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#include "cache.h"
#include "config.h"
#include "color.h"
static int git_use_color_default = GIT_COLOR_AUTO;
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,
};
enum {
COLOR_BACKGROUND_OFFSET = 10,
COLOR_FOREGROUND_ANSI = 30,
COLOR_FOREGROUND_RGB = 38,
COLOR_FOREGROUND_256 = 38,
COLOR_FOREGROUND_BRIGHT_ANSI = 90,
};
/* Ignore the RESET at the end when giving the size */
const int column_colors_ansi_max = ARRAY_SIZE(column_colors_ansi) - 1;
/* An individual foreground or background color. */
struct color {
enum {
COLOR_UNSPECIFIED = 0,
COLOR_NORMAL,
COLOR_ANSI, /* basic 0-7 ANSI colors + "default" (value = 9) */
COLOR_256,
COLOR_RGB
} type;
/* The numeric value for ANSI and 256-color modes */
unsigned char value;
/* 24-bit RGB color values */
unsigned char red, green, blue;
};
/*
* "word" is a buffer of length "len"; does it match the NUL-terminated
* "match" exactly?
*/
static int match_word(const char *word, int len, const char *match)
{
return !strncasecmp(word, match, len) && !match[len];
}
static int get_hex_color(const char *in, unsigned char *out)
{
unsigned int val;
val = (hexval(in[0]) << 4) | hexval(in[1]);
if (val & ~0xff)
return -1;
*out = val;
return 0;
}
/*
* If an ANSI color is recognized in "name", fill "out" and return 0.
* Otherwise, leave out unchanged and return -1.
*/
static int parse_ansi_color(struct color *out, const char *name, int len)
{
/* Positions in array must match ANSI color codes */
static const char * const color_names[] = {
"black", "red", "green", "yellow",
"blue", "magenta", "cyan", "white"
};
int i;
int color_offset = COLOR_FOREGROUND_ANSI;
if (match_word(name, len, "default")) {
/*
* Restores to the terminal's default color, which may not be
* the same as explicitly setting "white" or "black".
*
* ECMA-48 - Control Functions \
* for Coded Character Sets, 5th edition (June 1991):
* > 39 default display colour (implementation-defined)
* > 49 default background colour (implementation-defined)
*
* Although not supported /everywhere/--according to terminfo,
* some terminals define "op" (original pair) as a blunt
* "set to white on black", or even "send full SGR reset"--
* it's standard and well-supported enough that if a user
* asks for it in their config this will do the right thing.
*/
out->type = COLOR_ANSI;
out->value = 9 + color_offset;
return 0;
}
if (strncasecmp(name, "bright", 6) == 0) {
color_offset = COLOR_FOREGROUND_BRIGHT_ANSI;
name += 6;
len -= 6;
}
for (i = 0; i < ARRAY_SIZE(color_names); i++) {
if (match_word(name, len, color_names[i])) {
out->type = COLOR_ANSI;
out->value = i + color_offset;
return 0;
}
}
return -1;
}
static int parse_color(struct color *out, const char *name, int len)
{
char *end;
long val;
/* First try the special word "normal"... */
if (match_word(name, len, "normal")) {
out->type = COLOR_NORMAL;
return 0;
}
/* Try a 24-bit RGB value */
if (len == 7 && name[0] == '#') {
if (!get_hex_color(name + 1, &out->red) &&
!get_hex_color(name + 3, &out->green) &&
!get_hex_color(name + 5, &out->blue)) {
out->type = COLOR_RGB;
return 0;
}
}
/* Then pick from our human-readable color names... */
if (parse_ansi_color(out, name, len) == 0) {
return 0;
}
/* And finally try a literal 256-color-mode number */
val = strtol(name, &end, 10);
if (end - name == len) {
/*
* Allow "-1" as an alias for "normal", but other negative
* numbers are bogus.
*/
if (val < -1)
; /* fall through to error */
else if (val < 0) {
out->type = COLOR_NORMAL;
return 0;
/* Rewrite 0-7 as more-portable standard colors. */
} else if (val < 8) {
out->type = COLOR_ANSI;
out->value = val + COLOR_FOREGROUND_ANSI;
return 0;
/* Rewrite 8-15 as more-portable aixterm colors. */
} else if (val < 16) {
out->type = COLOR_ANSI;
out->value = val - 8 + COLOR_FOREGROUND_BRIGHT_ANSI;
return 0;
} else if (val < 256) {
out->type = COLOR_256;
out->value = val;
return 0;
}
}
return -1;
}
static int parse_attr(const char *name, size_t len)
{
static const struct {
const char *name;
size_t len;
int val, neg;
} attrs[] = {
#define ATTR(x, val, neg) { (x), sizeof(x)-1, (val), (neg) }
ATTR("bold", 1, 22),
ATTR("dim", 2, 22),
ATTR("italic", 3, 23),
ATTR("ul", 4, 24),
ATTR("blink", 5, 25),
ATTR("reverse", 7, 27),
ATTR("strike", 9, 29)
#undef ATTR
};
int negate = 0;
int i;
if (skip_prefix_mem(name, len, "no", &name, &len)) {
skip_prefix_mem(name, len, "-", &name, &len);
negate = 1;
}
for (i = 0; i < ARRAY_SIZE(attrs); i++) {
if (attrs[i].len == len && !memcmp(attrs[i].name, name, len))
return negate ? attrs[i].neg : attrs[i].val;
}
return -1;
}
int color_parse(const char *value, char *dst)
{
return color_parse_mem(value, strlen(value), dst);
}
/*
* Write the ANSI color codes for "c" to "out"; the string should
* already have the ANSI escape code in it. "out" should have enough
* space in it to fit any color.
