Make lpad/rpad/translate multibyte aware. Also add Copright notice etc.
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@ -1,8 +1,17 @@
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/*
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* Edmund Mergl <E.Mergl@bawue.de>
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/*-------------------------------------------------------------------------
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* oracle_compat.c
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* Oracle compatible functions.
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*
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/oracle_compat.c,v 1.34 2001/09/22 03:30:39 ishii Exp $
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* Copyright (c) 1997-2001, PostgreSQL Global Development Group
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*
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* Author: Edmund Mergl <E.Mergl@bawue.de>
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* Multibyte enhancement: Tatsuo Ishii <ishii@postgresql.org>
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/oracle_compat.c,v 1.35 2001/09/23 11:02:01 ishii Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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@ -162,6 +171,9 @@ lpad(PG_FUNCTION_ARGS)
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int m,
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s1len,
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s2len;
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#ifdef MULTIBYTE
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int bytelen;
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#endif
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/* Negative len is silently taken as zero */
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if (len < 0)
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@ -175,32 +187,62 @@ lpad(PG_FUNCTION_ARGS)
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if (s2len < 0)
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s2len = 0; /* shouldn't happen */
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#ifdef MULTIBYTE
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s1len = pg_mbstrlen_with_len(VARDATA(string1),s1len);
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#endif
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if (s1len > len)
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s1len = len; /* truncate string1 to len chars */
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if (s2len <= 0)
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len = s1len; /* nothing to pad with, so don't pad */
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#ifdef MULTIBYTE
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bytelen = pg_database_encoding_max_length() * len;
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ret = (text *) palloc(VARHDRSZ + bytelen);
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VARATT_SIZEP(ret) = VARHDRSZ + bytelen;
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#else
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ret = (text *) palloc(VARHDRSZ + len);
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VARATT_SIZEP(ret) = VARHDRSZ + len;
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#endif
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m = len - s1len;
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ptr2 = VARDATA(string2);
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ptr2end = ptr2 + s2len;
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ptr_ret = VARDATA(ret);
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#ifdef MULTIBYTE
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while (m--)
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{
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int mlen = pg_mblen(ptr2);
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memcpy(ptr_ret, ptr2, mlen);
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ptr_ret += mlen;
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ptr2 += mlen;
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if (ptr2 == ptr2end) /* wrap around at end of s2 */
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ptr2 = VARDATA(string2);
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}
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#else
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while (m--)
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{
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*ptr_ret++ = *ptr2++;
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if (ptr2 == ptr2end) /* wrap around at end of s2 */
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ptr2 = VARDATA(string2);
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}
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#endif
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ptr1 = VARDATA(string1);
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#ifdef MULTIBYTE
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while (s1len--)
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{
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int mlen = pg_mblen(ptr1);
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memcpy(ptr_ret, ptr1, mlen);
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ptr_ret += mlen;
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ptr1 += mlen;
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}
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#else
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while (s1len--)
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*ptr_ret++ = *ptr1++;
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#endif
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PG_RETURN_TEXT_P(ret);
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}
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@ -236,6 +278,9 @@ rpad(PG_FUNCTION_ARGS)
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int m,
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s1len,
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s2len;
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#ifdef MULTIBYTE
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int bytelen;
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#endif
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/* Negative len is silently taken as zero */
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if (len < 0)
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@ -249,32 +294,63 @@ rpad(PG_FUNCTION_ARGS)
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if (s2len < 0)
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s2len = 0; /* shouldn't happen */
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#ifdef MULTIBYTE
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s1len = pg_mbstrlen_with_len(VARDATA(string1),s1len);
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#endif
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if (s1len > len)
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s1len = len; /* truncate string1 to len chars */
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if (s2len <= 0)
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len = s1len; /* nothing to pad with, so don't pad */
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#ifdef MULTIBYTE
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bytelen = pg_database_encoding_max_length() * len;
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ret = (text *) palloc(VARHDRSZ + bytelen);
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VARATT_SIZEP(ret) = VARHDRSZ + bytelen;
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#else
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ret = (text *) palloc(VARHDRSZ + len);
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VARATT_SIZEP(ret) = VARHDRSZ + len;
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#endif
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m = len - s1len;
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ptr1 = VARDATA(string1);
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ptr_ret = VARDATA(ret);
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#ifdef MULTIBYTE
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while (s1len--)
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{
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int mlen = pg_mblen(ptr1);
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memcpy(ptr_ret, ptr1, mlen);
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ptr_ret += mlen;
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ptr1 += mlen;
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}
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#else
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while (s1len--)
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*ptr_ret++ = *ptr1++;
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#endif
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ptr2 = VARDATA(string2);
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ptr2end = ptr2 + s2len;
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#ifdef MULTIBYTE
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while (m--)
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{
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int mlen = pg_mblen(ptr2);
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memcpy(ptr_ret, ptr2, mlen);
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ptr_ret += mlen;
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ptr2 += mlen;
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if (ptr2 == ptr2end) /* wrap around at end of s2 */
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ptr2 = VARDATA(string2);
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}
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#else
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while (m--)
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{
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*ptr_ret++ = *ptr2++;
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if (ptr2 == ptr2end) /* wrap around at end of s2 */
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ptr2 = VARDATA(string2);
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}
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#endif
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PG_RETURN_TEXT_P(ret);
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}
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@ -708,6 +784,13 @@ translate(PG_FUNCTION_ARGS)
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tolen,
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retlen,
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i;
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#ifdef MULTIBYTE
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int str_len;
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int estimate_len;
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int len;
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int source_len;
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int from_index;
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#endif
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if ((m = VARSIZE(string) - VARHDRSZ) <= 0)
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PG_RETURN_TEXT_P(string);
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@ -717,12 +800,65 @@ translate(PG_FUNCTION_ARGS)
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tolen = VARSIZE(to) - VARHDRSZ;
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to_ptr = VARDATA(to);
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#ifdef MULTIBYTE
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str_len = VARSIZE(string);
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estimate_len = (tolen*1.0/fromlen + 0.5)*str_len;
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estimate_len = estimate_len>str_len?estimate_len:str_len;
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result = (text *) palloc(estimate_len);
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#else
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result = (text *) palloc(VARSIZE(string));
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#endif
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source = VARDATA(string);
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target = VARDATA(result);
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retlen = 0;
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#ifdef MULTIBYTE
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while (m > 0)
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{
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source_len = pg_mblen(source);
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from_index = 0;
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for (i = 0; i < fromlen; i += len)
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{
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len = pg_mblen(&from_ptr[i]);
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if (len == source_len &&
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memcmp(source, &from_ptr[i], len) == 0)
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break;
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from_index++;
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}
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if (i < fromlen)
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{
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/* substitute */
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char *p = to_ptr;
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for (i=0;i<from_index;i++)
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{
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p += pg_mblen(p);
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if (p >= (to_ptr + tolen))
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break;
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}
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if (p < (to_ptr + tolen))
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{
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len = pg_mblen(p);
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memcpy(target, p, len);
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target += len;
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retlen += len;
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}
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}
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else
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{
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/* no match, so copy */
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memcpy(target, source, source_len);
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target += source_len;
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retlen += source_len;
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}
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source += source_len;
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m -= source_len;
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}
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#else
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while (m-- > 0)
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{
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char rep = *source++;
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@ -752,6 +888,7 @@ translate(PG_FUNCTION_ARGS)
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retlen++;
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}
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}
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#endif
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VARATT_SIZEP(result) = retlen + VARHDRSZ;
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