5 static int git_use_color_default = GIT_COLOR_AUTO;
6 int color_stdout_is_tty = -1;
9 * The list of available column colors.
11 const char *column_colors_ansi[] = {
20 GIT_COLOR_BOLD_YELLOW,
22 GIT_COLOR_BOLD_MAGENTA,
27 /* Ignore the RESET at the end when giving the size */
28 const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
30 /* An individual foreground or background color. */
33 COLOR_UNSPECIFIED = 0,
35 COLOR_ANSI, /* basic 0-7 ANSI colors */
39 /* The numeric value for ANSI and 256-color modes */
41 /* 24-bit RGB color values */
42 unsigned char red, green, blue;
46 * "word" is a buffer of length "len"; does it match the NUL-terminated
49 static int match_word(const char *word, int len, const char *match)
51 return !strncasecmp(word, match, len) && !match[len];
54 static int get_hex_color(const char *in, unsigned char *out)
57 val = (hexval(in[0]) << 4) | hexval(in[1]);
64 static int parse_color(struct color *out, const char *name, int len)
66 /* Positions in array must match ANSI color codes */
67 static const char * const color_names[] = {
68 "black", "red", "green", "yellow",
69 "blue", "magenta", "cyan", "white"
75 /* First try the special word "normal"... */
76 if (match_word(name, len, "normal")) {
77 out->type = COLOR_NORMAL;
81 /* Try a 24-bit RGB value */
82 if (len == 7 && name[0] == '#') {
83 if (!get_hex_color(name + 1, &out->red) &&
84 !get_hex_color(name + 3, &out->green) &&
85 !get_hex_color(name + 5, &out->blue)) {
86 out->type = COLOR_RGB;
91 /* Then pick from our human-readable color names... */
92 for (i = 0; i < ARRAY_SIZE(color_names); i++) {
93 if (match_word(name, len, color_names[i])) {
94 out->type = COLOR_ANSI;
100 /* And finally try a literal 256-color-mode number */
101 val = strtol(name, &end, 10);
102 if (end - name == len) {
104 * Allow "-1" as an alias for "normal", but other negative
108 ; /* fall through to error */
110 out->type = COLOR_NORMAL;
112 /* Rewrite low numbers as more-portable standard colors. */
113 } else if (val < 8) {
114 out->type = COLOR_ANSI;
117 } else if (val < 256) {
118 out->type = COLOR_256;
127 static int parse_attr(const char *name, size_t len)
129 static const struct {
134 #define ATTR(x, val, neg) { (x), sizeof(x)-1, (val), (neg) }
137 ATTR("italic", 3, 23),
139 ATTR("blink", 5, 25),
140 ATTR("reverse", 7, 27),
141 ATTR("strike", 9, 29)
147 if (skip_prefix_mem(name, len, "no", &name, &len)) {
148 skip_prefix_mem(name, len, "-", &name, &len);
152 for (i = 0; i < ARRAY_SIZE(attrs); i++) {
153 if (attrs[i].len == len && !memcmp(attrs[i].name, name, len))
154 return negate ? attrs[i].neg : attrs[i].val;
159 int color_parse(const char *value, char *dst)
161 return color_parse_mem(value, strlen(value), dst);
165 * Write the ANSI color codes for "c" to "out"; the string should
166 * already have the ANSI escape code in it. "out" should have enough
167 * space in it to fit any color.
