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#include "cache.h" #include "color.h" int git_use_color_default = 0; 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 (end - name == len && 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; } void color_parse(const char *value, const char *var, char *dst) { color_parse_mem(value, strlen(value), var, dst); } void color_parse_mem(const char *value, int value_len, const char *var, char *dst) { const char *ptr = value; int len = value_len; int attr = -1; int fg = -2; int bg = -2; if (!strncasecmp(value, "reset", len)) { strcpy(dst, GIT_COLOR_RESET); return; } /* [fg [bg]] [attr] */ while (len > 0) { const char *word = ptr; int val, wordlen = 0; while (len > 0 && !isspace(word[wordlen])) { wordlen++; len--; } ptr = word + wordlen; while (len > 0 && isspace(*ptr)) { ptr++; len--; } val = parse_color(word, wordlen); if (val >= -1) { if (fg == -2) { fg = val; continue; } if (bg == -2) { bg = val; continue; } goto bad; } val = parse_attr(word, wordlen); 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 color value '%.*s' for variable '%s'", value_len, value, var); } int git_config_colorbool(const char *var, const char *value, int stdout_is_tty) { if (value) { if (!strcasecmp(value, "never")) return 0; if (!strcasecmp(value, "always")) return 1; if (!strcasecmp(value, "auto")) goto auto_color; } /* Missing or explicit false to turn off colorization */ if (!git_config_bool(var, value)) return 0; /* any normal truth value defaults to 'auto' */ auto_color: if (stdout_is_tty < 0) stdout_is_tty = isatty(1); if (stdout_is_tty || (pager_in_use() && pager_use_color)) { char *term = getenv("TERM"); if (term && strcmp(term, "dumb")) return 1; } return 0; } int git_color_default_config(const char *var, const char *value, void *cb) { if (!strcmp(var, "color.ui")) { git_use_color_default = git_config_colorbool(var, value, -1); return 0; } return git_default_config(var, value, cb); } static int color_vfprintf(FILE *fp, const char *color, const char *fmt, va_list args, const char *trail) { int r = 0; if (*color) r += fprintf(fp, "%s", color); r += vfprintf(fp, fmt, args); if (*color) r += fprintf(fp, "%s", GIT_COLOR_RESET); if (trail) r += fprintf(fp, "%s", trail); return r; } int color_fprintf(FILE *fp, const char *color, const char *fmt, ...) { va_list args; int r; va_start(args, fmt); r = color_vfprintf(fp, color, fmt, args, NULL); va_end(args); return r; } int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...) { va_list args; int r; va_start(args, fmt); r = color_vfprintf(fp, color, fmt, args, "\n"); va_end(args); return r; } /* * This function splits the buffer by newlines and colors the lines individually. * * Returns 0 on success. */ int color_fwrite_lines(FILE *fp, const char *color, size_t count, const char *buf) { if (!*color) return fwrite(buf, count, 1, fp) != 1; while (count) { char *p = memchr(buf, '\n', count); if (p != buf && (fputs(color, fp) < 0 || fwrite(buf, p ? p - buf : count, 1, fp) != 1 || fputs(GIT_COLOR_RESET, fp) < 0)) return -1; if (!p) return 0; if (fputc('\n', fp) < 0) return -1; count -= p + 1 - buf; buf = p + 1; } return 0; }
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