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Clean up code to remove the explicit backslash cruft.

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If the backslash default is still wanted, just pass a backslash
 to MatchText() for the two-parameter callable routines.
This commit is contained in:
Thomas G. Lockhart 2000-08-07 01:45:00 +00:00
parent 371a485dba
commit 12e1c9efad
1 changed files with 79 additions and 98 deletions
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49
src/backend/utils/adt/like.c
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@ -11,12 +11,12 @@
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/like.c,v 1.38 2000/08/06 18:05:41 thomas Exp $ * $Header: /cvsroot/pgsql/src/backend/utils/adt/like.c,v 1.39 2000/08/07 01:45:00 thomas Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
#include "postgres.h" #include "postgres.h"
#include <ctype.h>
#include "mb/pg_wchar.h" #include "mb/pg_wchar.h"
#include "utils/builtins.h" #include "utils/builtins.h"
@ -307,22 +307,8 @@ MatchText(pg_wchar * t, int tlen, pg_wchar * p, int plen, char *e)
if ((plen <= 0) || (*t != *p)) if ((plen <= 0) || (*t != *p))
return LIKE_FALSE; return LIKE_FALSE;
} }
else else if (*p == '%')
{ {
switch (*p)
{
case '\\':
/* Literal match with following character. */
NextChar(p, plen);
/* FALLTHROUGH */
default:
if (*t != *p)
return LIKE_FALSE;
break;
case '_':
/* Match any single character. */
break;
case '%':
/* %% is the same as % according to the SQL standard */ /* %% is the same as % according to the SQL standard */
/* Advance past all %'s */ /* Advance past all %'s */
while ((plen > 0) && (*p == '%')) while ((plen > 0) && (*p == '%'))
@ -342,7 +328,7 @@ MatchText(pg_wchar * t, int tlen, pg_wchar * p, int plen, char *e)
* recurse unless first pattern char might match this * recurse unless first pattern char might match this
* text char. * text char.
*/ */
if ((*t == *p) || (*p == '\\') || (*p == '_') if ((*t == *p) || (*p == '_')
|| ((e != NULL) && (*p == *e))) || ((e != NULL) && (*p == *e)))
{ {
int matched = MatchText(t, tlen, p, plen, e); int matched = MatchText(t, tlen, p, plen, e);
@ -360,6 +346,12 @@ MatchText(pg_wchar * t, int tlen, pg_wchar * p, int plen, char *e)
*/ */
return LIKE_ABORT; return LIKE_ABORT;
} }
else if ((*p != '_') && (*t != *p))
{
/* Not the single-character wildcard and no explicit match?
* Then time to quit...
*/
return LIKE_FALSE;
} }
NextChar(t, tlen); NextChar(t, tlen);
@ -404,22 +396,8 @@ MatchTextLower(pg_wchar * t, int tlen, pg_wchar * p, int plen, char *e)
if ((plen <= 0) || (tolower(*t) != tolower(*p))) if ((plen <= 0) || (tolower(*t) != tolower(*p)))
return LIKE_FALSE; return LIKE_FALSE;
} }
else else if (*p == '%')
{ {
switch (*p)
{
case '\\':
/* Literal match with following character. */
NextChar(p, plen);
/* FALLTHROUGH */
default:
if (tolower(*t) != tolower(*p))
return LIKE_FALSE;
break;
case '_':
/* Match any single character. */
break;
case '%':
/* %% is the same as % according to the SQL standard */ /* %% is the same as % according to the SQL standard */
/* Advance past all %'s */ /* Advance past all %'s */
while ((plen > 0) && (*p == '%')) while ((plen > 0) && (*p == '%'))
@ -439,7 +417,7 @@ MatchTextLower(pg_wchar * t, int tlen, pg_wchar * p, int plen, char *e)
* recurse unless first pattern char might match this * recurse unless first pattern char might match this
* text char. * text char.
*/ */
if ((tolower(*t) == tolower(*p)) || (*p == '\\') || (*p == '_') if ((tolower(*t) == tolower(*p)) || (*p == '_')
|| ((e != NULL) && (tolower(*p) == tolower(*e)))) || ((e != NULL) && (tolower(*p) == tolower(*e))))
{ {
int matched = MatchText(t, tlen, p, plen, e); int matched = MatchText(t, tlen, p, plen, e);
@ -457,6 +435,9 @@ MatchTextLower(pg_wchar * t, int tlen, pg_wchar * p, int plen, char *e)
*/ */
return LIKE_ABORT; return LIKE_ABORT;
} }
else if ((*p != '_') && (tolower(*t) != tolower(*p)))
{
return LIKE_FALSE;
} }
NextChar(t, tlen); NextChar(t, tlen);