import code

1 files changed, 291 insertions, 0 deletions

diff --git a/jni/iodine/src/base128.c b/jni/iodine/src/base128.c
new file mode 100644
index 0000000..32a29f8
--- /dev/null
+++ b/jni/iodine/src/base128.c
@@ -0,0 +1,291 @@
+/*
+ * Copyright (C) 2009 J.A.Bezemer@opensourcepartners.nl
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * raw	76543210 76543210 76543210 76543210 76543210 76543210 76543210
+ * enc	65432106 54321065 43210654 32106543 21065432 10654321 06543210
+ *	^      ^       ^       ^       ^       ^       ^       ^
+ *
+ *	0001 1  0001 1
+ *	0011 3  0011 3
+ *	0111 7  0111 7
+ *	1111 f  0110 6
+ *	1110 e  0100 4
+ *	1100 c
+ *	1000 8
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "encoding.h"
+#include "base128.h"
+
+#define BLKSIZE_RAW 7
+#define BLKSIZE_ENC 8
+
+/* Don't use '-' (restricted to middle of labels), prefer iso_8859-1
+ * accent chars since they might readily be entered in normal use,
+ * don't use 254-255 because of possible function overloading in DNS systems.
+ */
+static const unsigned char cb128[] = 
+	"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	"\274\275\276\277"
+	"\300\301\302\303\304\305\306\307\310\311\312\313\314\315\316\317"
+	"\320\321\322\323\324\325\326\327\330\331\332\333\334\335\336\337"
+	"\340\341\342\343\344\345\346\347\350\351\352\353\354\355\356\357"
+	"\360\361\362\363\364\365\366\367\370\371\372\373\374\375";
+static unsigned char rev128[256];
+static int reverse_init = 0;
+
+static int base128_encode(char *, size_t *, const void *, size_t);
+static int base128_decode(void *, size_t *, const char *, size_t);
+static int base128_handles_dots();
+static int base128_blksize_raw();
+static int base128_blksize_enc();
+
+static struct encoder base128_encoder =
+{
+	"Base128",
+	base128_encode,
+	base128_decode,
+	base128_handles_dots,
+	base128_handles_dots,
+	base128_blksize_raw,
+	base128_blksize_enc
+};
+
+struct encoder
+*get_base128_encoder()
+{
+	return &base128_encoder;
+}
+
+static int 
+base128_handles_dots()
+{
+	return 0;
+}
+
+static int 
+base128_blksize_raw()
+{
+	return BLKSIZE_RAW;
+}
+
+static int 
+base128_blksize_enc()
+{
+	return BLKSIZE_ENC;
+}
+
+inline static void
+base128_reverse_init()
+{
+	int i;
+	unsigned char c;
+
+	if (!reverse_init) {
+		memset (rev128, 0, 256);
+		for (i = 0; i < 128; i++) {
+			c = cb128[i];
+			rev128[(int) c] = i;
+		}
+		reverse_init = 1;
+	}
+}
+
+static int 
+base128_encode(char *buf, size_t *buflen, const void *data, size_t size)
+/*
+ * Fills *buf with max. *buflen characters, encoding size bytes of *data.
+ *
+ * NOTE: *buf space should be at least 1 byte _more_ than *buflen
+ * to hold the trailing '\0'.
+ *
+ * return value    : #bytes filled in buf   (excluding \0)
+ * sets *buflen to : #bytes encoded from data
+ */
+{
+	unsigned char *ubuf = (unsigned char *) buf;
+	unsigned char *udata = (unsigned char *) data;
+	int iout = 0;	/* to-be-filled output char */
+	int iin = 0;	/* one more than last input byte that can be
+			   successfully decoded */
+
+	/* Note: Don't bother to optimize manually. GCC optimizes
+	   better(!) when using simplistic array indexing. */
+
+	while (1) {
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[((udata[iin] & 0xfe) >> 1)];
+		iout++;
+
+		if (iout >= *buflen || iin >= size) {
+			iout--; 	/* previous char is useless */
+			break;
+		}
+		ubuf[iout] = cb128[((udata[iin] & 0x01) << 6) |
+				   ((iin + 1 < size) ?
+				    ((udata[iin + 1] & 0xfc) >> 2) : 0)];
+		iin++;			/* 0 complete, iin=1 */
+		iout++;
+
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[((udata[iin] & 0x03) << 5) |
+				   ((iin + 1 < size) ?
