cpython/Mac/Modules/cf/pycfbridge.c

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/*
** Convert objects from Python to CoreFoundation and vice-versa.
*/
#include <CoreServices/CoreServices.h>
#include "Python.h"
#include "pymactoolbox.h"
#include "pycfbridge.h"
/* ---------------------------------------- */
/* CoreFoundation objects to Python objects */
/* ---------------------------------------- */
PyObject *
PyCF_CF2Python(CFTypeRef src) {
CFTypeID typeid;
if( src == NULL ) {
Py_INCREF(Py_None);
return Py_None;
}
typeid = CFGetTypeID(src);
if (typeid == CFArrayGetTypeID())
return PyCF_CF2Python_sequence((CFArrayRef)src);
if (typeid == CFDictionaryGetTypeID())
return PyCF_CF2Python_mapping((CFDictionaryRef)src);
return PyCF_CF2Python_simple(src);
}
PyObject *
PyCF_CF2Python_sequence(CFArrayRef src) {
int size = CFArrayGetCount(src);
PyObject *rv;
CFTypeRef item_cf;
PyObject *item_py = NULL;
int i;
if ( (rv=PyList_New(size)) == NULL )
return NULL;
for(i=0; i<size; i++) {
item_cf = CFArrayGetValueAtIndex(src, i);
if (item_cf == NULL ) goto err;
item_py = PyCF_CF2Python(item_cf);
if (item_py == NULL ) goto err;
if (PyList_SetItem(rv, i, item_py) < 0) goto err;
item_py = NULL;
}
return rv;
err:
Py_XDECREF(item_py);
Py_DECREF(rv);
return NULL;
}
PyObject *
PyCF_CF2Python_mapping(CFTypeRef src) {
int size = CFDictionaryGetCount(src);
PyObject *rv = NULL;
CFTypeRef *allkeys = NULL, *allvalues = NULL;
CFTypeRef key_cf, value_cf;
PyObject *key_py = NULL, *value_py = NULL;
int i;
allkeys = malloc(size*sizeof(CFTypeRef *));
if (allkeys == NULL) {
PyErr_NoMemory();
goto err;
}
allvalues = malloc(size*sizeof(CFTypeRef *));
if (allvalues == NULL) {
PyErr_NoMemory();
goto err;
}
if ( (rv=PyDict_New()) == NULL ) goto err;
CFDictionaryGetKeysAndValues(src, allkeys, allvalues);
for(i=0; i<size; i++) {
key_cf = allkeys[i];
value_cf = allvalues[i];
key_py = PyCF_CF2Python(key_cf);
if (key_py == NULL ) goto err;
value_py = PyCF_CF2Python(value_cf);
if (value_py == NULL ) goto err;
if (PyDict_SetItem(rv, key_py, value_py) < 0) goto err;
key_py = NULL;
value_py = NULL;
}
return rv;
err:
Py_XDECREF(key_py);
Py_XDECREF(value_py);
Py_XDECREF(rv);
free(allkeys);
free(allvalues);
return NULL;
}
PyObject *
PyCF_CF2Python_simple(CFTypeRef src) {
CFTypeID typeid;
typeid = CFGetTypeID(src);
if (typeid == CFStringGetTypeID())
return PyCF_CF2Python_string((CFStringRef)src);
if (typeid == CFBooleanGetTypeID())
return PyBool_FromLong((long)CFBooleanGetValue(src));
if (typeid == CFNumberGetTypeID()) {
if (CFNumberIsFloatType(src)) {
double d;
CFNumberGetValue(src, kCFNumberDoubleType, &d);
return PyFloat_FromDouble(d);
} else {
long l;
if (!CFNumberGetValue(src, kCFNumberLongType, &l))
/* XXXX Out of range! */;
return PyInt_FromLong(l);
}
}
/* XXXX Should return as CFTypeRef, really... */
PyMac_Error(resNotFound);
return NULL;
}
/* Unsure - Return unicode or 8 bit strings? */
PyObject *
PyCF_CF2Python_string(CFStringRef src) {
int size = CFStringGetLength(src)+1;
Py_UNICODE *data = malloc(size*sizeof(Py_UNICODE));
CFRange range;
PyObject *rv;
range.location = 0;
range.length = size;
if( data == NULL ) return PyErr_NoMemory();
CFStringGetCharacters(src, range, data);
rv = (PyObject *)PyUnicode_FromUnicode(data, size-1);
free(data);
return rv;
}
/* ---------------------------------------- */
/* Python objects to CoreFoundation objects */
/* ---------------------------------------- */
int
PyCF_Python2CF(PyObject *src, CFTypeRef *dst) {
if (PyString_Check(src) || PyUnicode_Check(src))
return PyCF_Python2CF_simple(src, dst);
if (PySequence_Check(src))
return PyCF_Python2CF_sequence(src, (CFArrayRef *)dst);
if (PyMapping_Check(src))
