/* 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_STRERRORextern 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;}