diff options
Diffstat (limited to 'utf8.c')
| -rw-r--r-- | utf8.c | 27 |
1 files changed, 21 insertions, 6 deletions
@@ -3,8 +3,6 @@ /* This code is originally from http://www.cl.cam.ac.uk/~mgk25/ucs/ */ -typedef unsigned int ucs_char_t; /* assuming 32bit int */ - struct interval { int first; int last; @@ -153,11 +151,14 @@ static int git_wcwidth(ucs_char_t ch) } /* - * This function returns the number of columns occupied by the character - * pointed to by the variable start. The pointer is updated to point at - * the next character. If it was not valid UTF-8, the pointer is set to NULL. + * Pick one ucs character starting from the location *start points at, + * and return it, while updating the *start pointer to point at the + * end of that character. + * + * If the string was not a valid UTF-8, *start pointer is set to NULL + * and the return value is undefined. */ -int utf8_width(const char **start) +ucs_char_t pick_one_utf8_char(const char **start) { unsigned char *s = (unsigned char *)*start; ucs_char_t ch; @@ -208,6 +209,20 @@ invalid: return 0; } + return ch; +} + +/* + * This function returns the number of columns occupied by the character + * pointed to by the variable start. The pointer is updated to point at + * the next character. If it was not valid UTF-8, the pointer is set to + * NULL. + */ +int utf8_width(const char **start) +{ + ucs_char_t ch = pick_one_utf8_char(start); + if (!*start) + return 0; return git_wcwidth(ch); } |