pyobject.cc File Reference

#include "kernel/mod2.h"
#include "omalloc/omalloc.h"
#include "misc/intvec.h"
#include "Singular/subexpr.h"
#include "Singular/ipid.h"
#include "Singular/blackbox.h"
#include "Singular/lists.h"
#include "Singular/ipshell.h"
#include "Singular/newstruct.h"
#include "resources/feResource.h"
#include "Singular/mod_lib.h"
#include <Python.h>

Go to the source code of this file.

Data Structures
class	PythonInterpreter
	This class initializes and finalized the python interpreter. More...
class	PythonObject
	This class defines an interface for calling PyObject from Singular. More...
struct	PythonObject::sequence_tag
class	PythonCastStatic< CastType >
	This template class does conversion of Singular objects to python objects on compile-time. More...
class	PythonCastDynamic
	This class does conversion of Singular objects to python objects on runtime. More...
class	PythonCastStatic< PythonObject::sequence_tag >
	Template specialization for getting handling sequence. More...

Macros
#define	PYOBJECT_ADD_C_PROC(name)

Functions
void	sync_contexts ()
	getting stuff from python to Singular namespace More...
PythonObject	get_attrib_name (leftv arg)
PythonObject	python_eval (const char *arg)
	Evaluate string in python. More...
BOOLEAN	python_eval (leftv result, leftv arg)
	Evaluate string in python from Singular. More...
BOOLEAN	python_run (leftv result, leftv arg)
	Execute string in python from Singular. More...
PythonObject	names_from_module (const char *module_name)
void	from_module_import_all (const char *module_name)
BOOLEAN	python_import (leftv result, leftv value)
	import python module and export identifiers in Singular namespace More...
void *	pyobject_Init (blackbox *)
	blackbox support - initialization More...
char *	pyobject_String (blackbox *, void *ptr)
	blackbox support - convert to string representation More...
void *	pyobject_Copy (blackbox *, void *ptr)
	blackbox support - copy element More...
BOOLEAN	pyobject_Assign (leftv l, leftv r)
	blackbox support - assign element More...
BOOLEAN	pyobject_Op1 (int op, leftv res, leftv head)
	blackbox support - unary operations More...
BOOLEAN	pyobject_Op2 (int op, leftv res, leftv arg1, leftv arg2)
	blackbox support - binary operations More...
BOOLEAN	pyobject_Op3 (int op, leftv res, leftv arg1, leftv arg2, leftv arg3)
	blackbox support - ternary operations More...
BOOLEAN	pyobject_OpM (int op, leftv res, leftv args)
	blackbox support - n-ary operations More...
void	pyobject_destroy (blackbox *, void *ptr)
	blackbox support - destruction More...
PyObject *	get_current_definition (const char *name)
blackbox *	pyobject_blackbox (int &tok)
int SI_MOD_INIT()	pyobject (SModulFunctions *psModulFunctions)

Detailed Description

Author

Alexander Dreyer

Date

2010-12-15

This file defines the blackbox operations for the pyobject type.

Copyright:

(c) 2010 by The Singular Team, see LICENSE file

Definition in file pyobject.cc.

---

Data Structure Documentation

PythonObject::sequence_tag

struct PythonObject::sequence_tag

Definition at line 113 of file pyobject.cc.

Macro Definition Documentation

PYOBJECT_ADD_C_PROC

#define PYOBJECT_ADD_C_PROC

(

name

)

Value:

  psModulFunctions->iiAddCproc((currPack->libname? currPack->libname: ""),\
     (char*)#name, FALSE, name);

Definition at line 713 of file pyobject.cc.

Function Documentation

from_module_import_all()

void from_module_import_all

(

const char *

module_name

)

Definition at line 470 of file pyobject.cc.

{
  char buffer[strlen(module_name) + 20];
  sprintf (buffer, "from %s import *", module_name);
  PyRun_SimpleString(buffer);
}

get_attrib_name()

PythonObject get_attrib_name

(

leftv

arg

)

Definition at line 414 of file pyobject.cc.

