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authorJeff King <peff@peff.net>2006-09-08 04:03:18 -0400
committerJunio C Hamano <junkio@cox.net>2006-09-08 16:44:10 -0700
commit7c92fe0eaa4fb89e27fa3617b9ae52f20b511573 (patch)
treedaeaf172c4f6f5bc3a4d289550a2b13c31792f36 /color.c
parent0424558190fb85e6702e7c64cd2b11bc31d7be85 (diff)
downloadgit-7c92fe0eaa4fb89e27fa3617b9ae52f20b511573.tar.gz
Move color option parsing out of diff.c and into color.[ch]
The intent is to lib-ify colorizing code so it can be reused. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'color.c')
-rw-r--r--color.c176
1 files changed, 176 insertions, 0 deletions
diff --git a/color.c b/color.c
new file mode 100644
index 0000000000..d8c8399d59
--- /dev/null
+++ b/color.c
@@ -0,0 +1,176 @@
+#include "color.h"
+#include "cache.h"
+#include "git-compat-util.h"
+
+#include <stdarg.h>
+
+#define COLOR_RESET "\033[m"
+
+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 (*name && !*end && 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)
+{
+ const char *ptr = value;
+ int attr = -1;
+ int fg = -2;
+ int bg = -2;
+
+ if (!strcasecmp(value, "reset")) {
+ strcpy(dst, "\033[m");
+ return;
+ }
+
+ /* [fg [bg]] [attr] */
+ while (*ptr) {
+ const char *word = ptr;
+ int val, len = 0;
+
+ while (word[len] && !isspace(word[len]))
+ len++;
+
+ ptr = word + len;
+ while (*ptr && isspace(*ptr))
+ ptr++;
+
+ val = parse_color(word, len);
+ if (val >= -1) {
+ if (fg == -2) {
+ fg = val;
+ continue;
+ }
+ if (bg == -2) {
+ bg = val;
+ continue;
+ }
+ goto bad;
+ }
+ val = parse_attr(word, len);
+ 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 config value '%s' for variable '%s'", value, var);
+}
+
+int git_config_colorbool(const char *var, const char *value)
+{
+ if (!value)
+ return 1;
+ if (!strcasecmp(value, "auto")) {
+ if (isatty(1) || (pager_in_use && pager_use_color)) {
+ char *term = getenv("TERM");
+ if (term && strcmp(term, "dumb"))
+ return 1;
+ }
+ return 0;
+ }
+ if (!strcasecmp(value, "never"))
+ return 0;
+ if (!strcasecmp(value, "always"))
+ return 1;
+ return git_config_bool(var, value);
+}
+
+static int color_vprintf(const char *color, const char *fmt,
+ va_list args, const char *trail)
+{
+ int r = 0;
+
+ if (*color)
+ r += printf("%s", color);
+ r += vprintf(fmt, args);
+ if (*color)
+ r += printf("%s", COLOR_RESET);
+ if (trail)
+ r += printf("%s", trail);
+ return r;
+}
+
+
+
+int color_printf(const char *color, const char *fmt, ...)
+{
+ va_list args;
+ int r;
+ va_start(args, fmt);
+ r = color_vprintf(color, fmt, args, NULL);
+ va_end(args);
+ return r;
+}
+
+int color_printf_ln(const char *color, const char *fmt, ...)
+{
+ va_list args;
+ int r;
+ va_start(args, fmt);
+ r = color_vprintf(color, fmt, args, "\n");
+ va_end(args);
+ return r;
+}