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Add comment on C locale test for upper/lower/initcap().

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This commit is contained in:
Bruce Momjian 2005-05-07 15:18:17 +00:00
parent d733f110cd
commit 3adba41a3c
1 changed files with 16 additions and 4 deletions
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20
src/backend/utils/adt/oracle_compat.c
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@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/oracle_compat.c,v 1.59 2005/03/16 01:49:10 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/oracle_compat.c,v 1.60 2005/05/07 15:18:17 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -167,7 +167,11 @@ Datum
lower(PG_FUNCTION_ARGS)
{
#ifdef USE_WIDE_UPPER_LOWER
/* use wide char code only when max encoding length > 1 and ctype != C */
/*
* Use wide char code only when max encoding length > 1 and ctype != C.
* Some operating systems fail with multi-byte encodings and a C locale.
* Also, for a C locale there is no need to process as multibyte.
*/
if (pg_database_encoding_max_length() > 1 && !lc_ctype_is_c())
{
text *string = PG_GETARG_TEXT_P(0);
@ -229,7 +233,11 @@ Datum
upper(PG_FUNCTION_ARGS)
{
#ifdef USE_WIDE_UPPER_LOWER
/* use wide char code only when max encoding length > 1 and ctype != C */
/*
* Use wide char code only when max encoding length > 1 and ctype != C.
* Some operating systems fail with multi-byte encodings and a C locale.
* Also, for a C locale there is no need to process as multibyte.
*/
if (pg_database_encoding_max_length() > 1 && !lc_ctype_is_c())
{
text *string = PG_GETARG_TEXT_P(0);
@ -294,7 +302,11 @@ Datum
initcap(PG_FUNCTION_ARGS)
{
#ifdef USE_WIDE_UPPER_LOWER
/* use wide char code only when max encoding length > 1 and ctype != C */
/*
* Use wide char code only when max encoding length > 1 and ctype != C.
* Some operating systems fail with multi-byte encodings and a C locale.
* Also, for a C locale there is no need to process as multibyte.
*/
if (pg_database_encoding_max_length() > 1 && !lc_ctype_is_c())
{
text *string = PG_GETARG_TEXT_P(0);