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Postgres FD Implementation
Commit 3e90401c authored by Tatsuo Ishii's avatar Tatsuo Ishii
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*** empty log message ***

parent 91778e89
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Showing with 145 additions and 4 deletions
src/backend/utils/adt/oracle_compat.c
View file @ 3e90401c
/*
* Edmund Mergl <E.Mergl@bawue.de>
*
* $Header: /cvsroot/pgsql/src/backend/utils/adt/oracle_compat.c,v 1.32 2001/09/14 17:46:40 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/oracle_compat.c,v 1.33 2001/09/22 03:26:30 ishii Exp $
*
*/
......@@ -11,6 +11,9 @@
#include "utils/builtins.h"
#ifdef MULTIBYTE
#include "mb/pg_wchar.h"
#endif
/********************************************************************
*
......@@ -304,14 +307,82 @@ btrim(PG_FUNCTION_ARGS)
*end2;
int m;
#ifdef MULTIBYTE
char **mp;
int mplen;
char *p;
int mblen;
int len;
#endif
if ((m = VARSIZE(string) - VARHDRSZ) <= 0 ||
(VARSIZE(set) - VARHDRSZ) <= 0)
PG_RETURN_TEXT_P(string);
ptr = VARDATA(string);
#ifdef MULTIBYTE
len = m;
mp = (char **)palloc(len*sizeof(char *));
p = ptr;
mplen = 0;
/* build the mb pointer array */
while (len > 0)
{
mp[mplen++] = p;
mblen = pg_mblen(p);
p += mblen;
len -= mblen;
}
mplen--;
#else
end = VARDATA(string) + VARSIZE(string) - VARHDRSZ - 1;
#endif
end2 = VARDATA(set) + VARSIZE(set) - VARHDRSZ - 1;
#ifdef MULTIBYTE
while (m > 0)
{
int str_len = pg_mblen(ptr);
ptr2 = VARDATA(set);
while (ptr2 <= end2)
{
int set_len = pg_mblen(ptr2);
if (str_len == set_len &&
memcmp(ptr,ptr2,str_len) == 0)
break;
ptr2 += set_len;
}
if (ptr2 > end2)
break;
ptr += str_len;
m -= str_len;
}
while (m > 0)
{
int str_len;
end = mp[mplen--];
str_len = pg_mblen(end);
ptr2 = VARDATA(set);
while (ptr2 <= end2)
{
int set_len = pg_mblen(ptr2);
if (str_len == set_len &&
memcmp(end,ptr2,str_len) == 0)
break;
ptr2 += set_len;
}
if (ptr2 > end2)
break;
m -= str_len;
}
pfree(mp);
#else
while (m > 0)
{
ptr2 = VARDATA(set);
......@@ -341,7 +412,7 @@ btrim(PG_FUNCTION_ARGS)
end--;
m--;
}
#endif
ret = (text *) palloc(VARHDRSZ + m);
VARATT_SIZEP(ret) = VARHDRSZ + m;
memcpy(VARDATA(ret), ptr, m);
......@@ -455,6 +526,26 @@ ltrim(PG_FUNCTION_ARGS)
ptr = VARDATA(string);
end2 = VARDATA(set) + VARSIZE(set) - VARHDRSZ - 1;
#ifdef MULTIBYTE
while (m > 0)
{
int str_len = pg_mblen(ptr);
ptr2 = VARDATA(set);
while (ptr2 <= end2)
{
int set_len = pg_mblen(ptr2);
if (str_len == set_len &&
memcmp(ptr,ptr2,str_len) == 0)
break;
ptr2 += set_len;
}
if (ptr2 > end2)
break;
ptr += str_len;
m -= str_len;
}
#else
while (m > 0)
{
ptr2 = VARDATA(set);
......@@ -469,7 +560,7 @@ ltrim(PG_FUNCTION_ARGS)
ptr++;
m--;
}
#endif
ret = (text *) palloc(VARHDRSZ + m);
VARATT_SIZEP(ret) = VARHDRSZ + m;
memcpy(VARDATA(ret), ptr, m);
......@@ -499,20 +590,70 @@ rtrim(PG_FUNCTION_ARGS)
text *string = PG_GETARG_TEXT_P(0);
text *set = PG_GETARG_TEXT_P(1);
text *ret;
char *ptr,
*end,
*ptr2,
*end2;
int m;
#ifdef MULTIBYTE
char **mp;
int mplen;
char *p;
int mblen;
int len;
#endif
if ((m = VARSIZE(string) - VARHDRSZ) <= 0 ||
(VARSIZE(set) - VARHDRSZ) <= 0)
PG_RETURN_TEXT_P(string);
ptr = VARDATA(string);
#ifdef MULTIBYTE
len = m;
mp = (char **)palloc(len*sizeof(char *));
p = ptr;
mplen = 0;
/* build the mb pointer array */
while (len > 0)
{
mp[mplen++] = p;
mblen = pg_mblen(p);
p += mblen;
len -= mblen;
}
mplen--;
#else
end = VARDATA(string) + VARSIZE(string) - VARHDRSZ - 1;
#endif
end2 = VARDATA(set) + VARSIZE(set) - VARHDRSZ - 1;
#ifdef MULTIBYTE
while (m > 0)
{
int str_len;
end = mp[mplen--];
str_len = pg_mblen(end);
ptr2 = VARDATA(set);
while (ptr2 <= end2)
{
int set_len = pg_mblen(ptr2);
if (str_len == set_len &&
memcmp(end,ptr2,str_len) == 0)
break;
ptr2 += set_len;
}
if (ptr2 > end2)
break;
m -= str_len;
}
pfree(mp);
#else
while (m > 0)
{
ptr2 = VARDATA(set);
......@@ -527,7 +668,7 @@ rtrim(PG_FUNCTION_ARGS)
end--;
m--;
}
#endif
ret = (text *) palloc(VARHDRSZ + m);
VARATT_SIZEP(ret) = VARHDRSZ + m;
memcpy(VARDATA(ret), ptr, m);
......
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