3 * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com)
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
32 unsigned char map2[] =
34 0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
35 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
36 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01,
37 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
38 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
39 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
40 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
41 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
42 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
43 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
46 int b64_decode(lua_State *L)
49 unsigned char out[512];
50 unsigned char *dst = out;
52 if(lua_gettop(L) != 1)
54 lua_pushstring(L, "invalid arg list");
58 in = (char *)lua_tostring (L, 1);
60 for (i = 0; in[i] && in[i] != '='; i++) {
61 unsigned int index= in[i]-43;
62 if (index>=(sizeof(map2)/sizeof(map2[0])) || map2[index] == 0xff)
64 v = (v << 6) + map2[index];
66 if (dst - out < 512) {
67 *dst++ = v >> (6 - 2 * (i & 3));
73 lua_pushlstring(L, (char*)out, dst - out);
77 /*****************************************************************************
78 * b64_encode: stolen from VLC's http.c
79 * simplified by michael
80 * fixed edge cases and made it work from data (vs. strings) by ryan.
81 *****************************************************************************/
83 int b64_encode(lua_State *L)
85 static const char b64[] =
86 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
87 char *ret, *dst, *src, tmp[1024];
90 int bytes_remaining, len;
91 if(lua_gettop(L) != 1)
93 lua_pushstring(L, "invalid arg list");
97 src = (char *)lua_tostring (L, 1);
98 bytes_remaining = len = strlen(src);
104 if (len) { // special edge case, what should we really do here?
105 while (bytes_remaining) {
106 i_bits = (i_bits << 8) + *src++;
111 *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f];
113 } while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0));
115 while ((dst - ret) & 3)
119 lua_pushstring(L, tmp);