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libfreerdp-core/unicode: implement utf8/utf-16 conversion.

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This commit is contained in:
Vic Lee 2011-08-08 14:10:50 +08:00
parent 42c17867b6
commit f104b0ca92
1 changed files with 82 additions and 20 deletions
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102
libfreerdp-utils/unicode.c
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@ -28,8 +28,8 @@ char* freerdp_uniconv_in(UNICONV *uniconv, unsigned char* pin, size_t in_len)
{
unsigned char *conv_pin = pin;
size_t conv_in_len = in_len;
char *pout = xmalloc(in_len + 1), *conv_pout = pout;
size_t conv_out_len = in_len;
char *pout = xmalloc(in_len * 2 + 1), *conv_pout = pout;
size_t conv_out_len = in_len * 2;
#ifdef HAVE_ICONV
if (iconv(uniconv->in_iconv_h, (ICONV_CONST char **) &conv_pin, &conv_in_len, &conv_pout, &conv_out_len) == (size_t) - 1)
@ -41,18 +41,47 @@ char* freerdp_uniconv_in(UNICONV *uniconv, unsigned char* pin, size_t in_len)
#else
while (conv_in_len >= 2)
{
if ((signed char)(*conv_pin) < 0)
{
printf("freerdp_uniconv_in: wrong input conversion of char %d\n", *conv_pin);
}
*conv_pout++ = *conv_pin++;
if ((*conv_pin) != 0)
{
printf("freerdp_uniconv_in: wrong input conversion skipping non-zero char %d\n", *conv_pin);
}
conv_pin++;
unsigned int wc;
wc = (unsigned int)(unsigned char)(*conv_pin++);
wc += ((unsigned int)(unsigned char)(*conv_pin++)) << 8;
conv_in_len -= 2;
conv_out_len--;
if (wc >= 0xD800 && wc <= 0xDFFF && conv_in_len >= 2)
{
/* Code points U+10000 to U+10FFFF using surrogate pair */
wc = ((wc - 0xD800) << 10) + 0x10000;
wc += (unsigned int)(unsigned char)(*conv_pin++);
wc += ((unsigned int)(unsigned char)(*conv_pin++) - 0xDC) << 8;
conv_in_len -= 2;
}
if (wc <= 0x7F)
{
*conv_pout++ = (char)wc;
conv_out_len--;
}
else if (wc <= 0x07FF)
{
*conv_pout++ = (char)(0xC0 + (wc >> 6));
*conv_pout++ = (char)(0x80 + (wc & 0x3F));
conv_out_len -= 2;
}
else if (wc <= 0xFFFF)
{
*conv_pout++ = (char)(0xE0 + (wc >> 12));
*conv_pout++ = (char)(0x80 + ((wc >> 6) & 0x3F));
*conv_pout++ = (char)(0x80 + (wc & 0x3F));
conv_out_len -= 3;
}
else
{
*conv_pout++ = (char)(0xF0 + (wc >> 18));
*conv_pout++ = (char)(0x80 + ((wc >> 12) & 0x3F));
*conv_pout++ = (char)(0x80 + ((wc >> 6) & 0x3F));
*conv_pout++ = (char)(0x80 + (wc & 0x3F));
conv_out_len -= 4;
}
}
#endif
@ -97,14 +126,47 @@ char* freerdp_uniconv_out(UNICONV *uniconv, char *str, size_t *pout_len)
#else
while ((ibl > 0) && (obl > 0))
{
if ((signed char)(*pin) < 0)
{
return NULL;
}
*pout++ = *pin++;
*pout++ = 0;
unsigned int wc;
wc = (unsigned int)(unsigned char)(*pin++);
ibl--;
obl -= 2;
if (wc >= 0xF0)
{
wc = (wc - 0xF0) << 18;
wc += ((unsigned int)(unsigned char)(*pin++) - 0x80) << 12;
wc += ((unsigned int)(unsigned char)(*pin++) - 0x80) << 6;
wc += ((unsigned int)(unsigned char)(*pin++) - 0x80);
ibl -= 3;
}
else if (wc >= 0xE0)
{
wc = (wc - 0xE0) << 12;
wc += ((unsigned int)(unsigned char)(*pin++) - 0x80) << 6;
wc += ((unsigned int)(unsigned char)(*pin++) - 0x80);
ibl -= 2;
}
else if (wc >= 0xC0)
{
wc = (wc - 0xC0) << 6;
wc += ((unsigned int)(unsigned char)(*pin++) - 0x80);
ibl -= 1;
}
if (wc <= 0xFFFF)
{
*pout++ = (char)(wc & 0xFF);
*pout++ = (char)(wc >> 8);
obl -= 2;
}
else
{
wc -= 0x10000;
*pout++ = (char)((wc >> 10) & 0xFF);
*pout++ = (char)((wc >> 18) + 0xD8);
*pout++ = (char)(wc & 0xFF);
*pout++ = (char)(((wc >> 8) & 0x03) + 0xDC);
obl -= 4;
}
}
#endif