base32_bch.c

#include <stdio.h>
#include <stdlib.h>
#include "common.h"

#include "base32_bch.h"
/**
* Charset containing the 32 symbols used in the base32 encoding.
* @private
*/
char CHARSET[] = "qpzry9x8gf2tvdw0s3jn54khce6mua7l";

/**
* Inverted index mapping each symbol into its index within the charset.
* @private
*/
/*
var CHARSET_INVERSE_INDEX = {
	'q': 0, 'p' : 1, 'z' : 2, 'r' : 3, 'y' : 4, '9' : 5, 'x' : 6, '8' : 7,
	'g' : 8, 'f' : 9, '2' : 10, 't' : 11, 'v' : 12, 'd' : 13, 'w' : 14, '0' : 15,
	's' : 16, '3' : 17, 'j' : 18, 'n' : 19, '5' : 20, '4' : 21, 'k' : 22, 'h' : 23,
	'c' : 24, 'e' : 25, '6' : 26, 'm' : 27, 'u' : 28, 'a' : 29, '7' : 30, 'l' : 31,
};
*/
/**
* Encodes the given array of 5-bit integers as a base32-encoded string.
*
* @static
* @param {Uint8Array} data Array of integers between 0 and 31 inclusive.
* @returns {string}
* @throws {ValidationError}
*/
char* base32_encode(uint8_t* data, int datalen) {
	//validate(data instanceof Uint8Array, 'Invalid data: ' + data + '.');
	char* base32 = malloc(datalen);
	memset(base32, 0, datalen);
	for (int i = 0; i < datalen; ++i) {
		int value = data[i];
		//validate(0 <= value && value < 32, 'Invalid value: ' + value + '.');
		base32[i] = CHARSET[value];
	}
	return base32;
}

/**
* Decodes the given base32-encoded string into an array of 5-bit integers.
*
* @static
* @param {string} string
* @returns {Uint8Array}
* @throws {ValidationError}
*/
/*
function decode(string) {
	validate(typeof string == = 'string', 'Invalid base32-encoded string: ' + string + '.');
	var data = new Uint8Array(string.length);
	for (var i = 0; i < string.length; ++i) {
		var value = string[i];
		validate(value in CHARSET_INVERSE_INDEX, 'Invalid value: ' + value + '.');
		data[i] = CHARSET_INVERSE_INDEX[value];
	}
	return data;
}
*/