
+ const SerdNode* const prefix_name = &env->prefixes[i].name;
+ if (prefix_name->n_bytes == name_len) {
+ if (!memcmp(prefix_name->buf, name, name_len)) {
+ return &env->prefixes[i];
+ }
+ }
+ }
+ return NULL;
+}
+
+static void
+serd_env_add(SerdEnv* env,
+ const SerdNode* name,
+ const SerdNode* uri)
+{
+ SerdPrefix* const prefix = serd_env_find(env, name->buf, name->n_bytes);
+ if (prefix) {
+ SerdNode old_prefix_uri = prefix->uri;
+ prefix->uri = serd_node_copy(uri);
+ serd_node_free(&old_prefix_uri);
+ } else {
+ env->prefixes = (SerdPrefix*)realloc(
+ env->prefixes, (++env->n_prefixes) * sizeof(SerdPrefix));
+ env->prefixes[env->n_prefixes - 1].name = serd_node_copy(name);
+ env->prefixes[env->n_prefixes - 1].uri = serd_node_copy(uri);
+ }
+}
+
+SerdStatus
+serd_env_set_prefix(SerdEnv* env,
+ const SerdNode* name,
+ const SerdNode* uri)
+{
+ if (!name->buf || uri->type != SERD_URI) {
+ return SERD_ERR_BAD_ARG;
+ } else if (serd_uri_string_has_scheme(uri->buf)) {
+ // Set prefix to absolute URI
+ serd_env_add(env, name, uri);
+ } else {
+ // Resolve relative URI and create a new node and URI for it
+ SerdURI abs_uri;
+ SerdNode abs_uri_node = serd_node_new_uri_from_node(
+ uri, &env->base_uri, &abs_uri);
+
+ // Set prefix to resolved (absolute) URI
+ serd_env_add(env, name, &abs_uri_node);
+ serd_node_free(&abs_uri_node);
+ }
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_env_set_prefix_from_strings(SerdEnv* env,
+ const uint8_t* name,
+ const uint8_t* uri)
+{
+ const SerdNode name_node = serd_node_from_string(SERD_LITERAL, name);
+ const SerdNode uri_node = serd_node_from_string(SERD_URI, uri);
+
+ return serd_env_set_prefix(env, &name_node, &uri_node);
+}
+
+bool
+serd_env_qualify(const SerdEnv* env,
+ const SerdNode* uri,
+ SerdNode* prefix,
+ SerdChunk* suffix)
+{
+ for (size_t i = 0; i < env->n_prefixes; ++i) {
+ const SerdNode* const prefix_uri = &env->prefixes[i].uri;
+ if (uri->n_bytes >= prefix_uri->n_bytes) {
+ if (!strncmp((const char*)uri->buf,
+ (const char*)prefix_uri->buf,
+ prefix_uri->n_bytes)) {
+ *prefix = env->prefixes[i].name;
+ suffix->buf = uri->buf + prefix_uri->n_bytes;
+ suffix->len = uri->n_bytes - prefix_uri->n_bytes;
+ return true;
+ }
+ }
+ }
+ return false;
+}
+
+SerdStatus
+serd_env_expand(const SerdEnv* env,
+ const SerdNode* curie,
+ SerdChunk* uri_prefix,
+ SerdChunk* uri_suffix)
+{
+ const uint8_t* const colon = (const uint8_t*)memchr(
+ curie->buf, ':', curie->n_bytes + 1);
+ if (curie->type != SERD_CURIE || !colon) {
+ return SERD_ERR_BAD_ARG;
+ }
+
+ const size_t name_len = colon - curie->buf;
+ const SerdPrefix* const prefix = serd_env_find(env, curie->buf, name_len);
+ if (prefix) {
+ uri_prefix->buf = prefix->uri.buf;
+ uri_prefix->len = prefix->uri.n_bytes;
+ uri_suffix->buf = colon + 1;
+ uri_suffix->len = curie->n_bytes - (colon - curie->buf) - 1;
+ return SERD_SUCCESS;
+ }
+ return SERD_ERR_BAD_CURIE;
+}
+
+SerdNode
+serd_env_expand_node(const SerdEnv* env,
+ const SerdNode* node)
+{
+ switch (node->type) {
+ case SERD_CURIE: {
+ SerdChunk prefix;
+ SerdChunk suffix;
+ if (serd_env_expand(env, node, &prefix, &suffix)) {
+ return SERD_NODE_NULL;
+ }
+ const size_t len = prefix.len + suffix.len;
+ uint8_t* buf = (uint8_t*)malloc(len + 1);
+ SerdNode ret = { buf, len, 0, 0, SERD_URI };
+ snprintf((char*)buf, len + 1, "%s%s", prefix.buf, suffix.buf);
+ ret.n_chars = serd_strlen(buf, NULL, NULL);
+ return ret;
+ }
+ case SERD_URI: {
+ SerdURI ignored;
+ return serd_node_new_uri_from_node(node, &env->base_uri, &ignored);
+ }
+ default:
+ return SERD_NODE_NULL;
+ }
+}
+
+void
+serd_env_foreach(const SerdEnv* env,
+ SerdPrefixSink func,
+ void* handle)
+{
+ for (size_t i = 0; i < env->n_prefixes; ++i) {
+ func(handle, &env->prefixes[i].name, &env->prefixes[i].uri);
+ }
+}
diff --git a/src/n3.c b/src/n3.c
new file mode 100644
index 00000000..37fe995e
--- /dev/null
+++ b/src/n3.c
@@ -0,0 +1,1503 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "reader.h"
+
+#define TRY_THROW(exp) if (!(exp)) goto except;
+#define TRY_RET(exp) if (!(exp)) return 0;
+
+static inline bool
+fancy_syntax(const SerdReader* reader)
+{
+ return reader->syntax == SERD_TURTLE || reader->syntax == SERD_TRIG;
+}
+
+static bool
+read_collection(SerdReader* reader, ReadContext ctx, Ref* dest);
+
+static bool
+read_predicateObjectList(SerdReader* reader, ReadContext ctx, bool* ate_dot);
+
+static inline uint8_t
+read_HEX(SerdReader* reader)
+{
+ const uint8_t c = peek_byte(reader);
+ if (is_xdigit(c)) {
+ return eat_byte_safe(reader, c);
+ }
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid hexadecimal digit `%c'\n", c);
+}
+
+// Read UCHAR escape, initial \ is already eaten by caller
+static inline bool
+read_UCHAR(SerdReader* reader, Ref dest, uint32_t* char_code)
+{
+ const uint8_t b = peek_byte(reader);
+ unsigned length = 0;
+ switch (b) {
+ case 'U':
+ length = 8;
+ break;
+ case 'u':
+ length = 4;
+ break;
+ default:
+ return false;
+ }
+ eat_byte_safe(reader, b);
+
+ uint8_t buf[9] = { 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ for (unsigned i = 0; i < length; ++i) {
+ if (!(buf[i] = read_HEX(reader))) {
+ return false;
+ }
+ }
+
+ char* endptr = NULL;
+ const uint32_t code = strtoul((const char*)buf, &endptr, 16);
+ assert(endptr == (char*)buf + length);
+
+ unsigned size = 0;
+ if (code < 0x00000080) {
+ size = 1;
+ } else if (code < 0x00000800) {
+ size = 2;
+ } else if (code < 0x00010000) {
+ size = 3;
+ } else if (code < 0x00110000) {
+ size = 4;
+ } else {
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "unicode character 0x%X out of range\n", code);
+ push_bytes(reader, dest, replacement_char, 3);
+ *char_code = 0xFFFD;
+ return true;
+ }
+
+ // Build output in buf
+ // (Note # of bytes = # of leading 1 bits in first byte)
+ uint32_t c = code;
+ switch (size) {
+ case 4:
+ buf[3] = 0x80 | (uint8_t)(c & 0x3F);
+ c >>= 6;
+ c |= (16 << 12); // set bit 4
+ // fallthru
+ case 3:
+ buf[2] = 0x80 | (uint8_t)(c & 0x3F);
+ c >>= 6;
+ c |= (32 << 6); // set bit 5
+ // fallthru
+ case 2:
+ buf[1] = 0x80 | (uint8_t)(c & 0x3F);
+ c >>= 6;
+ c |= 0xC0; // set bits 6 and 7
+ // fallthru
+ case 1:
+ buf[0] = (uint8_t)c;
+ }
+
+ push_bytes(reader, dest, buf, size);
+ *char_code = code;
+ return true;
+}
+
+// Read ECHAR escape, initial \ is already eaten by caller
+static inline bool
+read_ECHAR(SerdReader* reader, Ref dest, SerdNodeFlags* flags)
+{
+ const uint8_t c = peek_byte(reader);
+ switch (c) {
+ case 't':
+ eat_byte_safe(reader, 't');
+ push_byte(reader, dest, '\t');
+ return true;
+ case 'b':
+ eat_byte_safe(reader, 'b');
+ push_byte(reader, dest, '\b');
+ return true;
+ case 'n':
+ *flags |= SERD_HAS_NEWLINE;
+ eat_byte_safe(reader, 'n');
+ push_byte(reader, dest, '\n');
+ return true;
+ case 'r':
+ *flags |= SERD_HAS_NEWLINE;
+ eat_byte_safe(reader, 'r');
+ push_byte(reader, dest, '\r');
+ return true;
+ case 'f':
+ eat_byte_safe(reader, 'f');
+ push_byte(reader, dest, '\f');
+ return true;
+ case '\\': case '"': case '\'':
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline SerdStatus
+bad_char(SerdReader* reader, const char* fmt, uint8_t c)
+{
+ // Skip bytes until the next start byte
+ for (uint8_t b = peek_byte(reader); (b & 0x80);) {
+ eat_byte_safe(reader, b);
+ b = peek_byte(reader);
+ }
+
+ r_err(reader, SERD_ERR_BAD_SYNTAX, fmt, c);
+ return reader->strict ? SERD_ERR_BAD_SYNTAX : SERD_FAILURE;
+}
+
+static SerdStatus
+read_utf8_bytes(SerdReader* reader, uint8_t bytes[4], uint32_t* size, uint8_t c)
+{
+ *size = utf8_num_bytes(c);
+ if (*size <= 1 || *size > 4) {
+ return bad_char(reader, "invalid UTF-8 start 0x%X\n", c);
+ }
+
+ bytes[0] = c;
+ for (unsigned i = 1; i < *size; ++i) {
+ if (((bytes[i] = peek_byte(reader)) & 0x80) == 0) {
+ return bad_char(reader, "invalid UTF-8 continuation 0x%X\n",
+ bytes[i]);
+ }
+ eat_byte_safe(reader, bytes[i]);
+ }
+
+ return SERD_SUCCESS;
+}
+
+static SerdStatus
+read_utf8_character(SerdReader* reader, Ref dest, uint8_t c)
+{
+ uint32_t size;
+ uint8_t bytes[4];
+ SerdStatus st = read_utf8_bytes(reader, bytes, &size, c);
+ if (st) {
+ push_bytes(reader, dest, replacement_char, 3);
+ } else {
+ push_bytes(reader, dest, bytes, size);
+ }
+ return st;
+}
+
+static SerdStatus
+read_utf8_code(SerdReader* reader, Ref dest, uint32_t* code, uint8_t c)
+{
+ uint32_t size;
+ uint8_t bytes[4];
+ SerdStatus st = read_utf8_bytes(reader, bytes, &size, c);
+ if (st) {
+ push_bytes(reader, dest, replacement_char, 3);
+ return st;
+ }
+
+ push_bytes(reader, dest, bytes, size);
+ *code = parse_counted_utf8_char(bytes, size);
+ return st;
+}
+
+// Read one character (possibly multi-byte)
+// The first byte, c, has already been eaten by caller
+static inline SerdStatus
+read_character(SerdReader* reader, Ref dest, SerdNodeFlags* flags, uint8_t c)
+{
+ if (!(c & 0x80)) {
+ switch (c) {
+ case 0xA: case 0xD:
+ *flags |= SERD_HAS_NEWLINE;
+ break;
+ case '"': case '\'':
+ *flags |= SERD_HAS_QUOTE;
+ break;
+ }
+ push_byte(reader, dest, c);
+ return SERD_SUCCESS;
+ }
+ return read_utf8_character(reader, dest, c);
+}
+
+// [10] comment ::= '#' ( [^#xA #xD] )*
+static void
+read_comment(SerdReader* reader)
+{
+ eat_byte_safe(reader, '#');
+ uint8_t c;
+ while (((c = peek_byte(reader)) != 0xA) && (c != 0xD) && c) {
+ eat_byte_safe(reader, c);
+ }
+}
+
+// [24] ws ::= #x9 | #xA | #xD | #x20 | comment
+static inline bool
+read_ws(SerdReader* reader)
+{
+ const uint8_t c = peek_byte(reader);
+ switch (c) {
+ case 0x9: case 0xA: case 0xD: case 0x20:
+ eat_byte_safe(reader, c);
+ return true;
+ case '#':
+ read_comment(reader);
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool
+read_ws_star(SerdReader* reader)
+{
+ while (read_ws(reader)) {}
+ return true;
+}
+
+static inline bool
+peek_delim(SerdReader* reader, const char delim)
+{
+ read_ws_star(reader);
+ return peek_byte(reader) == delim;
+}
+
+static inline bool
+eat_delim(SerdReader* reader, const char delim)
+{
+ if (peek_delim(reader, delim)) {
+ eat_byte_safe(reader, delim);
+ return read_ws_star(reader);
+ }
+ return false;
+}
+
+// STRING_LITERAL_LONG_QUOTE and STRING_LITERAL_LONG_SINGLE_QUOTE
+// Initial triple quotes are already eaten by caller
+static Ref
+read_STRING_LITERAL_LONG(SerdReader* reader, SerdNodeFlags* flags, uint8_t q)
+{
+ Ref ref = push_node(reader, SERD_LITERAL, "", 0);
+ while (!reader->status) {
+ const uint8_t c = peek_byte(reader);
+ uint32_t code;
+ switch (c) {
+ case '\\':
+ eat_byte_safe(reader, c);
+ if (!read_ECHAR(reader, ref, flags) &&
+ !read_UCHAR(reader, ref, &code)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid escape `\\%c'\n", peek_byte(reader));
+ return pop_node(reader, ref);
+ }
+ break;
+ default:
+ if (c == q) {
+ eat_byte_safe(reader, q);
+ const uint8_t q2 = eat_byte_safe(reader, peek_byte(reader));
+ const uint8_t q3 = peek_byte(reader);
+ if (q2 == q && q3 == q) { // End of string
+ eat_byte_safe(reader, q3);
+ return ref;
+ }
+ *flags |= SERD_HAS_QUOTE;
+ push_byte(reader, ref, c);
+ read_character(reader, ref, flags, q2);
+ } else {
+ read_character(reader, ref, flags, eat_byte_safe(reader, c));
+ }
+ }
+ }
+ return ref;
+}
+
+// STRING_LITERAL_QUOTE and STRING_LITERAL_SINGLE_QUOTE
+// Initial quote is already eaten by caller
+static Ref
+read_STRING_LITERAL(SerdReader* reader, SerdNodeFlags* flags, uint8_t q)
+{
+ Ref ref = push_node(reader, SERD_LITERAL, "", 0);
+ while (!reader->status) {
+ const uint8_t c = peek_byte(reader);
+ uint32_t code = 0;
+ switch (c) {
+ case '\n': case '\r':
+ r_err(reader, SERD_ERR_BAD_SYNTAX, "line end in short string\n");
+ return pop_node(reader, ref);
+ case '\\':
+ eat_byte_safe(reader, c);
+ if (!read_ECHAR(reader, ref, flags) &&
+ !read_UCHAR(reader, ref, &code)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid escape `\\%c'\n", peek_byte(reader));
+ return pop_node(reader, ref);
+ }
+ break;
+ default:
+ if (c == q) {
+ eat_byte_check(reader, q);
+ return ref;
+ } else {
+ read_character(reader, ref, flags, eat_byte_safe(reader, c));
+ }
+ }
+ }
+ eat_byte_check(reader, q);
+ return ref;
+}
+
+static Ref
+read_String(SerdReader* reader, SerdNodeFlags* flags)
+{
+ const uint8_t q1 = peek_byte(reader);
+ eat_byte_safe(reader, q1);
+
+ const uint8_t q2 = peek_byte(reader);
+ if (q2 != q1) { // Short string (not triple quoted)
+ return read_STRING_LITERAL(reader, flags, q1);
+ }
+
+ eat_byte_safe(reader, q2);
+ const uint8_t q3 = peek_byte(reader);
+ if (q3 != q1) { // Empty short string ("" or '')
+ return push_node(reader, SERD_LITERAL, "", 0);
+ }
+
+ if (!fancy_syntax(reader)) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "syntax does not support long literals\n");
+ }
+
+ eat_byte_safe(reader, q3);
+ return read_STRING_LITERAL_LONG(reader, flags, q1);
+}
+
+static inline bool
+is_PN_CHARS_BASE(const uint32_t c)
+{
+ return ((c >= 0x00C0 && c <= 0x00D6) || (c >= 0x00D8 && c <= 0x00F6) ||
+ (c >= 0x00F8 && c <= 0x02FF) || (c >= 0x0370 && c <= 0x037D) ||
+ (c >= 0x037F && c <= 0x1FFF) || (c >= 0x200C && c <= 0x200D) ||
+ (c >= 0x2070 && c <= 0x218F) || (c >= 0x2C00 && c <= 0x2FEF) ||
+ (c >= 0x3001 && c <= 0xD7FF) || (c >= 0xF900 && c <= 0xFDCF) ||
+ (c >= 0xFDF0 && c <= 0xFFFD) || (c >= 0x10000 && c <= 0xEFFFF));
+}
+
+static SerdStatus
+read_PN_CHARS_BASE(SerdReader* reader, Ref dest)
+{
+ uint32_t code;
+ const uint8_t c = peek_byte(reader);
+ SerdStatus st = SERD_SUCCESS;
+ if (is_alpha(c)) {
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ } else if (!(c & 0x80)) {
+ return SERD_FAILURE;
+ } else if ((st = read_utf8_code(reader, dest, &code,
+ eat_byte_safe(reader, c)))) {
+ return st;
+ } else if (!is_PN_CHARS_BASE(code)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid character U+%04X in name\n", code);
+ if (reader->strict) {
+ return SERD_ERR_BAD_SYNTAX;
+ }
+ }
+ return st;
+}
+
+static inline bool
+is_PN_CHARS(const uint32_t c)
+{
+ return (is_PN_CHARS_BASE(c) || c == 0xB7 ||
+ (c >= 0x0300 && c <= 0x036F) || (c >= 0x203F && c <= 0x2040));
+}
+
+static SerdStatus
+read_PN_CHARS(SerdReader* reader, Ref dest)
+{
+ uint32_t code;
+ const uint8_t c = peek_byte(reader);
+ SerdStatus st = SERD_SUCCESS;
+ if (is_alpha(c) || is_digit(c) || c == '_' || c == '-') {
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ } else if (!(c & 0x80)) {
+ return SERD_FAILURE;
+ } else if ((st = read_utf8_code(reader, dest, &code,
+ eat_byte_safe(reader, c)))) {
+ return st;
+ } else if (!is_PN_CHARS(code)) {
+ r_err(reader, (st = SERD_ERR_BAD_SYNTAX),
+ "invalid character U+%04X in name\n", code);
+ }
+ return st;
+}
+
+static bool
+read_PERCENT(SerdReader* reader, Ref dest)
+{
+ push_byte(reader, dest, eat_byte_safe(reader, '%'));
+ const uint8_t h1 = read_HEX(reader);
+ const uint8_t h2 = read_HEX(reader);
+ if (h1 && h2) {
+ push_byte(reader, dest, h1);
+ push_byte(reader, dest, h2);
