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1 /* |
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2 * main.c -- binary to C/C++ arrays converter |
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3 * |
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr> |
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5 * |
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6 * Permission to use, copy, modify, and/or distribute this software for any |
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7 * purpose with or without fee is hereby granted, provided that the above |
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8 * copyright notice and this permission notice appear in all copies. |
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9 * |
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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17 */ |
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18 |
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19 #include <errno.h> |
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20 #include <stdarg.h> |
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21 #include <stdbool.h> |
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22 #include <stdio.h> |
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23 #include <stdlib.h> |
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24 #include <stdnoreturn.h> |
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25 #include <string.h> |
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26 #include <unistd.h> |
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27 |
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28 static const char *charset = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_"; |
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29 static char findentchar = '\t'; |
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30 static int findent = 1; |
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31 static bool fconst; |
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32 static bool fnull; |
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33 static bool fstatic; |
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34 static bool funsigned; |
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35 |
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36 noreturn static void |
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37 usage(void) |
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38 { |
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39 fprintf(stderr, "usage: bcc [-0csu] [-I tab-indent] [-i space-indent] input variable\n"); |
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40 exit(1); |
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41 } |
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42 |
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43 noreturn static void |
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44 die(const char *fmt, ...) |
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45 { |
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46 va_list ap; |
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47 |
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48 va_start(ap, fmt); |
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49 fputs("abort: ", stderr); |
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50 vfprintf(stderr, fmt, ap); |
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51 va_end(ap); |
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52 exit(1); |
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53 } |
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54 |
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55 static char * |
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56 mangle(char *variable) |
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57 { |
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58 char *p; |
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59 size_t pos; |
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60 |
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61 /* Remove extension. */ |
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62 if ((p = strrchr(variable, '.'))) |
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63 *p = '\0'; |
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64 |
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65 /* Remove disallowed characters. */ |
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66 while ((pos = strspn(variable, charset)) != strlen(variable)) |
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67 variable[pos] = '_'; |
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68 |
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69 return variable; |
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70 } |
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71 |
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72 static void |
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73 indent(void) |
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74 { |
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75 for (int i = 0; i < findent; ++i) |
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76 putchar(findentchar); |
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77 } |
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78 |
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79 static void |
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80 put(int ch) |
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81 { |
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82 if (funsigned) |
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83 printf("0x%02hhx", (unsigned char)ch); |
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84 else |
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85 printf("%hhd", (signed char)ch); |
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86 } |
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87 |
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88 static void |
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89 process(const char *input, const char *variable) |
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90 { |
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91 FILE *fp; |
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92 int ch, col = 0; |
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93 |
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94 if (strcmp(input, "-") == 0) |
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95 fp = stdin; |
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96 else if (!(fp = fopen(input, "rb"))) |
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97 die("%s: %s\n", input, strerror(errno)); |
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98 |
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99 if (fstatic) |
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100 printf("static "); |
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101 if (fconst) |
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102 printf("const "); |
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103 |
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104 printf(funsigned ? "unsigned " : "signed "); |
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105 printf("char %s[] = {\n", variable); |
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106 |
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107 for (ch = fgetc(fp); ch != EOF; ) { |
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108 if (col == 0) |
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109 indent(); |
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110 |
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111 put(ch); |
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112 |
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113 if ((ch = fgetc(fp)) != EOF || fnull) |
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114 printf(",%s", col < 3 ? " " : ""); |
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115 |
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116 if (++col == 4) { |
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117 col = 0; |
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118 putchar('\n'); |
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119 } |
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120 |
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121 /* Add final '\0' if required. */ |
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122 if (ch == EOF && fnull) { |
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123 if (col++ == 0) |
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124 indent(); |
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125 |
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126 put(0); |
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127 } |
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128 } |
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129 |
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130 if (col != 0) |
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131 printf("\n"); |
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132 |
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133 puts("};"); |
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134 fclose(fp); |
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135 } |
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136 |
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137 int |
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138 main(int argc, char **argv) |
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139 { |
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140 int ch; |
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141 |
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142 while ((ch = getopt(argc, argv, "0cI:i:su")) != -1) { |
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143 switch (ch) { |
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144 case '0': |
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145 fnull = true; |
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146 break; |
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147 case 'c': |
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148 fconst = true; |
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149 break; |
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150 case 'I': |
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151 findentchar = '\t'; |
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152 findent = atoi(optarg); |
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153 break; |
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154 case 'i': |
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155 findentchar = ' '; |
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156 findent = atoi(optarg); |
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157 break; |
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158 case 's': |
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159 fstatic = true; |
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160 break; |
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161 case 'u': |
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162 funsigned = true; |
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163 break; |
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164 default: |
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165 break; |
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166 } |
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167 } |
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168 |
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169 argc -= optind; |
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170 argv += optind; |
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171 |
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172 if (argc < 2) |
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173 usage(); |
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174 |
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175 process(argv[0], mangle(argv[1])); |
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176 } |
