addstr.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 75 行

/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
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*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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*    provided with the Original Code and Modifications, and is also
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* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
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****************************************************************************/


#include <stdio.h>
#include <string.h>

#include "vi.h"

/*
 * AddString2 - free a string, then allocate new one
 */
void AddString2( char **where, char *str )
{

    MemFree( *where );
    AddString( where, str );

} /* AddString2 */

/*
 * AddString - allocate a string, and copy it in
 */
void AddString( char **where, char *str )
{
    int sl;

    if( str == NULL )  {
        sl = 1;
    } else {
        sl = strlen( str ) + 1;
    }

    *where = MemAlloc( sl );

    if( str != NULL ) {
        memcpy( *where, str, sl );
    }

} /* AddString */

void DeleteString( char **string )
{
    MemFree( *string );
    *string = NULL;
}