+and generate_python_c () =
+ generate_header CStyle LGPLv2plus;
+
+ pr "\
+#define PY_SSIZE_T_CLEAN 1
+#include <Python.h>
+
+#if PY_VERSION_HEX < 0x02050000
+typedef int Py_ssize_t;
+#define PY_SSIZE_T_MAX INT_MAX
+#define PY_SSIZE_T_MIN INT_MIN
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+
+#include \"hivex.h\"
+
+#ifndef HAVE_PYCAPSULE_NEW
+typedef struct {
+ PyObject_HEAD
+ hive_h *h;
+} Pyhivex_Object;
+#endif
+
+static hive_h *
+get_handle (PyObject *obj)
+{
+ assert (obj);
+ assert (obj != Py_None);
+#ifndef HAVE_PYCAPSULE_NEW
+ return ((Pyhivex_Object *) obj)->h;
+#else
+ return (hive_h *) PyCapsule_GetPointer(obj, \"hive_h\");
+#endif
+}
+
+static PyObject *
+put_handle (hive_h *h)
+{
+ assert (h);
+#ifndef HAVE_PYCAPSULE_NEW
+ return
+ PyCObject_FromVoidPtrAndDesc ((void *) h, (char *) \"hive_h\", NULL);
+#else
+ return PyCapsule_New ((void *) h, \"hive_h\", NULL);
+#endif
+}
+
+/* This returns pointers into the Python objects, which should
+ * not be freed.
+ */
+static int
+get_value (PyObject *v, hive_set_value *ret)
+{
+ PyObject *obj;
+
+ obj = PyDict_GetItemString (v, \"key\");
+ if (!obj) {
+ PyErr_SetString (PyExc_RuntimeError, \"no 'key' element in dictionary\");
+ return -1;
+ }
+ if (!PyString_Check (obj)) {
+ PyErr_SetString (PyExc_RuntimeError, \"'key' element is not a string\");
+ return -1;
+ }
+ ret->key = PyString_AsString (obj);
+
+ obj = PyDict_GetItemString (v, \"t\");
+ if (!obj) {
+ PyErr_SetString (PyExc_RuntimeError, \"no 't' element in dictionary\");
+ return -1;
+ }
+ if (!PyInt_Check (obj)) {
+ PyErr_SetString (PyExc_RuntimeError, \"'t' element is not an integer\");
+ return -1;
+ }
+ ret->t = PyInt_AsLong (obj);
+
+ obj = PyDict_GetItemString (v, \"value\");
+ if (!obj) {
+ PyErr_SetString (PyExc_RuntimeError, \"no 'value' element in dictionary\");
+ return -1;
+ }
+ if (!PyString_Check (obj)) {
+ PyErr_SetString (PyExc_RuntimeError, \"'value' element is not a string\");
+ return -1;
+ }
+ ret->value = PyString_AsString (obj);
+ ret->len = PyString_Size (obj);
+
+ return 0;
+}
+
+typedef struct py_set_values {
+ size_t nr_values;
+ hive_set_value *values;
+} py_set_values;
+
+static int
+get_values (PyObject *v, py_set_values *ret)
+{
+ Py_ssize_t slen;
+ size_t len, i;
+
+ if (!PyList_Check (v)) {
+ PyErr_SetString (PyExc_RuntimeError, \"expecting a list parameter\");
+ return -1;
+ }
+
+ slen = PyList_Size (v);
+ if (slen < 0) {
+ PyErr_SetString (PyExc_RuntimeError, \"get_string_list: PyList_Size failure\");
+ return -1;
+ }
+ len = (size_t) slen;
+ ret->nr_values = len;
+ ret->values = malloc (len * sizeof (hive_set_value));
+ if (!ret->values) {
+ PyErr_SetString (PyExc_RuntimeError, strerror (errno));
+ return -1;
+ }
+
+ for (i = 0; i < len; ++i) {
+ if (get_value (PyList_GetItem (v, i), &(ret->values[i])) == -1) {
+ free (ret->values);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+static PyObject *
+put_string_list (char * const * const argv)
+{
+ PyObject *list;
+ size_t argc, i;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ ;
+
+ list = PyList_New (argc);
