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-rw-r--r--src/write.c96
1 files changed, 44 insertions, 52 deletions
diff --git a/src/write.c b/src/write.c
index e4d524c6..ef10594b 100644
--- a/src/write.c
+++ b/src/write.c
@@ -16,6 +16,7 @@
*/
#include <assert.h>
+#include <stdio.h>
#include <stdlib.h>
#include "serd/serd.h"
@@ -23,39 +24,29 @@
struct SerdWriterImpl {
SerdSyntax syntax;
SerdNamespaces ns;
- FILE* fd;
SerdURI base_uri;
+ SerdSink sink;
+ void* stream;
};
-static size_t
-file_sink(const uint8_t* buf, size_t len, void* stream)
-{
- FILE* file = (FILE*)stream;
- return fwrite(buf, 1, len, file);
-}
-
-static inline bool
-serd_write_uri(FILE* file, const SerdURI* uri)
-{
- return serd_uri_serialise(uri, file_sink, file);
-}
-
static bool
-serd_write_ascii(const uint8_t* utf8, size_t n_bytes, FILE* out_fd, const uint8_t esc)
+serd_write_ascii(SerdWriter writer, const uint8_t* utf8, size_t n_bytes, const uint8_t esc)
{
+ char escape[10] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
for (size_t i = 0; i < n_bytes;) {
uint8_t in = utf8[i++];
switch (in) {
- case '\\': fwrite("\\\\", 1, 2, out_fd); continue;
- case '\n': fwrite("\\n", 1, 2, out_fd); continue;
- case '\r': fwrite("\\r", 1, 2, out_fd); continue;
- case '\t': fwrite("\\t", 1, 2, out_fd); continue;
- case '"': if (esc == '"') { fwrite("\\\"", 1, 2, out_fd); continue; }
+ case '\\': writer->sink("\\\\", 2, writer->stream); continue;
+ case '\n': writer->sink("\\n", 2, writer->stream); continue;
+ case '\r': writer->sink("\\r", 2, writer->stream); continue;
+ case '\t': writer->sink("\\t", 2, writer->stream); continue;
+ case '"': if (esc == '"') { writer->sink("\\\"", 2, writer->stream); continue; }
default: break;
}
if (in == esc) {
- fprintf(out_fd, "\\u%04X", esc);
+ sprintf(escape, "\\u%04X", esc);
+ writer->sink(escape, 6, writer->stream);
continue;
}
@@ -65,7 +56,7 @@ serd_write_ascii(const uint8_t* utf8, size_t n_bytes, FILE* out_fd, const uint8_
size = 1;
c = in & 0x7F;
if ((in >= 0x20) && (in <= 0x7E)) { // Printable ASCII
- fwrite(&in, 1, 1, out_fd);
+ writer->sink(&in, 1, writer->stream);
continue;
}
} else if ((in & 0xE0) == 0xC0) { // Starts with `110'
@@ -104,23 +95,23 @@ serd_write_ascii(const uint8_t* utf8, size_t n_bytes, FILE* out_fd, const uint8_
}
if (c < 0xFFFF) {
- fprintf(out_fd, "\\u%04X", c);
+ sprintf(escape, "\\u%04X", c);
+ writer->sink(escape, 6, writer->stream);
} else {
- fprintf(out_fd, "\\U%08X", c);
+ sprintf(escape, "\\U%08X", c);
+ writer->sink(escape, 10, writer->stream);
}
}
return true;
}
-SERD_API
-bool
+static bool
serd_write_node(SerdWriter writer,
SerdNodeType type,
const SerdString* str,
const SerdString* datatype,
const SerdString* lang)
{
- FILE* const fd = writer->fd;
const SerdURI* base_uri = &writer->base_uri;
SerdNamespaces ns = writer->ns;
@@ -128,18 +119,18 @@ serd_write_node(SerdWriter writer,
SerdChunk uri_suffix;
switch (type) {
case BLANK:
- fwrite("_:", 1, 2, fd);
- fwrite(str->buf, 1, str->n_bytes - 1, fd);
+ writer->sink("_:", 2, writer->stream);
