/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI or Corporation for National Research Initiatives or
CNRI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

While CWI is the initial source for this software, a modified version
is made available by the Corporation for National Research Initiatives
(CNRI) at the Internet address ftp://ftp.python.org.

STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.

******************************************************************/

/* SaneDev objects */

#include "Python.h"
#include "Imaging.h"
#include <sane/sane.h>

static PyObject *ErrorObject;

typedef struct {
	PyObject_HEAD
	SANE_Handle h;
} SaneDevObject;

/* Raise a SANE exception */
PyObject * 
PySane_Error(st)
     SANE_Status st;
{
  char *string;
  
  if (st==SANE_STATUS_GOOD) {Py_INCREF(Py_None); return (Py_None);}
  string=sane_strstatus(st);
  PyErr_SetString(ErrorObject, string);
  return NULL;
}

staticforward PyTypeObject SaneDev_Type;

#define SaneDevObject_Check(v)	((v)->ob_type == &SaneDev_Type)

static SaneDevObject *
newSaneDevObject(arg)
	PyObject *arg;
{
	SaneDevObject *self;
	self = PyObject_NEW(SaneDevObject, &SaneDev_Type);
	if (self == NULL)
		return NULL;
	self->h=NULL;
	return self;
}

/* SaneDev methods */

static void
SaneDev_dealloc(self)
	SaneDevObject *self;
{
  if (self->h) sane_close(self->h);
  self->h=NULL;
  PyMem_DEL(self);
}

static PyObject *
SaneDev_get_parameters(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st;
  SANE_Parameters p;
  char *format="unknown format";
  
  if (!PyArg_ParseTuple(args, ""))
    return NULL;
  st=sane_get_parameters(self->h, &p);
  if (st) return PySane_Error(st);
  switch (p.format)
    {
    case(SANE_FRAME_GRAY): format="L"; break;
    case(SANE_FRAME_RGB): format="RGB"; break;
    case(SANE_FRAME_RED): format="R"; break;
    case(SANE_FRAME_GREEN): format="G"; break;
    case(SANE_FRAME_BLUE): format="B"; break;
    }
  
  return Py_BuildValue("si(ii)ii", format, p.last_frame, p.pixels_per_line, p.lines, 
		       p.depth, p.bytes_per_line);
}


static PyObject *
SaneDev_fileno(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st;
  SANE_Int fd;
  
  if (!PyArg_ParseTuple(args, ""))
    return NULL;
  st=sane_get_select_fd(self->h, &fd);
  if (st) return PySane_Error(st);
  return PyInt_FromLong(fd);
}

static PyObject *
SaneDev_start(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st;
  
  if (!PyArg_ParseTuple(args, ""))
    return NULL;
  st=sane_start(self->h);
  if (st) return PySane_Error(st);
  Py_INCREF(Py_None);
  return Py_None;
}

static PyObject *
SaneDev_cancel(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  if (!PyArg_ParseTuple(args, ""))
    return NULL;
  sane_cancel(self->h);
  Py_INCREF(Py_None);
  return Py_None;
}

static PyObject *
SaneDev_get_options(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Option_Descriptor *d;
  PyObject *list, *value;
  int i=1;
  
  if (!PyArg_ParseTuple(args, ""))
    return NULL;
  if (!(list = PyList_New(0)))
	    return NULL;

  do 
    {
      d=sane_get_option_descriptor(self->h, i);
      if (d!=NULL) 
	{
	  PyObject *constraint;
	  int j;
	  
	  switch (d->constraint_type)
	    {
	    case(SANE_CONSTRAINT_NONE): Py_INCREF(Py_None); constraint=Py_None; break;
	    case(SANE_CONSTRAINT_RANGE): 
	      constraint=Py_BuildValue("iii", d->constraint.range->min, d->constraint.range->max, d->constraint.range->quant);
	      break;
	    case(SANE_CONSTRAINT_WORD_LIST): 
	      constraint=PyList_New(d->constraint.word_list[0]);
	      for (j=1; j<=d->constraint.word_list[0]; j++)
		PyList_SetItem(constraint, j-1, PyInt_FromLong(d->constraint.word_list[j]));
	      break;
	    case(SANE_CONSTRAINT_STRING_LIST): 
	      constraint=PyList_New(0);
	      for(j=0; d->constraint.string_list[j]!=NULL; j++)
		PyList_Append(constraint, PyString_FromString(d->constraint.string_list[j]) );
	      break;
	    }
	  value=Py_BuildValue("isssiiiiO", i, d->name, d->title, d->desc, d->type,
			      d->unit, d->size, d->cap, constraint);
	  PyList_Append(list, value);
	}
      i++;
    } while (d!=NULL);
  return list;
}

