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/***
*_strerr.c - routine for indexing into system error list
*
* Copyright (c) 1985-1993, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Returns system error message index by errno; conforms to the
* XENIX standard, much compatibility with 1983 uniforum draft standard.
*
*Revision History:
* 02-24-87 JCR Renamed this routine from "strerror" to "_strerror"
* for MS. The new "strerror" routine conforms to the
* ANSI interface.
* 11-10-87 SKS Remove IBMC20 switch
* 12-11-87 JCR Added "_LOAD_DS" to declaration
* 01-05-87 JCR Mthread support
* 05-31-88 PHG Merged DLL and normal versions
* 06-06-89 JCR 386 mthread support
* 11-20-89 GJF Fixed copyright, indents. Removed unreferenced local.
* Added const attribute to type of message
* 03-13-90 GJF Replaced _LOAD_DS with _CALLTYPE1, added #include
* <cruntime.h> and removed #include <register.h>
* 07-25-90 SBM Removed redundant include (stdio.h)
* 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().
*
*******************************************************************************/
#include <cruntime.h>
#include <stdlib.h>
#include <errmsg.h>
#include <syserr.h>
#include <string.h>
#include <malloc.h>
#include <os2dll.h>
/* Max length of message = user_string(94)+system_string+2 */
/* [NOTE: The mthread error message buffer is shared by both strerror
and _strerror so must be the max length of both. */
#define _ERRMSGLEN_ 94+_SYS_MSGMAX+2
/***
*char *_strerror(message) - get system error message
*
*Purpose:
* builds an error message consisting of the users error message
* (the message parameter), followed by ": ", followed by the system
* error message (index through errno), followed by a newline. If
* message is NULL or a null string, returns a pointer to just
* the system error message.
*
*Entry:
* char *message - user's message to prefix system error message
*
*Exit:
* returns pointer to static memory containing error message.
* returns NULL if malloc() fails in multi-thread versions.
*
*Exceptions:
*
*******************************************************************************/
char * _CRTAPI1 _strerror (
REG1 const char *message
)
{
#ifdef MTHREAD
#ifdef _CRUISER_
struct _tiddata * tdata;
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
_ptiddata ptd = _getptd();
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
char *bldmsg;
#else
static char bldmsg[_ERRMSGLEN_];
#endif
#ifdef MTHREAD
#ifdef _CRUISER_
/* Use per thread buffer area (malloc space, if necessary) */
/* [NOTE: This buffer is shared between _strerror and streror.] */
tdata = _gettidtab(); /* get tid's data address */
if (tdata->_errmsg == NULL)
if ( (tdata->_errmsg = malloc(_ERRMSGLEN_)) == NULL)
return(NULL);
bldmsg = tdata->_errmsg;
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
/* Use per thread buffer area (malloc space, if necessary) */
/* [NOTE: This buffer is shared between _strerror and streror.] */
if ( (ptd->_errmsg == NULL) && ((ptd->_errmsg = malloc(_ERRMSGLEN_))
== NULL) )
return(NULL);
bldmsg = ptd->_errmsg;
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
#endif
/* Build the error message */
bldmsg[0] = '\0';
if (message && *message) {
strcat( bldmsg, message );
strcat( bldmsg, ": " );
}
strcat( bldmsg, _sys_err_msg( errno ) );
return( strcat( bldmsg, "\n" ) );
}
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