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-rw-r--r--src/reader.c147
1 files changed, 77 insertions, 70 deletions
diff --git a/src/reader.c b/src/reader.c
index 4424c61c..d71524ec 100644
--- a/src/reader.c
+++ b/src/reader.c
@@ -153,31 +153,38 @@ peek_byte(SerdReader* reader)
}
static inline uint8_t
-eat_byte(SerdReader* reader, const uint8_t byte)
+eat_byte_safe(SerdReader* reader, const uint8_t byte)
{
- const uint8_t c = peek_byte(reader);
+ assert(peek_byte(reader) == byte);
++reader->read_head;
- switch (c) {
+ switch (byte) {
case '\0': reader->eof = true; break;
case '\n': ++reader->cur.line; reader->cur.col = 0; break;
default: ++reader->cur.col;
}
- if (c != byte) {
- return error(reader, "expected `%c', not `%c'\n", byte, c);
- }
if (reader->from_file && (reader->read_head == SERD_PAGE_SIZE)) {
TRY_RET(page(reader));
assert(reader->read_head < SERD_PAGE_SIZE);
}
- return c;
+ return byte;
+}
+
+static inline uint8_t
+eat_byte_check(SerdReader* reader, const uint8_t byte)
+{
+ if (peek_byte(reader) != byte) {
+ return error(reader, "expected `%c', not `%c'\n",
+ byte, peek_byte(reader));
+ }
+ return eat_byte_safe(reader, byte);
}
static inline void
eat_string(SerdReader* reader, const char* str, unsigned n)
{
for (unsigned i = 0; i < n; ++i) {
- eat_byte(reader, ((const uint8_t*)str)[i]);
+ eat_byte_check(reader, ((const uint8_t*)str)[i]);
}
}
@@ -306,7 +313,7 @@ read_hex(SerdReader* reader)
{
const uint8_t c = peek_byte(reader);
if (in_range(c, 0x30, 0x39) || in_range(c, 0x41, 0x46)) {
- return eat_byte(reader, c);
+ return eat_byte_safe(reader, c);
} else {
return error(reader, "illegal hexadecimal digit `%c'\n", c);
}
@@ -366,13 +373,13 @@ read_character_escape(SerdReader* reader, Ref dest)
{
switch (peek_byte(reader)) {
case '\\':
- push_byte(reader, dest, eat_byte(reader, '\\'));
+ push_byte(reader, dest, eat_byte_safe(reader, '\\'));
return true;
case 'u':
- eat_byte(reader, 'u');
+ eat_byte_safe(reader, 'u');
return read_hex_escape(reader, 4, dest);
case 'U':
- eat_byte(reader, 'U');
+ eat_byte_safe(reader, 'U');
return read_hex_escape(reader, 8, dest);
default:
return false;
@@ -384,17 +391,17 @@ read_echaracter_escape(SerdReader* reader, Ref dest, SerdNodeFlags* flags)
{
switch (peek_byte(reader)) {
case 't':
- eat_byte(reader, 't');
+ eat_byte_safe(reader, 't');
push_byte(reader, dest, '\t');
return true;
case 'n':
*flags |= SERD_HAS_NEWLINE;
- eat_byte(reader, 'n');
+ eat_byte_safe(reader, 'n');
push_byte(reader, dest, '\n');
return true;
case 'r':
*flags |= SERD_HAS_NEWLINE;
- eat_byte(reader, 'r');
+ eat_byte_safe(reader, 'r');
push_byte(reader, dest, '\r');
return true;
default:
@@ -408,7 +415,7 @@ read_scharacter_escape(SerdReader* reader, Ref dest, SerdNodeFlags* flags)
switch (peek_byte(reader)) {
case '"':
*flags |= SERD_HAS_QUOTE;
- push_byte(reader, dest, eat_byte(reader, '"'));
