index-pack usage of mmap() is unacceptably slower on many OSes other than Linux
[git/git.git] / color.c
CommitLineData
7c92fe0e
JK
1#include "color.h"
2#include "cache.h"
3#include "git-compat-util.h"
4
5#include <stdarg.h>
6
7#define COLOR_RESET "\033[m"
8
9static int parse_color(const char *name, int len)
10{
11 static const char * const color_names[] = {
12 "normal", "black", "red", "green", "yellow",
13 "blue", "magenta", "cyan", "white"
14 };
15 char *end;
16 int i;
17 for (i = 0; i < ARRAY_SIZE(color_names); i++) {
18 const char *str = color_names[i];
19 if (!strncasecmp(name, str, len) && !str[len])
20 return i - 1;
21 }
22 i = strtol(name, &end, 10);
23 if (*name && !*end && i >= -1 && i <= 255)
24 return i;
25 return -2;
26}
27
28static int parse_attr(const char *name, int len)
29{
30 static const int attr_values[] = { 1, 2, 4, 5, 7 };
31 static const char * const attr_names[] = {
32 "bold", "dim", "ul", "blink", "reverse"
33 };
34 int i;
35 for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
36 const char *str = attr_names[i];
37 if (!strncasecmp(name, str, len) && !str[len])
38 return attr_values[i];
39 }
40 return -1;
41}
42
43void color_parse(const char *value, const char *var, char *dst)
44{
45 const char *ptr = value;
46 int attr = -1;
47 int fg = -2;
48 int bg = -2;
49
50 if (!strcasecmp(value, "reset")) {
51 strcpy(dst, "\033[m");
52 return;
53 }
54
55 /* [fg [bg]] [attr] */
56 while (*ptr) {
57 const char *word = ptr;
58 int val, len = 0;
59
60 while (word[len] && !isspace(word[len]))
61 len++;
62
63 ptr = word + len;
64 while (*ptr && isspace(*ptr))
65 ptr++;
66
67 val = parse_color(word, len);
68 if (val >= -1) {
69 if (fg == -2) {
70 fg = val;
71 continue;
72 }
73 if (bg == -2) {
74 bg = val;
75 continue;
76 }
77 goto bad;
78 }
79 val = parse_attr(word, len);
80 if (val < 0 || attr != -1)
81 goto bad;
82 attr = val;
83 }
84
85 if (attr >= 0 || fg >= 0 || bg >= 0) {
86 int sep = 0;
87
88 *dst++ = '\033';
89 *dst++ = '[';
90 if (attr >= 0) {
91 *dst++ = '0' + attr;
92 sep++;
93 }
94 if (fg >= 0) {
95 if (sep++)
96 *dst++ = ';';
97 if (fg < 8) {
98 *dst++ = '3';
99 *dst++ = '0' + fg;
100 } else {
101 dst += sprintf(dst, "38;5;%d", fg);
102 }
103 }
104 if (bg >= 0) {
105 if (sep++)
106 *dst++ = ';';
107 if (bg < 8) {
108 *dst++ = '4';
109 *dst++ = '0' + bg;
110 } else {
111 dst += sprintf(dst, "48;5;%d", bg);
112 }
113 }
114 *dst++ = 'm';
115 }
116 *dst = 0;
117 return;
118bad:
119 die("bad config value '%s' for variable '%s'", value, var);
120}
121
122int git_config_colorbool(const char *var, const char *value)
123{
124 if (!value)
125 return 1;
126 if (!strcasecmp(value, "auto")) {
127 if (isatty(1) || (pager_in_use && pager_use_color)) {
128 char *term = getenv("TERM");
129 if (term && strcmp(term, "dumb"))
130 return 1;
131 }
132 return 0;
133 }
134 if (!strcasecmp(value, "never"))
135 return 0;
136 if (!strcasecmp(value, "always"))
137 return 1;
138 return git_config_bool(var, value);
139}
140
141static int color_vprintf(const char *color, const char *fmt,
142 va_list args, const char *trail)
143{
144 int r = 0;
145
146 if (*color)
147 r += printf("%s", color);
148 r += vprintf(fmt, args);
149 if (*color)
150 r += printf("%s", COLOR_RESET);
151 if (trail)
152 r += printf("%s", trail);
153 return r;
154}
155
156
157
158int color_printf(const char *color, const char *fmt, ...)
159{
160 va_list args;
161 int r;
162 va_start(args, fmt);
163 r = color_vprintf(color, fmt, args, NULL);
164 va_end(args);
165 return r;
166}
167
168int color_printf_ln(const char *color, const char *fmt, ...)
169{
170 va_list args;
171 int r;
172 va_start(args, fmt);
173 r = color_vprintf(color, fmt, args, "\n");
174 va_end(args);
175 return r;
176}