--- a/telepathygabble/src/base64.c Tue Feb 02 01:10:06 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,196 +0,0 @@
-/*
- * base64.c - Base 64 encoding/decoding implementation
- * Copyright (C) 2006 Collabora Ltd.
- *
- * This library 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.
- *
- * This library 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 this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "base64.h"
-
-#define DEBUG_FLAG GABBLE_DEBUG_VCARD
-#include "debug.h"
-
-#include <ctype.h>
-#include <string.h>
-
-#include <glib.h>
-
-/*
-|AAAA AABB|BBBB CCCC|CCDD DDDD|
-
-0xFC = 1111 1100
-0x03 = 0000 0011
-0xF0 = 1111 0000
-0x0F = 0000 1111
-0xC0 = 1100 0000
-0x3F = 0011 1111
-
-3 input bytes = 4 output bytes;
-2 input bytes = 2 output bytes;
-1 input byte = 1 output byte.
-*/
-
-static const gchar *encoding =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-static const guint decoding[256] =
-{
- /* ... */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0,
- /* + */
- 62,
- /* ... */
- 0, 0, 0,
- /* / , 0-9 */
- 63,
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61,
- /* ... */
- 0, 0, 0, 0, 0, 0, 0,
- /* A */
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
- 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
- /* ... */
- 0, 0, 0, 0, 0, 0,
- /* a */
- 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38,
- 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
-};
-
-#define GET_6_BITS_0(s) (((s)[0] & 0xFC) >> 2)
-#define GET_6_BITS_1(s) (((s)[0] & 0x03) << 4) | \
- (((s)[1] & 0xF0) >> 4)
-#define GET_6_BITS_2(s) (((s)[1] & 0x0F) << 2) | \
- (((s)[2] & 0xC0) >> 6)
-#define GET_6_BITS_3(s) (((s)[2] & 0x3F) << 0)
-
-#define GET_BYTE_0(s) (((decoding[(guchar)(s)[0]] & 0x3F) << 2) | \
- ((decoding[(guchar)(s)[1]] & 0x30) >> 4))
-#define GET_BYTE_1(s) (((decoding[(guchar)(s)[1]] & 0x0F) << 4) | \
- ((decoding[(guchar)(s)[2]] & 0x3C) >> 2))
-#define GET_BYTE_2(s) (((decoding[(guchar)(s)[2]] & 0x03) << 6) | \
- ((decoding[(guchar)(s)[3]] & 0xFF) << 0))
-
-gchar *base64_encode (guint len, const gchar *str)
-{
- guint i;
- GString *tmp;
-
- /* TODO: calculate requisite output string length and allocate that big a
- * GString */
- tmp = g_string_new ("");
-
- for (i = 0; i < len; i += 3)
- {
- guint c1, c2, c3, c4;
-
- if (i > 0 && (i * 4) % 76 == 0)
- g_string_append_c (tmp, '\n');
-
- switch (i + 3 - len)
- {
- case 1:
- c1 = encoding[GET_6_BITS_0 (str + i)];
- c2 = encoding[GET_6_BITS_1 (str + i)];
- /* can't use GET_6_BITS_2 because str[i+2] is out of range */
- c3 = encoding[(str[i + 1] & 0x0f) << 2];
- c4 = '=';
- break;
- case 2:
- c1 = encoding[GET_6_BITS_0 (str + i)];
- /* can't use GET_6_BITS_1 because str[i+1] is out of range */
- c2 = encoding[(str[i] & 0x03) << 4];
- c3 = '=';
- c4 = '=';
- break;
- default:
- c1 = encoding[GET_6_BITS_0 (str + i)];
- c2 = encoding[GET_6_BITS_1 (str + i)];
- c3 = encoding[GET_6_BITS_2 (str + i)];
- c4 = encoding[GET_6_BITS_3 (str + i)];
- }
-
- g_string_append_printf (tmp, "%c%c%c%c", c1, c2, c3, c4);
- }
-
- return g_string_free (tmp, FALSE);
-}
-
-GString *base64_decode (const gchar *str)
-{
- guint i;
- GString *tmp;
- char group[4];
- guint filled = 0;
-
- for (i = 0; str[i]; i++)
- {
- if (str[i] != 'A' &&
- str[i] != '=' &&
- !isspace (str[i]) &&
- decoding[(guchar) str[i]] == 0)
- {
- gabble_debug (DEBUG_FLAG, "bad character %x at byte %u", (guchar)str[i], i);
- return NULL;
- }
- }
-
- tmp = g_string_new ("");
-
- for (i = 0; str[i]; i++)
- {
- if (isspace (str[i]))
- continue;
-
- group[filled++] = str[i];
-
- if (filled == 4)
- {
- if (group[3] == '=')
- {
- if (group[2] == '=')
- {
- g_string_append_c (tmp, GET_BYTE_0(group));
- }
- else
- {
- g_string_append_c (tmp, GET_BYTE_0(group));
- g_string_append_c (tmp, GET_BYTE_1(group));
- }
- }
- else
- {
- g_string_append_c (tmp, GET_BYTE_0(group));
- g_string_append_c (tmp, GET_BYTE_1(group));
- g_string_append_c (tmp, GET_BYTE_2(group));
- }
- filled = 0;
- }
- }
-
- if (filled)
- {
- gabble_debug (DEBUG_FLAG, "insufficient padding at end of base64 string:\n%s", str);
- g_string_free (tmp, TRUE);
- return NULL;
- }
-
- return tmp;
-}
-
-