+ push_byte(reader, dest, eat_byte_safe(reader, '"'));
return true;
default:
return read_echaracter_escape(reader, dest, flags);
@@ -421,7 +428,7 @@ read_ucharacter_escape(SerdReader* reader, Ref dest)
SerdNodeFlags flags = 0;
switch (peek_byte(reader)) {
case '>':
- push_byte(reader, dest, eat_byte(reader, '>'));
+ push_byte(reader, dest, eat_byte_safe(reader, '>'));
return true;
default:
return read_echaracter_escape(reader, dest, &flags);
@@ -440,7 +447,7 @@ bad_char(SerdReader* reader, Ref dest, const char* fmt, uint8_t c)
// Skip bytes until the next start byte
for (uint8_t c = peek_byte(reader); (c & 0x80);) {
- eat_byte(reader, c);
+ eat_byte_safe(reader, c);
c = peek_byte(reader);
}
@@ -464,9 +471,9 @@ read_character(SerdReader* reader, Ref dest)
if (c < 0x20) { // ASCII control character
return bad_char(reader, dest,
"unexpected control character 0x%X\n",
- eat_byte(reader, c));
+ eat_byte_safe(reader, c));
} else if (c <= 0x7E) { // Printable ASCII
- push_byte(reader, dest, eat_byte(reader, c));
+ push_byte(reader, dest, eat_byte_safe(reader, c));
return SERD_SUCCESS;
} else { // Wide UTF-8 character
unsigned size = 1;
@@ -478,11 +485,11 @@ read_character(SerdReader* reader, Ref dest)
size = 4;
} else {
return bad_char(reader, dest, "invalid UTF-8 start 0x%X\n",
- eat_byte(reader, c));
+ eat_byte_safe(reader, c));
}
char bytes[size];
- bytes[0] = eat_byte(reader, c);
+ bytes[0] = eat_byte_safe(reader, c);
// Check character validity
for (unsigned i = 1; i < size; ++i) {
@@ -491,7 +498,7 @@ read_character(SerdReader* reader, Ref dest)
"invalid UTF-8 continuation 0x%X\n",
bytes[i]);
}
- eat_byte(reader, bytes[i]);
+ eat_byte_safe(reader, bytes[i]);
}
// Emit character
@@ -511,7 +518,7 @@ read_echaracter(SerdReader* reader, Ref dest)
uint8_t c = peek_byte(reader);
switch (c) {
case '\\':
- eat_byte(reader, '\\');
+ eat_byte_safe(reader, '\\');
if (read_echaracter_escape(reader, peek_byte(reader), &flags)) {
return SERD_SUCCESS;
} else {
@@ -533,17 +540,17 @@ read_lcharacter(SerdReader* reader, Ref dest, SerdNodeFlags* flags)
case '"':
peek_string(reader, pre, 4);
if (pre[1] == '\"' && pre[2] == '\"' && pre[3] != '\"') {
- eat_byte(reader, '\"');
- eat_byte(reader, '\"');
- eat_byte(reader, '\"');
+ eat_byte_safe(reader, '\"');
+ eat_byte_safe(reader, '\"');
+ eat_byte_safe(reader, '\"');
return SERD_FAILURE;
} else {
*flags |= SERD_HAS_QUOTE;
- push_byte(reader, dest, eat_byte(reader, '"'));
+ push_byte(reader, dest, eat_byte_safe(reader, '"'));
return SERD_SUCCESS;
}
case '\\':
- eat_byte(reader, '\\');
+ eat_byte_safe(reader, '\\');
if (read_scharacter_escape(reader, dest, flags)) {
return SERD_SUCCESS;
} else {
@@ -553,7 +560,7 @@ read_lcharacter(SerdReader* reader, Ref dest, SerdNodeFlags* flags)
case 0xA: case 0xD:
*flags |= SERD_HAS_NEWLINE;
case 0x9:
- push_byte(reader, dest, eat_byte(reader, c));
+ push_byte(reader, dest, eat_byte_safe(reader, c));
