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tag: v1.7.12-rc2
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#include "cache.h"
#include "color.h"

static int git_use_color_default = 0;
int color_stdout_is_tty = -1;

/*
* The list of available column colors.
*/
const char *column_colors_ansi[] = {
GIT_COLOR_RED,
GIT_COLOR_GREEN,
GIT_COLOR_YELLOW,
GIT_COLOR_BLUE,
GIT_COLOR_MAGENTA,
GIT_COLOR_CYAN,
GIT_COLOR_BOLD_RED,
GIT_COLOR_BOLD_GREEN,
GIT_COLOR_BOLD_YELLOW,
GIT_COLOR_BOLD_BLUE,
GIT_COLOR_BOLD_MAGENTA,
GIT_COLOR_BOLD_CYAN,
GIT_COLOR_RESET,
};

/* Ignore the RESET at the end when giving the size */
const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;

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;
unsigned int attr = 0;
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 (0 <= val)
attr |= (1 << val);
else
goto bad;
}

if (attr || fg >= 0 || bg >= 0) {
int sep = 0;
int i;

*dst++ = '\033';
*dst++ = '[';

for (i = 0; attr; i++) {
unsigned bit = (1 << i);
if (!(attr & bit))
continue;
attr &= ~bit;
if (sep++)
*dst++ = ';';
*dst++ = '0' + i;
}
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)
{
if (value) {
if (!strcasecmp(value, "never"))
return 0;
if (!strcasecmp(value, "always"))
return 1;
if (!strcasecmp(value, "auto"))
return GIT_COLOR_AUTO;
}

if (!var)
return -1;

/* Missing or explicit false to turn off colorization */
if (!git_config_bool(var, value))
return 0;

/* any normal truth value defaults to 'auto' */
return GIT_COLOR_AUTO;
}

static int check_auto_color(void)
{
if (color_stdout_is_tty < 0)
color_stdout_is_tty = isatty(1);
if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) {
char *term = getenv("TERM");
if (term && strcmp(term, "dumb"))
return 1;
}
return 0;
}

int want_color(int var)
{
static int want_auto = -1;

if (var < 0)
var = git_use_color_default;

if (var == GIT_COLOR_AUTO) {
if (want_auto < 0)
want_auto = check_auto_color();
return want_auto;
}
return var;
}

int git_color_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "color.ui")) {
git_use_color_default = git_config_colorbool(var, value);
return 0;
}

return 0;
}

int git_color_default_config(const char *var, const char *value, void *cb)
{
if (git_color_config(var, value, cb) < 0)
return -1;

return git_default_config(var, value, cb);
}

void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb)
{
if (*color)
fprintf(fp, "%s", color);
fprintf(fp, "%s", sb->buf);
if (*color)
fprintf(fp, "%s", GIT_COLOR_RESET);
}

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;
}

int color_is_nil(const char *c)
{
return !strcmp(c, "NIL");
}
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