static PyObject *
SaneDev_get_option(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st;
  SANE_Option_Descriptor *d;
  SANE_Int i;
  PyObject *value;
  int n;
  void *v;
  
  if (!PyArg_ParseTuple(args, "i", &n))
    return NULL;
  d=sane_get_option_descriptor(self->h, n);
  v=malloc(d->size+1);
  st=sane_control_option(self->h, n, SANE_ACTION_GET_VALUE,
			 v, &i);

  if (st) {free(v); return PySane_Error(st);}
  
  switch(d->type)
    {
    case(SANE_TYPE_BOOL):
    case(SANE_TYPE_INT):
      value=Py_BuildValue("ii", i, *( (SANE_Int*)v) );
      break;
    case(SANE_TYPE_FIXED):
      value=Py_BuildValue("id", i, SANE_UNFIX((*((SANE_Fixed*)v))) );
      break;
    case(SANE_TYPE_STRING):
      value=Py_BuildValue("is", i, v);
      break;
    case(SANE_TYPE_BUTTON):
    case(SANE_TYPE_GROUP):
      value=Py_BuildValue("iO", i, Py_None);
      break;
    }
  
  free(v);
  return value;
}

static PyObject *
SaneDev_set_option(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st;
  SANE_Option_Descriptor *d;
  SANE_Int i;
  PyObject *value;
  int n;
  void *v;
  
  if (!PyArg_ParseTuple(args, "iO", &n, &value))
    return NULL;
  d=sane_get_option_descriptor(self->h, n);
  v=malloc(d->size+1);

  switch(d->type)
    {
    case(SANE_TYPE_BOOL):
      if (!PyInt_Check(value)) 
	{
	  PyErr_SetString(PyExc_TypeError, "SANE_BOOL requires an integer");
	  free(v);
	  return NULL;
	}
	/* fall through */
    case(SANE_TYPE_INT):
      if (!PyInt_Check(value)) 
	{
	  PyErr_SetString(PyExc_TypeError, "SANE_INT requires an integer");
	  free(v);
	  return NULL;
	}
      *( (SANE_Int*)v) = PyInt_AsLong(value);
      break;
    case(SANE_TYPE_FIXED):
      if (!PyFloat_Check(value)) 
	{
	  PyErr_SetString(PyExc_TypeError, "SANE_FIXED requires a floating point number");
	  free(v);
	  return NULL;
	}
      *( (SANE_Fixed*)v) = SANE_FIX(PyFloat_AsDouble(value));
      break;
    case(SANE_TYPE_STRING):
      if (!PyString_Check(value)) 
	{
	  PyErr_SetString(PyExc_TypeError, "SANE_STRING requires a string");
	  free(v);
	  return NULL;
	}
      memcpy(v, PyString_AsString(value), PyString_Size(value));
      break;
    case(SANE_TYPE_BUTTON): 
    case(SANE_TYPE_GROUP):
      break;
    }
  
  st=sane_control_option(self->h, n, SANE_ACTION_SET_VALUE,
			 v, &i);
  if (st) {free(v); return PySane_Error(st);}
  
  free(v);
  return Py_BuildValue("i", i);
}

static PyObject *
SaneDev_set_auto_option(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st;
  SANE_Option_Descriptor *d;
  SANE_Int i;
  int n;
  
  if (!PyArg_ParseTuple(args, "i", &n))
    return NULL;
  d=sane_get_option_descriptor(self->h, n);
  st=sane_control_option(self->h, n, SANE_ACTION_SET_AUTO,
			 NULL, &i);
  if (st) {return PySane_Error(st);}
  
  return Py_BuildValue("i", i);
 }

static PyObject *
SaneDev_snap(self, args)
	SaneDevObject *self;
	PyObject *args;
{
  SANE_Status st; 
  SANE_Byte buffer[8192];  /* XXX how big should the buffer be? */
  SANE_Int len;
  Imaging im;
  SANE_Parameters p;
  char *format="unknown format";
  int px, py;
  long L;
  
  if (!PyArg_ParseTuple(args, "i", &L))
    return NULL;
  im=(Imaging)L;

  st=SANE_STATUS_GOOD; px=py=0;
  while (st!=SANE_STATUS_EOF)
    {
      st=sane_read(self->h, buffer, 8192, &len);
      if (st && (st!=SANE_STATUS_EOF)) return PySane_Error(st);
      if (st==SANE_STATUS_GOOD)
	{
	  if (p.format==SANE_FRAME_RGB) 
	    {
	    }
	  else
	    {
	      /* Handle some sort of 8-bit code */
	      /* XXX Optimize */
	      int i;
	      for (i=0; i<len && py <im->ysize; i++)
		{
		  im->image8[py][px]=buffer[i];
		  if (++px >= (int) im->xsize)
		    px = 0, py++;
		}
	    }
	}
    }

