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Dept of second thoughts: don't use the new wide-character upper/lower

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code if we are running in a single-byte encoding.  No point in the
extra overhead in that case.
This commit is contained in:
Tom Lane 2004-06-06 22:17:01 +00:00
parent b8312c5fe7
commit 7845bfc095
1 changed files with 118 additions and 112 deletions
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230
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 1.52 2004/05/26 16:16:03 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/oracle_compat.c,v 1.53 2004/06/06 22:17:01 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -166,40 +166,44 @@ Datum
lower(PG_FUNCTION_ARGS)
{
#ifdef USE_WIDE_UPPER_LOWER
text *string = PG_GETARG_TEXT_P(0);
text *result;
wchar_t *workspace;
int i;
workspace = texttowcs(string);
for (i = 0; workspace[i] != 0; i++)
workspace[i] = towlower(workspace[i]);
result = wcstotext(workspace, i);
pfree(workspace);
PG_RETURN_TEXT_P(result);
#else /* !USE_WIDE_UPPER_LOWER */
text *string = PG_GETARG_TEXT_P_COPY(0);
char *ptr;
int m;
/* Since we copied the string, we can scribble directly on the value */
ptr = VARDATA(string);
m = VARSIZE(string) - VARHDRSZ;
while (m-- > 0)
/* use wide char code only when max encoding length > one */
if (pg_database_encoding_max_length() > 1)
{
*ptr = tolower((unsigned char) *ptr);
ptr++;
}
text *string = PG_GETARG_TEXT_P(0);
text *result;
wchar_t *workspace;
int i;
PG_RETURN_TEXT_P(string);
workspace = texttowcs(string);
for (i = 0; workspace[i] != 0; i++)
workspace[i] = towlower(workspace[i]);
result = wcstotext(workspace, i);
pfree(workspace);
PG_RETURN_TEXT_P(result);
}
else
#endif /* USE_WIDE_UPPER_LOWER */
{
text *string = PG_GETARG_TEXT_P_COPY(0);
char *ptr;
int m;
/* Since we copied the string, we can scribble directly on the value */
ptr = VARDATA(string);
m = VARSIZE(string) - VARHDRSZ;
while (m-- > 0)
{
*ptr = tolower((unsigned char) *ptr);
ptr++;
}
PG_RETURN_TEXT_P(string);
}
}
@ -221,40 +225,44 @@ Datum
upper(PG_FUNCTION_ARGS)
{
#ifdef USE_WIDE_UPPER_LOWER
text *string = PG_GETARG_TEXT_P(0);
text *result;
wchar_t *workspace;
int i;
workspace = texttowcs(string);
for (i = 0; workspace[i] != 0; i++)
workspace[i] = towupper(workspace[i]);
result = wcstotext(workspace, i);
pfree(workspace);
PG_RETURN_TEXT_P(result);
#else /* !USE_WIDE_UPPER_LOWER */
text *string = PG_GETARG_TEXT_P_COPY(0);
char *ptr;
int m;
/* Since we copied the string, we can scribble directly on the value */
ptr = VARDATA(string);
m = VARSIZE(string) - VARHDRSZ;
while (m-- > 0)
/* use wide char code only when max encoding length > one */
if (pg_database_encoding_max_length() > 1)
{
*ptr = toupper((unsigned char) *ptr);
ptr++;
}
text *string = PG_GETARG_TEXT_P(0);
text *result;
wchar_t *workspace;
int i;
PG_RETURN_TEXT_P(string);
workspace = texttowcs(string);
for (i = 0; workspace[i] != 0; i++)
workspace[i] = towupper(workspace[i]);
result = wcstotext(workspace, i);
pfree(workspace);
PG_RETURN_TEXT_P(result);
}
else
#endif /* USE_WIDE_UPPER_LOWER */
{
text *string = PG_GETARG_TEXT_P_COPY(0);
char *ptr;
int m;
/* Since we copied the string, we can scribble directly on the value */
ptr = VARDATA(string);
m = VARSIZE(string) - VARHDRSZ;
while (m-- > 0)
{
*ptr = toupper((unsigned char) *ptr);
ptr++;
}
PG_RETURN_TEXT_P(string);
}
}
@ -279,58 +287,56 @@ Datum
initcap(PG_FUNCTION_ARGS)
{
#ifdef USE_WIDE_UPPER_LOWER
text *string = PG_GETARG_TEXT_P(0);
text *result;
wchar_t *workspace;
int wasalnum = 0;
int i;
workspace = texttowcs(string);
for (i = 0; workspace[i] != 0; i++)
/* use wide char code only when max encoding length > one */
if (pg_database_encoding_max_length() > 1)
{
if (wasalnum)
workspace[i] = towlower(workspace[i]);
else
workspace[i] = towupper(workspace[i]);
wasalnum = iswalnum(workspace[i]);
text *string = PG_GETARG_TEXT_P(0);
text *result;
wchar_t *workspace;
int wasalnum = 0;
int i;
workspace = texttowcs(string);
for (i = 0; workspace[i] != 0; i++)
{
if (wasalnum)
workspace[i] = towlower(workspace[i]);
else
workspace[i] = towupper(workspace[i]);
wasalnum = iswalnum(workspace[i]);
}
result = wcstotext(workspace, i);
pfree(workspace);
PG_RETURN_TEXT_P(result);
}
result = wcstotext(workspace, i);
pfree(workspace);
PG_RETURN_TEXT_P(result);
#else /* !USE_WIDE_UPPER_LOWER */
text *string = PG_GETARG_TEXT_P_COPY(0);
char *ptr;
int m;
/* Since we copied the string, we can scribble directly on the value */
ptr = VARDATA(string);
m = VARSIZE(string) - VARHDRSZ;
if (m > 0)
{
*ptr = toupper((unsigned char) *ptr);
ptr++;
m--;
}
while (m-- > 0)
{
/* Oracle capitalizes after all non-alphanumeric */
if (!isalnum((unsigned char) ptr[-1]))
*ptr = toupper((unsigned char) *ptr);
else
*ptr = tolower((unsigned char) *ptr);
ptr++;
}
PG_RETURN_TEXT_P(string);
else
#endif /* USE_WIDE_UPPER_LOWER */
{
text *string = PG_GETARG_TEXT_P_COPY(0);
int wasalnum = 0;
char *ptr;
int m;
/* Since we copied the string, we can scribble directly on the value */
ptr = VARDATA(string);
m = VARSIZE(string) - VARHDRSZ;
while (m-- > 0)
{
if (wasalnum)
*ptr = tolower((unsigned char) *ptr);
else
*ptr = toupper((unsigned char) *ptr);
wasalnum = isalnum((unsigned char) *ptr);
ptr++;
}
PG_RETURN_TEXT_P(string);
}
}