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int utf8_to_unicode(uint8_t *in, uint16_t **out, int *outsize)
{
uint8_t *p = in;
uint16_t *result = NULL;
int resultsize = 0;
uint8_t *tmp = NULL;
result = (uint16_t *)malloc(strlen((char *)in) * 2 + 2); /* should be enough */
memset(result, 0, strlen((char*)in) * 2 + 2);
tmp = (uint8_t *)result;
while (*p)
{
if (*p >= 0x00 && *p <= 0x7f)
{
*tmp = *p;
tmp++;
*tmp = '\0';
resultsize += 1;
}
else if ((*p & (0xff << 5)) == 0xc0)
{
uint8_t t1 = 0;
uint8_t t2 = 0;
t1 = *p & (0xff >> 3);
p++;
t2 = *p & (0xff >> 2);
*tmp = t2 | ((t1 & (0xff >> 6)) << 6);//t1 >> 2;
tmp++;
*tmp = t1 >> 2;//t2 | ((t1 & (0xff >> 6)) << 6);
tmp++;
resultsize += 1;
}
else if ((*p & (0xff << 4)) == 0xe0)
{
uint8_t t1 = 0;
uint8_t t2 = 0;
uint8_t t3 = 0;
t1 = *p & (0xff >> 3);
p++;
t2 = *p & (0xff >> 2);
p++;
t3 = *p & (0xff >> 2);
//Little Endian
*tmp = ((t2 & (0xff >> 6)) << 6) | t3;//(t1 << 4) | (t2 >> 2);
tmp++;
*tmp = (t1 << 4) | (t2 >> 2);//((t2 & (0xff >> 6)) << 6) | t3;
tmp++;
resultsize += 1;
}
p++;
}
return resultsize;
}
int unicode_to_utf8(uint16_t *in, int insize, uint8_t **out)
{
int i = 0;
int outsize = 0;
int charscount = 0;
uint8_t *result = NULL;
uint8_t *tmp = NULL;
charscount = insize / sizeof(uint16_t);
result = (uint8_t *)malloc(charscount * 3 + 1);
memset(result, 0, charscount * 3 + 1);
tmp = result;
for (i = 0; i < charscount; i++)
{
uint16_t unicode = in[i];
if (unicode >= 0x0000 && unicode <= 0x007f)
{
*tmp = (uint8_t)unicode;
tmp += 1;
outsize += 1;
}
else if (unicode >= 0x0080 && unicode <= 0x07ff)
{
*tmp = 0xc0 | (unicode >> 6);
tmp += 1;
*tmp = 0x80 | (unicode & (0xff >> 2));
tmp += 1;
outsize += 2;
}
else if (unicode >= 0x0800 && unicode <= 0xffff)
{
*tmp = 0xe0 | (unicode >> 12);
tmp += 1;
*tmp = 0x80 | (unicode >> 6 & 0x00ff);
tmp += 1;
*tmp = 0x80 | (unicode & (0xff >> 2));
tmp += 1;
outsize += 3;
}
}
*tmp = '\0';
*out = result;
return outsize;
}