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Fixes: 

The comparison routines for text and char data type give incorrect results
if the input data contains characters greater than 127.  As these routines
perform the comparison using signed char variables all character codes
greater than 127 are interpreted as less than 0.  These codes are used to
encode the iso8859 char sets.
The other text-like data types seem to work as expected as they use unsigned
chars in comparisons.


Submitted by: Massimo Dal Zotto <dz@cs.unitn.it>
This commit is contained in:
Marc G. Fournier 1996-09-10 06:41:38 +00:00
parent 1ba34d91fc
commit f2f53aee0f
2 changed files with 15 additions and 2 deletions
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9
src/backend/utils/adt/char.c
View File

@ -12,7 +12,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.1.1.1 1996/07/09 06:22:03 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.2 1996/09/10 06:41:34 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -129,10 +129,17 @@ char *char16out(char *s)
int32 chareq(int8 arg1, int8 arg2) { return(arg1 == arg2); }
int32 charne(int8 arg1, int8 arg2) { return(arg1 != arg2); }
#ifdef UNSIGNED_CHAR_TEXT
int32 charlt(int8 arg1, int8 arg2) { return((uint8)arg1 < (uint8)arg2); }
int32 charle(int8 arg1, int8 arg2) { return((uint8)arg1 <= (uint8)arg2); }
int32 chargt(int8 arg1, int8 arg2) { return((uint8)arg1 > (uint8)arg2); }
int32 charge(int8 arg1, int8 arg2) { return((uint8)arg1 >= (uint8)arg2); }
#else
int32 charlt(int8 arg1, int8 arg2) { return(arg1 < arg2); }
int32 charle(int8 arg1, int8 arg2) { return(arg1 <= arg2); }
int32 chargt(int8 arg1, int8 arg2) { return(arg1 > arg2); }
int32 charge(int8 arg1, int8 arg2) { return(arg1 >= arg2); }
#endif
int8 charpl(int8 arg1, int8 arg2) { return(arg1 + arg2); }
int8 charmi(int8 arg1, int8 arg2) { return(arg1 - arg2); }
int8 charmul(int8 arg1, int8 arg2) { return(arg1 * arg2); }

8
src/backend/utils/adt/varlena.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.4 1996/07/22 21:56:04 scrappy Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varlena.c,v 1.5 1996/09/10 06:41:38 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
@ -290,6 +290,9 @@ int32
text_lt(struct varlena *arg1, struct varlena *arg2)
{
int len;
#ifdef UNSIGNED_CHAR_TEXT
unsigned
#endif
char *a1p, *a2p;
if (arg1 == NULL || arg2 == NULL)
@ -318,6 +321,9 @@ int32
text_le(struct varlena *arg1, struct varlena *arg2)
{
int len;
#ifdef UNSIGNED_CHAR_TEXT
unsigned
#endif
char *a1p, *a2p;
if (arg1 == NULL || arg2 == NULL)