mirror of https://github.com/python/cpython
1930 lines
46 KiB
C
1930 lines
46 KiB
C
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/* New getargs implementation */
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#include "Python.h"
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#include <ctype.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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int PyArg_Parse(PyObject *, const char *, ...);
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int PyArg_ParseTuple(PyObject *, const char *, ...);
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int PyArg_VaParse(PyObject *, const char *, va_list);
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int PyArg_ParseTupleAndKeywords(PyObject *, PyObject *,
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const char *, char **, ...);
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int PyArg_VaParseTupleAndKeywords(PyObject *, PyObject *,
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const char *, char **, va_list);
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#ifdef HAVE_DECLSPEC_DLL
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/* Export functions */
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PyAPI_FUNC(int) _PyArg_Parse_SizeT(PyObject *, char *, ...);
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PyAPI_FUNC(int) _PyArg_ParseTuple_SizeT(PyObject *, char *, ...);
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PyAPI_FUNC(int) _PyArg_ParseTupleAndKeywords_SizeT(PyObject *, PyObject *,
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const char *, char **, ...);
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PyAPI_FUNC(PyObject *) _Py_BuildValue_SizeT(const char *, ...);
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PyAPI_FUNC(int) _PyArg_VaParse_SizeT(PyObject *, char *, va_list);
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PyAPI_FUNC(int) _PyArg_VaParseTupleAndKeywords_SizeT(PyObject *, PyObject *,
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const char *, char **, va_list);
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#endif
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#define FLAG_COMPAT 1
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#define FLAG_SIZE_T 2
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/* Forward */
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static int vgetargs1(PyObject *, const char *, va_list *, int);
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static void seterror(int, const char *, int *, const char *, const char *);
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static char *convertitem(PyObject *, const char **, va_list *, int, int *,
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char *, size_t, PyObject **);
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static char *converttuple(PyObject *, const char **, va_list *, int,
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int *, char *, size_t, int, PyObject **);
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static char *convertsimple(PyObject *, const char **, va_list *, int, char *,
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size_t, PyObject **);
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static Py_ssize_t convertbuffer(PyObject *, void **p, char **);
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static int getbuffer(PyObject *, Py_buffer *, char**);
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static int vgetargskeywords(PyObject *, PyObject *,
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const char *, char **, va_list *, int);
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static char *skipitem(const char **, va_list *, int);
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int
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PyArg_Parse(PyObject *args, const char *format, ...)
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{
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int retval;
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va_list va;
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va_start(va, format);
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retval = vgetargs1(args, format, &va, FLAG_COMPAT);
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va_end(va);
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return retval;
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}
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int
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_PyArg_Parse_SizeT(PyObject *args, char *format, ...)
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{
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int retval;
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va_list va;
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va_start(va, format);
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retval = vgetargs1(args, format, &va, FLAG_COMPAT|FLAG_SIZE_T);
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va_end(va);
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return retval;
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}
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int
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PyArg_ParseTuple(PyObject *args, const char *format, ...)
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{
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int retval;
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va_list va;
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va_start(va, format);
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retval = vgetargs1(args, format, &va, 0);
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va_end(va);
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return retval;
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}
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int
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_PyArg_ParseTuple_SizeT(PyObject *args, char *format, ...)