*/
static char *color_output(char *out, int len, const struct color *c, int background)
{
int offset = 0;
if (background)
offset = COLOR_BACKGROUND_OFFSET;
switch (c->type) {
case COLOR_UNSPECIFIED:
case COLOR_NORMAL:
break;
case COLOR_ANSI:
out += xsnprintf(out, len, "%d", c->value + offset);
break;
case COLOR_256:
out += xsnprintf(out, len, "%d;5;%d", COLOR_FOREGROUND_256 + offset,
c->value);
break;
case COLOR_RGB:
out += xsnprintf(out, len, "%d;2;%d;%d;%d",
COLOR_FOREGROUND_RGB + offset,
c->red, c->green, c->blue);
break;
}
return out;
}
static int color_empty(const struct color *c)
{
return c->type <= COLOR_NORMAL;
}
int color_parse_mem(const char *value, int value_len, char *dst)
{
const char *ptr = value;
int len = value_len;
char *end = dst + COLOR_MAXLEN;
unsigned int has_reset = 0;
unsigned int attr = 0;
struct color fg = { COLOR_UNSPECIFIED };
struct color bg = { COLOR_UNSPECIFIED };
while (len > 0 && isspace(*ptr)) {
ptr++;
len--;
}
if (!len) {
dst[0] = '\0';
return 0;
}
/* [reset] [fg [bg]] [attr]... */
while (len > 0) {
const char *word = ptr;
struct color c = { COLOR_UNSPECIFIED };
int val, wordlen = 0;
while (len > 0 && !isspace(word[wordlen])) {
wordlen++;
len--;
}
ptr = word + wordlen;
while (len > 0 && isspace(*ptr)) {
ptr++;
len--;
}
if (match_word(word, wordlen, "reset")) {
has_reset = 1;
continue;
}
if (!parse_color(&c, word, wordlen)) {
if (fg.type == COLOR_UNSPECIFIED) {
fg = c;
continue;
}
if (bg.type == COLOR_UNSPECIFIED) {
bg = c;
continue;
}
goto bad;
}
val = parse_attr(word, wordlen);
if (0 <= val)
attr |= (1 << val);
else
goto bad;
}
#undef OUT
#define OUT(x) do { \
if (dst == end) \
BUG("color parsing ran out of space"); \
*dst++ = (x); \
} while(0)
if (has_reset || attr || !color_empty(&fg) || !color_empty(&bg)) {
int sep = 0;
int i;
OUT('\033');
OUT('[');
if (has_reset)
sep++;
for (i = 0; attr; i++) {
unsigned bit = (1 << i);
if (!(attr & bit))
continue;
attr &= ~bit;
if (sep++)
OUT(';');
dst += xsnprintf(dst, end - dst, "%d", i);
}
if (!color_empty(&fg)) {
if (sep++)
OUT(';');
dst = color_output(dst, end - dst, &fg, 0);
}
if (!color_empty(&bg)) {
if (sep++)
OUT(';');
dst = color_output(dst, end - dst, &bg, 1);
}
OUT('m');
}
OUT(0);
return 0;
bad:
return error(_("invalid color value: %.*s"), value_len, value);
#undef OUT
}
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(int fd)
{
static int color_stderr_is_tty = -1;
int *is_tty_p = fd == 1 ? &color_stdout_is_tty : &color_stderr_is_tty;
if (*is_tty_p < 0)
*is_tty_p = isatty(fd);
if (*is_tty_p || (fd == 1 && pager_in_use() && pager_use_color)) {
if (!is_terminal_dumb())
return 1;
}
return 0;
}
int want_color_fd(int fd, int var)
{
/*
* NEEDSWORK: This function is sometimes used from multiple threads, and
* we end up using want_auto racily. That "should not matter" since
* we always write the same value, but it's still wrong. This function
* is listed in .tsan-suppressions for the time being.
*/
static int want_auto[3] = { -1, -1, -1 };
if (fd < 1 || fd >= ARRAY_SIZE(want_auto))
BUG("file descriptor out of range: %d", fd);
if (var < 0)
var = git_use_color_default;
if (var == GIT_COLOR_AUTO) {
if (want_auto[fd] < 0)
want_auto[fd] = check_auto_color(fd);
return want_auto[fd];
}
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");
}