code.delx.au - gnu-emacs/blob - test/manual/etags/cp-src/functions.cpp

   1 #include "main.hpp"
   2 #pragma ident   "@(#)functions.cpp      1.0     98/11/12 (c) Rupak Rathore"
   3
   4 // Constructor default argument initializes to today's values
   5 void Date::setDate ( int d , int m , int y ){
   6         time_t t;
   7         struct tm * ptm;
   8         t = time ( NULL ) ;
   9         if ( date != NULL )
  10                 delete date;
  11         date = NULL;
  12         if ( d == 0 && m == 0 && y == 0 ) //Explicitly called or default constructor hence leave it.
  13                 return;
  14         if ( d < 0 && m < 0 && d < 0 ) //Special instruction to initialize to today's value
  15                 d=m=y=0;
  16         date = new tm;
  17         ptm=localtime ( &t ) ;
  18         *date=(*ptm);
  19         if ( d )
  20                 date->tm_mday = d;
  21         if ( m )
  22                 date->tm_mon = m - 1; // Months are counted from January
  23         if ( y > 1900 ) // Complete year specified so take into account
  24                 y -= 1900;
  25         if ( y )
  26                 date->tm_year = y;
  27         date->tm_sec=date->tm_min=date->tm_hour=0;
  28         t = mktime ( date ) ;
  29 }
  30
  31 // Addition operation ::: Warning ::: A combination of addition and substraction does not give a proper result
  32 void Date::plus ( int days , int month , int year ){
  33         if ( ! set () )
  34                 return;
  35         date->tm_mday += days ;
  36         date->tm_mon += month ;
  37         date->tm_year += year ;
  38         mktime ( date );
  39 }
  40
  41 //Substraction operation ::: Warning ::: A combination of addition and substraction does not give a proper result
  42 void Date::minus ( int days , int month , int year ){
  43         if ( ! set () )
  44                 return;
  45         date->tm_mday -= days ;
  46         date->tm_mon -= month ;
  47         date->tm_year -= year ;
  48         mktime ( date );
  49 }
  50
  51
  52 void Date::shift ( void ){//Shift this date to previous working days (useful for benchmarks)
  53         if ( ! set() )
  54                 return ;
  55         while(isHoliday(*this)||isweekend()){
  56                 date->tm_mday -= 1 ;
  57                 mktime ( date );
  58         }
  59 }
  60
  61 // Assignment
  62 Date & Date::operator = ( Date d ){
  63         if ( d.set() )
  64                 setDate ( d.date->tm_mday, d.date->tm_mon + 1, d.date->tm_year );
  65         return(*this);
  66 }
  67
  68 // Add number of days
  69 Date & Date::operator += ( int days ){
  70         if ( set () ){
  71                 date->tm_mday += days ;
  72                 mktime ( date );
  73         }
  74         return(*this);
  75 }
  76
  77 // Substract number of days
  78 Date & Date::operator -= ( int days ){
  79         if ( set () ){
  80                 date->tm_mday -= days ;
  81                 mktime ( date );
  82         }
  83         return(*this);
  84 }
  85
  86 // Advance one day
  87 Date & Date::operator ++ ( void ){
  88         if ( set () ){
  89                 date->tm_mday += 1 ;
  90                 mktime ( date );
  91         }
  92         return(*this);
  93 }
  94
  95 // Backwards one day
  96 Date & Date::operator -- ( void ){
  97         if ( set () ){
  98                 date->tm_mday -= 1 ;
  99                 mktime ( date );
 100         }
 101         return(*this);
 102 }
 103
 104 int Date::operator - ( Date d ){
 105         long l;
 106         if (( ! set() ) || (! d.set()))
 107                 return(0);
 108         l=(mktime(date)-mktime(d.date))/(3600*24);
 109         return((int)l);
 110 }
 111
 112 int Date::operator < ( Date d ) {
 113         return ( unidate() < d.unidate() );
 114 }
 115
 116 int Date::operator > ( Date d ) {
 117         return ( unidate() > d.unidate() );
 118 }
 119
 120 int Date::operator == ( Date d ) {
 121         return ( unidate() == d.unidate() );
 122 }
 123
 124 ostream& operator <<  ( ostream &c, Date d ) {
 125         if ( ! d.set() )
 126                 c << "Null";
 127         else
 128                 c << d.date->tm_mday << ":" << d.date->tm_mon + 1 << ":" << d.date->tm_year + 1900 ;
 129         return ( c );
 130 }
 131
 132 // Modified to read date in yyyymmdd format.