+ return true;
+ }
+ return false;
+}
+
+static SerdStatus
+read_PLX(SerdReader* reader, Ref dest)
+{
+ uint8_t c = peek_byte(reader);
+ switch (c) {
+ case '%':
+ if (!read_PERCENT(reader, dest)) {
+ return SERD_ERR_BAD_SYNTAX;
+ }
+ return SERD_SUCCESS;
+ case '\\':
+ eat_byte_safe(reader, c);
+ if (is_alpha(c = peek_byte(reader))) {
+ // Escapes like \u \n etc. are not supported
+ return SERD_ERR_BAD_SYNTAX;
+ }
+ // Allow escaping of pretty much any other character
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ return SERD_SUCCESS;
+ default:
+ return SERD_FAILURE;
+ }
+}
+
+static SerdStatus
+read_PN_LOCAL(SerdReader* reader, Ref dest, bool* ate_dot)
+{
+ uint8_t c = peek_byte(reader);
+ SerdStatus st = SERD_SUCCESS;
+ bool trailing_unescaped_dot = false;
+ switch (c) {
+ case '0': case '1': case '2': case '3': case '4': case '5':
+ case '6': case '7': case '8': case '9': case ':': case '_':
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ break;
+ default:
+ if ((st = read_PLX(reader, dest)) > SERD_FAILURE) {
+ return st;
+ } else if (st != SERD_SUCCESS && read_PN_CHARS_BASE(reader, dest)) {
+ return SERD_FAILURE;
+ }
+ }
+
+ while ((c = peek_byte(reader))) { // Middle: (PN_CHARS | '.' | ':')*
+ if (c == '.' || c == ':') {
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ } else if ((st = read_PLX(reader, dest)) > SERD_FAILURE) {
+ return st;
+ } else if (st != SERD_SUCCESS && (st = read_PN_CHARS(reader, dest))) {
+ break;
+ }
+ trailing_unescaped_dot = (c == '.');
+ }
+
+ SerdNode* const n = deref(reader, dest);
+ if (trailing_unescaped_dot) {
+ // Ate trailing dot, pop it from stack/node and inform caller
+ --n->n_bytes;
+ serd_stack_pop(&reader->stack, 1);
+ *ate_dot = true;
+ }
+
+ return (st > SERD_FAILURE) ? st : SERD_SUCCESS;
+}
+
+// Read the remainder of a PN_PREFIX after some initial characters
+static SerdStatus
+read_PN_PREFIX_tail(SerdReader* reader, Ref dest)
+{
+ uint8_t c;
+ while ((c = peek_byte(reader))) { // Middle: (PN_CHARS | '.')*
+ if (c == '.') {
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ } else if (read_PN_CHARS(reader, dest)) {
+ break;
+ }
+ }
+
+ const SerdNode* const n = deref(reader, dest);
+ if (n->buf[n->n_bytes - 1] == '.' && read_PN_CHARS(reader, dest)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX, "prefix ends with `.'\n");
+ return SERD_ERR_BAD_SYNTAX;
+ }
+
+ return SERD_SUCCESS;
+}
+
+static SerdStatus
+read_PN_PREFIX(SerdReader* reader, Ref dest)
+{
+ if (!read_PN_CHARS_BASE(reader, dest)) {
+ return read_PN_PREFIX_tail(reader, dest);
+ }
+ return SERD_FAILURE;
+}
+
+static Ref
+read_LANGTAG(SerdReader* reader)
+{
+ uint8_t c = peek_byte(reader);
+ if (!is_alpha(c)) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "unexpected `%c'\n", c);
+ }
+ Ref ref = push_node(reader, SERD_LITERAL, "", 0);
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ while ((c = peek_byte(reader)) && is_alpha(c)) {
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ }
+ while (peek_byte(reader) == '-') {
+ push_byte(reader, ref, eat_byte_safe(reader, '-'));
+ while ((c = peek_byte(reader)) && (is_alpha(c) || is_digit(c))) {
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ }
+ }
+ return ref;
+}
+
+static bool
+read_IRIREF_scheme(SerdReader* reader, Ref dest)
+{
+ uint8_t c = peek_byte(reader);
+ if (!isalpha(c)) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "bad IRI scheme start `%c'\n", c);
+ }
+
+ while ((c = peek_byte(reader))) {
+ if (c == '>') {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "missing IRI scheme\n");
+ } else if (!is_uri_scheme_char(c)) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "bad IRI scheme char `%X'\n", c);
+ }
+
+ push_byte(reader, dest, eat_byte_safe(reader, c));
+ if (c == ':') {
+ return true; // End of scheme
+ }
+ }
+
+ return false;
+}
+
+static Ref
+read_IRIREF(SerdReader* reader)
+{
+ TRY_RET(eat_byte_check(reader, '<'));
+ Ref ref = push_node(reader, SERD_URI, "", 0);
+ if (!fancy_syntax(reader) && !read_IRIREF_scheme(reader, ref)) {
+ return pop_node(reader, ref);
+ }
+
+ uint32_t code = 0;
+ while (!reader->status) {
+ const uint8_t c = eat_byte_safe(reader, peek_byte(reader));
+ switch (c) {
+ case '"': case '<': case '^': case '`': case '{': case '|': case '}':
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid IRI character `%c'\n", c);
+ return pop_node(reader, ref);
+ case '>':
+ return ref;
+ case '\\':
+ if (!read_UCHAR(reader, ref, &code)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX, "invalid IRI escape\n");
+ return pop_node(reader, ref);
+ }
+ switch (code) {
+ case 0: case ' ': case '<': case '>':
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid escaped IRI character %X %c\n", code, code);
+ return pop_node(reader, ref);
+ }
+ break;
+ default:
+ if (c <= 0x20) {
+ if (isprint(c)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid IRI character `%c' (escape %%%02X)\n", c, c);
+ } else {
+ r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid IRI character (escape %%%02X)\n", c, c);
+ }
+ if (reader->strict) {
+ return pop_node(reader, ref);
+ }
+ reader->status = SERD_FAILURE;
+ push_byte(reader, ref, c);
+ } else if (!(c & 0x80)) {
+ push_byte(reader, ref, c);
+ } else if (read_utf8_character(reader, ref, c)) {
+ if (reader->strict) {
+ return pop_node(reader, ref);
+ }
+ reader->status = SERD_FAILURE;
+ }
+ }
+ }
+ return pop_node(reader, ref);
+}
+
+static bool
+read_PrefixedName(SerdReader* reader, Ref dest, bool read_prefix, bool* ate_dot)
+{
+ if (read_prefix && read_PN_PREFIX(reader, dest) > SERD_FAILURE) {
+ return false;
+ } else if (peek_byte(reader) != ':') {
+ return false;
+ }
+
+ push_byte(reader, dest, eat_byte_safe(reader, ':'));
+ return read_PN_LOCAL(reader, dest, ate_dot) <= SERD_FAILURE;
+}
+
+static bool
+read_0_9(SerdReader* reader, Ref str, bool at_least_one)
+{
+ unsigned count = 0;
+ for (uint8_t c; is_digit((c = peek_byte(reader))); ++count) {
+ push_byte(reader, str, eat_byte_safe(reader, c));
+ }
+ if (at_least_one && count == 0) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX, "expected digit\n");
+ }
+ return count;
+}
+
+static bool
+read_number(SerdReader* reader, Ref* dest, Ref* datatype, bool* ate_dot)
+{
+ #define XSD_DECIMAL NS_XSD "decimal"
+ #define XSD_DOUBLE NS_XSD "double"
+ #define XSD_INTEGER NS_XSD "integer"
+ Ref ref = push_node(reader, SERD_LITERAL, "", 0);
+ uint8_t c = peek_byte(reader);
+ bool has_decimal = false;
+ if (c == '-' || c == '+') {
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ }
+ if ((c = peek_byte(reader)) == '.') {
+ has_decimal = true;
+ // decimal case 2 (e.g. '.0' or `-.0' or `+.0')
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ TRY_THROW(read_0_9(reader, ref, true));
+ } else {
+ // all other cases ::= ( '-' | '+' ) [0-9]+ ( . )? ( [0-9]+ )? ...
+ TRY_THROW(is_digit(c));
+ read_0_9(reader, ref, true);
+ if ((c = peek_byte(reader)) == '.') {
+ has_decimal = true;
+
+ // Annoyingly, dot can be end of statement, so tentatively eat
+ eat_byte_safe(reader, c);
+ c = peek_byte(reader);
+ if (!is_digit(c) && c != 'e' && c != 'E') {
+ *dest = ref;
+ *ate_dot = true; // Force caller to deal with stupid grammar
+ return true; // Next byte is not a number character, done
+ }
+
+ push_byte(reader, ref, '.');
+ read_0_9(reader, ref, false);
+ }
+ }
+ c = peek_byte(reader);
+ if (c == 'e' || c == 'E') {
+ // double
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ switch ((c = peek_byte(reader))) {
+ case '+': case '-':
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ default: break;
+ }
+ TRY_THROW(read_0_9(reader, ref, true));
+ *datatype = push_node(reader, SERD_URI,
+ XSD_DOUBLE, sizeof(XSD_DOUBLE) - 1);
+ } else if (has_decimal) {
+ *datatype = push_node(reader, SERD_URI,
+ XSD_DECIMAL, sizeof(XSD_DECIMAL) - 1);
+ } else {
+ *datatype = push_node(reader, SERD_URI,
+ XSD_INTEGER, sizeof(XSD_INTEGER) - 1);
+ }
+ *dest = ref;
+ return true;
+except:
+ pop_node(reader, *datatype);
+ pop_node(reader, ref);
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "bad number syntax\n");
+}
+
+static bool
+read_iri(SerdReader* reader, Ref* dest, bool* ate_dot)
+{
+ switch (peek_byte(reader)) {
+ case '<':
+ *dest = read_IRIREF(reader);
+ return true;
+ default:
+ *dest = push_node(reader, SERD_CURIE, "", 0);
+ return read_PrefixedName(reader, *dest, true, ate_dot);
+ }
+}
+
+static bool
+read_literal(SerdReader* reader, Ref* dest,
+ Ref* datatype, Ref* lang, SerdNodeFlags* flags, bool* ate_dot)
+{
+ Ref str = read_String(reader, flags);
+ if (!str) {
+ return false;
+ }
+
+ switch (peek_byte(reader)) {
+ case '@':
+ eat_byte_safe(reader, '@');
+ TRY_THROW(*lang = read_LANGTAG(reader));
+ break;
+ case '^':
+ eat_byte_safe(reader, '^');
+ eat_byte_check(reader, '^');
+ TRY_THROW(read_iri(reader, datatype, ate_dot));
+ break;
+ }
+ *dest = str;
+ return true;
+except:
+ *datatype = pop_node(reader, *datatype);
+ *lang = pop_node(reader, *lang);
+ pop_node(reader, str);
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "bad literal syntax\n");
+}
+
+inline static bool
+is_token_end(uint8_t c)
+{
+ switch (c) {
+ case 0x9: case 0xA: case 0xD: case 0x20: case '\0':
+ case '#': case '.': case ';': case '<':
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool
+read_verb(SerdReader* reader, Ref* dest)
+{
+ if (peek_byte(reader) == '<') {
+ return (*dest = read_IRIREF(reader));
+ }
+
+ /* Either a qname, or "a". Read the prefix first, and if it is in fact
+ "a", produce that instead.
+ */
+ *dest = push_node(reader, SERD_CURIE, "", 0);
+ const SerdStatus st = read_PN_PREFIX(reader, *dest);
+ bool ate_dot = false;
+ SerdNode* node = deref(reader, *dest);
+ if (!st && node->n_bytes == 1 && node->buf[0] == 'a' &&
+ is_token_end(peek_byte(reader))) {
+ pop_node(reader, *dest);
+ return (*dest = push_node(reader, SERD_URI, NS_RDF "type", 47));
+ } else if (st > SERD_FAILURE ||
+ !read_PrefixedName(reader, *dest, false, &ate_dot) ||
+ ate_dot) {
+ *dest = pop_node(reader, *dest);
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "bad verb\n");
+ }
+
+ return true;
+}
+
+static Ref
+read_BLANK_NODE_LABEL(SerdReader* reader, bool* ate_dot)
+{
+ eat_byte_safe(reader, '_');
+ eat_byte_check(reader, ':');
+ Ref ref = push_node(reader, SERD_BLANK,
+ reader->bprefix ? (char*)reader->bprefix : "",
+ reader->bprefix_len);
+
+ uint8_t c = peek_byte(reader); // First: (PN_CHARS | '_' | [0-9])
+ if (is_digit(c) || c == '_') {
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ } else if (read_PN_CHARS(reader, ref)) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX, "invalid name start character\n");
+ return pop_node(reader, ref);
+ }
+
+ while ((c = peek_byte(reader))) { // Middle: (PN_CHARS | '.')*
+ if (c == '.') {
+ push_byte(reader, ref, eat_byte_safe(reader, c));
+ } else if (read_PN_CHARS(reader, ref)) {
+ break;
+ }
+ }
+
+ SerdNode* n = deref(reader, ref);
+ if (n->buf[n->n_bytes - 1] == '.' && read_PN_CHARS(reader, ref)) {
+ // Ate trailing dot, pop it from stack/node and inform caller
+ --n->n_bytes;
+ serd_stack_pop(&reader->stack, 1);
+ *ate_dot = true;
+ }
+
+ if (fancy_syntax(reader)) {
+ if (is_digit(n->buf[reader->bprefix_len + 1])) {
+ if ((n->buf[reader->bprefix_len]) == 'b') {
+ ((char*)n->buf)[reader->bprefix_len] = 'B'; // Prevent clash
+ reader->seen_genid = true;
+ } else if (reader->seen_genid &&
+ n->buf[reader->bprefix_len] == 'B') {
+ r_err(reader, SERD_ERR_ID_CLASH,
+ "found both `b' and `B' blank IDs, prefix required\n");
+ return pop_node(reader, ref);
+ }
+ }
+ }
+ return ref;
+}
+
+static Ref
+read_blankName(SerdReader* reader)
+{
+ eat_byte_safe(reader, '=');
+ if (eat_byte_check(reader, '=') != '=') {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "expected `='\n");
+ }
+
+ Ref subject = 0;
+ bool ate_dot = false;
+ read_ws_star(reader);
+ read_iri(reader, &subject, &ate_dot);
+ return subject;
+}
+
+static bool
+read_anon(SerdReader* reader, ReadContext ctx, bool subject, Ref* dest)
+{
+ const SerdStatementFlags old_flags = *ctx.flags;
+ bool empty;
+ eat_byte_safe(reader, '[');
+ if ((empty = peek_delim(reader, ']'))) {
+ *ctx.flags |= (subject) ? SERD_EMPTY_S : SERD_EMPTY_O;
+ } else {
+ *ctx.flags |= (subject) ? SERD_ANON_S_BEGIN : SERD_ANON_O_BEGIN;
+ if (peek_delim(reader, '=')) {
+ if (!(*dest = read_blankName(reader)) ||
+ !eat_delim(reader, ';')) {
+ return false;
+ }
+ }
+ }
+
+ if (!*dest) {
+ *dest = blank_id(reader);
+ }
+ if (ctx.subject) {
+ TRY_RET(emit_statement(reader, ctx, *dest, 0, 0));
+ }
+
+ ctx.subject = *dest;
+ if (!empty) {
+ *ctx.flags &= ~(SERD_LIST_CONT);
+ if (!subject) {
+ *ctx.flags |= SERD_ANON_CONT;
+ }
+ bool ate_dot_in_list = false;
+ read_predicateObjectList(reader, ctx, &ate_dot_in_list);
+ if (ate_dot_in_list) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "`.' inside blank\n");
+ }
+ read_ws_star(reader);
+ if (reader->end_sink) {
+ reader->end_sink(reader->handle, deref(reader, *dest));
+ }
+ *ctx.flags = old_flags;
+ }
+ return (eat_byte_check(reader, ']') == ']');
+}
+
+/* If emit is true: recurses, calling statement_sink for every statement
+ encountered, and leaves stack in original calling state (i.e. pops
+ everything it pushes). */
+static bool
+read_object(SerdReader* reader, ReadContext* ctx, bool emit, bool* ate_dot)
+{
+ static const char* const XSD_BOOLEAN = NS_XSD "boolean";
+ static const size_t XSD_BOOLEAN_LEN = 40;
+
+#ifndef NDEBUG
+ const size_t orig_stack_size = reader->stack.size;
+#endif
+
+ bool ret = false;
+ bool simple = (ctx->subject != 0);
+ SerdNode* node = NULL;
+ Ref o = 0;
+ Ref datatype = 0;
+ Ref lang = 0;
+ uint32_t flags = 0;
+ const uint8_t c = peek_byte(reader);
+ if (!fancy_syntax(reader)) {
+ switch (c) {
+ case '"': case ':': case '<': case '_': break;
+ default: return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "expected: ':', '<', or '_'\n");
+ }
+ }
+ switch (c) {
+ case '\0': case ')':
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "expected object\n");
+ case '[':
+ simple = false;
+ TRY_THROW(ret = read_anon(reader, *ctx, false, &o));
+ break;
+ case '(':
+ simple = false;
+ TRY_THROW(ret = read_collection(reader, *ctx, &o));
+ break;
+ case '_':
+ TRY_THROW(ret = (o = read_BLANK_NODE_LABEL(reader, ate_dot)));
+ break;
+ case '<': case ':':
+ TRY_THROW(ret = read_iri(reader, &o, ate_dot));
+ break;
+ case '+': case '-': case '.': case '0': case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7': case '8': case '9':
+ TRY_THROW(ret = read_number(reader, &o, &datatype, ate_dot));
+ break;
+ case '\"':
+ case '\'':
+ TRY_THROW(ret = read_literal(reader, &o, &datatype, &lang, &flags, ate_dot));
+ break;
+ default:
+ /* Either a boolean literal, or a qname. Read the prefix first, and if
+ it is in fact a "true" or "false" literal, produce that instead.
