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Added template for the utf.c file containing conversion routines. (CVS 1313)

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FossilOrigin-Name: 89b42c468f437003f74a1785370e75b2585fa9e2
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drh
2004-05-04 15:00:46 +00:00
parent 9102529d8c
commit a5d14fe7c5
3 changed files with 84 additions and 6 deletions
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/*
** 2004 April 13
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains routines used to translate between UTF-8,
** UTF-16, UTF-16BE, and UTF-16LE.
**
** $Id: utf.c,v 1.1 2004/05/04 15:00:47 drh Exp $
**
** Notes on UTF-8:
**
** Byte-0 Byte-1 Byte-2 Byte-3 Value
** 0xxxxxxx 00000000 00000000 0xxxxxxx
** 110yyyyy 10xxxxxx 00000000 00000yyy yyxxxxxx
** 1110zzzz 10yyyyyy 10xxxxxx 00000000 zzzzyyyy yyxxxxxx
** 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx 000uuuuu zzzzyyyy yyxxxxxx
**
**
** Notes on UTF-16: (with wwww+1==uuuuu)
**
** Word-0 Word-1 Value
** 110110wwwwxxxxxx 110111yyyyyyyyyy 000uuuuu xxxxxxyy yyyyyyyy
** xxxxxxxxyyyyyyyy 00000000 xxxxxxxx yyyyyyyy
**
** BOM or Byte Order Mark:
** 0xff 0xfe little-endian utf-16 follows
** 0xfe 0xff big-endian utf-16 follows
*/
/*
** Convert a string in UTF-16 native byte (or with a Byte-order-mark or
** "BOM") into a UTF-8 string. The UTF-8 string is written into space
** obtained from sqlit3Malloc() and must be released by the calling function.
**
** The parameter N is the number of bytes in the UTF-16 string. If N is
** negative, the entire string up to the first \u0000 character is translated.
**
** The returned UTF-8 string is always \000 terminated.
*/
unsigned char *sqlite3utf16to8(const void *pData, int N){
unsigned char *in = (unsigned char *)pData;
}
/*
** Convert a string in UTF-16 native byte or with a BOM into a UTF-16LE
** string. The conversion occurs in-place. The output overwrites the
** input. N bytes are converted. If N is negative everything is converted
** up to the first \u0000 character.
**
** If the native byte order is little-endian and there is no BOM, then
** this routine is a no-op. If there is a BOM at the start of the string,
** it is removed.
*/
void sqlite3utf16to16le(void *pData, int N){
}
void sqlite3utf16to16be(void *pData, int N){
}
/*
** Translation from UTF-16LE to UTF-16BE and back again is accomplished
** using the library function swab().
*/
/*
** Translate UTF-8 to UTF-16BE or UTF-16LE
*/
void *sqlite3utf8to16be(const unsigned char *pIn, int N){
}
void *sqlite3utf8to16le(const unsigned char *pIn, int N){
}