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 *    fhist - file history and comparison tools
 *    Copyright (C) 1993, 1994, 1998, 2002 Peter Miller;
 *    All rights reserved.
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    GNU General Public License for more details.
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 * MANIFEST: functions to implement missing ANSI C <string.h> functions
 * This file contains functions for use with non-ANSI conforming systems
 * to implement absent ANSI functionality.

#include <ac/stddef.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <ac/stdio.h>

#include <main.h>

 *  NAME
 *      strerror - string for error number
 *      char *strerror(int errnum);
 *      The strerror function maps the error number in errnum to an error
 *      message string.
 *      The strerror function returns a pointer to the string, the contents of
 *      which are implementation-defined.  The array pointed to shall not be
 *      modified by the program, but may be overwritten by a subsequent call to
 *      the strerror function.
 *      Unknown errors will be rendered in the form "Error %d", where %d will
 *      be replaced by a decimal representation of the error number.


char *
strerror(int n)
    extern int      sys_nerr;
    extern char     *sys_errlist[];
    static char     buffer[30];

    if (n < 1 || n > sys_nerr)
      sprintf(buffer, "Error %d", n);
      return buffer;
    return sys_errlist[n];

#endif /* !HAVE_STRERROR */


strcasecmp(const char *s1, const char *s2)
    int             c1;
    int             c2;

    for (;;)
      c1 = *s1++;
      if (islower(c1))
          c1 = toupper(c1);
      c2 = *s2++;
      if (islower(c2))
          c2 = toupper(c2);
      if (c1 != c2)
           * if s1 is a leading substring of s2, must
           * return -1, even if the next character of s2
           * is negative.
          if (!c1)
            return -1;
          if (c1 < c2)
            return -1;
          return 1;
      if (!c1)
          return 0;

#endif /* !HAVE_STRCASECMP */


char *
strsignal(int n)
    static char     buffer[16];

    switch (n)
#ifdef SIGHUP
    case SIGHUP:
      return "hang up [SIGHUP]";
#endif /* SIGHUP */

#ifdef SIGINT
    case SIGINT:
      return "user interrupt [SIGINT]";
#endif /* SIGINT */

#ifdef SIGQUIT
    case SIGQUIT:
      return "user quit [SIGQUIT]";
#endif /* SIGQUIT */

#ifdef SIGILL
    case SIGILL:
      return "illegal instruction [SIGILL]";
#endif /* SIGILL */

#ifdef SIGTRAP
    case SIGTRAP:
      return "trace trap [SIGTRAP]";
#endif /* SIGTRAP */

#ifdef SIGIOT
    case SIGIOT:
      return "abort [SIGIOT]";
#endif /* SIGIOT */

#ifdef SIGEMT
    case SIGEMT:
      return "EMT instruction [SIGEMT]";
#endif /* SIGEMT */

#ifdef SIGFPE
    case SIGFPE:
      return "floating point exception [SIGFPE]";
#endif /* SIGFPE */

#ifdef SIGKILL
    case SIGKILL:
      return "kill [SIGKILL]";
#endif /* SIGKILL */

#ifdef SIGBUS
    case SIGBUS:
      return "bus error [SIGBUS]";
#endif /* SIGBUS */

#ifdef SIGSEGV
    case SIGSEGV:
      return "segmentation violation [SIGSEGV]";
#endif /* SIGSEGV */

#ifdef SIGSYS
    case SIGSYS:
      return "bad argument to system call [SIGSYS]";
#endif /* SIGSYS */

#ifdef SIGPIPE
    case SIGPIPE:
      return "write on a pipe with no one to read it [SIGPIPE]";
#endif /* SIGPIPE */

#ifdef SIGALRM
    case SIGALRM:
      return "alarm clock [SIGALRM]";
#endif /* SIGALRM */

#ifdef SIGTERM
    case SIGTERM:
      return "software termination [SIGTERM]";
#endif /* SIGTERM */

#ifdef SIGUSR1
    case SIGUSR1:
      return "user defined signal one [SIGUSR1]";
#endif /* SIGUSR1 */

#ifdef SIGUSR2
    case SIGUSR2:
      return "user defined signal two [SIGUSR2]";
#endif /* SIGUSR2 */

#ifdef SIGCLD
    case SIGCLD:
      return "death of child [SIGCLD]";
#endif /* SIGCLD */

#ifdef SIGPWR
    case SIGPWR:
      return "power failure [SIGPWR]";
#endif /* SIGPWR */

      sprintf(buffer, "signal %d", n);
      return buffer;

#endif /* !HAVE_STRSIGNAL */

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