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Allocate enough memory for the worst-case UTF-16 to UTF-8 conversion.

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Ticket #1773. (CVS 3174)

FossilOrigin-Name: 2a0120c0f06d17185ede773729d97c93f90923ff
This commit is contained in:
drh
2006-04-16 12:05:03 +00:00
parent 18e87cff0a
commit a49b8611b9
3 changed files with 11 additions and 11 deletions
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8
src/utf.c
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@@ -12,7 +12,7 @@
** 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 $
** $Id: utf.c,v 1.39 2006/04/16 12:05:03 drh Exp $
**
** Notes on UTF-8:
**
@@ -287,11 +287,11 @@ int sqlite3VdbeMemTranslate(Mem *pMem, u8 desiredEnc){
/* 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
** 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) * 3 + 1;
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