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#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "color.h"
#include "log.h"
struct color hex_to_color(const char *hex)
{
if (hex[0] == '#') {
hex++;
}
uint32_t val = 0;
int64_t tmp;
size_t len = strlen(hex);
errno = 0;
if (len == 3) {
char str[] = {
hex[0], hex[0],
hex[1], hex[1],
hex[2], hex[2],
'\0'};
char *endptr;
tmp = strtol(str, &endptr, 16);
if (errno || *endptr != '\0' || tmp < 0) {
return (struct color) { -1, -1, -1, -1 };
}
val = tmp;
val <<= 8;
val |= 0xFFu;
} else if (len == 4) {
char str[] = {
hex[0], hex[0],
hex[1], hex[1],
hex[2], hex[2],
hex[3], hex[3],
'\0'};
char *endptr;
tmp = strtol(str, &endptr, 16);
if (errno || *endptr != '\0' || tmp < 0) {
return (struct color) { -1, -1, -1, -1 };
}
val = tmp;
} else if (len == 6) {
char *endptr;
tmp = strtol(hex, &endptr, 16);
if (errno || *endptr != '\0' || tmp < 0) {
return (struct color) { -1, -1, -1, -1 };
}
val = tmp;
val <<= 8;
val |= 0xFFu;
} else if (len == 8) {
char *endptr;
tmp = strtol(hex, &endptr, 16);
if (errno || *endptr != '\0' || tmp < 0) {
return (struct color) { -1, -1, -1, -1 };
}
val = tmp;
} else {
return (struct color) { -1, -1, -1, -1 };
}
return (struct color) {
.r = (float)((val & 0xFF000000u) >> 24) / 255.0f,
.g = (float)((val & 0x00FF0000u) >> 16) / 255.0f,
.b = (float)((val & 0x0000FF00u) >> 8) / 255.0f,
.a = (float)((val & 0x000000FFu) >> 0) / 255.0f,
};
}
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