strrtrim函数by gipsysoft，顺请Jackzhu拿分

[SoftDIY]

帖一个函数，用起来方便一点：
strrtrim

删除字符串后的空格

char *strrtrim( char *szText );

Return value

The return value is a pointer to the start of the string. The same pointer passed into the function.

用法

char szBuf[] = "test ";
strrtrim( szBuf );
// szBuf now contains the text "test"

函数源码

/*----------------------------------------------------------------------
Copyright (c) 1998,1999 Gipsysoft. All Rights Reserved.
File: strrttrim.cpp
Owner: [e-mail]
Web site: http://www.gipsysoft.com
Purpose: strip off any trailing whitespace.
----------------------------------------------------------------------*/
#include "stdafx.h"
#ifndef _INC_CTYPE
#include <ctype.h>
#endif // _INC_CTYPE

extern char * strrtrim( char * pszString );

char * strrtrim( char * pszString )
{
//
// We will only right trim a string if it is not null and it has at least one character
if( pszString && *pszString )
{
//
// Move to the end of the string, as we go check to see if the string is all spaces
// if it is then we record this fact - later we just set the first character to be zero.
char * pszEnd = pszString;
bool bAllSpace = true;
while( *pszEnd )
{
if( bAllSpace && !isspace( *pszEnd ) )
bAllSpace = false;
pszEnd++;
}

if( bAllSpace )
{
*pszString = '\000';
}
else
{
pszEnd--;

//
// Now loop backwards over the string until we get to a non-space character.
// As we go set each space to be zero, this zero terminates
while( ( isspace( *pszEnd ) ) && pszEnd >= pszString )
{
*pszEnd-- = '\000';
}
}
}

return pszString;
}

[Jackzhu]

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