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#include <assert.h>
#include <locale.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <uchar.h>
struct {
size_t ret;
char32_t c32;
uint8_t bytes[4];
} expected_results[] = {
{1, 0x7A, {0x7A, 0, 0, 0}},
{2, 0xDF, {0xC3, 0x9F, 0, 0}},
{3, 0x6C34, {0xE6, 0xB0, 0xB4, 0}},
{4, 0x1F34C, {0xF0, 0x9F, 0x8D, 0x8C}},
};
int main() {
setlocale(LC_ALL, "en_US.utf8");
size_t ret = 0;
char *str = "z\u00df\u6c34\U0001F34C";
fprintf(stderr, "string: '%s'\n", str);
mbstate_t state = {};
char32_t c32;
size_t loop = 0;
while((ret = mbrtoc32(&c32, str, strlen(str), &state))) {
assert(ret != (size_t)-3);
if(ret == (size_t)-1)
break;
if(ret == (size_t)-2)
break;
fprintf(stderr, "Next UTF-32 char: 0x%x obtained from %zu bytes [", c32, ret);
for(size_t n = 0; n < ret; ++n) {
fprintf(stderr, " 0x%02x ", (uint8_t) str[n]);
}
fprintf(stderr, "]\n");
assert(ret == expected_results[loop].ret);
assert(c32 == expected_results[loop].c32);
for(size_t n = 0; n < ret; ++n) {
assert((uint8_t) str[n] == expected_results[loop].bytes[n]);
}
str += ret;
loop++;
}
}
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