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530 lines
13 KiB
C
530 lines
13 KiB
C
/*
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* Unicode string manipulation functions
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*
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* Copyright 2000 Alexandre Julliard
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*
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* This 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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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include "wine/unicode.h"
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int strcmpiW( const WCHAR *str1, const WCHAR *str2 )
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{
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for (;;)
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{
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int ret = tolowerW(*str1) - tolowerW(*str2);
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if (ret || !*str1) return ret;
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str1++;
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str2++;
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}
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}
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int strncmpiW( const WCHAR *str1, const WCHAR *str2, int n )
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{
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int ret = 0;
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for ( ; n > 0; n--, str1++, str2++)
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if ((ret = tolowerW(*str1) - tolowerW(*str2)) || !*str1) break;
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return ret;
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}
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int memicmpW( const WCHAR *str1, const WCHAR *str2, int n )
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{
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int ret = 0;
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for ( ; n > 0; n--, str1++, str2++)
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if ((ret = tolowerW(*str1) - tolowerW(*str2))) break;
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return ret;
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}
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WCHAR *strstrW( const WCHAR *str, const WCHAR *sub )
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{
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while (*str)
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{
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const WCHAR *p1 = str, *p2 = sub;
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while (*p1 && *p2 && *p1 == *p2) { p1++; p2++; }
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if (!*p2) return (WCHAR *)str;
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str++;
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}
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return NULL;
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}
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/* strtolW and strtoulW implementation based on the GNU C library code */
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/* Copyright (C) 1991,92,94,95,96,97,98,99,2000,2001 Free Software Foundation, Inc. */
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long int strtolW( const WCHAR *nptr, WCHAR **endptr, int base )
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{
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int negative;
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register unsigned long int cutoff;
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register unsigned int cutlim;
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register unsigned long int i;
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register const WCHAR *s;
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register WCHAR c;
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const WCHAR *save, *end;
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int overflow;
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if (base < 0 || base == 1 || base > 36) return 0;
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save = s = nptr;
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/* Skip white space. */
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while (isspaceW (*s))
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++s;
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if (!*s) goto noconv;
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/* Check for a sign. */
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negative = 0;
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if (*s == '-')
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{
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negative = 1;
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++s;
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}
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else if (*s == '+')
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++s;
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/* Recognize number prefix and if BASE is zero, figure it out ourselves. */
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if (*s == '0')
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{
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if ((base == 0 || base == 16) && toupperW(s[1]) == 'X')
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{
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s += 2;
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base = 16;
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}
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else if (base == 0)
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base = 8;
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}
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else if (base == 0)
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base = 10;
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/* Save the pointer so we can check later if anything happened. */
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save = s;
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end = NULL;
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cutoff = ULONG_MAX / (unsigned long int) base;
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cutlim = ULONG_MAX % (unsigned long int) base;
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overflow = 0;
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i = 0;
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c = *s;
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for (;c != '\0'; c = *++s)
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{
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if (s == end)
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break;
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if (c >= '0' && c <= '9')
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c -= '0';
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else if (isalphaW (c))
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c = toupperW (c) - 'A' + 10;
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else
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break;
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if ((int) c >= base)
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break;
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/* Check for overflow. */
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if (i > cutoff || (i == cutoff && c > cutlim))
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overflow = 1;
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else
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{
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i *= (unsigned long int) base;
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i += c;
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}
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}
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/* Check if anything actually happened. */
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if (s == save)
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goto noconv;
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/* Store in ENDPTR the address of one character
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past the last character we converted. */
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if (endptr != NULL)
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*endptr = (WCHAR *)s;
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/* Check for a value that is within the range of
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`unsigned LONG int', but outside the range of `LONG int'. */
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if (overflow == 0
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&& i > (negative
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? -((unsigned long int) (LONG_MIN + 1)) + 1
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: (unsigned long int) LONG_MAX))
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overflow = 1;
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if (overflow)
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{
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errno = ERANGE;
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return negative ? LONG_MIN : LONG_MAX;
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}
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/* Return the result of the appropriate sign. */
