diff options
Diffstat (limited to 'diff.c')
| -rw-r--r-- | diff.c | 176 |
1 files changed, 119 insertions, 57 deletions
@@ -26,30 +26,14 @@ enum color_diff { DIFF_FILE_NEW = 5, }; -#define COLOR_NORMAL "" -#define COLOR_BOLD "\033[1m" -#define COLOR_DIM "\033[2m" -#define COLOR_UL "\033[4m" -#define COLOR_BLINK "\033[5m" -#define COLOR_REVERSE "\033[7m" -#define COLOR_RESET "\033[m" - -#define COLOR_BLACK "\033[30m" -#define COLOR_RED "\033[31m" -#define COLOR_GREEN "\033[32m" -#define COLOR_YELLOW "\033[33m" -#define COLOR_BLUE "\033[34m" -#define COLOR_MAGENTA "\033[35m" -#define COLOR_CYAN "\033[36m" -#define COLOR_WHITE "\033[37m" - -static const char *diff_colors[] = { - COLOR_RESET, - COLOR_NORMAL, - COLOR_BOLD, - COLOR_CYAN, - COLOR_RED, - COLOR_GREEN +/* "\033[1;38;5;2xx;48;5;2xxm\0" is 23 bytes */ +static char diff_colors[][24] = { + "\033[m", /* reset */ + "", /* normal */ + "\033[1m", /* bold */ + "\033[36m", /* cyan */ + "\033[31m", /* red */ + "\033[32m" /* green */ }; static int parse_diff_color_slot(const char *var, int ofs) @@ -67,38 +51,116 @@ static int parse_diff_color_slot(const char *var, int ofs) die("bad config variable '%s'", var); } -static const char *parse_diff_color_value(const char *value, const char *var) -{ - if (!strcasecmp(value, "normal")) - return COLOR_NORMAL; - if (!strcasecmp(value, "bold")) - return COLOR_BOLD; - if (!strcasecmp(value, "dim")) - return COLOR_DIM; - if (!strcasecmp(value, "ul")) - return COLOR_UL; - if (!strcasecmp(value, "blink")) - return COLOR_BLINK; - if (!strcasecmp(value, "reverse")) - return COLOR_REVERSE; - if (!strcasecmp(value, "reset")) - return COLOR_RESET; - if (!strcasecmp(value, "black")) - return COLOR_BLACK; - if (!strcasecmp(value, "red")) - return COLOR_RED; - if (!strcasecmp(value, "green")) - return COLOR_GREEN; - if (!strcasecmp(value, "yellow")) - return COLOR_YELLOW; - if (!strcasecmp(value, "blue")) - return COLOR_BLUE; - if (!strcasecmp(value, "magenta")) - return COLOR_MAGENTA; - if (!strcasecmp(value, "cyan")) - return COLOR_CYAN; - if (!strcasecmp(value, "white")) - return COLOR_WHITE; +static int parse_color(const char *name, int len) +{ + static const char * const color_names[] = { + "normal", "black", "red", "green", "yellow", + "blue", "magenta", "cyan", "white" + }; + char *end; + int i; + for (i = 0; i < ARRAY_SIZE(color_names); i++) { + const char *str = color_names[i]; + if (!strncasecmp(name, str, len) && !str[len]) + return i - 1; + } + i = strtol(name, &end, 10); + if (*name && !*end && i >= -1 && i <= 255) + return i; + return -2; +} + +static int parse_attr(const char *name, int len) +{ + static const int attr_values[] = { 1, 2, 4, 5, 7 }; + static const char * const attr_names[] = { + "bold", "dim", "ul", "blink", "reverse" + }; + int i; + for (i = 0; i < ARRAY_SIZE(attr_names); i++) { + const char *str = attr_names[i]; + if (!strncasecmp(name, str, len) && !str[len]) + return attr_values[i]; + } + return -1; +} + +static void parse_diff_color_value(const char *value, const char *var, char *dst) +{ + const char *ptr = value; + int attr = -1; + int fg = -2; + int bg = -2; + + if (!strcasecmp(value, "reset")) { + strcpy(dst, "\033[m"); + return; + } + + /* [fg [bg]] [attr] */ + while (*ptr) { + const char *word = ptr; + int val, len = 0; + + while (word[len] && !isspace(word[len])) + len++; + + ptr = word + len; + while (*ptr && isspace(*ptr)) + ptr++; + + val = parse_color(word, len); + if (val >= -1) { + if (fg == -2) { + fg = val; + continue; + } + if (bg == -2) { + bg = val; + continue; + } + goto bad; + } + val = parse_attr(word, len); + if (val < 0 || attr != -1) + goto bad; + attr = val; + } + + if (attr >= 0 || fg >= 0 || bg >= 0) { + int sep = 0; + + *dst++ = '\033'; + *dst++ = '['; + if (attr >= 0) { + *dst++ = '0' + attr; + sep++; + } + if (fg >= 0) { + if (sep++) + *dst++ = ';'; + if (fg < 8) { + *dst++ = '3'; + *dst++ = '0' + fg; + } else { + dst += sprintf(dst, "38;5;%d", fg); + } + } + if (bg >= 0) { + if (sep++) + *dst++ = ';'; + if (bg < 8) { + *dst++ = '4'; + *dst++ = '0' + bg; + } else { + dst += sprintf(dst, "48;5;%d", bg); + } + } + *dst++ = 'm'; + } + *dst = 0; + return; +bad: die("bad config value '%s' for variable '%s'", value, var); } @@ -145,7 +207,7 @@ int git_diff_ui_config(const char *var, const char *value) } if (!strncmp(var, "diff.color.", 11)) { int slot = parse_diff_color_slot(var, 11); - diff_colors[slot] = parse_diff_color_value(value, var); + parse_diff_color_value(value, var, diff_colors[slot]); return 0; } return git_default_config(var, value); |