1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2022 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // parseargs.cfa |
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8 | // implementation of arguments parsing (argc, argv) |
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9 | // |
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10 | // Author : Thierry Delisle |
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11 | // Created On : Wed Oct 12 15:28:01 2022 |
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12 | // Last Modified By : Peter A. Buhr |
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13 | // Last Modified On : Mon Jul 8 18:18:23 2024 |
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14 | // Update Count : 7 |
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15 | // |
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16 | |
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17 | #include "parseargs.hfa" |
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18 | |
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19 | #include <assert.h> |
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20 | #include <ctype.h> |
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21 | #include <stdint.h> |
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22 | #include <string.h> |
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23 | #include <errno.h> |
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24 | #include <unistd.h> |
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25 | |
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26 | extern "C" { |
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27 | #include <getopt.h> |
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28 | #include <sys/ioctl.h> |
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29 | |
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30 | struct FILE; |
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31 | extern FILE * stderr; |
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32 | extern FILE * stdout; |
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33 | |
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34 | extern int fileno( FILE *stream ); |
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35 | |
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36 | extern int fprintf ( FILE * stream, const char * format, ... ); |
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37 | |
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38 | extern long long int strtoll ( const char* str, char** endptr, int base ); |
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39 | extern unsigned long long int strtoull( const char* str, char** endptr, int base ); |
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40 | extern double strtod ( const char* str, char** endptr ); |
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41 | } |
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42 | |
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43 | #include "common.hfa" |
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44 | #include "limits.hfa" |
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45 | |
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46 | #pragma GCC visibility push( default ) |
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47 | |
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48 | extern int cfa_args_argc __attribute__(( weak )); |
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49 | extern char ** cfa_args_argv __attribute__(( weak )); |
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50 | extern char ** cfa_args_envp __attribute__(( weak )); |
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51 | |
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52 | forall([N]) |
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53 | static void usage( char * cmd, const array( cfa_option, N ) & options, const char * usage, FILE * out ) __attribute__ (( noreturn )); |
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54 | //----------------------------------------------------------------------------- |
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55 | // checking |
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56 | forall([N]) |
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57 | static void check_args( const array( cfa_option, N ) & options ) { |
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58 | for ( i; N ) { |
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59 | for ( j; N ) { |
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60 | if ( i == j ) continue; |
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61 | |
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62 | if ( options[i].short_name != '\0' |
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63 | && options[i].short_name == options[j].short_name ) |
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64 | abort( "Parse Args error: two options have short name '%c' (%zu & %zu)", options[i].short_name, i, j ); |
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65 | |
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66 | if (0 == strcmp( options[i].long_name, options[j].long_name )) |
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67 | abort( "Parse Args error: two options have long name '%s' (%zu & %zu)", options[i].long_name, i, j ); |
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68 | } |
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69 | } |
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70 | } |
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71 | |
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72 | |
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73 | //----------------------------------------------------------------------------- |
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74 | // Parsing args |
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75 | forall([opt_count]) { |
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76 | void parse_args( const array( cfa_option, opt_count ) & options, const char * usage, char ** & left ) { |
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77 | if ( 0p != &cfa_args_argc ) { |
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78 | parse_args( cfa_args_argc, cfa_args_argv, options, usage, left ); |
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79 | } else { |
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80 | char * temp[1] = { 0p }; |
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81 | parse_args(0, temp, options, usage, left ); |
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82 | } |
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83 | } |
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84 | |
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85 | void parse_args( |
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86 | int argc, |
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87 | char * argv[], |
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88 | const array( cfa_option, opt_count ) & options, |
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89 | const char * usage, |
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90 | char ** & left |
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91 | ) { |
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92 | check_args( options ); |
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93 | |
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94 | int maxv = 'h'; |
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95 | char optstring[(opt_count * 3) + 2] = { '\0' }; |
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96 | { |
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97 | int idx = 0; |
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98 | for ( i; opt_count ) { |
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99 | if ( options[i].short_name ) { |
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100 | maxv = max( options[i].short_name, maxv ); |
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101 | optstring[idx] = options[i].short_name; |
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102 | idx++; |
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103 | if ( (intptr_t)options[i].parse != (intptr_t)parse_settrue |
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104 | && ((intptr_t)options[i].parse) != ((intptr_t)parse_setfalse) ) { |
