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-rw-r--r--contrib/idn/idnkit-1.0-src/lib/race.c427
1 files changed, 427 insertions, 0 deletions
diff --git a/contrib/idn/idnkit-1.0-src/lib/race.c b/contrib/idn/idnkit-1.0-src/lib/race.c
new file mode 100644
index 00000000..1b44a989
--- /dev/null
+++ b/contrib/idn/idnkit-1.0-src/lib/race.c
@@ -0,0 +1,427 @@
+#ifndef lint
+static char *rcsid = "$Id: race.c,v 1.1.1.1 2003/06/04 00:26:07 marka Exp $";
+#endif
+
+/*
+ * Copyright (c) 2000,2001,2002 Japan Network Information Center.
+ * All rights reserved.
+ *
+ * By using this file, you agree to the terms and conditions set forth bellow.
+ *
+ * LICENSE TERMS AND CONDITIONS
+ *
+ * The following License Terms and Conditions apply, unless a different
+ * license is obtained from Japan Network Information Center ("JPNIC"),
+ * a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda,
+ * Chiyoda-ku, Tokyo 101-0047, Japan.
+ *
+ * 1. Use, Modification and Redistribution (including distribution of any
+ * modified or derived work) in source and/or binary forms is permitted
+ * under this License Terms and Conditions.
+ *
+ * 2. Redistribution of source code must retain the copyright notices as they
+ * appear in each source code file, this License Terms and Conditions.
+ *
+ * 3. Redistribution in binary form must reproduce the Copyright Notice,
+ * this License Terms and Conditions, in the documentation and/or other
+ * materials provided with the distribution. For the purposes of binary
+ * distribution the "Copyright Notice" refers to the following language:
+ * "Copyright (c) 2000-2002 Japan Network Information Center. All rights reserved."
+ *
+ * 4. The name of JPNIC may not be used to endorse or promote products
+ * derived from this Software without specific prior written approval of
+ * JPNIC.
+ *
+ * 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JPNIC BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <config.h>
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <idn/result.h>
+#include <idn/assert.h>
+#include <idn/logmacro.h>
+#include <idn/converter.h>
+#include <idn/ucs4.h>
+#include <idn/debug.h>
+#include <idn/race.h>
+#include <idn/util.h>
+
+#ifndef IDN_RACE_PREFIX
+#define IDN_RACE_PREFIX "bq--"
+#endif
+#define RACE_2OCTET_MODE 0xd8
+#define RACE_ESCAPE 0xff
+#define RACE_ESCAPE_2ND 0x99
+
+#define RACE_BUF_SIZE 128 /* more than enough */
+
+/*
+ * Unicode surrogate pair.
+ */
+#define IS_SURROGATE_HIGH(v) (0xd800 <= (v) && (v) <= 0xdbff)
+#define IS_SURROGATE_LOW(v) (0xdc00 <= (v) && (v) <= 0xdfff)
+#define SURROGATE_HIGH(v) (SURROGATE_H_OFF + (((v) - 0x10000) >> 10))
+#define SURROGATE_LOW(v) (SURROGATE_L_OFF + ((v) & 0x3ff))
+#define SURROGATE_BASE 0x10000
+#define SURROGATE_H_OFF 0xd800
+#define SURROGATE_L_OFF 0xdc00
+#define COMBINE_SURROGATE(h, l) \
+ (SURROGATE_BASE + (((h)-SURROGATE_H_OFF)<<10) + ((l)-SURROGATE_L_OFF))
+
+/*
+ * Compression type.
+ */
+enum {
+ compress_one, /* all characters are in a single row */
+ compress_two, /* row 0 and another row */
+ compress_none /* nope */
+};
+
+static idn_result_t race_decode_decompress(const char *from,
+ unsigned short *buf,
+ size_t buflen);
+static idn_result_t race_compress_encode(const unsigned short *p,
+ int compress_mode,
+ char *to, size_t tolen);
+static int get_compress_mode(unsigned short *p);
+
+idn_result_t
+idn__race_decode(idn_converter_t ctx, void *privdata,
+ const char *from, unsigned long *to, size_t tolen) {
+ unsigned short *buf = NULL;
+ size_t prefixlen = strlen(IDN_RACE_PREFIX);
+ size_t fromlen;
+ size_t buflen;
+ idn_result_t r;
+
+ assert(ctx != NULL);
+
+ TRACE(("idn__race_decode(from=\"%s\", tolen=%d)\n",
+ idn__debug_xstring(from, 50), (int)tolen));
+
+ if (!idn__util_asciihaveaceprefix(from, IDN_RACE_PREFIX)) {
+ if (*from == '\0') {
+ r = idn_ucs4_utf8toucs4(from, to, tolen);
+ goto ret;
+ }
+ r = idn_invalid_encoding;
+ goto ret;
+ }
+ from += prefixlen;
+ fromlen = strlen(from);
+
+ /*
+ * Allocate sufficient buffer.
