uspace/app/sbi/src/main.c

   1 /*
   2  * Copyright (c) 2010 Jiri Svoboda
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @file Main module.
  30  *
  31  * Main entry point for SBI, the Sysel Bootstrap Interpreter.
  32  * When run without parameters, the interpreter will enter interactive
  33  * mode.
  34  */
  35
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include "ancr.h"
  39 #include "os/os.h"
  40 #include "builtin.h"
  41 #include "imode.h"
  42 #include "mytypes.h"
  43 #include "program.h"
  44 #include "strtab.h"
  45 #include "stree.h"
  46 #include "stype.h"
  47 #include "input.h"
  48 #include "lex.h"
  49 #include "parse.h"
  50 #include "run.h"
  51
  52 static void syntax_print(void);
  53
  54 /** Main entry point.
  55  *
  56  * @return      Zero on success, non-zero on error.
  57  */
  58 int main(int argc, char *argv[])
  59 {
  60         stree_program_t *program;
  61         stype_t stype;
  62         run_t run;
  63         errno_t rc;
  64
  65         /* Store executable file path under which we have been invoked. */
  66         os_store_ef_path(*argv);
  67
  68         argv += 1;
  69         argc -= 1;
  70
  71         if (argc == 0) {
  72                 /* Enter interactive mode */
  73                 strtab_init();
  74                 imode_run();
  75                 return 0;
  76         }
  77
  78         if (os_str_cmp(*argv, "-h") == 0) {
  79                 syntax_print();
  80                 return 0;
  81         }
  82
  83         strtab_init();
  84         program = stree_program_new();
  85         program->module = stree_module_new();
  86
  87         /* Declare builtin symbols. */
  88         builtin_declare(program);
  89
  90         /* Process source files in the library. */
  91         if (program_lib_process(program) != EOK)
  92                 return 1;
  93
  94         /* Resolve ancestry. */
  95         ancr_module_process(program, program->module);
  96
  97         /* Bind internal interpreter references to symbols. */
  98         builtin_bind(program->builtin);
  99
 100         /* Process all source files specified in command-line arguments. */
 101         while (argc > 0) {
 102                 rc = program_file_process(program, *argv);
 103                 if (rc != EOK)
 104                         return 1;
 105
 106                 argv += 1;
 107                 argc -= 1;
 108         }
 109
 110         /* Resolve ancestry. */
 111         ancr_module_process(program, program->module);
 112
 113         /* Type program. */
 114         stype.program = program;
 115         stype.error = b_false;
 116         stype_module(&stype, program->module);
 117
 118         /* Check for typing errors. */
 119         if (stype.error)
 120                 return 1;
 121
 122         /* Run program. */
 123         run_init(&run);
 124         run_program(&run, program);
 125
 126         /* Check for run-time errors. */
 127         if (run.thread_ar->error)
 128                 return 1;
 129
 130         return 0;
 131 }
 132
 133 /** Print command-line syntax help. */
 134 static void syntax_print(void)
 135 {
 136         printf("Syntax: sbi <source_file.sy>\n");
 137 }