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* DB2Modeler/COPYING: Update to GPL 3. * *.*: Update copyright notices. git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gdl2/trunk@25326 72102866-910b-0410-8b05-ffd578937521
150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
/**
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PostgreSQLCompatibility.h
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Copyright (C) 2004,2005 Free Software Foundation, Inc.
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Adapted: David Ayers <ayers@fsfe.org>
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Date: September 2004
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$Revision$
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$Date$
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<abstract></abstract>
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This file is part of the GNUstep Database Library.
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<license>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 3 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; see the file COPYING.LIB.
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If not, write to the Free Software Foundation,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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</license>
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**/
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#if !HAVE_DECL_PQFREEMEM
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#define PQfreemem free
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#endif
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#if !HAVE_DECL_PQUNESCAPEBYTEA
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#include <stdlib.h>
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#include <string.h>
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/*
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* PQunescapeBytea - converts the null terminated string representation
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* of a bytea, strtext, into binary, filling a buffer. It returns a
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* pointer to the buffer which is NULL on error, and the size of the
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* buffer in retbuflen. The pointer may subsequently be used as an
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* argument to the function free(3). It is the reverse of PQescapeBytea.
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*
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* The following transformations are reversed:
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* '\0' == ASCII 0 == \000
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* '\'' == ASCII 39 == \'
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* '\\' == ASCII 92 == \\
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*
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* States:
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* 0 normal 0->1->2->3->4
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* 1 \ 1->5
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* 2 \0 1->6
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* 3 \00
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* 4 \000
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* 5 \'
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* 6 \\
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*/
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#define PSQL_ATTRIB_UNUSED __attribute__ ((unused))
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static unsigned char *
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PQunescapeBytea(unsigned char *strtext, size_t *retbuflen) PSQL_ATTRIB_UNUSED;
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static unsigned char *
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PQunescapeBytea(unsigned char *strtext, size_t *retbuflen)
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{
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size_t buflen;
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unsigned char *buffer, *sp,*bp;
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unsigned int state = 0;
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if (strtext == NULL)
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return NULL;
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buflen = strlen(strtext); /* will shrink, also we discover if
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* strtext */
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buffer = (unsigned char *) malloc(buflen); /* isn't NULL terminated */
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if (buffer == NULL)
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return NULL;
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for (bp = buffer, sp = strtext; *sp != '\0'; bp++, sp++)
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{
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switch (state)
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{
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case 0:
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if (*sp == '\\')
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state = 1;
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*bp = *sp;
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break;
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case 1:
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if (*sp == '\'') /* state=5 */
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{ /* replace \' with 39 */
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bp--;
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*bp = '\'';
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buflen--;
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state = 0;
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}
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else if (*sp == '\\') /* state=6 */
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{ /* replace \\ with 92 */
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bp--;
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*bp = '\\';
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buflen--;
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state = 0;
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}
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else
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{
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if (isdigit(*sp))
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state = 2;
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else
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state = 0;
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*bp = *sp;
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}
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break;
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case 2:
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if (isdigit(*sp))
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state = 3;
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else
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state = 0;
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*bp = *sp;
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break;
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case 3:
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if (isdigit(*sp)) /* state=4 */
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{
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int v;
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bp -= 3;
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sscanf(sp - 2, "%03o", &v);
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*bp = v;
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buflen -= 3;
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state = 0;
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}
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else
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{
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*bp = *sp;
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state = 0;
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}
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break;
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}
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}
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buffer = realloc(buffer, buflen);
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if (buffer == NULL)
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return NULL;
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*retbuflen = buflen;
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return buffer;
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}
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#endif
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