+ */
+ buflen = fromlen + 1;
+ buf = malloc(sizeof(*buf) * buflen);
+ if (buf == NULL) {
+ r = idn_nomemory;
+ goto ret;
+ }
+
+ /*
+ * Decode base32 and decompress.
+ */
+ r = race_decode_decompress(from, buf, buflen);
+ if (r != idn_success)
+ goto ret;
+
+ /*
+ * Now 'buf' points the decompressed string, which must contain
+ * UTF-16 characters.
+ */
+
+ /*
+ * Convert to UCS4.
+ */
+ r = idn_ucs4_utf16toucs4(buf, to, tolen);
+ if (r != idn_success)
+ goto ret;
+
+ret:
+ free(buf);
+ if (r == idn_success) {
+ TRACE(("idn__race_decode(): succcess (to=\"%s\")\n",
+ idn__debug_ucs4xstring(to, 50)));
+ } else {
+ TRACE(("idn__race_decode(): %s\n", idn_result_tostring(r)));
+ }
+ return (r);
+}
+
+static idn_result_t
+race_decode_decompress(const char *from, unsigned short *buf, size_t buflen)
+{
+ unsigned short *p = buf;
+ unsigned int bitbuf = 0;
+ int bitlen = 0;
+ int i, j;
+ size_t len;
+
+ while (*from != '\0') {
+ int c = *from++;
+ int x;
+
+ if ('a' <= c && c <= 'z')
+ x = c - 'a';
+ else if ('A' <= c && c <= 'Z')
+ x = c - 'A';
+ else if ('2' <= c && c <= '7')
+ x = c - '2' + 26;
+ else
+ return (idn_invalid_encoding);
+
+ bitbuf = (bitbuf << 5) + x;
+ bitlen += 5;
+ if (bitlen >= 8) {
+ *p++ = (bitbuf >> (bitlen - 8)) & 0xff;
+ bitlen -= 8;
+ }
+ }
+ len = p - buf;
+
+ /*
+ * Now 'buf' holds the decoded string.
+ */
+
+ /*
+ * Decompress.
+ */
+ if (buf[0] == RACE_2OCTET_MODE) {
+ if ((len - 1) % 2 != 0)
+ return (idn_invalid_encoding);
+ for (i = 1, j = 0; i < len; i += 2, j++)
+ buf[j] = (buf[i] << 8) + buf[i + 1];
+ len = j;
+ } else {
+ unsigned short c = buf[0] << 8; /* higher octet */
+
+ for (i = 1, j = 0; i < len; j++) {
+ if (buf[i] == RACE_ESCAPE) {
+ if (i + 1 >= len)
+ return (idn_invalid_encoding);
+ else if (buf[i + 1] == RACE_ESCAPE_2ND)
+ buf[j] = c | 0xff;
+ else
+ buf[j] = buf[i + 1];
+ i += 2;
+
+ } else if (buf[i] == 0x99 && c == 0x00) {
+ /*
+ * The RACE specification says this is error.
+ */
+ return (idn_invalid_encoding);
+
+ } else {
+ buf[j] = c | buf[i++];
+ }
+ }
+ len = j;
+ }
+ buf[len] = '\0';
+
+ return (idn_success);
+}
+
+idn_result_t
+idn__race_encode(idn_converter_t ctx, void *privdata,
+ const unsigned long *from, char *to, size_t tolen) {
+ char *to_org = to;
+ unsigned short *p, *buf = NULL;
+ size_t prefixlen = strlen(IDN_RACE_PREFIX);
+ size_t buflen;
+ size_t fromlen;
+ idn_result_t r;
+ int compress_mode;
+
+ assert(ctx != NULL);
+
+ TRACE(("idn__race_encode(from=\"%s\", tolen=%d)\n",
+ idn__debug_ucs4xstring(from, 50), (int)tolen));
+
+ if (*from == '\0') {
+ r = idn_ucs4_ucs4toutf8(from, to, tolen);
+ goto ret;
+ } else if (idn__util_ucs4haveaceprefix(from, IDN_RACE_PREFIX)) {
+ r = idn_prohibited;
+ goto ret;
+ }
+
+ if (tolen < prefixlen) {
+ r = idn_buffer_overflow;
+ goto ret;
+ }
+ memcpy(to, IDN_RACE_PREFIX, prefixlen);
+ to += prefixlen;
+ tolen -= prefixlen;
+
+ fromlen = idn_ucs4_strlen(from);
+ buflen = fromlen * 2 + 2;
+
+ /*
+ * Convert to UTF-16.
