README.md

Decode Query String Using C

A tiny library for decode value of the query string using c with utf8 support and html entities.

Using

decodeUrl(destination,source);
decodeHtmlEntities(destination,source);

Functions

void decodeUrl(char *destination,const char *source);
size_t decodeHtmlEntities(char *destination,const char *source);
// char *urlDecode(const char *str);
// static inline char toUpper(char c);
static int parseEntity(const char *current,char **to,const char **from);
static size_t putUtf8Char(unsigned long value,char *buffer);
static const char *getNamedEntity(const char *name);
static int stringCompare(const void *key,const void *value);

Global Variable

// const char asciiHex[23] = {...};
static const char *const NamedEntities[][2] = {...};

Includes

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

Example I/O

Input: %D8%B3%D9%84%D8%A7%D9%85
Output: سلام

Input: HELLO%2C+%26%231587%3B%26%231604%3B%26%231575%3B%26%231605%3B+%2C+%26%231777%3B%26%231778%3B%26%231779%3B
Output: HELLO, سلام , ۱۲۳

Compile Example

$ git clone https://github.com/BaseMax/DecodeQueryStringC
$ cd DecodeQueryStringC/
$ cd example/
$ gcc main.c ../source/decodequery.c -o main
$ ./main

Copyright

Many resources have been used to implement this library. (Eg NamedEntities, ...)

Also, some of the code has been follow from certain libraries.

So, if you use this complete library, keep the author's name.

In addition, parts of the code have also been optimized. If you have any suggestions for improvement or correction, you can submit.

Thank You.