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{
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int retval;
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va_list va;
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va_start(va, format);
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retval = vgetargs1(args, format, &va, FLAG_SIZE_T);
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va_end(va);
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return retval;
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}
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int
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PyArg_VaParse(PyObject *args, const char *format, va_list va)
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{
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va_list lva;
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#ifdef VA_LIST_IS_ARRAY
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memcpy(lva, va, sizeof(va_list));
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#else
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#ifdef __va_copy
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__va_copy(lva, va);
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#else
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lva = va;
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#endif
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#endif
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return vgetargs1(args, format, &lva, 0);
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}
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int
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_PyArg_VaParse_SizeT(PyObject *args, char *format, va_list va)
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{
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va_list lva;
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#ifdef VA_LIST_IS_ARRAY
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memcpy(lva, va, sizeof(va_list));
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#else
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#ifdef __va_copy
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__va_copy(lva, va);
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#else
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lva = va;
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#endif
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#endif
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return vgetargs1(args, format, &lva, FLAG_SIZE_T);
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}
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/* Handle cleanup of allocated memory in case of exception */
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#define GETARGS_CAPSULE_NAME_CLEANUP_PTR "getargs.cleanup_ptr"
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#define GETARGS_CAPSULE_NAME_CLEANUP_BUFFER "getargs.cleanup_buffer"
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static void
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cleanup_ptr(PyObject *self)
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{
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void *ptr = PyCapsule_GetPointer(self, GETARGS_CAPSULE_NAME_CLEANUP_PTR);
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if (ptr) {
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PyMem_FREE(ptr);
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}
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}
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static void
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cleanup_buffer(PyObject *self)
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{
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Py_buffer *ptr = (Py_buffer *)PyCapsule_GetPointer(self, GETARGS_CAPSULE_NAME_CLEANUP_BUFFER);
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if (ptr) {
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PyBuffer_Release(ptr);
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}
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}
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static int
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addcleanup(void *ptr, PyObject **freelist, PyCapsule_Destructor destr)
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{
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PyObject *cobj;
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const char *name;
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if (!*freelist) {
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*freelist = PyList_New(0);
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if (!*freelist) {
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destr(ptr);
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return -1;
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}
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}
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if (destr == cleanup_ptr) {
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name = GETARGS_CAPSULE_NAME_CLEANUP_PTR;
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} else if (destr == cleanup_buffer) {
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name = GETARGS_CAPSULE_NAME_CLEANUP_BUFFER;
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} else {
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return -1;
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}
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cobj = PyCapsule_New(ptr, name, destr);
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if (!cobj) {
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destr(ptr);
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return -1;
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}
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if (PyList_Append(*freelist, cobj)) {
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Py_DECREF(cobj);
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return -1;
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}
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Py_DECREF(cobj);
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return 0;
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}
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static int
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cleanreturn(int retval, PyObject *freelist)
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{
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if (freelist && retval != 0) {
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/* We were successful, reset the destructors so that they
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don't get called. */
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Py_ssize_t len = PyList_GET_SIZE(freelist), i;
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for (i = 0; i < len; i++)
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PyCapsule_SetDestructor(PyList_GET_ITEM(freelist, i), NULL);
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}
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Py_XDECREF(freelist);
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return retval;
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}
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static int
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vgetargs1(PyObject *args, const char *format, va_list *p_va, int flags)
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{
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char msgbuf[256];
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int levels[32];
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const char *fname = NULL;
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const char *message = NULL;
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int min = -1;
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int max = 0;
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int level = 0;
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int endfmt = 0;
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const char *formatsave = format;
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Py_ssize_t i, len;
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char *msg;
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PyObject *freelist = NULL;
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int compat = flags & FLAG_COMPAT;
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assert(compat || (args != (PyObject*)NULL));
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flags = flags & ~FLAG_COMPAT;
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while (endfmt == 0) {
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int c = *format++;
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switch (c) {
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case '(':
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if (level == 0)
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max++;
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level++;
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if (level >= 30)
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Py_FatalError("too many tuple nesting levels "
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"in argument format string");
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break;
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case ')':
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if (level == 0)
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Py_FatalError("excess ')' in getargs format");
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else
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level--;
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break;
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case '\0':
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endfmt = 1;
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break;
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case ':':
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fname = format;
