source: src/libcfa/stdlib.c @ 2260ab6c

//
// Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// stdlib.c --
//
// Author           : Peter A. Buhr
// Created On       : Thu Jan 28 17:10:29 2016
// Last Modified By : Peter A. Buhr
// Last Modified On : Tue Jul  3 08:17:30 2018
// Update Count     : 457
//

#include "stdlib"

//---------------------------------------

#define _XOPEN_SOURCE 600                                                               // posix_memalign, *rand48
#include <string.h>                                                                             // memcpy, memset
#include <malloc.h>                                                                             // malloc_usable_size
#include <math.h>                                                                               // fabsf, fabs, fabsl
#include <complex.h>                                                                    // _Complex_I
#include <assert.h>

//---------------------------------------

// resize, non-array types
forall( dtype T | sized(T) ) T * alloc( T ptr[], size_t dim, char fill ) {
        size_t olen = malloc_usable_size( ptr );                        // current allocation
    char * nptr = (void *)realloc( (void *)ptr, dim * (size_t)sizeof(T) ); // C realloc
        size_t nlen = malloc_usable_size( nptr );                       // new allocation
        if ( nlen > olen ) {                                                            // larger ?
                memset( nptr + olen, (int)fill, nlen - olen );  // initialize added storage
        } //
    return (T *)nptr;
} // alloc

// allocation/deallocation and constructor/destructor, non-array types
forall( dtype T | sized(T), ttype Params | { void ?{}( T &, Params ); } )
T * new( Params p ) {
        return &(*malloc()){ p };                                                               // run constructor
} // new

forall( dtype T | sized(T) | { void ^?{}( T & ); } )
void delete( T * ptr ) {
        if ( ptr ) {                                                                            // ignore null
                ^(*ptr){};                                                                                      // run destructor
                free( ptr );
        } // if
} // delete

forall( dtype T, ttype Params | sized(T) | { void ^?{}( T & ); void delete( Params ); } )
void delete( T * ptr, Params rest ) {
        if ( ptr ) {                                                                            // ignore null
                ^(*ptr){};                                                                                      // run destructor
                free( ptr );
        } // if
        delete( rest );
} // delete


// allocation/deallocation and constructor/destructor, array types
forall( dtype T | sized(T), ttype Params | { void ?{}( T &, Params ); } )
T * anew( size_t dim, Params p ) {
        T *arr = alloc( dim );
        for ( unsigned int i = 0; i < dim; i += 1 ) {
                (arr[i]){ p };                                                                  // run constructor
        } // for
        return arr;
} // anew

forall( dtype T | sized(T) | { void ^?{}( T & ); } )
void adelete( size_t dim, T arr[] ) {
        if ( arr ) {                                                                            // ignore null
                for ( int i = dim - 1; i >= 0; i -= 1 ) {               // reverse allocation order, must be unsigned
                        ^(arr[i]){};                                                            // run destructor
                } // for
                free( arr );
        } // if
} // adelete

forall( dtype T | sized(T) | { void ^?{}( T & ); }, ttype Params | { void adelete( Params ); } )
void adelete( size_t dim, T arr[], Params rest ) {
        if ( arr ) {                                                                            // ignore null
                for ( int i = dim - 1; i >= 0; i -= 1 ) {               // reverse allocation order, must be unsigned
                        ^(arr[i]){};                                                            // run destructor
                } // for
                free( arr );
        } // if
        adelete( rest );
} // adelete

//---------------------------------------

float _Complex strto( const char * sptr, char ** eptr ) {
        float re, im;
        char * eeptr;
        re = strtof( sptr, &eeptr );
        if ( sptr == eeptr ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0f + 0.0f * _Complex_I; }
        im = strtof( eeptr, &eeptr );
        if ( sptr == eeptr ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0f + 0.0f * _Complex_I; }
        if ( *eeptr != 'i' ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0f + 0.0f * _Complex_I; }
        return re + im * _Complex_I;
} // strto

double _Complex strto( const char * sptr, char ** eptr ) {
        double re, im;
        char * eeptr;
        re = strtod( sptr, &eeptr );
        if ( sptr == eeptr ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0 + 0.0 * _Complex_I; }
        im = strtod( eeptr, &eeptr );
        if ( sptr == eeptr ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0 + 0.0 * _Complex_I; }
        if ( *eeptr != 'i' ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0 + 0.0 * _Complex_I; }
        return re + im * _Complex_I;
} // strto

long double _Complex strto( const char * sptr, char ** eptr ) {
        long double re, im;
        char * eeptr;
        re = strtold( sptr, &eeptr );
        if ( sptr == eeptr ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0L + 0.0L * _Complex_I; }
        im = strtold( eeptr, &eeptr );
        if ( sptr == eeptr ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0L + 0.0L * _Complex_I; }
        if ( *eeptr != 'i' ) { if ( eptr != 0 ) *eptr = eeptr; return 0.0L + 0.0L * _Complex_I; }
        return re + im * _Complex_I;
} // strto