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105 | optstring[idx] = ':'; |
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106 | idx++; |
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107 | } |
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108 | } |
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109 | } |
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110 | optstring[idx+0] = 'h'; |
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111 | optstring[idx+1] = '\0'; |
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112 | } |
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113 | |
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114 | struct option optarr[opt_count + 2]; |
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115 | { |
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116 | int idx = 0; |
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117 | for ( i; opt_count ) { |
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118 | if ( options[i].long_name ) { |
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119 | // we don't have the mutable keyword here, which is really what we would want |
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120 | int & val_ref = (int &)(const int &)options[i].val; |
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121 | val_ref = (options[i].short_name != '\0') ? ((int)options[i].short_name) : ++maxv; |
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122 | |
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123 | optarr[idx].name = options[i].long_name; |
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124 | optarr[idx].flag = 0p; |
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125 | optarr[idx].val = options[i].val; |
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126 | if ( ((intptr_t)options[i].parse) == ((intptr_t)parse_settrue) |
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127 | || ((intptr_t)options[i].parse) == ((intptr_t)parse_setfalse) ) { |
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128 | optarr[idx].has_arg = no_argument; |
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129 | } else { |
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130 | optarr[idx].has_arg = required_argument; |
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131 | } |
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132 | idx++; |
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133 | } |
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134 | } |
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135 | optarr[idx+0].[name, has_arg, flag, val] = ["help", no_argument, 0, 'h']; |
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136 | optarr[idx+1].[name, has_arg, flag, val] = [0, no_argument, 0, 0]; |
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137 | } |
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138 | |
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139 | FILE * out = stderr; |
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140 | NEXT_ARG: |
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141 | for () { |
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142 | int idx = 0; |
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143 | int opt = getopt_long( argc, argv, optstring, optarr, &idx ); |
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144 | switch( opt ) { |
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145 | case -1: |
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146 | if ( &left != 0p ) left = argv + optind; |
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147 | return; |
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148 | case 'h': |
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149 | out = stdout; |
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150 | case '?': |
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151 | usage( argv[0], options, usage, out ); |
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152 | default: |
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153 | for ( i; opt_count ) { |
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154 | if ( opt == options[i].val ) { |
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155 | const char * arg = optarg ? optarg : ""; |
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156 | if ( arg[0] == '=' ) { arg++; } |
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157 | // work around for some weird bug |
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158 | void * variable = options[i].variable; |
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159 | bool (*parse_func)(const char *, void * ) = options[i].parse; |
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160 | bool success = parse_func( arg, variable ); |
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161 | if ( success ) continue NEXT_ARG; |
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162 | |
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163 | fprintf( out, "Argument '%s' for option %c could not be parsed\n\n", arg, (char)opt ); |
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164 | usage( argv[0], options, usage, out ); |
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165 | } |
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166 | } |
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167 | abort( "Internal parse arg error\n" ); |
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168 | } |
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169 | |
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170 | } |
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171 | } |
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172 | } |
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173 | |
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174 | static inline int next_newline( const char * str ) { |
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175 | int ret; |
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176 | const char * ptr = strstr( str, "\n" ); |
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177 | if ( ! ptr ) return MAX; |
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178 | |
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179 | /* paranoid */ verify( str <= ptr ); |
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180 | intptr_t low = (intptr_t)str; |
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181 | intptr_t hi = (intptr_t)ptr; |
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182 | ret = hi - low; |
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183 | |
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184 | return ret; |
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185 | } |
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186 | |
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187 | //----------------------------------------------------------------------------- |
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188 | // Print usage |
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189 | static void printopt( FILE * out, int width, int max, char sn, const char * ln, const char * help ) { |
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190 | // check how wide we should be printing |
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191 | // this includes all options and the help message |
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192 | int hwidth = max - (11 + width); |
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193 | if ( hwidth <= 0 ) hwidth = max; |
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194 | |
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195 | // check which pieces we have |
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196 | bool has_ln = ln && strcmp( "", ln ); |
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197 | bool has_help = help && strcmp( "", help ); |
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198 | |
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199 | // print the small name if present |
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200 | if ( sn != '\0') fprintf( out, " -%c", sn ); |
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201 | else fprintf( out, " " ); |
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202 | |
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203 | // print a comma if we have both short and long names |
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204 | if ( sn != '\0' && has_ln ) fprintf( out, ", " ); |