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endfmt = 1;
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break;
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case ';':
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message = format;
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endfmt = 1;
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break;
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default:
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if (level == 0) {
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if (c == 'O')
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max++;
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else if (isalpha(Py_CHARMASK(c))) {
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if (c != 'e') /* skip encoded */
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max++;
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} else if (c == '|')
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min = max;
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}
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break;
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}
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}
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if (level != 0)
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Py_FatalError(/* '(' */ "missing ')' in getargs format");
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if (min < 0)
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min = max;
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format = formatsave;
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if (compat) {
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if (max == 0) {
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if (args == NULL)
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return 1;
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PyOS_snprintf(msgbuf, sizeof(msgbuf),
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"%.200s%s takes no arguments",
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fname==NULL ? "function" : fname,
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fname==NULL ? "" : "()");
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PyErr_SetString(PyExc_TypeError, msgbuf);
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return 0;
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}
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else if (min == 1 && max == 1) {
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if (args == NULL) {
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PyOS_snprintf(msgbuf, sizeof(msgbuf),
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"%.200s%s takes at least one argument",
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fname==NULL ? "function" : fname,
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fname==NULL ? "" : "()");
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PyErr_SetString(PyExc_TypeError, msgbuf);
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return 0;
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}
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msg = convertitem(args, &format, p_va, flags, levels,
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msgbuf, sizeof(msgbuf), &freelist);
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if (msg == NULL)
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return cleanreturn(1, freelist);
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seterror(levels[0], msg, levels+1, fname, message);
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return cleanreturn(0, freelist);
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}
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else {
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PyErr_SetString(PyExc_SystemError,
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"old style getargs format uses new features");
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return 0;
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}
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}
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if (!PyTuple_Check(args)) {
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PyErr_SetString(PyExc_SystemError,
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"new style getargs format but argument is not a tuple");
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return 0;
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}
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len = PyTuple_GET_SIZE(args);
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if (len < min || max < len) {
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if (message == NULL) {
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PyOS_snprintf(msgbuf, sizeof(msgbuf),
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"%.150s%s takes %s %d argument%s "
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"(%ld given)",
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fname==NULL ? "function" : fname,
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fname==NULL ? "" : "()",
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min==max ? "exactly"
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: len < min ? "at least" : "at most",
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len < min ? min : max,
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(len < min ? min : max) == 1 ? "" : "s",
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Py_SAFE_DOWNCAST(len, Py_ssize_t, long));
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message = msgbuf;
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}
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PyErr_SetString(PyExc_TypeError, message);
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return 0;
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}
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for (i = 0; i < len; i++) {
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if (*format == '|')
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format++;
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msg = convertitem(PyTuple_GET_ITEM(args, i), &format, p_va,
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flags, levels, msgbuf,
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sizeof(msgbuf), &freelist);
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if (msg) {
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seterror(i+1, msg, levels, fname, message);
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return cleanreturn(0, freelist);
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}
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}
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if (*format != '\0' && !isalpha(Py_CHARMASK(*format)) &&
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*format != '(' &&
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*format != '|' && *format != ':' && *format != ';') {
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PyErr_Format(PyExc_SystemError,
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"bad format string: %.200s", formatsave);
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return cleanreturn(0, freelist);
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}
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return cleanreturn(1, freelist);
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}
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static void
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seterror(int iarg, const char *msg, int *levels, const char *fname,
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const char *message)
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{
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char buf[512];
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int i;
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char *p = buf;
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if (PyErr_Occurred())
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return;
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else if (message == NULL) {
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if (fname != NULL) {
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PyOS_snprintf(p, sizeof(buf), "%.200s() ", fname);
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p += strlen(p);
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}
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if (iarg != 0) {
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PyOS_snprintf(p, sizeof(buf) - (p - buf),
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"argument %d", iarg);
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i = 0;
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p += strlen(p);
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while (levels[i] > 0 && i < 32 && (int)(p-buf) < 220) {
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PyOS_snprintf(p, sizeof(buf) - (p - buf),
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", item %d", levels[i]-1);
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p += strlen(p);
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i++;
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}
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}
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else {
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PyOS_snprintf(p, sizeof(buf) - (p - buf), "argument");
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p += strlen(p);
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}
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PyOS_snprintf(p, sizeof(buf) - (p - buf), " %.256s", msg);
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message = buf;
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}
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PyErr_SetString(PyExc_TypeError, message);
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}
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/* Convert a tuple argument.