  Py_INCREF(Py_None);
  return Py_None;
}

static PyMethodDef SaneDev_methods[] = {
	{"get_parameters",	(PyCFunction)SaneDev_get_parameters,	1},

	{"get_options",	(PyCFunction)SaneDev_get_options,	1},
	{"get_option",	(PyCFunction)SaneDev_get_option,	1},
	{"set_option",	(PyCFunction)SaneDev_set_option,	1},
	{"set_auto_option",	(PyCFunction)SaneDev_set_auto_option,	1},

	{"start",	(PyCFunction)SaneDev_start,	1},
	{"cancel",	(PyCFunction)SaneDev_cancel,	1},
	{"snap",	(PyCFunction)SaneDev_snap,	1},
	{"fileno",	(PyCFunction)SaneDev_fileno,	1},
	{NULL,		NULL}		/* sentinel */
};

static PyObject *
SaneDev_getattr(self, name)
	SaneDevObject *self;
	char *name;
{
#if 0
	if (self->x_attr != NULL) {
		PyObject *v = PyDict_GetItemString(self->x_attr, name);
		if (v != NULL) {
			Py_INCREF(v);
			return v;
		}
	}
#endif
	return Py_FindMethod(SaneDev_methods, (PyObject *)self, name);
}

static int
SaneDev_setattr(self, name, v)
	SaneDevObject *self;
	char *name;
	PyObject *v;
{
#if 0
	if (self->x_attr == NULL) {
		self->x_attr = PyDict_New();
		if (self->x_attr == NULL)
			return -1;
	}
	if (v == NULL) {
		int rv = PyDict_DelItemString(self->x_attr, name);
		if (rv < 0)
			PyErr_SetString(PyExc_AttributeError,
			        "delete non-existing SaneDev attribute");
		return rv;
	}
	else
		return PyDict_SetItemString(self->x_attr, name, v);
#endif
}

staticforward PyTypeObject SaneDev_Type = {
	PyObject_HEAD_INIT(&PyType_Type)
	0,			/*ob_size*/
	"SaneDev",			/*tp_name*/
	sizeof(SaneDevObject),	/*tp_basicsize*/
	0,			/*tp_itemsize*/
	/* methods */
	(destructor)SaneDev_dealloc, /*tp_dealloc*/
	0,			/*tp_print*/
	(getattrfunc)SaneDev_getattr, /*tp_getattr*/
	(setattrfunc)SaneDev_setattr, /*tp_setattr*/
	0,			/*tp_compare*/
	0,			/*tp_repr*/
	0,			/*tp_as_number*/
	0,			/*tp_as_sequence*/
	0,			/*tp_as_mapping*/
	0,			/*tp_hash*/
};

/* --------------------------------------------------------------------- */

static PyObject *
PySane_init(self, args)
	PyObject *self; /* Not used */
	PyObject *args;
{
  SANE_Status st;
  SANE_Int version;
  
  if (!PyArg_ParseTuple(args, ""))
    return NULL;

  /* XXX Authorization is not yet supported */
  st=sane_init(&version, NULL); 
  if (st) return PySane_Error(st);
  return Py_BuildValue("iiii", version, SANE_VERSION_MAJOR(version),
		       SANE_VERSION_MINOR(version), SANE_VERSION_BUILD(version));
}

static PyObject *
PySane_exit(self, args)
	PyObject *self; /* Not used */
	PyObject *args;
{
  if (!PyArg_ParseTuple(args, ""))
    return NULL;

  sane_exit();
  Py_INCREF(Py_None);
  return Py_None;
}

static PyObject *
PySane_get_devices(self, args)
	PyObject *self; /* Not used */
	PyObject *args;
{
  const SANE_Device **devlist;
  SANE_Device *dev;
  SANE_Status st;
  PyObject *list;
  int local_only, i;
  
  if (!PyArg_ParseTuple(args, "|i", &local_only))
    {
      return NULL;
    }
  
  st=sane_get_devices(&devlist, local_only);
  if (st) return PySane_Error(st);
  if (!(list = PyList_New(0)))
	    return NULL;
  for(i=0; devlist[i]!=NULL; i++)
    {
      dev=devlist[i];
      PyList_Append(list, Py_BuildValue("ssss", dev->name, dev->vendor, dev->model, dev->type));
    }
  
  return list;
}

/* Function returning new SaneDev object */

static PyObject *
PySane_open(self, args)
        PyObject *self;
	PyObject *args;
{
	SaneDevObject *rv;
	SANE_Status st;
	char *name;

	if (!PyArg_ParseTuple(args, "s", &name))
		return NULL;
	rv = newSaneDevObject();
	if ( rv == NULL )
	    return NULL;
	st = sane_open(name, &(rv->h));
	if (st) 
	  {
	    Py_DECREF(rv);
	    return PySane_Error(st);
	  }
	return (PyObject *)rv;
}

