Imported Upstream version 2.13.7

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

diff --git a/color.c b/color.c
index 9027352..dee6155 100644 (file)
--- a/color.c
+++ b/color.c
@@ -123,19 +123,34 @@ static int parse_color(struct color *out, const char *name, int len)
        return -1;
 }
 
-static int parse_attr(const char *name, int len)
+static int parse_attr(const char *name, size_t len)
 {
-       static const int attr_values[] = { 1, 2, 4, 5, 7,
-                                          22, 22, 24, 25, 27 };
-       static const char * const attr_names[] = {
-               "bold", "dim", "ul", "blink", "reverse",
-               "nobold", "nodim", "noul", "noblink", "noreverse"
+       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;
-       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];
+
+       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;
 }
@@ -145,27 +160,34 @@ int color_parse(const char *value, char *dst)
        return color_parse_mem(value, strlen(value), dst);
 }
 
+void color_set(char *dst, const char *color_bytes)
+{
+       xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes);
+}
+
 /*
  * 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, const struct color *c, char type)
+static char *color_output(char *out, int len, const struct color *c, char type)
 {
        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;
                break;
        case COLOR_256:
-               out += sprintf(out, "%c8;5;%d", type, c->value);
+               out += xsnprintf(out, len, "%c8;5;%d", type, c->value);
                break;
        case COLOR_RGB:
-               out += sprintf(out, "%c8;2;%d;%d;%d", type,
-                              c->red, c->green, c->blue);
+               out += xsnprintf(out, len, "%c8;2;%d;%d;%d", type,
+                                c->red, c->green, c->blue);
                break;
        }
        return out;
@@ -180,19 +202,30 @@ 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 attr = 0;
        struct color fg = { COLOR_UNSPECIFIED };
        struct color bg = { COLOR_UNSPECIFIED };
 
-       if (!strncasecmp(value, "reset", len)) {
-               strcpy(dst, GIT_COLOR_RESET);
+       while (len > 0 && isspace(*ptr)) {
+               ptr++;
+               len--;
+       }
+
+       if (!len) {
+               dst[0] = '\0';
+               return 0;
+       }
+
+       if (!strncasecmp(ptr, "reset", len)) {
+               xsnprintf(dst, end - dst, GIT_COLOR_RESET);
                return 0;
        }
 
        /* [fg [bg]] [attr]... */
        while (len > 0) {
                const char *word = ptr;
-               struct color c;
+               struct color c = { COLOR_UNSPECIFIED };
                int val, wordlen = 0;
 
                while (len > 0 && !isspace(word[wordlen])) {
@@ -224,12 +257,19 @@ int color_parse_mem(const char *value, int value_len, char *dst)
                        goto bad;
        }
 
+#undef OUT
+#define OUT(x) do { \
+       if (dst == end) \
+               die("BUG: color parsing ran out of space"); \
+       *dst++ = (x); \
+} while(0)
+
        if (attr || !color_empty(&fg) || !color_empty(&bg)) {
                int sep = 0;
                int i;
 
-               *dst++ = '\033';
-               *dst++ = '[';
+               OUT('\033');
+               OUT('[');
 
                for (i = 0; attr; i++) {
                        unsigned bit = (1 << i);
@@ -237,27 +277,28 @@ int color_parse_mem(const char *value, int value_len, char *dst)
                                continue;
                        attr &= ~bit;
                        if (sep++)
-                               *dst++ = ';';
-                       dst += sprintf(dst, "%d", i);
+                               OUT(';');
+                       dst += xsnprintf(dst, end - dst, "%d", i);
                }
                if (!color_empty(&fg)) {
                        if (sep++)
-                               *dst++ = ';';
+                               OUT(';');
                        /* foreground colors are all in the 3x range */
-                       dst = color_output(dst, &fg, '3');
+                       dst = color_output(dst, end - dst, &fg, '3');
                }
                if (!color_empty(&bg)) {
                        if (sep++)
-                               *dst++ = ';';
+                               OUT(';');
                        /* background colors are all in the 4x range */
-                       dst = color_output(dst, &bg, '4');
+                       dst = color_output(dst, end - dst, &bg, '4');
                }
-               *dst++ = 'm';
+               OUT('m');
        }
-       *dst = 0;
+       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)