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Overview
| Comment: | Save a few bytes in utf.c. (CVS 1981) |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
8154d545e8ae3d22490b49ce4f327605 |
| User & Date: | drh 2004-09-24 23:20:52 |
Context
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2004-09-24
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| 23:59 | Size optimizations in vdbeapi.c. (CVS 1982) (check-in: b2f3d4bb user: drh tags: trunk) | |
| 23:20 | Save a few bytes in utf.c. (CVS 1981) (check-in: 8154d545 user: drh tags: trunk) | |
| 22:32 | Optimizations to vdbeaux.c and printf.c (CVS 1980) (check-in: eabc77c9 user: drh tags: trunk) | |
Changes
Changes to src/utf.c.
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** 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 1.28 2004/08/31 00:52:37 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 ................................................................................ if( pMem->enc==SQLITE_UTF8 ){ if( desiredEnc==SQLITE_UTF16LE ){ /* UTF-8 -> UTF-16 Little-endian */ while( zIn<zTerm ){ READ_UTF8(zIn, c); WRITE_UTF16LE(z, c); } WRITE_UTF16LE(z, 0); pMem->n = (z-zOut)-2; }else if( desiredEnc==SQLITE_UTF16BE ){ /* UTF-8 -> UTF-16 Big-endian */ while( zIn<zTerm ){ READ_UTF8(zIn, c); WRITE_UTF16BE(z, c); } WRITE_UTF16BE(z, 0); pMem->n = (z-zOut)-2; } }else{ assert( desiredEnc==SQLITE_UTF8 ); if( pMem->enc==SQLITE_UTF16LE ){ /* UTF-16 Little-endian -> UTF-8 */ while( zIn<zTerm ){ READ_UTF16LE(zIn, c); WRITE_UTF8(z, c); } WRITE_UTF8(z, 0); pMem->n = (z-zOut)-1; }else{ /* UTF-16 Little-endian -> UTF-8 */ while( zIn<zTerm ){ READ_UTF16BE(zIn, c); WRITE_UTF8(z, c); } WRITE_UTF8(z, 0); pMem->n = (z-zOut)-1; } } assert( (pMem->n+(desiredEnc==SQLITE_UTF8?1:2))<=len ); sqlite3VdbeMemRelease(pMem); pMem->flags &= ~(MEM_Static|MEM_Dyn|MEM_Ephem|MEM_Short); pMem->enc = desiredEnc; if( zOut==zShort ){ memcpy(pMem->zShort, zOut, len); |
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** 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 1.29 2004/09/24 23:20:52 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 ................................................................................ if( pMem->enc==SQLITE_UTF8 ){ if( desiredEnc==SQLITE_UTF16LE ){ /* UTF-8 -> UTF-16 Little-endian */ while( zIn<zTerm ){ READ_UTF8(zIn, c); WRITE_UTF16LE(z, c); } }else{ assert( desiredEnc==SQLITE_UTF16BE ); /* UTF-8 -> UTF-16 Big-endian */ while( zIn<zTerm ){ READ_UTF8(zIn, c); WRITE_UTF16BE(z, c); } } pMem->n = z - zOut; *z++ = 0; }else{ assert( desiredEnc==SQLITE_UTF8 ); if( pMem->enc==SQLITE_UTF16LE ){ /* UTF-16 Little-endian -> UTF-8 */ while( zIn<zTerm ){ READ_UTF16LE(zIn, c); WRITE_UTF8(z, c); } }else{ /* UTF-16 Little-endian -> UTF-8 */ while( zIn<zTerm ){ READ_UTF16BE(zIn, c); WRITE_UTF8(z, c); } } pMem->n = z - zOut; } *z = 0; assert( (pMem->n+(desiredEnc==SQLITE_UTF8?1:2))<=len ); sqlite3VdbeMemRelease(pMem); pMem->flags &= ~(MEM_Static|MEM_Dyn|MEM_Ephem|MEM_Short); pMem->enc = desiredEnc; if( zOut==zShort ){ memcpy(pMem->zShort, zOut, len); |