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- /* 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;
- }
-