/*-------------------------------------------------------------------------
*
* quotes . c
* string quoting and escaping functions
*
* Portions Copyright ( c ) 1996 - 2025 , PostgreSQL Global Development Group
* Portions Copyright ( c ) 1994 , Regents of the University of California
*
*
* IDENTIFICATION
* src / port / quotes . c
*
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
*/
#include "c.h"
/*
* Escape ( by doubling ) any single quotes or backslashes in given string
*
* Note : this is used to process postgresql . conf entries and to quote
* string literals in pg_basebackup for writing the recovery configuration .
* Since postgresql . conf strings are defined to treat backslashes as escapes ,
* we have to double backslashes here .
*
* Since this function is only used for parsing or creating configuration
* files , we do not care about encoding considerations .
*
* Returns a malloced ( ) string that it ' s the responsibility of the caller
* to free .
*/
char *
escape_single_quotes_ascii(const char *src)
{
int len = strlen(src),
i,
j;
char *result = malloc(len * 2 + 1 );
if (!result)
return NULL;
for (i = 0 , j = 0 ; i < len; i++)
{
if (SQL_STR_DOUBLE(src[i], true ))
result[j++] = src[i];
result[j++] = src[i];
}
result[j] = '\0' ;
return result;
}
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