523 lines
13 KiB
C
523 lines
13 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* 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 these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: CvString.c /main/4 1996/08/30 15:28:00 cde-hp $ */
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/************************************<+>*************************************
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****************************************************************************
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**
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** File: CvString.c
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**
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** Project: Cde DtHelp
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**
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** Description: Semi private string functions - can be platform dependent.
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** These routines are straight C code. They do not require
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** includes to know about the Canvas Engine, the Help
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** dialogs or anything else.
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**
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**
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** (c) Copyright 1987, 1988, 1989, 1990, 1991, 1992 Hewlett-Packard Company
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**
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** (c) Copyright 1993, 1994 Hewlett-Packard Company
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** (c) Copyright 1993, 1994 International Business Machines Corp.
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** (c) Copyright 1993, 1994 Sun Microsystems, Inc.
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** (c) Copyright 1993, 1994 Novell, Inc.
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**
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**
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**
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****************************************************************************
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************************************<+>*************************************/
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/*
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* system includes
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*/
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#include <stdlib.h>
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#include <string.h>
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/*
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* private includes
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*/
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#include "CvStringI.h"
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/******************************************************************************
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*
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* Private variables and defines.
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*
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*****************************************************************************/
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#define REALLOC_INCR 10
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/******************************************************************************
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*
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* Semi Public Functions
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*
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*****************************************************************************/
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/******************************************************************************
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* Function: _DtCvStrLen (const void *p1, int type)
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*
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* Paramenters:
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* p1 Specifies the string or wide char array to process.
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* type Specifies the type p1 is. 0 indicaates a string.
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* non-zero indicates a wide char array.
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* Returns:
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* >= 0 If p1 is non-null.
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* -1 If p1 is null.
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*
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* Purpose:
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* Returns in number of characters in p1.
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*
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*****************************************************************************/
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int
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_DtCvStrLen (
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const void *p1,
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int type )
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{
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int len = 0;
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const wchar_t *wcs;
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if (0 == type)
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return (strlen((const char *) p1));
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wcs = (wchar_t *) p1;
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while (0 != *wcs)
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{
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wcs++;
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len++;
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}
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return len;
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}
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/******************************************************************************
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* Function: _DtCvStrPtr (const void *p1, int type, int count)
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*
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* Paramenters:
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* p1 Specifies the string or wide char array to process.
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* type Specifies the type p1 is. 0 indicaates a string.
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* non-zero indicates a wide char array.
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* count Specifies an index into p1.
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* Returns:
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* ptr If everything works okay.
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* NULL If problems.
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*
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* Purpose:
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* Get to a point in the wide character or char string.
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*
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*****************************************************************************/
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void *
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_DtCvStrPtr (
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const void *p1,
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int type,
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int count)
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{
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if (0 == type)
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return ((void *) (((char *) p1) + count));
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return ((void *) (((wchar_t *) p1) + count));
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}
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/******************************************************************************
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* Function: _DtCvChar (const void *p1, int type, int count)
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*
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* Paramenters:
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* p1 Specifies the string or wide char array to process.
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* type Specifies the type p1 is. 0 indicaates a string.
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* non-zero indicates a wide char array.
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* count Specifies an index into p1.
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* Returns:
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* value If everything works okay.
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* (wchar_t) -1 If problems.
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*
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* Purpose:
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* Get a character value.
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*
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*****************************************************************************/
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wchar_t
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_DtCvChar (
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const void *p1,
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int type,
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int count)
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{
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wchar_t value = (wchar_t) -1;
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if (0 == type)
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value = *(((char *) p1) + count);
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else
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value = *(((wchar_t *) p1) + count);
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return (value);
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}
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/******************************************************************************
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* Function: _DtCvStrcspn (const void *s1, const char *s2, type, &ret_len)
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*
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* Returns in 'ret_len' the length of the initial segment of string
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* s1 which consists entirely of characters not found in string s2.
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*
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* if type is 0, then s1 is a char* string.
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* if type is not 0, then s1 is a wchar_t* string.
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*
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* s2 cannot be more than 15 characters if looking a wide character
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* string in s1.
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*
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* Returns:
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* -1 If found an invalid character.
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* 0 If found a character in string s2
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* 1 If found the null byte character.