+ for (i = 0; i < argc; ++i)
+ PyList_SetItem (list, i, PyString_FromString (argv[i]));
+
+ return list;
+}
+
+static void
+free_strings (char **argv)
+{
+ size_t argc;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ free (argv[argc]);
+ free (argv);
+}
+
+/* Since hive_node_t is the same as hive_value_t this also works for values. */
+static PyObject *
+put_node_list (hive_node_h *nodes)
+{
+ PyObject *list;
+ size_t argc, i;
+
+ for (argc = 0; nodes[argc] != 0; ++argc)
+ ;
+
+ list = PyList_New (argc);
+ for (i = 0; i < argc; ++i)
+ PyList_SetItem (list, i, PyLong_FromLongLong ((long) nodes[i]));
+
+ return list;
+}
+
+static PyObject *
+put_len_type (size_t len, hive_type t)
+{
+ PyObject *r = PyTuple_New (2);
+ PyTuple_SetItem (r, 0, PyInt_FromLong ((long) t));
+ PyTuple_SetItem (r, 1, PyLong_FromLongLong ((long) len));
+ return r;
+}
+
+static PyObject *
+put_val_type (char *val, size_t len, hive_type t)
+{
+ PyObject *r = PyTuple_New (2);
+ PyTuple_SetItem (r, 0, PyInt_FromLong ((long) t));
+ PyTuple_SetItem (r, 1, PyString_FromStringAndSize (val, len));
+ return r;
+}
+
+";
+
+ (* Generate functions. *)
+ List.iter (
+ fun (name, style, _, longdesc) ->
+ pr "static PyObject *\n";
+ pr "py_hivex_%s (PyObject *self, PyObject *args)\n" name;
+ pr "{\n";
+ pr " PyObject *py_r;\n";
+
+ let error_code =
+ match fst style with
+ | RErr -> pr " int r;\n"; "-1"
+ | RErrDispose -> pr " int r;\n"; "-1"
+ | RHive -> pr " hive_h *r;\n"; "NULL"
+ | RNode -> pr " hive_node_h r;\n"; "0"
+ | RNodeNotFound ->
+ pr " errno = 0;\n";
+ pr " hive_node_h r;\n";
+ "0 && errno != 0"
+ | RNodeList -> pr " hive_node_h *r;\n"; "NULL"
+ | RValue -> pr " hive_value_h r;\n"; "0"
+ | RValueList -> pr " hive_value_h *r;\n"; "NULL"
+ | RString -> pr " char *r;\n"; "NULL"
+ | RStringList -> pr " char **r;\n"; "NULL"
+ | RLenType ->
+ pr " int r;\n";
+ pr " size_t len;\n";
+ pr " hive_type t;\n";
+ "-1"
+ | RLenTypeVal ->
+ pr " char *r;\n";
+ pr " size_t len;\n";
+ pr " hive_type t;\n";
+ "NULL"
+ | RInt32 ->
+ pr " errno = 0;\n";
+ pr " int32_t r;\n";
+ "-1 && errno != 0"
+ | RInt64 ->
+ pr " errno = 0;\n";
+ pr " int64_t r;\n";
+ "-1 && errno != 0" in
+
+ (* Call and arguments. *)
+ let c_params =
+ List.map (function
+ | AUnusedFlags -> "0"
+ | ASetValues -> "values.nr_values, values.values"
+ | ASetValue -> "&val"
+ | arg -> name_of_argt arg) (snd style) in
+ let c_params =
+ match fst style with
+ | RLenType | RLenTypeVal -> c_params @ ["&t"; "&len"]
+ | _ -> c_params in
+
+ List.iter (
+ function
+ | AHive ->
+ pr " hive_h *h;\n";
+ pr " PyObject *py_h;\n"
+ | ANode n
+ | AValue n ->
+ pr " long %s;\n" n
+ | AString n
+ | AStringNullable n ->
+ pr " char *%s;\n" n
+ | AOpenFlags ->
+ pr " int flags;\n"
+ | AUnusedFlags -> ()
+ | ASetValues ->
+ pr " py_set_values values;\n";
+ pr " PyObject *py_values;\n"
+ | ASetValue ->
+ pr " hive_set_value val;\n";
+ pr " PyObject *py_val;\n"
+ ) (snd style);
+
+ pr "\n";
+
+ (* Convert the required parameters. *)
+ pr " if (!PyArg_ParseTuple (args, (char *) \"";
+ List.iter (
+ function
+ | AHive ->
+ pr "O"
