Age         Owner                  TLA  Line data    Source code

                                  1                 : /*-------------------------------------------------------------------------
                                  2                 :  *
                                  3                 :  * quotes.c
                                  4                 :  *    string quoting and escaping functions
                                  5                 :  *
                                  6                 :  * Portions Copyright (c) 1996-2023, 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                 :  */
                                 32                 : char *
 3746 magnus                     33 CBC        4300 : escape_single_quotes_ascii(const char *src)
                                 34                 : {
                                 35            4300 :     int         len = strlen(src),
                                 36                 :                 i,
                                 37                 :                 j;
                                 38            4300 :     char       *result = malloc(len * 2 + 1);
                                 39                 : 
                                 40            4300 :     if (!result)
 3746 magnus                     41 UBC           0 :         return NULL;
                                 42                 : 
 3746 magnus                     43 CBC       80608 :     for (i = 0, j = 0; i < len; i++)
                                 44                 :     {
                                 45           76308 :         if (SQL_STR_DOUBLE(src[i], true))
                                 46              28 :             result[j++] = src[i];
                                 47           76308 :         result[j++] = src[i];
                                 48                 :     }
                                 49            4300 :     result[j] = '\0';
                                 50            4300 :     return result;
                                 51                 : }