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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) {
char *tok = NULL;
char *newstr = NULL;
char *oldstr = NULL;
int oldstr_len = 0;
int needle_len = 0;
int replacement_len = 0;
newstr = strdup(haystack);
needle_len = strlen(needle);
replacement_len = strlen(replace);
if (needle == NULL || replace == NULL || needle_len == 0) {
return newstr;
}
while ((tok = strstr(newstr, needle))) {
oldstr = newstr;
oldstr_len = strlen(oldstr);
newstr = (char *)malloc(
sizeof(char) * (oldstr_len - needle_len + replacement_len + 1));
if (newstr == NULL) {
free(oldstr);
return NULL;
}
memcpy(newstr, oldstr, tok - oldstr);
memcpy(newstr + (tok - oldstr), replace, replacement_len);
memcpy(newstr + (tok - oldstr) + replacement_len, tok + needle_len,
oldstr_len - needle_len - (tok - oldstr));
memset(newstr + oldstr_len - needle_len + replacement_len, 0, 1);
free(oldstr);
}
return newstr;
}

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