169 static char *color_output(char *out, int len, const struct color *c, char type)
172 case COLOR_UNSPECIFIED:
177 BUG("color parsing ran out of space");
179 *out++ = '0' + c->value;
182 out += xsnprintf(out, len, "%c8;5;%d", type, c->value);
185 out += xsnprintf(out, len, "%c8;2;%d;%d;%d", type,
186 c->red, c->green, c->blue);
192 static int color_empty(const struct color *c)
194 return c->type <= COLOR_NORMAL;
197 int color_parse_mem(const char *value, int value_len, char *dst)
199 const char *ptr = value;
201 char *end = dst + COLOR_MAXLEN;
202 unsigned int attr = 0;
203 struct color fg = { COLOR_UNSPECIFIED };
204 struct color bg = { COLOR_UNSPECIFIED };
206 while (len > 0 && isspace(*ptr)) {
216 if (!strncasecmp(ptr, "reset", len)) {
217 xsnprintf(dst, end - dst, GIT_COLOR_RESET);
221 /* [fg [bg]] [attr]... */
223 const char *word = ptr;
224 struct color c = { COLOR_UNSPECIFIED };
225 int val, wordlen = 0;
227 while (len > 0 && !isspace(word[wordlen])) {
232 ptr = word + wordlen;
233 while (len > 0 && isspace(*ptr)) {
238 if (!parse_color(&c, word, wordlen)) {
239 if (fg.type == COLOR_UNSPECIFIED) {
243 if (bg.type == COLOR_UNSPECIFIED) {
249 val = parse_attr(word, wordlen);
257 #define OUT(x) do { \
259 BUG("color parsing ran out of space"); \
263 if (attr || !color_empty(&fg) || !color_empty(&bg)) {
270 for (i = 0; attr; i++) {
271 unsigned bit = (1 << i);
277 dst += xsnprintf(dst, end - dst, "%d", i);
279 if (!color_empty(&fg)) {
282 /* foreground colors are all in the 3x range */
283 dst = color_output(dst, end - dst, &fg, '3');
285 if (!color_empty(&bg)) {
288 /* background colors are all in the 4x range */
289 dst = color_output(dst, end - dst, &bg, '4');
296 return error(_("invalid color value: %.*s"), value_len, value);
300 int git_config_colorbool(const char *var, const char *value)
303 if (!strcasecmp(value, "never"))
305 if (!strcasecmp(value, "always"))
307 if (!strcasecmp(value, "auto"))
308 return GIT_COLOR_AUTO;
314 /* Missing or explicit false to turn off colorization */
315 if (!git_config_bool(var, value))
318 /* any normal truth value defaults to 'auto' */
319 return GIT_COLOR_AUTO;
322 static int check_auto_color(int fd)
324 static int color_stderr_is_tty = -1;
325 int *is_tty_p = fd == 1 ? &color_stdout_is_tty : &color_stderr_is_tty;
327 *is_tty_p = isatty(fd);
328 if (*is_tty_p || (fd == 1 && pager_in_use() && pager_use_color)) {
329 if (!is_terminal_dumb())
335 int want_color_fd(int fd, int var)
338 * NEEDSWORK: This function is sometimes used from multiple threads, and
339 * we end up using want_auto racily. That "should not matter" since
340 * we always write the same value, but it's still wrong. This function
341 * is listed in .tsan-suppressions for the time being.
344 static int want_auto[3] = { -1, -1, -1 };
347 var = git_use_color_default;
349 if (var == GIT_COLOR_AUTO) {
350 if (want_auto[fd] < 0)
351 want_auto[fd] = check_auto_color(fd);
352 return want_auto[fd];
357 int git_color_config(const char *var, const char *value, void *cb)
359 if (!strcmp(var, "color.ui")) {
360 git_use_color_default = git_config_colorbool(var, value);
367 int git_color_default_config(const char *var, const char *value, void *cb)
369 if (git_color_config(var, value, cb) < 0)
372 return git_default_config(var, value, cb);
375 void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
378 fprintf(fp, "%s", color);
379 fprintf(fp, "%s", sb->buf);
381 fprintf(fp, "%s", GIT_COLOR_RESET);
384 static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
385 va_list args, const char *trail)
390 r += fprintf(fp, "%s", color);
391 r += vfprintf(fp, fmt, args);
393 r += fprintf(fp, "%s", GIT_COLOR_RESET);
395 r += fprintf(fp, "%s", trail);
399 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
404 r = color_vfprintf(fp, color, fmt, args, NULL);
409 int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
414 r = color_vfprintf(fp, color, fmt, args, "\n");
419 int color_is_nil(const char *c)
421 return !strcmp(c, "NIL");