static PyObject *
PySane_OPTION_IS_ACTIVE(self, args)
        PyObject *self;
	PyObject *args;
{
  SANE_Int cap;
  long lg;
  
  if (!PyArg_ParseTuple(args, "i", &lg))
    return NULL;
  cap=lg;
  return PyInt_FromLong( SANE_OPTION_IS_ACTIVE(cap));
}

static PyObject *
PySane_OPTION_IS_SETTABLE(self, args)
        PyObject *self;
	PyObject *args;
{
  SANE_Int cap;
  long lg;
  
  if (!PyArg_ParseTuple(args, "i", &lg))
    return NULL;
  cap=lg;
  return PyInt_FromLong( SANE_OPTION_IS_SETTABLE(cap));
}


/* List of functions defined in the module */

static PyMethodDef PySane_methods[] = {
	{"init",	PySane_init,		1},
	{"exit",	PySane_exit,		1},
	{"get_devices",	PySane_get_devices,	1},
	{"_open",	PySane_open,	1},
	{"OPTION_IS_ACTIVE",	PySane_OPTION_IS_ACTIVE,	1},
	{"OPTION_IS_SETTABLE",	PySane_OPTION_IS_SETTABLE,	1},
	{NULL,		NULL}		/* sentinel */
};


static void
insint(d, name, value)
     PyObject *d;
     char *name;
     int value;
{
	PyObject *v = PyInt_FromLong((long) value);
	if (!v || PyDict_SetItemString(d, name, v))
		Py_FatalError("can't initialize sane module");

	Py_DECREF(v);
}

void
init_sane()
{
	PyObject *m, *d;

	/* Create the module and add the functions */
	m = Py_InitModule("_sane", PySane_methods);

	/* Add some symbolic constants to the module */
	d = PyModule_GetDict(m);
	ErrorObject = PyString_FromString("_sane.error");
	PyDict_SetItemString(d, "error", ErrorObject);

	insint(d, "INFO_INEXACT", SANE_INFO_INEXACT);
	insint(d, "INFO_RELOAD_OPTIONS", SANE_INFO_RELOAD_OPTIONS);
	insint(d, "RELOAD_PARAMS", SANE_INFO_RELOAD_PARAMS);

	insint(d, "FRAME_GRAY", SANE_FRAME_GRAY);
	insint(d, "FRAME_RGB", SANE_FRAME_RGB);
	insint(d, "FRAME_RED", SANE_FRAME_RED);
	insint(d, "FRAME_GREEN", SANE_FRAME_GREEN);
	insint(d, "FRAME_BLUE", SANE_FRAME_BLUE);

	insint(d, "CONSTRAINT_NONE", SANE_CONSTRAINT_NONE);
	insint(d, "CONSTRAINT_RANGE", SANE_CONSTRAINT_RANGE);
	insint(d, "CONSTRAINT_WORD_LIST", SANE_CONSTRAINT_WORD_LIST);
	insint(d, "CONSTRAINT_STRING_LIST", SANE_CONSTRAINT_STRING_LIST);

	insint(d, "TYPE_BOOL", SANE_TYPE_BOOL);
	insint(d, "TYPE_INT", SANE_TYPE_INT);
	insint(d, "TYPE_FIXED", SANE_TYPE_FIXED);
	insint(d, "TYPE_STRING", SANE_TYPE_STRING);
	insint(d, "TYPE_BUTTON", SANE_TYPE_BUTTON);
	insint(d, "TYPE_GROUP", SANE_TYPE_GROUP);

	insint(d, "UNIT_NONE", SANE_UNIT_NONE);
	insint(d, "UNIT_PIXEL", SANE_UNIT_PIXEL);
	insint(d, "UNIT_BIT", SANE_UNIT_BIT);
	insint(d, "UNIT_MM", SANE_UNIT_MM);
	insint(d, "UNIT_DPI", SANE_UNIT_DPI);
	insint(d, "UNIT_PERCENT", SANE_UNIT_PERCENT);

	insint(d, "CAP_SOFT_SELECT", SANE_CAP_SOFT_SELECT);
	insint(d, "CAP_HARD_SELECT", SANE_CAP_HARD_SELECT);
	insint(d, "CAP_SOFT_DETECT", SANE_CAP_SOFT_DETECT);
	insint(d, "CAP_EMULATED", SANE_CAP_EMULATED);
	insint(d, "CAP_AUTOMATIC", SANE_CAP_AUTOMATIC);
	insint(d, "CAP_INACTIVE", SANE_CAP_INACTIVE);
	insint(d, "CAP_ADVANCED", SANE_CAP_ADVANCED);

	/* Check for errors */
	if (PyErr_Occurred())
		Py_FatalError("can't initialize module _sane");
}