source: trunk/src/gcc/libiberty/strsignal.c@ 1125

/* Extended support for using signal values.
   Written by Fred Fish.  [email protected]
   This file is in the public domain.  */

#include "ansidecl.h"
#include "libiberty.h"

#include "config.h"

/* We need to declare sys_siglist, because even if the system provides
   it we can't assume that it is declared in <signal.h> (for example,
   SunOS provides sys_siglist, but it does not declare it in any
   header file).  fHowever, we can't declare sys_siglist portably,
   because on some systems it is declared with const and on some
   systems it is declared without const.  If we were using autoconf,
   we could work out the right declaration.  Until, then we just
   ignore any declaration in the system header files, and always
   declare it ourselves.  With luck, this will always work.  */
#define sys_siglist no_such_symbol
#define sys_nsig sys_nsig__no_such_symbol

#include <stdio.h>
#include <signal.h>

/*  Routines imported from standard C runtime libraries. */

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#else
extern PTR malloc ();
#endif

#ifdef HAVE_STRING_H
#include <string.h>
#else
extern PTR memset ();
#endif

/* Undefine the macro we used to hide the definition of sys_siglist
   found in the system header files.  */
#undef sys_siglist
#undef sys_nsig

#ifndef NULL
#  ifdef __STDC__
#    define NULL (void *) 0
#  else
#    define NULL 0
#  endif
#endif

#ifndef MAX
#  define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif

static void init_signal_tables PARAMS ((void));

/* Translation table for signal values.

   Note that this table is generally only accessed when it is used at runtime
   to initialize signal name and message tables that are indexed by signal
   value.

   Not all of these signals will exist on all systems.  This table is the only
   thing that should have to be updated as new signal numbers are introduced.
   It's sort of ugly, but at least its portable. */

struct signal_info
{
  const int value;              /* The numeric value from <signal.h> */
  const char *const name;       /* The equivalent symbolic value */
#ifndef HAVE_SYS_SIGLIST
  const char *const msg;        /* Short message about this value */
#endif
};

#ifndef HAVE_SYS_SIGLIST
#   define ENTRY(value, name, msg)      {value, name, msg}
#else
#   define ENTRY(value, name, msg)      {value, name}
#endif

static const struct signal_info signal_table[] =