1/*-------------------------------------------------------------------------
2 *
3 * quotes.c
4 * string quoting and escaping functions
5 *
6 * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
7 * Portions Copyright (c) 1994, Regents of the University of California
8 *
9 *
10 * IDENTIFICATION
11 * src/port/quotes.c
12 *
13 *-------------------------------------------------------------------------
14 */
15
16#include "c.h"
17
18/*
19 * Escape (by doubling) any single quotes or backslashes in given string
20 *
21 * Note: this is used to process postgresql.conf entries and to quote
22 * string literals in pg_basebackup for writing the recovery configuration.
23 * Since postgresql.conf strings are defined to treat backslashes as escapes,
24 * we have to double backslashes here.
25 *
26 * Since this function is only used for parsing or creating configuration
27 * files, we do not care about encoding considerations.
28 *
29 * Returns a malloced() string that it's the responsibility of the caller
30 * to free.
31 */
32char *
33escape_single_quotes_ascii(const char *src)
34{
35 int len = strlen(src),
36 i,
37 j;
38 char *result = malloc(len * 2 + 1);
39
40 if (!result)
41 return NULL;
42
43 for (i = 0, j = 0; i < len; i++)
44 {
45 if (SQL_STR_DOUBLE(src[i], true))
46 result[j++] = src[i];
47 result[j++] = src[i];
48 }
49 result[j] = '\0';
50 return result;
51}
52