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cpython/RISCOS/Modules/swimodule.c

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/* swi
RISC OS swi functions
1.00 Chris Stretch
1.01 12 May 1999 Laurence Tratt
* Changed swi.error to be a class based exception rather than string based
* Added swi.ArgError which is generated for errors when the user passes invalid arguments to
functions etc
* Added "errnum" attribute to swi.error, so one can now check to see what the error number was
1.02 03 March 2002 Dietmar Schwertberger
* Added string, integer, integers, tuple and tuples
*/
#include "oslib/os.h"
#include <kernel.h>
#include "Python.h"
#define PyBlock_Check(op) ((op)->ob_type == &PyBlockType)
static PyObject *SwiError; /* Exception swi.error */
static PyObject *ArgError; /* Exception swi.ArgError */
static os_error *e;
static PyObject *swi_oserror(void)
{ PyErr_SetString(SwiError,e->errmess);
PyObject_SetAttrString(PyErr_Occurred(), "errnum", PyInt_FromLong(e->errnum));
return 0;
}
static PyObject *swi_error(char *s)
{ PyErr_SetString(ArgError,s);
return 0;
}
typedef struct
{ PyObject_HEAD
void *block;
int length; /*length in bytes*/
int heap;
} PyBlockObject;
static PyTypeObject PyBlockType;
/* block commands */
static PyObject *PyBlock_New(PyObject *self,PyObject *args)
{ int size;
PyBlockObject *b;
PyObject *init=0;
if(!PyArg_ParseTuple(args,"i|O",&size,&init)) return NULL;
if(size<1) size=1;
b=PyObject_NEW(PyBlockObject,&PyBlockType);
if(!b) return NULL;
b->block=malloc(4*size);
if(!b->block)
{ Py_DECREF(b);
return PyErr_NoMemory();
}
b->length=4*size;
b->heap=1;
if(init)
{ if(PyString_Check(init))
{ int n=PyString_Size(init);
if (n>4*size) n=4*size;
memcpy(b->block,PyString_AsString(init),n);
memset((char*)b->block+n,0,4*size-n);
}
else
{ int n,k;
long *p=(long*)b->block;
if(!PyList_Check(init)) goto fail;
n=PyList_Size(init);
if (n>size) n=size;
for(k=0;k<n;k++)
{ PyObject *q=PyList_GetItem(init,k);
if(!PyInt_Check(q)) goto fail;
p[k]=PyInt_AsLong(q);
}
for(;k<size;k++) p[k]=0;
}
}
return (PyObject *)b;
fail:PyErr_SetString(PyExc_TypeError,
"block initialiser must be string or list of integers");
Py_DECREF(b);
return NULL;
}
static PyObject *PyRegister(PyObject *self,PyObject *args)
{ int size,ptr;
PyBlockObject *b;
if(!PyArg_ParseTuple(args,"ii",&size,&ptr)) return NULL;
if(size<1) size=1;
b=PyObject_NEW(PyBlockObject,&PyBlockType);
if(!b) return NULL;
b->block=(void*)ptr;
b->length=4*size;
b->heap=0;
return (PyObject *)b;
}
static PyObject *PyBlock_ToString(PyBlockObject *self,PyObject *arg)
{ int s=0,e=self->length;
if(!PyArg_ParseTuple(arg,"|ii",&s,&e)) return NULL;
if(s<0||e>self->length||s>e)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
return PyString_FromStringAndSize((char*)self->block+s,e-s);
}
static PyObject *PyBlock_NullString(PyBlockObject *self,PyObject *arg)
{ int s=0,e=self->length,i;
char *p=(char*)self->block;
if(!PyArg_ParseTuple(arg,"|ii",&s,&e)) return NULL;
if(s<0||e>self->length||s>e)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
for(i=s;i<e;i++) if(p[i]==0) break;
return PyString_FromStringAndSize((char*)self->block+s,i-s);
}
static PyObject *PyBlock_CtrlString(PyBlockObject *self,PyObject *arg)
{ int s=0,e=self->length,i;
char *p=(char*)self->block;
if(!PyArg_ParseTuple(arg,"|ii",&s,&e)) return NULL;
if(s<0||e>self->length||s>e)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
for(i=s;i<e;i++) if(p[i]<32) break;
return PyString_FromStringAndSize((char*)self->block+s,i-s);
}
static PyObject *PyBlock_PadString(PyBlockObject *self,PyObject *arg)
{ int s=0,e=self->length,n,m;
