1 | #include <mruby.h>
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2 |
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3 | #ifdef MRB_DISABLE_STDIO
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4 | # error mruby-bin-mruby conflicts 'MRB_DISABLE_STDIO' configuration in your 'build_config.rb'
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5 | #endif
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6 |
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7 | #include <stdlib.h>
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8 | #include <string.h>
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9 | #include <mruby/array.h>
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10 | #include <mruby/compile.h>
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11 | #include <mruby/dump.h>
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12 | #include <mruby/variable.h>
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13 |
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14 | struct _args {
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15 | FILE *rfp;
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16 | char *cmdline;
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17 | mrb_bool fname : 1;
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18 | mrb_bool mrbfile : 1;
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19 | mrb_bool check_syntax : 1;
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20 | mrb_bool verbose : 1;
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21 | mrb_bool version : 1;
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22 | mrb_bool debug : 1;
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23 | int argc;
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24 | char **argv;
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25 | int libc;
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26 | char **libv;
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27 | };
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28 |
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29 | struct options {
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30 | int argc;
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31 | char **argv;
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32 | char *program;
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33 | char *opt;
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34 | char short_opt[2];
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35 | };
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36 |
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37 | static void
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38 | usage(const char *name)
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39 | {
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40 | static const char *const usage_msg[] = {
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41 | "switches:",
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42 | "-b load and execute RiteBinary (mrb) file",
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43 | "-c check syntax only",
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44 | "-d set debugging flags (set $DEBUG to true)",
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45 | "-e 'command' one line of script",
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46 | "-r library load the library before executing your script",
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47 | "-v print version number, then run in verbose mode",
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48 | "--verbose run in verbose mode",
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49 | "--version print the version",
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50 | "--copyright print the copyright",
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51 | NULL
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52 | };
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53 | const char *const *p = usage_msg;
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54 |
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55 | printf("Usage: %s [switches] [programfile] [arguments]\n", name);
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56 | while (*p)
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57 | printf(" %s\n", *p++);
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58 | }
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59 |
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60 | static void
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61 | options_init(struct options *opts, int argc, char **argv)
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62 | {
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63 | opts->argc = argc;
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64 | opts->argv = argv;
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65 | opts->program = *argv;
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66 | *opts->short_opt = 0;
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67 | }
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68 |
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69 | static const char *
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70 | options_opt(struct options *opts)
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71 | {
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72 | /* concatenated short options (e.g. `-cv`) */
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73 | if (*opts->short_opt && *++opts->opt) {
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74 | short_opt:
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75 | opts->short_opt[0] = *opts->opt;
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76 | opts->short_opt[1] = 0;
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77 | return opts->short_opt;
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78 | }
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79 |
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80 | while (++opts->argv, --opts->argc) {
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81 | opts->opt = *opts->argv;
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82 |
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83 | /* empty || not start with `-` || `-` */
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84 | if (!opts->opt[0] || opts->opt[0] != '-' || !opts->opt[1]) return NULL;
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85 |
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86 | if (opts->opt[1] == '-') {
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87 | /* `--` */
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88 | if (!opts->opt[2]) {
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89 | ++opts->argv, --opts->argc;
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90 | return NULL;
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91 | }
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92 | /* long option */
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93 | opts->opt += 2;
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94 | *opts->short_opt = 0;
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95 | return opts->opt;
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96 | }
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97 | else {
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98 | /* short option */
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99 | ++opts->opt;
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100 | goto short_opt;
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101 | }
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102 | }
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103 | return NULL;
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104 | }
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105 |
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106 | static const char *
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107 | options_arg(struct options *opts)
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108 | {
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109 | if (*opts->short_opt && opts->opt[1]) {
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110 | /* concatenated short option and option argument (e.g. `-rLIBRARY`) */
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111 | *opts->short_opt = 0;
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112 | return opts->opt + 1;
