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Diffstat (limited to 'libs/luanet/src/base64.c')
| -rw-r--r-- | libs/luanet/src/base64.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/libs/luanet/src/base64.c b/libs/luanet/src/base64.c new file mode 100644 index 000000000..f897cf7aa --- /dev/null +++ b/libs/luanet/src/base64.c @@ -0,0 +1,121 @@ +/* + * Base64.c + * Copyright (c) 2006 Ryan Martell. (rdm4@martellventures.com) + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include <lua.h> +#include <lualib.h> +#include <lauxlib.h> + + +unsigned char map2[] = +{ + 0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36, + 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x01, + 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, + 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, + 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b, + 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, + 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, + 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33 +}; + +int b64_decode(lua_State *L) +{ + int i, v; + unsigned char out[512]; + unsigned char *dst = out; + char *in; + if(lua_gettop(L) != 1) + { + lua_pushstring(L, "invalid arg list"); + lua_error(L); + return 0; + } + in = (char *)lua_tostring (L, 1); + v = 0; + for (i = 0; in[i] && in[i] != '='; i++) { + unsigned int index= in[i]-43; + if (index>=(sizeof(map2)/sizeof(map2[0])) || map2[index] == 0xff) + return -1; + v = (v << 6) + map2[index]; + if (i & 3) { + if (dst - out < 512) { + *dst++ = v >> (6 - 2 * (i & 3)); + } + } + } + if(!(dst - out)) + return 0; + lua_pushstring(L, (char*)out); + return 1; +} + +/***************************************************************************** +* b64_encode: stolen from VLC's http.c +* simplified by michael +* fixed edge cases and made it work from data (vs. strings) by ryan. +*****************************************************************************/ + +int b64_encode(lua_State *L) +{ + static const char b64[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + char *ret, *dst, *src, tmp[1024]; + unsigned i_bits = 0; + int i_shift = 0; + int bytes_remaining, len; + if(lua_gettop(L) != 1) + { + lua_pushstring(L, "invalid arg list"); + lua_error(L); + return 0; + } + src = (char *)lua_tostring (L, 1); + bytes_remaining = len = strlen(src); + if (len < 512) { + ret = dst = tmp; + } else + return 0; + + if (len) { // special edge case, what should we really do here? + while (bytes_remaining) { + i_bits = (i_bits << 8) + *src++; + bytes_remaining--; + i_shift += 8; + + do { + *dst++ = b64[(i_bits << 6 >> i_shift) & 0x3f]; + i_shift -= 6; + } while (i_shift > 6 || (bytes_remaining == 0 && i_shift > 0)); + } + while ((dst - ret) & 3) + *dst++ = '='; + } + *dst = '\0'; + lua_pushstring(L, tmp); + return 1; +} |