+ */
+ o = push_node(reader, SERD_CURIE, "", 0);
+ while (!read_PN_CHARS_BASE(reader, o)) {}
+ node = deref(reader, o);
+ if ((node->n_bytes == 4 && !memcmp(node->buf, "true", 4)) ||
+ (node->n_bytes == 5 && !memcmp(node->buf, "false", 5))) {
+ node->type = SERD_LITERAL;
+ datatype = push_node(
+ reader, SERD_URI, XSD_BOOLEAN, XSD_BOOLEAN_LEN);
+ ret = true;
+ } else if (read_PN_PREFIX_tail(reader, o) > SERD_FAILURE) {
+ ret = false;
+ } else {
+ if (!(ret = read_PrefixedName(reader, o, false, ate_dot))) {
+ r_err(reader, SERD_ERR_BAD_SYNTAX, "expected prefixed name\n");
+ }
+ }
+ }
+
+ if (simple && o) {
+ deref(reader, o)->flags = flags;
+ }
+
+ if (ret && emit && simple) {
+ ret = emit_statement(reader, *ctx, o, datatype, lang);
+ } else if (ret && !emit) {
+ ctx->object = o;
+ ctx->datatype = datatype;
+ ctx->lang = lang;
+ return true;
+ }
+
+except:
+ pop_node(reader, lang);
+ pop_node(reader, datatype);
+ pop_node(reader, o);
+#ifndef NDEBUG
+ assert(reader->stack.size == orig_stack_size);
+#endif
+ return ret;
+}
+
+static bool
+read_objectList(SerdReader* reader, ReadContext ctx, bool* ate_dot)
+{
+ TRY_RET(read_object(reader, &ctx, true, ate_dot));
+ if (!fancy_syntax(reader) && peek_delim(reader, ',')) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "syntax does not support abbreviation\n");
+ }
+
+ while (!*ate_dot && eat_delim(reader, ',')) {
+ TRY_RET(read_object(reader, &ctx, true, ate_dot));
+ }
+ return true;
+}
+
+static bool
+read_predicateObjectList(SerdReader* reader, ReadContext ctx, bool* ate_dot)
+{
+ while (read_verb(reader, &ctx.predicate) &&
+ read_ws_star(reader) &&
+ read_objectList(reader, ctx, ate_dot)) {
+ ctx.predicate = pop_node(reader, ctx.predicate);
+ if (*ate_dot) {
+ return true;
+ }
+
+ bool ate_semi = false;
+ uint8_t c;
+ do {
+ read_ws_star(reader);
+ switch (c = peek_byte(reader)) {
+ case 0:
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "unexpected end of file\n");
+ case '.': case ']': case '}':
+ return true;
+ case ';':
+ eat_byte_safe(reader, c);
+ ate_semi = true;
+ }
+ } while (c == ';');
+
+ if (!ate_semi) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "missing ';' or '.'\n");
+ }
+ }
+
+ return pop_node(reader, ctx.predicate);
+}
+
+static bool
+end_collection(SerdReader* reader, ReadContext ctx, Ref n1, Ref n2, bool ret)
+{
+ pop_node(reader, n2);
+ pop_node(reader, n1);
+ *ctx.flags &= ~SERD_LIST_CONT;
+ return ret && (eat_byte_safe(reader, ')') == ')');
+}
+
+static bool
+read_collection(SerdReader* reader, ReadContext ctx, Ref* dest)
+{
+ eat_byte_safe(reader, '(');
+ bool end = peek_delim(reader, ')');
+ *dest = end ? reader->rdf_nil : blank_id(reader);
+ if (ctx.subject) {
+ // subject predicate _:head
+ *ctx.flags |= (end ? 0 : SERD_LIST_O_BEGIN);
+ TRY_RET(emit_statement(reader, ctx, *dest, 0, 0));
+ *ctx.flags |= SERD_LIST_CONT;
+ } else {
+ *ctx.flags |= (end ? 0 : SERD_LIST_S_BEGIN);
+ }
+
+ if (end) {
+ return end_collection(reader, ctx, 0, 0, true);
+ }
+
+ /* The order of node allocation here is necessarily not in stack order,
+ so we create two nodes and recycle them throughout. */
+ Ref n1 = push_node_padded(reader, genid_size(reader), SERD_BLANK, "", 0);
+ Ref n2 = 0;
+ Ref node = n1;
+ Ref rest = 0;
+
+ ctx.subject = *dest;
+ while (!(end = peek_delim(reader, ')'))) {
+ // _:node rdf:first object
+ ctx.predicate = reader->rdf_first;
+ bool ate_dot = false;
+ if (!read_object(reader, &ctx, true, &ate_dot) || ate_dot) {
+ return end_collection(reader, ctx, n1, n2, false);
+ }
+
+ if (!(end = peek_delim(reader, ')'))) {
+ /* Give rest a new ID. Done as late as possible to ensure it is
+ used and > IDs generated by read_object above. */
+ if (!rest) {
+ rest = n2 = blank_id(reader); // First pass, push
+ } else {
+ set_blank_id(reader, rest, genid_size(reader));
+ }
+ }
+
+ // _:node rdf:rest _:rest
+ *ctx.flags |= SERD_LIST_CONT;
+ ctx.predicate = reader->rdf_rest;
+ TRY_RET(emit_statement(reader, ctx,
+ (end ? reader->rdf_nil : rest), 0, 0));
+
+ ctx.subject = rest; // _:node = _:rest
+ rest = node; // _:rest = (old)_:node
+ node = ctx.subject; // invariant
+ }
+
+ return end_collection(reader, ctx, n1, n2, true);
+}
+
+static Ref
+read_subject(SerdReader* reader, ReadContext ctx, Ref* dest, char* s_type)
+{
+ bool ate_dot = false;
+ switch ((*s_type = peek_byte(reader))) {
+ case '[':
+ read_anon(reader, ctx, true, dest);
+ break;
+ case '(':
+ read_collection(reader, ctx, dest);
+ break;
+ case '_':
+ *dest = read_BLANK_NODE_LABEL(reader, &ate_dot);
+ break;
+ default:
+ TRY_RET(read_iri(reader, dest, &ate_dot));
+ }
+ return ate_dot ? pop_node(reader, *dest) : *dest;
+}
+
+static Ref
+read_labelOrSubject(SerdReader* reader, ReadContext ctx)
+{
+ Ref subject = 0;
+ bool ate_dot = false;
+ switch (peek_byte(reader)) {
+ case '[':
+ eat_byte_safe(reader, '[');
+ read_ws_star(reader);
+ TRY_RET(eat_byte_check(reader, ']'));
+ return blank_id(reader);
+ case '_':
+ return read_BLANK_NODE_LABEL(reader, &ate_dot);
+ default:
+ read_iri(reader, &subject, &ate_dot);
+ }
+ return subject;
+}
+
+static bool
+read_triples(SerdReader* reader, ReadContext ctx, bool* ate_dot)
+{
+ bool ret = false;
+ if (ctx.subject) {
+ read_ws_star(reader);
+ switch (peek_byte(reader)) {
+ case '.':
+ *ate_dot = eat_byte_safe(reader, '.');
+ return false;
+ case '}':
+ return false;
+ }
+ ret = read_predicateObjectList(reader, ctx, ate_dot);
+ }
+ ctx.subject = ctx.predicate = 0;
+ return ret;
+}
+
+static bool
+read_base(SerdReader* reader, bool sparql, bool token)
+{
+ if (token) {
+ TRY_RET(eat_string(reader, "base", 4));
+ }
+
+ Ref uri;
+ read_ws_star(reader);
+ TRY_RET(uri = read_IRIREF(reader));
+ if (reader->base_sink) {
+ reader->base_sink(reader->handle, deref(reader, uri));
+ }
+ pop_node(reader, uri);
+
+ read_ws_star(reader);
+ if (!sparql) {
+ return eat_byte_check(reader, '.');
+ } else if (peek_byte(reader) == '.') {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "full stop after SPARQL BASE\n");
+ }
+ return true;
+}
+
+static bool
+read_prefixID(SerdReader* reader, bool sparql, bool token)
+{
+ if (token) {
+ TRY_RET(eat_string(reader, "prefix", 6));
+ }
+
+ read_ws_star(reader);
+ bool ret = true;
+ Ref name = push_node(reader, SERD_LITERAL, "", 0);
+ if (read_PN_PREFIX(reader, name) > SERD_FAILURE) {
+ return pop_node(reader, name);
+ }
+
+ if (eat_byte_check(reader, ':') != ':') {
+ return pop_node(reader, name);
+ }
+
+ read_ws_star(reader);
+ const Ref uri = read_IRIREF(reader);
+ if (!uri) {
+ pop_node(reader, name);
+ return false;
+ }
+
+ if (reader->prefix_sink) {
+ ret = !reader->prefix_sink(reader->handle,
+ deref(reader, name),
+ deref(reader, uri));
+ }
+ pop_node(reader, uri);
+ pop_node(reader, name);
+ if (!sparql) {
+ read_ws_star(reader);
+ return eat_byte_check(reader, '.');
+ }
+ return ret;
+}
+
+static bool
+read_directive(SerdReader* reader)
+{
+ const bool sparql = peek_byte(reader) != '@';
+ if (!sparql) {
+ eat_byte_safe(reader, '@');
+ switch (peek_byte(reader)) {
+ case 'B': case 'P':
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "uppercase directive\n");
+ }
+ }
+
+ switch (peek_byte(reader)) {
+ case 'B': case 'b': return read_base(reader, sparql, true);
+ case 'P': case 'p': return read_prefixID(reader, sparql, true);
+ default:
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "invalid directive\n");
+ }
+
+ return true;
+}
+
+static bool
+read_wrappedGraph(SerdReader* reader, ReadContext* ctx)
+{
+ bool ate_dot = false;
+ char s_type = 0;
+ TRY_RET(eat_byte_check(reader, '{'));
+ read_ws_star(reader);
+ while (peek_byte(reader) != '}') {
+ ctx->subject = 0;
+ Ref subj = read_subject(reader, *ctx, &ctx->subject, &s_type);
+ if (!subj && ctx->subject) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX, "bad subject\n");
+ } else if (!subj) {
+ return false;
+ } else if (!read_triples(reader, *ctx, &ate_dot) && s_type != '[') {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "missing predicate object list\n");
+ }
+ pop_node(reader, subj);
+ read_ws_star(reader);
+ if (peek_byte(reader) == '.') {
+ eat_byte_safe(reader, '.');
+ }
+ read_ws_star(reader);
+ }
+ return eat_byte_check(reader, '}');
+}
+
+static int
+tokcmp(SerdReader* reader, Ref ref, const char* tok, size_t n)
+{
+ SerdNode* node = deref(reader, ref);
+ if (!node || node->n_bytes != n) {
+ return -1;
+ }
+ return serd_strncasecmp((const char*)node->buf, tok, n);
+}
+
+bool
+read_n3_statement(SerdReader* reader)
+{
+ SerdStatementFlags flags = 0;
+ ReadContext ctx = { 0, 0, 0, 0, 0, 0, &flags };
+ Ref subj = 0;
+ bool ate_dot = false;
+ char s_type = 0;
+ bool ret = true;
+ read_ws_star(reader);
+ switch (peek_byte(reader)) {
+ case '\0':
+ reader->source.eof = true;
+ return reader->status <= SERD_FAILURE;
+ case '@':
+ if (!fancy_syntax(reader)) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "syntax does not support directives\n");
+ }
+ TRY_RET(read_directive(reader));
+ read_ws_star(reader);
+ break;
+ case '{':
+ if (reader->syntax == SERD_TRIG) {
+ TRY_RET(read_wrappedGraph(reader, &ctx));
+ read_ws_star(reader);
+ } else {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "syntax does not support graphs\n");
+ }
+ break;
+ default:
+ subj = read_subject(reader, ctx, &ctx.subject, &s_type);
+ if (!tokcmp(reader, ctx.subject, "base", 4)) {
+ ret = read_base(reader, true, false);
+ } else if (!tokcmp(reader, ctx.subject, "prefix", 6)) {
+ ret = read_prefixID(reader, true, false);
+ } else if (!tokcmp(reader, ctx.subject, "graph", 5)) {
+ read_ws_star(reader);
+ TRY_RET((ctx.graph = read_labelOrSubject(reader, ctx)));
+ read_ws_star(reader);
+ TRY_RET(read_wrappedGraph(reader, &ctx));
+ pop_node(reader, ctx.graph);
+ ctx.graph = 0;
+ read_ws_star(reader);
+ } else if (read_ws_star(reader) && peek_byte(reader) == '{') {
+ if (s_type == '(' || (s_type == '[' && !*ctx.flags)) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "invalid graph name\n");
+ }
+ ctx.graph = subj;
+ ctx.subject = subj = 0;
+ TRY_RET(read_wrappedGraph(reader, &ctx));
+ pop_node(reader, ctx.graph);
+ read_ws_star(reader);
+ } else if (!subj) {
+ ret = r_err(reader, SERD_ERR_BAD_SYNTAX, "bad subject\n");
+ } else if (!read_triples(reader, ctx, &ate_dot)) {
+ if (!(ret = (s_type == '[')) && ate_dot) {
+ ret = r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "unexpected end of statement\n");
+ }
+ } else if (!ate_dot) {
+ read_ws_star(reader);
+ ret = (eat_byte_check(reader, '.') == '.');
+ }
+ pop_node(reader, subj);
+ break;
+ }
+ return ret;
+}
+
+static void
+skip_until(SerdReader* reader, uint8_t byte)
+{
+ for (uint8_t c = 0; (c = peek_byte(reader)) && c != byte;) {
+ eat_byte_safe(reader, c);
+ }
+}
+
+bool
+read_turtleTrigDoc(SerdReader* reader)
+{
+ while (!reader->source.eof) {
+ if (!read_n3_statement(reader)) {
+ if (reader->strict) {
+ return 0;
+ }
+ skip_until(reader, '\n');
+ reader->status = SERD_SUCCESS;
+ }
+ }
+ return reader->status <= SERD_FAILURE;
+}
+
+bool
+read_nquadsDoc(SerdReader* reader)
+{
+ while (!reader->source.eof) {
+ SerdStatementFlags flags = 0;
+ ReadContext ctx = { 0, 0, 0, 0, 0, 0, &flags };
+ bool ate_dot = false;
+ char s_type = false;
+ read_ws_star(reader);
+ if (peek_byte(reader) == '\0') {
+ reader->source.eof = true;
+ break;
+ } else if (peek_byte(reader) == '@') {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "syntax does not support directives\n");
+ }
+
+ // subject predicate object
+ if (!(ctx.subject = read_subject(reader, ctx, &ctx.subject, &s_type)) ||
+ !read_ws_star(reader) ||
+ !(ctx.predicate = read_IRIREF(reader)) ||
+ !read_ws_star(reader) ||
+ !read_object(reader, &ctx, false, &ate_dot)) {
+ return false;
+ }
+
+ if (!ate_dot) { // graphLabel?
+ TRY_RET(read_ws_star(reader));
+ switch (peek_byte(reader)) {
+ case '.':
+ break;
+ case '_':
+ ctx.graph = read_BLANK_NODE_LABEL(reader, &ate_dot);
+ break;
+ default:
+ if (!(ctx.graph = read_IRIREF(reader))) {
+ return false;
+ }
+ }
+
+ // Terminating '.'
+ TRY_RET(read_ws_star(reader));
+ eat_byte_check(reader, '.');
+ }
+
+ TRY_RET(emit_statement(reader, ctx, ctx.object, ctx.datatype, ctx.lang));
+ pop_node(reader, ctx.graph);
+ pop_node(reader, ctx.lang);
+ pop_node(reader, ctx.datatype);
+ pop_node(reader, ctx.object);
+ }
+ return reader->status <= SERD_FAILURE;
+}
diff --git a/src/node.c b/src/node.c
new file mode 100644
index 00000000..92bf3bde
--- /dev/null
+++ b/src/node.c
@@ -0,0 +1,387 @@
+/*
+ Copyright 2011-2016 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <math.h>
+#include <float.h>
+
+#ifdef _WIN32
+# ifndef isnan
+# define isnan(x) _isnan(x)
+# endif
+# ifndef isinf
+# define isinf(x) (!_finite(x))
+# endif
+#endif
+
+SerdNode
+serd_node_from_string(SerdType type, const uint8_t* str)
+{
+ if (!str) {
+ return SERD_NODE_NULL;
+ }
+
+ uint32_t flags = 0;
+ size_t buf_n_bytes = 0;
+ const size_t buf_n_chars = serd_strlen(str, &buf_n_bytes, &flags);
+ SerdNode ret = { str, buf_n_bytes, buf_n_chars, flags, type };
+ return ret;
+}
+
+SerdNode
+serd_node_from_substring(SerdType type, const uint8_t* str, const size_t len)
+{
+ if (!str) {
+ return SERD_NODE_NULL;
+ }
+
+ uint32_t flags = 0;
+ size_t buf_n_bytes = 0;
+ const size_t buf_n_chars = serd_substrlen(str, len, &buf_n_bytes, &flags);
+ assert(buf_n_bytes <= len);
+ SerdNode ret = { str, buf_n_bytes, buf_n_chars, flags, type };
+ return ret;
+}
+
+SerdNode
+serd_node_copy(const SerdNode* node)
+{
+ if (!node || !node->buf) {
+ return SERD_NODE_NULL;
+ }
+
+ SerdNode copy = *node;
+ uint8_t* buf = (uint8_t*)malloc(copy.n_bytes + 1);
+ memcpy(buf, node->buf, copy.n_bytes + 1);
+ copy.buf = buf;
+ return copy;
+}
+
+bool
+serd_node_equals(const SerdNode* a, const SerdNode* b)
+{
+ return (a == b)
+ || (a->type == b->type
+ && a->n_bytes == b->n_bytes
+ && a->n_chars == b->n_chars
+ && ((a->buf == b->buf) || !memcmp((const char*)a->buf,
+ (const char*)b->buf,
+ a->n_bytes + 1)));
+}
+
+static size_t
+serd_uri_string_length(const SerdURI* uri)
+{
+ size_t len = uri->path_base.len;
+
+#define ADD_LEN(field, n_delims) \
+ if ((field).len) { len += (field).len + (n_delims); }
+
+ ADD_LEN(uri->path, 1); // + possible leading `/'
+ ADD_LEN(uri->scheme, 1); // + trailing `:'
+ ADD_LEN(uri->authority, 2); // + leading `//'
+ ADD_LEN(uri->query, 1); // + leading `?'
+ ADD_LEN(uri->fragment, 1); // + leading `#'
+
+ return len + 2; // + 2 for authority `//'
+}
+
+static size_t
+string_sink(const void* buf, size_t len, void* stream)
+{
+ uint8_t** ptr = (uint8_t**)stream;
+ memcpy(*ptr, buf, len);
+ *ptr += len;
+ return len;
+}
+
+SerdNode
+serd_node_new_uri_from_node(const SerdNode* uri_node,
+ const SerdURI* base,
+ SerdURI* out)
+{
+ return (uri_node->type == SERD_URI && uri_node->buf)
+ ? serd_node_new_uri_from_string(uri_node->buf, base, out)
+ : SERD_NODE_NULL;
+}
+
+SerdNode
+serd_node_new_uri_from_string(const uint8_t* str,
+ const SerdURI* base,
+ SerdURI* out)
+{
+ if (!str || str[0] == '\0') {
+ // Empty URI => Base URI, or nothing if no base is given
+ return base ? serd_node_new_uri(base, NULL, out) : SERD_NODE_NULL;
+ }
+
+ SerdURI uri;
+ serd_uri_parse(str, &uri);
+ return serd_node_new_uri(&uri, base, out); // Resolve/Serialise
+}
+
+static inline bool
+is_uri_path_char(const uint8_t c)
+{
+ if (is_alpha(c) || is_digit(c)) {
+ return true;
+ }
+ switch (c) {
+ case '-': case '.': case '_': case '~': // unreserved
+ case ':': case '@': // pchar
+ case '/': // separator
+ // sub-delims
+ case '!': case '$': case '&': case '\'': case '(': case ')':
+ case '*': case '+': case ',': case ';': case '=':
+ return true;
+ default:
+ return false;
+ }
+}
+
+SerdNode
+serd_node_new_file_uri(const uint8_t* path,
+ const uint8_t* hostname,
+ SerdURI* out,
+ bool escape)
+{
+ const size_t path_len = strlen((const char*)path);
+ const size_t hostname_len = hostname ? strlen((const char*)hostname) : 0;
+ const bool evil = is_windows_path(path);
+ size_t uri_len = 0;
+ uint8_t* uri = NULL;
+
+ if (path[0] == '/' || is_windows_path(path)) {
+ uri_len = strlen("file://") + hostname_len + evil;
+ uri = (uint8_t*)malloc(uri_len + 1);
+ snprintf((char*)uri, uri_len + 1, "file://%s%s",
+ hostname ? (const char*)hostname : "",
+ evil ? "/" : "");
+ }
+
+ SerdChunk chunk = { uri, uri_len };
+ for (size_t i = 0; i < path_len; ++i) {
+ if (evil && path[i] == '\\') {
+ serd_chunk_sink("/", 1, &chunk);
+ } else if (path[i] == '%') {
+ serd_chunk_sink("%%", 2, &chunk);
+ } else if (!escape || is_uri_path_char(path[i])) {
+ serd_chunk_sink(path + i, 1, &chunk);
+ } else {
+ char escape_str[4] = { '%', 0, 0, 0 };
+ snprintf(escape_str + 1, sizeof(escape_str) - 1, "%X", path[i]);
+ serd_chunk_sink(escape_str, 3, &chunk);
+ }
+ }
+ serd_chunk_sink_finish(&chunk);
+
+ if (out) {
+ serd_uri_parse(chunk.buf, out);
+ }
+
+ return serd_node_from_substring(SERD_URI, chunk.buf, chunk.len);
+}
+
+SerdNode
+serd_node_new_uri(const SerdURI* uri, const SerdURI* base, SerdURI* out)
+{
+ SerdURI abs_uri = *uri;
+ if (base) {
+ serd_uri_resolve(uri, base, &abs_uri);
+ }
+
+ const size_t len = serd_uri_string_length(&abs_uri);
+ uint8_t* buf = (uint8_t*)malloc(len + 1);
+ SerdNode node = { buf, 0, 0, 0, SERD_URI };
+ uint8_t* ptr = buf;
+ const size_t actual_len = serd_uri_serialise(&abs_uri, string_sink, &ptr);
+
+ buf[actual_len] = '\0';
+ node.n_bytes = actual_len;
+ node.n_chars = serd_strlen(buf, NULL, NULL);
+
+ if (out) {
+ serd_uri_parse(buf, out); // TODO: cleverly avoid double parse
+ }
+
+ return node;
+}
+
+SerdNode
+serd_node_new_relative_uri(const SerdURI* uri,
+ const SerdURI* base,
+ const SerdURI* root,
+ SerdURI* out)
+{
+ const size_t uri_len = serd_uri_string_length(uri);
+ const size_t base_len = serd_uri_string_length(base);
+ uint8_t* buf = (uint8_t*)malloc(uri_len + base_len + 1);
+ SerdNode node = { buf, 0, 0, 0, SERD_URI };
+ uint8_t* ptr = buf;
+ const size_t actual_len = serd_uri_serialise_relative(
+ uri, base, root, string_sink, &ptr);
+
+ buf[actual_len] = '\0';
+ node.n_bytes = actual_len;
+ node.n_chars = serd_strlen(buf, NULL, NULL);
+
+ if (out) {
+ serd_uri_parse(buf, out); // TODO: cleverly avoid double parse
+ }
+
+ return node;
+}
+
+static inline unsigned
+serd_digits(double abs)
+{
+ const double lg = ceil(log10(floor(abs) + 1.0));
+ return lg < 1.0 ? 1U : (unsigned)lg;
+}
+
+SerdNode
+serd_node_new_decimal(double d, unsigned frac_digits)
+{
+ if (isnan(d) || isinf(d)) {
+ return SERD_NODE_NULL;
+ }
+
+ const double abs_d = fabs(d);
+ const unsigned int_digits = serd_digits(abs_d);
+ char* buf = (char*)calloc(int_digits + frac_digits + 3, 1);
+ SerdNode node = { (const uint8_t*)buf, 0, 0, 0, SERD_LITERAL };
+ const double int_part = floor(abs_d);
+
+ // Point s to decimal point location
+ char* s = buf + int_digits;
+ if (d < 0.0) {
+ *buf = '-';
+ ++s;
+ }
+
+ // Write integer part (right to left)
+ char* t = s - 1;
+ uint64_t dec = (uint64_t)int_part;
+ do {
+ *t-- = '0' + (dec % 10);
+ } while ((dec /= 10) > 0);
+
+ *s++ = '.';
+
+ // Write fractional part (right to left)
+ double frac_part = fabs(d - int_part);
+ if (frac_part < DBL_EPSILON) {
+ *s++ = '0';
+ node.n_bytes = node.n_chars = (s - buf);
+ } else {
+ uint64_t frac = frac_part * pow(10.0, (int)frac_digits) + 0.5;
+ s += frac_digits - 1;
+ unsigned i = 0;
+
+ // Skip trailing zeros
+ for (; i < frac_digits - 1 && !(frac % 10); ++i, --s, frac /= 10) {}
+
+ node.n_bytes = node.n_chars = (s - buf) + 1;
+
+ // Write digits from last trailing zero to decimal point
+ for (; i < frac_digits; ++i) {
+ *s-- = '0' + (frac % 10);
+ frac /= 10;
+ }
+ }
+
+ return node;
+}
+
+SerdNode
+serd_node_new_integer(int64_t i)
+{
+ int64_t abs_i = (i < 0) ? -i : i;
+ const unsigned digits = serd_digits(abs_i);
+ char* buf = (char*)calloc(digits + 2, 1);
+ SerdNode node = { (const uint8_t*)buf, 0, 0, 0, SERD_LITERAL };
+
+ // Point s to the end
+ char* s = buf + digits - 1;
+ if (i < 0) {
+ *buf = '-';
+ ++s;
+ }
+
+ node.n_bytes = node.n_chars = (s - buf) + 1;
+
+ // Write integer part (right to left)
+ do {
+ *s-- = '0' + (abs_i % 10);
+ } while ((abs_i /= 10) > 0);
+
+ return node;
+}
+
+/**
+ Base64 encoding table.