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205 | else fprintf( out, " " ); |
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206 | |
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207 | // print the long name if present |
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208 | if ( has_ln ) fprintf( out, "--%-*s", width, ln ); |
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209 | else if ( has_help ) fprintf( out, " %-*s", width, "" ); |
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210 | |
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211 | if ( has_help ) { |
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212 | // print the help |
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213 | // We need to wrap at the max width, and also indent newlines so everything is nice and pretty |
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214 | |
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215 | // for each line to print |
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216 | for () { |
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217 | //find out if there is a newline |
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218 | int nextnl = next_newline( help ); |
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219 | int real = min( min( strlen( help ), hwidth ), nextnl ); |
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220 | |
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221 | fprintf( out, " %.*s", real, help ); |
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222 | // printf( "%d %d\n", real, nextnl ); |
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223 | help += real; |
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224 | if ( nextnl == real ) help++; |
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225 | if ('\0' == *help ) break; |
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226 | fprintf( out, "\n%*s", width + 8, "" ); |
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227 | } |
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228 | } |
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229 | fprintf( out, "\n" ); |
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230 | } |
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231 | |
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232 | void print_args_usage( cfa_option options[], const size_t opt_count, const char * usage, bool error ) __attribute__ ((noreturn )) { |
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233 | const array( cfa_option, opt_count ) & arr = (const array( cfa_option, opt_count ) &) *options; |
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234 | usage( cfa_args_argv[0], arr, usage, error ? stderr : stdout ); |
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235 | } |
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236 | |
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237 | void print_args_usage( int , char * argv[], cfa_option options[], const size_t opt_count, const char * usage, bool error ) __attribute__ (( noreturn )) { |
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238 | const array( cfa_option, opt_count ) & arr = (const array( cfa_option, opt_count ) &) *options; |
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239 | usage( argv[0], arr, usage, error ? stderr : stdout ); |
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240 | } |
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241 | |
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242 | forall( [N] ) { |
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243 | void print_args_usage( const array(cfa_option, N ) & options, const char * usage, bool error ) { |
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244 | usage( cfa_args_argv[0], options, usage, error ? stderr : stdout ); |
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245 | } |
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246 | |
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247 | void print_args_usage( int argc, char * argv[], const array( cfa_option, N ) & options, const char * usage, bool error ) { |
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248 | usage( argv[0], options, usage, error ? stderr : stdout ); |
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249 | } |
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250 | } |
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251 | |
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252 | forall([N]) |
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253 | static void usage( char * cmd, const array( cfa_option, N ) & options, const char * help, FILE * out ) __attribute__(( noreturn )) { |
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254 | int width = 0; |
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255 | { |
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256 | for ( i; N ) { |
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257 | if ( options[i].long_name ) { |
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258 | int w = strlen( options[i].long_name ); |
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259 | if ( w > width ) width = w; |
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260 | } |
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261 | } |
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262 | } |
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263 | |
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264 | int max_width = 1_000_000; |
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265 | int outfd = fileno( out ); |
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266 | if ( isatty( outfd ) ) { |
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267 | struct winsize size; |
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268 | int ret = ioctl( outfd, TIOCGWINSZ, &size ); |
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269 | if ( ret < 0 ) abort( "ioctl error: (%d) %s\n", (int)errno, strerror( errno) ); |
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270 | max_width = size.ws_col; |
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271 | } |
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272 | |
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273 | fprintf( out, "Usage:\n %s %s\n", cmd, help ); |
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274 | |
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275 | for ( i; N ) { |
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276 | printopt( out, width, max_width, options[i].short_name, options[i].long_name, options[i].help ); |
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277 | } |
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278 | fprintf( out, " -%c, --%-*s %s\n", 'h', width, "help", "print this help message" ); |
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279 | exit( out == stdout ? 0 : 1 ); |
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280 | } |
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281 | |
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282 | //----------------------------------------------------------------------------- |
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283 | // Typed argument parsing |
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284 | bool parse_yesno( const char * arg, bool & value ) { |
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285 | if ( strcmp( arg, "yes" ) == 0 ) { |
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286 | value = true; |
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287 | return true; |
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288 | } |
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289 | if ( strcmp( arg, "Y" ) == 0 ) { |
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290 | value = true; |
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291 | return true; |
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292 | } |
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293 | if ( strcmp( arg, "y" ) == 0 ) { |
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294 | value = true; |
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295 | return true; |
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296 | } |
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297 | if ( strcmp( arg, "no" ) == 0 ) { |
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298 | value = false; |
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299 | return true; |
