1 files changed, 79 insertions, 0 deletions
diff --git a/colors.h b/colors.h
new file mode 100644
index 0000000..297e6d2
--- /dev/null
+++ b/colors.h
@@ -0,0 +1,79 @@
+ENUM_U16 {
+	COLOR_UNKNOWN,
+
+	COLOR_BG,
+	COLOR_CURSOR,
+	COLOR_CURSOR_LINE_BG,
+	COLOR_BORDER,
+	COLOR_TEXT,
+	COLOR_SELECTION_BG,
+
+	COLOR_COUNT
+} ENUM_U16_END(ColorSetting);
+
+typedef struct {
+	ColorSetting setting;
+	char const *name;
+} ColorName;
+
+static ColorName const color_names[COLOR_COUNT] = {
+	{COLOR_UNKNOWN, "unknown"},
+	{COLOR_BG, "bg"},
+	{COLOR_CURSOR, "cursor"},
+	{COLOR_CURSOR_LINE_BG, "cursor-line-bg"},
+	{COLOR_BORDER, "border"},
+	{COLOR_TEXT, "text"},
+	{COLOR_SELECTION_BG, "selection-bg"}
+};
+
+static ColorSetting color_setting_from_str(char const *str) {
+	// @OPTIM: sort color_names, binary search
+	for (int i = 0; i < COLOR_COUNT; ++i) {
+		ColorName const *n = &color_names[i];
+		if (streq(n->name, str))
+			return n->setting;
+	}
+	return COLOR_UNKNOWN;
+}
+
+static char const *color_setting_to_str(ColorSetting s) {
+	for (int i = 0; i < COLOR_COUNT; ++i) {
+		ColorName const *n = &color_names[i];
+		if (n->setting == s)
+			return n->name;
+	}
+	return "???";
+}
+
+// converts #rrggbb/#rrggbbaa to a color. returns false if it's not in the right format.
+static Status color_from_str(char const *str, u32 *color) {
+	uint r = 0, g = 0, b = 0, a = 0xff;
+	bool success = false;
+	switch (strlen(str)) {
+	case 4:
+		success = sscanf(str, "#%01x%01x%01x", &r, &g, &b) == 3;
+		// extend single hex digit to double hex digit
+		r |= r << 4;
+		g |= g << 4;
+		b |= b << 4;
+		break;
+	case 5:
+		success = sscanf(str, "#%01x%01x%01x%01x", &r, &g, &b, &a) == 4;
+		r |= r << 4;
+		g |= g << 4;
+		b |= b << 4;
+		a |= a << 4;
+		break;
+	case 7:
+		success = sscanf(str, "#%02x%02x%02x", &r, &g, &b) == 3;
+		break;
+	case 9:
+		success = sscanf(str, "#%02x%02x%02x%02x", &r, &g, &b, &a) == 4;
+		break;
+	}
+	if (!success || r > 0xff || g > 0xff || b > 0xff || a > 0xff)
+		return false;
+	if (color)
+		*color = (u32)r << 24 | (u32)g << 16 | (u32)b << 8 | (u32)a;
+	return true;
+}