unsigned int atoh(char * buf)
{
unsigned int retval = 0;
char * cp;
char digit;
cp = buf;
/* skip past spaces and tabs */
while (*cp == ' ' || *cp == 9)
cp++;
/* while we see digits and the optional 'x' */
while (ishexdigit(digit = *cp++) || (digit == 'x'))
{
/* its questionable what we should do with input like '1x234',
* or for that matter '1x2x3', what this does is ignore all
*/
if (digit == 'x')
retval = 0;
else
retval = (retval << 4) + hexnibble(digit);
}
return retval;
}
static int
hex2bin(uint8_t *buf, size_t buflen, const char *str)
{
int hi, lo;
while(*str) {
if(buflen == 0)
return -1;
if((hi = hexnibble(*str++)) == -1)
return -1;
if((lo = hexnibble(*str++)) == -1)
return -1;
*buf++ = hi << 4 | lo;
buflen--;
}
return 0;
}
static uint32_t
makecolor(const char *str)
{
uint8_t r, g, b;
if(*str == '#')
str++;
if(strlen(str) == 3) {
r = hexnibble(str[0]) * 0x11;
g = hexnibble(str[1]) * 0x11;
b = hexnibble(str[2]) * 0x11;
} else if(strlen(str) == 6) {
r = (hexnibble(str[0]) << 4) | hexnibble(str[1]);
g = (hexnibble(str[2]) << 4) | hexnibble(str[3]);
b = (hexnibble(str[4]) << 4) | hexnibble(str[5]);
} else
return 0;
return b << 16 | g << 8 | r;
}
static int
parse_bgr(const char *str)
{
int bgr;
if(*str == '#')
str++;
if(strlen(str) == 6) {
bgr = hexnibble(str[0]) << 4;
bgr |= hexnibble(str[1]);
bgr |= hexnibble(str[2]) << 12;
bgr |= hexnibble(str[3]) << 8;
bgr |= hexnibble(str[4]) << 20;
bgr |= hexnibble(str[5]) << 16;
return bgr;
}
return 0;
}