+ @see <a href="http://tools.ietf.org/html/rfc3548#section-3">RFC3986 S3</a>.
+*/
+static const uint8_t b64_map[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/**
+ Encode 3 raw bytes to 4 base64 characters.
+*/
+static inline void
+encode_chunk(uint8_t out[4], const uint8_t in[3], size_t n_in)
+{
+ out[0] = b64_map[in[0] >> 2];
+ out[1] = b64_map[((in[0] & 0x03) << 4) | ((in[1] & 0xF0) >> 4)];
+ out[2] = ((n_in > 1)
+ ? (b64_map[((in[1] & 0x0F) << 2) | ((in[2] & 0xC0) >> 6)])
+ : (uint8_t)'=');
+ out[3] = ((n_in > 2) ? b64_map[in[2] & 0x3F] : (uint8_t)'=');
+}
+
+SerdNode
+serd_node_new_blob(const void* buf, size_t size, bool wrap_lines)
+{
+ const size_t len = (size + 2) / 3 * 4 + (wrap_lines * ((size - 1) / 57));
+ uint8_t* str = (uint8_t*)calloc(len + 2, 1);
+ SerdNode node = { str, len, len, 0, SERD_LITERAL };
+ for (size_t i = 0, j = 0; i < size; i += 3, j += 4) {
+ uint8_t in[4] = { 0, 0, 0, 0 };
+ size_t n_in = MIN(3, size - i);
+ memcpy(in, (const uint8_t*)buf + i, n_in);
+
+ if (wrap_lines && i > 0 && (i % 57) == 0) {
+ str[j++] = '\n';
+ node.flags |= SERD_HAS_NEWLINE;
+ }
+
+ encode_chunk(str + j, in, n_in);
+ }
+ return node;
+}
+
+void
+serd_node_free(SerdNode* node)
+{
+ if (node && node->buf) {
+ free((uint8_t*)node->buf);
+ node->buf = NULL;
+ }
+}
diff --git a/src/reader.c b/src/reader.c
new file mode 100644
index 00000000..f37eac14
--- /dev/null
+++ b/src/reader.c
@@ -0,0 +1,399 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int
+r_err(SerdReader* reader, SerdStatus st, const char* fmt, ...)
+{
+ va_list args;
+ va_start(args, fmt);
+ const Cursor* const cur = &reader->source.cur;
+ const SerdError e = { st, cur->filename, cur->line, cur->col, fmt, &args };
+ serd_error(reader->error_sink, reader->error_handle, &e);
+ va_end(args);
+ return 0;
+}
+
+void
+set_blank_id(SerdReader* reader, Ref ref, size_t buf_size)
+{
+ SerdNode* node = deref(reader, ref);
+ const char* prefix = reader->bprefix ? (const char*)reader->bprefix : "";
+ node->n_bytes = node->n_chars = snprintf(
+ (char*)node->buf, buf_size, "%sb%u", prefix, reader->next_id++);
+}
+
+size_t
+genid_size(SerdReader* reader)
+{
+ return reader->bprefix_len + 1 + 10 + 1; // + "b" + UINT32_MAX + \0
+}
+
+Ref
+blank_id(SerdReader* reader)
+{
+ Ref ref = push_node_padded(reader, genid_size(reader), SERD_BLANK, "", 0);
+ set_blank_id(reader, ref, genid_size(reader));
+ return ref;
+}
+
+/** fread-like wrapper for getc (which is faster). */
+static size_t
+serd_file_read_byte(void* buf, size_t size, size_t nmemb, void* stream)
+{
+ const int c = getc((FILE*)stream);
+ if (c == EOF) {
+ *((uint8_t*)buf) = 0;
+ return 0;
+ }
+ *((uint8_t*)buf) = (uint8_t)c;
+ return 1;
+}
+
+Ref
+push_node_padded(SerdReader* reader, size_t maxlen,
+ SerdType type, const char* str, size_t n_bytes)
+{
+ void* mem = serd_stack_push_aligned(
+ &reader->stack, sizeof(SerdNode) + maxlen + 1, sizeof(SerdNode));
+
+ SerdNode* const node = (SerdNode*)mem;
+ node->n_bytes = node->n_chars = n_bytes;
+ node->flags = 0;
+ node->type = type;
+ node->buf = NULL;
+
+ uint8_t* buf = (uint8_t*)(node + 1);
+ memcpy(buf, str, n_bytes + 1);
+
+#ifdef SERD_STACK_CHECK
+ reader->allocs = realloc(
+ reader->allocs, sizeof(reader->allocs) * (++reader->n_allocs));
+ reader->allocs[reader->n_allocs - 1] = ((uint8_t*)mem - reader->stack.buf);
+#endif
+ return (uint8_t*)node - reader->stack.buf;
+}
+
+Ref
+push_node(SerdReader* reader, SerdType type, const char* str, size_t n_bytes)
+{
+ return push_node_padded(reader, n_bytes, type, str, n_bytes);
+}
+
+SerdNode*
+deref(SerdReader* reader, const Ref ref)
+{
+ if (ref) {
+ SerdNode* node = (SerdNode*)(reader->stack.buf + ref);
+ node->buf = (uint8_t*)node + sizeof(SerdNode);
+ return node;
+ }
+ return NULL;
+}
+
+Ref
+pop_node(SerdReader* reader, Ref ref)
+{
+ if (ref && ref != reader->rdf_first && ref != reader->rdf_rest
+ && ref != reader->rdf_nil) {
+#ifdef SERD_STACK_CHECK
+ SERD_STACK_ASSERT_TOP(reader, ref);
+ --reader->n_allocs;
+#endif
+ SerdNode* const node = deref(reader, ref);
+ uint8_t* const top = reader->stack.buf + reader->stack.size;
+ serd_stack_pop_aligned(&reader->stack, top - (uint8_t*)node);
+ }
+ return 0;
+}
+
+bool
+emit_statement(SerdReader* reader, ReadContext ctx, Ref o, Ref d, Ref l)
+{
+ SerdNode* graph = deref(reader, ctx.graph);
+ if (!graph && reader->default_graph.buf) {
+ graph = &reader->default_graph;
+ }
+ bool ret = !reader->statement_sink ||
+ !reader->statement_sink(
+ reader->handle, *ctx.flags, graph,
+ deref(reader, ctx.subject), deref(reader, ctx.predicate),
+ deref(reader, o), deref(reader, d), deref(reader, l));
+ *ctx.flags &= SERD_ANON_CONT|SERD_LIST_CONT; // Preserve only cont flags
+ return ret;
+}
+
+static bool
+read_statement(SerdReader* reader)
+{
+ switch (reader->syntax) {
+ default: return read_n3_statement(reader);
+ }
+}
+
+static bool
+read_doc(SerdReader* reader)
+{
+ switch (reader->syntax) {
+ case SERD_NQUADS: return read_nquadsDoc(reader);
+ default: return read_turtleTrigDoc(reader);
+ }
+}
+
+SerdReader*
+serd_reader_new(SerdSyntax syntax,
+ void* handle,
+ void (*free_handle)(void*),
+ SerdBaseSink base_sink,
+ SerdPrefixSink prefix_sink,
+ SerdStatementSink statement_sink,
+ SerdEndSink end_sink)
+{
+ SerdReader* me = (SerdReader*)calloc(1, sizeof(SerdReader));
+ me->handle = handle;
+ me->free_handle = free_handle;
+ me->base_sink = base_sink;
+ me->prefix_sink = prefix_sink;
+ me->statement_sink = statement_sink;
+ me->end_sink = end_sink;
+ me->default_graph = SERD_NODE_NULL;
+ me->stack = serd_stack_new(SERD_PAGE_SIZE);
+ me->syntax = syntax;
+ me->next_id = 1;
+ me->strict = true;
+
+ me->rdf_first = push_node(me, SERD_URI, NS_RDF "first", 48);
+ me->rdf_rest = push_node(me, SERD_URI, NS_RDF "rest", 47);
+ me->rdf_nil = push_node(me, SERD_URI, NS_RDF "nil", 46);
+
+ return me;
+}
+
+void
+serd_reader_set_strict(SerdReader* reader, bool strict)
+{
+ reader->strict = strict;
+}
+
+void
+serd_reader_set_error_sink(SerdReader* reader,
+ SerdErrorSink error_sink,
+ void* error_handle)
+{
+ reader->error_sink = error_sink;
+ reader->error_handle = error_handle;
+}
+
+void
+serd_reader_free(SerdReader* reader)
+{
+ pop_node(reader, reader->rdf_nil);
+ pop_node(reader, reader->rdf_rest);
+ pop_node(reader, reader->rdf_first);
+ serd_node_free(&reader->default_graph);
+
+#ifdef SERD_STACK_CHECK
+ free(reader->allocs);
+#endif
+ free(reader->stack.buf);
+ free(reader->bprefix);
+ if (reader->free_handle) {
+ reader->free_handle(reader->handle);
+ }
+ free(reader);
+}
+
+void*
+serd_reader_get_handle(const SerdReader* reader)
+{
+ return reader->handle;
+}
+
+void
+serd_reader_add_blank_prefix(SerdReader* reader,
+ const uint8_t* prefix)
+{
+ free(reader->bprefix);
+ reader->bprefix_len = 0;
+ reader->bprefix = NULL;
+ if (prefix) {
+ reader->bprefix_len = strlen((const char*)prefix);
+ reader->bprefix = (uint8_t*)malloc(reader->bprefix_len + 1);
+ memcpy(reader->bprefix, prefix, reader->bprefix_len + 1);
+ }
+}
+
+void
+serd_reader_set_default_graph(SerdReader* reader,
+ const SerdNode* graph)
+{
+ serd_node_free(&reader->default_graph);
+ reader->default_graph = serd_node_copy(graph);
+}
+
+SerdStatus
+serd_reader_read_file(SerdReader* reader,
+ const uint8_t* uri)
+{
+ uint8_t* const path = serd_file_uri_parse(uri, NULL);
+ if (!path) {
+ return SERD_ERR_BAD_ARG;
+ }
+
+ FILE* fd = serd_fopen((const char*)path, "rb");
+ if (!fd) {
+ serd_free(path);
+ return SERD_ERR_UNKNOWN;
+ }
+
+ SerdStatus ret = serd_reader_read_file_handle(reader, fd, path);
+ fclose(fd);
+ free(path);
+ return ret;
+}
+
+static SerdStatus
+skip_bom(SerdReader* me)
+{
+ if (serd_byte_source_peek(&me->source) == 0xEF) {
+ serd_byte_source_advance(&me->source);
+ if (serd_byte_source_peek(&me->source) != 0xBB ||
+ serd_byte_source_advance(&me->source) ||
+ serd_byte_source_peek(&me->source) != 0xBF ||
+ serd_byte_source_advance(&me->source)) {
+ r_err(me, SERD_ERR_BAD_SYNTAX, "corrupt byte order mark\n");
+ return SERD_ERR_BAD_SYNTAX;
+ }
+ }
+
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_reader_start_stream(SerdReader* reader,
+ FILE* file,
+ const uint8_t* name,
+ bool bulk)
+{
+ return serd_reader_start_source_stream(
+ reader,
+ bulk ? (SerdSource)fread : serd_file_read_byte,
+ (SerdStreamErrorFunc)ferror,
+ file,
+ name,
+ bulk ? SERD_PAGE_SIZE : 1);
+}
+
+SerdStatus
+serd_reader_start_source_stream(SerdReader* reader,
+ SerdSource read_func,
+ SerdStreamErrorFunc error_func,
+ void* stream,
+ const uint8_t* name,
+ size_t page_size)
+{
+ return serd_byte_source_open_source(
+ &reader->source, read_func, error_func, stream, name, page_size);
+}
+
+static SerdStatus
+serd_reader_prepare(SerdReader* reader)
+{
+ reader->status = serd_byte_source_prepare(&reader->source);
+ if (reader->status == SERD_SUCCESS) {
+ reader->status = skip_bom(reader);
+ } else if (reader->status == SERD_FAILURE) {
+ reader->source.eof = true;
+ } else {
+ r_err(reader, reader->status, "read error: %s\n", strerror(errno));
+ }
+ return reader->status;
+}
+
+SerdStatus
+serd_reader_read_chunk(SerdReader* reader)
+{
+ SerdStatus st = SERD_SUCCESS;
+ if (!reader->source.prepared) {
+ st = serd_reader_prepare(reader);
+ } else if (reader->source.eof) {
+ st = serd_byte_source_advance(&reader->source);
+ }
+
+ return st ? st : read_statement(reader) ? SERD_SUCCESS : SERD_FAILURE;
+}
+
+SerdStatus
+serd_reader_end_stream(SerdReader* reader)
+{
+ return serd_byte_source_close(&reader->source);
+}
+
+SerdStatus
+serd_reader_read_file_handle(SerdReader* reader,
+ FILE* file,
+ const uint8_t* name)
+{
+ return serd_reader_read_source(
+ reader, (SerdSource)fread, (SerdStreamErrorFunc)ferror,
+ file, name, SERD_PAGE_SIZE);
+}
+
+SerdStatus
+serd_reader_read_source(SerdReader* reader,
+ SerdSource source,
+ SerdStreamErrorFunc error,
+ void* stream,
+ const uint8_t* name,
+ size_t page_size)
+{
+ SerdStatus st = serd_reader_start_source_stream(
+ reader, source, error, stream, name, page_size);
+
+ if (st || (st = serd_reader_prepare(reader))) {
+ serd_reader_end_stream(reader);
+ return st;
+ } else if (!read_doc(reader)) {
+ serd_reader_end_stream(reader);
+ return SERD_ERR_UNKNOWN;
+ }
+
+ return serd_reader_end_stream(reader);
+}
+
+SerdStatus
+serd_reader_read_string(SerdReader* reader, const uint8_t* utf8)
+{
+ serd_byte_source_open_string(&reader->source, utf8);
+
+ SerdStatus st = serd_reader_prepare(reader);
+ if (!st) {
+ st = read_doc(reader) ? SERD_SUCCESS : SERD_ERR_UNKNOWN;
+ }
+
+ serd_byte_source_close(&reader->source);
+
+ return st;
+}
diff --git a/src/reader.h b/src/reader.h
new file mode 100644
index 00000000..723a1c5a
--- /dev/null
+++ b/src/reader.h
@@ -0,0 +1,86 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+static inline uint8_t
+peek_byte(SerdReader* reader)
+{
+ return serd_byte_source_peek(&reader->source);
+}
+
+static inline uint8_t
+eat_byte(SerdReader* reader)
+{
+ const uint8_t c = peek_byte(reader);
+ const SerdStatus st = serd_byte_source_advance(&reader->source);
+ if (st) {
+ reader->status = st;
+ }
+ return c;
+}
+
+static inline uint8_t
+eat_byte_safe(SerdReader* reader, const uint8_t byte)
+{
+ const uint8_t c = eat_byte(reader);
+ assert(c == byte);
+ return c;
+}
+
+static inline uint8_t
+eat_byte_check(SerdReader* reader, const uint8_t byte)
+{
+ const uint8_t c = peek_byte(reader);
+ if (c != byte) {
+ return r_err(reader, SERD_ERR_BAD_SYNTAX,
+ "expected `%c', not `%c'\n", byte, c);
+ }
+ return eat_byte_safe(reader, byte);
+}
+
+static inline bool
+eat_string(SerdReader* reader, const char* str, unsigned n)
+{
+ bool bad = false;
+ for (unsigned i = 0; i < n; ++i) {
+ bad |= (bool)eat_byte_check(reader, ((const uint8_t*)str)[i]);
+ }
+ return bad;
+}
+
+static inline SerdStatus
+push_byte(SerdReader* reader, Ref ref, const uint8_t c)
+{
+ SERD_STACK_ASSERT_TOP(reader, ref);
+ uint8_t* const s = serd_stack_push(&reader->stack, 1);
+ SerdNode* const node = (SerdNode*)(reader->stack.buf + ref);
+ ++node->n_bytes;
+ if (!(c & 0x80)) { // Starts with 0 bit, start of new character
+ ++node->n_chars;
+ }
+ *(s - 1) = c;
+ *s = '\0';
+ return SERD_SUCCESS;
+}
+
+static inline void
+push_bytes(SerdReader* reader, Ref ref, const uint8_t* bytes, unsigned len)
+{
+ for (unsigned i = 0; i < len; ++i) {
+ push_byte(reader, ref, bytes[i]);
+ }
+}
diff --git a/src/serd_internal.h b/src/serd_internal.h
new file mode 100644
index 00000000..243c1327
--- /dev/null
+++ b/src/serd_internal.h
@@ -0,0 +1,625 @@
+/*
+ Copyright 2011-2016 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef SERD_INTERNAL_H
+#define SERD_INTERNAL_H
+
+#define _POSIX_C_SOURCE 200809L /* for posix_memalign and posix_fadvise */
+
+#include <assert.h>
+#include <ctype.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "serd/serd.h"
+#include "serd_config.h"
+
+#if defined(HAVE_POSIX_FADVISE) && defined(HAVE_FILENO)
+# include <fcntl.h>
+#endif
+
+#define NS_XSD "http://www.w3.org/2001/XMLSchema#"
+#define NS_RDF "http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+
+#define SERD_PAGE_SIZE 4096
+
+#ifndef MIN
+# define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
+
+static const uint8_t replacement_char[] = { 0xEF, 0xBF, 0xBD };
+
+/* File and Buffer Utilities */
+
+static inline FILE*
+serd_fopen(const char* path, const char* mode)
+{
+ FILE* fd = fopen(path, mode);
+ if (!fd) {
+ fprintf(stderr, "error: failed to open file %s (%s)\n",
+ path, strerror(errno));
+ return NULL;
+ }
+#if defined(HAVE_POSIX_FADVISE) && defined(HAVE_FILENO)
+ posix_fadvise(fileno(fd), 0, 0, POSIX_FADV_SEQUENTIAL);
+#endif
+ return fd;
+}
+
+static inline void*
+serd_bufalloc(size_t size)
+{
+#ifdef HAVE_POSIX_MEMALIGN
+ void* ptr;
+ const int ret = posix_memalign(&ptr, SERD_PAGE_SIZE, size);
+ return ret ? NULL : ptr;
+#else
+ return malloc(size);
+#endif
+}
+
+/* Byte source */
+
+typedef struct {
+ const uint8_t* filename;
+ unsigned line;
+ unsigned col;
+} Cursor;
+
+typedef struct {
+ SerdSource read_func; ///< Read function (e.g. fread)
+ SerdStreamErrorFunc error_func; ///< Error function (e.g. ferror)
+ void* stream; ///< Stream (e.g. FILE)
