source: mainline/uspace/app/sbi/src/main.c

/*
 * Copyright (c) 2010 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 */

/** @file Main module.
 *
 * Main entry point for SBI, the Sysel Bootstrap Interpreter.
 * When run without parameters, the interpreter will enter interactive
 * mode.
 */

#include <stdio.h>
#include <stdlib.h>
#include "ancr.h"
#include "os/os.h"
#include "builtin.h"
#include "imode.h"
#include "mytypes.h"
#include "program.h"
#include "strtab.h"
#include "stree.h"
#include "stype.h"
#include "input.h"
#include "lex.h"
#include "parse.h"
#include "run.h"

static void syntax_print(void);

/** Main entry point.
 *
 * @return      Zero on success, non-zero on error.
 */
int main(int argc, char *argv[])
{
        stree_program_t *program;
        stype_t stype;
        run_t run;
        errno_t rc;

        /* Store executable file path under which we have been invoked. */
        os_store_ef_path(*argv);

        argv += 1;
        argc -= 1;

        if (argc == 0) {
                /* Enter interactive mode */
                strtab_init();
                imode_run();
                return 0;
        }

        if (os_str_cmp(*argv, "-h") == 0) {
                syntax_print();
                return 0;
        }

        strtab_init();
        program = stree_program_new();
        program->module = stree_module_new();

        /* Declare builtin symbols. */
        builtin_declare(program);

        /* Process source files in the library. */
        if (program_lib_process(program) != EOK)
                return 1;

        /* Resolve ancestry. */
        ancr_module_process(program, program->module);

        /* Bind internal interpreter references to symbols. */
        builtin_bind(program->builtin);

        /* Process all source files specified in command-line arguments. */
        while (argc > 0) {
                rc = program_file_process(program, *argv);
                if (rc != EOK)
                        return 1;

                argv += 1;
                argc -= 1;
        }

        /* Resolve ancestry. */
        ancr_module_process(program, program->module);

        /* Type program. */
        stype.program = program;
        stype.error = b_false;
        stype_module(&stype, program->module);

        /* Check for typing errors. */
        if (stype.error)
                return 1;

        /* Run program. */
        run_init(&run);
        run_program(&run, program);

        /* Check for run-time errors. */
        if (run.thread_ar->error)
                return 1;

        return 0;
}

/** Print command-line syntax help. */
static void syntax_print(void)
{
        printf("Syntax: sbi <source_file.sy>\n");
}