1 | #include "parseargs.hfa" |
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2 | |
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3 | #include <stdint.h> |
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4 | #include <string.h> |
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5 | #include <errno.h> |
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6 | #include <unistd.h> |
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7 | extern "C" { |
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8 | #include <getopt.h> |
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9 | #include <sys/ioctl.h> |
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10 | |
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11 | struct FILE; |
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12 | extern FILE * stderr; |
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13 | extern FILE * stdout; |
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14 | |
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15 | extern int fileno(FILE *stream); |
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16 | |
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17 | extern int fprintf ( FILE * stream, const char * format, ... ); |
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18 | |
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19 | extern long long int strtoll (const char* str, char** endptr, int base); |
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20 | extern unsigned long long int strtoull(const char* str, char** endptr, int base); |
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21 | } |
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22 | |
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23 | #include "common.hfa" |
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24 | #include "limits.hfa" |
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25 | |
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26 | extern int cfa_args_argc; |
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27 | extern char ** cfa_args_argv; |
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28 | extern char ** cfa_args_envp; |
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29 | |
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30 | void printopt(FILE * out, int width, int max, char sn, const char * ln, const char * help) { |
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31 | int hwidth = max - (11 + width); |
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32 | if(hwidth <= 0) hwidth = max; |
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33 | |
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34 | fprintf(out, " -%c, --%-*s %.*s\n", sn, width, ln, hwidth, help); |
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35 | for() { |
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36 | help += min(strlen(help), hwidth); |
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37 | if('\0' == *help) break; |
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38 | fprintf(out, "%*s%.*s\n", width + 11, "", hwidth, help); |
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39 | } |
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40 | } |
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41 | |
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42 | void parse_args( cfa_option options[], size_t opt_count, const char * usage, char ** & left ) { |
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43 | parse_args(cfa_args_argc, cfa_args_argv, options, opt_count, usage, left ); |
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44 | } |
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45 | |
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46 | void parse_args( |
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47 | int argc, |
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48 | char * argv[], |
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49 | cfa_option options[], |
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50 | size_t opt_count, |
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51 | const char * usage, |
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52 | char ** & left |
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53 | ) { |
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54 | struct option optarr[opt_count + 2]; |
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55 | int width = 0; |
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56 | int max_width = 1_000_000; |
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57 | { |
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58 | int idx = 0; |
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59 | for(i; opt_count) { |
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60 | if(options[i].long_name) { |
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61 | optarr[idx].name = options[i].long_name; |
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62 | optarr[idx].flag = 0p; |
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63 | optarr[idx].val = options[i].short_name; |
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64 | if( ((intptr_t)options[i].parse) == ((intptr_t)parse_settrue) |
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65 | || ((intptr_t)options[i].parse) == ((intptr_t)parse_setfalse) ) { |
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66 | optarr[idx].has_arg = no_argument; |
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67 | } else { |
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68 | optarr[idx].has_arg = required_argument; |
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69 | } |
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70 | idx++; |
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71 | |
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72 | int w = strlen(options[i].long_name); |
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73 | if(w > width) width = w; |
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74 | } |
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75 | } |
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76 | optarr[idx+0].[name, has_arg, flag, val] = ["help", no_argument, 0, 'h']; |
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77 | optarr[idx+1].[name, has_arg, flag, val] = [0, no_argument, 0, 0]; |
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78 | } |
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79 | |
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80 | char optstring[opt_count * 3] = { '\0' }; |
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81 | { |
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82 | int idx = 0; |
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83 | for(i; opt_count) { |
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84 | optstring[idx] = options[i].short_name; |
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85 | idx++; |
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86 | if( ((intptr_t)options[i].parse) != ((intptr_t)parse_settrue) |
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87 | && ((intptr_t)options[i].parse) != ((intptr_t)parse_setfalse) ) { |
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88 | optstring[idx] = ':'; |
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89 | idx++; |
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90 | } |
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91 | } |
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92 | optstring[idx+0] = 'h'; |
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93 | optstring[idx+1] = '\0'; |
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94 | } |
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95 | |
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96 | FILE * out = stderr; |
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97 | NEXT_ARG: |
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98 | for() { |
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99 | int idx = 0; |
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100 | int opt = getopt_long(argc, argv, optstring, optarr, &idx); |
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101 | switch(opt) { |
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102 | case -1: |
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103 | if(&left != 0p) left = argv + optind; |
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104 | return; |