{
  typedef PythonCastStatic<const char*> result_type;
  if (arg->Typ() == STRING_CMD)
    return result_type(arg);
 
  return result_type((void*)arg->Name());
}

get_current_definition()

PyObject * get_current_definition

(

const char *

name

)

Definition at line 654 of file pyobject.cc.

                                                   {
  idhdl handle =  ggetid(name);
  if (!handle || (IDTYP(handle) != PythonInterpreter::id()))  return NULL;
  PythonCastStatic<PyObject*> value(IDDATA(handle));
  return value;
}

names_from_module()

PythonObject names_from_module

(

const char *

module_name

)

Definition at line 459 of file pyobject.cc.

{
  char buffer[strlen(module_name) + 30];
  sprintf (buffer, "SINGULAR_MODULE_NAME = '%s'", module_name);
  PyRun_SimpleString(buffer);
  PyRun_SimpleString("from sys import modules");
  PyRun_SimpleString("exec('from ' + SINGULAR_MODULE_NAME + ' import *')");
 
  return python_eval("[str for str in dir(modules[SINGULAR_MODULE_NAME]) if str[0] != '_']");
}

pyobject()

int SI_MOD_INIT() pyobject

(

SModulFunctions *

psModulFunctions

)

Definition at line 717 of file pyobject.cc.

{
  int tok = -1;
  blackbox* bbx = pyobject_blackbox(tok);
  if (bbx->blackbox_Init != pyobject_Init)
  {
    bbx->blackbox_destroy = pyobject_destroy;
    bbx->blackbox_String  = pyobject_String;
    bbx->blackbox_Init    = pyobject_Init;
    bbx->blackbox_Copy    = pyobject_Copy;
    bbx->blackbox_Assign  = pyobject_Assign;
    bbx->blackbox_Op1     = pyobject_Op1;
    bbx->blackbox_Op2     = pyobject_Op2;
    bbx->blackbox_Op3     = pyobject_Op3;
    bbx->blackbox_OpM     = pyobject_OpM;
    bbx->data             = (void*)omAlloc0(newstruct_desc_size());
 
    PythonInterpreter::init(tok);
 
    PYOBJECT_ADD_C_PROC(python_import);
    PYOBJECT_ADD_C_PROC(python_eval);
    PYOBJECT_ADD_C_PROC(python_run);
  }
  return MAX_TOK;
}

pyobject_Assign()

BOOLEAN pyobject_Assign	(	leftv	l,
		leftv	r
	)

blackbox support - assign element

Definition at line 514 of file pyobject.cc.

{
  Py_XDECREF(l->Data());
  PyObject* result = PythonCastDynamic(r);
  Py_XINCREF(result);
 
  if (l->rtyp == IDHDL)
    IDDATA((idhdl)l->data) = (char *)result;
  else
    l->data = (void *)result;
 
  return !result;
}

pyobject_blackbox()

blackbox * pyobject_blackbox

(

int &

tok

)

Definition at line 702 of file pyobject.cc.

                                      {
  if(blackboxIsCmd("pyobject", tok) != ROOT_DECL)
  {
    tok = setBlackboxStuff((blackbox*)omAlloc0(sizeof(blackbox)),
                           "pyobject");
  }
  return getBlackboxStuff(tok);
}

pyobject_Copy()

void * pyobject_Copy	(	blackbox *	,
		void *	ptr
	)

blackbox support - copy element

Definition at line 507 of file pyobject.cc.

{
    Py_XINCREF(ptr);
    return ptr;
}

pyobject_destroy()

void pyobject_destroy	(	blackbox *	,
		void *	ptr
	)

blackbox support - destruction

Definition at line 649 of file pyobject.cc.

{
  Py_XDECREF(ptr);
}

pyobject_Init()

void * pyobject_Init

(

blackbox *

)

blackbox support - initialization

Definition at line 494 of file pyobject.cc.