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return negative ? -i : i;
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noconv:
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/* We must handle a special case here: the base is 0 or 16 and the
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first two characters are '0' and 'x', but the rest are not
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hexadecimal digits. This is no error case. We return 0 and
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ENDPTR points to the `x`. */
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if (endptr != NULL)
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{
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if (save - nptr >= 2 && toupperW (save[-1]) == 'X'
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&& save[-2] == '0')
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*endptr = (WCHAR *)&save[-1];
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else
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/* There was no number to convert. */
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*endptr = (WCHAR *)nptr;
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}
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return 0L;
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}
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unsigned long int strtoulW( const WCHAR *nptr, WCHAR **endptr, int base )
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{
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int negative;
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register unsigned long int cutoff;
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register unsigned int cutlim;
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register unsigned long int i;
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register const WCHAR *s;
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register WCHAR c;
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const WCHAR *save, *end;
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int overflow;
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if (base < 0 || base == 1 || base > 36) return 0;
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save = s = nptr;
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/* Skip white space. */
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while (isspaceW (*s))
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++s;
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if (!*s) goto noconv;
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/* Check for a sign. */
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negative = 0;
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if (*s == '-')
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{
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negative = 1;
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++s;
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}
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else if (*s == '+')
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++s;
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/* Recognize number prefix and if BASE is zero, figure it out ourselves. */
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if (*s == '0')
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{
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if ((base == 0 || base == 16) && toupperW(s[1]) == 'X')
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{
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s += 2;
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base = 16;
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}
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else if (base == 0)
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base = 8;
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}
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else if (base == 0)
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base = 10;
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/* Save the pointer so we can check later if anything happened. */
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save = s;
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end = NULL;
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cutoff = ULONG_MAX / (unsigned long int) base;
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cutlim = ULONG_MAX % (unsigned long int) base;
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overflow = 0;
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i = 0;
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c = *s;
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for (;c != '\0'; c = *++s)
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{
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if (s == end)
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break;
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if (c >= '0' && c <= '9')
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c -= '0';
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else if (isalphaW (c))
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c = toupperW (c) - 'A' + 10;
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else
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break;
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if ((int) c >= base)
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break;
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/* Check for overflow. */
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if (i > cutoff || (i == cutoff && c > cutlim))
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overflow = 1;
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else
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{
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i *= (unsigned long int) base;
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i += c;
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}
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}
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/* Check if anything actually happened. */
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if (s == save)
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goto noconv;
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/* Store in ENDPTR the address of one character
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past the last character we converted. */
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if (endptr != NULL)
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*endptr = (WCHAR *)s;
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if (overflow)
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{
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errno = ERANGE;
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return ULONG_MAX;
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}
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/* Return the result of the appropriate sign. */
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return negative ? -i : i;
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noconv:
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/* We must handle a special case here: the base is 0 or 16 and the
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first two characters are '0' and 'x', but the rest are not
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hexadecimal digits. This is no error case. We return 0 and
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ENDPTR points to the `x`. */
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if (endptr != NULL)
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{
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if (save - nptr >= 2 && toupperW (save[-1]) == 'X'
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&& save[-2] == '0')
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*endptr = (WCHAR *)&save[-1];
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else
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/* There was no number to convert. */
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*endptr = (WCHAR *)nptr;
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}
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return 0L;
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}
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/* format a WCHAR string according to a printf format; helper for vsnprintfW */
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static size_t format_string( WCHAR *buffer, size_t len, const char *format, const WCHAR *str, int str_len )
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{
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size_t count = 0;
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int i, left_align = 0, width = 0, max = 0;
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assert( *format == '%' );
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format++; /* skip '%' */
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while (*format == '0' || *format == '+' || *format == '-' || *format == ' ' || *format == '#')
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{
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if (*format == '-') left_align = 1;
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format++;
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}
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while (isdigit(*format)) width = width * 10 + *format++ - '0';
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if (str_len == -1) str_len = strlenW( str );
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if (*format == '.')
