1 files changed, 98 insertions, 0 deletions
diff --git a/camel/gmime-base64.c b/camel/gmime-base64.c
new file mode 100644
index 0000000000..a9e596d2dc
--- /dev/null
+++ b/camel/gmime-base64.c
@@ -0,0 +1,98 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Base64 handlers
+ *
+ * Author:
+ *   Miguel de Icaza (miguel@kernel.org)
+ */
+#include <config.h>
+#include "gmime-base64.h"
+
+#define BSIZE 512
+
+/*
+ * 64-based alphabet used by the the Base64 enconding
+ */
+static char *base64_alphabet =
+"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/**
+ * gmime_encode_base64:
+ * @input: The data source to be encoded in base64 format
+ * @output: Where to put the encoded information in.
+ *
+ * This routine encodes the information pulled from @input using 
+ * base64 encoding and stores it on the @output CamelStream object
+ */
+void
+gmime_encode_base64 (CamelStream *input, CamelStream *output)
+{
+	char buffer [BSIZE];
+	char obuf [80];	/* Output is limited to 76 characters, rfc2045 */
+	int n, i, j, state;
+	long bytes;
+	
+	j = 0;
+	state = 0;
+	bytes = 0;
+	while ((n = camel_stream_read (input, &buffer, sizeof (buffer))) > 0){
+		int   keep = 0;
+		
+		for (i = 0; i < n; i++, state++, bytes++){
+			char c = buffer [i];
+			
+			switch (state % 3){
+			case 0:
+				obuf [j++] = base64_alphabet [c >> 2];
+				keep = (c & 3) << 4;
+				break;
+			case 1:
+				obuf [j++] = base64_alphabet [keep | (c >> 4)];
+				keep = (c & 0xf) << 4;
+				break;
+			case 2:
+				obuf [j++] = base64_alphabet [keep | (c >> 6)];
+				obuf [j++] = base64_alphabet [c & 0x3f];
+				break;
+			}
+			
+			if ((bytes % 72) == 0){
+				obuf [j++] = '\r';
+				obuf [j++] = '\n';
+				camel_stream_write (output, obuf, j);
+			}
+		}
+	}
+	switch (state % 3){
+	case 0:
+		/* full ouput, nothing left to do */
+		break;
+
+	case 1:
+		obuf [j++] = base64_alphabet [keep];
+		obuf [j++] = '=';
+		obuf [j++] = '=';
+		break;
+
+	case 2:
+		obuf [j++] = base64_alphabet [keep];
+		obuf [j++] = '=';
+		break;
+	}
+	camel_stream_write (output, obuf, j);
+	camel_stream_flush (output);
+}
+
+
+/**
+ * gmime_decode_base64:
+ * @input: A buffer in base64 format.
+ * @output: Destination where the decoded information is stored.
+ *
+ * This routine decodes the base64 information pulled from @input
+ * and stores it on the @output CamelStream object.
+ */
+void
+gmime_decode_base64 (CamelStream *input, CamelStream *output)
+{
+}