return SERD_SUCCESS;
default:
return read_echaracter(reader, dest);
@@ -567,7 +574,7 @@ read_scharacter(SerdReader* reader, Ref dest, SerdNodeFlags* flags)
uint8_t c = peek_byte(reader);
switch (c) {
case '\\':
- eat_byte(reader, '\\');
+ eat_byte_safe(reader, '\\');
if (read_scharacter_escape(reader, dest, flags)) {
return SERD_SUCCESS;
} else {
@@ -589,7 +596,7 @@ read_ucharacter(SerdReader* reader, Ref dest)
const uint8_t c = peek_byte(reader);
switch (c) {
case '\\':
- eat_byte(reader, '\\');
+ eat_byte_safe(reader, '\\');
if (read_ucharacter_escape(reader, dest)) {
return SERD_SUCCESS;
} else {
@@ -606,10 +613,10 @@ read_ucharacter(SerdReader* reader, Ref dest)
static void
read_comment(SerdReader* reader)
{
- eat_byte(reader, '#');
+ eat_byte_safe(reader, '#');
uint8_t c;
while (((c = peek_byte(reader)) != 0xA) && (c != 0xD)) {
- eat_byte(reader, c);
+ eat_byte_safe(reader, c);
}
}
@@ -620,7 +627,7 @@ read_ws(SerdReader* reader)
const uint8_t c = peek_byte(reader);
switch (c) {
case 0x9: case 0xA: case 0xD: case 0x20:
- eat_byte(reader, c);
+ eat_byte_safe(reader, c);
return true;
case '#':
read_comment(reader);
@@ -666,12 +673,12 @@ read_longString(SerdReader* reader, SerdNodeFlags* flags)
static Ref
read_string(SerdReader* reader, SerdNodeFlags* flags)
{
- eat_byte(reader, '\"');
+ eat_byte_safe(reader, '\"');
Ref ref = push_node(reader, SERD_LITERAL, "", 0);
SerdStatus st;
while (!(st = read_scharacter(reader, ref, flags))) {}
if (st < SERD_ERR_UNKNOWN) {
- eat_byte(reader, '\"');
+ eat_byte_check(reader, '\"');
return ref;
}
pop_node(reader, ref);
@@ -719,7 +726,7 @@ read_nameStartChar(SerdReader* reader, bool required)
{
const uint8_t c = peek_byte(reader);
if (c == '_' || is_alpha(c)) { // TODO: not strictly correct
- return eat_byte(reader, c);
+ return eat_byte_safe(reader, c);
} else {
if (required) {
error(reader, "illegal character `%c'\n", c);
@@ -740,7 +747,7 @@ read_nameChar(SerdReader* reader)
switch ((c = peek_byte(reader))) {
case '-': case 0xB7: case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
- return eat_byte(reader, c);
+ return eat_byte_safe(reader, c);
default: // TODO: 0x300-0x036F | 0x203F-0x2040
return 0;
}
@@ -792,16 +799,16 @@ read_language(SerdReader* reader)
return 0;
}
Ref ref = push_node(reader, SERD_LITERAL, "", 0);
- push_byte(reader, ref, eat_byte(reader, start));
+ push_byte(reader, ref, eat_byte_safe(reader, start));
uint8_t c;
while ((c = peek_byte(reader)) && in_range(c, 'a', 'z')) {
- push_byte(reader, ref, eat_byte(reader, c));
+ push_byte(reader, ref, eat_byte_safe(reader, c));
}
while (peek_byte(reader) == '-') {
- push_byte(reader, ref, eat_byte(reader, '-'));
+ push_byte(reader, ref, eat_byte_safe(reader, '-'));
while ((c = peek_byte(reader)) && (
in_range(c, 'a', 'z') || in_range(c, '0', '9'))) {
- push_byte(reader, ref, eat_byte(reader, c));
+ push_byte(reader, ref, eat_byte_safe(reader, c));