+ size_t page_size; ///< Number of bytes to read at a time
+ Cursor cur; ///< Cursor for error reporting
+ uint8_t* file_buf; ///< Buffer iff reading pages from a file
+ const uint8_t* read_buf; ///< Pointer to file_buf or read_byte
+ size_t read_head; ///< Offset into read_buf
+ uint8_t read_byte; ///< 1-byte 'buffer' used when not paging
+ bool from_stream; ///< True iff reading from `stream`
+ bool prepared; ///< True iff prepared for reading
+ bool eof; ///< True iff end of file reached
+} SerdByteSource;
+
+SerdStatus
+serd_byte_source_open_file(SerdByteSource* source,
+ FILE* file,
+ bool bulk);
+
+SerdStatus
+serd_byte_source_open_string(SerdByteSource* source, const uint8_t* utf8);
+
+SerdStatus
+serd_byte_source_open_source(SerdByteSource* source,
+ SerdSource read_func,
+ SerdStreamErrorFunc error_func,
+ void* stream,
+ const uint8_t* name,
+ size_t page_size);
+
+SerdStatus
+serd_byte_source_close(SerdByteSource* source);
+
+SerdStatus
+serd_byte_source_prepare(SerdByteSource* source);
+
+SerdStatus
+serd_byte_source_page(SerdByteSource* source);
+
+static inline uint8_t
+serd_byte_source_peek(SerdByteSource* source)
+{
+ assert(source->prepared);
+ return source->read_buf[source->read_head];
+}
+
+static inline SerdStatus
+serd_byte_source_advance(SerdByteSource* source)
+{
+ SerdStatus st = SERD_SUCCESS;
+
+ switch (serd_byte_source_peek(source)) {
+ case '\0': break;
+ case '\n': ++source->cur.line; source->cur.col = 0; break;
+ default: ++source->cur.col;
+ }
+
+ if (source->from_stream) {
+ source->eof = false;
+ if (source->page_size > 1) {
+ if (++source->read_head == source->page_size) {
+ st = serd_byte_source_page(source);
+ }
+ } else {
+ if (!source->read_func(&source->read_byte, 1, 1, source->stream)) {
+ st = source->error_func(source->stream) ? SERD_ERR_UNKNOWN
+ : SERD_FAILURE;
+ }
+ }
+ } else if (!source->eof) {
+ ++source->read_head; // Move to next character in string
+ }
+
+ return source->eof ? SERD_FAILURE : st;
+}
+
+/* Stack */
+
+/** A dynamic stack in memory. */
+typedef struct {
+ uint8_t* buf; ///< Stack memory
+ size_t buf_size; ///< Allocated size of buf (>= size)
+ size_t size; ///< Conceptual size of stack in buf
+} SerdStack;
+
+/** An offset to start the stack at. Note 0 is reserved for NULL. */
+#define SERD_STACK_BOTTOM sizeof(void*)
+
+static inline SerdStack
+serd_stack_new(size_t size)
+{
+ SerdStack stack;
+ stack.buf = (uint8_t*)calloc(size, 1);
+ stack.buf_size = size;
+ stack.size = SERD_STACK_BOTTOM;
+ return stack;
+}
+
+static inline bool
+serd_stack_is_empty(SerdStack* stack)
+{
+ return stack->size <= SERD_STACK_BOTTOM;
+}
+
+static inline void
+serd_stack_free(SerdStack* stack)
+{
+ free(stack->buf);
+ stack->buf = NULL;
+ stack->buf_size = 0;
+ stack->size = 0;
+}
+
+static inline uint8_t*
+serd_stack_push(SerdStack* stack, size_t n_bytes)
+{
+ const size_t new_size = stack->size + n_bytes;
+ if (stack->buf_size < new_size) {
+ stack->buf_size += (stack->buf_size >> 1); // *= 1.5
+ stack->buf = (uint8_t*)realloc(stack->buf, stack->buf_size);
+ }
+ uint8_t* const ret = (stack->buf + stack->size);
+ stack->size = new_size;
+ return ret;
+}
+
+static inline void
+serd_stack_pop(SerdStack* stack, size_t n_bytes)
+{
+ assert(stack->size >= n_bytes);
+ stack->size -= n_bytes;
+}
+
+static inline void*
+serd_stack_push_aligned(SerdStack* stack, size_t n_bytes, size_t align)
+{
+ // Push one byte to ensure space for a pad count
+ serd_stack_push(stack, 1);
+
+ // Push padding if necessary
+ const uint8_t pad = align - stack->size % align;
+ if (pad > 0) {
+ serd_stack_push(stack, pad);
+ }
+
+ // Set top of stack to pad count so we can properly pop later
+ stack->buf[stack->size - 1] = pad;
+
+ // Push requested space at aligned location
+ return serd_stack_push(stack, n_bytes);
+}
+
+static inline void
+serd_stack_pop_aligned(SerdStack* stack, size_t n_bytes)
+{
+ // Pop requested space down to aligned location
+ serd_stack_pop(stack, n_bytes);
+
+ // Get amount of padding from top of stack
+ const uint8_t pad = stack->buf[stack->size - 1];
+
+ // Pop padding and pad count
+ serd_stack_pop(stack, pad + 1);
+}
+
+/* Byte Sink */
+
+typedef struct SerdByteSinkImpl {
+ SerdSink sink;
+ void* stream;
+ uint8_t* buf;
+ size_t size;
+ size_t block_size;
+} SerdByteSink;
+
+static inline SerdByteSink
+serd_byte_sink_new(SerdSink sink, void* stream, size_t block_size)
+{
+ SerdByteSink bsink;
+ bsink.sink = sink;
+ bsink.stream = stream;
+ bsink.size = 0;
+ bsink.block_size = block_size;
+ bsink.buf = ((block_size > 1)
+ ? (uint8_t*)serd_bufalloc(block_size)
+ : NULL);
+ return bsink;
+}
+
+static inline void
+serd_byte_sink_flush(SerdByteSink* bsink)
+{
+ if (bsink->block_size > 1 && bsink->size > 0) {
+ bsink->sink(bsink->buf, bsink->size, bsink->stream);
+ bsink->size = 0;
+ }
+}
+
+static inline void
+serd_byte_sink_free(SerdByteSink* bsink)
+{
+ serd_byte_sink_flush(bsink);
+ free(bsink->buf);
+ bsink->buf = NULL;
+}
+
+static inline size_t
+serd_byte_sink_write(const void* buf, size_t len, SerdByteSink* bsink)
+{
+ if (len == 0) {
+ return 0;
+ } else if (bsink->block_size == 1) {
+ return bsink->sink(buf, len, bsink->stream);
+ }
+
+ const size_t orig_len = len;
+ while (len) {
+ const size_t space = bsink->block_size - bsink->size;
+ const size_t n = MIN(space, len);
+
+ // Write as much as possible into the remaining buffer space
+ memcpy(bsink->buf + bsink->size, buf, n);
+ bsink->size += n;
+ buf = (const uint8_t*)buf + n;
+ len -= n;
+
+ // Flush page if buffer is full
+ if (bsink->size == bsink->block_size) {
+ bsink->sink(bsink->buf, bsink->block_size, bsink->stream);
+ bsink->size = 0;
+ }
+ }
+ return orig_len;
+}
+
+/* Character utilities */
+
+/** Return true if `c` lies within [`min`...`max`] (inclusive) */
+static inline bool
+in_range(const uint8_t c, const uint8_t min, const uint8_t max)
+{
+ return (c >= min && c <= max);
+}
+
+/** RFC2234: ALPHA ::= %x41-5A / %x61-7A ; A-Z / a-z */
+static inline bool
+is_alpha(const uint8_t c)
+{
+ return in_range(c, 'A', 'Z') || in_range(c, 'a', 'z');
+}
+
+/** RFC2234: DIGIT ::= %x30-39 ; 0-9 */
+static inline bool
+is_digit(const uint8_t c)
+{
+ return in_range(c, '0', '9');
+}
+
+/* RFC2234: HEXDIG ::= DIGIT / "A" / "B" / "C" / "D" / "E" / "F" */
+static inline bool
+is_hexdig(const uint8_t c)
+{
+ return is_digit(c) || in_range(c, 'A', 'F');
+}
+
+/* Turtle / JSON / C: XDIGIT ::= DIGIT / A-F / a-f */
+static inline bool
+is_xdigit(const uint8_t c)
+{
+ return is_hexdig(c) || in_range(c, 'a', 'f');
+}
+
+static inline bool
+is_space(const char c)
+{
+ switch (c) {
+ case ' ': case '\f': case '\n': case '\r': case '\t': case '\v':
+ return true;
+ default:
+ return false;
+ }
+}
+
+static inline bool
+is_base64(const uint8_t c)
+{
+ return is_alpha(c) || is_digit(c) || c == '+' || c == '/' || c == '=';
+}
+
+static inline bool
+is_windows_path(const uint8_t* path)
+{
+ return is_alpha(path[0]) && (path[1] == ':' || path[1] == '|')
+ && (path[2] == '/' || path[2] == '\\');
+}
+
+/* String utilities */
+
+size_t
+serd_substrlen(const uint8_t* str,
+ const size_t len,
+ size_t* n_bytes,
+ SerdNodeFlags* flags);
+
+static inline int
+serd_strncasecmp(const char* s1, const char* s2, size_t n)
+{
+ for (; n > 0 && *s2; s1++, s2++, --n) {
+ if (toupper(*s1) != toupper(*s2)) {
+ return ((*(const uint8_t*)s1 < *(const uint8_t*)s2) ? -1 : +1);
+ }
+ }
+ return 0;
+}
+
+static inline uint32_t
+utf8_num_bytes(const uint8_t c)
+{
+ if ((c & 0x80) == 0) { // Starts with `0'
+ return 1;
+ } else if ((c & 0xE0) == 0xC0) { // Starts with `110'
+ return 2;
+ } else if ((c & 0xF0) == 0xE0) { // Starts with `1110'
+ return 3;
+ } else if ((c & 0xF8) == 0xF0) { // Starts with `11110'
+ return 4;
+ }
+ return 0;
+}
+
+/// Return the code point of a UTF-8 character with known length
+static inline uint32_t
+parse_counted_utf8_char(const uint8_t* utf8, size_t size)
+{
+ uint32_t c = utf8[0] & ((1 << (8 - size)) - 1);
+ for (size_t i = 1; i < size; ++i) {
+ const uint8_t in = utf8[i] & 0x3F;
+ c = (c << 6) | in;
+ }
+ return c;
+}
+
+/// Parse a UTF-8 character, set *size to the length, and return the code point
+static inline uint32_t
+parse_utf8_char(const uint8_t* utf8, size_t* size)
+{
+ switch (*size = utf8_num_bytes(utf8[0])) {
+ case 1: case 2: case 3: case 4:
+ return parse_counted_utf8_char(utf8, *size);
+ default:
+ return *size = 0;
+ }
+}
+
+/* URI utilities */
+
+static inline bool
+chunk_equals(const SerdChunk* a, const SerdChunk* b)
+{
+ return a->len == b->len
+ && !strncmp((const char*)a->buf, (const char*)b->buf, a->len);
+}
+
+static inline size_t
+uri_path_len(const SerdURI* uri)
+{
+ return uri->path_base.len + uri->path.len;
+}
+
+static inline uint8_t
+uri_path_at(const SerdURI* uri, size_t i)
+{
+ if (i < uri->path_base.len) {
+ return uri->path_base.buf[i];
+ } else {
+ return uri->path.buf[i - uri->path_base.len];
+ }
+}
+
+/**
+ Return the index of the first differing character after the last root slash,
+ or zero if `uri` is not under `root`.
+*/
+static inline size_t
+uri_rooted_index(const SerdURI* uri, const SerdURI* root)
+{
+ if (!root || !root->scheme.len ||
+ !chunk_equals(&root->scheme, &uri->scheme) ||
+ !chunk_equals(&root->authority, &uri->authority)) {
+ return 0;
+ }
+
+ bool differ = false;
+ const size_t path_len = uri_path_len(uri);
+ const size_t root_len = uri_path_len(root);
+ size_t last_root_slash = 0;
+ for (size_t i = 0; i < path_len && i < root_len; ++i) {
+ const uint8_t u = uri_path_at(uri, i);
+ const uint8_t r = uri_path_at(root, i);
+
+ differ = differ || u != r;
+ if (r == '/') {
+ last_root_slash = i;
+ if (differ) {
+ return 0;
+ }
+ }
+ }
+
+ return last_root_slash + 1;
+}
+
+/** Return true iff `uri` shares path components with `root` */
+static inline bool
+uri_is_related(const SerdURI* uri, const SerdURI* root)
+{
+ return uri_rooted_index(uri, root) > 0;
+}
+
+/** Return true iff `uri` is within the base of `root` */
+static inline bool
+uri_is_under(const SerdURI* uri, const SerdURI* root)
+{
+ const size_t index = uri_rooted_index(uri, root);
+ return index > 0 && uri->path.len > index;
+}
+
+static inline bool
+is_uri_scheme_char(const uint8_t c)
+{
+ switch (c) {
+ case ':': case '+': case '-': case '.':
+ return true;
+ default:
+ return is_alpha(c) || is_digit(c);
+ }
+}
+
+/* Error reporting */
+
+static inline void
+serd_error(SerdErrorSink error_sink, void* handle, const SerdError* e)
+{
+ if (error_sink) {
+ error_sink(handle, e);
+ } else {
+ fprintf(stderr, "error: %s:%u:%u: ", e->filename, e->line, e->col);
+ vfprintf(stderr, e->fmt, *e->args);
+ }
+}
+
+int
+r_err(SerdReader* reader, SerdStatus st, const char* fmt, ...);
+
+/* Reader */
+
+#ifdef SERD_STACK_CHECK
+# define SERD_STACK_ASSERT_TOP(reader, ref) \
+ assert(ref == reader->allocs[reader->n_allocs - 1]);
+#else
+# define SERD_STACK_ASSERT_TOP(reader, ref)
+#endif
+
+/* Reference to a node in the stack (we can not use pointers since the
+ stack may be reallocated, invalidating any pointers to elements).
+*/
+typedef size_t Ref;
+
+typedef struct {
+ Ref graph;
+ Ref subject;
+ Ref predicate;
+ Ref object;
+ Ref datatype;
+ Ref lang;
+ SerdStatementFlags* flags;
+} ReadContext;
+
+struct SerdReaderImpl {
+ void* handle;
+ void (*free_handle)(void* ptr);
+ SerdBaseSink base_sink;
+ SerdPrefixSink prefix_sink;
+ SerdStatementSink statement_sink;
+ SerdEndSink end_sink;
+ SerdErrorSink error_sink;
+ void* error_handle;
+ Ref rdf_first;
+ Ref rdf_rest;
+ Ref rdf_nil;
+ SerdNode default_graph;
+ SerdByteSource source;
+ SerdStack stack;
+ SerdSyntax syntax;
+ unsigned next_id;
+ SerdStatus status;
+ uint8_t* buf;
+ uint8_t* bprefix;
+ size_t bprefix_len;
+ bool strict; ///< True iff strict parsing
+ bool seen_genid;
+#ifdef SERD_STACK_CHECK
+ Ref* allocs; ///< Stack of push offsets
+ size_t n_allocs; ///< Number of stack pushes
+#endif
+};
+
+Ref push_node_padded(SerdReader* reader,
+ size_t maxlen,
+ SerdType type,
+ const char* str,
+ size_t n_bytes);
+
+Ref push_node(SerdReader* reader,
+ SerdType type,
+ const char* str,
+ size_t n_bytes);
+
+size_t genid_size(SerdReader* reader);
+Ref blank_id(SerdReader* reader);
+void set_blank_id(SerdReader* reader, Ref ref, size_t buf_size);
+
+SerdNode* deref(SerdReader* reader, Ref ref);
+
+Ref pop_node(SerdReader* reader, Ref ref);
+
+bool emit_statement(SerdReader* reader, ReadContext ctx, Ref o, Ref d, Ref l);
+
+bool read_n3_statement(SerdReader* reader);
+bool read_nquadsDoc(SerdReader* reader);
+bool read_turtleTrigDoc(SerdReader* reader);
+
+typedef enum {
+ FIELD_NONE,
+ FIELD_SUBJECT,
+ FIELD_PREDICATE,
+ FIELD_OBJECT,
+ FIELD_GRAPH
+} Field;
+
+#endif // SERD_INTERNAL_H
diff --git a/src/serdi.c b/src/serdi.c
new file mode 100644
index 00000000..16767ffd
--- /dev/null
+++ b/src/serdi.c
@@ -0,0 +1,307 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define SERDI_ERROR(msg) fprintf(stderr, "serdi: " msg);
+#define SERDI_ERRORF(fmt, ...) fprintf(stderr, "serdi: " fmt, __VA_ARGS__);
+
+typedef struct {
+ SerdSyntax syntax;
+ const char* name;
+ const char* extension;
+} Syntax;
+
+static const Syntax syntaxes[] = {
+ {SERD_TURTLE, "turtle", ".ttl"},
+ {SERD_NTRIPLES, "ntriples", ".nt"},
+ {SERD_NQUADS, "nquads", ".nq"},
+ {SERD_TRIG, "trig", ".trig"},
+ {(SerdSyntax)0, NULL, NULL}
+};
+
+static SerdSyntax
+get_syntax(const char* name)
+{
+ for (const Syntax* s = syntaxes; s->name; ++s) {
+ if (!serd_strncasecmp(s->name, name, strlen(name))) {
+ return s->syntax;
+ }
+ }
+ SERDI_ERRORF("unknown syntax `%s'\n", name);
+ return (SerdSyntax)0;
+}
+
+static SerdSyntax
+guess_syntax(const char* filename)
+{
+ const char* ext = strrchr(filename, '.');
+ if (ext) {
+ for (const Syntax* s = syntaxes; s->name; ++s) {
+ if (!serd_strncasecmp(s->extension, ext, strlen(ext))) {
+ return s->syntax;
+ }
+ }
+ }
+ return (SerdSyntax)0;
+}
+
+static int
+print_version(void)
+{
+ printf("serdi " SERD_VERSION " <http://drobilla.net/software/serd>\n");
+ printf("Copyright 2011-2017 David Robillard <http://drobilla.net>.\n"
+ "License: <http://www.opensource.org/licenses/isc>\n"
+ "This is free software; you are free to change and redistribute it."
