LLM-Inference/llama.cpp
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common/peg : suppress incomplete escape sequences (#26780)

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This commit is contained in:
Aldehir Rojas
2026-08-11 07:10:31 +03:00
committed by GitHub
parent 84f7129467
commit 48d22e295e
2 changed files with 39 additions and 4 deletions
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common/peg-parser.cpp
+15 -4
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@@ -570,23 +570,34 @@ struct parser_executor {
}
static common_peg_parse_result handle_escape_sequence(common_peg_parse_context & ctx, size_t start, size_t & pos, const char delimiter) {
auto save = pos;
++pos; // consume '\'
if (pos >= ctx.input.size()) {
if (!ctx.is_lenient()) {
return common_peg_parse_result(COMMON_PEG_PARSE_RESULT_FAIL, start);
}
pos = save; // suppress unmatched '\'
return common_peg_parse_result(COMMON_PEG_PARSE_RESULT_NEED_MORE_INPUT, start, pos);
}
char c = ctx.input[pos];
if (c == delimiter || c == '\\' || c == '/' || c == 'b' || c == 'f' || c == 'n' || c == 'r' || c == 't') {
++pos;
return common_peg_parse_result(COMMON_PEG_PARSE_RESULT_SUCCESS, start, pos);
} else if (c == 'u') {
return handle_unicode_escape(ctx, start, pos);
} else {
return common_peg_parse_result(COMMON_PEG_PARSE_RESULT_FAIL, start);
}
if (c == 'u') {
auto result = handle_unicode_escape(ctx, start, pos);
if (result.need_more_input()) {
pos = save; // suppress incomplete sequence
return common_peg_parse_result(COMMON_PEG_PARSE_RESULT_NEED_MORE_INPUT, start, pos);
}
return result;
}
return common_peg_parse_result(COMMON_PEG_PARSE_RESULT_FAIL, start);
}
static common_peg_parse_result handle_unicode_escape(common_peg_parse_context & ctx, size_t start, size_t & pos) {