123 lines
3.1 KiB
C
123 lines
3.1 KiB
C
|
/***
|
||
|
|
*strerror.c - Contains the strerror C runtime.
|
||
|
|
*
|
||
|
|
* Copyright (c) 1987-2001, Microsoft Corporation. All rights reserved.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* The strerror runtime accepts an error number as input
|
||
|
|
* and returns the corresponding error string.
|
||
|
|
*
|
||
|
|
* NOTE: The "old" strerror C runtime resides in file _strerr.c
|
||
|
|
* and is now called _strerror. The new strerror runtime
|
||
|
|
* conforms to the ANSI standard.
|
||
|
|
*
|
||
|
|
*Revision History:
|
||
|
|
* 02-24-87 JCR Module created.
|
||
|
|
* 12-11-87 JCR Added "_LOAD_DS" to declaration
|
||
|
|
* 01-04-87 JCR Improved code.
|
||
|
|
* 01-05-87 JCR Multi-thread support
|
||
|
|
* 05-31-88 PHG Merge DLL and normal versions
|
||
|
|
* 06-06-89 JCR 386 mthread support
|
||
|
|
* 03-16-90 GJF Replaced _LOAD_DS with _CALLTYPE1, added #include
|
||
|
|
* <cruntime.h> and fixed the copyright. Also, cleaned
|
||
|
|
* up the formatting a bit.
|
||
|
|
* 10-04-90 GJF New-style function declarator.
|
||
|
|
* 07-18-91 GJF Multi-thread support for Win32 [_WIN32_].
|
||
|
|
* 02-17-93 GJF Changed for new _getptd().
|
||
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
||
|
|
* 09-06-94 CFW Remove Cruiser support.
|
||
|
|
* 09-06-94 CFW Replace MTHREAD with _MT.
|
||
|
|
* 01-10-95 CFW Debug CRT allocs.
|
||
|
|
* 11-24-99 GB Added support for wide char by adding wcserror()
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#include <cruntime.h>
|
||
|
|
#include <errmsg.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <syserr.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <mtdll.h>
|
||
|
|
#include <tchar.h>
|
||
|
|
#ifdef _MT
|
||
|
|
#include <malloc.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
#endif
|
||
|
|
#include <dbgint.h>
|
||
|
|
|
||
|
|
/* [NOTE: The _MT error message buffer is shared by both strerror
|
||
|
|
and _strerror so must be the max length of both. */
|
||
|
|
#ifdef _MT
|
||
|
|
/* Max length of message = user_string(94)+system_string+2 */
|
||
|
|
#define _ERRMSGLEN_ 94+_SYS_MSGMAX+2
|
||
|
|
#else
|
||
|
|
/* Max length of message = system_string+2 */
|
||
|
|
#define _ERRMSGLEN_ _SYS_MSGMAX+2
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef _UNICODE
|
||
|
|
#define _terrmsg _werrmsg
|
||
|
|
#else
|
||
|
|
#define _terrmsg _errmsg
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/***
|
||
|
|
*char *strerror(errnum) - Map error number to error message string.
|
||
|
|
*
|
||
|
|
*Purpose:
|
||
|
|
* The strerror runtime takes an error number for input and
|
||
|
|
* returns the corresponding error message string. This routine
|
||
|
|
* conforms to the ANSI standard interface.
|
||
|
|
*
|
||
|
|
*Entry:
|
||
|
|
* int errnum - Integer error number (corresponding to an errno value).
|
||
|
|
*
|
||
|
|
*Exit:
|
||
|
|
* char * - Strerror returns a pointer to the error message string.
|
||
|
|
* This string is internal to the strerror routine (i.e., not supplied
|
||
|
|
* by the user).
|
||
|
|
*
|
||
|
|
*Exceptions:
|
||
|
|
* None.
|
||
|
|
*
|
||
|
|
*******************************************************************************/
|
||
|
|
|
||
|
|
#ifdef _UNICODE
|
||
|
|
wchar_t * cdecl _wcserror(
|
||
|
|
#else
|
||
|
|
char * __cdecl strerror (
|
||
|
|
#endif
|
||
|
|
int errnum
|
||
|
|
)
|
||
|
|
{
|
||
|
|
#ifdef _MT
|
||
|
|
|
||
|
|
_ptiddata ptd = _getptd();
|
||
|
|
|
||
|
|
_TCHAR *errmsg;
|
||
|
|
static _TCHAR errmsg_backup[_SYS_MSGMAX+2];
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
static _TCHAR errmsg[_ERRMSGLEN_]; /* Longest errmsg + \0 */
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef _MT
|
||
|
|
|
||
|
|
if ( (ptd->_terrmsg == NULL) && ((ptd->_terrmsg =
|
||
|
|
_malloc_crt(_ERRMSGLEN_ * sizeof(_TCHAR)))
|
||
|
|
== NULL) )
|
||
|
|
errmsg = errmsg_backup; /* error: use backup */
|
||
|
|
else
|
||
|
|
errmsg = ptd->_terrmsg;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
#ifdef _UNICODE
|
||
|
|
mbstowcs(errmsg, _sys_err_msg(errnum), _ERRMSGLEN_);
|
||
|
|
#else
|
||
|
|
strcpy(errmsg, _sys_err_msg(errnum));
|
||
|
|
#endif
|
||
|
|
return(errmsg);
|
||
|
|
}
|