Merge branch 'maint-1.6.1' into maint
[git/kirr.git] / color.c
blobdb4dccfb77d80c9bd8981719fe2d0dc17c6772b6
1 #include "cache.h"
2 #include "color.h"
4 #define COLOR_RESET "\033[m"
6 int git_use_color_default = 0;
8 static int parse_color(const char *name, int len)
10 static const char * const color_names[] = {
11 "normal", "black", "red", "green", "yellow",
12 "blue", "magenta", "cyan", "white"
14 char *end;
15 int i;
16 for (i = 0; i < ARRAY_SIZE(color_names); i++) {
17 const char *str = color_names[i];
18 if (!strncasecmp(name, str, len) && !str[len])
19 return i - 1;
21 i = strtol(name, &end, 10);
22 if (end - name == len && i >= -1 && i <= 255)
23 return i;
24 return -2;
27 static int parse_attr(const char *name, int len)
29 static const int attr_values[] = { 1, 2, 4, 5, 7 };
30 static const char * const attr_names[] = {
31 "bold", "dim", "ul", "blink", "reverse"
33 int i;
34 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
35 const char *str = attr_names[i];
36 if (!strncasecmp(name, str, len) && !str[len])
37 return attr_values[i];
39 return -1;
42 void color_parse(const char *value, const char *var, char *dst)
44 color_parse_mem(value, strlen(value), var, dst);
47 void color_parse_mem(const char *value, int value_len, const char *var,
48 char *dst)
50 const char *ptr = value;
51 int len = value_len;
52 int attr = -1;
53 int fg = -2;
54 int bg = -2;
56 if (!strncasecmp(value, "reset", len)) {
57 strcpy(dst, "\033[m");
58 return;
61 /* [fg [bg]] [attr] */
62 while (len > 0) {
63 const char *word = ptr;
64 int val, wordlen = 0;
66 while (len > 0 && !isspace(word[wordlen])) {
67 wordlen++;
68 len--;
71 ptr = word + wordlen;
72 while (len > 0 && isspace(*ptr)) {
73 ptr++;
74 len--;
77 val = parse_color(word, wordlen);
78 if (val >= -1) {
79 if (fg == -2) {
80 fg = val;
81 continue;
83 if (bg == -2) {
84 bg = val;
85 continue;
87 goto bad;
89 val = parse_attr(word, wordlen);
90 if (val < 0 || attr != -1)
91 goto bad;
92 attr = val;
95 if (attr >= 0 || fg >= 0 || bg >= 0) {
96 int sep = 0;
98 *dst++ = '\033';
99 *dst++ = '[';
100 if (attr >= 0) {
101 *dst++ = '0' + attr;
102 sep++;
104 if (fg >= 0) {
105 if (sep++)
106 *dst++ = ';';
107 if (fg < 8) {
108 *dst++ = '3';
109 *dst++ = '0' + fg;
110 } else {
111 dst += sprintf(dst, "38;5;%d", fg);
114 if (bg >= 0) {
115 if (sep++)
116 *dst++ = ';';
117 if (bg < 8) {
118 *dst++ = '4';
119 *dst++ = '0' + bg;
120 } else {
121 dst += sprintf(dst, "48;5;%d", bg);
124 *dst++ = 'm';
126 *dst = 0;
127 return;
128 bad:
129 die("bad color value '%.*s' for variable '%s'", value_len, value, var);
132 int git_config_colorbool(const char *var, const char *value, int stdout_is_tty)
134 if (value) {
135 if (!strcasecmp(value, "never"))
136 return 0;
137 if (!strcasecmp(value, "always"))
138 return 1;
139 if (!strcasecmp(value, "auto"))
140 goto auto_color;
143 /* Missing or explicit false to turn off colorization */
144 if (!git_config_bool(var, value))
145 return 0;
147 /* any normal truth value defaults to 'auto' */
148 auto_color:
149 if (stdout_is_tty < 0)
150 stdout_is_tty = isatty(1);
151 if (stdout_is_tty || (pager_in_use() && pager_use_color)) {
152 char *term = getenv("TERM");
153 if (term && strcmp(term, "dumb"))
154 return 1;
156 return 0;
159 int git_color_default_config(const char *var, const char *value, void *cb)
161 if (!strcmp(var, "color.ui")) {
162 git_use_color_default = git_config_colorbool(var, value, -1);
163 return 0;
166 return git_default_config(var, value, cb);
169 static int color_vfprintf(FILE *fp, const char *color, const char *fmt,
170 va_list args, const char *trail)
172 int r = 0;
174 if (*color)
175 r += fprintf(fp, "%s", color);
176 r += vfprintf(fp, fmt, args);
177 if (*color)
178 r += fprintf(fp, "%s", COLOR_RESET);
179 if (trail)
180 r += fprintf(fp, "%s", trail);
181 return r;
186 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...)
188 va_list args;
189 int r;
190 va_start(args, fmt);
191 r = color_vfprintf(fp, color, fmt, args, NULL);
192 va_end(args);
193 return r;
196 int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...)
198 va_list args;
199 int r;
200 va_start(args, fmt);
201 r = color_vfprintf(fp, color, fmt, args, "\n");
202 va_end(args);
203 return r;
207 * This function splits the buffer by newlines and colors the lines individually.
209 * Returns 0 on success.
211 int color_fwrite_lines(FILE *fp, const char *color,
212 size_t count, const char *buf)
214 if (!*color)
215 return fwrite(buf, count, 1, fp) != 1;
216 while (count) {
217 char *p = memchr(buf, '\n', count);
218 if (p != buf && (fputs(color, fp) < 0 ||
219 fwrite(buf, p ? p - buf : count, 1, fp) != 1 ||
220 fputs(COLOR_RESET, fp) < 0))
221 return -1;
222 if (!p)
223 return 0;
224 if (fputc('\n', fp) < 0)
225 return -1;
226 count -= p + 1 - buf;
227 buf = p + 1;
229 return 0;