183 lines
3.5 KiB
C
183 lines
3.5 KiB
C
/*
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wcs.c - Wide character handling functions
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Copyright (C) 1999, 2000 Petr Vandrovec
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Revision history:
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1.00 1999, November 20 Petr Vandrovec <vandrove@vc.cvut.cz>
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Created from nwnet.c
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1.01 2000, February 7 Petr Vandrovec <vandrove@vc.cvut.cz>
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Added wcsrev().
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1.02 2001, May 31 Petr Vandrovec <vandrove@vc.cvut.cz>
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Add include stdlib.h (needed for wcsdup).
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*/
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#include "config.h"
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#include "nwnet_i.h"
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#include <stdlib.h>
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#ifndef HAVE_WCSCPY
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/* Do it yourself... Move into specific file?! */
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/* we can pass NULL into this procedure */
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wchar_t* wcscpy(wchar_t* dst, const wchar_t* src) {
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wchar_t* tmp = dst;
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while ((*dst++ = *src++) != 0) ;
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return tmp;
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}
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#endif /* !HAVE_WCSCPY */
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#ifndef HAVE_WCSCMP
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int wcscmp(const wchar_t* s1, const wchar_t* s2) {
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wint_t c1;
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wint_t c2;
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do {
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c1 = *s1++;
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c2 = *s2++;
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if (!c1)
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break;
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} while (c1 == c2);
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if (c1 < c2)
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return -1; /* negative */
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return c1 - c2; /* zero or positive */
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}
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#endif /* !HAVE_WCSCMP */
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#ifndef HAVE_WCSNCMP
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int wcsncmp(const wchar_t* s1, const wchar_t* s2, size_t n) {
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wint_t c1;
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wint_t c2;
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if (!n)
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return 0;
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do {
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int diff;
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c1 = *s1++;
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c2 = *s2++;
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if (!c1)
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break;
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} while ((c1 == c2) && --n);
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if (c1 < c2)
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return -1;
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return c1 - c2;
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}
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#endif /* !HAVE_WCSNCMP */
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#ifndef HAVE_WCSCASECMP
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int wcscasecmp(const wchar_t* s1, const wchar_t* s2) {
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wint_t c1;
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wint_t c2;
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do {
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int diff;
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c1 = *s1++;
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c2 = *s2++;
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if (!c1)
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break;
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diff = c1 - c2;
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if (diff) {
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if ((c1 >= L'A') && (c1 <= L'Z'))
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c1 += 0x20;
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if ((c2 >= L'A') && (c2 <= L'Z'))
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c2 += 0x20;
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if (c1 != c2) {
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break;
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}
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}
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} while (1);
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if (c1 < c2)
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return -1;
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return c1 - c2;
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}
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#endif /* !HAVE_WCSCASECMP */
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#ifndef HAVE_WCSNCASECMP
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int wcsncasecmp(const wchar_t* s1, const wchar_t* s2, size_t n) {
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wint_t c1;
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wint_t c2;
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if (!n)
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return 0;
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do {
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int diff;
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c1 = *s1++;
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c2 = *s2++;
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if (!c1)
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break;
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diff = c1 - c2;
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if (diff) {
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if ((c1 >= L'A') && (c1 <= L'Z'))
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c1 += 0x20;
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if ((c2 >= L'A') && (c2 <= L'Z'))
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c2 += 0x20;
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if (c1 != c2) {
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break;
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}
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}
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} while (--n);
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if (c1 < c2)
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return -1;
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return c1 - c2;
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}
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#endif /* !HAVE_WCSNCASECMP */
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#ifndef HAVE_WCSLEN
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size_t wcslen(const wchar_t* x) {
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const wchar_t* start = x;
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if (x)
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while (*x) x++;
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return x - start;
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}
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#endif /* !HAVE_WCSLEN */
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#ifndef HAVE_WCSDUP
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/* NULL on input -> NULL on output */
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wchar_t* wcsdup(const wchar_t* x) {
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size_t l;
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wchar_t* ret;
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if (!x) return NULL;
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l = (wcslen(x) + 1) * sizeof(wchar_t);
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ret = (wchar_t*)malloc(l);
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if (ret)
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memcpy(ret, x, l);
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return ret;
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}
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#endif /* !HAVE_WCSDUP */
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#ifndef HAVE_WCSREV
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wchar_t* wcsrev(wchar_t* x) {
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wchar_t* bottom;
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wchar_t* top;
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bottom = x;
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top = x + wcslen(x) - 1;
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while (bottom < top) {
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wchar_t tmp;
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tmp = *bottom;
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*bottom++ = *top;
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*top-- = tmp;
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}
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return x;
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}
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#endif
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