1 | //
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2 | // Cforall Version 1.0.0 Copyright (C) 2015 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 | // fstream.c --
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8 | //
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9 | // Author : Peter A. Buhr
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10 | // Created On : Wed May 27 17:56:53 2015
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11 | // Last Modified By : Peter A. Buhr
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12 | // Last Modified On : Tue Sep 21 21:51:38 2021
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13 | // Update Count : 460
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14 | //
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15 |
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16 | #include "fstream.hfa" // also includes iostream.hfa
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17 |
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18 | #include <stdio.h> // vfprintf, vfscanf
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19 | #include <stdlib.h> // exit
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20 | #include <stdarg.h> // varargs
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21 | #include <string.h> // strncpy, strerror
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22 | #include <assert.h>
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23 | #include <errno.h> // errno
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24 |
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25 | // *********************************** ofstream ***********************************
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26 |
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27 |
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28 | #define IO_MSG "I/O error: "
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29 |
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30 | void ?{}( ofstream & os, void * file ) with(os) {
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31 | file$ = file;
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32 | sepDefault$ = true;
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33 | sepOnOff$ = false;
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34 | nlOnOff$ = true;
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35 | prt$ = false;
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36 | sawNL$ = false;
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37 | acquired$ = false;
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38 | sepSetCur$( os, sepGet( os ) );
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39 | sepSet( os, " " );
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40 | sepSetTuple( os, ", " );
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41 | } // ?{}
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42 |
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43 | // private
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44 | bool sepPrt$( ofstream & os ) { setNL$( os, false ); return os.sepOnOff$; }
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45 | void sepReset$( ofstream & os ) { os.sepOnOff$ = os.sepDefault$; }
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46 | void sepReset$( ofstream & os, bool reset ) { os.sepDefault$ = reset; os.sepOnOff$ = os.sepDefault$; }
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47 | const char * sepGetCur$( ofstream & os ) { return os.sepCur$; }
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48 | void sepSetCur$( ofstream & os, const char sepCur[] ) { os.sepCur$ = sepCur; }
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49 | bool getNL$( ofstream & os ) { return os.sawNL$; }
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50 | void setNL$( ofstream & os, bool state ) { os.sawNL$ = state; }
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51 | bool getANL$( ofstream & os ) { return os.nlOnOff$; }
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52 | bool getPrt$( ofstream & os ) { return os.prt$; }
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53 | void setPrt$( ofstream & os, bool state ) { os.prt$ = state; }
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54 |
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55 | // public
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56 | void ?{}( ofstream & os ) { os.file$ = 0p; }
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57 |
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58 | void ?{}( ofstream & os, const char name[], const char mode[] ) {
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59 | open( os, name, mode );
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60 | } // ?{}
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61 |
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62 | void ?{}( ofstream & os, const char name[] ) {
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63 | open( os, name, "w" );
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64 | } // ?{}
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65 |
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66 | void ^?{}( ofstream & os ) {
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67 | close( os );
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68 | } // ^?{}
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69 |
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70 | void sepOn( ofstream & os ) { os.sepOnOff$ = ! getNL$( os ); }
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71 | void sepOff( ofstream & os ) { os.sepOnOff$ = false; }
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72 |
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73 | bool sepDisable( ofstream & os ) {
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74 | bool temp = os.sepDefault$;
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75 | os.sepDefault$ = false;
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76 | sepReset$( os );
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77 | return temp;
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78 | } // sepDisable
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79 |
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80 | bool sepEnable( ofstream & os ) {
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81 | bool temp = os.sepDefault$;
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82 | os.sepDefault$ = true;
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83 | if ( os.sepOnOff$ ) sepReset$( os ); // start of line ?
