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 * Generates a const array from a bc script. 33 * 34 */ 35 36 #include <stdbool.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 41 #include <errno.h> 42 43 #include <libgen.h> 44 45 static const char* const bc_gen_header = 46 "// Copyright (c) 2018-2021 Gavin D. Howard and contributors.\n" 47 "// Licensed under the 2-clause BSD license.\n" 48 "// *** AUTOMATICALLY GENERATED FROM %s. DO NOT MODIFY. ***\n\n"; 49 50 static const char* const bc_gen_label = "const char *%s = \"%s\";\n\n"; 51 static const char* const bc_gen_label_extern = "extern const char *%s;\n\n"; 52 static const char* const bc_gen_ifdef = "#if %s\n"; 53 static const char* const bc_gen_endif = "#endif // %s\n"; 54 static const char* const bc_gen_name = "const char %s[] = {\n"; 55 static const char* const bc_gen_name_extern = "extern const char %s[];\n\n"; 56 57 #define IO_ERR (1) 58 #define INVALID_INPUT_FILE (2) 59 #define INVALID_PARAMS (3) 60 61 #define MAX_WIDTH (74) 62 63 int main(int argc, char *argv[]) { 64 65 FILE *in, *out; 66 char *label, *define, *name; 67 int c, count, slashes, err = IO_ERR; 68 bool has_label, has_define, remove_tabs; 69 70 if (argc < 5) { 71 printf("usage: %s input output name header [label [define [remove_tabs]]]\n", argv[0]); 72 return INVALID_PARAMS; 73 } 74 75 name = argv[3]; 76 77 has_label = (argc > 4 && strcmp("", argv[4]) != 0); 78 label = has_label ? argv[4] : ""; 79 80 has_define = (argc > 5 && strcmp("", argv[5]) != 0); 81 define = has_define ? argv[5] : ""; 82 83 remove_tabs = (argc > 6); 84 85 in = fopen(argv[1], "r"); 86 if (!in) return INVALID_INPUT_FILE; 87 88 out = fopen(argv[2], "w"); 89 if (!out) goto out_err; 90 91 if (fprintf(out, bc_gen_header, argv[1]) < 0) goto err; 92 if (has_label && fprintf(out, bc_gen_label_extern, label) < 0) goto err; 93 if (fprintf(out, bc_gen_name_extern, name) < 0) goto err; 94 if (has_define && fprintf(out, bc_gen_ifdef, define) < 0) goto err; 95 if (has_label && fprintf(out, bc_gen_label, label, argv[1]) < 0) goto err; 96 if (fprintf(out, bc_gen_name, name) < 0) goto err; 97 98 c = count = slashes = 0; 99 100 while (slashes < 2 && (c = fgetc(in)) >= 0) { 101 slashes += (slashes == 1 && c == '/' && fgetc(in) == '\n'); 102 slashes += (!slashes && c == '/' && fgetc(in) == '*'); 103 } 104 105 if (c < 0) { 106 err = INVALID_INPUT_FILE; 107 goto err; 108 } 109 110 while ((c = fgetc(in)) == '\n'); 111 112 while (c >= 0) { 113 114 int val; 115 116 if (!remove_tabs || c != '\t') { 117 118 if (!count && fputc('\t', out) == EOF) goto err; 119 120 val = fprintf(out, "%d,", c); 121 if (val < 0) goto err; 122 123 count += val; 124 125 if (count > MAX_WIDTH) { 126 count = 0; 127 if (fputc('\n', out) == EOF) goto err; 128 } 129 } 130 131 c = fgetc(in); 132 } 133 134 if (!count && (fputc(' ', out) == EOF || fputc(' ', out) == EOF)) goto err; 135 if (fprintf(out, "0\n};\n") < 0) goto err; 136 137 err = (has_define && fprintf(out, bc_gen_endif, define) < 0); 138 139 err: 140 fclose(out); 141 out_err: 142 fclose(in); 143 return err; 144 } 145