+ "\nThere is NO WARRANTY, to the extent permitted by law.\n");
+ return 0;
+}
+
+static int
+print_usage(const char* name, bool error)
+{
+ FILE* const os = error ? stderr : stdout;
+ fprintf(os, "%s", error ? "\n" : "");
+ fprintf(os, "Usage: %s [OPTION]... INPUT [BASE_URI]\n", name);
+ fprintf(os, "Read and write RDF syntax.\n");
+ fprintf(os, "Use - for INPUT to read from standard input.\n\n");
+ fprintf(os, " -a Write ASCII output if possible.\n");
+ fprintf(os, " -b Fast bulk output for large serialisations.\n");
+ fprintf(os, " -c PREFIX Chop PREFIX from matching blank node IDs.\n");
+ fprintf(os, " -e Eat input one character at a time.\n");
+ fprintf(os, " -f Keep full URIs in input (don't qualify).\n");
+ fprintf(os, " -h Display this help and exit.\n");
+ fprintf(os, " -i SYNTAX Input syntax: turtle/ntriples/trig/nquads.\n");
+ fprintf(os, " -l Lax (non-strict) parsing.\n");
+ fprintf(os, " -o SYNTAX Output syntax: turtle/ntriples/nquads.\n");
+ fprintf(os, " -p PREFIX Add PREFIX to blank node IDs.\n");
+ fprintf(os, " -q Suppress all output except data.\n");
+ fprintf(os, " -r ROOT_URI Keep relative URIs within ROOT_URI.\n");
+ fprintf(os, " -s INPUT Parse INPUT as string (terminates options).\n");
+ fprintf(os, " -v Display version information and exit.\n");
+ return error ? 1 : 0;
+}
+
+static int
+missing_arg(const char* name, char opt)
+{
+ SERDI_ERRORF("option requires an argument -- '%c'\n", opt);
+ return print_usage(name, true);
+}
+
+static SerdStatus
+quiet_error_sink(void* handle, const SerdError* e)
+{
+ return SERD_SUCCESS;
+}
+
+int
+main(int argc, char** argv)
+{
+ if (argc < 2) {
+ return print_usage(argv[0], true);
+ }
+
+ FILE* in_fd = NULL;
+ SerdSyntax input_syntax = (SerdSyntax)0;
+ SerdSyntax output_syntax = (SerdSyntax)0;
+ bool from_file = true;
+ bool ascii = false;
+ bool bulk_read = true;
+ bool bulk_write = false;
+ bool full_uris = false;
+ bool lax = false;
+ bool quiet = false;
+ const uint8_t* in_name = NULL;
+ const uint8_t* add_prefix = NULL;
+ const uint8_t* chop_prefix = NULL;
+ const uint8_t* root_uri = NULL;
+ int a = 1;
+ for (; a < argc && argv[a][0] == '-'; ++a) {
+ if (argv[a][1] == '\0') {
+ in_name = (const uint8_t*)"(stdin)";
+ in_fd = stdin;
+ break;
+ } else if (argv[a][1] == 'a') {
+ ascii = true;
+ } else if (argv[a][1] == 'b') {
+ bulk_write = true;
+ } else if (argv[a][1] == 'e') {
+ bulk_read = false;
+ } else if (argv[a][1] == 'f') {
+ full_uris = true;
+ } else if (argv[a][1] == 'h') {
+ return print_usage(argv[0], false);
+ } else if (argv[a][1] == 'l') {
+ lax = true;
+ } else if (argv[a][1] == 'q') {
+ quiet = true;
+ } else if (argv[a][1] == 'v') {
+ return print_version();
+ } else if (argv[a][1] == 's') {
+ in_name = (const uint8_t*)"(string)";
+ from_file = false;
+ ++a;
+ break;
+ } else if (argv[a][1] == 'i') {
+ if (++a == argc) {
+ return missing_arg(argv[0], 'i');
+ } else if (!(input_syntax = get_syntax(argv[a]))) {
+ return print_usage(argv[0], true);
+ }
+ } else if (argv[a][1] == 'o') {
+ if (++a == argc) {
+ return missing_arg(argv[0], 'o');
+ } else if (!(output_syntax = get_syntax(argv[a]))) {
+ return print_usage(argv[0], true);
+ }
+ } else if (argv[a][1] == 'p') {
+ if (++a == argc) {
+ return missing_arg(argv[0], 'p');
+ }
+ add_prefix = (const uint8_t*)argv[a];
+ } else if (argv[a][1] == 'c') {
+ if (++a == argc) {
+ return missing_arg(argv[0], 'c');
+ }
+ chop_prefix = (const uint8_t*)argv[a];
+ } else if (argv[a][1] == 'r') {
+ if (++a == argc) {
+ return missing_arg(argv[0], 'r');
+ }
+ root_uri = (const uint8_t*)argv[a];
+ } else {
+ SERDI_ERRORF("invalid option -- '%s'\n", argv[a] + 1);
+ return print_usage(argv[0], true);
+ }
+ }
+
+ if (a == argc) {
+ SERDI_ERROR("missing input\n");
+ return 1;
+ }
+
+ const uint8_t* input = (const uint8_t*)argv[a++];
+ if (from_file) {
+ in_name = in_name ? in_name : input;
+ if (!in_fd) {
+ input = serd_uri_to_path(in_name);
+ if (!input || !(in_fd = serd_fopen((const char*)input, "rb"))) {
+ return 1;
+ }
+ }
+ }
+
+ if (!input_syntax && !(input_syntax = guess_syntax((const char*)in_name))) {
+ input_syntax = SERD_TRIG;
+ }
+
+ if (!output_syntax) {
+ output_syntax = (
+ (input_syntax == SERD_TURTLE || input_syntax == SERD_NTRIPLES)
+ ? SERD_NTRIPLES
+ : SERD_NQUADS);
+ }
+
+ SerdURI base_uri = SERD_URI_NULL;
+ SerdNode base = SERD_NODE_NULL;
+ if (a < argc) { // Base URI given on command line
+ base = serd_node_new_uri_from_string(
+ (const uint8_t*)argv[a], NULL, &base_uri);
+ } else if (from_file && in_fd != stdin) { // Use input file URI
+ base = serd_node_new_file_uri(input, NULL, &base_uri, true);
+ }
+
+ FILE* out_fd = stdout;
+ SerdEnv* env = serd_env_new(&base);
+
+ int output_style = 0;
+ if (output_syntax == SERD_NTRIPLES || ascii) {
+ output_style |= SERD_STYLE_ASCII;
+ } else if (output_syntax == SERD_TURTLE) {
+ output_style |= SERD_STYLE_ABBREVIATED;
+ if (!full_uris) {
+ output_style |= SERD_STYLE_CURIED;
+ }
+ }
+
+ if ((input_syntax == SERD_TURTLE || input_syntax == SERD_TRIG) ||
+ (output_style & SERD_STYLE_CURIED)) {
+ // Base URI may change and/or we're abbreviating URIs, so must resolve
+ output_style |= SERD_STYLE_RESOLVED;
+ }
+
+ if (bulk_write) {
+ output_style |= SERD_STYLE_BULK;
+ }
+
+ SerdWriter* writer = serd_writer_new(
+ output_syntax, (SerdStyle)output_style,
+ env, &base_uri, serd_file_sink, out_fd);
+
+ SerdReader* reader = serd_reader_new(
+ input_syntax, writer, NULL,
+ (SerdBaseSink)serd_writer_set_base_uri,
+ (SerdPrefixSink)serd_writer_set_prefix,
+ (SerdStatementSink)serd_writer_write_statement,
+ (SerdEndSink)serd_writer_end_anon);
+
+ serd_reader_set_strict(reader, !lax);
+ if (quiet) {
+ serd_reader_set_error_sink(reader, quiet_error_sink, NULL);
+ serd_writer_set_error_sink(writer, quiet_error_sink, NULL);
+ }
+
+ SerdNode root = serd_node_from_string(SERD_URI, root_uri);
+ serd_writer_set_root_uri(writer, &root);
+ serd_writer_chop_blank_prefix(writer, chop_prefix);
+ serd_reader_add_blank_prefix(reader, add_prefix);
+
+ SerdStatus status = SERD_SUCCESS;
+ if (!from_file) {
+ status = serd_reader_read_string(reader, input);
+ } else if (bulk_read) {
+ status = serd_reader_read_file_handle(reader, in_fd, in_name);
+ } else {
+ status = serd_reader_start_stream(reader, in_fd, in_name, false);
+ while (!status) {
+ status = serd_reader_read_chunk(reader);
+ }
+ serd_reader_end_stream(reader);
+ }
+
+ serd_reader_free(reader);
+ serd_writer_finish(writer);
+ serd_writer_free(writer);
+ serd_env_free(env);
+ serd_node_free(&base);
+
+ if (from_file) {
+ fclose(in_fd);
+ }
+
+ if (fclose(out_fd)) {
+ perror("serdi: write error");
+ status = SERD_ERR_UNKNOWN;
+ }
+
+ return (status > SERD_FAILURE) ? 1 : 0;
+}
diff --git a/src/string.c b/src/string.c
new file mode 100644
index 00000000..cde82134
--- /dev/null
+++ b/src/string.c
@@ -0,0 +1,204 @@
+/*
+ Copyright 2011-2016 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <math.h>
+
+void
+serd_free(void* ptr)
+{
+ free(ptr);
+}
+
+const uint8_t*
+serd_strerror(SerdStatus status)
+{
+ switch (status) {
+ case SERD_SUCCESS: return (const uint8_t*)"Success";
+ case SERD_FAILURE: return (const uint8_t*)"Non-fatal failure";
+ case SERD_ERR_UNKNOWN: return (const uint8_t*)"Unknown error";
+ case SERD_ERR_BAD_SYNTAX: return (const uint8_t*)"Invalid syntax";
+ case SERD_ERR_BAD_ARG: return (const uint8_t*)"Invalid argument";
+ case SERD_ERR_NOT_FOUND: return (const uint8_t*)"Not found";
+ case SERD_ERR_ID_CLASH: return (const uint8_t*)"Blank node ID clash";
+ case SERD_ERR_BAD_CURIE: return (const uint8_t*)"Invalid CURIE";
+ case SERD_ERR_INTERNAL: return (const uint8_t*)"Internal error";
+ }
+ return (const uint8_t*)"Unknown error"; // never reached
+}
+
+static inline void
+serd_update_flags(const uint8_t c, SerdNodeFlags* const flags)
+{
+ switch (c) {
+ case '\r': case '\n':
+ *flags |= SERD_HAS_NEWLINE;
+ break;
+ case '"':
+ *flags |= SERD_HAS_QUOTE;
+ }
+}
+
+size_t
+serd_substrlen(const uint8_t* const str,
+ const size_t len,
+ size_t* const n_bytes,
+ SerdNodeFlags* const flags)
+{
+ size_t n_chars = 0;
+ size_t i = 0;
+ SerdNodeFlags f = 0;
+ for (; i < len && str[i]; ++i) {
+ if ((str[i] & 0xC0) != 0x80) { // Start of new character
+ ++n_chars;
+ serd_update_flags(str[i], &f);
+ }
+ }
+ if (n_bytes) {
+ *n_bytes = i;
+ }
+ if (flags) {
+ *flags = f;
+ }
+ return n_chars;
+}
+
+size_t
+serd_strlen(const uint8_t* str, size_t* n_bytes, SerdNodeFlags* flags)
+{
+ size_t n_chars = 0;
+ size_t i = 0;
+ SerdNodeFlags f = 0;
+ for (; str[i]; ++i) {
+ if ((str[i] & 0xC0) != 0x80) { // Start of new character
+ ++n_chars;
+ serd_update_flags(str[i], &f);
+ }
+ }
+ if (n_bytes) {
+ *n_bytes = i;
+ }
+ if (flags) {
+ *flags = f;
+ }
+ return n_chars;
+}
+
+static inline double
+read_sign(const char** sptr)
+{
+ double sign = 1.0;
+ switch (**sptr) {
+ case '-':
+ sign = -1.0;
+ // fallthru
+ case '+':
+ ++(*sptr);
+ // fallthru
+ default:
+ return sign;
+ }
+}
+
+double
+serd_strtod(const char* str, char** endptr)
+{
+ double result = 0.0;
+
+ // Point s at the first non-whitespace character
+ const char* s = str;
+ while (is_space(*s)) { ++s; }
+
+ // Read leading sign if necessary
+ const double sign = read_sign(&s);
+
+ // Parse integer part
+ for (; is_digit(*s); ++s) {
+ result = (result * 10.0) + (*s - '0');
+ }
+
+ // Parse fractional part
+ if (*s == '.') {
+ double denom = 10.0;
+ for (++s; is_digit(*s); ++s) {
+ result += (*s - '0') / denom;
+ denom *= 10.0;
+ }
+ }
+
+ // Parse exponent
+ if (*s == 'e' || *s == 'E') {
+ ++s;
+ double expt = 0.0;
+ double expt_sign = read_sign(&s);
+ for (; is_digit(*s); ++s) {
+ expt = (expt * 10.0) + (*s - '0');
+ }
+ result *= pow(10, expt * expt_sign);
+ }
+
+ if (endptr) {
+ *endptr = (char*)s;
+ }
+
+ return result * sign;
+}
+
+/**
+ Base64 decoding table.
+ This is indexed by encoded characters and returns the numeric value used
+ for decoding, shifted up by 47 to be in the range of printable ASCII.
+ A '$' is a placeholder for characters not in the base64 alphabet.
+*/
+static const char b64_unmap[] =
+ "$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$m$$$ncdefghijkl$$$$$$"
+ "$/0123456789:;<=>?@ABCDEFGH$$$$$$IJKLMNOPQRSTUVWXYZ[\\]^_`ab$$$$"
+ "$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$"
+ "$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$";
+
+static inline uint8_t unmap(const uint8_t in) { return b64_unmap[in] - 47; }
+
+/**
+ Decode 4 base64 characters to 3 raw bytes.
+*/
+static inline size_t
+decode_chunk(const uint8_t in[4], uint8_t out[3])
+{
+ out[0] = (uint8_t)(((unmap(in[0]) << 2)) | unmap(in[1]) >> 4);
+ out[1] = (uint8_t)(((unmap(in[1]) << 4) & 0xF0) | unmap(in[2]) >> 2);
+ out[2] = (uint8_t)(((unmap(in[2]) << 6) & 0xC0) | unmap(in[3]));
+ return 1 + (in[2] != '=') + ((in[2] != '=') && (in[3] != '='));
+}
+
+void*
+serd_base64_decode(const uint8_t* str, size_t len, size_t* size)
+{
+ void* buf = malloc((len * 3) / 4 + 2);
+ *size = 0;
+ for (size_t i = 0, j = 0; i < len; j += 3) {
+ uint8_t in[] = "====";
+ size_t n_in = 0;
+ for (; i < len && n_in < 4; ++n_in) {
+ for (; i < len && !is_base64(str[i]); ++i) {} // Skip junk
+ in[n_in] = str[i++];
+ }
+ if (n_in > 1) {
+ *size += decode_chunk(in, (uint8_t*)buf + j);
+ }
+ }
+ return buf;
+}
diff --git a/src/uri.c b/src/uri.c
new file mode 100644
index 00000000..70b13717
--- /dev/null
+++ b/src/uri.c
@@ -0,0 +1,510 @@
+/*
+ Copyright 2011-2014 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+// #define URI_DEBUG 1
+
+const uint8_t*
+serd_uri_to_path(const uint8_t* uri)
+{
+ const uint8_t* path = uri;
+ if (!is_windows_path(uri) && serd_uri_string_has_scheme(uri)) {
+ if (strncmp((const char*)uri, "file:", 5)) {
+ fprintf(stderr, "Non-file URI `%s'\n", uri);
+ return NULL;
+ } else if (!strncmp((const char*)uri, "file://localhost/", 17)) {
+ path = uri + 16;
+ } else if (!strncmp((const char*)uri, "file://", 7)) {
+ path = uri + 7;
+ } else {
+ fprintf(stderr, "Invalid file URI `%s'\n", uri);
+ return NULL;
+ }
+ if (is_windows_path(path + 1)) {
+ ++path; // Special case for terrible Windows file URIs
+ }
+ }
+ return path;
+}
+
+uint8_t*
+serd_file_uri_parse(const uint8_t* uri, uint8_t** hostname)
+{
+ const uint8_t* path = uri;
+ if (hostname) {
+ *hostname = NULL;
+ }
+ if (!strncmp((const char*)uri, "file://", 7)) {
+ const uint8_t* auth = uri + 7;
+ if (*auth == '/') { // No hostname
+ path = auth;
+ } else { // Has hostname
+ if (!(path = (const uint8_t*)strchr((const char*)auth, '/'))) {
+ return NULL;
+ }
+ if (hostname) {
+ *hostname = (uint8_t*)calloc(path - auth + 1, 1);
+ memcpy(*hostname, auth, path - auth);
+ }
+ }
+ }
+
+ if (is_windows_path(path + 1)) {
+ ++path;
+ }
+
+ SerdChunk chunk = { NULL, 0 };
+ for (const uint8_t* s = path; *s; ++s) {
+ if (*s == '%') {
+ if (*(s + 1) == '%') {
+ serd_chunk_sink("%", 1, &chunk);
+ ++s;
+ } else if (is_hexdig(*(s + 1)) && is_hexdig(*(s + 2))) {
+ const uint8_t code[3] = {*(s + 1), *(s + 2), 0};
+ const uint8_t c = (uint8_t)strtoul((const char*)code, NULL, 16);
+ serd_chunk_sink(&c, 1, &chunk);
+ s += 2;
+ } else {
+ s += 2; // Junk escape, ignore
+ }
+ } else {
+ serd_chunk_sink(s, 1, &chunk);
+ }
+ }
+ return serd_chunk_sink_finish(&chunk);
+}
+
+bool
+serd_uri_string_has_scheme(const uint8_t* utf8)
+{
+ // RFC3986: scheme ::= ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
+ if (!utf8 || !is_alpha(utf8[0])) {
+ return false; // Invalid scheme initial character, URI is relative
+ }
+
+ for (uint8_t c; (c = *++utf8) != '\0';) {
+ if (!is_uri_scheme_char(c)) {
+ return false;
+ } else if (c == ':') {
+ return true; // End of scheme
+ }
+ }
+
+ return false;
+}
+
+#ifdef URI_DEBUG
+static void
+serd_uri_dump(const SerdURI* uri, FILE* file)
+{
+#define PRINT_PART(range, name) \
+ if (range.buf) { \
+ fprintf(stderr, " " name " = "); \
+ fwrite((range).buf, 1, (range).len, stderr); \
+ fprintf(stderr, "\n"); \
+ }
+
+ PRINT_PART(uri->scheme, "scheme ");
+ PRINT_PART(uri->authority, "authority");
+ PRINT_PART(uri->path_base, "path_base");
+ PRINT_PART(uri->path, "path ");
+ PRINT_PART(uri->query, "query ");
+ PRINT_PART(uri->fragment, "fragment ");
+}
+#endif
+
+SerdStatus
+serd_uri_parse(const uint8_t* utf8, SerdURI* out)
+{
+ *out = SERD_URI_NULL;
+
+ const uint8_t* ptr = utf8;
+
+ /* See http://tools.ietf.org/html/rfc3986#section-3
+ URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
+ */
+
+ /* S3.1: scheme ::= ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) */
+ if (is_alpha(*ptr)) {
+ for (uint8_t c = *++ptr; true; c = *++ptr) {
+ switch (c) {
+ case '\0': case '/': case '?': case '#':
+ ptr = utf8;
+ goto path; // Relative URI (starts with path by definition)
+ case ':':
+ out->scheme.buf = utf8;
+ out->scheme.len = (ptr++) - utf8;
+ goto maybe_authority; // URI with scheme
+ case '+': case '-': case '.':
+ continue;
+ default:
+ if (is_alpha(c) || is_digit(c)) {
+ continue;
+ }
+ }
+ }
+ }
+
+ /* S3.2: The authority component is preceded by a double slash ("//")
+ and is terminated by the next slash ("/"), question mark ("?"),
+ or number sign ("#") character, or by the end of the URI.
+ */
+maybe_authority:
+ if (*ptr == '/' && *(ptr + 1) == '/') {
+ ptr += 2;
+ out->authority.buf = ptr;
+ for (uint8_t c; (c = *ptr) != '\0'; ++ptr) {
+ switch (c) {
+ case '/': goto path;
+ case '?': goto query;
+ case '#': goto fragment;
+ default:
+ ++out->authority.len;
+ }
+ }
+ }
+
+ /* RFC3986 S3.3: The path is terminated by the first question mark ("?")
+ or number sign ("#") character, or by the end of the URI.
+ */
+path:
+ switch (*ptr) {
+ case '?': goto query;
+ case '#': goto fragment;
+ case '\0': goto end;
+ default: break;
+ }
+ out->path.buf = ptr;
+ out->path.len = 0;
+ for (uint8_t c; (c = *ptr) != '\0'; ++ptr) {
+ switch (c) {
+ case '?': goto query;
+ case '#': goto fragment;
+ default:
+ ++out->path.len;
+ }
+ }
+
+ /* RFC3986 S3.4: The query component is indicated by the first question
+ mark ("?") character and terminated by a number sign ("#") character
+ or by the end of the URI.
+ */
+query:
+ if (*ptr == '?') {
+ out->query.buf = ++ptr;
+ for (uint8_t c; (c = *ptr) != '\0'; ++ptr) {
+ switch (c) {
+ case '#':
+ goto fragment;
+ default:
+ ++out->query.len;
+ }
+ }
+ }
+
+ /* RFC3986 S3.5: A fragment identifier component is indicated by the
+ presence of a number sign ("#") character and terminated by the end
+ of the URI.
+ */
+fragment:
+ if (*ptr == '#') {
+ out->fragment.buf = ptr;
+ while (*ptr++ != '\0') {
+ ++out->fragment.len;
+ }
+ }
+
+end:
+ #ifdef URI_DEBUG
+ fprintf(stderr, "PARSE URI <%s>\n", utf8);
+ serd_uri_dump(out, stderr);
+ fprintf(stderr, "\n");
+ #endif
+
+ return SERD_SUCCESS;
+}
+
+/**
+ Remove leading dot components from `path`.
+ See http://tools.ietf.org/html/rfc3986#section-5.2.3
+ @param up Set to the number of up-references (e.g. "../") trimmed
+ @return A pointer to the new start of `path`
+*/
+static const uint8_t*
+remove_dot_segments(const uint8_t* path, size_t len, size_t* up)
+{
+ const uint8_t* begin = path;
+ const uint8_t* const end = path + len;
+
+ *up = 0;
+ while (begin < end) {
+ switch (begin[0]) {
+ case '.':
+ switch (begin[1]) {
+ case '/':
+ begin += 2; // Chop leading "./"
+ break;
+ case '.':
+ switch (begin[2]) {
+ case '\0':
+ ++*up;
+ begin += 2; // Chop input ".."
+ break;
+ case '/':
+ ++*up;
+ begin += 3; // Chop leading "../"
+ break;
+ default:
+ return begin;
+ }
+ break;
+ case '\0':
+ ++begin; // Chop input "."
