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|
/*-----------------------------------------------------------------------------
| Copyright (c) 2013-2019, Nucleic Development Team.
|
| Distributed under the terms of the Modified BSD License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
#pragma once
#include <map>
#include <string>
#include <cppy/cppy.h>
#include <kiwi/kiwi.h>
#include "types.h"
namespace kiwisolver
{
inline bool
convert_to_double( PyObject* obj, double& out )
{
if( PyFloat_Check( obj ) )
{
out = PyFloat_AS_DOUBLE( obj );
return true;
}
if( PyLong_Check( obj ) )
{
out = PyLong_AsDouble( obj );
if( out == -1.0 && PyErr_Occurred() )
return false;
return true;
}
cppy::type_error( obj, "float, int, or long" );
return false;
}
inline bool
convert_pystr_to_str( PyObject* value, std::string& out )
{
out = PyUnicode_AsUTF8( value );
return true;
}
inline bool
convert_to_strength( PyObject* value, double& out )
{
if( PyUnicode_Check( value ) )
{
std::string str;
if( !convert_pystr_to_str( value, str ) )
return false;
if( str == "required" )
out = kiwi::strength::required;
else if( str == "strong" )
out = kiwi::strength::strong;
else if( str == "medium" )
out = kiwi::strength::medium;
else if( str == "weak" )
out = kiwi::strength::weak;
else
{
PyErr_Format(
PyExc_ValueError,
"string strength must be 'required', 'strong', 'medium', "
"or 'weak', not '%s'",
str.c_str()
);
return false;
}
return true;
}
if( !convert_to_double( value, out ) )
return false;
return true;
}
inline bool
convert_to_relational_op( PyObject* value, kiwi::RelationalOperator& out )
{
if( !PyUnicode_Check( value ) )
{
cppy::type_error( value, "str" );
return false;
}
std::string str;
if( !convert_pystr_to_str( value, str ) )
return false;
if( str == "==" )
out = kiwi::OP_EQ;
else if( str == "<=" )
out = kiwi::OP_LE;
else if( str == ">=" )
out = kiwi::OP_GE;
else
{
PyErr_Format(
PyExc_ValueError,
"relational operator must be '==', '<=', or '>=', not '%s'",
str.c_str()
);
return false;
}
return true;
}
inline PyObject*
make_terms( const std::map<PyObject*, double>& coeffs )
{
typedef std::map<PyObject*, double>::const_iterator iter_t;
cppy::ptr terms( PyTuple_New( coeffs.size() ) );
if( !terms )
return 0;
Py_ssize_t size = PyTuple_GET_SIZE( terms.get() );
for( Py_ssize_t i = 0; i < size; ++i ) // zero tuple for safe early return
PyTuple_SET_ITEM( terms.get(), i, 0 );
Py_ssize_t i = 0;
iter_t it = coeffs.begin();
iter_t end = coeffs.end();
for( ; it != end; ++it, ++i )
{
PyObject* pyterm = PyType_GenericNew( Term::TypeObject, 0, 0 );
if( !pyterm )
return 0;
Term* term = reinterpret_cast<Term*>( pyterm );
term->variable = cppy::incref( it->first );
term->coefficient = it->second;
PyTuple_SET_ITEM( terms.get(), i, pyterm );
}
return terms.release();
}
inline PyObject*
reduce_expression( PyObject* pyexpr ) // pyexpr must be an Expression
{
Expression* expr = reinterpret_cast<Expression*>( pyexpr );
std::map<PyObject*, double> coeffs;
Py_ssize_t size = PyTuple_GET_SIZE( expr->terms );
for( Py_ssize_t i = 0; i < size; ++i )
{
PyObject* item = PyTuple_GET_ITEM( expr->terms, i );
Term* term = reinterpret_cast<Term*>( item );
coeffs[ term->variable ] += term->coefficient;
}
cppy::ptr terms( make_terms( coeffs ) );
if( !terms )
return 0;
PyObject* pynewexpr = PyType_GenericNew( Expression::TypeObject, 0, 0 );
if( !pynewexpr )
return 0;
Expression* newexpr = reinterpret_cast<Expression*>( pynewexpr );
newexpr->terms = terms.release();
newexpr->constant = expr->constant;
return pynewexpr;
}
inline kiwi::Expression
convert_to_kiwi_expression( PyObject* pyexpr ) // pyexpr must be an Expression
{
Expression* expr = reinterpret_cast<Expression*>( pyexpr );
std::vector<kiwi::Term> kterms;
Py_ssize_t size = PyTuple_GET_SIZE( expr->terms );
for( Py_ssize_t i = 0; i < size; ++i )
{
PyObject* item = PyTuple_GET_ITEM( expr->terms, i );
Term* term = reinterpret_cast<Term*>( item );
Variable* var = reinterpret_cast<Variable*>( term->variable );
kterms.push_back( kiwi::Term( var->variable, term->coefficient ) );
}
return kiwi::Expression( kterms, expr->constant );
}
inline const char*
pyop_str( int op )
{
switch( op )
{
case Py_LT:
return "<";
case Py_LE:
return "<=";
case Py_EQ:
return "==";
case Py_NE:
return "!=";
case Py_GT:
return ">";
case Py_GE:
return ">=";
default:
return "";
}
}
} // namespace kiwisolver
|