+ * Preserve space for a character at the top of the buffer.
+ */
+ for (;;) {
+ unsigned short *new_buf;
+
+ new_buf = realloc(buf, sizeof(*buf) * buflen);
+ if (new_buf == NULL) {
+ r = idn_nomemory;
+ goto ret;
+ }
+ buf = new_buf;
+
+ r = idn_ucs4_ucs4toutf16(from, buf + 1, buflen - 1);
+ if (r == idn_success)
+ break;
+ else if (r != idn_buffer_overflow)
+ goto ret;
+
+ buflen = fromlen * 2 + 2;
+ }
+ p = buf + 1;
+
+ /*
+ * Now 'p' contains UTF-16 encoded string.
+ */
+
+ /*
+ * Check U+0099.
+ * RACE doesn't permit U+0099 in an input string.
+ */
+ for (p = buf + 1; *p != '\0'; p++) {
+ if (*p == 0x0099) {
+ r = idn_invalid_encoding;
+ goto ret;
+ }
+ }
+
+ /*
+ * Compress, encode in base-32 and output.
+ */
+ compress_mode = get_compress_mode(buf + 1);
+ r = race_compress_encode(buf, compress_mode, to, tolen);
+
+ret:
+ free(buf);
+ if (r == idn_success) {
+ TRACE(("idn__race_encode(): succcess (to=\"%s\")\n",
+ idn__debug_xstring(to_org, 50)));
+ } else {
+ TRACE(("idn__race_encode(): %s\n", idn_result_tostring(r)));
+ }
+ return (r);
+}
+
+static idn_result_t
+race_compress_encode(const unsigned short *p, int compress_mode,
+ char *to, size_t tolen)
+{
+ unsigned long bitbuf = *p++; /* bit stream buffer */
+ int bitlen = 8; /* # of bits in 'bitbuf' */
+
+ while (*p != '\0' || bitlen > 0) {
+ unsigned int c = *p;
+
+ if (c == '\0') {
+ /* End of data. Flush. */
+ bitbuf <<= (5 - bitlen);
+ bitlen = 5;
+ } else if (compress_mode == compress_none) {
+ /* Push 16 bit data. */
+ bitbuf = (bitbuf << 16) | c;
+ bitlen += 16;
+ p++;
+ } else {/* compress_mode == compress_one/compress_two */
+ /* Push 8 or 16 bit data. */
+ if (compress_mode == compress_two &&
+ (c & 0xff00) == 0) {
+ /* Upper octet is zero (and not U1). */
+ bitbuf = (bitbuf << 16) | 0xff00 | c;
+ bitlen += 16;
+ } else if ((c & 0xff) == 0xff) {
+ /* Lower octet is 0xff. */
+ bitbuf = (bitbuf << 16) |
+ (RACE_ESCAPE << 8) | RACE_ESCAPE_2ND;
+ bitlen += 16;
+ } else {
+ /* Just output lower octet. */
+ bitbuf = (bitbuf << 8) | (c & 0xff);
+ bitlen += 8;
+ }
+ p++;
+ }
+
+ /*
+ * Output bits in 'bitbuf' in 5-bit unit.
+ */
+ while (bitlen >= 5) {
+ int x;
+
+ /* Get top 5 bits. */
+ x = (bitbuf >> (bitlen - 5)) & 0x1f;
+ bitlen -= 5;
+
+ /* Encode. */
+ if (x < 26)
+ x += 'a';
+ else
+ x = (x - 26) + '2';
+
+ if (tolen < 1)
+ return (idn_buffer_overflow);
+
+ *to++ = x;
+ tolen--;
+ }
+ }
+
+ if (tolen <= 0)
+ return (idn_buffer_overflow);
+
+ *to = '\0';
+ return (idn_success);
+}
+
+static int
+get_compress_mode(unsigned short *p) {
+ int zero = 0;
+ unsigned int upper = 0;
+ unsigned short *modepos = p - 1;
+
+ while (*p != '\0') {
+ unsigned int hi = *p++ & 0xff00;
+
+ if (hi == 0) {
+ zero++;
+ } else if (hi == upper) {
+ ;
+ } else if (upper == 0) {
+ upper = hi;
+ } else {
+ *modepos = RACE_2OCTET_MODE;
+ return (compress_none);
+ }
+ }
+ *modepos = upper >> 8;
+ if (upper > 0 && zero > 0)
+ return (compress_two);
+ else
+ return (compress_one);
+}
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