| 1 | #include <fstream.hfa>
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| 2 | using namespace std;
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| 3 | #include "parseconfig.hfa"
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| 4 |
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| 5 | static bool comments( ifstream & in, string & name ) {
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| 6 | for ( ;; ) {
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| 7 | in | name;
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| 8 | if ( fail( in ) ) return true;
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| 9 | if ( name.substr(0,1) != "#" ) break;
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| 10 | in | nl; // ignore remainder of line
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| 11 | } // for
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| 12 | return false;
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| 13 | } // comments
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| 14 |
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| 15 | // Process the configuration file to set the simulation parameters.
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| 16 | void parseConfig( const char * configFile, ConfigParms & cparms ) {
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| 17 | enum { Parmnum = 11 };
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| 18 | struct {
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| 19 | const char * name; // configuration name
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| 20 | bool used; // already supplied ?
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| 21 | unsigned int & value; // location to put configuration value
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| 22 | } static parms[Parmnum] = {
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| 23 | { "StopCost", false, cparms.stopCost },
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| 24 | { "NumStudents", false, cparms.numStudents },
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| 25 | { "NumStops", false, cparms.numStops },
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| 26 | { "MaxNumStudents", false, cparms.maxNumStudents },
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| 27 | { "TimerDelay", false, cparms.timerDelay },
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| 28 | { "MaxStudentDelay", false, cparms.maxStudentDelay },
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| 29 | { "MaxStudentTrips", false, cparms.maxStudentTrips },
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| 30 | { "GroupoffDelay", false, cparms.groupoffDelay },
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| 31 | { "ConductorDelay", false, cparms.conductorDelay },
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| 32 | { "ParentalDelay", false, cparms.parentalDelay },
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| 33 | { "NumCouriers", false, cparms.numCouriers },
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| 34 | };
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| 35 | string name;
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| 36 | int value;
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| 37 | unsigned int cnt, posn, numOfParm = 0;
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| 38 |
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| 39 | try {
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| 40 | ifstream in;
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| 41 |
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| 42 | open( in, configFile ); // open the configuration file for input
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| 43 |
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| 44 | for ( cnt = 0 ; cnt < Parmnum; ++cnt ) { // parameter names can appear in any order
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| 45 | if ( comments( in, name ) ) break; // eof ?
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| 46 | for ( posn = 0; posn < Parmnum && name != parms[posn].name; ++posn ); // linear search
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| 47 | if ( posn == Parmnum ) break; // configuration not found ?
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| 48 | if ( parms[posn].used ) break; // duplicate configuration ?
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| 49 | in | value;
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| 50 | if ( value < 0 ) {
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| 51 | exit | "Error: file \"" | configFile | "\" parameter " | name
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| 52 | | " value " | value | " must be non-negative."; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 53 | } // if
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| 54 | if ( fail( in ) ) break;
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| 55 | in | nl; // ignore remainder of line
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| 56 | ++numOfParm;
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| 57 | parms[posn].used = true;
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| 58 | parms[posn].value = value;
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| 59 | } // for
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| 60 |
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| 61 | if ( numOfParm != Parmnum ) {
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| 62 | exit | "Error: file \"" | configFile | "\" is corrupt."; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 63 | } // if
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| 64 | if ( ! comments( in, name ) ) { // ! eof ?
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| 65 | exit | "Error: file \"" | configFile | "\" has extraneous data."; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 66 | } // if
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| 67 | } catch( Open_Failure * ex; ex->istream == &in ) {
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| 68 | exit | "Error: could not open input file \"" | configFile | "\""; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 69 | } finally {
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| 70 | close( in );
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| 71 | } // try
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| 72 |
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| 73 | if ( cparms.numStops < 2 ) {
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| 74 | exit | "Error: file \"" | configFile | "\" parameter NumStops value "
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| 75 | | cparms.numStops | " must be at least 2."; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 76 | }
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| 77 | if ( cparms.numStudents < 1 ) {
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| 78 | exit | "Error: file \"" | configFile | "\" parameter NumStudents value "
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| 79 | | cparms.numStudents | " must be at least 1."; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 80 | }
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| 81 | if ( cparms.numCouriers < 1 ) {
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| 82 | exit | "Error: file \"" | configFile | "\" parameter NumCouriers value "
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| 83 | | cparms.numCouriers | " must be at least 1."; // *** DOES THIS PRINT TO STDERR??? IT MUST!!! *** //
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| 84 | }
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| 85 | } // processConfigFile
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| 86 |
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| 87 | // Local Variables: //
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| 88 | // tab-width: 4 //
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| 89 | // compile-command: "cfa parseconfig.cfa" //
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| 90 | // End: //
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