char *str;
char c;
char *p=(char*)self->block;
if(!PyArg_ParseTuple(arg,"s#c|ii",&str,&n,&c,&s,&e)) return NULL;
if(s<0||e>self->length||s>e)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
m=e-s;
if(n>m) n=m;
memcpy(p+s,str,n);memset(p+s+n,c,m-n);
Py_INCREF(Py_None);return Py_None;
}
static PyObject *PyBlock_BitSet(PyBlockObject *self,PyObject *arg)
{ int i,x,y;
int *p=(int*)self->block;
if(!PyArg_ParseTuple(arg,"iii",&i,&x,&y)) return NULL;
if(i<0||i>=self->length/4)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
p[i]=(p[i]&y)^x;
Py_INCREF(Py_None);return Py_None;
}
static PyObject *PyBlock_Resize(PyBlockObject *self,PyObject *arg)
{ int n;
if(!PyArg_ParseTuple(arg,"i",&n)) return NULL;
if(n<1) n=1;
if(self->heap)
{ void *v=realloc(self->block,4*n);
if (!v) return PyErr_NoMemory();
self->block=v;
}
self->length=4*n;
Py_INCREF(Py_None);return Py_None;
}
static PyObject *PyBlock_ToFile(PyBlockObject *self,PyObject *arg)
{ int s=0,e=self->length/4;
PyObject *f;
FILE *fp;
if(!PyArg_ParseTuple(arg,"O|ii",&f,&s,&e)) return NULL;
fp=PyFile_AsFile(f);
if (!fp)
{ PyErr_SetString(PyExc_TypeError, "arg must be open file");
return NULL;
}
fwrite((int*)(self->block)+s,4,e-s,fp);
Py_INCREF(Py_None);return Py_None;
}
static struct PyMethodDef PyBlock_Methods[]=
{ { "tostring",(PyCFunction)PyBlock_ToString,1},
{ "padstring",(PyCFunction)PyBlock_PadString,1},
{ "nullstring",(PyCFunction)PyBlock_NullString,1},
{ "ctrlstring",(PyCFunction)PyBlock_CtrlString,1},
{ "bitset",(PyCFunction)PyBlock_BitSet,1},
{ "resize",(PyCFunction)PyBlock_Resize,1},
{ "tofile",(PyCFunction)PyBlock_ToFile,1},
{ NULL,NULL} /* sentinel */
};
static int block_len(PyBlockObject *b)
{ return b->length/4;
}
static PyObject *block_concat(PyBlockObject *b,PyBlockObject *c)
{ PyErr_SetString(PyExc_IndexError,"block concatenation not implemented");
return NULL;
}
static PyObject *block_repeat(PyBlockObject *b,Py_ssize_t i)
{ PyErr_SetString(PyExc_IndexError,"block repetition not implemented");
return NULL;
}
static PyObject *block_item(PyBlockObject *b,Py_ssize_t i)
{ if(i<0||4*i>=b->length)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
return PyInt_FromLong(((long*)(b->block))[i]);
}
static PyObject *block_slice(PyBlockObject *b,Py_ssize_t i,Py_ssize_t j)
{ Py_ssize_t n,k;
long *p=b->block;
PyObject *result;
if(j>b->length/4) j=b->length/4;
if(i<0||i>j)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return NULL;
}
n=j-i;
result=PyList_New(n);
for(k=0;k<n;k++) PyList_SetItem(result,k,PyInt_FromSsize_t(p[i+k]));
return result;
}
static int block_ass_item(PyBlockObject *b,Py_ssize_t i,PyObject *v)
{ if(i<0||i>=b->length/4)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return -1;
}
if(!PyInt_Check(v))
{ PyErr_SetString(PyExc_TypeError,"block item must be integer");
return -1;
}
((long*)(b->block))[i]=PyInt_AsLong(v);
return 0;
}
static int block_ass_slice(PyBlockObject *b,Py_ssize_t i,Py_ssize_t j,PyObject *v)
{ Py_ssize_t n,k;
long *p=b->block;
if(j>b->length/4) j=b->length/4;
if(i<0||i>j)
{ PyErr_SetString(PyExc_IndexError,"block index out of range");
return -1;
}
if(!PyList_Check(v)) goto fail;
n=PyList_Size(v);
if(n>j-i) n=j-i;
for(k=0;k<n;k++)
{ PyObject *q=PyList_GetItem(v,k);
if(!PyInt_Check(q)) goto fail;
p[i+k]=PyInt_AsLong(q);
}
for(;k<j-i;k++) p[i+k]=0;
return 0;
fail:PyErr_SetString(PyExc_TypeError,"block slice must be integer list");
return -1;
}
static PySequenceMethods block_as_sequence=
{ (inquiry)block_len, /*sq_length*/
(binaryfunc)block_concat, /*sq_concat*/
(ssizeargfunc)block_repeat, /*sq_repeat*/
(ssizeargfunc)block_item, /*sq_item*/