return PyCF_Python2CF_mapping(src, (CFDictionaryRef *)dst);
return PyCF_Python2CF_simple(src, dst);
}
int
PyCF_Python2CF_sequence(PyObject *src, CFArrayRef *dst) {
CFMutableArrayRef rv = NULL;
CFTypeRef item_cf = NULL;
PyObject *item_py = NULL;
int size, i;
if( !PySequence_Check(src) ) {
PyErr_Format(PyExc_TypeError,
"Cannot convert %.500s objects to CFArray",
src->ob_type->tp_name);
return 0;
}
size = PySequence_Size(src);
rv = CFArrayCreateMutable((CFAllocatorRef)NULL, size, &kCFTypeArrayCallBacks);
if (rv == NULL) {
PyMac_Error(resNotFound);
goto err;
}
for( i=0; i<size; i++) {
item_py = PySequence_GetItem(src, i);
if (item_py == NULL) goto err;
if ( !PyCF_Python2CF(item_py, &item_cf)) goto err;
Py_DECREF(item_py);
CFArraySetValueAtIndex(rv, i, item_cf);
CFRelease(item_cf);
item_cf = NULL;
}
*dst = rv;
return 1;
err:
Py_XDECREF(item_py);
if (rv) CFRelease(rv);
if (item_cf) CFRelease(item_cf);
return 0;
}
int
PyCF_Python2CF_mapping(PyObject *src, CFDictionaryRef *dst) {
CFMutableDictionaryRef rv = NULL;
PyObject *aslist = NULL;
CFTypeRef key_cf = NULL, value_cf = NULL;
PyObject *item_py = NULL, *key_py = NULL, *value_py = NULL;
int size, i;
if( !PyMapping_Check(src) ) {
PyErr_Format(PyExc_TypeError,
"Cannot convert %.500s objects to CFDictionary",
src->ob_type->tp_name);
return 0;
}
size = PyMapping_Size(src);
rv = CFDictionaryCreateMutable((CFAllocatorRef)NULL, size,
&kCFTypeDictionaryKeyCallBacks,
&kCFTypeDictionaryValueCallBacks);
if (rv == NULL) {
PyMac_Error(resNotFound);
goto err;
}
if ( (aslist = PyMapping_Items(src)) == NULL ) goto err;
for( i=0; i<size; i++) {
item_py = PySequence_GetItem(aslist, i);
if (item_py == NULL) goto err;
if (!PyArg_ParseTuple(item_py, "OO", &key_py, &value_py)) goto err;
if ( !PyCF_Python2CF(key_py, &key_cf) ) goto err;
if ( !PyCF_Python2CF(value_py, &value_cf) ) goto err;
CFDictionaryAddValue(rv, key_cf, value_cf);
CFRelease(key_cf);
key_cf = NULL;
CFRelease(value_cf);
value_cf = NULL;
}
*dst = rv;
return 1;
err:
Py_XDECREF(item_py);
Py_XDECREF(aslist);
if (rv) CFRelease(rv);
if (key_cf) CFRelease(key_cf);
if (value_cf) CFRelease(value_cf);
return 0;
}
int
PyCF_Python2CF_simple(PyObject *src, CFTypeRef *dst) {
#if 0
if (PyObject_HasAttrString(src, "CFType")) {
*dst = PyObject_CallMethod(src, "CFType", "");
return (*dst != NULL);
}
#endif
if (PyString_Check(src) || PyUnicode_Check(src))
return PyCF_Python2CF_string(src, (CFStringRef *)dst);
if (PyBool_Check(src)) {
if (src == Py_True)
*dst = kCFBooleanTrue;
else
*dst = kCFBooleanFalse;
return 1;
}
if (PyInt_Check(src)) {
long v = PyInt_AsLong(src);
*dst = CFNumberCreate(NULL, kCFNumberLongType, &v);
return 1;
}
if (PyFloat_Check(src)) {
double d = PyFloat_AsDouble(src);
*dst = CFNumberCreate(NULL, kCFNumberDoubleType, &d);
return 1;
}
PyErr_Format(PyExc_TypeError,
"Cannot convert %.500s objects to CFType",
src->ob_type->tp_name);
return 0;
}
int
PyCF_Python2CF_string(PyObject *src, CFStringRef *dst) {
char *chars;
CFIndex size;
UniChar *unichars;
if (PyString_Check(src)) {
if (!PyArg_Parse(src, "es", "ascii", &chars))
return 0; /* This error is more descriptive than the general one below */
*dst = CFStringCreateWithCString((CFAllocatorRef)NULL, chars, kCFStringEncodingASCII);
PyMem_Free(chars);
return 1;
}
if (PyUnicode_Check(src)) {
/* We use the CF types here, if Python was configured differently that will give an error */
size = PyUnicode_GetSize(src);
if ((unichars = PyUnicode_AsUnicode(src)) == NULL ) goto err;
*dst = CFStringCreateWithCharacters((CFAllocatorRef)NULL, unichars, size);
return 1;
}
err:
PyErr_Format(PyExc_TypeError,
"Cannot convert %.500s objects to CFString",
src->ob_type->tp_name);
return 0;
}