}
}
return ref;
@@ -811,9 +818,9 @@ read_language(SerdReader* reader)
static Ref
read_uriref(SerdReader* reader)
{
- TRY_RET(eat_byte(reader, '<'));
+ TRY_RET(eat_byte_check(reader, '<'));
Ref const str = read_relativeURI(reader);
- if (str && eat_byte(reader, '>')) {
+ if (str && eat_byte_check(reader, '>')) {
return str;
}
pop_node(reader, str);
@@ -828,7 +835,7 @@ read_qname(SerdReader* reader)
if (!prefix) {
prefix = push_node(reader, SERD_CURIE, "", 0);
}
- TRY_THROW(eat_byte(reader, ':'));
+ TRY_THROW(eat_byte_check(reader, ':'));
push_byte(reader, prefix, ':');
Ref str = read_name(reader, prefix, false);
return str ? str : prefix;
@@ -845,10 +852,10 @@ read_0_9(SerdReader* reader, Ref str, bool at_least_one)
if (!is_digit((c = peek_byte(reader)))) {
return error(reader, "expected digit\n");
}
- push_byte(reader, str, eat_byte(reader, c));
+ push_byte(reader, str, eat_byte_safe(reader, c));
}
while (is_digit((c = peek_byte(reader)))) {
- push_byte(reader, str, eat_byte(reader, c));
+ push_byte(reader, str, eat_byte_safe(reader, c));
}
return true;
}
@@ -871,29 +878,29 @@ read_number(SerdReader* reader, Ref* dest, Ref* datatype)
uint8_t c = peek_byte(reader);
bool has_decimal = false;
if (c == '-' || c == '+') {
- push_byte(reader, ref, eat_byte(reader, 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(reader, c));
+ 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(read_0_9(reader, ref, true));
if ((c = peek_byte(reader)) == '.') {
has_decimal = true;
- push_byte(reader, ref, eat_byte(reader, c));
+ push_byte(reader, ref, eat_byte_safe(reader, c));
TRY_THROW(read_0_9(reader, ref, false));
}
}
c = peek_byte(reader);
if (c == 'e' || c == 'E') {
// double
- push_byte(reader, ref, eat_byte(reader, c));
+ push_byte(reader, ref, eat_byte_safe(reader, c));
switch ((c = peek_byte(reader))) {
case '+': case '-':
- push_byte(reader, ref, eat_byte(reader, c));
+ push_byte(reader, ref, eat_byte_safe(reader, c));
default: break;
}
read_0_9(reader, ref, true);
@@ -946,12 +953,12 @@ read_literal(SerdReader* reader, Ref* dest,
switch (peek_byte(reader)) {
case '^':
- eat_byte(reader, '^');
- eat_byte(reader, '^');
+ eat_byte_safe(reader, '^');
+ eat_byte_check(reader, '^');
TRY_THROW(read_resource(reader, datatype));
break;
case '@':
- eat_byte(reader, '@');
+ eat_byte_safe(reader, '@');
TRY_THROW(*lang = read_language(reader));
}
*dest = str;
@@ -981,7 +988,7 @@ read_verb(SerdReader* reader, Ref* dest)
case 'a':
switch (pre[1]) {
case 0x9: case 0xA: case 0xD: case 0x20:
- eat_byte(reader, 'a');
+ eat_byte_check(reader, 'a');
*dest = push_node(reader, SERD_URI, NS_RDF "type", 47);
return true;
default: break; // fall through
@@ -995,8 +1002,8 @@ read_verb(SerdReader* reader, Ref* dest)
static Ref
read_nodeID(SerdReader* reader)
{
- eat_byte(reader, '_');
- eat_byte(reader, ':');
+ eat_byte_safe(reader, '_');
+ eat_byte_check(reader, ':');