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On entry, *p_format points to the character _after_ the opening '('.
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On successful exit, *p_format points to the closing ')'.
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If successful:
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*p_format and *p_va are updated,
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*levels and *msgbuf are untouched,
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and NULL is returned.
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If the argument is invalid:
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*p_format is unchanged,
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*p_va is undefined,
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*levels is a 0-terminated list of item numbers,
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*msgbuf contains an error message, whose format is:
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"must be <typename1>, not <typename2>", where:
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<typename1> is the name of the expected type, and
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<typename2> is the name of the actual type,
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and msgbuf is returned.
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*/
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static char *
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converttuple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
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int *levels, char *msgbuf, size_t bufsize, int toplevel,
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PyObject **freelist)
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{
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int level = 0;
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int n = 0;
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const char *format = *p_format;
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int i;
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for (;;) {
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int c = *format++;
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if (c == '(') {
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if (level == 0)
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n++;
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level++;
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}
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else if (c == ')') {
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if (level == 0)
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break;
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level--;
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}
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else if (c == ':' || c == ';' || c == '\0')
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break;
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else if (level == 0 && isalpha(Py_CHARMASK(c)))
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n++;
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}
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if (!PySequence_Check(arg) || PyBytes_Check(arg)) {
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levels[0] = 0;
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PyOS_snprintf(msgbuf, bufsize,
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toplevel ? "expected %d arguments, not %.50s" :
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"must be %d-item sequence, not %.50s",
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n,
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arg == Py_None ? "None" : arg->ob_type->tp_name);
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return msgbuf;
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}
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if ((i = PySequence_Size(arg)) != n) {
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levels[0] = 0;
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PyOS_snprintf(msgbuf, bufsize,
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toplevel ? "expected %d arguments, not %d" :
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"must be sequence of length %d, not %d",
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n, i);
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return msgbuf;
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}
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format = *p_format;
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for (i = 0; i < n; i++) {
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char *msg;
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PyObject *item;
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item = PySequence_GetItem(arg, i);
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if (item == NULL) {
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PyErr_Clear();
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levels[0] = i+1;
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levels[1] = 0;
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strncpy(msgbuf, "is not retrievable", bufsize);
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return msgbuf;
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}
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msg = convertitem(item, &format, p_va, flags, levels+1,
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msgbuf, bufsize, freelist);
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/* PySequence_GetItem calls tp->sq_item, which INCREFs */
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Py_XDECREF(item);
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if (msg != NULL) {
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levels[0] = i+1;
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return msg;
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}
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}
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*p_format = format;
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return NULL;
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}
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/* Convert a single item. */
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static char *
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convertitem(PyObject *arg, const char **p_format, va_list *p_va, int flags,
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int *levels, char *msgbuf, size_t bufsize, PyObject **freelist)
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{
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char *msg;
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const char *format = *p_format;
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if (*format == '(' /* ')' */) {
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format++;
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msg = converttuple(arg, &format, p_va, flags, levels, msgbuf,
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bufsize, 0, freelist);
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if (msg == NULL)
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format++;
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}
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else {
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msg = convertsimple(arg, &format, p_va, flags,
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msgbuf, bufsize, freelist);
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if (msg != NULL)
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levels[0] = 0;
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}
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if (msg == NULL)
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*p_format = format;
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return msg;
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}
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#define UNICODE_DEFAULT_ENCODING(arg) \
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_PyUnicode_AsDefaultEncodedString(arg, NULL)
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/* Format an error message generated by convertsimple(). */
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static char *
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converterr(const char *expected, PyObject *arg, char *msgbuf, size_t bufsize)
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{
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assert(expected != NULL);
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assert(arg != NULL);
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PyOS_snprintf(msgbuf, bufsize,
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"must be %.50s, not %.50s", expected,
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arg == Py_None ? "None" : arg->ob_type->tp_name);
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return msgbuf;
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}
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#define CONV_UNICODE "(unicode conversion error)"
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/* Explicitly check for float arguments when integers are expected.
