//
// 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 : Mon Aug 14 18:22:36 2023
// Update Count     : 642
//

#include "stdlib.hfa"
#include "bits/random.hfa"
#include "concurrency/invoke.h"							// random_state

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

#include <string.h>										// memcpy, memset
//#include <math.h>										// fabsf, fabs, fabsl
#include <complex.h>									// _Complex_I
#include <assert.h>

#pragma GCC visibility push(default)

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

// Cforall allocation/deallocation and constructor/destructor, array types

forall( T & | sized(T), TT... | { void ?{}( T &, TT ); } )
T * anew( size_t dim, TT p ) {
	T * arr = alloc( dim );
	for ( i; dim ) {
		(arr[i]){ p };									// run constructor
	} // for
	return arr;
} // anew

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

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

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

forall( T | { T strto( const char sptr[], char * eptr[], int ); } )
T convert( const char sptr[] ) {
	char * eptr;
	errno = 0;											// reset
	T val = strto( sptr, &eptr, 10 );					// attempt conversion
	if ( errno == ERANGE ) throw ExceptionInst( out_of_range );
	if ( eptr == sptr ||								// conversion failed, no characters generated
		 *eptr != '\0' ) throw ExceptionInst( invalid_argument ); // not at end of str ?
	return val;
} // convert

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( 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( K, 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

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

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

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

// would be cool to make hidden but it's needed for libcfathread
__attribute__((visibility("default"))) size_t __global_random_seed; // sequential/concurrent
__attribute__((visibility("hidden"))) PRNG_STATE_T __global_random_state; // sequential only

void set_seed( size_t seed ) {
	__global_random_seed = seed;
	PRNG_SET_SEED( __global_random_state, seed );
} // set_seed

size_t get_seed() { return __global_random_seed; }
size_t prng( void ) { return PRNG_NAME( __global_random_state ); } // [0,UINT_MAX]

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

bool threading_enabled( void ) __attribute__(( weak )) { return false; }

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