1 /* 2 * ***************************************************************************** 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 5 * 6 * Copyright (c) 2018-2023 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 * The entry point for bc. 33 * 34 */ 35 36 #include <assert.h> 37 #include <stdlib.h> 38 #include <string.h> 39 40 #if BC_ENABLE_NLS 41 #include <locale.h> 42 #endif // BC_ENABLE_NLS 43 44 #ifndef _WIN32 45 #include <libgen.h> 46 #endif // _WIN32 47 48 #include <setjmp.h> 49 50 #include <version.h> 51 #include <status.h> 52 #include <vm.h> 53 #include <bc.h> 54 #include <dc.h> 55 56 int 57 main(int argc, char* argv[]) 58 { 59 char* name; 60 size_t len = strlen(BC_EXECPREFIX); 61 62 #if BC_ENABLE_NLS 63 // Must set the locale properly in order to have the right error messages. 64 vm->locale = setlocale(LC_ALL, ""); 65 #endif // BC_ENABLE_NLS 66 67 // Set the start pledge(). 68 bc_pledge(bc_pledge_start, NULL); 69 70 // Sometimes, argv[0] can be NULL. Better make sure to be robust against it. 71 if (argv[0] != NULL) 72 { 73 // Figure out the name of the calculator we are using. We can't use 74 // basename because it's not portable, but yes, this is stripping off 75 // the directory. 76 name = strrchr(argv[0], BC_FILE_SEP); 77 vm->name = (name == NULL) ? argv[0] : name + 1; 78 } 79 else 80 { 81 #if !DC_ENABLED 82 vm->name = "bc"; 83 #elif !BC_ENABLED 84 vm->name = "dc"; 85 #else 86 // Just default to bc in that case. 87 vm->name = "bc"; 88 #endif 89 } 90 91 // If the name is longer than the length of the prefix, skip the prefix. 92 if (strlen(vm->name) > len) vm->name += len; 93 94 BC_SIG_LOCK; 95 96 // We *must* do this here. Otherwise, other code could not jump out all of 97 // the way. 98 bc_vec_init(&vm->jmp_bufs, sizeof(sigjmp_buf), BC_DTOR_NONE); 99 100 BC_SETJMP_LOCKED(vm, exit); 101 102 #if !DC_ENABLED 103 bc_main(argc, argv); 104 #elif !BC_ENABLED 105 dc_main(argc, argv); 106 #else 107 // BC_IS_BC uses vm->name, which was set above. So we're good. 108 if (BC_IS_BC) bc_main(argc, argv); 109 else dc_main(argc, argv); 110 #endif 111 112 exit: 113 BC_SIG_MAYLOCK; 114 115 // Ensure we exit appropriately. 116 return bc_vm_atexit((int) vm->status); 117 } 118