Float64.cc
// -*- mode: c++; c-basic-offset:4 -*-
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
// (c) COPYRIGHT URI/MIT 1994-1999
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
// Authors:
// jhrg,jimg James Gallagher <jgallagher@gso.uri.edu>
// Implementation for Float64.
//
// jhrg 9/7/94
#include "config.h"
//#define DODS_DEBUG
#include <sstream>
#include <iomanip>
#include "Byte.h" // synonymous with UInt8 and Char
#include "Int8.h"
#include "Int16.h"
#include "UInt16.h"
#include "Int32.h"
#include "UInt32.h"
#include "Int64.h"
#include "UInt64.h"
#include "Float32.h"
#include "Float64.h"
#include "Str.h"
#include "Url.h"
#include "DDS.h"
#include "Marshaller.h"
#include "UnMarshaller.h"
#include "DMR.h"
#include "D4StreamMarshaller.h"
#include "D4StreamUnMarshaller.h"
#include "util.h"
#include "parser.h"
#include "Operators.h"
#include "dods-limits.h"
#include "InternalErr.h"
using std::cerr;
using std::endl;
namespace libdap {
Float64::Float64(const string &n) : BaseType(n, dods_float64_c), d_buf(0)
{}
Float64::Float64(const string &n, const string &d) : BaseType(n, d, dods_float64_c), d_buf(0)
{}
Float64::Float64(const Float64 &copy_from) : BaseType(copy_from)
{
d_buf = copy_from.d_buf;
}
BaseType *
Float64::ptr_duplicate()
{
return new Float64(*this);
}
Float64 &
Float64::operator=(const Float64 &rhs)
{
if (this == &rhs)
return *this;
dynamic_cast<BaseType &>(*this) = rhs;
d_buf = rhs.d_buf;
return *this;
}
unsigned int
Float64::width(bool) const
{
return sizeof(dods_float64);
}
bool
Float64::serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval)
{
#if USE_LOCAL_TIMEOUT_SCHEME
dds.timeout_on();
#endif
if (!read_p())
read(); // read() throws Error and InternalErr
if (ce_eval && !eval.eval_selection(dds, dataset()))
return true;
#if USE_LOCAL_TIMEOUT_SCHEME
dds.timeout_off();
#endif
m.put_float64( d_buf ) ;
return true;
}
bool
Float64::deserialize(UnMarshaller &um, DDS *, bool)
{
um.get_float64( d_buf ) ;
return false;
}
void
Float64::compute_checksum(Crc32 &checksum)
{
checksum.AddData(reinterpret_cast<uint8_t*>(&d_buf), sizeof(d_buf));
}
void
Float64::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool)
{
if (!read_p())
read(); // read() throws Error
m.put_float64( d_buf ) ;
}
void
Float64::deserialize(D4StreamUnMarshaller &um, DMR &)
{
um.get_float64( d_buf ) ;
}
unsigned int
Float64::val2buf(void *val, bool)
{
// Jose Garcia
// This method is public therefore and I believe it has being designed
// to be use by read which must be implemented on the surrogated library,
// thus if the pointer val is NULL, is an Internal Error.
if (!val)
throw InternalErr(__FILE__, __LINE__,
"The incoming pointer does not contain any data.");
d_buf = *(dods_float64 *)val;
return width();
}
unsigned int
Float64::buf2val(void **val)
{
// Jose Garcia
// The same comment justifying throwing an Error in val2buf applies here.
if (!val)
throw InternalErr(__FILE__, __LINE__, "NULL pointer.");
if (!*val)
*val = new dods_float64;
*(dods_float64 *)*val = d_buf;
return width();
}
dods_float64
Float64::value() const
{
return d_buf;
}
bool
Float64::set_value(dods_float64 val)
{
d_buf = val;
set_read_p(true);
return true;
}
void
Float64::print_val(FILE *out, string space, bool print_decl_p)
{
ostringstream oss;
print_val(oss, space, print_decl_p);
fwrite(oss.str().data(), sizeof(char), oss.str().length(), out);
}
void
Float64::print_val(ostream &out, string space, bool print_decl_p)
{
// Set the precision to 15 digits
std::streamsize prec = out.precision(15);
if (print_decl_p) {
print_decl(out, space, false);
out << " = " << d_buf << ";\n";
}
else
out << d_buf;
// reset the precision
out.precision(prec);
}
bool
Float64::ops(BaseType *b, int op)
{
// Extract the Byte arg's value.