(ssizessizeargfunc)block_slice, /*sq_slice*/
(ssizeobjargproc)block_ass_item, /*sq_ass_item*/
(ssizessizeobjargproc)block_ass_slice, /*sq_ass_slice*/
};
static PyObject *PyBlock_GetAttr(PyBlockObject *s,char *name)
{
if (!strcmp(name, "length")) return PyInt_FromLong((long)s->length);
if (!strcmp(name, "start")) return PyInt_FromLong((long)s->block);
if (!strcmp(name,"end")) return PyInt_FromLong(((long)(s->block)+s->length));
if (!strcmp(name, "__members__"))
{ PyObject *list = PyList_New(3);
if (list)
{ PyList_SetItem(list, 0, PyString_FromString("length"));
PyList_SetItem(list, 1, PyString_FromString("start"));
PyList_SetItem(list, 2, PyString_FromString("end"));
if (PyErr_Occurred()) { Py_DECREF(list);list = NULL;}
}
return list;
}
return Py_FindMethod(PyBlock_Methods, (PyObject*) s,name);
}
static void PyBlock_Dealloc(PyBlockObject *b)
{
if(b->heap) {
if (b->heap)
;
else
PyMem_DEL(b->block);
}
PyMem_DEL(b);
}
static PyTypeObject PyBlockType=
{ PyObject_HEAD_INIT(&PyType_Type)
0, /*ob_size*/
"block", /*tp_name*/
sizeof(PyBlockObject), /*tp_size*/
0, /*tp_itemsize*/
/* methods */
(destructor)PyBlock_Dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)PyBlock_GetAttr, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
&block_as_sequence, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash*/
};
/* swi commands */
static PyObject *swi_swi(PyObject *self,PyObject *args)
{ PyObject *name,*format,*result,*v;
int swino,carry,rno=0,j,n;
char *swiname,*fmt,*outfmt;
_kernel_swi_regs r;
PyBlockObject *ao;
if(args==NULL||!PyTuple_Check(args)||(n=PyTuple_Size(args))<2)
{ PyErr_BadArgument(); return NULL;}
name=PyTuple_GetItem(args,0);
if(!PyArg_Parse(name,"i",&swino))
{ PyErr_Clear();
if(!PyArg_Parse(name,"s",&swiname)) return NULL;
e=xos_swi_number_from_string(swiname,&swino);
if(e) return swi_oserror();
}
format=PyTuple_GetItem(args,1);
if(!PyArg_Parse(format,"s",&fmt)) return NULL;
j=2;
for(;;fmt++)
{ switch(*fmt)
{ case '.': rno++;continue;
case ';':case 0: goto swicall;
case '0':case '1':case '2':case '3':case '4':
case '5':case '6':case '7':case '8':case '9':
r.r[rno++]=*fmt-'0';continue;
case '-':r.r[rno++]=-1;continue;
}
if(j>=n) return swi_error("Too few arguments");
v=PyTuple_GetItem(args,j++);
switch(*fmt)
{ case 'i':if(!PyArg_Parse(v,"i",&r.r[rno])) return NULL;
break;
case 's':if(!PyArg_Parse(v,"s",(char**)(&r.r[rno]))) return NULL;
break;
case 'b':if(!PyArg_Parse(v,"O",(PyObject**)&ao)) return NULL;
if(!PyBlock_Check(v)) return swi_error("Not a block");
r.r[rno]=(int)(ao->block);
break;
case 'e':if(!PyArg_Parse(v,"O",(PyObject**)&ao)) return NULL;
if(!PyBlock_Check(v)) return swi_error("Not a block");
r.r[rno]=(int)(ao->block)+ao->length;
break;
default:return swi_error("Odd format character");
}
rno++;
}
swicall:e=(os_error*)_kernel_swi_c(swino,&r,&r,&carry);
if(e) return swi_oserror();
if(*fmt==0) { Py_INCREF(Py_None);return Py_None;}
n=0;
for(outfmt=++fmt;*outfmt;outfmt++) switch(*outfmt)
{ case 'i':case 's':case '*':n++;break;
case '.':break;
default:return swi_error("Odd format character");
}
if(n==0) { Py_INCREF(Py_None);return Py_None;}
if(n!=1)
{ result=PyTuple_New(n);
if(!result) return NULL;
}
rno=0;j=0;
for(;*fmt;fmt++)
{ switch(*fmt)
{ case 'i':v=PyInt_FromLong((long)r.r[rno++]); break;
case 's':v=PyString_FromString((char*)(r.r[rno++])); break;
case '.':rno++; continue;
case '*':v=PyInt_FromLong((long)carry); break;
}
if(!v) goto fail;
if(n==1) return v;
PyTuple_SetItem(result,j,v);
j++;
}
return result;
fail:Py_DECREF(result);return 0;
}
static PyObject *swi_string(PyObject *self, PyObject *arg)
