2 * *****************************************************************************
4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 2018-2023 Gavin D. Howard and contributors.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
11 * * Redistributions of source code must retain the above copyright notice, this
12 * list of conditions and the following disclaimer.
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.
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.
30 * *****************************************************************************
32 * Code for processing command-line arguments.
54 * Adds @a str to the list of expressions to execute later.
55 * @param str The string to add to the list of expressions.
58 bc_args_exprs(const char* str)
62 if (vm->exprs.v == NULL)
64 bc_vec_init(&vm->exprs, sizeof(uchar), BC_DTOR_NONE);
67 bc_vec_concat(&vm->exprs, str);
68 bc_vec_concat(&vm->exprs, "\n");
72 * Adds the contents of @a file to the list of expressions to execute later.
73 * @param file The name of the file whose contents should be added to the list
74 * of expressions to execute.
77 bc_args_file(const char* file)
85 buf = bc_read_file(file);
94 bc_args_builtin(const char* arg)
100 strvalid = bc_num_strValid(arg);
102 if (BC_ERR(!strvalid))
104 bc_verr(BC_ERR_FATAL_ARG, arg);
109 bc_num_parse(&n, arg, 10);
111 res = bc_num_bigdig(&n);
121 * Redefines a keyword, if it exists and is not a POSIX keyword. Otherwise, it
122 * throws a fatal error.
123 * @param keyword The keyword to redefine.
126 bc_args_redefine(const char* keyword)
130 BC_SIG_ASSERT_LOCKED;
132 for (i = 0; i < bc_lex_kws_len; ++i)
134 const BcLexKeyword* kw = bc_lex_kws + i;
136 if (!strcmp(keyword, kw->name))
138 if (BC_LEX_KW_POSIX(kw)) break;
140 vm->redefined_kws[i] = true;
146 bc_error(BC_ERR_FATAL_ARG, 0, keyword);
152 bc_args(int argc, char* argv[], bool exit_exprs, BcBigDig* scale,
153 BcBigDig* ibase, BcBigDig* obase)
157 bool do_exit = false, version = false;
159 #if BC_ENABLE_EXTRA_MATH
161 #endif // BC_ENABLE_EXTRA_MATH
163 BC_SIG_ASSERT_LOCKED;
165 bc_opt_init(&opts, argv);
167 // This loop should look familiar to anyone who has used getopt() or
168 // getopt_long() in C.
169 while ((c = bc_opt_parse(&opts, bc_args_lopt)) != -1)
175 vm->flags |= BC_FLAG_DIGIT_CLAMP;
181 vm->flags &= ~BC_FLAG_DIGIT_CLAMP;
187 // Barf if not allowed.
190 bc_verr(BC_ERR_FATAL_OPTION, "-e (--expression)");
193 // Add the expressions and set exit.
194 bc_args_exprs(opts.optarg);
195 vm->exit_exprs = (exit_exprs || vm->exit_exprs);
202 // Figure out if exiting on expressions is disabled.
203 if (!strcmp(opts.optarg, "-")) vm->no_exprs = true;
206 // Barf if not allowed.
209 bc_verr(BC_ERR_FATAL_OPTION, "-f (--file)");
212 // Add the expressions and set exit.
213 bc_args_file(opts.optarg);
214 vm->exit_exprs = (exit_exprs || vm->exit_exprs);
222 bc_vm_info(vm->help);
229 vm->flags |= BC_FLAG_I;
235 *ibase = bc_args_builtin(opts.optarg);
241 vm->flags |= BC_FLAG_Z;
253 *obase = bc_args_builtin(opts.optarg);
259 vm->flags &= ~(BC_FLAG_P);
265 vm->flags &= ~(BC_FLAG_R);
271 *scale = bc_args_builtin(opts.optarg);
275 #if BC_ENABLE_EXTRA_MATH
278 if (BC_ERR(!bc_num_strValid(opts.optarg)))
280 bc_verr(BC_ERR_FATAL_ARG, opts.optarg);
287 #endif // BC_ENABLE_EXTRA_MATH
293 vm->flags |= BC_FLAG_G;
300 vm->flags |= BC_FLAG_L;
307 vm->flags &= ~(BC_FLAG_Q);
313 bc_args_redefine(opts.optarg);
320 vm->flags |= BC_FLAG_S;
327 vm->flags |= BC_FLAG_W;
335 do_exit = version = true;
343 vm->flags |= DC_FLAG_X;
349 // We shouldn't get here because bc_opt_error()/bc_error() should
364 if (version) bc_vm_info(NULL);
367 vm->status = (sig_atomic_t) BC_STATUS_QUIT;
371 // We do not print the banner if expressions are used or dc is used.
372 if (BC_ARGS_SHOULD_BE_QUIET) vm->flags &= ~(BC_FLAG_Q);
374 // We need to make sure the files list is initialized. We don't want to
375 // initialize it if there are no files because it's just a waste of memory.
376 if (opts.optind < (size_t) argc && vm->files.v == NULL)
378 bc_vec_init(&vm->files, sizeof(char*), BC_DTOR_NONE);
381 // Add all the files to the vector.
382 for (i = opts.optind; i < (size_t) argc; ++i)
384 bc_vec_push(&vm->files, argv + i);
387 #if BC_ENABLE_EXTRA_MATH
392 bc_num_init(&n, strlen(seed));
396 bc_num_parse(&n, seed, BC_BASE);
398 bc_program_assignSeed(&vm->prog, &n);
404 #endif // BC_ENABLE_EXTRA_MATH