Import luanet library

[project/luci.git] / libs / luanet / src / base64.c

diff --git a/libs/luanet/src/base64.c b/libs/luanet/src/base64.c
new file mode 100644 (file)
index 0000000..f897cf7
--- /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;
+}