struct scanner_token *
skip_scanner_tokens(struct scanner *scanner, int skipto, int precedence)
{
struct scanner_token *token = get_scanner_token(scanner);
/* Skip tokens while handling some basic precedens of special chars
* so we don't skip to long. */
while (token) {
if (token->type == skipto
|| token->precedence > precedence)
break;
token = get_next_scanner_token(scanner);
}
return (token && token->type == skipto)
? get_next_scanner_token(scanner) : NULL;
}
int
css_parse_color_value(struct css_property_info *propinfo,
union css_property_value *value,
struct scanner *scanner)
{
struct scanner_token *token = get_scanner_token(scanner);
assert(propinfo->value_type == CSS_VT_COLOR);
if (token->type == CSS_TOKEN_RGB) {
/* RGB function */
int shift;
token = get_next_scanner_token(scanner);
/* First color component is shifted 16, next is shifted 8 and
* last is not shifted. */
for (shift = 16; token && shift >= 0; shift -= 8) {
/* The first two args are terminated by ',' and the
* last one by ')'. */
unsigned char paskynator = shift ? ',' : ')';
const unsigned char *nstring = token->string;
int part;
/* Are the current and next token valid? */
if ((token->type != CSS_TOKEN_NUMBER
&& token->type != CSS_TOKEN_PERCENTAGE)
|| !check_next_scanner_token(scanner, paskynator))
return 0;
/* Parse the digit */
part = strtol(token->string, (char **) &nstring, 10);
if (token->string == nstring)
return 0;
/* Adjust percentage values */
if (token->type == CSS_TOKEN_PERCENTAGE) {
int_bounds(&part, 0, 100);
part *= 255;
part /= 100;
}
/* Adjust color component value and add it */
int_bounds(&part, 0, 255);
value->color |= part << shift;
/* Paskynate the token arg and separator */
token = skip_css_tokens(scanner, paskynator);
}
return 1;
}
/* Just a color value we already know how to parse. */
if (token->type != CSS_TOKEN_IDENT
&& token->type != CSS_TOKEN_HEX_COLOR)
return 0;
if (decode_color(token->string, token->length, &value->color) < 0) {
return 0;
}
skip_css_tokens(scanner, token->type);
return 1;
}
