1 files changed, 46 insertions, 0 deletions
diff --git a/src/utils.c b/src/utils.c
index 2425576..29fdd65 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -32,3 +32,49 @@ parse_int(char *string, char *arg)
 	}
 	return (int)val;
 }
+
+bool
+parse_color (char *hex, Color *c, int a)
+{
+	if ((strlen(hex) != 7) && (strlen(hex) != 9))
+		return false;
+
+	int len;
+	if (strlen(hex) == 9) {
+		len = 4;
+	} else {
+		len = 3;
+	}
+
+	hex++;
+	int colors[4];
+	for (int i = 0; i < len; hex += 2, i++) {
+		char color[3];
+		strlcpy(color, hex, 3);
+
+		char *endptr;
+		errno = 0;
+		long val = strtol(color, &endptr, 16);
+		if (errno != 0) {
+			perror("strtol");
+			exit(-2);
+		}
+		if (endptr == color) {
+			fprintf(stderr, "No valid hex color found\n");
+			exit(-2);
+		}
+
+		colors[i] = (int)val;
+	}
+
+	c->r = colors[0];
+	c->g = colors[1];
+	c->b = colors[2];
+	if (len == 4) {
+		c->a = colors[3];
+	} else {
+		c->a = a;
+	}
+
+	return true;
+}