{ char *s;
int l=-1;
if(!PyArg_ParseTuple(arg,"i|i",(unsigned int *)&s, &l)) return NULL;
if (l==-1)
l = strlen(s);
return PyString_FromStringAndSize((char*)s, l);
}
static char swi_string__doc__[] =
"string(address[, length]) -> string\n\
Read a null terminated string from the given address.";
static PyObject *swi_integer(PyObject *self, PyObject *arg)
{ int *i;
if(!PyArg_ParseTuple(arg,"i",(unsigned int *)&i))
return NULL;
return PyInt_FromLong(*i);
}
static char swi_integer__doc__[] =
"integer(address) -> string\n\
Read an integer from the given address.";
static PyObject *swi_integers(PyObject *self, PyObject *arg)
{ int *i;
int c=-1;
PyObject *result, *result1;
if(!PyArg_ParseTuple(arg,"i|i",(unsigned int *)&i, &c)) return NULL;
result=PyList_New(0);
if (result) {
while ( c>0 || (c==-1 && *i) ) {
result1 = PyInt_FromLong((long)*i);
if (!result1) {
Py_DECREF(result);
return NULL;
}
if (PyList_Append(result, result1)!=0) {
Py_DECREF(result);
Py_DECREF(result1);
return NULL;
};
i++;
if (c!=-1)
c--;
}
}
return result;
}
static char swi_integers__doc__[] =
"integers(address[, count]) -> string\n\
Either read a null terminated list of integers or\n\
a list of given length from the given address.";
static PyObject *swi_tuples(PyObject *self, PyObject *arg)
{
unsigned char *i; /* points to current */
int c=-1, l=4, j, zero; /* count, length, index */
PyObject *result, *result1, *result11;
if(!PyArg_ParseTuple(arg,"i|ii",(unsigned int *)&i, &l, &c)) return NULL;
result=PyList_New(0);
if (result) {
while (c) {
result1 = PyTuple_New(l);
if (!result1) {
Py_DECREF(result);
return NULL;
}
zero = (c==-1); /* check for zeros? */
for(j=0;j<l;j++) {
if (zero && *i)
zero = 0; /* non-zero found */
result11 = PyInt_FromLong((long)(*i));
if (!result11) {
Py_DECREF(result);
return NULL;
}
PyTuple_SetItem(result1, j, result11);
i++;
}
if (c==-1 && zero) {
Py_DECREF(result1);
c = 0;
break;
}
if (PyList_Append(result, result1)!=0) {
Py_DECREF(result1);
Py_DECREF(result);
return NULL;
}
if (c!=-1)
c--;
}
}
return result;
}
static char swi_tuples__doc__[] =
"tuples(address[, length=4[, count]]) -> string\n\
Either read a null terminated list of byte tuples or\n\
a list of given length from the given address.";
static PyObject *swi_tuple(PyObject *self, PyObject *arg)
{
unsigned char *i; /* points to current */
int c=1, j;
PyObject *result, *result1;
if(!PyArg_ParseTuple(arg,"i|i",(unsigned int *)&i, &c)) return NULL;
result = PyTuple_New(c);
if (!result)
return NULL;
for(j=0;j<c;j++) {
result1 = PyInt_FromLong((long)(i[j]));
if (!result1) {
Py_DECREF(result);
return NULL;
}
PyTuple_SetItem(result, j, result1);
}
return result;
}
static char swi_tuple__doc__[] =
"tuple(address[, count=1]]) -> tuple\n\
Read count bytes from given address.";
static PyMethodDef SwiMethods[]=
{ { "swi", swi_swi, METH_VARARGS},
{ "block", PyBlock_New, METH_VARARGS},
{ "register", PyRegister, METH_VARARGS},
{ "string", swi_string, METH_VARARGS, swi_string__doc__},
{ "integer", swi_integer, METH_VARARGS, swi_integer__doc__},
{ "integers", swi_integers, METH_VARARGS, swi_integers__doc__},
{ "tuples", swi_tuples, METH_VARARGS, swi_tuples__doc__},
{ "tuple", swi_tuple, METH_VARARGS, swi_tuple__doc__},
{ NULL,NULL,0,NULL} /* Sentinel */
};
void initswi()
{ PyObject *m, *d;
m = Py_InitModule("swi", SwiMethods);
d = PyModule_GetDict(m);
SwiError=PyErr_NewException("swi.error", NULL, NULL);
PyDict_SetItemString(d,"error",SwiError);
ArgError=PyErr_NewException("swi.ArgError", NULL, NULL);
PyDict_SetItemString(d,"ArgError",ArgError);
}
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