mirror of
https://github.com/love2d/love.git
synced 2026-08-12 08:30:56 +02:00
Alex Szpakowski
81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
/**
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* Copyright (c) 2006-2014 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "b64.h"
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namespace love
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{
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static const char cd64[]="|$$$}rstuvwxyz{$$$$$$$>?@ABCDEFGHIJKLMNOPQRSTUVW$$$$$$XYZ[\\]^_`abcdefghijklmnopq";
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static void b64_decode_block(char in[4], char out[3])
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{
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out[0] = (char)(in[0] << 2 | in[1] >> 4);
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out[1] = (char)(in[1] << 4 | in[2] >> 2);
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out[2] = (char)(((in[2] << 6) & 0xc0) | in[3]);
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}
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char *b64_decode(const char *src, int slen, int &size)
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{
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size = (slen / 4) * 3;
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char *dst = new char[size];
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char *d = dst;
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char in[4] = {0}, out[3], v;
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int i, len, pos = 0;
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while (pos <= slen)
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{
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for (len = 0, i = 0; i < 4 && pos <= slen; i++)
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{
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v = 0;
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while (pos <= slen && v == 0)
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{
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v = src[pos++];
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v = (char)((v < 43 || v > 122) ? 0 : cd64[v - 43]);
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if (v)
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v = (char)((v == '$') ? 0 : v - 61);
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}
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if (pos <= slen)
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{
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len++;
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if (v)
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in[i] = (char)(v - 1);
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}
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else
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in[i] = 0;
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}
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if (len)
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{
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b64_decode_block(in, out);
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for (i = 0; i < len - 1; i++)
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*(d++) = out[i];
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}
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}
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return dst;
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}
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} // love
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