{
  Py_INCREF(Py_None);
  return Py_None;
}

pyobject_Op1()

BOOLEAN pyobject_Op1	(	int	op,
		leftv	res,
		leftv	head
	)

blackbox support - unary operations

Definition at line 530 of file pyobject.cc.

{
  switch(op)
  {
    case INT_CMD:               // built-in return types first
    {
      long value = PyInt_AsLong(PythonCastStatic<>(head));
      if( (value == -1) &&  PyErr_Occurred() )
      {
        WerrorS("'pyobject` cannot be converted to integer");
        PyErr_Clear();
        return TRUE;
      }
      res->data = (void*) value;
      res->rtyp = INT_CMD;
      return FALSE;
    }
    case TYPEOF_CMD:
      res->data = (void*) omStrDup("pyobject");
      res->rtyp = STRING_CMD;
      return FALSE;
  }
 
  if (!PythonCastStatic<>(head)(op).assign_to(res))
    return FALSE;
 
  BOOLEAN newstruct_Op1(int, leftv, leftv); // forward declaration
  return newstruct_Op1(op, res, head);
}

pyobject_Op2()

BOOLEAN pyobject_Op2	(	int	op,
		leftv	res,
		leftv	arg1,
		leftv	arg2
	)

blackbox support - binary operations

Definition at line 562 of file pyobject.cc.

{
  PythonCastStatic<> lhs(arg1);
 
  switch(op)                    // built-in return types and special cases first
  {
    case '<': case '>': case EQUAL_EQUAL: case NOTEQUAL: case GE: case LE:
    {
      res->data = (void *)(long)(lhs.compare(op, PythonCastDynamic(arg2)));
      res->rtyp = INT_CMD;
      return FALSE;
    }
    case '.': case COLONCOLON: case ATTRIB_CMD:
      return lhs.attr(get_attrib_name(arg2)).assign_to(res);
  }
 
  PythonCastDynamic rhs(arg2);
  if (!lhs(op, rhs).assign_to(res))
    return FALSE;
 
  BOOLEAN newstruct_Op2(int, leftv, leftv, leftv); // forward declaration
  return newstruct_Op2(op, res, arg1, arg2);
 
}

pyobject_Op3()

BOOLEAN pyobject_Op3	(	int	op,
		leftv	res,
		leftv	arg1,
		leftv	arg2,
		leftv	arg3
	)

blackbox support - ternary operations

Definition at line 588 of file pyobject.cc.

{
  PythonCastStatic<> lhs(arg1);
  PythonCastDynamic rhs1(arg2);
  PythonCastDynamic rhs2(arg3);
 
  if (!lhs(op, rhs1, rhs2).assign_to(res))
    return FALSE;
 
  return blackboxDefaultOp3(op, res, arg1, arg2, arg3);
}

pyobject_OpM()

BOOLEAN pyobject_OpM	(	int	op,
		leftv	res,
		leftv	args
	)

blackbox support - n-ary operations

Definition at line 602 of file pyobject.cc.

{
  switch(op)                    // built-in return types first
  {
    case STRING_CMD:
    {
      blackbox* a = getBlackboxStuff(args->Typ());
      res->data = (void *)a->blackbox_String(a, args->Data());
      res->rtyp = STRING_CMD;
      return FALSE;
    }
 
    case INTVEC_CMD:
      PythonObject obj = PythonCastStatic<>(args->Data());
      unsigned long len = obj.size();
 
      intvec* vec = new intvec(len);
      for(unsigned long idx = 0; idx != len; ++idx)
      {
        long value = PyInt_AsLong(obj[idx]);
        (*vec)[idx] = static_cast<int>(value);
 
        if ((value == -1) &&  PyErr_Occurred())
        {
          value = 0;
          PyErr_Clear();
        }
        if (value != long((*vec)[idx]))
        {
          delete vec;
          WerrorS("'pyobject` cannot be converted to intvec");
          return TRUE;
        }
      }
      res->data = (void *)vec;
      res->rtyp = op;
      return FALSE;
  }
  typedef PythonCastStatic<PythonObject::sequence_tag> seq_type;
  if (! PythonCastStatic<>(args)(op, seq_type(args->next)).assign_to(res))
    return FALSE;
 
  BOOLEAN newstruct_OpM(int, leftv, leftv); // forward declaration
  return newstruct_OpM(op, res, args);
}

pyobject_String()

char * pyobject_String	(	blackbox *	,
		void *	ptr
	)

blackbox support - convert to string representation

Definition at line 501 of file pyobject.cc.

