Byte.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 Byte.
//
// jhrg 9/7/94
// #define DODS_DEBUG
#include "config.h"
#include <sstream>
#include "Byte.h" // synonymous with UInt8 and Char
#include "Float32.h"
#include "Float64.h"
#include "Int16.h"
#include "Int32.h"
#include "Int64.h"
#include "Int8.h"
#include "Str.h"
#include "UInt16.h"
#include "UInt32.h"
#include "UInt64.h"
#include "Url.h"
#include "DDS.h"
#include "Marshaller.h"
#include "Operators.h"
#include "UnMarshaller.h"
#include "D4Attributes.h"
#include "D4StreamMarshaller.h"
#include "D4StreamUnMarshaller.h"
#include "DMR.h"
#include "DapIndent.h"
#include "InternalErr.h"
#include "debug.h"
#include "dods-limits.h"
#include "parser.h"
#include "util.h"
using std::cerr;
using std::endl;
namespace libdap {
Byte::Byte(const string &n) : BaseType(n, dods_byte_c), d_buf(0) {}
Byte::Byte(const string &n, const string &d) : BaseType(n, d, dods_byte_c), d_buf(0) {}
Byte::Byte(const Byte &copy_from) : BaseType(copy_from) { d_buf = copy_from.d_buf; }
BaseType *Byte::ptr_duplicate() { return new Byte(*this); }
Byte &Byte::operator=(const Byte &rhs) {
if (this == &rhs)
return *this;
BaseType::operator=(rhs);
d_buf = rhs.d_buf;
return *this;
}
bool Byte::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_byte(d_buf);
return true;
}
bool Byte::deserialize(UnMarshaller &um, DDS *, bool) {
um.get_byte(d_buf);
return false;
}
void Byte::compute_checksum(Crc32 &checksum) { checksum.AddData(reinterpret_cast<uint8_t *>(&d_buf), sizeof(d_buf)); }
void Byte::serialize(D4StreamMarshaller &m, DMR &, /*ConstraintEvaluator &,*/ bool) {
if (!read_p())
read(); // read() throws Error
m.put_byte(d_buf);
}
void Byte::deserialize(D4StreamUnMarshaller &um, DMR &) { um.get_byte(d_buf); }
unsigned int Byte::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 surrogate library,
// thus if the pointer val is NULL, is an Internal Error.
if (!val)
throw InternalErr("the incoming pointer does not contain any data.");
d_buf = *(dods_byte *)val;
return width();
}
unsigned int Byte::buf2val(void **val) {
// Jose Garcia
// The same comment justifying throwing an Error in val2buf applies here.
if (!val)
throw InternalErr("NULL pointer");
if (!*val)
*val = new dods_byte;
*(dods_byte *)*val = d_buf;
return width();
}
bool Byte::set_value(dods_byte value) {
d_buf = value;
set_read_p(true);
return true;
}
dods_byte Byte::value() const { return d_buf; }
void Byte::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 Byte::print_val(ostream &out, string space, bool print_decl_p) {
if (print_decl_p) {
print_decl(out, space, false);
out << " = " << (int)d_buf << ";\n";
} else
out << (int)d_buf;
}
bool Byte::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
// implementing read therefore it is an internal error.
throw InternalErr("This value not read!");
}
// Extract the second arg's value.
if (!b || !(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
// implementing read therefore it is an internal error.
throw InternalErr("This value not read!");
}
// By using the same operator code numbers for both the DAP2 and DAP4
// parser/evaluator we can use the same evaluation code.
return d4_ops(b, op);
}
bool Byte::d4_ops(BaseType *b, int op) {
switch (b->type()) {
case dods_int8_c:
return Cmp<dods_byte, dods_int8>(op, d_buf, static_cast<Int8 *>(b)->value());
case dods_byte_c:
return Cmp<dods_byte, dods_byte>(op, d_buf, static_cast<Byte *>(b)->value());
case dods_int16_c:
return Cmp<dods_byte, dods_int16>(op, d_buf, static_cast<Int16 *>(b)->value());
case dods_uint16_c:
return Cmp<dods_byte, dods_uint16>(op, d_buf, static_cast<UInt16 *>(b)->value());
case dods_int32_c:
return Cmp<dods_byte, dods_int32>(op, d_buf, static_cast<Int32 *>(b)->value());
case dods_uint32_c:
return Cmp<dods_byte, dods_uint32>(op, d_buf, static_cast<UInt32 *>(b)->value());
case dods_int64_c:
return Cmp<dods_byte, dods_int64>(op, d_buf, static_cast<Int64 *>(b)->value());
case dods_uint64_c:
return Cmp<dods_byte, dods_uint64>(op, d_buf, static_cast<UInt64 *>(b)->value());
case dods_float32_c:
return Cmp<dods_byte, dods_float32>(op, d_buf, static_cast<Float32 *>(b)->value());
case dods_float64_c:
return Cmp<dods_byte, 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.");
}
}
std::vector<BaseType *> *Byte::transform_to_dap2(AttrTable *parent_attr_table) {
DBG(cerr << __func__ << "() - BEGIN" << endl;);
vector<BaseType *> *vec = BaseType::transform_to_dap2(parent_attr_table);
if (vec->size() != 1) {
ostringstream oss;
oss << __func__ << "() - Something Bad Happened. This transform should produce only ";
oss << " a single BaseType yet it produced " << vec->size();
throw Error(internal_error, oss.str());
}
BaseType *dest = (*vec)[0];
DBG(cerr << __func__ << "() - type(): " << type() << endl;);
DBG(cerr << __func__ << "() - dest->type(): " << dest->type() << endl;);
// This little bit of magic ensures that the DAP4 shenanigans
// in which UInt8, Char , and Byte are synonymous is reduced
// to the DAP2 simplicity of Byte.
