1 | #include <stdio.h>
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2 | #include <stdlib.h>
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3 | #include <string.h>
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4 | #include <mruby.h>
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5 | #include <mruby/irep.h>
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6 | #include <mruby/dump.h>
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7 |
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8 | struct strip_args {
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9 | int argc_start;
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10 | int argc;
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11 | char **argv;
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12 | mrb_bool lvar;
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13 | };
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14 |
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15 |
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16 | static void
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17 | irep_remove_lv(mrb_state *mrb, mrb_irep *irep)
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18 | {
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19 | size_t i;
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20 |
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21 | if (irep->lv) {
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22 | mrb_free(mrb, irep->lv);
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23 | irep->lv = NULL;
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24 | }
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25 |
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26 | for (i = 0; i < irep->rlen; ++i) {
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27 | irep_remove_lv(mrb, irep->reps[i]);
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28 | }
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29 | }
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30 |
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31 | static void
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32 | print_usage(const char *f)
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33 | {
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34 | printf("Usage: %s [switches] irepfiles\n", f);
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35 | printf("switches:\n");
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36 | printf(" -l, --lvar remove LVAR section too.\n");
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37 | }
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38 |
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39 | static int
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40 | parse_args(int argc, char **argv, struct strip_args *args)
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41 | {
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42 | int i;
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43 |
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44 | args->argc_start = 0;
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45 | args->argc = argc;
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46 | args->argv = argv;
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47 | args->lvar = FALSE;
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48 |
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49 | for (i = 1; i < argc; ++i) {
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50 | const size_t len = strlen(argv[i]);
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51 | if (len >= 2 && argv[i][0] == '-') {
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52 | switch (argv[i][1]) {
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53 | case 'l':
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54 | args->lvar = TRUE;
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55 | break;
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56 | case '-':
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57 | if (strncmp((*argv) + 2, "lvar", len) == 0) {
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58 | args->lvar = TRUE;
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59 | break;
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60 | }
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61 | default:
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62 | return -1;
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63 | }
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64 | }
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65 | else {
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66 | break;
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67 | }
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68 | }
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69 |
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70 | args->argc_start = i;
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71 | return i;
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72 | }
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73 |
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74 | static int
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75 | strip(mrb_state *mrb, struct strip_args *args)
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76 | {
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77 | int i;
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78 |
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79 | for (i = args->argc_start; i < args->argc; ++i) {
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80 | char *filename;
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81 | FILE *rfile;
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82 | mrb_irep *irep;
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83 | FILE *wfile;
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84 | int dump_result;
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85 |
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86 | filename = args->argv[i];
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87 | rfile = fopen(filename, "rb");
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88 | if (rfile == NULL) {
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89 | fprintf(stderr, "can't open file for reading %s\n", filename);
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90 | return EXIT_FAILURE;
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91 | }
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92 |
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93 | irep = mrb_read_irep_file(mrb, rfile);
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94 | fclose(rfile);
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95 | if (irep == NULL) {
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96 | fprintf(stderr, "can't read irep file %s\n", filename);
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97 | return EXIT_FAILURE;
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98 | }
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99 |
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100 | /* clear lv if --lvar is enabled */
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101 | if (args->lvar) {
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102 | irep_remove_lv(mrb, irep);
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103 | }
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104 |
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105 | wfile = fopen(filename, "wb");
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106 | if (wfile == NULL) {
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107 | fprintf(stderr, "can't open file for writing %s\n", filename);
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108 | mrb_irep_decref(mrb, irep);
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109 | return EXIT_FAILURE;
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110 | }
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111 |
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112 | /* debug flag must always be false */
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113 | dump_result = mrb_dump_irep_binary(mrb, irep, FALSE, wfile);
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114 |
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115 | fclose(wfile);
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116 | mrb_irep_decref(mrb, irep);
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117 |
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118 | if (dump_result != MRB_DUMP_OK) {
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119 | fprintf(stderr, "error occurred during dumping %s\n", filename);
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120 | return EXIT_FAILURE;
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121 | }
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122 | }
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123 | return EXIT_SUCCESS;
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124 | }
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125 |
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126 | int
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127 | main(int argc, char **argv)
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128 | {
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129 | struct strip_args args;
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130 | int args_result;
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131 | mrb_state *mrb;
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132 | int ret;
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133 |
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134 | if (argc <= 1) {
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135 | printf("no files to strip\n");
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136 | print_usage(argv[0]);
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137 | return EXIT_FAILURE;
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138 | }
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139 |
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140 | args_result = parse_args(argc, argv, &args);
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141 | if (args_result < 0) {
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142 | print_usage(argv[0]);
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143 | return EXIT_FAILURE;
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144 | }
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145 | mrb = mrb_open_core(mrb_default_allocf, NULL);
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146 | if (mrb == NULL) {
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147 | fputs("Invalid mrb_state, exiting mruby-strip\n", stderr);
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148 | return EXIT_FAILURE;
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149 | }
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150 |
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151 | ret = strip(mrb, &args);
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152 |
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153 | mrb_close(mrb);
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154 | return ret;
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155 | }
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