 133 istream& operator >> ( istream &i, Date & dd ){
 134         int d,m,y,tmp;
 135         i >> tmp;
 136         d=tmp%100;
 137         tmp/=100;
 138         m=tmp%100;
 139         tmp/=100;
 140         y=tmp;
 141         dd.setDate(d,m,y);
 142         return(i);
 143 }
 144 /*
 145 istream& operator >>  ( istream &i, Date &dd ) {
 146         char input[11];
 147         int d,m,y;
 148         cout << "Enter the date ( dd-mm-yyyy ) : ";
 149         i >> input ;
 150         d = ( input[0] - '0' ) * 10 + ( input[1] - '0' );
 151         m = ( input[3] - '0' ) * 10 + ( input[4] - '0' );
 152         y = ( input[6] - '0' ) * 1000 + ( input[7] - '0' ) * 100 + ( input[8] - '0' ) * 10 + ( input[9] - '0' );
 153         dd.setDate ( d, m, y );
 154         return ( i );
 155 }
 156 */
 157
 158 // Check whether given year is leap or not
 159 bool isLeap ( int year ){
 160         return ( (year%100==0) ? (year%400==0) : (year%4==0) );
 161 }
 162
 163 bool isHoliday ( Date d ){
 164         long int ld;
 165         ld = ( d.year()*100 + d.month() )*100 + d.day();
 166         for ( int i=0; i<no_of_vacations;i++)
 167                 if ( ld == vacation[i] )
 168                         return(true);
 169         return(false);
 170 }
 171
 172 // Sort the given array in ascending order
 173 void asort(int *a, int num){
 174         int i,k,mini,tmp;
 175         for ( k=1; k<num; k++ ){
 176                 mini=k-1;
 177                 for ( i=k; i<num; i++ )
 178                         if ( a[mini] > a[i] ) {
 179                                 tmp=a[i];
 180                                 a[i]=a[mini];
 181                                 a[mini]=tmp;
 182                         }
 183         }
 184 }
 185
 186 void ReadVacation ( char *filename ) {
 187         // cerr << filename;
 188         ifstream vacfile(filename);
 189         if ( ! vacfile.good() )
 190                 d_error("ReadVacation","Unable to find the vacation and holidays file");
 191         // cerr << filename ;
 192         d_silent("ReadVacation","vacation file successfully opened.");
 193         no_of_vacations = 0;
 194         while ( !vacfile.eof() )
 195                 vacfile >> vacation[no_of_vacations++];
 196         --no_of_vacations;
 197         d_silent("ReadVacation","Finished Reading file");
 198         vacfile.close();
 199 }
 200
 201 void Debug ( int lineno, int level, char* func , char* mesg ) // error_level, function, message
 202 {
 203         if ( debug_level <= level )
 204                 cerr << PROGNAME << ": " << func << ": " << lineno << ": " << debug_string[level] << ": " << mesg << endl;
 205         if ( level == ERROR ){
 206                 cerr << PROGNAME << ": Exiting because of fatal error." <<endl ;
 207                 exit(2);
 208         }
 209 }
 210
 211 int WorkingDays(Date a, Date b){
 212         Date tmp;
 213         int wdays=0,days=0;
 214         if ( (! a.set()) || (! b.set()) )
 215                 return(0);
 216         days=b-a+1; // Inclusive
 217         tmp=a;
 218         for ( int i=0;i<days;i++){
 219                 if((!isHoliday(tmp))&&(!tmp.isweekend()))
 220                         wdays++;
 221                 tmp++;
 222         }
 223         return(wdays);
 224 }
 225
 226 Date StartDay(Date a,int days){//Function to calculate the apropriate start day to finish in days working days
 227         Date tmp;
 228         int wdays=0;
 229         if ( ! a.set() )
 230                 return (a);
 231         tmp=a;
 232         while(wdays<days){
 233                 if((!isHoliday(tmp))&&(!tmp.isweekend()))
 234                         wdays++;
 235                 tmp--;
 236         }
 237         tmp++;
 238         return(tmp);
 239 }