+ // fallthru
+ default:
+ return begin;
+ }
+ break;
+ case '/':
+ switch (begin[1]) {
+ case '.':
+ switch (begin[2]) {
+ case '/':
+ begin += 2; // Leading "/./" => "/"
+ break;
+ case '.':
+ switch (begin[3]) {
+ case '/':
+ ++*up;
+ begin += 3; // Leading "/../" => "/"
+ }
+ break;
+ default:
+ return begin;
+ }
+ } // else fall through
+ default:
+ return begin; // Finished chopping dot components
+ }
+ }
+
+ return begin;
+}
+
+/// Merge `base` and `path` in-place
+static void
+merge(SerdChunk* base, SerdChunk* path)
+{
+ size_t up;
+ const uint8_t* begin = remove_dot_segments(path->buf, path->len, &up);
+ const uint8_t* end = path->buf + path->len;
+
+ if (base->len) {
+ // Find the up'th last slash
+ const uint8_t* base_last = (base->buf + base->len - 1);
+ ++up;
+ do {
+ if (*base_last == '/') {
+ --up;
+ }
+ } while (up > 0 && (--base_last > base->buf));
+
+ // Set path prefix
+ base->len = base_last - base->buf + 1;
+ }
+
+ // Set path suffix
+ path->buf = begin;
+ path->len = end - begin;
+}
+
+/// See http://tools.ietf.org/html/rfc3986#section-5.2.2
+void
+serd_uri_resolve(const SerdURI* r, const SerdURI* base, SerdURI* t)
+{
+ if (!base->scheme.len) {
+ *t = *r; // Don't resolve against non-absolute URIs
+ return;
+ }
+
+ t->path_base.buf = NULL;
+ t->path_base.len = 0;
+ if (r->scheme.len) {
+ *t = *r;
+ } else {
+ if (r->authority.len) {
+ t->authority = r->authority;
+ t->path = r->path;
+ t->query = r->query;
+ } else {
+ t->path = r->path;
+ if (!r->path.len) {
+ t->path_base = base->path;
+ if (r->query.len) {
+ t->query = r->query;
+ } else {
+ t->query = base->query;
+ }
+ } else {
+ if (r->path.buf[0] != '/') {
+ t->path_base = base->path;
+ }
+ merge(&t->path_base, &t->path);
+ t->query = r->query;
+ }
+ t->authority = base->authority;
+ }
+ t->scheme = base->scheme;
+ t->fragment = r->fragment;
+ }
+
+ #ifdef URI_DEBUG
+ fprintf(stderr, "## RESOLVE URI\n# BASE\n");
+ serd_uri_dump(base, stderr);
+ fprintf(stderr, "# URI\n");
+ serd_uri_dump(r, stderr);
+ fprintf(stderr, "# RESULT\n");
+ serd_uri_dump(t, stderr);
+ fprintf(stderr, "\n");
+ #endif
+}
+
+/** Write the path of `uri` starting at index `i` */
+static size_t
+write_path_tail(SerdSink sink, void* stream, const SerdURI* uri, size_t i)
+{
+ size_t len = 0;
+ if (i < uri->path_base.len) {
+ len += sink(uri->path_base.buf + i, uri->path_base.len - i, stream);
+ }
+ if (uri->path.buf) {
+ if (i < uri->path_base.len) {
+ len += sink(uri->path.buf, uri->path.len, stream);
+ } else {
+ const size_t j = (i - uri->path_base.len);
+ len += sink(uri->path.buf + j, uri->path.len - j, stream);
+ }
+ }
+ return len;
+}
+
+/** Write the path of `uri` relative to the path of `base`. */
+static size_t
+write_rel_path(SerdSink sink,
+ void* stream,
+ const SerdURI* uri,
+ const SerdURI* base)
+{
+ const size_t path_len = uri_path_len(uri);
+ const size_t base_len = uri_path_len(base);
+ const size_t min_len = (path_len < base_len) ? path_len : base_len;
+
+ // Find the last separator common to both paths
+ size_t last_shared_sep = 0;
+ size_t i = 0;
+ for (; i < min_len && uri_path_at(uri, i) == uri_path_at(base, i); ++i) {
+ if (uri_path_at(uri, i) == '/') {
+ last_shared_sep = i;
+ }
+ }
+
+ if (i == path_len && i == base_len) { // Paths are identical
+ return 0;
+ }
+
+ // Find the number of up references ("..") required
+ size_t up = 0;
+ for (size_t s = last_shared_sep + 1; s < base_len; ++s) {
+ if (uri_path_at(base, s) == '/') {
+ ++up;
+ }
+ }
+
+ // Write up references
+ size_t len = 0;
+ for (size_t u = 0; u < up; ++u) {
+ len += sink("../", 3, stream);
+ }
+
+ if (last_shared_sep == 0 && up == 0) {
+ len += sink("/", 1, stream);
+ }
+
+ // Write suffix
+ return len += write_path_tail(sink, stream, uri, last_shared_sep + 1);
+}
+
+static uint8_t
+serd_uri_path_starts_without_slash(const SerdURI* uri)
+{
+ return ((uri->path_base.len || uri->path.len) &&
+ ((!uri->path_base.len || uri->path_base.buf[0] != '/') &&
+ (!uri->path.len || uri->path.buf[0] != '/')));
+}
+
+/// See http://tools.ietf.org/html/rfc3986#section-5.3
+size_t
+serd_uri_serialise_relative(const SerdURI* uri,
+ const SerdURI* base,
+ const SerdURI* root,
+ SerdSink sink,
+ void* stream)
+{
+ size_t len = 0;
+ const bool relative =
+ root ? uri_is_under(uri, root) : uri_is_related(uri, base);
+
+ if (relative) {
+ len = write_rel_path(sink, stream, uri, base);
+ }
+ if (!relative || (!len && base->query.buf)) {
+ if (uri->scheme.buf) {
+ len += sink(uri->scheme.buf, uri->scheme.len, stream);
+ len += sink(":", 1, stream);
+ }
+ if (uri->authority.buf) {
+ len += sink("//", 2, stream);
+ len += sink(uri->authority.buf, uri->authority.len, stream);
+ if (uri->authority.buf[uri->authority.len - 1] != '/' &&
+ serd_uri_path_starts_without_slash(uri)) {
+ // Special case: ensure path begins with a slash
+ // https://tools.ietf.org/html/rfc3986#section-3.2
+ len += sink("/", 1, stream);
+ }
+ }
+ len += write_path_tail(sink, stream, uri, 0);
+ }
+ if (uri->query.buf) {
+ len += sink("?", 1, stream);
+ len += sink(uri->query.buf, uri->query.len, stream);
+ }
+ if (uri->fragment.buf) {
+ // Note uri->fragment.buf includes the leading `#'
+ len += sink(uri->fragment.buf, uri->fragment.len, stream);
+ }
+ return len;
+}
+
+/// See http://tools.ietf.org/html/rfc3986#section-5.3
+size_t
+serd_uri_serialise(const SerdURI* uri, SerdSink sink, void* stream)
+{
+ return serd_uri_serialise_relative(uri, NULL, NULL, sink, stream);
+}
diff --git a/src/writer.c b/src/writer.c
new file mode 100644
index 00000000..69a00d82
--- /dev/null
+++ b/src/writer.c
@@ -0,0 +1,994 @@
+/*
+ Copyright 2011-2017 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "serd_internal.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct {
+ SerdNode graph;
+ SerdNode subject;
+ SerdNode predicate;
+} WriteContext;
+
+static const WriteContext WRITE_CONTEXT_NULL = {
+ { 0, 0, 0, 0, SERD_NOTHING },
+ { 0, 0, 0, 0, SERD_NOTHING },
+ { 0, 0, 0, 0, SERD_NOTHING }
+};
+
+typedef enum {
+ SEP_NONE,
+ SEP_END_S, ///< End of a subject ('.')
+ SEP_END_P, ///< End of a predicate (';')
+ SEP_END_O, ///< End of an object (',')
+ SEP_S_P, ///< Between a subject and predicate (whitespace)
+ SEP_P_O, ///< Between a predicate and object (whitespace)
+ SEP_ANON_BEGIN, ///< Start of anonymous node ('[')
+ SEP_ANON_END, ///< End of anonymous node (']')
+ SEP_LIST_BEGIN, ///< Start of list ('(')
+ SEP_LIST_SEP, ///< List separator (whitespace)
+ SEP_LIST_END, ///< End of list (')')
+ SEP_GRAPH_BEGIN, ///< Start of graph ('{')
+ SEP_GRAPH_END, ///< End of graph ('}')
+ SEP_URI_BEGIN, ///< URI start quote ('<')
+ SEP_URI_END ///< URI end quote ('>')
+} Sep;
+
+typedef struct {
+ const char* str; ///< Sep string
+ uint8_t len; ///< Length of sep string
+ uint8_t space_before; ///< Newline before sep
+ uint8_t space_after_node; ///< Newline after sep if after node
+ uint8_t space_after_sep; ///< Newline after sep if after sep
+} SepRule;
+
+static const SepRule rules[] = {
+ { NULL, 0, 0, 0, 0 },
+ { " .\n\n", 4, 0, 0, 0 },
+ { " ;", 2, 0, 1, 1 },
+ { " ,", 2, 0, 1, 0 },
+ { NULL, 0, 0, 1, 0 },
+ { " ", 1, 0, 0, 0 },
+ { "[", 1, 0, 1, 1 },
+ { "]", 1, 1, 0, 0 },
+ { "(", 1, 0, 0, 0 },
+ { NULL, 1, 0, 1, 0 },
+ { ")", 1, 1, 0, 0 },
+ { " {", 2, 0, 1, 1 },
+ { " }", 2, 0, 1, 1 },
+ { "<", 1, 0, 0, 0 },
+ { ">", 1, 0, 0, 0 },
+ { "\n", 1, 0, 1, 0 }
+};
+
+struct SerdWriterImpl {
+ SerdSyntax syntax;
+ SerdStyle style;
+ SerdEnv* env;
+ SerdNode root_node;
+ SerdURI root_uri;
+ SerdURI base_uri;
+ SerdStack anon_stack;
+ SerdByteSink byte_sink;
+ SerdErrorSink error_sink;
+ void* error_handle;
+ WriteContext context;
+ SerdNode list_subj;
+ unsigned list_depth;
+ unsigned indent;
+ uint8_t* bprefix;
+ size_t bprefix_len;
+ Sep last_sep;
+ bool empty;
+};
+
+typedef enum {
+ WRITE_STRING,
+ WRITE_LONG_STRING
+} TextContext;
+
+static bool
+write_node(SerdWriter* writer,
+ const SerdNode* node,
+ const SerdNode* datatype,
+ const SerdNode* lang,
+ Field field,
+ SerdStatementFlags flags);
+
+static bool
+supports_abbrev(const SerdWriter* writer)
+{
+ return writer->syntax == SERD_TURTLE || writer->syntax == SERD_TRIG;
+}
+
+static void
+w_err(SerdWriter* writer, SerdStatus st, const char* fmt, ...)
+{
+ /* TODO: This results in errors with no file information, which is not
+ helpful when re-serializing a file (particularly for "undefined
+ namespace prefix" errors. The statement sink API needs to be changed to
+ add a Cursor parameter so the source can notify the writer of the
+ statement origin for better error reporting. */
+
+ va_list args;
+ va_start(args, fmt);
+ const SerdError e = { st, NULL, 0, 0, fmt, &args };
+ serd_error(writer->error_sink, writer->error_handle, &e);
+ va_end(args);
+}
+
+static inline WriteContext*
+anon_stack_top(SerdWriter* writer)
+{
+ assert(!serd_stack_is_empty(&writer->anon_stack));
+ return (WriteContext*)(writer->anon_stack.buf
+ + writer->anon_stack.size - sizeof(WriteContext));
+}
+
+static void
+copy_node(SerdNode* dst, const SerdNode* src)
+{
+ if (src) {
+ dst->buf = (uint8_t*)realloc((char*)dst->buf, src->n_bytes + 1);
+ dst->n_bytes = src->n_bytes;
+ dst->n_chars = src->n_chars;
+ dst->flags = src->flags;
+ dst->type = src->type;
+ memcpy((char*)dst->buf, src->buf, src->n_bytes + 1);
+ } else {
+ dst->type = SERD_NOTHING;
+ }
+}
+
+static inline size_t
+sink(const void* buf, size_t len, SerdWriter* writer)
+{
+ return serd_byte_sink_write(buf, len, &writer->byte_sink);
+}
+
+// Write a single character, as an escape for single byte characters
+// (Caller prints any single byte characters that don't need escaping)
+static size_t
+write_character(SerdWriter* writer, const uint8_t* utf8, size_t* size)
+{
+ char escape[11] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+ const uint32_t c = parse_utf8_char(utf8, size);
+ switch (*size) {
+ case 0:
+ w_err(writer, SERD_ERR_BAD_ARG, "invalid UTF-8: %X\n", utf8[0]);
+ return sink(replacement_char, sizeof(replacement_char), writer);
+ case 1:
+ snprintf(escape, sizeof(escape), "\\u%04X", utf8[0]);
+ return sink(escape, 6, writer);
+ default:
+ break;
+ }
+
+ if (!(writer->style & SERD_STYLE_ASCII)) {
+ // Write UTF-8 character directly to UTF-8 output
+ return sink(utf8, *size, writer);
+ }
+
+ if (c <= 0xFFFF) {
+ snprintf(escape, sizeof(escape), "\\u%04X", c);
+ return sink(escape, 6, writer);
+ } else {
+ snprintf(escape, sizeof(escape), "\\U%08X", c);
+ return sink(escape, 10, writer);
+ }
+}
+
+static inline bool
+uri_must_escape(const uint8_t c)
+{
+ switch (c) {
+ case ' ': case '"': case '<': case '>': case '\\':
+ case '^': case '`': case '{': case '|': case '}':
+ return true;
+ default:
+ return !in_range(c, 0x20, 0x7E);
+ }
+}
+
+static size_t
+write_uri(SerdWriter* writer, const uint8_t* utf8, size_t n_bytes)
+{
+ size_t len = 0;
+ for (size_t i = 0; i < n_bytes;) {
+ size_t j = i; // Index of next character that must be escaped
+ for (; j < n_bytes; ++j) {
+ if (uri_must_escape(utf8[j])) {
+ break;
+ }
+ }
+
+ // Bulk write all characters up to this special one
+ len += sink(&utf8[i], j - i, writer);
+ if ((i = j) == n_bytes) {
+ break; // Reached end
+ }
+
+ // Write UTF-8 character
+ size_t size = 0;
+ len += write_character(writer, utf8 + i, &size);
+ i += size;
+ if (size == 0) {
+ // Corrupt input, scan to start of next character
+ for (++i; i < n_bytes && (utf8[i] & 0x80); ++i) {}
+ }
+ }
+ return len;
+}
+
+static bool
+lname_must_escape(const uint8_t c)
+{
+ /* This arbitrary list of characters, most of which have nothing to do with
+ Turtle, must be handled as special cases here because the RDF and SPARQL
+ WGs are apparently intent on making the once elegant Turtle a baroque
+ and inconsistent mess, throwing elegance and extensibility completely
+ out the window for no good reason.
+
+ Note '-', '.', and '_' are also in PN_LOCAL_ESC, but are valid unescaped
+ in local names, so they are not escaped here. */
+
+ switch (c) {
+ case '\'': case '!': case '#': case '$': case '%': case '&':
+ case '(': case ')': case '*': case '+': case ',': case '/':
+ case ';': case '=': case '?': case '@': case '~':
+ return true;
+ }
+ return false;
+}
+
+static size_t
+write_lname(SerdWriter* writer, const uint8_t* utf8, size_t n_bytes)
+{
+ size_t len = 0;
+ for (size_t i = 0; i < n_bytes; ++i) {
+ size_t j = i; // Index of next character that must be escaped
+ for (; j < n_bytes; ++j) {
+ if (lname_must_escape(utf8[j])) {
+ break;
+ }
+ }
+
+ // Bulk write all characters up to this special one
+ len += sink(&utf8[i], j - i, writer);
+ if ((i = j) == n_bytes) {
+ break; // Reached end
+ }
+
+ // Write escape
+ len += sink("\\", 1, writer);
+ len += sink(&utf8[i], 1, writer);
+ }
+ return len;
+}
+
+static size_t
+write_text(SerdWriter* writer, TextContext ctx,
+ const uint8_t* utf8, size_t n_bytes)
+{
+ size_t len = 0;
+ for (size_t i = 0; i < n_bytes;) {
+ // Fast bulk write for long strings of printable ASCII
+ size_t j = i;
+ for (; j < n_bytes; ++j) {
+ if (utf8[j] == '\\' || utf8[j] == '"'
+ || (!in_range(utf8[j], 0x20, 0x7E))) {
+ break;
+ }
+ }
+
+ len += sink(&utf8[i], j - i, writer);
+ if ((i = j) == n_bytes) {
+ break; // Reached end
+ }
+
+ const uint8_t in = utf8[i++];
+ if (ctx == WRITE_LONG_STRING) {
+ switch (in) {
+ case '\\': len += sink("\\\\", 2, writer); continue;
+ case '\b': len += sink("\\b", 2, writer); continue;
+ case '\n': case '\r': case '\t': case '\f':
+ len += sink(&in, 1, writer); // Write character as-is
+ continue;
+ case '\"':
+ if (i == n_bytes) { // '"' at string end
+ len += sink("\\\"", 2, writer);
+ } else {
+ len += sink(&in, 1, writer);
+ }
+ continue;
+ default: break;
+ }
+ } else if (ctx == WRITE_STRING) {
+ switch (in) {
+ case '\\': len += sink("\\\\", 2, writer); continue;
+ case '\n': len += sink("\\n", 2, writer); continue;
+ case '\r': len += sink("\\r", 2, writer); continue;
+ case '\t': len += sink("\\t", 2, writer); continue;
+ case '"': len += sink("\\\"", 2, writer); continue;
+ default: break;
+ }
+ if (writer->syntax == SERD_TURTLE) {
+ switch (in) {
+ case '\b': len += sink("\\b", 2, writer); continue;
+ case '\f': len += sink("\\f", 2, writer); continue;
+ }
+ }
+ }
+
+ // Write UTF-8 character
+ size_t size = 0;
+ len += write_character(writer, utf8 + i - 1, &size);
+ if (size == 0) {
+ // Corrupt input, scan to start of next character
+ for (; i < n_bytes && (utf8[i] & 0x80); ++i) {}
+ } else {
+ i += size - 1;
+ }
+ }
+ return len;
+}
+
+static size_t
+uri_sink(const void* buf, size_t len, void* stream)
+{
+ return write_uri((SerdWriter*)stream, (const uint8_t*)buf, len);
+}
+
+static void
+write_newline(SerdWriter* writer)
+{
+ sink("\n", 1, writer);
+ for (unsigned i = 0; i < writer->indent; ++i) {
+ sink("\t", 1, writer);
+ }
+}
+
+static bool
+write_sep(SerdWriter* writer, const Sep sep)
+{
+ const SepRule* rule = &rules[sep];
+ if (rule->space_before) {
+ write_newline(writer);
+ }
+ if (rule->str) {
+ sink(rule->str, rule->len, writer);
+ }
+ if ((writer->last_sep && rule->space_after_sep) ||
+ (!writer->last_sep && rule->space_after_node)) {
+ write_newline(writer);
+ } else if (writer->last_sep && rule->space_after_node) {
+ sink(" ", 1, writer);
+ }
+ writer->last_sep = sep;
+ return true;
+}
+
+static SerdStatus
+reset_context(SerdWriter* writer, bool graph)
+{
+ if (graph) {
+ writer->context.graph.type = SERD_NOTHING;
+ }
+ writer->context.subject.type = SERD_NOTHING;
+ writer->context.predicate.type = SERD_NOTHING;
+ writer->empty = false;
+ return SERD_SUCCESS;
+}
+
+static SerdStatus
+free_context(SerdWriter* writer)
+{
+ serd_node_free(&writer->context.graph);
+ serd_node_free(&writer->context.subject);
+ serd_node_free(&writer->context.predicate);
+ return reset_context(writer, true);
+}
+
+static bool
+is_inline_start(const SerdWriter* writer, Field field, SerdStatementFlags flags)
+{
+ return (supports_abbrev(writer) &&
+ ((field == FIELD_SUBJECT && (flags & SERD_ANON_S_BEGIN)) ||
+ (field == FIELD_OBJECT && (flags & SERD_ANON_O_BEGIN))));
+}
+
+static bool
+write_literal(SerdWriter* writer,
+ const SerdNode* node,
+ const SerdNode* datatype,
+ const SerdNode* lang,
+ Field field,
+ SerdStatementFlags flags)
+{
+ if (supports_abbrev(writer) && datatype && datatype->buf) {
+ const char* type_uri = (const char*)datatype->buf;
+ if (!strncmp(type_uri, NS_XSD, sizeof(NS_XSD) - 1) && (
+ !strcmp(type_uri + sizeof(NS_XSD) - 1, "boolean") ||
+ !strcmp(type_uri + sizeof(NS_XSD) - 1, "integer"))) {
+ sink(node->buf, node->n_bytes, writer);
+ return true;
+ } else if (!strncmp(type_uri, NS_XSD, sizeof(NS_XSD) - 1) &&
+ !strcmp(type_uri + sizeof(NS_XSD) - 1, "decimal") &&
+ strchr((const char*)node->buf, '.') &&
+ node->buf[node->n_bytes - 1] != '.') {
+ /* xsd:decimal literals without trailing digits, e.g. "5.", can
+ not be written bare in Turtle. We could add a 0 which is
+ prettier, but changes the text and breaks round tripping.
