1/*
2 * *****************************************************************************
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c) 2018-2021 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#ifndef _WIN32
43#include <unistd.h>
44#endif // _WIN32
45
46#include <vector.h>
47#include <read.h>
48#include <args.h>
49#include <opt.h>
50
51static const BcOptLong bc_args_lopt[] = {
52
53	{ "expression", BC_OPT_REQUIRED, 'e' },
54	{ "file", BC_OPT_REQUIRED, 'f' },
55	{ "help", BC_OPT_NONE, 'h' },
56	{ "interactive", BC_OPT_NONE, 'i' },
57	{ "no-prompt", BC_OPT_NONE, 'P' },
58	{ "no-read-prompt", BC_OPT_NONE, 'R' },
59#if BC_ENABLED
60	{ "global-stacks", BC_OPT_BC_ONLY, 'g' },
61	{ "mathlib", BC_OPT_BC_ONLY, 'l' },
62	{ "quiet", BC_OPT_BC_ONLY, 'q' },
63	{ "standard", BC_OPT_BC_ONLY, 's' },
64	{ "warn", BC_OPT_BC_ONLY, 'w' },
65#endif // BC_ENABLED
66	{ "version", BC_OPT_NONE, 'v' },
67	{ "version", BC_OPT_NONE, 'V' },
68#if DC_ENABLED
69	{ "extended-register", BC_OPT_DC_ONLY, 'x' },
70#endif // DC_ENABLED
71	{ NULL, 0, 0 },
72
73};
74
75static void bc_args_exprs(const char *str) {
76	BC_SIG_ASSERT_LOCKED;
77	if (vm.exprs.v == NULL) bc_vec_init(&vm.exprs, sizeof(uchar), NULL);
78	bc_vec_concat(&vm.exprs, str);
79	bc_vec_concat(&vm.exprs, "\n");
80}
81
82static void bc_args_file(const char *file) {
83
84	char *buf;
85
86	BC_SIG_ASSERT_LOCKED;
87
88	vm.file = file;
89
90	bc_read_file(file, &buf);
91	bc_args_exprs(buf);
92	free(buf);
93}
94
95void bc_args(int argc, char *argv[], bool exit_exprs) {
96
97	int c;
98	size_t i;
99	bool do_exit = false, version = false;
100	BcOpt opts;
101
102	BC_SIG_ASSERT_LOCKED;
103
104	bc_opt_init(&opts, argv);
105
106	while ((c = bc_opt_parse(&opts, bc_args_lopt)) != -1) {
107
108		switch (c) {
109
110			case 'e':
111			{
112				if (vm.no_exit_exprs)
113					bc_vm_verr(BC_ERR_FATAL_OPTION, "-e (--expression)");
114				bc_args_exprs(opts.optarg);
115				vm.exit_exprs = (exit_exprs || vm.exit_exprs);
116				break;
117			}
118
119			case 'f':
120			{
121				if (!strcmp(opts.optarg, "-")) vm.no_exit_exprs = true;
122				else {
123					if (vm.no_exit_exprs)
124						bc_vm_verr(BC_ERR_FATAL_OPTION, "-f (--file)");
125					bc_args_file(opts.optarg);
126					vm.exit_exprs = (exit_exprs || vm.exit_exprs);
127				}
128				break;
129			}
130
131			case 'h':
132			{
133				bc_vm_info(vm.help);
134				do_exit = true;
135				break;
136			}
137
138			case 'i':
139			{
140				vm.flags |= BC_FLAG_I;
141				break;
142			}
143
144			case 'P':
145			{
146				vm.flags |= BC_FLAG_P;
147				break;
148			}
149
150			case 'R':
151			{
152				vm.flags |= BC_FLAG_R;
153				break;
154			}
155
156#if BC_ENABLED
157			case 'g':
158			{
159				assert(BC_IS_BC);
160				vm.flags |= BC_FLAG_G;
161				break;
162			}
163
164			case 'l':
165			{
166				assert(BC_IS_BC);
167				vm.flags |= BC_FLAG_L;
168				break;
169			}
170
171			case 'q':
172			{
173				assert(BC_IS_BC);
174				// Do nothing.
175				break;
176			}
177
178			case 's':
179			{
180				assert(BC_IS_BC);
181				vm.flags |= BC_FLAG_S;
182				break;
183			}
184
185			case 'w':
186			{
187				assert(BC_IS_BC);
188				vm.flags |= BC_FLAG_W;
189				break;
190			}
191#endif // BC_ENABLED
192
193			case 'V':
194			case 'v':
195			{
196				do_exit = version = true;
197				break;
198			}
199
200#if DC_ENABLED
201			case 'x':
202			{
203				assert(BC_IS_DC);
204				vm.flags |= DC_FLAG_X;
205				break;
206			}
207#endif // DC_ENABLED
208
209#ifndef NDEBUG
210			// We shouldn't get here because bc_opt_error()/bc_vm_error() should
211			// longjmp() out.
212			case '?':
213			case ':':
214			default:
215			{
216				abort();
217			}
218#endif // NDEBUG
219		}
220	}
221
222	if (version) bc_vm_info(NULL);
223	if (do_exit) exit((int) vm.status);
224
225	if (opts.optind < (size_t) argc && vm.files.v == NULL)
226		bc_vec_init(&vm.files, sizeof(char*), NULL);
227
228	for (i = opts.optind; i < (size_t) argc; ++i)
229		bc_vec_push(&vm.files, argv + i);
230}
231