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113 | }
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114 | --opts->argc, ++opts->argv;
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115 | return opts->argc ? *opts->argv : NULL;
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116 | }
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117 |
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118 | static char *
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119 | dup_arg_item(mrb_state *mrb, const char *item)
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120 | {
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121 | size_t buflen = strlen(item) + 1;
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122 | char *buf = (char*)mrb_malloc(mrb, buflen);
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123 | memcpy(buf, item, buflen);
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124 | return buf;
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125 | }
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126 |
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127 | static int
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128 | parse_args(mrb_state *mrb, int argc, char **argv, struct _args *args)
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129 | {
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130 | static const struct _args args_zero = { 0 };
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131 | struct options opts[1];
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132 | const char *opt, *item;
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133 |
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134 | *args = args_zero;
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135 | options_init(opts, argc, argv);
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136 | while ((opt = options_opt(opts))) {
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137 | if (strcmp(opt, "b") == 0) {
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138 | args->mrbfile = TRUE;
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139 | }
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140 | else if (strcmp(opt, "c") == 0) {
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141 | args->check_syntax = TRUE;
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142 | }
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143 | else if (strcmp(opt, "d") == 0) {
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144 | args->debug = TRUE;
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145 | }
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146 | else if (strcmp(opt, "e") == 0) {
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147 | if ((item = options_arg(opts))) {
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148 | if (!args->cmdline) {
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149 | args->cmdline = dup_arg_item(mrb, item);
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150 | }
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151 | else {
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152 | size_t cmdlinelen;
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153 | size_t itemlen;
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154 |
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155 | cmdlinelen = strlen(args->cmdline);
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156 | itemlen = strlen(item);
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157 | args->cmdline =
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158 | (char *)mrb_realloc(mrb, args->cmdline, cmdlinelen + itemlen + 2);
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159 | args->cmdline[cmdlinelen] = '\n';
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160 | memcpy(args->cmdline + cmdlinelen + 1, item, itemlen + 1);
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161 | }
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162 | }
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163 | else {
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164 | fprintf(stderr, "%s: No code specified for -e\n", opts->program);
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165 | return EXIT_FAILURE;
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166 | }
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167 | }
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168 | else if (strcmp(opt, "h") == 0) {
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169 | usage(opts->program);
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170 | exit(EXIT_SUCCESS);
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171 | }
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172 | else if (strcmp(opt, "r") == 0) {
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173 | if ((item = options_arg(opts))) {
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174 | if (args->libc == 0) {
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175 | args->libv = (char**)mrb_malloc(mrb, sizeof(char*));
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176 | }
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177 | else {
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178 | args->libv = (char**)mrb_realloc(mrb, args->libv, sizeof(char*) * (args->libc + 1));
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179 | }
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180 | args->libv[args->libc++] = dup_arg_item(mrb, item);
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181 | }
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182 | else {
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183 | fprintf(stderr, "%s: No library specified for -r\n", opts->program);
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184 | return EXIT_FAILURE;
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185 | }
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186 | }
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187 | else if (strcmp(opt, "v") == 0) {
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188 | if (!args->verbose) {
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189 | mrb_show_version(mrb);
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190 | args->version = TRUE;
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191 | }
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192 | args->verbose = TRUE;
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193 | }
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194 | else if (strcmp(opt, "version") == 0) {
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195 | mrb_show_version(mrb);
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196 | exit(EXIT_SUCCESS);
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197 | }
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198 | else if (strcmp(opt, "verbose") == 0) {
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199 | args->verbose = TRUE;
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200 | }
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201 | else if (strcmp(opt, "copyright") == 0) {
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202 | mrb_show_copyright(mrb);
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203 | exit(EXIT_SUCCESS);
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204 | }
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205 | else {
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206 | fprintf(stderr, "%s: invalid option %s%s (-h will show valid options)\n",
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207 | opts->program, opt[1] ? "--" : "-", opt);
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208 | return EXIT_FAILURE;
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209 | }
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210 | }
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211 |
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212 | argc = opts->argc; argv = opts->argv;
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213 | if (args->cmdline == NULL) {
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214 | if (*argv == NULL) {
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215 | if (args->version) exit(EXIT_SUCCESS);
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216 | args->rfp = stdin;
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217 | }
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218 | else {
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219 | args->rfp = strcmp(argv[0], "-") == 0 ?
