mirror of
https://github.com/psycopg/psycopg2.git
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106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/* utils.c - miscellaneous utility functions
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*
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* Copyright (C) 2008-2010 Federico Di Gregorio <fog@debian.org>
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*
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* This file is part of psycopg.
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*
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* psycopg2 is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published
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* by the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link this program with the OpenSSL library (or with
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* modified versions of OpenSSL that use the same license as OpenSSL),
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* and distribute linked combinations including the two.
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*
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* You must obey the GNU Lesser General Public License in all respects for
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* all of the code used other than OpenSSL.
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*
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* psycopg2 is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*/
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#include <Python.h>
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#include <string.h>
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#include "psycopg/config.h"
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#include "psycopg/psycopg.h"
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#include "psycopg/connection.h"
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#include "psycopg/pgtypes.h"
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#include "psycopg/pgversion.h"
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#include <stdlib.h>
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char *
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psycopg_escape_string(PyObject *obj, const char *from, Py_ssize_t len,
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char *to, Py_ssize_t *tolen)
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{
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Py_ssize_t ql;
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connectionObject *conn = (connectionObject*)obj;
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int eq = (conn && (conn->equote)) ? 1 : 0;
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if (len == 0)
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len = strlen(from);
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if (to == NULL) {
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to = (char *)PyMem_Malloc((len * 2 + 4) * sizeof(char));
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if (to == NULL)
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return NULL;
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}
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#ifndef PSYCOPG_OWN_QUOTING
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{
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#if PG_VERSION_HEX >= 0x080104
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int err;
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if (conn && conn->pgconn)
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ql = PQescapeStringConn(conn->pgconn, to+eq+1, from, len, &err);
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else
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#endif
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ql = PQescapeString(to+eq+1, from, len);
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}
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#else
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{
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int i, j;
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for (i=0, j=eq+1; i<len; i++) {
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switch(from[i]) {
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case '\'':
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to[j++] = '\'';
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to[j++] = '\'';
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break;
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case '\\':
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to[j++] = '\\';
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to[j++] = '\\';
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break;
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case '\0':
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/* do nothing, embedded \0 are discarded */
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break;
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default:
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to[j++] = from[i];
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}
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}
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to[j] = '\0';
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Dprintf("qstring_quote: to = %s", to);
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ql = strlen(to);
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}
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#endif
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if (eq)
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to[0] = 'E';
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to[eq] = '\'';
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to[ql+eq+1] = '\'';
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to[ql+eq+2] = '\0';
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if (tolen)
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*tolen = ql+eq+2;
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return to;
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}
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