1 files changed, 32 insertions, 19 deletions

diff --git a/diffcore-pickaxe.c b/diffcore-pickaxe.c
index 7715c13ec4..9795ca1c15 100644
--- a/diffcore-pickaxe.c
+++ b/diffcore-pickaxe.c
@@ -7,6 +7,8 @@
 #include "diffcore.h"
 #include "xdiff-interface.h"
 #include "kwset.h"
+#include "commit.h"
+#include "quote.h"
 
 typedef int (*pickaxe_fn)(mmfile_t *one, mmfile_t *two,
 			  struct diff_options *o,
@@ -21,7 +23,6 @@ static void diffgrep_consume(void *priv, char *line, unsigned long len)
 {
 	struct diffgrep_cb *data = priv;
 	regmatch_t regmatch;
-	int hold;
 
 	if (line[0] != '+' && line[0] != '-')
 		return;
@@ -31,11 +32,8 @@ static void diffgrep_consume(void *priv, char *line, unsigned long len)
 		 * caller early.
 		 */
 		return;
-	/* Yuck -- line ought to be "const char *"! */
-	hold = line[len];
-	line[len] = '\0';
-	data->hit = !regexec(data->regexp, line + 1, 1, &regmatch, 0);
-	line[len] = hold;
+	data->hit = !regexec_buf(data->regexp, line + 1, len - 1, 1,
+				 &regmatch, 0);
 }
 
 static int diff_grep(mmfile_t *one, mmfile_t *two,
@@ -48,9 +46,11 @@ static int diff_grep(mmfile_t *one, mmfile_t *two,
 	xdemitconf_t xecfg;
 
 	if (!one)
-		return !regexec(regexp, two->ptr, 1, &regmatch, 0);
+		return !regexec_buf(regexp, two->ptr, two->size,
+				    1, &regmatch, 0);
 	if (!two)
-		return !regexec(regexp, one->ptr, 1, &regmatch, 0);
+		return !regexec_buf(regexp, one->ptr, one->size,
+				    1, &regmatch, 0);
 
 	/*
 	 * We have both sides; need to run textual diff and see if
@@ -81,8 +81,8 @@ static unsigned int contains(mmfile_t *mf, regex_t *regexp, kwset_t kws)
 		regmatch_t regmatch;
 		int flags = 0;
 
-		assert(data[sz] == '\0');
-		while (*data && !regexec(regexp, data, 1, &regmatch, flags)) {
+		while (*data &&
+		       !regexec_buf(regexp, data, sz, 1, &regmatch, flags)) {
 			flags |= REG_NOTBOL;
 			data += regmatch.rm_eo;
 			if (*data && regmatch.rm_so == regmatch.rm_eo)
@@ -198,6 +198,18 @@ static void pickaxe(struct diff_queue_struct *q, struct diff_options *o,
 	*q = outq;
 }
 
+static void regcomp_or_die(regex_t *regex, const char *needle, int cflags)
+{
+	int err = regcomp(regex, needle, cflags);
+	if (err) {
+		/* The POSIX.2 people are surely sick */
+		char errbuf[1024];
+		regerror(err, regex, errbuf, 1024);
+		regfree(regex);
+		die("invalid regex: %s", errbuf);
+	}
+}
+
 void diffcore_pickaxe(struct diff_options *o)
 {
 	const char *needle = o->pickaxe;
@@ -206,18 +218,19 @@ void diffcore_pickaxe(struct diff_options *o)
 	kwset_t kws = NULL;
 
 	if (opts & (DIFF_PICKAXE_REGEX | DIFF_PICKAXE_KIND_G)) {
-		int err;
 		int cflags = REG_EXTENDED | REG_NEWLINE;
 		if (DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE))
 			cflags |= REG_ICASE;
-		err = regcomp(&regex, needle, cflags);
-		if (err) {
-			/* The POSIX.2 people are surely sick */
-			char errbuf[1024];
-			regerror(err, &regex, errbuf, 1024);
-			regfree(&regex);
-			die("invalid regex: %s", errbuf);
-		}
+		regcomp_or_die(&regex, needle, cflags);
+		regexp = &regex;
+	} else if (DIFF_OPT_TST(o, 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(DIFF_OPT_TST(o, PICKAXE_IGNORE_CASE)