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Overview
| Comment: | Allocate enough memory for the worst-case UTF-16 to UTF-8 conversion. Ticket #1773. (CVS 3174) |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: | 2a0120c0f06d17185ede773729d97c93f90923ff |
| User & Date: | drh 2006-04-16 12:05:03 |
Context
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2006-04-19
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| 01:24 | Remove a superfluous call to access() in the unix driver. Error spotted by Coverity. (CVS 3175) check-in: 4f195aa1 user: drh tags: trunk | |
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2006-04-16
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| 12:05 | Allocate enough memory for the worst-case UTF-16 to UTF-8 conversion. Ticket #1773. (CVS 3174) check-in: 2a0120c0 user: drh tags: trunk | |
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2006-04-11
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| 14:16 | Allow constant terms in the ORDER BY or GROUP BY clauses. Ticket #1768. (CVS 3173) check-in: d83e0230 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 1.38 2006/02/24 02:53:50 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 ................................................................................ pMem->enc = desiredEnc; goto translate_out; } /* Set len to the maximum number of bytes required in the output buffer. */ if( desiredEnc==SQLITE_UTF8 ){ /* When converting from UTF-16, the maximum growth results from ** translating a 2-byte character to a 3-byte UTF-8 character (i.e. ** code-point 0xFFFC). A single byte is required for the output string ** nul-terminator. */ len = (pMem->n/2) * 3 + 1; }else{ /* When converting from UTF-8 to UTF-16 the maximum growth is caused ** when a 1-byte UTF-8 character is translated into a 2-byte UTF-16 ** character. Two bytes are required in the output buffer for the ** nul-terminator. */ len = pMem->n * 2 + 2; |
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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 1.39 2006/04/16 12:05:03 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 ................................................................................ pMem->enc = desiredEnc; goto translate_out; } /* Set len to the maximum number of bytes required in the output buffer. */ if( desiredEnc==SQLITE_UTF8 ){ /* When converting from UTF-16, the maximum growth results from ** translating a 2-byte character to a 4-byte UTF-8 character. ** A single byte is required for the output string ** nul-terminator. */ len = pMem->n * 2 + 1; }else{ /* When converting from UTF-8 to UTF-16 the maximum growth is caused ** when a 1-byte UTF-8 character is translated into a 2-byte UTF-16 ** character. Two bytes are required in the output buffer for the ** nul-terminator. */ len = pMem->n * 2 + 2; |