+ */
+ sink(node->buf, node->n_bytes, writer);
+ return true;
+ }
+ }
+
+ if (supports_abbrev(writer)
+ && (node->flags & (SERD_HAS_NEWLINE|SERD_HAS_QUOTE))) {
+ sink("\"\"\"", 3, writer);
+ write_text(writer, WRITE_LONG_STRING, node->buf, node->n_bytes);
+ sink("\"\"\"", 3, writer);
+ } else {
+ sink("\"", 1, writer);
+ write_text(writer, WRITE_STRING, node->buf, node->n_bytes);
+ sink("\"", 1, writer);
+ }
+ if (lang && lang->buf) {
+ sink("@", 1, writer);
+ sink(lang->buf, lang->n_bytes, writer);
+ } else if (datatype && datatype->buf) {
+ sink("^^", 2, writer);
+ return write_node(writer, datatype, NULL, NULL, FIELD_NONE, flags);
+ }
+ return true;
+}
+
+// Return true iff `buf` is a valid prefixed name suffix
+static inline bool
+is_name(const uint8_t* buf, const size_t len)
+{
+ // TODO: This is more strict than it should be.
+ for (size_t i = 0; i < len; ++i) {
+ if (!(is_alpha(buf[i]) || is_digit(buf[i]))) {
+ return false;
+ }
+ }
+ return true;
+}
+
+static bool
+write_uri_node(SerdWriter* const writer,
+ const SerdNode* node,
+ const Field field,
+ const SerdStatementFlags flags)
+{
+ SerdNode prefix;
+ SerdChunk suffix;
+
+ if (is_inline_start(writer, field, flags)) {
+ ++writer->indent;
+ write_sep(writer, SEP_ANON_BEGIN);
+ sink("== ", 3, writer);
+ }
+
+ const bool has_scheme = serd_uri_string_has_scheme(node->buf);
+ if (field == FIELD_PREDICATE && supports_abbrev(writer)
+ && !strcmp((const char*)node->buf, NS_RDF "type")) {
+ return sink("a", 1, writer) == 1;
+ } else if (supports_abbrev(writer)
+ && !strcmp((const char*)node->buf, NS_RDF "nil")) {
+ return sink("()", 2, writer) == 2;
+ } else if (has_scheme && (writer->style & SERD_STYLE_CURIED) &&
+ serd_env_qualify(writer->env, node, &prefix, &suffix) &&
+ is_name(suffix.buf, suffix.len)) {
+ write_uri(writer, prefix.buf, prefix.n_bytes);
+ sink(":", 1, writer);
+ write_uri(writer, suffix.buf, suffix.len);
+ return true;
+ }
+
+ write_sep(writer, SEP_URI_BEGIN);
+ if (writer->style & SERD_STYLE_RESOLVED) {
+ SerdURI in_base_uri, uri, abs_uri;
+ serd_env_get_base_uri(writer->env, &in_base_uri);
+ serd_uri_parse(node->buf, &uri);
+ serd_uri_resolve(&uri, &in_base_uri, &abs_uri);
+ bool rooted = uri_is_under(&writer->base_uri, &writer->root_uri);
+ SerdURI* root = rooted ? &writer->root_uri : & writer->base_uri;
+ if (!uri_is_under(&abs_uri, root) ||
+ writer->syntax == SERD_NTRIPLES ||
+ writer->syntax == SERD_NQUADS) {
+ serd_uri_serialise(&abs_uri, uri_sink, writer);
+ } else {
+ serd_uri_serialise_relative(
+ &uri, &writer->base_uri, root, uri_sink, writer);
+ }
+ } else {
+ write_uri(writer, node->buf, node->n_bytes);
+ }
+ write_sep(writer, SEP_URI_END);
+ if (is_inline_start(writer, field, flags)) {
+ sink(" ;", 2, writer);
+ write_newline(writer);
+ }
+ return true;
+}
+
+static bool
+write_curie(SerdWriter* const writer,
+ const SerdNode* node,
+ const Field field,
+ const SerdStatementFlags flags)
+{
+ SerdChunk prefix;
+ SerdChunk suffix;
+ SerdStatus st;
+ switch (writer->syntax) {
+ case SERD_NTRIPLES:
+ case SERD_NQUADS:
+ if ((st = serd_env_expand(writer->env, node, &prefix, &suffix))) {
+ w_err(writer, st, "undefined namespace prefix `%s'\n", node->buf);
+ return false;
+ }
+ write_sep(writer, SEP_URI_BEGIN);
+ write_uri(writer, prefix.buf, prefix.len);
+ write_uri(writer, suffix.buf, suffix.len);
+ write_sep(writer, SEP_URI_END);
+ break;
+ case SERD_TURTLE:
+ case SERD_TRIG:
+ if (is_inline_start(writer, field, flags)) {
+ ++writer->indent;
+ write_sep(writer, SEP_ANON_BEGIN);
+ sink("== ", 3, writer);
+ }
+ write_lname(writer, node->buf, node->n_bytes);
+ if (is_inline_start(writer, field, flags)) {
+ sink(" ;", 2, writer);
+ write_newline(writer);
+ }
+ }
+ return true;
+}
+
+static bool
+write_blank(SerdWriter* const writer,
+ const SerdNode* node,
+ const Field field,
+ const SerdStatementFlags flags)
+{
+ if (supports_abbrev(writer)) {
+ if (is_inline_start(writer, field, flags)) {
+ ++writer->indent;
+ return write_sep(writer, SEP_ANON_BEGIN);
+ } else if (field == FIELD_SUBJECT && (flags & SERD_LIST_S_BEGIN)) {
+ assert(writer->list_depth == 0);
+ copy_node(&writer->list_subj, node);
+ ++writer->list_depth;
+ ++writer->indent;
+ return write_sep(writer, SEP_LIST_BEGIN);
+ } else if (field == FIELD_OBJECT && (flags & SERD_LIST_O_BEGIN)) {
+ ++writer->indent;
+ ++writer->list_depth;
+ return write_sep(writer, SEP_LIST_BEGIN);
+ } else if ((field == FIELD_SUBJECT && (flags & SERD_EMPTY_S)) ||
+ (field == FIELD_OBJECT && (flags & SERD_EMPTY_O))) {
+ return sink("[]", 2, writer) == 2;
+ }
+ }
+
+ sink("_:", 2, writer);
+ if (writer->bprefix && !strncmp((const char*)node->buf,
+ (const char*)writer->bprefix,
+ writer->bprefix_len)) {
+ sink(node->buf + writer->bprefix_len,
+ node->n_bytes - writer->bprefix_len,
+ writer);
+ } else {
+ sink(node->buf, node->n_bytes, writer);
+ }
+
+ return true;
+}
+
+static bool
+write_node(SerdWriter* writer,
+ const SerdNode* node,
+ const SerdNode* datatype,
+ const SerdNode* lang,
+ Field field,
+ SerdStatementFlags flags)
+{
+ bool ret = false;
+ switch (node->type) {
+ case SERD_LITERAL:
+ ret = write_literal(writer, node, datatype, lang, field, flags);
+ break;
+ case SERD_URI:
+ ret = write_uri_node(writer, node, field, flags);
+ break;
+ case SERD_CURIE:
+ ret = write_curie(writer, node, field, flags);
+ break;
+ case SERD_BLANK:
+ ret = write_blank(writer, node, field, flags);
+ default: break;
+ }
+ writer->last_sep = SEP_NONE;
+ return ret;
+}
+
+static inline bool
+is_resource(const SerdNode* node)
+{
+ return node->type > SERD_LITERAL;
+}
+
+static void
+write_pred(SerdWriter* writer, SerdStatementFlags flags, const SerdNode* pred)
+{
+ write_node(writer, pred, NULL, NULL, FIELD_PREDICATE, flags);
+ write_sep(writer, SEP_P_O);
+ copy_node(&writer->context.predicate, pred);
+}
+
+static bool
+write_list_obj(SerdWriter* writer,
+ SerdStatementFlags flags,
+ const SerdNode* predicate,
+ const SerdNode* object,
+ const SerdNode* datatype,
+ const SerdNode* lang)
+{
+ if (!strcmp((const char*)object->buf, NS_RDF "nil")) {
+ --writer->indent;
+ write_sep(writer, SEP_LIST_END);
+ return true;
+ } else if (!strcmp((const char*)predicate->buf, NS_RDF "first")) {
+ write_sep(writer, SEP_LIST_SEP);
+ write_node(writer, object, datatype, lang, FIELD_OBJECT, flags);
+ }
+ return false;
+}
+
+SerdStatus
+serd_writer_write_statement(SerdWriter* writer,
+ SerdStatementFlags flags,
+ const SerdNode* graph,
+ const SerdNode* subject,
+ const SerdNode* predicate,
+ const SerdNode* object,
+ const SerdNode* datatype,
+ const SerdNode* lang)
+{
+ if (!subject || !predicate || !object
+ || !subject->buf || !predicate->buf || !object->buf
+ || !is_resource(subject) || !is_resource(predicate)) {
+ return SERD_ERR_BAD_ARG;
+ }
+
+#define TRY(write_result) \
+ if (!(write_result)) { \
+ return SERD_ERR_UNKNOWN; \
+ }
+
+ switch (writer->syntax) {
+ case SERD_NTRIPLES:
+ case SERD_NQUADS:
+ TRY(write_node(writer, subject, NULL, NULL, FIELD_SUBJECT, flags));
+ sink(" ", 1, writer);
+ TRY(write_node(writer, predicate, NULL, NULL, FIELD_PREDICATE, flags));
+ sink(" ", 1, writer);
+ TRY(write_node(writer, object, datatype, lang, FIELD_OBJECT, flags));
+ if (writer->syntax == SERD_NQUADS && graph) {
+ sink(" ", 1, writer);
+ TRY(write_node(writer, graph, datatype, lang, FIELD_GRAPH, flags));
+ }
+ sink(" .\n", 3, writer);
+ return SERD_SUCCESS;
+ default:
+ break;
+ }
+
+ if ((graph && !serd_node_equals(graph, &writer->context.graph)) ||
+ (!graph && writer->context.graph.type)) {
+ writer->indent = 0;
+ if (writer->context.subject.type) {
+ write_sep(writer, SEP_END_S);
+ }
+ if (writer->context.graph.type) {
+ write_sep(writer, SEP_GRAPH_END);
+ }
+
+ reset_context(writer, true);
+ if (graph) {
+ TRY(write_node(writer, graph, datatype, lang, FIELD_GRAPH, flags));
+ ++writer->indent;
+ write_sep(writer, SEP_GRAPH_BEGIN);
+ copy_node(&writer->context.graph, graph);
+ }
+ }
+
+ if ((flags & SERD_LIST_CONT)) {
+ if (write_list_obj(writer, flags, predicate, object, datatype, lang)) {
+ // Reached end of list
+ if (--writer->list_depth == 0 && writer->list_subj.type) {
+ reset_context(writer, false);
+ serd_node_free(&writer->context.subject);
+ writer->context.subject = writer->list_subj;
+ writer->list_subj = SERD_NODE_NULL;
+ }
+ return SERD_SUCCESS;
+ }
+ } else if (serd_node_equals(subject, &writer->context.subject)) {
+ if (serd_node_equals(predicate, &writer->context.predicate)) {
+ // Abbreviate S P
+ if (!(flags & SERD_ANON_O_BEGIN)) {
+ ++writer->indent;
+ }
+ write_sep(writer, SEP_END_O);
+ write_node(writer, object, datatype, lang, FIELD_OBJECT, flags);
+ if (!(flags & SERD_ANON_O_BEGIN)) {
+ --writer->indent;
+ }
+ } else {
+ // Abbreviate S
+ Sep sep = writer->context.predicate.type ? SEP_END_P : SEP_S_P;
+ write_sep(writer, sep);
+ write_pred(writer, flags, predicate);
+ write_node(writer, object, datatype, lang, FIELD_OBJECT, flags);
+ }
+ } else {
+ // No abbreviation
+ if (writer->context.subject.type) {
+ assert(writer->indent > 0);
+ --writer->indent;
+ if (serd_stack_is_empty(&writer->anon_stack)) {
+ write_sep(writer, SEP_END_S);
+ }
+ } else if (!writer->empty) {
+ write_sep(writer, SEP_S_P);
+ }
+
+ if (!(flags & SERD_ANON_CONT)) {
+ write_node(writer, subject, NULL, NULL, FIELD_SUBJECT, flags);
+ ++writer->indent;
+ write_sep(writer, SEP_S_P);
+ } else {
+ ++writer->indent;
+ }
+
+ reset_context(writer, false);
+ copy_node(&writer->context.subject, subject);
+
+ if (!(flags & SERD_LIST_S_BEGIN)) {
+ write_pred(writer, flags, predicate);
+ }
+
+ write_node(writer, object, datatype, lang, FIELD_OBJECT, flags);
+ }
+
+ if (flags & (SERD_ANON_S_BEGIN|SERD_ANON_O_BEGIN)) {
+ WriteContext* ctx = (WriteContext*)serd_stack_push(
+ &writer->anon_stack, sizeof(WriteContext));
+ *ctx = writer->context;
+ WriteContext new_context = {
+ serd_node_copy(graph), serd_node_copy(subject), SERD_NODE_NULL };
+ if ((flags & SERD_ANON_S_BEGIN)) {
+ new_context.predicate = serd_node_copy(predicate);
+ }
+ writer->context = new_context;
+ } else {
+ copy_node(&writer->context.graph, graph);
+ copy_node(&writer->context.subject, subject);
+ copy_node(&writer->context.predicate, predicate);
+ }
+
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_writer_end_anon(SerdWriter* writer,
+ const SerdNode* node)
+{
+ if (writer->syntax == SERD_NTRIPLES || writer->syntax == SERD_NQUADS) {
+ return SERD_SUCCESS;
+ }
+ if (serd_stack_is_empty(&writer->anon_stack) || writer->indent == 0) {
+ w_err(writer, SERD_ERR_UNKNOWN,
+ "unexpected end of anonymous node\n");
+ return SERD_ERR_UNKNOWN;
+ }
+ --writer->indent;
+ write_sep(writer, SEP_ANON_END);
+ free_context(writer);
+ writer->context = *anon_stack_top(writer);
+ serd_stack_pop(&writer->anon_stack, sizeof(WriteContext));
+ const bool is_subject = serd_node_equals(node, &writer->context.subject);
+ if (is_subject) {
+ copy_node(&writer->context.subject, node);
+ writer->context.predicate.type = SERD_NOTHING;
+ }
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_writer_finish(SerdWriter* writer)
+{
+ if (writer->context.subject.type) {
+ write_sep(writer, SEP_END_S);
+ }
+ if (writer->context.graph.type) {
+ write_sep(writer, SEP_GRAPH_END);
+ }
+ serd_byte_sink_flush(&writer->byte_sink);
+ writer->indent = 0;
+ return free_context(writer);
+}
+
+SerdWriter*
+serd_writer_new(SerdSyntax syntax,
+ SerdStyle style,
+ SerdEnv* env,
+ const SerdURI* base_uri,
+ SerdSink ssink,
+ void* stream)
+{
+ const WriteContext context = WRITE_CONTEXT_NULL;
+ SerdWriter* writer = (SerdWriter*)calloc(1, sizeof(SerdWriter));
+ writer->syntax = syntax;
+ writer->style = style;
+ writer->env = env;
+ writer->root_node = SERD_NODE_NULL;
+ writer->root_uri = SERD_URI_NULL;
+ writer->base_uri = base_uri ? *base_uri : SERD_URI_NULL;
+ writer->anon_stack = serd_stack_new(4 * sizeof(WriteContext));
+ writer->context = context;
+ writer->list_subj = SERD_NODE_NULL;
+ writer->empty = true;
+ writer->byte_sink = serd_byte_sink_new(
+ ssink, stream, (style & SERD_STYLE_BULK) ? SERD_PAGE_SIZE : 1);
+ return writer;
+}
+
+void
+serd_writer_set_error_sink(SerdWriter* writer,
+ SerdErrorSink error_sink,
+ void* error_handle)
+{
+ writer->error_sink = error_sink;
+ writer->error_handle = error_handle;
+}
+
+void
+serd_writer_chop_blank_prefix(SerdWriter* writer,
+ const uint8_t* prefix)
+{
+ free(writer->bprefix);
+ writer->bprefix_len = 0;
+ writer->bprefix = NULL;
+ if (prefix) {
+ writer->bprefix_len = strlen((const char*)prefix);
+ writer->bprefix = (uint8_t*)malloc(writer->bprefix_len + 1);
+ memcpy(writer->bprefix, prefix, writer->bprefix_len + 1);
+ }
+}
+
+SerdStatus
+serd_writer_set_base_uri(SerdWriter* writer,
+ const SerdNode* uri)
+{
+ if (!serd_env_set_base_uri(writer->env, uri)) {
+ serd_env_get_base_uri(writer->env, &writer->base_uri);
+
+ if (writer->syntax == SERD_TURTLE || writer->syntax == SERD_TRIG) {
+ if (writer->context.graph.type || writer->context.subject.type) {
+ sink(" .\n\n", 4, writer);
+ reset_context(writer, true);
+ }
+ sink("@base <", 7, writer);
+ sink(uri->buf, uri->n_bytes, writer);
+ sink("> .\n", 4, writer);
+ }
+ writer->indent = 0;
+ return reset_context(writer, true);
+ }
+ return SERD_ERR_UNKNOWN;
+}
+
+SerdStatus
+serd_writer_set_root_uri(SerdWriter* writer,
+ const SerdNode* uri)
+{
+ serd_node_free(&writer->root_node);
+ if (uri && uri->buf) {
+ writer->root_node = serd_node_copy(uri);
+ serd_uri_parse(uri->buf, &writer->root_uri);
+ } else {
+ writer->root_node = SERD_NODE_NULL;
+ writer->root_uri = SERD_URI_NULL;
+ }
+ return SERD_SUCCESS;
+}
+
+SerdStatus
+serd_writer_set_prefix(SerdWriter* writer,
+ const SerdNode* name,
+ const SerdNode* uri)
+{
+ if (!serd_env_set_prefix(writer->env, name, uri)) {
+ if (writer->syntax == SERD_TURTLE || writer->syntax == SERD_TRIG) {
+ if (writer->context.graph.type || writer->context.subject.type) {
+ sink(" .\n\n", 4, writer);
+ reset_context(writer, true);
+ }
+ sink("@prefix ", 8, writer);
+ sink(name->buf, name->n_bytes, writer);
+ sink(": <", 3, writer);
+ write_uri(writer, uri->buf, uri->n_bytes);
+ sink("> .\n", 4, writer);
+ }
+ writer->indent = 0;
+ return reset_context(writer, true);
+ }
+ return SERD_ERR_UNKNOWN;
+}
+
+void
+serd_writer_free(SerdWriter* writer)
+{
+ serd_writer_finish(writer);
+ serd_stack_free(&writer->anon_stack);
+ free(writer->bprefix);
+ serd_byte_sink_free(&writer->byte_sink);
+ serd_node_free(&writer->root_node);
+ free(writer);
+}
+
+SerdEnv*
+serd_writer_get_env(SerdWriter* writer)
+{
+ return writer->env;
+}
+
+size_t
+serd_file_sink(const void* buf, size_t len, void* stream)
+{
+ return fwrite(buf, 1, len, (FILE*)stream);
+}
+
+size_t
+serd_chunk_sink(const void* buf, size_t len, void* stream)
+{
+ SerdChunk* chunk = (SerdChunk*)stream;
+ chunk->buf = (uint8_t*)realloc((uint8_t*)chunk->buf, chunk->len + len);
+ memcpy((uint8_t*)chunk->buf + chunk->len, buf, len);
+ chunk->len += len;
+ return len;
+}
+
+uint8_t*
+serd_chunk_sink_finish(SerdChunk* stream)
+{
+ serd_chunk_sink("", 1, stream);
+ return (uint8_t*)stream->buf;
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-06-28 00:49:32 +0000