if (!read_p() && !read()) {
// Jose Garcia
// Since the read method is virtual and implemented outside
// libdap++ if we cannot read the data that is the problem
// of the user or of whoever wrote the surrogate library
// implemeting read therefore it is an internal error.
throw InternalErr(__FILE__, __LINE__, "This value not read!");
}
// Extract the second arg's value.
if (!b->read_p() && !b->read()) {
// Jose Garcia
// Since the read method is virtual and implemented outside
// libdap++ if we cannot read the data that is the problem
// of the user or of whoever wrote the surrogate library
// implemeting read therefore it is an internal error.
throw InternalErr(__FILE__, __LINE__, "This value not read!");
}
return d4_ops(b, op);
}
bool
Float64::d4_ops(BaseType *b, int op)
{
DBG(cerr << "b->typename(): " << b->type_name() << endl);
switch (b->type()) {
case dods_int8_c:
return Cmp<dods_float64, dods_int8>(op, d_buf, static_cast<Int8*>(b)->value());
case dods_byte_c:
return SUCmp<dods_float64, dods_byte>(op, d_buf, static_cast<Byte*>(b)->value());
case dods_int16_c:
return Cmp<dods_float64, dods_int16>(op, d_buf, static_cast<Int16*>(b)->value());
case dods_uint16_c:
return SUCmp<dods_float64, dods_uint16>(op, d_buf, static_cast<UInt16*>(b)->value());
case dods_int32_c:
return Cmp<dods_float64, dods_int32>(op, d_buf, static_cast<Int32*>(b)->value());
case dods_uint32_c:
return SUCmp<dods_float64, dods_uint32>(op, d_buf, static_cast<UInt32*>(b)->value());
case dods_int64_c:
return Cmp<dods_float64, dods_int64>(op, d_buf, static_cast<Int64*>(b)->value());
case dods_uint64_c:
return SUCmp<dods_float64, dods_uint64>(op, d_buf, static_cast<UInt64*>(b)->value());
case dods_float32_c:
// Note that this code casts the double (dods_float64) to a float because when
// real numbers are approximated using float or double, errors are larger in the float
// case, making <= and == operators fail. By casting to the smaller type, the
// same values have the same error and we can avoid using a range compare and a
// delta value.
return Cmp<dods_float32, dods_float32>(op, (float)d_buf, static_cast<Float32*>(b)->value());
case dods_float64_c:
return Cmp<dods_float64, dods_float64>(op, d_buf, static_cast<Float64*>(b)->value());
case dods_str_c:
case dods_url_c:
throw Error(malformed_expr, "Relational operators can only compare compatible types (number, string).");
default:
throw Error(malformed_expr, "Relational operators only work with scalar types.");
}
}
void
Float64::dump(ostream &strm) const
{
strm << DapIndent::LMarg << "Float64::dump - ("
<< (void *)this << ")" << endl ;
DapIndent::Indent() ;
BaseType::dump(strm) ;
strm << DapIndent::LMarg << "value: " << d_buf << endl ;
DapIndent::UnIndent() ;
}
} // namespace libdap
libdap::BaseType::read
virtual bool read()
Read data into a local buffer.
Definition: BaseType.cc:890
libdap::Int8
Holds an 8-bit signed integer value.
Definition: Int8.h:42
libdap::Int64
Holds a64-bit signed integer.
Definition: Int64.h:49
libdap::BaseType::read_p
virtual bool read_p()
Has this variable been read?
Definition: BaseType.cc:471
libdap::UnMarshaller
abstract base class used to unmarshall/deserialize dap data objects
Definition: UnMarshaller.h:54
libdap::BaseType::print_decl
virtual void print_decl(FILE *out, string space=" ", bool print_semi=true, bool constraint_info=false, bool constrained=false)
Print an ASCII representation of the variable structure.
Definition: BaseType.cc:994
libdap::BaseType::dump
virtual void dump(ostream &strm) const
dumps information about this object
Definition: BaseType.cc:282
libdap::Float64::buf2val
virtual unsigned int buf2val(void **val)
Reads the class data.
Definition: Float64.cc:200
libdap::Float64::compute_checksum
virtual void compute_checksum(Crc32 &checksum)
include the data for this variable in the checksum DAP4 includes a checksum with every data response...
Definition: Float64.cc:155
libdap::Float64::deserialize
virtual bool deserialize(UnMarshaller &um, DDS *dds, bool reuse=false)
Receive data from the net.
