Imported Upstream version 2.30.0

[platform/upstream/git.git] / color.c

diff --git a/color.c b/color.c
index f277e72..64f52a4 100644 (file)
--- a/color.c
+++ b/color.c
@@ -24,6 +24,14 @@ const char *column_colors_ansi[] = {
        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;
 
@@ -61,15 +69,38 @@ static int get_hex_color(const char *in, unsigned char *out)
        return 0;
 }
 
-static int parse_color(struct color *out, const char *name, int len)
+/*
+ * 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"
        };
-       char *end;
        int i;
+       int color_offset = COLOR_FOREGROUND_ANSI;
+
+       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"... */
@@ -89,12 +120,8 @@ static int parse_color(struct color *out, const char *name, int len)
        }
 
        /* Then pick from our human-readable color names... */
-       for (i = 0; i < ARRAY_SIZE(color_names); i++) {
-               if (match_word(name, len, color_names[i])) {
-                       out->type = COLOR_ANSI;
-                       out->value = i;
-                       return 0;
-               }
+       if (parse_ansi_color(out, name, len) == 0) {
+               return 0;
        }
 
        /* And finally try a literal 256-color-mode number */
@@ -109,10 +136,15 @@ static int parse_color(struct color *out, const char *name, int len)
                else if (val < 0) {
                        out->type = COLOR_NORMAL;
                        return 0;
-               /* Rewrite low numbers as more-portable standard colors. */
+               /* Rewrite 0-7 as more-portable standard colors. */
                } else if (val < 8) {
                        out->type = COLOR_ANSI;
-                       out->value = val;
+                       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;
@@ -166,23 +198,26 @@ int color_parse(const char *value, char *dst)
  * 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, char type)
+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:
-               if (len < 2)
-                       die("BUG: color parsing ran out of space");
-               *out++ = type;
-               *out++ = '0' + c->value;
+               out += xsnprintf(out, len, "%d", c->value + offset);
                break;
        case COLOR_256:
-               out += xsnprintf(out, len, "%c8;5;%d", type, c->value);
+               out += xsnprintf(out, len, "%d;5;%d", COLOR_FOREGROUND_256 + offset,
+                                c->value);
                break;
        case COLOR_RGB:
-               out += xsnprintf(out, len, "%c8;2;%d;%d;%d", type,
+               out += xsnprintf(out, len, "%d;2;%d;%d;%d",
+                                COLOR_FOREGROUND_RGB + offset,
                                 c->red, c->green, c->blue);
                break;
        }
@@ -256,7 +291,7 @@ int color_parse_mem(const char *value, int value_len, char *dst)
 #undef OUT
 #define OUT(x) do { \
        if (dst == end) \
-               die("BUG: color parsing ran out of space"); \
+               BUG("color parsing ran out of space"); \
        *dst++ = (x); \
 } while(0)
 
@@ -279,14 +314,12 @@ int color_parse_mem(const char *value, int value_len, char *dst)
                if (!color_empty(&fg)) {
                        if (sep++)
                                OUT(';');
-                       /* foreground colors are all in the 3x range */
-                       dst = color_output(dst, end - dst, &fg, '3');
+                       dst = color_output(dst, end - dst, &fg, 0);
                }
                if (!color_empty(&bg)) {
                        if (sep++)
                                OUT(';');
-                       /* background colors are all in the 4x range */
-                       dst = color_output(dst, end - dst, &bg, '4');
+                       dst = color_output(dst, end - dst, &bg, 1);
                }
                OUT('m');
        }
@@ -319,18 +352,20 @@ int git_config_colorbool(const char *var, const char *value)
        return GIT_COLOR_AUTO;
 }
 
-static int check_auto_color(void)
+static int check_auto_color(int fd)
 {
-       if (color_stdout_is_tty < 0)
-               color_stdout_is_tty = isatty(1);
-       if (color_stdout_is_tty || (pager_in_use() && pager_use_color)) {
+       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(int var)
+int want_color_fd(int fd, int var)
 {
        /*
         * NEEDSWORK: This function is sometimes used from multiple threads, and
@@ -339,15 +374,18 @@ int want_color(int var)
         * is listed in .tsan-suppressions for the time being.
         */
 
-       static int want_auto = -1;
+       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 < 0)
-                       want_auto = check_auto_color();
-               return want_auto;
+               if (want_auto[fd] < 0)
+                       want_auto[fd] = check_auto_color(fd);
+               return want_auto[fd];
        }
        return var;
 }