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Return 1 for error, 0 if ok. */
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static int
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float_argument_error(PyObject *arg)
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{
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if (PyFloat_Check(arg)) {
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|
PyErr_SetString(PyExc_TypeError,
|
|
"integer argument expected, got float" );
|
|
return 1;
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* Convert a non-tuple argument. Return NULL if conversion went OK,
|
|
or a string with a message describing the failure. The message is
|
|
formatted as "must be <desired type>, not <actual type>".
|
|
When failing, an exception may or may not have been raised.
|
|
Don't call if a tuple is expected.
|
|
|
|
When you add new format codes, please don't forget poor skipitem() below.
|
|
*/
|
|
|
|
static char *
|
|
convertsimple(PyObject *arg, const char **p_format, va_list *p_va, int flags,
|
|
char *msgbuf, size_t bufsize, PyObject **freelist)
|
|
{
|
|
/* For # codes */
|
|
#define FETCH_SIZE int *q=NULL;Py_ssize_t *q2=NULL;\
|
|
if (flags & FLAG_SIZE_T) q2=va_arg(*p_va, Py_ssize_t*); \
|
|
else q=va_arg(*p_va, int*);
|
|
#define STORE_SIZE(s) if (flags & FLAG_SIZE_T) *q2=s; else *q=s;
|
|
#define BUFFER_LEN ((flags & FLAG_SIZE_T) ? *q2:*q)
|
|
|
|
const char *format = *p_format;
|
|
char c = *format++;
|
|
PyObject *uarg;
|
|
|
|
switch (c) {
|
|
|
|
case 'b': { /* unsigned byte -- very short int */
|
|
char *p = va_arg(*p_va, char *);
|
|
long ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<b>", arg, msgbuf, bufsize);
|
|
ival = PyLong_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<b>", arg, msgbuf, bufsize);
|
|
else if (ival < 0) {
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"unsigned byte integer is less than minimum");
|
|
return converterr("integer<b>", arg, msgbuf, bufsize);
|
|
}
|
|
else if (ival > UCHAR_MAX) {
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"unsigned byte integer is greater than maximum");
|
|
return converterr("integer<b>", arg, msgbuf, bufsize);
|
|
}
|
|
else
|
|
*p = (unsigned char) ival;
|
|
break;
|
|
}
|
|
|
|
case 'B': {/* byte sized bitfield - both signed and unsigned
|
|
values allowed */
|
|
char *p = va_arg(*p_va, char *);
|
|
long ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<B>", arg, msgbuf, bufsize);
|
|
ival = PyLong_AsUnsignedLongMask(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<B>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = (unsigned char) ival;
|
|
break;
|
|
}
|
|
|
|
case 'h': {/* signed short int */
|
|
short *p = va_arg(*p_va, short *);
|
|
long ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<h>", arg, msgbuf, bufsize);
|
|
ival = PyLong_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<h>", arg, msgbuf, bufsize);
|
|
else if (ival < SHRT_MIN) {
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"signed short integer is less than minimum");