Definition: Float64.cc:147
libdap::Float64::width
virtual unsigned int width(bool constrained=false) const
How many bytes does this use Return the number of bytes of storage this variable uses. For scalar types, this is pretty simple (an int32 uses 4 bytes, etc.). For arrays and Constructors, it is a bit more complex. Note that a scalar String variable uses sizeof(String*) bytes, not the length of the string. In other words, the value returned is independent of the type. Also note width() of a String array returns the number of elements in the array times sizeof(String*). That is, each different array size is a different data type.
Definition: Float64.cc:122
libdap::D4StreamUnMarshaller
Read data from the stream made by D4StreamMarshaller.
Definition: D4StreamUnMarshaller.h:65
libdap::Float64::ptr_duplicate
virtual BaseType * ptr_duplicate()
Definition: Float64.cc:103
libdap::UInt16
Holds an unsigned 16-bit integer.
Definition: UInt16.h:57
Crc32
Definition: crc.h:76
libdap::BaseType::BaseType
BaseType(const string &n, const Type &t, bool is_dap4=false)
The BaseType constructor.
Definition: BaseType.cc:125
libdap::Float64::d4_ops
virtual bool d4_ops(BaseType *b, int op)
Evaluator a relop for DAP4.
Definition: Float64.cc:287
libdap::Float64::serialize
virtual bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval=true)
Move data to the net, then remove them from the object.
Definition: Float64.cc:128
libdap::Float64::value
virtual dods_float64 value() const
Definition: Float64.cc:221
libdap
Definition: AlarmHandler.h:35
libdap::InternalErr
A class for software fault reporting.
Definition: InternalErr.h:64
libdap::Float64::ops
virtual bool ops(BaseType *b, int op)
Evaluate relational operators.
Definition: Float64.cc:261
libdap::DMR
Definition: DMR.h:55
libdap::D4StreamMarshaller
Marshaller that knows how to marshal/serialize dap data objects to a C++ iostream using DAP4&#39;s receiv...
Definition: D4StreamMarshaller.h:71
libdap::Int16
Holds a 16-bit signed integer value.
Definition: Int16.h:59
libdap::DDS
Definition: DDS.h:180
libdap::BaseType::type
virtual Type type() const
Returns the type of the class instance.
Definition: BaseType.cc:356
libdap::Float64::Float64
Float64(const string &n)
Definition: Float64.cc:84
libdap::BaseType::set_read_p
virtual void set_read_p(bool state)
Sets the value of the read_p property.
Definition: BaseType.cc:507
libdap::UInt64
Holds a 64-bit unsigned integer.
Definition: UInt64.h:49
Crc32::AddData
void AddData(const uint8_t *pData, const uint32_t length)
Definition: crc.h:98
libdap::Float64::val2buf
virtual unsigned int val2buf(void *val, bool reuse=false)
Loads class data.
Definition: Float64.cc:184
libdap::Float64::dump
virtual void dump(ostream &strm) const
dumps information about this object
Definition: Float64.cc:334
libdap::ConstraintEvaluator
Evaluate a constraint expression.
Definition: ConstraintEvaluator.h:42
libdap::BaseType
The basic data type for the DODS DAP types.
Definition: BaseType.h:117
libdap::Marshaller
abstract base class used to marshal/serialize dap data objects
Definition: Marshaller.h:50
libdap::BaseType::type_name
virtual string type_name() const
Returns the type of the class instance as a string.
Definition: BaseType.cc:370
libdap::Float64
Holds a 64-bit (double precision) floating point value.
Definition: Float64.h:60
libdap::Byte
Holds a single byte.
Definition: Byte.h:60
libdap::ConstraintEvaluator::eval_selection
bool eval_selection(DDS &dds, const std::string &dataset)
Evaluate a boolean-valued constraint expression. This is main method for the evaluator and is called ...
Definition: ConstraintEvaluator.cc:331
libdap::Error
A class for error processing.
Definition: Error.h:90
libdap::UInt32
Holds a 32-bit unsigned integer.
Definition: UInt32.h:59
libdap::Float64::print_val
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
Definition: Float64.cc:236
libdap::Int32
Holds a 32-bit signed integer.
Definition: Int32.h:65
libdap::BaseType::dataset
virtual string dataset() const
Returns the name of the dataset used to create this instance.
Definition: BaseType.cc:349