mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 12:19:35 +08:00
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/* xstrerror.c -- jacket routine for more robust strerror() usage.
|
|
Fri Jun 16 18:30:00 1995 Pat Rankin <rankin@eql.caltech.edu>
|
|
This code is in the public domain. */
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "libiberty.h"
|
|
#include "config.h"
|
|
|
|
#ifdef VMS
|
|
#include <errno.h>
|
|
#if !defined (__STRICT_ANSI__) && !defined (__HIDE_FORBIDDEN_NAMES)
|
|
extern char *strerror PARAMS ((int,...));
|
|
#define DONT_DECLARE_STRERROR
|
|
#endif
|
|
#endif /* VMS */
|
|
|
|
#ifndef DONT_DECLARE_STRERROR
|
|
extern char *strerror PARAMS ((int));
|
|
#endif
|
|
|
|
/* If strerror returns NULL, we'll format the number into a static buffer. */
|
|
|
|
#define ERRSTR_FMT "undocumented error #%d"
|
|
static char xstrerror_buf[sizeof ERRSTR_FMT + 20];
|
|
|
|
/* Like strerror, but result is never a null pointer. */
|
|
|
|
char *
|
|
xstrerror (errnum)
|
|
int errnum;
|
|
{
|
|
char *errstr;
|
|
#ifdef VMS
|
|
char *(*vmslib_strerror) PARAMS ((int,...));
|
|
|
|
/* Override any possibly-conflicting declaration from system header. */
|
|
vmslib_strerror = (char *(*) PARAMS ((int,...))) strerror;
|
|
/* Second argument matters iff first is EVMSERR, but it's simpler to
|
|
pass it unconditionally. `vaxc$errno' is declared in <errno.h>
|
|
and maintained by the run-time library in parallel to `errno'.
|
|
We assume that `errnum' corresponds to the last value assigned to
|
|
errno by the run-time library, hence vaxc$errno will be relevant. */
|
|
errstr = (*vmslib_strerror) (errnum, vaxc$errno);
|
|
#else
|
|
errstr = strerror (errnum);
|
|
#endif
|
|
|
|
/* If `errnum' is out of range, result might be NULL. We'll fix that. */
|
|
if (!errstr)
|
|
{
|
|
sprintf (xstrerror_buf, ERRSTR_FMT, errnum);
|
|
errstr = xstrerror_buf;
|
|
}
|
|
return errstr;
|
|
}
|