|
|
return converterr("integer<h>", arg, msgbuf, bufsize);
|
|
}
|
|
else if (ival > SHRT_MAX) {
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"signed short integer is greater than maximum");
|
|
return converterr("integer<h>", arg, msgbuf, bufsize);
|
|
}
|
|
else
|
|
*p = (short) ival;
|
|
break;
|
|
}
|
|
|
|
case 'H': { /* short int sized bitfield, both signed and
|
|
unsigned allowed */
|
|
unsigned short *p = va_arg(*p_va, unsigned short *);
|
|
long ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<H>", arg, msgbuf, bufsize);
|
|
ival = PyLong_AsUnsignedLongMask(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<H>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = (unsigned short) ival;
|
|
break;
|
|
}
|
|
|
|
case 'i': {/* signed int */
|
|
int *p = va_arg(*p_va, int *);
|
|
long ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<i>", arg, msgbuf, bufsize);
|
|
ival = PyLong_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<i>", arg, msgbuf, bufsize);
|
|
else if (ival > INT_MAX) {
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"signed integer is greater than maximum");
|
|
return converterr("integer<i>", arg, msgbuf, bufsize);
|
|
}
|
|
else if (ival < INT_MIN) {
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"signed integer is less than minimum");
|
|
return converterr("integer<i>", arg, msgbuf, bufsize);
|
|
}
|
|
else
|
|
*p = ival;
|
|
break;
|
|
}
|
|
|
|
case 'I': { /* int sized bitfield, both signed and
|
|
unsigned allowed */
|
|
unsigned int *p = va_arg(*p_va, unsigned int *);
|
|
unsigned int ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<I>", arg, msgbuf, bufsize);
|
|
ival = (unsigned int)PyLong_AsUnsignedLongMask(arg);
|
|
if (ival == (unsigned int)-1 && PyErr_Occurred())
|
|
return converterr("integer<I>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = ival;
|
|
break;
|
|
}
|
|
|
|
case 'n': /* Py_ssize_t */
|
|
{
|
|
PyObject *iobj;
|
|
Py_ssize_t *p = va_arg(*p_va, Py_ssize_t *);
|
|
Py_ssize_t ival = -1;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<n>", arg, msgbuf, bufsize);
|
|
iobj = PyNumber_Index(arg);
|
|
if (iobj != NULL) {
|
|
ival = PyLong_AsSsize_t(iobj);
|
|
Py_DECREF(iobj);
|
|
}
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<n>", arg, msgbuf, bufsize);
|
|
*p = ival;
|
|
break;
|
|
}
|
|
case 'l': {/* long int */
|
|
long *p = va_arg(*p_va, long *);
|
|
long ival;
|
|
if (float_argument_error(arg))
|
|
return converterr("integer<l>", arg, msgbuf, bufsize);
|
|
ival = PyLong_AsLong(arg);
|
|
if (ival == -1 && PyErr_Occurred())
|
|
return converterr("integer<l>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = ival;
|
|
break;
|
|
}
|
|
|
|
case 'k': { /* long sized bitfield */
|
|
unsigned long *p = va_arg(*p_va, unsigned long *);
|
|
unsigned long ival;
|
|
if (PyLong_Check(arg))
|
|
ival = PyLong_AsUnsignedLongMask(arg);
|
|
else
|
|
return converterr("integer<k>", arg, msgbuf, bufsize);
|
|
*p = ival;
|
|
break;
|
|
}
|
|
|
|
#ifdef HAVE_LONG_LONG
|
|