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* 2 s2 contained more than 15 characters, but found one of the
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* first fifteen characters in string s2.
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* 3 s2 contained more than 15 characters, and didn't find any
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* of the first fifteen characters in string s2.
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*****************************************************************************/
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int
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_DtCvStrcspn (
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const void *s1,
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const char *s2,
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int type,
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int *ret_len )
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{
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size_t num;
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wchar_t widec[16];
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const wchar_t *wcp;
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const wchar_t *wcp2;
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if (NULL == s1)
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{
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*ret_len = 0;
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return 0;
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}
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if ((0 == type && '\0' == *((char *) s1)) ||
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(0 != type && 0 == *((wchar_t *) s1)))
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{
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*ret_len = 0;
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return 1;
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}
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if (NULL == s2 || '\0' == *s2)
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{
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*ret_len = _DtCvStrLen (s1, type);
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return 1;
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}
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if (0 == type)
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{
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/*
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* no need to go through any hassle, just use the 3C function
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*/
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*ret_len = strcspn ((char *) s1, s2);
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if ('\0' == ((char *) s1)[*ret_len])
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return 1;
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return 0;
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}
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/*
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* convert the test string into a wide char array
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*/
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num = mbstowcs(widec, s2, 16);
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if ((size_t) -1 == num)
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return -1;
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/*
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* force a null termination of the array
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*/
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widec[15] = 0;
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/*
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* if greater than 15 characters were converted, set the flag to 2
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*/
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num = ((num > 15) ? 2 : 0);
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wcp = s1;
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while (0 != *wcp)
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{
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wcp2 = widec;
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while (0 != *wcp2)
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{
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if (*wcp2 == *wcp)
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{
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*ret_len = wcp - (wchar_t *) s1;
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return 0 + num;
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}
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wcp2++;
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}
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wcp++;
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}
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*ret_len = wcp - (wchar_t *) s1;
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return 1 + num;
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}
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/****************************************************************************
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* Function: void **_DtCvAddPtrToArray (void **array, void *ptr)
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*
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* Parameters: array A pointer to a NULL-terminated array
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* of pointers.
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* ptr The pointer which is to be added to
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* the end of the array.
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*
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* Returns: A pointer to the NULL-terminated array created
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* by adding 'ptr' to the end of 'array'.
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*
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* Purpose: Add a new element to a NULL-terminated array of pointers.
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* These are typed as "void *" so that they can be used with
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* pointers to any type of data.
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*
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****************************************************************************/
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void **
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_DtCvAddPtrToArray (
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void **array,
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void *ptr)
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{
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void **nextP = NULL;
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int numElements;
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/* If this is the first item for the array, malloc the array and set
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nextP to point to the first element. */
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if (array == NULL || *array == NULL) {
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array = (void **) malloc (REALLOC_INCR * sizeof (void *));
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nextP = array;
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}
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else {
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/* Find the NULL pointer at the end of the array. */
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numElements = 0;
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for (nextP = array; *nextP != NULL; nextP++)
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numElements++;
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/* The array always grows by chunks of size REALLOC_INCR. So see if
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it currently is an exact multiple of REALLOC_INCR size (remember to
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count the NULL pointer). If it is then it must be full, so realloc
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another chunk. Also remember to move 'nextP' because the array
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will probably move in memory. */
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if ((numElements + 1) % REALLOC_INCR == 0) {
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array = (void **) realloc (array,
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(numElements + 1 + REALLOC_INCR) * sizeof (void *));
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if (array)
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nextP = array + numElements;
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else
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nextP = NULL;
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}
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}
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if (nextP)
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{
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*nextP++ = ptr;
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*nextP = NULL;
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}
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return (array);
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}
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/******************************************************************************
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* Function: int _DtCvFreeArray (void **array)
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*
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* Parameters: array A pointer to the NULL-terminated
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* string array which is to be freed.
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*
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* Return Value: 0 if successful, -1 if a failure occurs
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*
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* Purpose: Free the memory used for a NULL-terminated string array.