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84 | return temp;
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85 | } // sepEnable
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86 |
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87 | void nlOn( ofstream & os ) { os.nlOnOff$ = true; }
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88 | void nlOff( ofstream & os ) { os.nlOnOff$ = false; }
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89 |
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90 | const char * sepGet( ofstream & os ) { return os.separator$; }
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91 | void sepSet( ofstream & os, const char s[] ) {
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92 | assert( s );
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93 | strncpy( os.separator$, s, ofstream_sepSize - 1 );
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94 | os.separator$[ofstream_sepSize - 1] = '\0';
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95 | } // sepSet
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96 |
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97 | const char * sepGetTuple( ofstream & os ) { return os.tupleSeparator$; }
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98 | void sepSetTuple( ofstream & os, const char s[] ) {
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99 | assert( s );
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100 | strncpy( os.tupleSeparator$, s, ofstream_sepSize - 1 );
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101 | os.tupleSeparator$[ofstream_sepSize - 1] = '\0';
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102 | } // sepSet
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103 |
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104 | void ends( ofstream & os ) {
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105 | if ( getANL$( os ) ) nl( os );
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106 | else setPrt$( os, false ); // turn off
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107 | if ( &os == &exit ) exit( EXIT_FAILURE );
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108 | if ( &os == &abort ) abort();
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109 | if ( os.acquired$ ) { os.acquired$ = false; release( os ); }
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110 | } // ends
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111 |
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112 | bool fail( ofstream & os ) {
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113 | return os.file$ == 0 || ferror( (FILE *)(os.file$) );
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114 | } // fail
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115 |
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116 | void clear( ofstream & os ) {
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117 | clearerr( (FILE *)(os.file$) );
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118 | } // clear
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119 |
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120 | int flush( ofstream & os ) {
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121 | return fflush( (FILE *)(os.file$) );
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122 | } // flush
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123 |
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124 | void open( ofstream & os, const char name[], const char mode[] ) {
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125 | FILE * file = fopen( name, mode );
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126 | if ( file == 0p ) {
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127 | throw (Open_Failure){ os };
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128 | // abort | IO_MSG "open output file \"" | name | "\"" | nl | strerror( errno );
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129 | } // if
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130 | (os){ file }; // initialize
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131 | } // open
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132 |
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133 | void open( ofstream & os, const char name[] ) {
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134 | open( os, name, "w" );
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135 | } // open
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136 |
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137 | void close( ofstream & os ) with(os) {
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138 | if ( (FILE *)(file$) == 0p ) return;
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139 | if ( (FILE *)(file$) == (FILE *)stdout || (FILE *)(file$) == (FILE *)stderr ) return;
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140 |
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141 | if ( fclose( (FILE *)(file$) ) == EOF ) {
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142 | throw (Close_Failure){ os };
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143 | // abort | IO_MSG "close output" | nl | strerror( errno );
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144 | } // if
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145 | file$ = 0p;
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146 | } // close
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147 |
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148 | ofstream & write( ofstream & os, const char data[], size_t size ) {
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149 | if ( fail( os ) ) {
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150 | throw (Write_Failure){ os };
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151 | // abort | IO_MSG "attempt write I/O on failed stream";
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152 | } // if
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153 |
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154 | if ( fwrite( data, 1, size, (FILE *)(os.file$) ) != size ) {
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155 | throw (Write_Failure){ os };
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156 | // abort | IO_MSG "write" | nl | strerror( errno );
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157 | } // if
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158 | return os;
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159 | } // write
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160 |
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161 | int fmt( ofstream & os, const char format[], ... ) {
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162 | va_list args;
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163 | va_start( args, format );
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164 | int len = vfprintf( (FILE *)(os.file$), format, args );
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165 | if ( len == EOF ) {
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166 | if ( ferror( (FILE *)(os.file$) ) ) {
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167 | abort | IO_MSG "invalid write";
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168 | } // if
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169 | } // if
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170 | va_end( args );
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171 |
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172 | setPrt$( os, true ); // called in output cascade
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173 | sepReset$( os ); // reset separator
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174 | return len;
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175 | } // fmt
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176 |
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177 | inline void acquire( ofstream & os ) with(os) {
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178 | lock( lock$ ); // may increase recursive lock
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179 | if ( ! acquired$ ) acquired$ = true; // not locked ?