case 'L': {/* PY_LONG_LONG */
|
|
PY_LONG_LONG *p = va_arg( *p_va, PY_LONG_LONG * );
|
|
PY_LONG_LONG ival = PyLong_AsLongLong( arg );
|
|
if (ival == (PY_LONG_LONG)-1 && PyErr_Occurred() ) {
|
|
return converterr("long<L>", arg, msgbuf, bufsize);
|
|
} else {
|
|
*p = ival;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'K': { /* long long sized bitfield */
|
|
unsigned PY_LONG_LONG *p = va_arg(*p_va, unsigned PY_LONG_LONG *);
|
|
unsigned PY_LONG_LONG ival;
|
|
if (PyLong_Check(arg))
|
|
ival = PyLong_AsUnsignedLongLongMask(arg);
|
|
else
|
|
return converterr("integer<K>", arg, msgbuf, bufsize);
|
|
*p = ival;
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
case 'f': {/* float */
|
|
float *p = va_arg(*p_va, float *);
|
|
double dval = PyFloat_AsDouble(arg);
|
|
if (PyErr_Occurred())
|
|
return converterr("float<f>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = (float) dval;
|
|
break;
|
|
}
|
|
|
|
case 'd': {/* double */
|
|
double *p = va_arg(*p_va, double *);
|
|
double dval = PyFloat_AsDouble(arg);
|
|
if (PyErr_Occurred())
|
|
return converterr("float<d>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = dval;
|
|
break;
|
|
}
|
|
|
|
#ifndef WITHOUT_COMPLEX
|
|
case 'D': {/* complex double */
|
|
Py_complex *p = va_arg(*p_va, Py_complex *);
|
|
Py_complex cval;
|
|
cval = PyComplex_AsCComplex(arg);
|
|
if (PyErr_Occurred())
|
|
return converterr("complex<D>", arg, msgbuf, bufsize);
|
|
else
|
|
*p = cval;
|
|
break;
|
|
}
|
|
#endif /* WITHOUT_COMPLEX */
|
|
|
|
case 'c': {/* char */
|
|
char *p = va_arg(*p_va, char *);
|
|
if (PyBytes_Check(arg) && PyBytes_Size(arg) == 1)
|
|
*p = PyBytes_AS_STRING(arg)[0];
|
|
else
|
|
return converterr("a byte string of length 1", arg, msgbuf, bufsize);
|
|
break;
|
|
}
|
|
|
|
case 'C': {/* unicode char */
|
|
int *p = va_arg(*p_va, int *);
|
|
if (PyUnicode_Check(arg) &&
|
|
PyUnicode_GET_SIZE(arg) == 1)
|
|
*p = PyUnicode_AS_UNICODE(arg)[0];
|
|
else
|
|
return converterr("a unicode character", arg, msgbuf, bufsize);
|
|
break;
|
|
}
|
|
|
|
/* XXX WAAAAH! 's', 'y', 'z', 'u', 'Z', 'e', 'w', 't' codes all
|
|
need to be cleaned up! */
|
|
|
|
case 's': {/* text string */
|
|
if (*format == '*') {
|
|
Py_buffer *p = (Py_buffer *)va_arg(*p_va, Py_buffer *);
|
|
|
|
if (PyUnicode_Check(arg)) {
|
|
uarg = UNICODE_DEFAULT_ENCODING(arg);
|
|
if (uarg == NULL)
|
|
return converterr(CONV_UNICODE,
|
|
arg, msgbuf, bufsize);
|
|
PyBuffer_FillInfo(p, arg,
|
|
PyBytes_AS_STRING(uarg), PyBytes_GET_SIZE(uarg),
|
|
1, 0);
|
|
}
|
|
else { /* any buffer-like object */
|
|
char *buf;
|
|
if (getbuffer(arg, p, &buf) < 0)
|
|
return converterr(buf, arg, msgbuf, bufsize);
|
|
}
|
|
if (addcleanup(p, freelist, cleanup_buffer)) {
|
|
return converterr(
|
|
"(cleanup problem)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
format++;
|
|
} else if (*format == '#') {
|
|
void **p = (void **)va_arg(*p_va, char **);
|
|
FETCH_SIZE;
|
|
|
|
if (PyUnicode_Check(arg)) {
|
|
uarg = UNICODE_DEFAULT_ENCODING(arg);
|
|
if (uarg == NULL)
|
|
return converterr(CONV_UNICODE,