if (type() != dods_byte_c) {
dest->set_type(dods_byte_c);
}
DBG(dest->get_attr_table().print(cerr););
DBG(cerr << __func__ << "() - END" << endl;);
return vec;
}
void Byte::dump(ostream &strm) const {
strm << DapIndent::LMarg << "Byte::dump - (" << (void *)this << ")" << endl;
DapIndent::Indent();
BaseType::dump(strm);
strm << DapIndent::LMarg << "value: " << d_buf << endl;
DapIndent::UnIndent();
}
} // namespace libdap
BaseType
Crc32
Definition crc.h:45
Crc32::AddData
void AddData(const uint8_t *pData, const uint32_t length)
Definition crc.h:66
libdap::AttrTable
Contains the attributes for a dataset.
Definition AttrTable.h:150
libdap::Byte
Holds a single byte.
Definition Byte.h:59
libdap::Byte::d4_ops
bool d4_ops(BaseType *b, int op) override
Definition Byte.cc:257
libdap::Byte::Byte
Byte(const string &n)
The Byte constructor.
Definition Byte.cc:86
libdap::Byte::deserialize
bool deserialize(UnMarshaller &um, DDS *, bool) override
Deserialize the char on stdin and put the result in _BUF.
Definition Byte.cc:142
libdap::Byte::dump
void dump(ostream &strm) const override
dumps information about this object
Definition Byte.cc:336
libdap::Byte::value
virtual dods_byte value() const
Definition Byte.cc:212
libdap::Byte::val2buf
unsigned int val2buf(void *val, bool reuse=false) override
Definition Byte.cc:172
libdap::Byte::set_value
virtual bool set_value(const dods_byte value)
Definition Byte.cc:203
libdap::Byte::transform_to_dap2
std::vector< BaseType * > * transform_to_dap2(AttrTable *parent_attr_table) override
DAP4 to DAP2 transform.
Definition Byte.cc:302
libdap::Byte::serialize
bool serialize(ConstraintEvaluator &eval, DDS &dds, Marshaller &m, bool ce_eval) override
Definition Byte.cc:122
libdap::ConstraintEvaluator
Evaluate a constraint expression.
Definition ConstraintEvaluator.h:41
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:300
libdap::D4StreamMarshaller
Marshaller that knows how to marshal/serialize dap data objects to a C++ iostream using DAP4's receiv...
Definition D4StreamMarshaller.h:71
libdap::D4StreamUnMarshaller
Read data from the stream made by D4StreamMarshaller.
Definition D4StreamUnMarshaller.h:65
libdap::DDS
Definition DDS.h:176
libdap::DMR
Definition DMR.h:56
libdap::Error
A class for error processing.
Definition Error.h:92
libdap::Float32
Holds a 32-bit floating point value.
Definition Float32.h:59
libdap::Float64
Holds a 64-bit (double precision) floating point value.
Definition Float64.h:58
libdap::Int16
Holds a 16-bit signed integer value.
Definition Int16.h:57
libdap::Int32
Holds a 32-bit signed integer.
Definition Int32.h:63
libdap::Int64
Holds a64-bit signed integer.
Definition Int64.h:48
libdap::Int8
Holds an 8-bit signed integer value.
Definition Int8.h:41
libdap::InternalErr
A class for software fault reporting.
Definition InternalErr.h:61
libdap::Marshaller
abstract base class used to marshal/serialize dap data objects
Definition Marshaller.h:50
libdap::UInt16
Holds an unsigned 16-bit integer.
Definition UInt16.h:55
libdap::UInt32
Holds a 32-bit unsigned integer.
Definition UInt32.h:57
libdap::UInt64
Holds a 64-bit unsigned integer.
Definition UInt64.h:47
libdap::UnMarshaller
abstract base class used to unmarshall/deserialize dap data objects
Definition UnMarshaller.h:53
libdap
top level DAP object to house generic methods
Definition AlarmHandler.h:35
libdap::read_p
virtual bool read_p()
Has this variable been read?
Definition BaseType.cc:410
libdap::Cmp
bool Cmp(int op, T1 v1, T2 v2)
Definition Operators.h:52
libdap::width
virtual unsigned int width(bool constrained=false) const
Returns the width of the data, in bytes.
Definition Vector.h:191
libdap::print_val
virtual void print_val(FILE *out, string space="", bool print_decl_p=true)
Prints the value of the variable.
libdap::dataset
virtual string dataset() const
Returns the name of the dataset used to create this instance.
Definition BaseType.cc:326