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Sourcecode: fhist version File versions

version.c

/*
 *    fhist - file history and comparison tools
 *    Copyright (C) 1991-1994, 1998, 2001, 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
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    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 provide common -VERSion behaviour
 */

#include <ac/stdio.h>

#include <arglex.h>
#include <error.h>
#include <help.h>
#include <progname.h>
#include <quit.h>
#include <str.h>
#include <trace.h>
#include <version.h>
#include <version_stmp.h>


static void
version_copyright(void)
{
      static char *text[] =
      {
            "All rights reserved.",
            "",
            "This program is derived from a work",
            "Copyright (C) 1990 David I. Bell.",
            "",
            "The %s program comes with ABSOLUTELY NO WARRANTY;",
            "for details use the '%s -VERSion License' command.",
            "The %s program is free software, and you are welcome",
            "to redistribute it under certain conditions; for",
            "details use the '%s -VERSion License' command.",
      };

      char        **cpp;
      char        *progname;

      progname = progname_get();
      printf("%s version %s\n", progname, version_stamp());
      printf("Copyright (C) %s Peter Miller;\n", copyright_years());
      for (cpp = text; cpp < ENDOF(text); ++cpp)
      {
            printf(*cpp, progname);
            fputc('\n', stdout);
      }
}


static void
version_license(void)
{
      help("fhist_lic", (void (*)(void))0);
}


typedef struct table_ty table_ty;
struct table_ty
{
      char  *name;
      void  (*func)(void);
};


static      table_ty    table[] =
{
      { "Copyright",    version_copyright,      },
      { "License",      version_license,  },
};


static void
usage(void)
{
      char        *progname;

      progname = progname_get();
      fprintf(stderr, "Usage: %s -VERSion [ name ]\n", progname);
      fprintf(stderr, "       %s -Help\n", progname);
      quit(1);
}


void
version(void)
{
      void  (*func)(void);
      char  *name;

      trace(("version()\n{\n"));
      arglex();
      name = 0;
      while (arglex_token != arglex_token_eoln)
      {
            switch (arglex_token)
            {
            default:
                  bad_argument(usage);
                  continue;

            case arglex_token_string:
                  if (name)
                        fatal_raw("too many info names");
                  name = arglex_value.alv_string;
                  break;
            }
            arglex();
      }

      if (name)
      {
            int         nhit;
            table_ty    *tp;
            string_ty   *s1;
            string_ty   *s2;
            table_ty    *hit[SIZEOF(table)];
            int         j;

            nhit = 0;
            for (tp = table; tp < ENDOF(table); ++tp)
            {
                  if (arglex_compare(tp->name, name))
                        hit[nhit++] = tp;
            }
            switch (nhit)
            {
            case 0:
                  fatal_raw("no info %s", name);

            case 1:
                  break;

            default:
                  s1 = str_from_c(hit[0]->name);
                  for (j = 1; j < nhit; ++j)
                  {
                        s2 = str_format("%S, %s", s1, hit[j]->name);
                        str_free(s1);
                        s1 = s2;
                  }
                  fatal_raw("info %s ambig (%S)", name, s1);
            }
            arglex();
            func = hit[0]->func;
      }
      else
            func = version_copyright;

      func();
      trace(("}\n"));
}

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