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*
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******************************************************************************/
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int
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_DtCvFreeArray (void **array)
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{
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void **next;
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if (array == NULL)
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return -1;
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for (next = array; *next != NULL; next++)
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free (*next);
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free (array);
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return (0);
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}
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#if defined(_AIX)
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/*****************************************************************************
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* Function: _DtCvStrCaseCmp
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*
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* Parameters:
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*
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* Return Value:
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*
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* Purpose: IBM does not support the 'strcasecmp' routine. This takes it's
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* place.
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*****************************************************************************/
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int
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_DtCvStrCaseCmp (
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const char *s1,
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const char *s2)
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{
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int c1;
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int c2;
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int result = 0;
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if (s1 == s2) return 0;
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if (NULL == s1) return -1;
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if (NULL == s2) return 1;
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while (result == 0 && *s1 != '\0' && *s2 != '\0')
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{
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c1 = (unsigned char) *s1;
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c2 = (unsigned char) *s2;
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if (isupper(c1))
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c1 = _tolower(c1);
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if (isupper(c2))
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c2 = _tolower(c2);
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result = c1 - c2;
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s1++;
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s2++;
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}
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if (result == 0 && (*s1 != '\0' || *s2 != '\0'))
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{
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c1 = (unsigned char) *s1;
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c2 = (unsigned char) *s2;
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if (isupper(c1))
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c1 = _tolower(c1);
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if (isupper(c2))
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c2 = _tolower(c2);
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result = c1 - c2;
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}
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return result;
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}
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#endif /* _AIX */
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/*****************************************************************************
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* Function: _DtCvStrNCaseCmpLatin1()
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*
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* Purpose: Does not use the tolower() functions to determine the lower
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* case of a character. On some platforms, using tolower() on
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* the upper case of a typical Latin1 character does not match
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* it's Latin1 one lower case.
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*
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* This routine is to be used only when we want to map strict
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* Latin1 characters to it's lower case. I.e. when we -know-
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* the data is in English.
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*****************************************************************************/
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int
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_DtCvStrNCaseCmpLatin1 (
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const char *s1,
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const char *s2,
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size_t n)
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{
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int c1;
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int c2;
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int result = 0;
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if (s1 == s2 || n < 1) return 0;
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if (NULL == s1) return -1;
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if (NULL == s2) return 1;
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while (result == 0 && *s1 != '\0' && *s2 != '\0' && n > 0)
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{
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c1 = (unsigned char) *s1;
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c2 = (unsigned char) *s2;
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c1 = _DtCvToLower(c1);
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c2 = _DtCvToLower(c2);
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result = c1 - c2;
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s1++;
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s2++;
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n--;
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}
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if (result == 0 && n > 0 && (*s1 != '\0' || *s2 != '\0'))
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{
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c1 = (unsigned char) *s1;
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c2 = (unsigned char) *s2;
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c1 = _DtCvToLower(c1);
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c2 = _DtCvToLower(c2);
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result = c1 - c2;
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}
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return result;
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}
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/*****************************************************************************
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* Function: _DtCvStrCaseCmpLatin1
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*
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* Purpose: Does not use the tolower() functions to determine the lower
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* case of a character. On some platforms, using tolower() on
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* the upper case of a typical Latin1 character does not match
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* it's Latin1 one lower case.
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*
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* This routine is to be used only when we want to map strict
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* Latin1 characters to it's lower case. I.e. when we -know-
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* the data is in English.
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*****************************************************************************/
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int
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_DtCvStrCaseCmpLatin1 (
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const char *s1,
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const char *s2)
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{
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int c1;
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int c2;
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int result = 0;
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if (s1 == s2) return 0;
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if (NULL == s1) return -1;
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if (NULL == s2) return 1;
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while (result == 0 && *s1 != '\0' && *s2 != '\0')
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{
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c1 = (unsigned char) *s1;
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c2 = (unsigned char) *s2;
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c1 = _DtCvToLower(c1);
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c2 = _DtCvToLower(c2);
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result = c1 - c2;
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s1++;
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s2++;
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}
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if (result == 0 && (*s1 != '\0' || *s2 != '\0'))
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{
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c1 = (unsigned char) *s1;
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c2 = (unsigned char) *s2;
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c1 = _DtCvToLower(c1);
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c2 = _DtCvToLower(c2);
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result = c1 - c2;
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}
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return result;
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}
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