A lot of changes in the way the parsing works. I am too lazy

to find all the changes.
Important notice, I added uggly hacks to camel-formatter.c
and message-browser so that I could test b64 decoding.

Saving streams works. Have to implement qp now.

svn path=/trunk/; revision=1893

1 files changed, 305 insertions, 0 deletions

diff --git a/camel/camel-stream-b64.c b/camel/camel-stream-b64.c
new file mode 100644
index 0000000000..f43e89d982
--- /dev/null
+++ b/camel/camel-stream-b64.c
@@ -0,0 +1,305 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+
+
+/* 
+ *
+ * Author : 
+ *  Bertrand Guiheneuf <bertrand@helixcode.com>
+ *
+ * Copyright 1999, 2000 HelixCode (http://www.helixcode.com) .
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as 
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+#include <config.h>
+#include "camel-stream-b64.h"
+
+
+
+
+static CamelStreamClass *parent_class = NULL;
+
+static guchar char_to_six_bits [256] = {
+	66, 66, 66, 66, 66, 66, 66, 66, /*   0 .. 7   */
+	66, 66, 66, 66, 66, 66, 66, 66, /*   8 .. 15  */
+	66, 66, 66, 66, 66, 66, 66, 66, /*  16 .. 23  */
+	66, 66, 66, 66, 66, 66, 66, 66, /*  24 .. 31  */
+	66, 66, 66, 66, 66, 66, 66, 66, /*  32 .. 39  */
+	66, 66, 66, 62, 66, 66, 66, 63, /*  40 .. 47  */
+	52, 53, 54, 55, 56, 57, 58, 59, /*  48 .. 55  */
+	60, 61, 66, 66, 66, 65, 66, 66, /*  56 .. 63  */
+	66,  0,  1,  2,  3,  4,  5,  6, /*  64 .. 71  */
+	 7,  8,  9, 10, 11, 12, 13, 14, /*  72 .. 79  */
+	15, 16, 17, 18, 19, 20, 21, 22, /*  80 .. 87  */
+	23, 24, 25, 66, 66, 66, 66, 66, /*  88 .. 95  */
+	66, 26, 27, 28, 29, 30, 31, 32, /*  96 .. 103 */
+	33, 34, 35, 36, 37, 38, 39, 40, /* 104 .. 111 */
+	41, 42, 43, 44, 45, 46, 47, 48, /* 112 .. 119 */
+	49, 50, 51, 66, 66, 66, 66, 66, /* 120 .. 127 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 128 .. 135 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 136 .. 143 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 144 .. 151 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 152 .. 159 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 160 .. 167 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 168 .. 175 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 176 .. 183 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 184 .. 191 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 192 .. 199 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 200 .. 207 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 208 .. 215 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 216 .. 223 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 224 .. 231 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 232 .. 239 */
+	66, 66, 66, 66, 66, 66, 66, 66, /* 240 .. 247 */
+	66, 66, 66, 66, 66, 66, 66, 66  /* 248 .. 255 */
+};
+
+
+static gchar six_bits_to_char[65] = 
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+
+/* Returns the class for a CamelStreamB64 */
+#define CSB64_CLASS(so) CAMEL_STREAM_B64_CLASS (GTK_OBJECT(so)->klass)
+
+static void           init_with_input_stream__static         (CamelStreamB64 *stream_b64, 
+							       CamelStream *input_stream);
+
+static gint           read__static                           (CamelStream *stream, 
+							       gchar *buffer, 
+							       gint n);
+
+static gint           read_decode__static                    (CamelStream *stream, 
+							       gchar *buffer, 
+							       gint n);
+static gboolean       eos__static                            (CamelStream *stream);
+
+static void
+camel_stream_b64_class_init (CamelStreamB64Class *camel_stream_b64_class)
+{
+	CamelStreamClass *camel_stream_class = CAMEL_STREAM_CLASS (camel_stream_b64_class);
+
+
+	parent_class = gtk_type_class (camel_stream_get_type ());
+
+	/* virtual method definition */
+	camel_stream_b64_class->init_with_input_stream = init_with_input_stream__static;
+
+
+	/* virtual method overload */
+	camel_stream_class->read = read__static;
+	camel_stream_class->eos = eos__static; 
+
+	/* signal definition */
+	
+}
+
+GtkType
+camel_stream_b64_get_type (void)
+{
+	static GtkType camel_stream_b64_type = 0;
+	
+	if (!camel_stream_b64_type)	{
