mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-11-24 14:30:13 +01:00
650 lines
14 KiB
C
650 lines
14 KiB
C
#include "utf.h"
|
|
|
|
#include "ByteReader.h"
|
|
#include "ByteWriter.h"
|
|
#include "foundation/error.h"
|
|
#include <string.h>
|
|
|
|
static const uint8_t mask_tab[6]={0x80,0xE0,0xF0,0xF8,0xFC,0xFE};
|
|
|
|
static const uint8_t val_tab[6]={0,0xC0,0xE0,0xF0,0xF8,0xFC};
|
|
|
|
// returns the number of utf-16 words required to store a given codepoint
|
|
static size_t ucs4_to_utf16_count(uint32_t codepoint)
|
|
{
|
|
if (codepoint >= 0x110000)
|
|
return 0; // out of bounds
|
|
|
|
if (codepoint >= 0x10000)
|
|
return 2;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int utf16LE_to_ucs4_character(bytereader_t const byte_reader, uint32_t *codepoint)
|
|
{
|
|
uint16_t lead;
|
|
|
|
lead = bytereader_read_u16_le(byte_reader);
|
|
if (lead < 0xD800 || lead >= 0xE000)
|
|
{
|
|
*codepoint = lead;
|
|
return NErr_Success;
|
|
}
|
|
|
|
if (lead < 0xDC00)
|
|
{
|
|
if (bytereader_size(byte_reader) >= 2)
|
|
{
|
|
uint16_t trail = bytereader_read_u16_le(byte_reader);
|
|
if (trail >= 0xDC00 && trail < 0xE000)
|
|
{
|
|
*codepoint = 0x10000 + ((lead - 0xD800) << 10) + (trail - 0xDC00);
|
|
return NErr_Success;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NErr_Error; // invalid
|
|
}
|
|
|
|
static int utf16BE_to_ucs4_character(bytereader_t const byte_reader, uint32_t *codepoint)
|
|
{
|
|
uint16_t lead;
|
|
|
|
lead = bytereader_read_u16_be(byte_reader);
|
|
if (lead < 0xD800 || lead >= 0xE000)
|
|
{
|
|
*codepoint = lead;
|
|
return NErr_Success;
|
|
}
|
|
|
|
if (lead < 0xDC00)
|
|
{
|
|
if (bytereader_size(byte_reader) >= 2)
|
|
{
|
|
uint16_t trail = bytereader_read_u16_be(byte_reader);
|
|
if (trail >= 0xDC00 && trail < 0xE000)
|
|
{
|
|
*codepoint = 0x10000 + ((lead - 0xD800) << 10) + (trail - 0xDC00);
|
|
return NErr_Success;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NErr_Error; // invalid
|
|
}
|
|
|
|
static size_t utf8_to_ucs4_character(const char *utf8, size_t len, uint32_t *codepoint)
|
|
{
|
|
uint32_t res=0;
|
|
size_t n;
|
|
size_t cnt=0;
|
|
while(1)
|
|
{
|
|
if ((*utf8&mask_tab[cnt])==val_tab[cnt]) break;
|
|
if (++cnt==6) return 0;
|
|
}
|
|
cnt++;
|
|
|
|
|
|
if (cnt==2 && !(*utf8&0x1E))
|
|
return 0;
|
|
|
|
if (cnt==1)
|
|
res=*utf8;
|
|
else
|
|
res=(0xFF>>(cnt+1))&*utf8;
|
|
|
|
if (cnt > len)
|
|
return 0;
|
|
|
|
for (n=1;n<cnt;n++)
|
|
{
|
|
if ((utf8[n]&0xC0) != 0x80)
|
|
return 0;
|
|
if (!res && n==2 && !((utf8[n]&0x7F) >> (7 - cnt)))
|
|
return 0;
|
|
|
|
res=(res<<6)|(utf8[n]&0x3F);
|
|
}
|
|
|
|
if (codepoint)
|
|
*codepoint=res;
|
|
|
|
return cnt;
|
|
}
|
|
|
|
// returns the number of utf-8 bytes required to store a given codepoint
|
|
static size_t ucs4_to_utf8_count(uint32_t codepoint)
|
|
{
|
|
if (codepoint < 0x80)
|
|
return 1;
|
|
else if (codepoint < 0x800)
|
|
return 2;
|
|
else if (codepoint < 0x10000)
|
|
return 3;
|
|
else if (codepoint < 0x200000)
|
|
return 4;
|
|
else if (codepoint < 0x4000000)
|
|
return 5;
|
|
else if (codepoint <= 0x7FFFFFFF)
|
|
return 6;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static size_t ucs4_to_utf8_character(char *target, uint32_t codepoint, size_t max)
|
|
{
|
|
size_t count = ucs4_to_utf8_count(codepoint);
|
|
|
|
if (!count)
|
|
return 0;
|
|
|
|
if (count>max) return 0;
|
|
|
|
if (target == 0)
|
|
return count;
|
|
|
|
switch (count)
|
|
{
|
|
case 6:
|
|
target[5] = 0x80 | (codepoint & 0x3F);
|
|
codepoint = codepoint >> 6;
|
|
codepoint |= 0x4000000;
|
|
case 5:
|
|
target[4] = 0x80 | (codepoint & 0x3F);
|
|
codepoint = codepoint >> 6;
|
|
codepoint |= 0x200000;
|
|
case 4:
|
|
target[3] = 0x80 | (codepoint & 0x3F);
|
|
codepoint = codepoint >> 6;
|
|
codepoint |= 0x10000;
|
|
case 3:
|
|
target[2] = 0x80 | (codepoint & 0x3F);
|
|
codepoint = codepoint >> 6;
|
|
codepoint |= 0x800;
|
|
case 2:
|
|
target[1] = 0x80 | (codepoint & 0x3F);
|
|
codepoint = codepoint >> 6;
|
|
codepoint |= 0xC0;
|
|
case 1:
|
|
target[0] = codepoint;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static size_t ucs4_to_utf16LE_character(bytewriter_t byte_writer, uint32_t codepoint)
|
|
{
|
|
if (codepoint >= 0x110000)
|
|
return 0;
|
|
|
|
if (codepoint >= 0x10000)