{
  return PythonCastStatic<>(ptr).repr();
}

python_eval() [1/2]

PythonObject python_eval

(

const char *

arg

)

Evaluate string in python.

Definition at line 424 of file pyobject.cc.

{
  PyObject* globals = PyModule_GetDict(PyImport_Import(PyString_FromString("__main__")));
  return PyRun_String(arg, Py_eval_input, globals, globals);
}

python_eval() [2/2]

BOOLEAN python_eval	(	leftv	result,
		leftv	arg
	)

Evaluate string in python from Singular.

Definition at line 431 of file pyobject.cc.

{
  if ( !arg || (arg->Typ() != STRING_CMD) )
  {
    WerrorS("expected python_eval('string')");
    return TRUE;
  }
 
  return python_eval(reinterpret_cast<const char*>(arg->Data())).assign_to(result);
}

python_import()

BOOLEAN python_import	(	leftv	result,
		leftv	value
	)

import python module and export identifiers in Singular namespace

Definition at line 478 of file pyobject.cc.

{
  if ((value == NULL) || (value->Typ()!= STRING_CMD))
  {
    WerrorS("expected python_import('string')");
    return TRUE;
  }
 
  from_module_import_all(reinterpret_cast<const char*>(value->Data()));
  sync_contexts();
 
  Py_INCREF(Py_None);
  return PythonCastStatic<>(Py_None).assign_to(result);
}

python_run()

BOOLEAN python_run	(	leftv	result,
		leftv	arg
	)

Execute string in python from Singular.

Definition at line 444 of file pyobject.cc.

{
  if ( !arg || (arg->Typ() != STRING_CMD) )
  {
    WerrorS("expected python_run('string')");
    return TRUE;
  }
 
  PyRun_SimpleString(reinterpret_cast<const char*>(arg->Data()));
  sync_contexts();
 
  Py_INCREF(Py_None);
  return PythonCastStatic<>(Py_None).assign_to(result);
}

sync_contexts()

void sync_contexts

(

)

getting stuff from python to Singular namespace

Definition at line 662 of file pyobject.cc.

{
  PyRun_SimpleString("_SINGULAR_NEW = modules['__main__'].__dict__.copy()");
 
  PythonObject newElts = python_eval("[(_k, _e)   \
    for (_k, _e) in _SINGULAR_NEW.iteritems() \
    if _k not in _SINGULAR_IMPORTED or not _SINGULAR_IMPORTED[_k] is _e]");
 
  long len = newElts.size();
  for (long idx = 0; idx < len; ++idx)
  {
    long i = 0;
    char* name = newElts[idx][i].str();
    if (name && (*name != '\0') && (*name != '_'))
    {
      Py_XDECREF(get_current_definition(name));
      i = 1;
      newElts[idx][i].import_as(name);
    }
 
  }
 
  PythonObject deletedElts =
    python_eval("list(set(_SINGULAR_IMPORTED.iterkeys()) - \
     set(_SINGULAR_NEW.iterkeys()))");
  len = deletedElts.size();
 
  for (long idx = 0; idx < len; ++idx)
  {
    char* name = deletedElts[idx].str();
    if (name && (*name != '\0') && (*name != '_'))
      killid(name, &IDROOT);
  }
 
  PyRun_SimpleString("_SINGULAR_IMPORTED =_SINGULAR_NEW");
  PyRun_SimpleString("del  _SINGULAR_NEW");
}