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180 | else unlock( lock$ ); // unwind recursive lock at start
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181 | } // acquire
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182 |
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183 | inline void release( ofstream & os ) {
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184 | unlock( os.lock$ );
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185 | } // release
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186 |
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187 | void ?{}( osacquire & acq, ofstream & os ) { lock( os.lock$ ); &acq.os = &os; }
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188 | void ^?{}( osacquire & acq ) { release( acq.os ); }
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189 |
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190 | static ofstream soutFile = { (FILE *)stdout };
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191 | ofstream & sout = soutFile, & stdout = soutFile;
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192 | static ofstream serrFile = { (FILE *)stderr };
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193 | ofstream & serr = serrFile, & stderr = serrFile;
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194 |
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195 | static ofstream lsoutFile = { (FILE *)stdout };
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196 | ofstream & lsout = lsoutFile;
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197 |
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198 | static ofstream exitFile = { (FILE *)stdout };
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199 | ofstream & exit = exitFile;
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200 | static ofstream abortFile = { (FILE *)stderr };
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201 | ofstream & abort = abortFile;
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202 |
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203 | ofstream & nl( ofstream & os ) {
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204 | nl$( os ); // call basic_ostream nl
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205 | flush( os );
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206 | return os;
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207 | // (ofstream &)(os | '\n');
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208 | // setPrt$( os, false ); // turn off
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209 | // setNL$( os, true );
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210 | // flush( os );
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211 | // return sepOff( os ); // prepare for next line
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212 | } // nl
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213 |
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214 |
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215 | // *********************************** ifstream ***********************************
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216 |
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217 |
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218 | // private
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219 | void ?{}( ifstream & is, void * file ) with(is) {
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220 | file$ = file;
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221 | nlOnOff$ = false;
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222 | acquired$ = false;
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223 | } // ?{}
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224 |
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225 | // public
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226 | void ?{}( ifstream & is ) { is.file$ = 0p; }
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227 |
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228 | void ?{}( ifstream & is, const char name[], const char mode[] ) {
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229 | open( is, name, mode );
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230 | } // ?{}
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231 |
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232 | void ?{}( ifstream & is, const char name[] ) {
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233 | open( is, name, "r" );
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234 | } // ?{}
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235 |
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236 | void ^?{}( ifstream & is ) {
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237 | close( is );
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238 | } // ^?{}
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239 |
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240 | void nlOn( ifstream & os ) { os.nlOnOff$ = true; }
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241 | void nlOff( ifstream & os ) { os.nlOnOff$ = false; }
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242 | bool getANL( ifstream & os ) { return os.nlOnOff$; }
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243 |
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244 | bool fail( ifstream & is ) {
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245 | return is.file$ == 0p || ferror( (FILE *)(is.file$) );
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246 | } // fail
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247 |
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248 | void clear( ifstream & is ) {
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249 | clearerr( (FILE *)(is.file$) );
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250 | } // clear
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251 |
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252 | void ends( ifstream & is ) {
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253 | if ( is.acquired$ ) { is.acquired$ = false; release( is ); }
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254 | } // ends
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255 |
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256 | bool eof( ifstream & is ) {
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257 | return feof( (FILE *)(is.file$) );
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258 | } // eof
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259 |
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260 | void open( ifstream & is, const char name[], const char mode[] ) {
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261 | FILE * file = fopen( name, mode );
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262 | if ( file == 0p ) {
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263 | throw (Open_Failure){ is };
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264 | // abort | IO_MSG "open input file \"" | name | "\"" | nl | strerror( errno );
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265 | } // if
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266 | (is){ file }; // initialize
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267 | } // open
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268 |
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269 | void open( ifstream & is, const char name[] ) {
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270 | open( is, name, "r" );
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271 | } // open
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272 |
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273 | void close( ifstream & is ) with(is) {
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274 | if ( (FILE *)(file$) == 0p ) return;
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275 | if ( (FILE *)(file$) == (FILE *)stdin ) return;
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276 |
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277 | if ( fclose( (FILE *)(file$) ) == EOF ) {
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278 | throw (Close_Failure){ is };
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279 | // abort | IO_MSG "close input" | nl | strerror( errno );
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280 | } // if
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281 | file$ = 0p;
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282 | } // close
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283 |
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284 | ifstream & read( ifstream & is, char data[], size_t size ) {
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285 | if ( fail( is ) ) {
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286 | throw (Read_Failure){ is };
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287 | // abort | IO_MSG "attempt read I/O on failed stream";
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288 | } // if
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289 |
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290 | if ( fread( data, size, 1, (FILE *)(is.file$) ) == 0 ) {
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291 | throw (Read_Failure){ is };
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292 | // abort | IO_MSG "read" | nl | strerror( errno );
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293 | } // if
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294 | return is;
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295 | } // read
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296 |
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297 | ifstream &ungetc( ifstream & is, char c ) {
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298 | if ( fail( is ) ) {
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299 | abort | IO_MSG "attempt ungetc I/O on failed stream";
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300 | } // if
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301 |
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302 | if ( ungetc( c, (FILE *)(is.file$) ) == EOF ) {
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303 | abort | IO_MSG "ungetc" | nl | strerror( errno );
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304 | } // if
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305 | return is;
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306 | } // ungetc
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307 |
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308 | int fmt( ifstream & is, const char format[], ... ) {
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309 | va_list args;
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310 |
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311 | va_start( args, format );
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312 | int len = vfscanf( (FILE *)(is.file$), format, args );
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313 | if ( len == EOF ) {
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314 | if ( ferror( (FILE *)(is.file$) ) ) {
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315 | abort | IO_MSG "invalid read";
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316 | } // if
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317 | } // if
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318 | va_end( args );
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319 | return len;
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320 | } // fmt
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321 |
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322 | inline void acquire( ifstream & is ) with(is) {
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323 | lock( lock$ ); // may increase recursive lock
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324 | if ( ! acquired$ ) acquired$ = true; // not locked ?