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220 | stdin : fopen(argv[0], args->mrbfile ? "rb" : "r");
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221 | if (args->rfp == NULL) {
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222 | fprintf(stderr, "%s: Cannot open program file: %s\n", opts->program, argv[0]);
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223 | return EXIT_FAILURE;
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224 | }
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225 | args->fname = TRUE;
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226 | args->cmdline = argv[0];
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227 | argc--; argv++;
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228 | }
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229 | }
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230 | args->argv = (char **)mrb_realloc(mrb, args->argv, sizeof(char*) * (argc + 1));
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231 | memcpy(args->argv, argv, (argc+1) * sizeof(char*));
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232 | args->argc = argc;
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233 |
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234 | return EXIT_SUCCESS;
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235 | }
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236 |
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237 | static void
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238 | cleanup(mrb_state *mrb, struct _args *args)
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239 | {
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240 | if (args->rfp && args->rfp != stdin)
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241 | fclose(args->rfp);
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242 | if (!args->fname)
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243 | mrb_free(mrb, args->cmdline);
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244 | mrb_free(mrb, args->argv);
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245 | if (args->libc) {
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246 | while (args->libc--) {
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247 | mrb_free(mrb, args->libv[args->libc]);
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248 | }
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249 | mrb_free(mrb, args->libv);
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250 | }
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251 | mrb_close(mrb);
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252 | }
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253 |
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254 | int
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255 | main(int argc, char **argv)
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256 | {
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257 | mrb_state *mrb = mrb_open();
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258 | int n = -1;
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259 | int i;
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260 | struct _args args;
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261 | mrb_value ARGV;
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262 | mrbc_context *c;
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263 | mrb_value v;
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264 | mrb_sym zero_sym;
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265 |
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266 | if (mrb == NULL) {
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267 | fprintf(stderr, "%s: Invalid mrb_state, exiting mruby\n", *argv);
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268 | return EXIT_FAILURE;
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269 | }
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270 |
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271 | n = parse_args(mrb, argc, argv, &args);
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272 | if (n == EXIT_FAILURE || (args.cmdline == NULL && args.rfp == NULL)) {
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273 | cleanup(mrb, &args);
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274 | return n;
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275 | }
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276 | else {
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277 | int ai = mrb_gc_arena_save(mrb);
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278 | ARGV = mrb_ary_new_capa(mrb, args.argc);
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279 | for (i = 0; i < args.argc; i++) {
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280 | char* utf8 = mrb_utf8_from_locale(args.argv[i], -1);
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281 | if (utf8) {
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282 | mrb_ary_push(mrb, ARGV, mrb_str_new_cstr(mrb, utf8));
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283 | mrb_utf8_free(utf8);
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284 | }
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285 | }
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286 | mrb_define_global_const(mrb, "ARGV", ARGV);
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287 | mrb_gv_set(mrb, mrb_intern_lit(mrb, "$DEBUG"), mrb_bool_value(args.debug));
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288 |
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289 | c = mrbc_context_new(mrb);
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290 | if (args.verbose)
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291 | c->dump_result = TRUE;
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292 | if (args.check_syntax)
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293 | c->no_exec = TRUE;
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294 |
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295 | /* Set $0 */
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296 | zero_sym = mrb_intern_lit(mrb, "$0");
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297 | if (args.rfp) {
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298 | const char *cmdline;
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299 | cmdline = args.cmdline ? args.cmdline : "-";
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300 | mrbc_filename(mrb, c, cmdline);
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301 | mrb_gv_set(mrb, zero_sym, mrb_str_new_cstr(mrb, cmdline));
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302 | }
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303 | else {
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304 | mrbc_filename(mrb, c, "-e");
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305 | mrb_gv_set(mrb, zero_sym, mrb_str_new_lit(mrb, "-e"));
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306 | }
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307 |
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308 | /* Load libraries */
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309 | for (i = 0; i < args.libc; i++) {
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310 | FILE *lfp = fopen(args.libv[i], args.mrbfile ? "rb" : "r");
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311 | if (lfp == NULL) {
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312 | fprintf(stderr, "%s: Cannot open library file: %s\n", *argv, args.libv[i]);
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313 | mrbc_context_free(mrb, c);
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314 | cleanup(mrb, &args);
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315 | return EXIT_FAILURE;
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316 | }
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317 | if (args.mrbfile) {
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318 | v = mrb_load_irep_file_cxt(mrb, lfp, c);
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319 | }
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320 | else {
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321 | v = mrb_load_file_cxt(mrb, lfp, c);
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322 | }
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323 | fclose(lfp);
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324 | }
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325 |
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326 | /* Load program */
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327 | if (args.mrbfile) {
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328 | v = mrb_load_irep_file_cxt(mrb, args.rfp, c);
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329 | }
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330 | else if (args.rfp) {
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331 | v = mrb_load_file_cxt(mrb, args.rfp, c);
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332 | }
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333 | else {
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334 | char* utf8 = mrb_utf8_from_locale(args.cmdline, -1);
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335 | if (!utf8) abort();
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336 | v = mrb_load_string_cxt(mrb, utf8, c);
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337 | mrb_utf8_free(utf8);
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338 | }
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339 |
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340 | mrb_gc_arena_restore(mrb, ai);
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341 | mrbc_context_free(mrb, c);
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342 | if (mrb->exc) {
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343 | if (!mrb_undef_p(v)) {
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344 | mrb_print_error(mrb);
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345 | }
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346 | n = EXIT_FAILURE;
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347 | }
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348 | else if (args.check_syntax) {
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349 | puts("Syntax OK");
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350 | }
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351 | }
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352 | cleanup(mrb, &args);
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353 |
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354 | return n;
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355 | }
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