305 lines
6.2 KiB
C
305 lines
6.2 KiB
C
/* $Header: /src/pub/tcsh/tc.nls.c,v 3.6 2005/02/15 21:09:02 christos Exp $ */
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/*
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* tc.nls.c: NLS handling
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*/
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/*-
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* Copyright (c) 1980, 1991 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "sh.h"
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RCSID("$Id: tc.nls.c,v 3.6 2005/02/15 21:09:02 christos Exp $")
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#ifdef SHORT_STRINGS
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int
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NLSWidth(c)
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NLSChar c;
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{
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# ifdef HAVE_WCWIDTH
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int l;
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if (c & NLS_ILLEGAL)
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return 1;
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l = wcwidth(c);
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return l >= 0 ? l : 0;
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# else
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return c != 0;
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# endif
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}
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#endif
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#if defined (WIDE_STRINGS) || !defined (SHORT_STRINGS)
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Char *
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NLSChangeCase(Char *p, int mode)
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{
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Char c, *op = p, *n, c2 = 0;
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for (; (c = *p) != 0; p++) {
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if (mode == 0 && Islower(c)) {
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c2 = Toupper(c);
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break;
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} else if (mode && Isupper(c)) {
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c2 = Tolower(c);
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break;
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}
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}
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if (!*p)
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return 0;
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n = Strsave(op);
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n[p - op] = c2;
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return n;
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}
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int
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NLSExtend(Char *from, int max, int num)
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{
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(void)from;
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num = abs (num);
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if (num > max)
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num = max;
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return num;
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}
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#endif
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#ifdef WIDE_STRINGS
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int
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NLSStringWidth(Char *s)
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{
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int w = 0;
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while (*s)
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w += wcwidth(*s++);
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return w;
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}
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#elif defined (SHORT_STRINGS)
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int
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NLSFrom(const Char *p, size_t l, NLSChar *cp)
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{
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size_t i;
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int len;
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wchar_t c;
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char b[MB_LEN_MAX];
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if (l == NLSZEROT) {
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for (i = 0; i < MB_CUR_MAX && *p; i++)
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b[i] = p[i] & CHAR;
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} else {
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for (i = 0; i < MB_CUR_MAX && i < l; i++)
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b[i] = p[i] & CHAR;
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}
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mbtowc(0, 0, 0);
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len = rt_mbtowc(&c, b, i);
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if (len <= 0) {
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if (cp)
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*cp = *p ? *p | NLS_ILLEGAL : 0;
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return 1;
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}
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if (cp)
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*cp = (int)c;
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return len;
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}
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int
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NLSFinished(Char *p, size_t l, eChar extra)
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{
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size_t i, r;
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wchar_t c;
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char b[MB_LEN_MAX + 1], back[MB_LEN_MAX];
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mbstate_t state;
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for (i = 0; i < MB_CUR_MAX && i < l; i++)
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b[i] = p[i];
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if (extra != CHAR_ERR)
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b[i++] = extra;
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memset(&state, 0, sizeof(state));
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r = mbrtowc((wchar_t *)&c, b, i, (mbstate_t *)&state);
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if (r == (size_t)-2)
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return 0;
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if (r == (size_t)-1 || (size_t)wctomb(back, c) != r ||
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memcmp(b, back, r) != 0)
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return -1;
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return r == i ? 1 : 2;
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}
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int
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NLSChars(Char *s)
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{
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int l;
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for (l = 0; *s; l++)
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s += NLSSize(s, -1);
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return l;
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}
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int
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NLSStringWidth(Char *s)
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{
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int w = 0;
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NLSChar c;
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while (*s) {
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s += NLSFrom(s, NLSZEROT, &c);
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w += NLSWidth(c);
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}
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return w;
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}
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int
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NLSTo(Char *p, NLSChar c)
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{
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char b[MB_LEN_MAX];
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int i, j;
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if (c & NLS_ILLEGAL) {
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if (p)
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*p = c;
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return 1;
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}
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i = wctomb(b, (wchar_t)c);
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if (i == -1)
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return 0;
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if (p)
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for (j = 0; j < i; j++)
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p[j] = b[j];
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return i;
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}
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int
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NLSExtend(Char *from, int max, int num)
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{
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int l, n, i;
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Char *p;
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if (num == 0)
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return 0;
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if (num > 0) {
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n = 0;
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while (num > 0 && max > 0) {
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l = NLSSize(from, max);
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n += l;
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from += l;
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max -= l;
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num--;
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}
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return n;
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}
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from -= max;
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p = from;
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i = max;
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n = 0;
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while (i > 0) {
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l = NLSSize(p, i);
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p += l;
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i -= l;
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n++;
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}
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if (n >= -num)
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n += num;
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else
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n = 0;
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i = max;
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while (n > 0) {
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l = NLSSize(from, max);
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from += l;
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max -= l;
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i -= l;
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n--;
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}
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return i;
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}
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void
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NLSQuote(Char *cp)
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{
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int l;
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while (*cp) {
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l = NLSSize(cp, -1);
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cp++;
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while (l-- > 1)
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*cp++ |= QUOTE;
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}
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}
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Char *
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NLSChangeCase(Char *p, int mode)
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{
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Char *n, *op = p;
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NLSChar c, c2 = 0;
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int l, l2;
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while (*p) {
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l = NLSFrom(p, NLSZEROT, &c);
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if (mode == 0 && iswlower((wint_t)c)) {
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c2 = (int)towupper((wint_t)c);
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break;
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} else if (mode && iswupper((wint_t)c)) {
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c2 = (int)towlower((wint_t)c);
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break;
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}
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p += l;
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}
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if (!*p)
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return 0;
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l2 = NLSTo((Char *)0, c2);
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n = (Char *)xmalloc((size_t)((op - p + l2 + Strlen(p + l) + 1) * sizeof(Char)));
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if (p != op)
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memcpy(n, op, (p - op) * sizeof(Char));
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NLSTo(n + (p - op), c2);
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memcpy(n + (p - op + l2), p + l, (Strlen(p + l) + 1) * sizeof(Char));
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return n;
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}
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#endif
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int
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NLSClassify(c, nocomb)
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NLSChar c;
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int nocomb;
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{
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int w;
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if (c & NLS_ILLEGAL)
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return NLSCLASS_ILLEGAL;
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w = NLSWidth(c);
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if (w > 0 || (Iswprint(c) && !nocomb))
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return w;
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if (Iswcntrl(c) && c < 0x100) {
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if (c == '\n')
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return NLSCLASS_NL;
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if (c == '\t')
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return NLSCLASS_TAB;
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#ifndef ASCII
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if (!Isupper(_toebcdic[_toascii[c]|0100]) && !strchr("@[\\]^_", _toebcdic[_toascii[c]|0100]))
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return NLSCLASS_ILLEGAL;
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#endif
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return NLSCLASS_CTRL;
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}
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if (c >= 0x1000000)
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return NLSCLASS_ILLEGAL4;
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if (c >= 0x10000)
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return NLSCLASS_ILLEGAL3;
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if (c >= 0x100)
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return NLSCLASS_ILLEGAL2;
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return NLSCLASS_ILLEGAL;
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}
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