1 /** \file color.c Functions for printing colored messages. */
4 * Mostly taken from the git source tree, version 1.6.1.76, January 2009.
10 static int parse_color(const char *name, int len)
12 static const char * const color_names[] = {
13 "normal", "black", "red", "green", "yellow",
14 "blue", "magenta", "cyan", "white"
18 for (i = 0; i < ARRAY_SIZE(color_names); i++) {
19 const char *str = color_names[i];
20 if (!strncasecmp(name, str, len) && !str[len])
23 i = strtol(name, &end, 10);
24 if (end - name == len && i >= -1 && i <= 255)
29 static int parse_attr(const char *name, int len)
31 static const int attr_values[] = { 1, 2, 4, 5, 7 };
32 static const char * const attr_names[] = {
33 "bold", "dim", "ul", "blink", "reverse"
36 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
37 const char *str = attr_names[i];
38 if (!strncasecmp(name, str, len) && !str[len])
39 return attr_values[i];
45 * Create an escape sequence for colored output.
47 * \param value Human-readable color spec.
48 * \param dst Result pointer for the escape sequence.
50 * \return -1 on errors, 1 on success.
52 * Format of \a value: [fg [bg]] [attr].
54 int color_parse(const char *value, char *dst)
56 const char *ptr = value;
61 if (!strcasecmp(value, "reset")) {
62 strcpy(dst, COLOR_RESET);
66 /* [fg [bg]] [attr] */
68 const char *word = ptr;
71 while (word[len] && !para_isspace(word[len]))
75 while (*ptr && para_isspace(*ptr))
78 val = parse_color(word, len);
90 val = parse_attr(word, len);
91 if (val < 0 || attr != -1)
96 if (attr >= 0 || fg >= 0 || bg >= 0) {
112 dst += sprintf(dst, "38;5;%d", fg);
122 dst += sprintf(dst, "48;5;%d", bg);
130 PARA_ERROR_LOG("bad color value '%s'\n", value);