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{
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format++;
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while (isdigit(*format)) max = max * 10 + *format++ - '0';
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if (max > str_len) max = str_len;
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}
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else max = str_len;
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if (*format == 'h' || *format == 'l') format++;
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assert( *format == 's' );
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if (!left_align && width > max)
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{
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for (i = 0; i < width - max; i++)
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{
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if (count++ < len)
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*buffer++ = ' ';
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}
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}
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if (count < len)
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memcpy( buffer, str, min( max, len - count ) * sizeof(WCHAR) );
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count += max;
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buffer += max;
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if (left_align && width > max)
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{
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for (i = 0; i < width - max; i++)
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{
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if (count++ < len)
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*buffer++ = ' ';
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}
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}
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return count;
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}
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int vsnprintfW(WCHAR *str, size_t len, const WCHAR *format, va_list valist)
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{
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unsigned int written = 0;
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const WCHAR *iter = format;
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char bufa[512], fmtbufa[64], *fmta;
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while (*iter)
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{
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while (*iter && *iter != '%')
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{
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if (written++ < len)
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*str++ = *iter;
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iter++;
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}
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if (*iter == '%')
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{
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if (iter[1] == '%')
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{
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if (written++ < len)
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*str++ = '%'; /* "%%"->'%' */
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iter += 2;
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continue;
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}
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fmta = fmtbufa;
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*fmta++ = *iter++;
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while (*iter == '0' ||
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*iter == '+' ||
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*iter == '-' ||
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*iter == ' ' ||
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*iter == '*' ||
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*iter == '#')
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{
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if (*iter == '*')
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{
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char *buffiter = bufa;
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int fieldlen = va_arg(valist, int);
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sprintf(buffiter, "%d", fieldlen);
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while (*buffiter)
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*fmta++ = *buffiter++;
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}
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else
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*fmta++ = *iter;
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iter++;
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}
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while (isdigit(*iter))
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*fmta++ = *iter++;
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if (*iter == '.')
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{
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*fmta++ = *iter++;
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if (*iter == '*')
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{
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char *buffiter = bufa;
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int fieldlen = va_arg(valist, int);
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sprintf(buffiter, "%d", fieldlen);
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while (*buffiter)
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*fmta++ = *buffiter++;
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iter++;
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}
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else
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while (isdigit(*iter))
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*fmta++ = *iter++;
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}
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if (*iter == 'h' || *iter == 'l')
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*fmta++ = *iter++;
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switch (*iter)
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{
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case 's':
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{
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static const WCHAR none[] = { '(','n','u','l','l',')',0 };
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const WCHAR *wstr = va_arg(valist, const WCHAR *);
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size_t remaining = written < len ? len - written : 0;
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size_t count;
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*fmta++ = 's';
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*fmta = 0;
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count = format_string( str, remaining, fmtbufa, wstr ? wstr : none, -1 );
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str += min( count, remaining );
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written += count;
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iter++;
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break;
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}
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case 'c':
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{
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WCHAR wstr;
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size_t remaining = written < len ? len - written : 0;
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size_t count;
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wstr = va_arg(valist, int);
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*fmta++ = 's';
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*fmta = 0;
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count = format_string( str, remaining, fmtbufa, &wstr, 1 );
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str += min( count, remaining );
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written += count;
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iter++;
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break;
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}
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default:
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{
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/* For non wc types, use system sprintf and append to wide char output */
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/* FIXME: for unrecognised types, should ignore % when printing */
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char *bufaiter = bufa;
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if (*iter == 'p')
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sprintf(bufaiter, "%0*lX", 2 * (int)sizeof(void*),
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(unsigned long)va_arg(valist, void *));
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else
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{
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*fmta++ = *iter;
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*fmta = '\0';
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if (*iter == 'a' || *iter == 'A' ||
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*iter == 'e' || *iter == 'E' ||
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*iter == 'f' || *iter == 'F' ||
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*iter == 'g' || *iter == 'G')
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sprintf(bufaiter, fmtbufa, va_arg(valist, double));
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else
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{
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/* FIXME: On 32 bit systems this doesn't handle int 64's. */
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sprintf(bufaiter, fmtbufa, va_arg(valist, void *));
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}
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}
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while (*bufaiter)
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{
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if (written++ < len)
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*str++ = *bufaiter;
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bufaiter++;
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}
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iter++;
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break;
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}
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}
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}
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}
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if (len)
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{
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if (written >= len)
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str--;
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*str++ = 0;
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}
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/* FIXME: POSIX [v]snprintf() returns the equivalent of written, not -1, on short buffer. */
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return written < len ? (int)written : -1;
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}
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int vsprintfW( WCHAR *str, const WCHAR *format, va_list valist )
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{
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return vsnprintfW( str, INT_MAX, format, valist );
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}
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int snprintfW( WCHAR *str, size_t len, const WCHAR *format, ...)
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{
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int retval;
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va_list valist;
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va_start(valist, format);
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retval = vsnprintfW(str, len, format, valist);
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va_end(valist);
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return retval;
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}
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int sprintfW( WCHAR *str, const WCHAR *format, ...)
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{
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int retval;
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va_list valist;
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va_start(valist, format);
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retval = vsnprintfW(str, INT_MAX, format, valist);
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va_end(valist);
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return retval;
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}
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