Commit 2bc1e7ec authored by Duy Nguyen's avatar Duy Nguyen Committed by Junio C Hamano

utf8.c: add utf8_strnwidth() with the ability to skip ansi sequences

Signed-off-by: Duy Nguyen's avatarNguyễn Thái Ngọc Duy <>
Signed-off-by: default avatarJunio C Hamano <>
parent 4247fe79
......@@ -266,18 +266,26 @@ int utf8_width(const char **start, size_t *remainder_p)
* string, assuming that the string is utf8. Returns strlen() instead
* if the string does not look like a valid utf8 string.
int utf8_strwidth(const char *string)
int utf8_strnwidth(const char *string, int len, int skip_ansi)
int width = 0;
const char *orig = string;
while (1) {
if (!string)
return strlen(orig);
if (!*string)
return width;
if (len == -1)
len = strlen(string);
while (string && string < orig + len) {
int skip;
while (skip_ansi &&
(skip = display_mode_esc_sequence_len(string)) != 0)
string += skip;
width += utf8_width(&string, NULL);
return string ? width : len;
int utf8_strwidth(const char *string)
return utf8_strnwidth(string, -1, 0);
int is_utf8(const char *text)
......@@ -4,6 +4,7 @@
typedef unsigned int ucs_char_t; /* assuming 32bit int */
int utf8_width(const char **start, size_t *remainder_p);
int utf8_strnwidth(const char *string, int len, int skip_ansi);
int utf8_strwidth(const char *string);
int is_utf8(const char *text);
int is_encoding_utf8(const char *name);
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