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105 | case 'h': |
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106 | out = stdout; |
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107 | case '?': |
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108 | goto USAGE; |
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109 | default: |
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110 | for(i; opt_count) { |
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111 | if(opt == options[i].short_name) { |
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112 | const char * arg = optarg ? optarg : ""; |
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113 | bool success = options[i].parse( arg, options[i].variable ); |
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114 | if(success) continue NEXT_ARG; |
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115 | |
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116 | fprintf(out, "Argument '%s' for option %c could not be parsed\n\n", arg, (char)opt); |
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117 | goto USAGE; |
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118 | } |
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119 | } |
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120 | abort("Internal parse arg error\n"); |
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121 | } |
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122 | |
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123 | } |
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124 | |
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125 | USAGE:; |
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126 | int outfd = fileno(out); |
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127 | if(isatty(outfd)) { |
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128 | struct winsize size; |
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129 | int ret = ioctl(outfd, TIOCGWINSZ, &size); |
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130 | if(ret < 0) abort( "ioctl error: (%d) %s\n", (int)errno, strerror(errno) ); |
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131 | max_width = size.ws_col; |
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132 | } |
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133 | |
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134 | fprintf(out, "Usage:\n %s %s\n", argv[0], usage); |
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135 | |
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136 | for(i; opt_count) { |
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137 | printopt(out, width, max_width, options[i].short_name, options[i].long_name, options[i].help); |
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138 | } |
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139 | fprintf(out, " -%c, --%-*s %s\n", 'h', width, "help", "print this help message"); |
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140 | exit(out == stdout ? 0 : 1); |
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141 | } |
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142 | |
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143 | bool parse_yesno(const char * arg, bool & value ) { |
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144 | if(strcmp(arg, "yes") == 0) { |
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145 | value = true; |
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146 | return true; |
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147 | } |
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148 | |
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149 | if(strcmp(arg, "no") == 0) { |
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150 | value = false; |
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151 | return true; |
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152 | } |
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153 | |
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154 | return false; |
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155 | } |
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156 | |
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157 | bool parse_settrue (const char *, bool & value ) { |
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158 | value = true; |
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159 | return true; |
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160 | } |
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161 | |
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162 | bool parse_setfalse(const char *, bool & value ) { |
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163 | value = false; |
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164 | return true; |
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165 | } |
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166 | |
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167 | bool parse(const char * arg, const char * & value ) { |
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168 | value = arg; |
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169 | return true; |
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170 | } |
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171 | |
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172 | bool parse(const char * arg, unsigned & value) { |
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173 | char * end; |
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174 | unsigned long long int r = strtoull(arg, &end, 10); |
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175 | if(*end != '\0') return false; |
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176 | if(r > (unsigned)MAX) return false; |
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177 | |
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178 | value = r; |
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179 | return true; |
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180 | } |
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181 | |
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182 | bool parse(const char * arg, unsigned long & value) { |
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183 | char * end; |
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184 | unsigned long long int r = strtoull(arg, &end, 10); |
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185 | if(*end != '\0') return false; |
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186 | if(r > (unsigned long)MAX) return false; |
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187 | |
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188 | value = r; |
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189 | return true; |
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190 | } |
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191 | |
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192 | bool parse(const char * arg, unsigned long long & value) { |
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193 | char * end; |
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194 | unsigned long long int r = strtoull(arg, &end, 10); |
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195 | if(*end != '\0') return false; |
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196 | if(r > (unsigned long long)MAX) return false; |
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197 | |
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198 | value = r; |
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199 | return true; |
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200 | } |
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201 | |
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202 | bool parse(const char * arg, int & value) { |
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203 | char * end; |
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204 | int r = strtoll(arg, &end, 10); |
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205 | if(*end != '\0') return false; |
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206 | |
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207 | value = r; |
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208 | return true; |
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209 | } |
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