From 6d04ac0835c3c5e065fefd27ce89024120652523 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <steinar+git@gunderson.no>
Date: Mon, 23 Aug 2021 20:29:23 +0200
Subject: [PATCH] Fix a warning with -Wvla (MB_CUR_MAX is not a compile-time
 constant).

---
 parse_trigrams.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/parse_trigrams.cpp b/parse_trigrams.cpp
index 678f520..9e72aac 100644
--- a/parse_trigrams.cpp
+++ b/parse_trigrams.cpp
@@ -3,6 +3,7 @@
 #include "unique_sort.h"
 
 #include <assert.h>
+#include <memory>
 #include <string.h>
 #include <wctype.h>
 
@@ -171,6 +172,7 @@ void parse_trigrams_ignore_case(const string &needle, vector<TrigramDisjunction>
 	// involving ICU or the likes.
 	mbtowc(nullptr, 0, 0);
 	const char *ptr = needle.c_str();
+	unique_ptr<char[]> buf(new char[MB_CUR_MAX]);
 	while (*ptr != '\0') {
 		wchar_t ch;
 		int ret = mbtowc(&ch, ptr, strlen(ptr));
@@ -179,17 +181,16 @@ void parse_trigrams_ignore_case(const string &needle, vector<TrigramDisjunction>
 			exit(1);
 		}
 
-		char buf[MB_CUR_MAX];
 		vector<string> alt;
 		alt.push_back(string(ptr, ret));
 		ptr += ret;
 		if (towlower(ch) != wint_t(ch)) {
-			ret = wctomb(buf, towlower(ch));
-			alt.push_back(string(buf, ret));
+			ret = wctomb(buf.get(), towlower(ch));
+			alt.push_back(string(buf.get(), ret));
 		}
 		if (towupper(ch) != wint_t(ch) && towupper(ch) != towlower(ch)) {
-			ret = wctomb(buf, towupper(ch));
-			alt.push_back(string(buf, ret));
+			ret = wctomb(buf.get(), towupper(ch));
+			alt.push_back(string(buf.get(), ret));
 		}
 		alternatives_for_cp.push_back(move(alt));
 	}
-- 
2.39.2