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#ifndef lint
static char *rcsid = "$Id: utf5.c,v 1.11 2001/10/31 08:51:29 m-kasahr Exp $";
#endif
/*
* Copyright (c) 2000 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) Japan Network Information Center. All rights reserved."
*
* 4. Neither the name of JPNIC may 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.
*
* 6. Indemnification by Licensee
* Any person or entities using and/or redistributing this Software under
* this License Terms and Conditions shall defend indemnify and hold
* harmless JPNIC from and against any and all judgements damages,
* expenses, settlement liabilities, cost and other liabilities of any
* kind as a result of use and redistribution of this Software or any
* claim, suite, action, litigation or proceeding by any third party
* arising out of or relates to this License Terms and Conditions.
*
* 7. Governing Law, Jurisdiction and Venue
* This License Terms and Conditions shall be governed by and and
* construed in accordance with the law of Japan. Any person or entities
* using and/or redistributing this Software under this License Terms and
* Conditions hereby agrees and consent to the personal and exclusive
* jurisdiction and venue of Tokyo District Court of Japan.
*/
#include <config.h>
#include <stddef.h>
#include <mdn/assert.h>
#include <mdn/logmacro.h>
#include <mdn/utf5.h>
#include <mdn/debug.h>
int
mdn_utf5_getwc(const char *s, size_t len, unsigned long *vp) {
int top = 1;
size_t orglen = len;
unsigned long v = 0;
assert(s != NULL && len >= 0 && vp != NULL);
#if 0
TRACE(("mdn_utf5_getwc(s=<%s>,len=%d)\n",
mdn_debug_hexstring(s, 10), len));
#endif
if (len == 0)
return (0);
/* Special case for domain name handling. */
if (*s == '.') {
*vp = '.';
return (1);
}
while (len > 0) {
int c = *s++;
if (top) {
if ('G' <= c && c <= 'V')
v = c - 'G';
else if ('g' <= c && c <= 'v')
v = c - 'g';
else
return (0);
top = 0;
} else {
if ('0' <= c && c <= '9')
v = (v << 4) + (c - '0');
else if ('A' <= c && c <= 'F')
v = (v << 4) + (c - 'A' + 10);
else if ('a' <= c && c <= 'f')
v = (v << 4) + (c - 'a' + 10);
else
break;
}
len--;
}
*vp = v;
return (orglen - len);
}
int
mdn_utf5_putwc(char *s, size_t len, unsigned long v) {
int w;
int off;
assert(s != NULL);
#if 0
TRACE(("mdn_utf5_putwc(v=%lx)\n", v));
#endif
/* Special handling for domain delimiter '.' */
if (v == '.') {
if (len < 1)
return (0);
*s = v;
return (1);
}
if (v < 0x10) {
w = 1;
} else if (v < 0x100) {
w = 2;
} else if (v < 0x1000) {
w = 3;
} else if (v < 0x10000) {
w = 4;
} else if (v < 0x100000) {
w = 5;
} else if (v < 0x1000000) {
w = 6;
} else if (v < 0x10000000) {
w = 7;
} else if (v < 0x80000000) {
w = 8;
} else {
return (0);
}
if (len < w)
return (0);
off = (w - 1) * 4;
*s++ = 'G' + ((v >> off) & 0xf);
off -= 4;
while (off >= 0) {
int x = (v >> off) & 0xf;
if (x < 10)
*s++ = '0' + x;
else
*s++ = 'A' + x - 10;
off -= 4;
}
return (w);
}
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