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#include "cache.h"

#include "color.h"

int git_use_color_default = 0;

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, int stdout_is_tty)

{

if (value) {

if (!strcasecmp(value, "never"))

return 0;

if (!strcasecmp(value, "always"))

return 1;

if (!strcasecmp(value, "auto"))

goto auto_color;

}

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' */

auto_color:

if (stdout_is_tty < 0)

stdout_is_tty = isatty(1);

if (stdout_is_tty || (pager_in_use() && pager_use_color)) {

char *term = getenv("TERM");

if (term && strcmp(term, "dumb"))

return 1;

}

return 0;

}

int git_color_default_config(const char *var, const char *value, void *cb)

{

if (!strcmp(var, "color.ui")) {

git_use_color_default = git_config_colorbool(var, value, -1);

return 0;

}

return git_default_config(var, value, cb);

}

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;

}