PostgreSQL Source Code  git master
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros
quotes.c
Go to the documentation of this file.
1 /*-------------------------------------------------------------------------
2  *
3  * quotes.c
4  * string quoting and escaping functions
5  *
6  * Portions Copyright (c) 1996-2017, 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 creating recovery.conf.
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  */
32 char *
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 }
char * escape_single_quotes_ascii(const char *src)
Definition: quotes.c:33
return result
Definition: formatting.c:1618
#define malloc(a)
Definition: header.h:50
#define NULL
Definition: c.h:229
int i
#define SQL_STR_DOUBLE(ch, escape_backslash)
Definition: c.h:507