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325 | else unlock( lock$ ); // unwind recursive lock at start
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326 | } // acquire
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327 |
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328 | inline void release( ifstream & is ) {
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329 | unlock( is.lock$ );
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330 | } // release
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331 |
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332 | void ?{}( isacquire & acq, ifstream & is ) { lock( is.lock$ ); &acq.is = &is; }
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333 | void ^?{}( isacquire & acq ) { release( acq.is ); }
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334 |
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335 | static ifstream sinFile = { (FILE *)stdin };
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336 | ifstream & sin = sinFile, & stdin = sinFile;
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337 |
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338 |
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339 | // *********************************** exceptions ***********************************
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340 |
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341 |
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342 | static vtable(Open_Failure) Open_Failure_vt;
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343 |
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344 | // exception I/O constructors
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345 | void ?{}( Open_Failure & ex, ofstream & ostream ) with(ex) {
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346 | virtual_table = &Open_Failure_vt;
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347 | ostream = &ostream;
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348 | tag = 1;
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349 | } // ?{}
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350 |
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351 | void ?{}( Open_Failure & ex, ifstream & istream ) with(ex) {
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352 | virtual_table = &Open_Failure_vt;
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353 | istream = &istream;
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354 | tag = 0;
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355 | } // ?{}
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356 |
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357 |
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358 | static vtable(Close_Failure) Close_Failure_vt;
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359 |
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360 | // exception I/O constructors
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361 | void ?{}( Close_Failure & ex, ofstream & ostream ) with(ex) {
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362 | virtual_table = &Close_Failure_vt;
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363 | ostream = &ostream;
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364 | tag = 1;
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365 | } // ?{}
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366 |
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367 | void ?{}( Close_Failure & ex, ifstream & istream ) with(ex) {
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368 | virtual_table = &Close_Failure_vt;
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369 | istream = &istream;
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370 | tag = 0;
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371 | } // ?{}
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372 |
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373 |
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374 | static vtable(Write_Failure) Write_Failure_vt;
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375 |
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376 | // exception I/O constructors
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377 | void ?{}( Write_Failure & ex, ofstream & ostream ) with(ex) {
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378 | virtual_table = &Write_Failure_vt;
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379 | ostream = &ostream;
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380 | tag = 1;
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381 | } // ?{}
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382 |
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383 | void ?{}( Write_Failure & ex, ifstream & istream ) with(ex) {
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384 | virtual_table = &Write_Failure_vt;
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385 | istream = &istream;
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386 | tag = 0;
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387 | } // ?{}
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388 |
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389 |
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390 | static vtable(Read_Failure) Read_Failure_vt;
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391 |
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392 | // exception I/O constructors
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393 | void ?{}( Read_Failure & ex, ofstream & ostream ) with(ex) {
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394 | virtual_table = &Read_Failure_vt;
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395 | ostream = &ostream;
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396 | tag = 1;
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397 | } // ?{}
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398 |
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399 | void ?{}( Read_Failure & ex, ifstream & istream ) with(ex) {
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400 | virtual_table = &Read_Failure_vt;
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401 | istream = &istream;
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402 | tag = 0;
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403 | } // ?{}
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404 |
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405 | // void throwOpen_Failure( ofstream & ostream ) {
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406 | // Open_Failure exc = { ostream };
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407 | // }
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408 |
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409 | // void throwOpen_Failure( ifstream & istream ) {
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410 | // Open_Failure exc = { istream };
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411 | // }
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412 |
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413 | // Local Variables: //
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414 | // tab-width: 4 //
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415 | // End: //
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