Function compile_pcre2_pattern

grep.c:295–406

}

static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt)
{
	int error;
	PCRE2_UCHAR errbuf[256];
	PCRE2_SIZE erroffset;
	int options = PCRE2_MULTILINE;
	int jitret;
	int patinforet;
	size_t jitsizearg;
	int literal = !opt->ignore_case && (p->fixed || p->is_fixed);

	/*
	 * Call pcre2_general_context_create() before calling any
	 * other pcre2_*(). It sets up our malloc()/free() functions
	 * with which everything else is allocated.
	 */
	p->pcre2_general_context = pcre2_general_context_create(
		pcre2_malloc, pcre2_free, NULL);
	if (!p->pcre2_general_context)
		die("Couldn't allocate PCRE2 general context");

	if (opt->ignore_case) {
		if (!opt->ignore_locale && has_non_ascii(p->pattern)) {
			p->pcre2_tables = pcre2_maketables(p->pcre2_general_context);
			p->pcre2_compile_context = pcre2_compile_context_create(p->pcre2_general_context);
			pcre2_set_character_tables(p->pcre2_compile_context,
							p->pcre2_tables);
		}
		options |= PCRE2_CASELESS;
	}
	if (!opt->ignore_locale && is_utf8_locale() && !literal)
		options |= (PCRE2_UTF | PCRE2_UCP | PCRE2_MATCH_INVALID_UTF);

#ifndef GIT_PCRE2_VERSION_10_35_OR_HIGHER
	/*
	 * Work around a JIT bug related to invalid Unicode character handling
	 * fixed in 10.35:
	 * https://github.com/PCRE2Project/pcre2/commit/c21bd977547d
	 */
	options &= ~PCRE2_UCP;
#endif

#ifndef GIT_PCRE2_VERSION_10_36_OR_HIGHER
	/* Work around https://bugs.exim.org/show_bug.cgi?id=2642 fixed in 10.36 */
	if (PCRE2_MATCH_INVALID_UTF && options & (PCRE2_UTF | PCRE2_CASELESS))
		options |= PCRE2_NO_START_OPTIMIZE;
#endif

	p->pcre2_pattern = pcre2_compile((PCRE2_SPTR)p->pattern,
					 p->patternlen, options, &error, &erroffset,
					 p->pcre2_compile_context);

	if (p->pcre2_pattern) {
		p->pcre2_match_data = pcre2_match_data_create_from_pattern(p->pcre2_pattern, p->pcre2_general_context);
		if (!p->pcre2_match_data)
			die("Couldn't allocate PCRE2 match data");
	} else {
		pcre2_get_error_message(error, errbuf, sizeof(errbuf));