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Work on multi-out terminal

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2009-12-24 00:37:11 +01:00
parent a2c1332b70
commit f4c623e170
21 changed files with 707 additions and 570 deletions
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64
lib/charset.c
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@ -114,3 +114,67 @@ grub_utf8_to_utf16 (grub_uint16_t *dest, grub_size_t destsize,
*srcend = src;
return p - dest;
}
/* Convert UCS-4 to UTF-8. */
char *
grub_ucs4_to_utf8_alloc (grub_uint32_t *src, grub_size_t size)
{
grub_size_t remaining;
grub_uint32_t *ptr;
grub_size_t cnt = 0;
grub_uint8_t *ret, *dest;
remaining = size;
ptr = src;
while (remaining--)
{
grub_uint32_t code = *ptr++;
if (code <= 0x007F)
cnt++;
else if (code <= 0x07FF)
cnt += 2;
else if ((code >= 0xDC00 && code <= 0xDFFF)
|| (code >= 0xD800 && code <= 0xDBFF))
/* No surrogates in UCS-4... */
cnt++;
else
cnt += 3;
}
cnt++;
ret = grub_malloc (cnt);
if (!ret)
return 0;
dest = ret;
remaining = size;
ptr = src;
while (remaining--)
{
grub_uint32_t code = *ptr++;
if (code <= 0x007F)
*dest++ = code;
else if (code <= 0x07FF)
{
*dest++ = (code >> 6) | 0xC0;
*dest++ = (code & 0x3F) | 0x80;
}
else if ((code >= 0xDC00 && code <= 0xDFFF)
|| (code >= 0xD800 && code <= 0xDBFF))
{
/* No surrogates in UCS-4... */
*dest++ = '?';
}
else
{
*dest++ = (code >> 12) | 0xE0;
*dest++ = ((code >> 6) & 0x3F) | 0x80;
*dest++ = (code & 0x3F) | 0x80;
}
}
*dest = 0;
return ret;
}