|
|
{
|
|
if (bytewriter_size(byte_writer) < 4)
|
|
return 0;
|
|
|
|
bytewriter_write_u16_le(byte_writer, ((codepoint - 0x10000) >> 10) + 0xD800); // high surrogate
|
|
bytewriter_write_u16_le(byte_writer, ((codepoint - 0x10000) & 0x3FF) + 0xDC00); // low surrogate
|
|
return 2;
|
|
}
|
|
else
|
|
{
|
|
bytewriter_write_u16_le(byte_writer, codepoint);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
static size_t ucs4_to_utf16BE_character(bytewriter_t byte_writer, uint32_t codepoint)
|
|
{
|
|
if (codepoint >= 0x110000)
|
|
return 0;
|
|
|
|
if (codepoint >= 0x10000)
|
|
{
|
|
if (bytewriter_size(byte_writer) < 4)
|
|
return 0;
|
|
|
|
bytewriter_write_u16_be(byte_writer, ((codepoint - 0x10000) >> 10) + 0xD800); // high surrogate
|
|
bytewriter_write_u16_be(byte_writer, ((codepoint - 0x10000) & 0x3FF) + 0xDC00); // low surrogate
|
|
return 2;
|
|
}
|
|
else
|
|
{
|
|
bytewriter_write_u16_be(byte_writer, codepoint);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
size_t utf16LE_to_utf8(const uint16_t *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
bytereader_s byte_reader;
|
|
bytereader_init(&byte_reader, src, source_len*2);
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (bytereader_size(&byte_reader))
|
|
{
|
|
if (utf16LE_to_ucs4_character(&byte_reader, &codepoint) != NErr_Success)
|
|
break;
|
|
|
|
characters_processed = ucs4_to_utf8_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(bytereader_size(&byte_reader) && position<out_len)
|
|
{
|
|
if (utf16LE_to_ucs4_character(&byte_reader, &codepoint) != NErr_Success)
|
|
break;
|
|
|
|
characters_processed=ucs4_to_utf8_character(&dst[position], codepoint, out_len-position);
|
|
if (!characters_processed)
|
|
break;
|
|
position+=characters_processed;
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
size_t utf16BE_to_utf8(const uint16_t *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
bytereader_s byte_reader;
|
|
bytereader_init(&byte_reader, src, source_len*2);
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (bytereader_size(&byte_reader))
|
|
{
|
|
if (utf16BE_to_ucs4_character(&byte_reader, &codepoint) != NErr_Success)
|
|
break;
|
|
|
|
characters_processed = ucs4_to_utf8_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(bytereader_size(&byte_reader) && position<out_len)
|
|
{
|
|
if (utf16BE_to_ucs4_character(&byte_reader, &codepoint) != NErr_Success)
|
|
break;
|
|
|
|
characters_processed=ucs4_to_utf8_character(&dst[position], codepoint, out_len-position);
|
|
if (!characters_processed)
|
|
break;
|
|
position+=characters_processed;
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
|
|
size_t ucs4_to_utf8(const uint32_t *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
bytereader_s byte_reader;
|
|
bytereader_init(&byte_reader, src, source_len*4);
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (bytereader_size(&byte_reader) > 3)
|
|
{
|
|
codepoint = bytereader_read_u32_le(&byte_reader);
|
|
|
|
characters_processed = ucs4_to_utf8_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(bytereader_size(&byte_reader) > 3 && position<out_len)
|
|
{
|
|
codepoint = bytereader_read_u32_le(&byte_reader);
|
|
|
|
characters_processed=ucs4_to_utf8_character(&dst[position], codepoint, out_len-position);
|
|
if (!characters_processed)
|
|
break;
|
|
position+=characters_processed;
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
size_t utf8_to_utf16LE(const char *src, size_t source_len, uint16_t *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t characters_processed;
|
|
bytewriter_s byte_writer;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
size_t position=0;
|
|
while (source_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
characters_processed = ucs4_to_utf16_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
|
|
bytewriter_init(&byte_writer, dst, out_len*2);
|
|
while(source_len && bytewriter_size(&byte_writer))
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
characters_processed=ucs4_to_utf16LE_character(&byte_writer, codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
}
|
|
if (bytewriter_size(&byte_writer))
|
|
bytewriter_write_u16_le(&byte_writer, 0);
|
|
return out_len - bytewriter_size(&byte_writer)/2;
