Initial commit for sylpheed 3.7.0

1 files changed, 168 insertions, 0 deletions

diff --git a/libsylph/base64.c b/libsylph/base64.c
new file mode 100644
index 0000000..2e54da7
--- /dev/null
+++ b/libsylph/base64.c
@@ -0,0 +1,168 @@
+/*
+ * LibSylph -- E-Mail client library
+ * Copyright (C) 1999-2005 Hiroyuki Yamamoto
+ *
+ * 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 <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;
+                }
+        }
+}