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300 | } |
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301 | if ( strcmp( arg, "N" ) == 0 ) { |
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302 | value = false; |
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303 | return true; |
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304 | } |
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305 | if ( strcmp( arg, "n" ) == 0 ) { |
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306 | value = false; |
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307 | return true; |
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308 | } |
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309 | return false; |
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310 | } |
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311 | |
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312 | bool parse_truefalse( const char * arg, bool & value ) { |
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313 | if ( strcmp( arg, "true" ) == 0 ) { |
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314 | value = true; |
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315 | return true; |
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316 | } |
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317 | if ( strcmp( arg, "false" ) == 0 ) { |
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318 | value = false; |
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319 | return true; |
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320 | } |
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321 | return false; |
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322 | } |
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323 | |
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324 | bool parse_settrue ( const char *, bool & value ) { |
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325 | value = true; |
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326 | return true; |
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327 | } |
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328 | |
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329 | bool parse_setfalse( const char *, bool & value ) { |
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330 | value = false; |
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331 | return true; |
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332 | } |
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333 | |
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334 | bool parse( const char * arg, const char * & value ) { |
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335 | value = arg; |
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336 | return true; |
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337 | } |
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338 | |
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339 | bool parse( const char * arg, int & value ) { |
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340 | char * end; |
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341 | |
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342 | errno = 0; |
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343 | long long int r = strtoll( arg, &end, 0 ); |
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344 | if ( errno ) return false; |
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345 | if (*end != '\0') return false; |
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346 | if ( r > (int)MAX ) return false; |
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347 | if ( r < (int)MIN ) return false; |
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348 | value = r; |
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349 | return true; |
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350 | } |
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351 | |
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352 | static unsigned long long int strict_strtoull( const char * arg, int base ) { |
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353 | errno = 0; |
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354 | { |
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355 | const char * in = arg; |
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356 | for () { |
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357 | if ( '\0' == *in ) { |
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358 | errno = EINVAL; |
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359 | return 0; |
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360 | } |
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361 | if ( ! isspace(*in )) break; |
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362 | in++; |
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363 | } |
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364 | if ( ! isdigit(*in )) { |
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365 | errno = EINVAL; |
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366 | return 0; |
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367 | } |
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368 | } |
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369 | *char end; |
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370 | unsigned long long int r = strtoull( arg, &end, base ); |
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371 | if (*end != '\0') errno = EINVAL; |
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372 | if ( errno ) return 0; |
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373 | return r; |
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374 | } |
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375 | |
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376 | bool parse( const char * arg, unsigned & value ) { |
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377 | unsigned long long int r = strict_strtoull( arg, 0 ); |
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378 | if ( errno ) return false; |
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379 | if ( r > (unsigned)MAX ) return false; |
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380 | value = r; |
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381 | return true; |
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382 | } |
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383 | |
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384 | bool parse( const char * arg, unsigned long & value ) { |
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385 | unsigned long long int r = strict_strtoull( arg, 0 ); |
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386 | if ( errno ) return false; |
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387 | if ( r > (unsigned long)MAX ) return false; |
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388 | value = r; |
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389 | return true; |
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390 | } |
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391 | |
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392 | bool parse( const char * arg, unsigned long long & value ) { |
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393 | unsigned long long int r = strict_strtoull( arg, 0 ); |
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394 | if ( errno ) return false; |
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395 | if ( r > (unsigned long long)MAX ) return false; |
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396 | value = r; |
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397 | return true; |
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398 | } |
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399 | |
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400 | bool parse( const char * arg, double & value ) { |
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401 | char * end; |
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402 | double r = strtod( arg, &end ); |
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403 | if ( *end != '\0') return false; |
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404 | value = r; |
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405 | return true; |
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406 | } |
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