Initial import of Sylpheed (GTK2 version).

git-svn-id: svn://sylpheed.sraoss.jp/sylpheed/trunk@1 ee746299-78ed-0310-b773-934348b2243d

1 files changed, 168 insertions, 0 deletions

diff --git a/src/base64.c b/src/base64.c
new file mode 100644
index 00000000..484cd286
--- /dev/null
+++ b/src/base64.c
@@ -0,0 +1,168 @@
+/*
+ * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
+ * Copyright (C) 1999-2002 Hiroyuki Yamamoto
+ *
+ * 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 <glib.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "base64.h"
+
+static const gchar base64char[64] =
+	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+static const gchar base64val[128] = {
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
+	52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
+	-1,  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, -1, -1, -1, -1, -1,
+	-1, 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, -1, -1, -1, -1, -1
+};
+
+#define BASE64VAL(c)	(isascii((guchar)c) ? base64val[(gint)(c)] : -1)
+
+void base64_encode(gchar *out, const guchar *in, gint inlen)
+{
+	const guchar *inp = in;
+	gchar *outp = out;
+
+	while (inlen >= 3) {
+		*outp++ = base64char[(inp[0] >> 2) & 0x3f];
+		*outp++ = base64char[((inp[0] & 0x03) << 4) |
+				     ((inp[1] >> 4) & 0x0f)];
+		*outp++ = base64char[((inp[1] & 0x0f) << 2) |
+				     ((inp[2] >> 6) & 0x03)];
+		*outp++ = base64char[inp[2] & 0x3f];
+
+		inp += 3;
+		inlen -= 3;
+	}
+
+	if (inlen > 0) {
+		*outp++ = base64char[(inp[0] >> 2) & 0x3f];
+		if (inlen == 1) {
+			*outp++ = base64char[(inp[0] & 0x03) << 4];
+			*outp++ = '=';
+		} else {
+			*outp++ = base64char[((inp[0] & 0x03) << 4) |
+					     ((inp[1] >> 4) & 0x0f)];
+			*outp++ = base64char[((inp[1] & 0x0f) << 2)];
+		}
+		*outp++ = '=';
+	}
+
+	*outp = '\0';
+}
+
+gint base64_decode(guchar *out, const gchar *in, gint inlen)
+{
+	const gchar *inp = in;
+	guchar *outp = out;
+	gchar buf[4];
+
+	if (inlen < 0)
+		inlen = G_MAXINT;
+
+	while (inlen >= 4 && *inp != '\0') {
+		buf[0] = *inp++;
+		inlen--;
+		if (BASE64VAL(buf[0]) == -1) break;
+
+		buf[1] = *inp++;
+		inlen--;
+		if (BASE64VAL(buf[1]) == -1) break;
+
+		buf[2] = *inp++;
+		inlen--;
+		if (buf[2] != '=' && BASE64VAL(buf[2]) == -1) break;
+
+		buf[3] = *inp++;
+		inlen--;
+		if (buf[3] != '=' && BASE64VAL(buf[3]) == -1) break;
+
+		*outp++ = ((BASE64VAL(buf[0]) << 2) & 0xfc) |
+			  ((BASE64VAL(buf[1]) >> 4) & 0x03);
+		if (buf[2] != '=') {
+			*outp++ = ((BASE64VAL(buf[1]) & 0x0f) << 4) |
+				  ((BASE64VAL(buf[2]) >> 2) & 0x0f);
+			if (buf[3] != '=') {
+				*outp++ = ((BASE64VAL(buf[2]) & 0x03) << 6) |
+					   (BASE64VAL(buf[3]) & 0x3f);
+			}
+		}
+	}
+
+	return outp - out;
+}
+
+Base64Decoder *base64_decoder_new(void)
+{
+	Base64Decoder *decoder;
+
+	decoder = g_new0(Base64Decoder, 1);
+	return decoder;
+}
+
+void base64_decoder_free(Base64Decoder *decoder)
+{
+	g_free(decoder);
+}
+
+gint base64_decoder_decode(Base64Decoder *decoder,
+			   const gchar *in, guchar *out)
+{
+	gint len, total_len = 0;
+	gint buf_len;
+	gchar buf[4];
+
+	g_return_val_if_fail(decoder != NULL, -1);
+	g_return_val_if_fail(in != NULL, -1);
+	g_return_val_if_fail(out != NULL, -1);
+
+	buf_len = decoder->buf_len;
+	memcpy(buf, decoder->buf, sizeof(buf));
+
+	for (;;) {
+		while (buf_len < 4) {
+			gchar c = *in;
+
+			in++;
+			if (c == '\0') break;
+			if (c == '\r' || c == '\n') continue;
+			if (c != '=' && BASE64VAL(c) == -1)
+				return -1;
+			buf[buf_len++] = c;
+		}
+		if (buf_len < 4 || buf[0] == '=' || buf[1] == '=') {
+			decoder->buf_len = buf_len;
+			memcpy(decoder->buf, buf, sizeof(buf));
+			return total_len;
+		}
+		len = base64_decode(out, buf, 4);
+		out += len;
+		total_len += len;
+		buf_len = 0;
+		if (len < 3) {
+			decoder->buf_len = 0;
+			return total_len;
+		}
+	}
+}