vendor/bc/3.0.2

1 files changed, 215 insertions, 0 deletions

diff --git a/src/args.c b/src/args.c
new file mode 100644
index 000000000000..d3735178fc48
--- /dev/null
+++ b/src/args.c
@@ -0,0 +1,215 @@
+/*
+ * *****************************************************************************
+ *
+ * Copyright (c) 2018-2020 Gavin D. Howard and contributors.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ * *****************************************************************************
+ *
+ * Code for processing command-line arguments.
+ *
+ */
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+
+#include <status.h>
+#include <vector.h>
+#include <read.h>
+#include <vm.h>
+#include <args.h>
+#include <opt.h>
+
+static const BcOptLong bc_args_lopt[] = {
+
+	{ "expression", BC_OPT_REQUIRED, 'e' },
+	{ "file", BC_OPT_REQUIRED, 'f' },
+	{ "help", BC_OPT_NONE, 'h' },
+	{ "interactive", BC_OPT_NONE, 'i' },
+	{ "no-prompt", BC_OPT_NONE, 'P' },
+#if BC_ENABLED
+	{ "global-stacks", BC_OPT_BC_ONLY, 'g' },
+	{ "mathlib", BC_OPT_BC_ONLY, 'l' },
+	{ "quiet", BC_OPT_BC_ONLY, 'q' },
+	{ "standard", BC_OPT_BC_ONLY, 's' },
+	{ "warn", BC_OPT_BC_ONLY, 'w' },
+#endif // BC_ENABLED
+	{ "version", BC_OPT_NONE, 'v' },
+	{ "version", BC_OPT_NONE, 'V' },
+#if DC_ENABLED
+	{ "extended-register", BC_OPT_DC_ONLY, 'x' },
+#endif // DC_ENABLED
+	{ NULL, 0, 0 },
+
+};
+
+static void bc_args_exprs(const char *str) {
+	BC_SIG_ASSERT_LOCKED;
+	if (vm.exprs.v == NULL) bc_vec_init(&vm.exprs, sizeof(uchar), NULL);
+	bc_vec_concat(&vm.exprs, str);
+	bc_vec_concat(&vm.exprs, "\n");
+}
+
+static void bc_args_file(const char *file) {
+
+	char *buf;
+
+	BC_SIG_ASSERT_LOCKED;
+
+	vm.file = file;
+
+	bc_read_file(file, &buf);
+	bc_args_exprs(buf);
+	free(buf);
+}
+
+void bc_args(int argc, char *argv[]) {
+
+	int c;
+	size_t i;
+	bool do_exit = false, version = false;
+	BcOpt opts;
+
+	BC_SIG_ASSERT_LOCKED;
+
+	bc_opt_init(&opts, argv);
+
+	while ((c = bc_opt_parse(&opts, bc_args_lopt)) != -1) {
+
+		switch (c) {
+
+			case 'e':
+			{
+				bc_args_exprs(opts.optarg);
+				break;
+			}
+
+			case 'f':
+			{
+				bc_args_file(opts.optarg);
+				break;
+			}
+
+			case 'h':
+			{
+				bc_vm_info(vm.help);
+				do_exit = true;
+				break;
+			}
+
+			case 'i':
+			{
+				vm.flags |= BC_FLAG_I;
+				break;
+			}
+
+			case 'P':
+			{
+				vm.flags |= BC_FLAG_P;
+				break;
+			}
+
+#if BC_ENABLED
+			case 'g':
+			{
+				assert(BC_IS_BC);
+				vm.flags |= BC_FLAG_G;
+				break;
+			}
+
+			case 'l':
+			{
+				assert(BC_IS_BC);
+				vm.flags |= BC_FLAG_L;
+				break;
+			}
+
+			case 'q':
+			{
+				assert(BC_IS_BC);
+				vm.flags |= BC_FLAG_Q;
+				break;
+			}
+
+			case 's':
+			{
+				assert(BC_IS_BC);
+				vm.flags |= BC_FLAG_S;
+				break;
+			}
+
+			case 'w':
+			{
+				assert(BC_IS_BC);
+				vm.flags |= BC_FLAG_W;
+				break;
+			}
+#endif // BC_ENABLED
+
+			case 'V':
+			case 'v':
+			{
+				do_exit = version = true;
+				break;
+			}
+
+#if DC_ENABLED
+			case 'x':
+			{
+				assert(!BC_IS_BC);
+				vm.flags |= DC_FLAG_X;
+				break;
+			}
+#endif // DC_ENABLED
+
+#ifndef NDEBUG
+			// We shouldn't get here because bc_opt_error()/bc_vm_error() should
+			// longjmp() out.
+			case '?':
+			case ':':
+			default:
+			{
+				abort();
+			}
+#endif // NDEBUG
+		}
+	}
+
+	if (version) bc_vm_info(NULL);
+	if (do_exit) exit((int) vm.status);
+	if (vm.exprs.len > 1 || !BC_IS_BC) vm.flags |= BC_FLAG_Q;
+
+	if (opts.optind < (size_t) argc)
+		bc_vec_init(&vm.files, sizeof(char*), NULL);
+
+	for (i = opts.optind; i < (size_t) argc; ++i)
+		bc_vec_push(&vm.files, argv + i);
+}