Ref ref = push_node(reader, SERD_BLANK, "", 0);
read_name(reader, ref, true);
SerdNode* const node = deref(reader, ref);
@@ -1040,11 +1047,11 @@ read_blank(SerdReader* reader, ReadContext ctx, bool subject, Ref* dest)
*dest = read_nodeID(reader);
return true;
case '[':
- eat_byte(reader, '[');
+ eat_byte_safe(reader, '[');
read_ws_star(reader);
*dest = blank_id(reader);
if (peek_byte(reader) == ']') {
- eat_byte(reader, ']');
+ eat_byte_safe(reader, ']');
*ctx.flags |= (subject) ? SERD_EMPTY_S : SERD_EMPTY_O;
if (ctx.subject) {
TRY_RET(emit_statement(reader, ctx.flags,
@@ -1066,7 +1073,7 @@ read_blank(SerdReader* reader, ReadContext ctx, bool subject, Ref* dest)
}
read_predicateObjectList(reader, ctx, true);
read_ws_star(reader);
- eat_byte(reader, ']');
+ eat_byte_check(reader, ']');
if (reader->end_sink) {
reader->end_sink(reader->handle, deref(reader, *dest));
}
@@ -1187,7 +1194,7 @@ read_objectList(SerdReader* reader, ReadContext ctx, bool blank)
TRY_RET(read_object(reader, ctx));
read_ws_star(reader);
while (peek_byte(reader) == ',') {
- eat_byte(reader, ',');
+ eat_byte_safe(reader, ',');
read_ws_star(reader);
TRY_RET(read_object(reader, ctx));
read_ws_star(reader);
@@ -1211,7 +1218,7 @@ read_predicateObjectList(SerdReader* reader, ReadContext ctx, bool blank)
predicate = 0;
read_ws_star(reader);
while (peek_byte(reader) == ';') {
- eat_byte(reader, ';');
+ eat_byte_safe(reader, ';');
read_ws_star(reader);
switch (peek_byte(reader)) {
case '.': case ']':
@@ -1239,7 +1246,7 @@ read_collection_rec(SerdReader* reader, ReadContext ctx)
{
read_ws_star(reader);
if (peek_byte(reader) == ')') {
- eat_byte(reader, ')');
+ eat_byte_safe(reader, ')');
TRY_RET(emit_statement(reader, ctx.flags,
0,
ctx.subject,
@@ -1271,10 +1278,10 @@ read_collection_rec(SerdReader* reader, ReadContext ctx)
static bool
read_collection(SerdReader* reader, ReadContext ctx, Ref* dest)
{
- TRY_RET(eat_byte(reader, '('));
+ TRY_RET(eat_byte_safe(reader, '('));
read_ws_star(reader);
if (peek_byte(reader) == ')') { // Empty collection
- eat_byte(reader, ')');
+ eat_byte_safe(reader, ')');
*dest = reader->rdf_nil;
return true;
}
@@ -1351,7 +1358,7 @@ read_prefixID(SerdReader* reader)
if (!name) {
name = push_node(reader, SERD_LITERAL, "", 0);
}
- TRY_THROW(eat_byte(reader, ':') == ':');
+ TRY_THROW(eat_byte_check(reader, ':') == ':');
read_ws_star(reader);
Ref uri = 0;
TRY_THROW(uri = read_uriref(reader));
@@ -1370,7 +1377,7 @@ except:
static bool
read_directive(SerdReader* reader)
{
- eat_byte(reader, '@');
+ eat_byte_safe(reader, '@');
switch (peek_byte(reader)) {
case 'b':
return read_base(reader);
@@ -1401,7 +1408,7 @@ read_statement(SerdReader* reader)
break;
}
read_ws_star(reader);
- return eat_byte(reader, '.');
+ return eat_byte_check(reader, '.');
}
// [1] turtleDoc ::= statement
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-06 14:36:14 +0000