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/***
*strrev.c - reverse a string in place
*
* Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _strrev() - reverse a string in place (not including
* '\0' character)
*
*Revision History:
* 02-27-90 GJF Fixed calling type, #include <cruntime.h>, fixed
* copyright.
* 10-02-90 GJF New-style function declarator.
* 01-18-91 GJF ANSI naming.
*
*******************************************************************************/
#include <cruntime.h>
#include <string.h>
/***
*char *_strrev(string) - reverse a string in place
*
*Purpose:
* Reverses the order of characters in the string. The terminating
* null character remains in place.
*
*Entry:
* char *string - string to reverse
*
*Exit:
* returns string - now with reversed characters
*
*Exceptions:
*
*******************************************************************************/
char * _CALLTYPE1 _strrev (
char * string
)
{
char *start = string;
char *left = string;
char ch;
while (*string++) /* find end of string */
;
string -= 2;
while (left < string)
{
ch = *left;
*left++ = *string;
*string-- = ch;
}
return(start);
}
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