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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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src
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wperror.c
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C/C++ Source or Header
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1998-06-17
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/***
*wperror.c - print system error message (wchar_t version)
*
* Copyright (c) 1993-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines _wperror() - print wide system error message
* System error message are indexed by errno.
*
*******************************************************************************/
#include <cruntime.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syserr.h>
#include <mtdll.h>
#include <io.h>
#include <dbgint.h>
/***
*void _wperror(wmessage) - print system error message
*
*Purpose:
* prints user's error message, then follows it with ": ", then the system
* error message, then a newline. All output goes to stderr. If user's
* message is NULL or a null string, only the system error message is
* printer. If errno is weird, prints "Unknown error".
*
*Entry:
* const wchar_t *wmessage - users message to prefix system error message
*
*Exit:
* Prints message; no return value.
*
*Exceptions:
*
*******************************************************************************/
void __cdecl _wperror (
REG1 const wchar_t *wmessage
)
{
REG2 int fh = 2;
int size;
char *amessage;
/* convert WCS string into ASCII string */
size = wcslen(wmessage) + 1;
if (NULL == (amessage = (char *)_malloc_crt(size * sizeof(char))))
return;
if (0 == (wcstombs(amessage, wmessage, size)))
{
_free_crt (amessage);
return;
}
_lock_fh(fh); /* acquire file handle lock */
if (amessage && *amessage)
{
_write_lk(fh,(char *)amessage,strlen(amessage));
_write_lk(fh,": ",2);
}
_free_crt(amessage);
amessage = _sys_err_msg( errno );
_write_lk(fh,(char *)amessage,strlen(amessage));
_write_lk(fh,"\n",1);
_unlock_fh(fh); /* release file handle lock */
}