|
|
}
|
|
|
|
size_t utf8_to_utf16BE(const char *src, size_t source_len, uint16_t *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t characters_processed;
|
|
bytewriter_s byte_writer;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
size_t position=0;
|
|
while (source_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
characters_processed = ucs4_to_utf16_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
bytewriter_init(&byte_writer, dst, out_len*2);
|
|
while(source_len && bytewriter_size(&byte_writer))
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
characters_processed=ucs4_to_utf16BE_character(&byte_writer, codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
}
|
|
if (bytewriter_size(&byte_writer))
|
|
bytewriter_write_u16_be(&byte_writer, 0);
|
|
|
|
return out_len - bytewriter_size(&byte_writer)/2;
|
|
|
|
}
|
|
|
|
size_t utf8_to_ISO_8859_1(const char *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (source_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
position++;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(source_len && position<out_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
if (codepoint < 256)
|
|
dst[position++] = codepoint;
|
|
else
|
|
dst[position++] = '?';
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
size_t ISO_8859_1_to_utf8(const char *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (source_len)
|
|
{
|
|
codepoint = *src++;
|
|
source_len--;
|
|
|
|
characters_processed = ucs4_to_utf8_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(source_len && position<out_len)
|
|
{
|
|
codepoint = *src++;
|
|
|
|
source_len--;
|
|
|
|
characters_processed=ucs4_to_utf8_character(&dst[position], codepoint, out_len-position);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
size_t utf8_to_ucs4(const char *src, size_t source_len, uint32_t *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t characters_processed;
|
|
bytewriter_s byte_writer;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
size_t position=0;
|
|
while (source_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
characters_processed = 1;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
bytewriter_init(&byte_writer, dst, out_len*4);
|
|
while(source_len && bytewriter_size(&byte_writer))
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
bytewriter_write_u32_le(&byte_writer, codepoint);
|
|
}
|
|
if (bytewriter_size(&byte_writer))
|
|
bytewriter_write_u32_le(&byte_writer, 0);
|
|
return out_len - bytewriter_size(&byte_writer)/4;
|
|
}
|
|
|
|
size_t ASCII_to_utf8(const char *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (source_len)
|
|
{
|
|
codepoint = *src++;
|
|
source_len--;
|
|
|
|
characters_processed = ucs4_to_utf8_count(codepoint);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(source_len && position<out_len)
|
|
{
|
|
codepoint = *src++;
|
|
|
|
source_len--;
|
|
|
|
characters_processed=ucs4_to_utf8_character(&dst[position], codepoint, out_len-position);
|
|
if (!characters_processed)
|
|
break;
|
|
|
|
position+=characters_processed;
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
size_t utf8_to_ASCII(const char *src, size_t source_len, char *dst, size_t out_len)
|
|
{
|
|
uint32_t codepoint;
|
|
size_t position=0;
|
|
size_t characters_processed;
|
|
|
|
if (!dst) // they just want the size
|
|
{
|
|
while (source_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
position++;
|
|
}
|
|
return position;
|
|
}
|
|
|
|
while(source_len && position<out_len)
|
|
{
|
|
characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
|
|
if (codepoint < 128)
|
|
dst[position++] = codepoint;
|
|
else
|
|
dst[position++] = '?';
|
|
}
|
|
if (position<out_len)
|
|
dst[position]=0;
|
|
return position;
|
|
}
|
|
|
|
size_t utf8_strnlen(const char *src, size_t source_len, size_t codepoints)
|
|
{
|
|
uint32_t codepoint = 0;
|
|
size_t position=0;
|
|
size_t i=0;
|
|
|
|
for (i=0;i<codepoints && *src;i++)
|
|
{
|
|
size_t characters_processed = utf8_to_ucs4_character(src, source_len, &codepoint);
|
|
if (codepoint == 0xFFFD)
|
|
break;
|
|
|
|
source_len -= characters_processed;
|
|
src += characters_processed;
|
|
position+=characters_processed;
|
|
}
|
|
return position;
|
|
|
|
}
|