102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
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/***
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*wperror.c - print system error message (wchar_t version)
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*
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* Copyright (c) 1993-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* defines _wperror() - print wide system error message
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* System error message are indexed by errno.
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*
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*Revision History:
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* 12-07-93 CFW Module created from perror.
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* 02-07-94 CFW POSIXify.
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* 01-10-95 CFW Debug CRT allocs.
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* 01-06-98 GJF Exception-safe locking.
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* 09-23-98 GJF Fixed handling of NULL or empty string arg.
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* 01-06-99 GJF Changes for 64-bit size_t.
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*
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*******************************************************************************/
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syserr.h>
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#include <mtdll.h>
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#include <io.h>
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#include <dbgint.h>
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/***
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*void _wperror(wmessage) - print system error message
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*
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*Purpose:
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* prints user's error message, then follows it with ": ", then the system
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* error message, then a newline. All output goes to stderr. If user's
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* message is NULL or a null string, only the system error message is
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* printer. If errno is weird, prints "Unknown error".
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*
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*Entry:
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* const wchar_t *wmessage - users message to prefix system error message
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*
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*Exit:
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* Prints message; no return value.
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*
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*Exceptions:
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*
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*******************************************************************************/
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void __cdecl _wperror (
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const wchar_t *wmessage
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)
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{
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int fh = 2;
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size_t size;
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char *amessage;
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/* convert WCS string into ASCII string */
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if ( wmessage && *wmessage )
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{
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size = wcslen(wmessage) + 1;
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if ( NULL == (amessage = (char *)_malloc_crt(size * sizeof(char))) )
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return;
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if ( 0 >= wcstombs(amessage, wmessage, size) )
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{
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_free_crt(amessage);
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return;
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}
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}
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else
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amessage = NULL;
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#ifdef _MT
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_lock_fh( fh ); /* acquire file handle lock */
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__try {
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#endif
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if ( amessage )
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{
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_write_lk(fh,(char *)amessage,(unsigned)strlen(amessage));
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_write_lk(fh,": ",2);
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}
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_free_crt(amessage); /* note: freeing NULL is legal and benign */
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amessage = _sys_err_msg( errno );
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_write_lk(fh,(char *)amessage,(unsigned)strlen(amessage));
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_write_lk(fh,"\n",1);
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#ifdef _MT
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}
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__finally {
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_unlock_fh( fh ); /* release file handle lock */
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}
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#endif
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}
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#endif /* _POSIX_ */
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