//---------------------------------------

forall( otype E | { int ?<?( E, E ); } ) {
        E * bsearch( E key, const E * vals, size_t dim ) {
                int cmp( const void * t1, const void * t2 ) {
                        return *(E *)t1 < *(E *)t2 ? -1 : *(E *)t2 < *(E *)t1 ? 1 : 0;
                } // cmp
                return (E *)bsearch( &key, vals, dim, sizeof(E), cmp );
        } // bsearch

        size_t bsearch( E key, const E * vals, size_t dim ) {
                E * result = bsearch( key, vals, dim );
                return result ? result - vals : dim;                    // pointer subtraction includes sizeof(E)
        } // bsearch

        size_t bsearchl( E key, const E * vals, size_t dim ) {
                size_t l = 0, m, h = dim;
                while ( l < h ) {
                        m = (l + h) / 2;
                        if ( (E &)(vals[m]) < key ) {                           // cast away const
                                l = m + 1;
                        } else {
                                h = m;
                        } // if
                } // while
                return l;
        } // bsearchl

        E * bsearchl( E key, const E * vals, size_t dim ) {
                size_t posn = bsearchl( key, vals, dim );
                return (E *)(&vals[posn]);                                              // cast away const
        } // bsearchl

        size_t bsearchu( E key, const E * vals, size_t dim ) {
                size_t l = 0, m, h = dim;
                while ( l < h ) {
                        m = (l + h) / 2;
                        if ( ! ( key < (E &)(vals[m]) ) ) {                     // cast away const
                                l = m + 1;
                        } else {
                                h = m;
                        } // if
                } // while
                return l;
        } // bsearchu

        E * bsearchu( E key, const E * vals, size_t dim ) {
                size_t posn = bsearchu( key, vals, dim );
                return (E *)(&vals[posn]);
        } // bsearchu


        void qsort( E * vals, size_t dim ) {
                int cmp( const void * t1, const void * t2 ) {
                        return *(E *)t1 < *(E *)t2 ? -1 : *(E *)t2 < *(E *)t1 ? 1 : 0;
                } // cmp
                qsort( vals, dim, sizeof(E), cmp );
        } // qsort
} // distribution


forall( otype K, otype E | { int ?<?( K, K ); K getKey( const E & ); } ) {
        E * bsearch( K key, const E * vals, size_t dim ) {
                int cmp( const void * t1, const void * t2 ) {
                        return *(K *)t1 < getKey( *(E *)t2 ) ? -1 : getKey( *(E *)t2 ) < *(K *)t1 ? 1 : 0;
                } // cmp
                return (E *)bsearch( &key, vals, dim, sizeof(E), cmp );
        } // bsearch

        size_t bsearch( K key, const E * vals, size_t dim ) {
                E * result = bsearch( key, vals, dim );
                return result ? result - vals : dim;                    // pointer subtraction includes sizeof(E)
        } // bsearch

        size_t bsearchl( K key, const E * vals, size_t dim ) {
                size_t l = 0, m, h = dim;
                while ( l < h ) {
                        m = (l + h) / 2;
                        if ( getKey( vals[m] ) < key ) {
                                l = m + 1;
                        } else {
                                h = m;
                        } // if
                } // while
                return l;
        } // bsearchl

        E * bsearchl( K key, const E * vals, size_t dim ) {
                size_t posn = bsearchl( key, vals, dim );
                return (E *)(&vals[posn]);                                              // cast away const
        } // bsearchl

        size_t bsearchu( K key, const E * vals, size_t dim ) {
                size_t l = 0, m, h = dim;
                while ( l < h ) {
                        m = (l + h) / 2;
                        if ( ! ( key < getKey( vals[m] ) ) ) {
                                l = m + 1;
                        } else {
                                h = m;
                        } // if
                } // while
                return l;
        } // bsearchu

        E * bsearchu( K key, const E * vals, size_t dim ) {
                size_t posn = bsearchu( key, vals, dim );
                return (E *)(&vals[posn]);
        } // bsearchu
} // distribution

//---------------------------------------

[ int, int ] div( int num, int denom ) { div_t qr = div( num, denom ); return [ qr.quot, qr.rem ]; }
[ long int, long int ] div( long int num, long int denom ) { ldiv_t qr = ldiv( num, denom ); return [ qr.quot, qr.rem ]; }
[ long long int, long long int ] div( long long int num, long long int denom ) { lldiv_t qr = lldiv( num, denom ); return [ qr.quot, qr.rem ]; }
forall( otype T | { T ?/?( T, T ); T ?%?( T, T ); } )
[ T, T ] div( T num, T denom ) { return [ num / denom, num % denom ]; }

//---------------------------------------

extern "C" {                                                                                    // override C version
        void srandom( unsigned int seed ) { srand48( (long int)seed ); }
        long int random( void ) { return mrand48(); }
} // extern "C"

float random( void ) { return (float)drand48(); }               // cast otherwise float uses lrand48
double random( void ) { return drand48(); }
float _Complex random( void ) { return (float)drand48() + (float _Complex)(drand48() * _Complex_I); }
double _Complex random( void ) { return drand48() + (double _Complex)(drand48() * _Complex_I); }
long double _Complex random( void ) { return (long double)drand48() + (long double _Complex)(drand48() * _Complex_I); }


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