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/* -------------------------------------------------------------
RabbitMQ TCL - String utilities header library
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/_/ |_| \__,_/ /_.___//_.___//_/ \__/ /_/ /_/ \___\_\
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RabbitMQ C AMQP client library TCL wrapper ___ __/_ ____/__ /
TCL module to connect to AMQP brokers. __ / _ / __ /
_ / / /___ _ /___
(c) 2015, Nasqueron, some rights reserved. /_/ \____/ /_____/
Released under BSD-2-Clause license.
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Software: RabbitMQ TCL
Author: Sébastien Santoro aka Dereckson
Filename: strutils.h
Created: 2015-12-08
Licence: BSD-2-Clause
------------------------------------------------------------- */
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
/* -------------------------------------------------------------
Magic constants
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#define STR_NOT_FOUND -1
/* -------------------------------------------------------------
Common string functions inspired by PHP standard functions:
strpos
str_replace
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/**
* Finds the position of the first occurrence of a substring in a string
*
* @param[in] haystack The string to search in
* @param[in] needle The string to search
* @return The position of where the needle exists, or STR_NOT_FOUND
*/
int strpos(const char *haystack, const char *needle) {
// http://stackoverflow.com/a/7655509/1930997 - snippet by Miere
char *p = strstr(haystack, needle);
if (p)
return p - haystack;
return STR_NOT_FOUND;
}
/**
* Replaces all occurrences of the search string with the replacement string
*
* @param[in] needle The value being searched for (search)
* @param[in] replace The replacement value
* @param[in] haystack The string being searched and replaced on (subject)
* @return A string with the replaced values
*/
char *str_replace(const char *needle, const char *replace, char *haystack) {
// This code is based on a str_replace function designed by
// Chantra <chantra@debuntu.org> and Iain R. Learmonth <irl@sdf.org>
// Source: https://github.com/irl/la-cucina/blob/master/str_replace.c
char *token = NULL;
char *replacedString = NULL;
char *oldString = NULL;
int oldStringLen = 0;
int needleLen = 0;
int replaceLen = 0;
int len; // Stores len before a malloc call
replacedString = strdup(haystack);
needleLen = strlen(needle);
replaceLen = strlen(replace);
if (needle == NULL || replace == NULL || needleLen == 0) {
return replacedString;
}
while ((token = strstr(replacedString, needle))) {
oldString = replacedString;
oldStringLen = strlen(oldString);
len = oldStringLen - needleLen + replaceLen + 1;
replacedString = (char *)malloc(sizeof(char) * len);
if (replacedString == NULL) {
free(oldString);
return NULL;
}
memcpy(replacedString, oldString, token - oldString);
memcpy(replacedString + (token - oldString), replace, replaceLen);
memcpy(replacedString + (token - oldString) + replaceLen,
token + needleLen,
oldStringLen - needleLen - (token - oldString));
memset(replacedString + oldStringLen - needleLen + replaceLen, 0, 1);
free(oldString);
}
return replacedString;
}

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