+ writer->sink(str->buf, str->n_bytes - 1, writer->stream);
break;
case QNAME:
if (!serd_namespaces_expand(ns, str, &uri_prefix, &uri_suffix)) {
fprintf(stderr, "error: undefined namespace prefix `%s'\n", str->buf);
return false;
}
- fwrite("<", 1, 1, fd);
- serd_write_ascii(uri_prefix.buf, uri_prefix.len, fd, '>');
- serd_write_ascii(uri_suffix.buf, uri_suffix.len, fd, '>');
- fwrite(">", 1, 1, fd);
+ writer->sink("<", 1, writer->stream);
+ serd_write_ascii(writer, uri_prefix.buf, uri_prefix.len, '>');
+ serd_write_ascii(writer, uri_suffix.buf, uri_suffix.len, '>');
+ writer->sink(">", 1, writer->stream);
break;
case URI:
if (!serd_uri_string_has_scheme(str->buf)) {
@@ -147,28 +138,28 @@ serd_write_node(SerdWriter writer,
if (serd_uri_parse(str->buf, &uri)) {
SerdURI abs_uri;
if (serd_uri_resolve(&uri, base_uri, &abs_uri)) {
- fwrite("<", 1, 1, fd);
- serd_write_uri(fd, &abs_uri);
- fwrite(">", 1, 1, fd);
+ writer->sink("<", 1, writer->stream);
+ serd_uri_serialise(&abs_uri, writer->sink, writer->stream);
+ writer->sink(">", 1, writer->stream);
return true;
}
}
} else {
- fwrite("<", 1, 1, fd);
- serd_write_ascii(str->buf, str->n_bytes - 1, fd, '>');
- fwrite(">", 1, 1, fd);
+ writer->sink("<", 1, writer->stream);
+ serd_write_ascii(writer, str->buf, str->n_bytes - 1, '>');
+ writer->sink(">", 1, writer->stream);
return true;
}
return false;
case LITERAL:
- fwrite("\"", 1, 1, fd);
- serd_write_ascii(str->buf, str->n_bytes - 1, fd, '"');
- fwrite("\"", 1, 1, fd);
+ writer->sink("\"", 1, writer->stream);
+ serd_write_ascii(writer, str->buf, str->n_bytes - 1, '"');
+ writer->sink("\"", 1, writer->stream);
if (lang) {
- fwrite("@", 1, 1, fd);
- fwrite(lang->buf, 1, lang->n_bytes - 1, fd);
+ writer->sink("@", 1, writer->stream);
+ writer->sink(lang->buf, lang->n_bytes - 1, writer->stream);
} else if (datatype) {
- fwrite("^^", 1, 2, fd);
+ writer->sink("^^", 2, writer->stream);
serd_write_node(writer, URI, datatype, NULL, NULL);
}
break;
@@ -189,13 +180,12 @@ serd_writer_write_statement(SerdWriter writer,
const SerdString* object_datatype,
const SerdString* object_lang)
{
- FILE* const fd = writer->fd;
serd_write_node(writer, subject_type, subject, NULL, NULL);
- fwrite(" ", 1, 1, fd);
+ writer->sink(" ", 1, writer->stream);
serd_write_node(writer, predicate_type, predicate, NULL, NULL);
- fwrite(" ", 1, 1, fd);
+ writer->sink(" ", 1, writer->stream);
serd_write_node(writer, object_type, object, object_datatype, object_lang);
- fwrite(" .\n", 1, 3, fd);
+ writer->sink(" .\n", 3, writer->stream);
return true;
}
@@ -203,14 +193,16 @@ SERD_API
SerdWriter
serd_writer_new(SerdSyntax syntax,
SerdNamespaces ns,
- FILE* file,
- const SerdURI* base_uri)
+ const SerdURI* base_uri,
+ SerdSink sink,
+ void* stream)
{
SerdWriter writer = malloc(sizeof(struct SerdWriterImpl));
writer->syntax = syntax;
writer->ns = ns;
- writer->fd = file;
writer->base_uri = *base_uri;
+ writer->sink = sink;
+ writer->stream = stream;
return writer;
}
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