+				    ((udata[iin + 1] & 0xf8) >> 3) : 0)];
+		iin++;			/* 1 complete, iin=2 */
+		iout++;
+
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[((udata[iin] & 0x07) << 4) |
+				   ((iin + 1 < size) ?
+				    ((udata[iin + 1] & 0xf0) >> 4) : 0)];
+		iin++;			/* 2 complete, iin=3 */
+		iout++;
+
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[((udata[iin] & 0x0f) << 3) |
+				   ((iin + 1 < size) ?
+				    ((udata[iin + 1] & 0xe0) >> 5) : 0)];
+		iin++;			/* 3 complete, iin=4 */
+		iout++;
+
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[((udata[iin] & 0x1f) << 2) |
+				   ((iin + 1 < size) ?
+				    ((udata[iin + 1] & 0xc0) >> 6) : 0)];
+		iin++;			/* 4 complete, iin=5 */
+		iout++;
+
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[((udata[iin] & 0x3f) << 1) |
+				   ((iin + 1 < size) ?
+				    ((udata[iin + 1] & 0x80) >> 7) : 0)];
+		iin++;			/* 5 complete, iin=6 */
+		iout++;
+
+		if (iout >= *buflen || iin >= size)
+			break;
+		ubuf[iout] = cb128[(udata[iin] & 0x7f)];
+		iin++;			/* 6 complete, iin=7 */
+		iout++;
+	}
+
+	ubuf[iout] = '\0';
+
+	/* store number of bytes from data that was used */
+	*buflen = iin;
+
+	return iout;
+}
+
+#define REV128(x) rev128[(int) (x)]
+
+static int
+base128_decode(void *buf, size_t *buflen, const char *str, size_t slen)
+/*
+ * Fills *buf with max. *buflen bytes, decoded from slen chars in *str.
+ * Decoding stops early when *str contains \0.
+ * Illegal encoded chars are assumed to decode to zero.
+ *
+ * NOTE: *buf space should be at least 1 byte _more_ than *buflen
+ * to hold a trailing '\0' that is added (though *buf will usually
+ * contain full-binary data).
+ *
+ * return value    : #bytes filled in buf   (excluding \0)
+ */
+{
+	unsigned char *ustr = (unsigned char *) str;
+	unsigned char *ubuf = (unsigned char *) buf;
+	int iout = 0;	/* to-be-filled output byte */
+	int iin = 0;	/* next input char to use in decoding */
+
+	base128_reverse_init ();
+
+	/* Note: Don't bother to optimize manually. GCC optimizes
+	   better(!) when using simplistic array indexing. */
+
+	while (1) {
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x7f) << 1) | 
+			     ((REV128(ustr[iin + 1]) & 0x40) >> 6);
+		iin++;  		/* 0 used up, iin=1 */
+		iout++;
+
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x3f) << 2) |
+			     ((REV128(ustr[iin + 1]) & 0x60) >> 5);
+		iin++;  		/* 1 used up, iin=2 */
+		iout++;
+
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x1f) << 3) |
+			     ((REV128(ustr[iin + 1]) & 0x70) >> 4);
+		iin++;  		/* 2 used up, iin=3 */
+		iout++;
+
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x0f) << 4) |
+			     ((REV128(ustr[iin + 1]) & 0x78) >> 3);
+		iin++;  		/* 3 used up, iin=4 */
+		iout++;
+
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x07) << 5) |
+			     ((REV128(ustr[iin + 1]) & 0x7c) >> 2);
+		iin++;  		/* 4 used up, iin=5 */
+		iout++;
+
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x03) << 6) |
+			     ((REV128(ustr[iin + 1]) & 0x7e) >> 1);
+		iin++;  		/* 5 used up, iin=6 */
+		iout++;
+
+		if (iout >= *buflen || iin + 1 >= slen ||
+		    str[iin] == '\0' || str[iin + 1] == '\0')
+			break;
+		ubuf[iout] = ((REV128(ustr[iin]) & 0x01) << 7) |
+			     ((REV128(ustr[iin + 1]) & 0x7f));
+		iin += 2;  		/* 6,7 used up, iin=8 */
+		iout++;
+	}
+
+	ubuf[iout] = '\0';
+
+	return iout;
+}