Function diffcore_pickaxe

diffcore-pickaxe.c:231–292

}

void diffcore_pickaxe(struct diff_options *o)
{
	const char *needle = o->pickaxe;
	int opts = o->pickaxe_opts;
	regex_t regex, *regexp = NULL;
	kwset_t kws = NULL;
	pickaxe_fn fn;

	if (opts & ~DIFF_PICKAXE_KIND_OBJFIND &&
	    (!needle || !*needle))
		BUG("should have needle under -G or -S");
	if (opts & (DIFF_PICKAXE_REGEX | DIFF_PICKAXE_KIND_G)) {
		int cflags = REG_EXTENDED | REG_NEWLINE;
		if (o->pickaxe_opts & DIFF_PICKAXE_IGNORE_CASE)
			cflags |= REG_ICASE;
		regcomp_or_die(&regex, needle, cflags);
		regexp = &regex;

		if (opts & DIFF_PICKAXE_KIND_G)
			fn = diff_grep;
		else if (opts & DIFF_PICKAXE_REGEX)
			fn = has_changes;
		else
			/*
			 * We don't need to check the combination of
			 * -G and --pickaxe-regex, by the time we get
			 * here diff.c has already died if they're
			 * combined. See the usage tests in
			 * t4209-log-pickaxe.sh.
			 */
			BUG("unreachable");
	} else if (opts & DIFF_PICKAXE_KIND_S) {
		if (o->pickaxe_opts & DIFF_PICKAXE_IGNORE_CASE &&
		    has_non_ascii(needle)) {
			struct strbuf sb = STRBUF_INIT;
			int cflags = REG_NEWLINE | REG_ICASE;

			basic_regex_quote_buf(&sb, needle);
			regcomp_or_die(&regex, sb.buf, cflags);
			strbuf_release(&sb);
			regexp = &regex;
		} else {
			kws = kwsalloc(o->pickaxe_opts & DIFF_PICKAXE_IGNORE_CASE
				       ? tolower_trans_tbl : NULL);
			kwsincr(kws, needle, strlen(needle));
			kwsprep(kws);
		}
		fn = has_changes;
	} else if (opts & DIFF_PICKAXE_KIND_OBJFIND) {
		fn = NULL;
	} else {
		BUG("unknown pickaxe_opts flag");
	}

	pickaxe(&diff_queued_diff, o, regexp, kws, fn);

	if (regexp)
		regfree(regexp);