/*
 * ================================
 * eli960@qq.com
 * http://linuxmail.cn/
 * 2021-04-23
 * ================================
 */

#include "zcc/zcc_stdlib.h"

zcc_namespace_begin;

void uudecode(const void *src, int src_size, std::string &str)
{
    const unsigned char *s = (const unsigned char *)src;
    if (src_size < 0)
    {
        src_size = (int)std::strlen((const char *)s);
    }
    const unsigned char *e = s + src_size;

    while (s < e - 4)
    {
        int v = 0;
        int i;
        for (i = 0; i < 4; i += 1)
        {
            int c = *s++;
            v = v << 6 | ((c - 0x20) & 0x3F);
        }
        for (i = 2; i >= 0; i -= 1)
        {
            int c = (v & 0xFF);
            str.push_back((char)c);
            v = v >> 8;
        }
    }
    while (s < e)
    {
        int c = *s++;
        str.push_back((char)c);
    }
}

zcc_namespace_end;