contrib/bc/src/args.c

   1 /*
   2  * *****************************************************************************
   3  *
   4  * SPDX-License-Identifier: BSD-2-Clause
   5  *
   6  * Copyright (c) 2018-2020 Gavin D. Howard and contributors.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * * Redistributions of source code must retain the above copyright notice, this
  12  *   list of conditions and the following disclaimer.
  13  *
  14  * * Redistributions in binary form must reproduce the above copyright notice,
  15  *   this list of conditions and the following disclaimer in the documentation
  16  *   and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  22  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * *****************************************************************************
  31  *
  32  * Code for processing command-line arguments.
  33  *
  34  */
  35
  36 #include <assert.h>
  37 #include <ctype.h>
  38 #include <stdbool.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #include <unistd.h>
  43
  44 #include <vector.h>
  45 #include <read.h>
  46 #include <args.h>
  47 #include <opt.h>
  48
  49 static const BcOptLong bc_args_lopt[] = {
  50
  51         { "expression", BC_OPT_REQUIRED, 'e' },
  52         { "file", BC_OPT_REQUIRED, 'f' },
  53         { "help", BC_OPT_NONE, 'h' },
  54         { "interactive", BC_OPT_NONE, 'i' },
  55         { "no-prompt", BC_OPT_NONE, 'P' },
  56 #if BC_ENABLED
  57         { "global-stacks", BC_OPT_BC_ONLY, 'g' },
  58         { "mathlib", BC_OPT_BC_ONLY, 'l' },
  59         { "quiet", BC_OPT_BC_ONLY, 'q' },
  60         { "standard", BC_OPT_BC_ONLY, 's' },
  61         { "warn", BC_OPT_BC_ONLY, 'w' },
  62 #endif // BC_ENABLED
  63         { "version", BC_OPT_NONE, 'v' },
  64         { "version", BC_OPT_NONE, 'V' },
  65 #if DC_ENABLED
  66         { "extended-register", BC_OPT_DC_ONLY, 'x' },
  67 #endif // DC_ENABLED
  68         { NULL, 0, 0 },
  69
  70 };
  71
  72 static void bc_args_exprs(const char *str) {
  73         BC_SIG_ASSERT_LOCKED;
  74         if (vm.exprs.v == NULL) bc_vec_init(&vm.exprs, sizeof(uchar), NULL);
  75         bc_vec_concat(&vm.exprs, str);
  76         bc_vec_concat(&vm.exprs, "\n");
  77 }
  78
  79 static void bc_args_file(const char *file) {
  80
  81         char *buf;
  82
  83         BC_SIG_ASSERT_LOCKED;
  84
  85         vm.file = file;
  86
  87         bc_read_file(file, &buf);
  88         bc_args_exprs(buf);
  89         free(buf);
  90 }
  91
  92 void bc_args(int argc, char *argv[]) {
  93
  94         int c;
  95         size_t i;
  96         bool do_exit = false, version = false;
  97         BcOpt opts;
  98
  99         BC_SIG_ASSERT_LOCKED;
 100
 101         bc_opt_init(&opts, argv);
 102
 103         while ((c = bc_opt_parse(&opts, bc_args_lopt)) != -1) {
 104
 105                 switch (c) {
 106
 107                         case 'e':
 108                         {
 109                                 if (vm.no_exit_exprs)
 110                                         bc_vm_verr(BC_ERR_FATAL_OPTION, "-e (--expression)");
 111                                 bc_args_exprs(opts.optarg);
 112                                 break;
 113                         }
 114
 115                         case 'f':
 116                         {
 117                                 if (!strcmp(opts.optarg, "-")) vm.no_exit_exprs = true;
 118                                 else {
 119                                         if (vm.no_exit_exprs)
 120                                                 bc_vm_verr(BC_ERR_FATAL_OPTION, "-f (--file)");
 121                                         bc_args_file(opts.optarg);
 122                                 }
 123                                 break;
 124                         }
 125
 126                         case 'h':
 127                         {
 128                                 bc_vm_info(vm.help);
 129                                 do_exit = true;
 130                                 break;
 131                         }
 132
 133                         case 'i':
 134                         {
 135                                 vm.flags |= BC_FLAG_I;
 136                                 break;
 137                         }
 138
 139                         case 'P':
 140                         {
 141                                 vm.flags |= BC_FLAG_P;
 142                                 break;
 143                         }
 144
 145 #if BC_ENABLED
 146                         case 'g':
 147                         {
 148                                 assert(BC_IS_BC);
 149                                 vm.flags |= BC_FLAG_G;
 150                                 break;
 151                         }
 152
 153                         case 'l':
 154                         {
 155                                 assert(BC_IS_BC);
 156                                 vm.flags |= BC_FLAG_L;
 157                                 break;
 158                         }
 159
 160                         case 'q':
 161                         {
 162                                 assert(BC_IS_BC);
 163                                 // Do nothing.
 164                                 break;
 165                         }
 166
 167                         case 's':
 168                         {
 169                                 assert(BC_IS_BC);
 170                                 vm.flags |= BC_FLAG_S;
 171                                 break;
 172                         }
 173
 174                         case 'w':
 175                         {
 176                                 assert(BC_IS_BC);
 177                                 vm.flags |= BC_FLAG_W;
 178                                 break;
 179                         }
 180 #endif // BC_ENABLED
 181
 182                         case 'V':
 183                         case 'v':
 184                         {
 185                                 do_exit = version = true;
 186                                 break;
 187                         }
 188
 189 #if DC_ENABLED
 190                         case 'x':
 191                         {
 192                                 assert(BC_IS_DC);
 193                                 vm.flags |= DC_FLAG_X;
 194                                 break;
 195                         }
 196 #endif // DC_ENABLED
 197
 198 #ifndef NDEBUG
 199                         // We shouldn't get here because bc_opt_error()/bc_vm_error() should
 200                         // longjmp() out.
 201                         case '?':
 202                         case ':':
 203                         default:
 204                         {
 205                                 abort();
 206                         }
 207 #endif // NDEBUG
 208                 }
 209         }
 210
 211         if (version) bc_vm_info(NULL);
 212         if (do_exit) exit((int) vm.status);
 213
 214         if (opts.optind < (size_t) argc && vm.files.v == NULL)
 215                 bc_vec_init(&vm.files, sizeof(char*), NULL);
 216
 217         for (i = opts.optind; i < (size_t) argc; ++i)
 218                 bc_vec_push(&vm.files, argv + i);
 219 }