+ | ANode n
+ | AValue n ->
+ pr "l"
+ | AString n ->
+ pr "s"
+ | AStringNullable n ->
+ pr "z"
+ | AOpenFlags ->
+ pr "i"
+ | AUnusedFlags -> ()
+ | ASetValues
+ | ASetValue ->
+ pr "O"
+ ) (snd style);
+
+ pr ":hivex_%s\"" name;
+
+ List.iter (
+ function
+ | AHive ->
+ pr ", &py_h"
+ | ANode n
+ | AValue n ->
+ pr ", &%s" n
+ | AString n
+ | AStringNullable n ->
+ pr ", &%s" n
+ | AOpenFlags ->
+ pr ", &flags"
+ | AUnusedFlags -> ()
+ | ASetValues ->
+ pr ", &py_values"
+ | ASetValue ->
+ pr ", &py_val"
+ ) (snd style);
+
+ pr "))\n";
+ pr " return NULL;\n";
+
+ (* Convert some Python argument types to C. *)
+ List.iter (
+ function
+ | AHive ->
+ pr " h = get_handle (py_h);\n"
+ | ANode _
+ | AValue _
+ | AString _
+ | AStringNullable _
+ | AOpenFlags
+ | AUnusedFlags -> ()
+ | ASetValues ->
+ pr " if (get_values (py_values, &values) == -1)\n";
+ pr " return NULL;\n"
+ | ASetValue ->
+ pr " if (get_value (py_val, &val) == -1)\n";
+ pr " return NULL;\n"
+ ) (snd style);
+
+ (* Call the C function. *)
+ pr " r = hivex_%s (%s);\n" name (String.concat ", " c_params);
+
+ (* Free up arguments. *)
+ List.iter (
+ function
+ | AHive | ANode _ | AValue _
+ | AString _ | AStringNullable _
+ | AOpenFlags | AUnusedFlags -> ()
+ | ASetValues ->
+ pr " free (values.values);\n"
+ | ASetValue -> ()
+ ) (snd style);
+
+ (* Check for errors from C library. *)
+ pr " if (r == %s) {\n" error_code;
+ pr " PyErr_SetString (PyExc_RuntimeError,\n";
+ pr " strerror (errno));\n";
+ pr " return NULL;\n";
+ pr " }\n";
+ pr "\n";
+
+ (* Convert return value to Python. *)
+ (match fst style with
+ | RErr
+ | RErrDispose ->
+ pr " Py_INCREF (Py_None);\n";
+ pr " py_r = Py_None;\n"
+ | RHive ->
+ pr " py_r = put_handle (r);\n"
+ | RNode ->
+ pr " py_r = PyLong_FromLongLong (r);\n"
+ | RNodeNotFound ->
+ pr " if (r)\n";
+ pr " py_r = PyLong_FromLongLong (r);\n";
+ pr " else {\n";
+ pr " Py_INCREF (Py_None);\n";
+ pr " py_r = Py_None;\n";
+ pr " }\n";
+ | RNodeList
+ | RValueList ->
+ pr " py_r = put_node_list (r);\n";
+ pr " free (r);\n"
+ | RValue ->
+ pr " py_r = PyLong_FromLongLong (r);\n"
+ | RString ->
+ pr " py_r = PyString_FromString (r);\n";
+ pr " free (r);"
+ | RStringList ->
+ pr " py_r = put_string_list (r);\n";
+ pr " free_strings (r);\n"
+ | RLenType ->
+ pr " py_r = put_len_type (len, t);\n"
+ | RLenTypeVal ->
+ pr " py_r = put_val_type (r, len, t);\n";
+ pr " free (r);\n"
+ | RInt32 ->
+ pr " py_r = PyInt_FromLong ((long) r);\n"
+ | RInt64 ->
+ pr " py_r = PyLong_FromLongLong (r);\n"
+ );
+ pr " return py_r;\n";
+ pr "}\n";
+ pr "\n"
+ ) functions;
+
+ (* Table of functions. *)
+ pr "static PyMethodDef methods[] = {\n";
+ List.iter (
+ fun (name, _, _, _) ->
+ pr " { (char *) \"%s\", py_hivex_%s, METH_VARARGS, NULL },\n"
+ name name
+ ) functions;
+ pr " { NULL, NULL, 0, NULL }\n";
+ pr "};\n";
+ pr "\n";
+
+ (* Init function. *)
+ pr "\
+void
+initlibhivexmod (void)
+{
+ static int initialized = 0;
+
+ if (initialized) return;
+ Py_InitModule ((char *) \"libhivexmod\", methods);
+ initialized = 1;
+}
+"
+
git.annexia.org / hivex.git / blobdiff