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8215c9ecf2
* include/bits/wchar2.h: New file. * wcsmbs/wchar.h: Include <bits/wchar2.h> if fortification is requested. * wcsmbs/wcsncpy.c: Add __wcsncpy alias. * string/bits/string3.h: Add fortified stpncpy definitions. * sysdeps/generic/stpncpy_chk.c: New file. * libio/vswprintf.c: Move _IO_wstrnfile definition to strfile.h. Export _IO_wstrn_jumps. * libio/strfile.h: Define _IO_wstrnfile and declare _IO_wstrn_jumps. * include/wchar.h: Declare __wcsncpy and __vswprintf_chk. * debug/fgetws_chk.c: New file. * debug/fgetws_u_chk.c: New file. * debug/fwprintf_chk.c: New file. * debug/swprintf_chk.c: New file. * debug/vfwprintf_chk.c: New file. * debug/vswprintf_chk.c: New file. * debug/vwprintf_chk.c: New file. * debug/wcpcpy_chk.c: New file. * debug/wcpncpy_chk.c: New file. * debug/wcscat_chk.c: New file. * debug/wcscpy_chk.c: New file. * debug/wcsncat_chk.c: New file. * debug/wcsncpy_chk.c: New file. * debug/wmemcpy_chk.c: New file. * debug/wmemmove_chk.c: New file. * debug/wmempcpy_chk.c: New file. * debug/wmemset_chk.c: New file. * debug/wprintf_chk.c: New file. * debug/tst-chk1.c: Add tests for new functions. * debug/Versions: Export new functions. * debug/Makefile (routines): Add new functions.
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
/* Copyright (C) 1993,1995,1996,1997,2002,2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* This is almost copied from strncpy.c, written by Torbjorn Granlund. */
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#include <string.h>
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/* Copy no more than N characters of SRC to DEST, returning the address of
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the terminating '\0' in DEST, if any, or else DEST + N. */
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char *
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__stpncpy_chk (char *dest, const char *src, size_t n, size_t destlen)
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{
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char c;
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char *s = dest;
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if (__builtin_expect (destlen < n, 0))
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__chk_fail ();
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if (n >= 4)
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{
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size_t n4 = n >> 2;
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for (;;)
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{
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c = *src++;
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*dest++ = c;
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if (c == '\0')
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break;
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c = *src++;
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*dest++ = c;
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if (c == '\0')
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break;
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c = *src++;
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*dest++ = c;
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if (c == '\0')
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break;
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c = *src++;
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*dest++ = c;
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if (c == '\0')
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break;
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if (--n4 == 0)
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goto last_chars;
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}
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n -= dest - s;
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goto zero_fill;
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}
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last_chars:
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n &= 3;
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if (n == 0)
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return dest;
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for (;;)
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{
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c = *src++;
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--n;
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*dest++ = c;
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if (c == '\0')
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break;
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if (n == 0)
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return dest;
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}
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zero_fill:
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while (n-- > 0)
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dest[n] = '\0';
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return dest - 1;
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}
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