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jim_list.c

/*-
 * Copyright (c) 2010 Wojciech A. Koszek <wkoszek@FreeBSD.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id$
 */

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define JIM_EMBEDDED
#include <jim.h>

/*
 * We have a list of sample words in 'C'..
 */
const char *strings[] = {
      "simple",
      "strings",
      "which",
      "should",
      "get",
      "interpreted",
      "by",
      "Jim",
};

/* 
 * We have macros which let us to easily obtain of array presented above
 */
#define     ARRAY_SIZE(a)     (sizeof((a)) / sizeof((a)[0]))
#define     SAMPLE_OBJS ARRAY_SIZE(strings)

/*
 * Now we try to write big enough code to duplication our array in Jim's
 * list implementation. Later, we try to load a sample script in Tcl that
 * could print our list.
 */
int
main(int argc, char **argv)
{
      Jim_Interp *interp;
      Jim_Obj     *obj[SAMPLE_OBJS];
      Jim_Obj     *list;
      int i;
      int error;

      /* Create an interpreter */
      interp = Jim_CreateInterp();

      /* We register base commands, so that we actually implement Tcl. */
      Jim_RegisterCoreCommands(interp);

      /* And initialise any static extensions */
      Jim_InitStaticExtensions(interp);

      /* Create an empty list */
      list = Jim_NewListObj(interp, NULL, 0);
      assert(list != NULL);

      /*
       * For each string..
       */
      for (i = 0; i < SAMPLE_OBJS; i++) {
            /* Duplicate it as an array member. */
            obj[i] = Jim_NewStringObj(interp, strings[i], -1);
            assert(obj[i] != NULL);

            /* We append newly created object to the list */
            Jim_ListAppendElement(interp, list, obj[i]);
      }

      /* 
       * We bind a Tcl's name with our list, so that Tcl script can
       * identify the variable.
       */
      Jim_SetVariableStr(interp, "MYLIST", list);

      /*
       * Parse a script
       */
      error = Jim_EvalFile(interp, "./print.tcl");
      if (error == JIM_ERR) {
            Jim_MakeErrorMessage(interp);
            fprintf(stderr, "%s\n", Jim_GetString(Jim_GetResult(interp), NULL));
      }
      Jim_FreeInterp(interp);
      return (EXIT_SUCCESS);
}

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