+		GtkTypeInfo camel_stream_b64_info =	
+		{
+			"CamelStreamB64",
+			sizeof (CamelStreamB64),
+			sizeof (CamelStreamB64Class),
+			(GtkClassInitFunc) camel_stream_b64_class_init,
+			(GtkObjectInitFunc) NULL,
+				/* reserved_1 */ NULL,
+				/* reserved_2 */ NULL,
+			(GtkClassInitFunc) NULL,
+		};
+		
+		camel_stream_b64_type = gtk_type_unique (camel_stream_get_type (), &camel_stream_b64_info);
+	}
+	
+	return camel_stream_b64_type;
+}
+
+
+static void
+reemit_available_signal__static (CamelStream *parent_stream, gpointer user_data)
+{
+	gtk_signal_emit_by_name (GTK_OBJECT (user_data), "data_available");
+}
+
+static void           
+init_with_input_stream__static (CamelStreamB64 *stream_b64, 
+				 CamelStream *input_stream)
+{
+	g_assert (stream_b64);
+	g_assert (input_stream);
+
+
+
+	/* by default, the stream is in decode mode */	
+	stream_b64->mode = CAMEL_STREAM_B64_DECODER;
+
+	stream_b64->eos = FALSE;
+	stream_b64->decode_status.keep = 0;
+	stream_b64->decode_status.state = 0;
+	
+
+	stream_b64->input_stream = input_stream;
+	
+	gtk_object_ref (GTK_OBJECT (input_stream));
+	
+	/* 
+	 *  connect to the parent stream "data_available"
+	 *  stream so that we can reemit the signal on the 
+	 *  seekable substream in case some data would 
+	 *  be available for us 
+	 */
+	gtk_signal_connect (GTK_OBJECT (input_stream),
+			    "data_available", 
+			    reemit_available_signal__static,
+			    stream_b64);
+	
+	
+	/* bootstrapping signal */
+	gtk_signal_emit_by_name (GTK_OBJECT (stream_b64), "data_available");
+
+
+}
+
+
+
+CamelStream *
+camel_stream_b64_new_with_input_stream (CamelStream *input_stream)
+{
+	CamelStreamB64 *stream_b64;
+	
+	stream_b64 = gtk_type_new (camel_stream_b64_get_type ());
+	CSB64_CLASS (stream_b64)->init_with_input_stream (stream_b64, input_stream);
+
+	return CAMEL_STREAM (stream_b64);
+}
+
+
+
+
+void       
+camel_stream_b64_set_mode (CamelStreamB64 *stream_b64,
+			   CamelStreamB64Mode mode)
+{
+	g_assert (stream_b64);
+	stream_b64->mode = mode;
+}
+
+
+
+
+static gint 
+read__static (CamelStream *stream, 
+	      gchar *buffer, 
+	      gint n)
+{
+	CamelStreamB64 *stream_b64 = CAMEL_STREAM_B64 (stream);
+	
+	g_assert (stream);
+        
+
+	if (stream_b64->mode == CAMEL_STREAM_B64_DECODER)
+		return read_decode__static (stream, buffer, n);
+	
+	return 0;
+}
+
+
+
+static gint read_decode__static (CamelStream *stream, 
+				  gchar *buffer, 
+				  gint n)
+{
+	CamelStreamB64 *stream_b64 = CAMEL_STREAM_B64 (stream);
+	CamelStream64DecodeStatus *status;
+	CamelStream    *input_stream;
+	guchar six_bits_value;
+	gint nb_read_in_input;
+	guchar c;
+	gint j = 0;
+	
+	g_assert (stream);
+	input_stream = stream_b64->input_stream;
+
+	g_assert (input_stream);
+	status = &(stream_b64->decode_status);
+	
+	
+	/* state = (CamelStream64DecodeState *)
+	   ((gchar *)stream_b64  + G_STRUCT_OFFSET (CamelStreamB64, decode_state)) */
+	
+	nb_read_in_input = camel_stream_read (input_stream, &c, 1);
+	
+	while ((nb_read_in_input >0 ) && (j<n)) {
+		
+		six_bits_value = char_to_six_bits[c];
+		
+		/* if we encounter an '=' we can assume the end of the stream 
+		   has been found */
+		if (six_bits_value == 65) {
+			stream_b64->eos = TRUE;
+			break;
+		}
+		
+		/* test if we must ignore the character */
+		if (six_bits_value != 66) {
+			
+			switch (status->state % 4){
+			case 0:
+				status->keep =  six_bits_value << 2;
+				break;
+			case 1:
+				buffer [j++] = status->keep | (six_bits_value >> 4);
+				status->keep = (six_bits_value & 0xf) << 4;
+				break;
+			case 2:
+				buffer [j++] = status->keep | (six_bits_value >> 2);
+				status->keep = (six_bits_value & 0x3) << 6;
+				break;
+			case 3:
+				buffer [j++] = status->keep | six_bits_value;
+				break;
+			}
+			
+			status->state = (status->state + 1) % 4;
+		}
+		
+		
+		nb_read_in_input = camel_stream_read (input_stream, &c, 1);
+		
+	}
+	
+	return j;
+	
+}
+
+
+
+
+
+
+	
+static gboolean
+eos__static (CamelStream *stream)
+{
+	CamelStreamB64 *stream_b64 = CAMEL_STREAM_B64 (stream);
+	
+	g_assert (stream);
+	g_assert (stream_b64->input_stream);
+
+	return (stream_b64->eos || camel_stream_eos (stream_b64->input_stream));
+}