|
|
arg, msgbuf, bufsize);
|
|
*p = PyBytes_AS_STRING(uarg);
|
|
STORE_SIZE(PyBytes_GET_SIZE(uarg));
|
|
}
|
|
else { /* any buffer-like object */
|
|
/* XXX Really? */
|
|
char *buf;
|
|
Py_ssize_t count = convertbuffer(arg, p, &buf);
|
|
if (count < 0)
|
|
return converterr(buf, arg, msgbuf, bufsize);
|
|
STORE_SIZE(count);
|
|
}
|
|
format++;
|
|
} else {
|
|
char **p = va_arg(*p_va, char **);
|
|
|
|
if (PyUnicode_Check(arg)) {
|
|
uarg = UNICODE_DEFAULT_ENCODING(arg);
|
|
if (uarg == NULL)
|
|
return converterr(CONV_UNICODE,
|
|
arg, msgbuf, bufsize);
|
|
*p = PyBytes_AS_STRING(uarg);
|
|
}
|
|
else
|
|
return converterr("string", arg, msgbuf, bufsize);
|
|
if ((Py_ssize_t) strlen(*p) != PyBytes_GET_SIZE(uarg))
|
|
return converterr("string without null bytes",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'y': {/* any buffer-like object, but not PyUnicode */
|
|
void **p = (void **)va_arg(*p_va, char **);
|
|
char *buf;
|
|
Py_ssize_t count;
|
|
if (*format == '*') {
|
|
if (getbuffer(arg, (Py_buffer*)p, &buf) < 0)
|
|
return converterr(buf, arg, msgbuf, bufsize);
|
|
format++;
|
|
if (addcleanup(p, freelist, cleanup_buffer)) {
|
|
return converterr(
|
|
"(cleanup problem)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
break;
|
|
}
|
|
count = convertbuffer(arg, p, &buf);
|
|
if (count < 0)
|
|
return converterr(buf, arg, msgbuf, bufsize);
|
|
else if (*format == '#') {
|
|
FETCH_SIZE;
|
|
STORE_SIZE(count);
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'z': {/* like 's' or 's#', but None is okay, stored as NULL */
|
|
if (*format == '*') {
|
|
Py_buffer *p = (Py_buffer *)va_arg(*p_va, Py_buffer *);
|
|
|
|
if (arg == Py_None)
|
|
PyBuffer_FillInfo(p, NULL, NULL, 0, 1, 0);
|
|
else if (PyUnicode_Check(arg)) {
|
|
uarg = UNICODE_DEFAULT_ENCODING(arg);
|
|
if (uarg == NULL)
|
|
return converterr(CONV_UNICODE,
|
|
arg, msgbuf, bufsize);
|
|
PyBuffer_FillInfo(p, arg,
|
|
PyBytes_AS_STRING(uarg), PyBytes_GET_SIZE(uarg),
|
|
1, 0);
|
|
}
|
|
else { /* any buffer-like object */
|
|
char *buf;
|
|
if (getbuffer(arg, p, &buf) < 0)
|
|
return converterr(buf, arg, msgbuf, bufsize);
|
|
}
|
|
if (addcleanup(p, freelist, cleanup_buffer)) {
|
|
return converterr(
|
|
"(cleanup problem)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
format++;
|
|
} else if (*format == '#') { /* any buffer-like object */
|
|
void **p = (void **)va_arg(*p_va, char **);
|
|
FETCH_SIZE;
|
|
|
|
if (arg == Py_None) {
|
|
*p = 0;
|
|
STORE_SIZE(0);
|
|
}
|
|
else if (PyUnicode_Check(arg)) {
|
|
uarg = UNICODE_DEFAULT_ENCODING(arg);
|
|
if (uarg == NULL)
|
|
return converterr(CONV_UNICODE,
|
|
arg, msgbuf, bufsize);
|
|
*p = PyBytes_AS_STRING(uarg);
|
|
STORE_SIZE(PyBytes_GET_SIZE(uarg));
|
|
}
|
|
else { /* any buffer-like object */
|
|
/* XXX Really? */
|
|
char *buf;
|
|
Py_ssize_t count = convertbuffer(arg, p, &buf);
|
|
if (count < 0)
|
|
return converterr(buf, arg, msgbuf, bufsize);
|
|
STORE_SIZE(count);
|
|
}
|
|
format++;
|
|
} else {
|
|
char **p = va_arg(*p_va, char **);
|
|
uarg = NULL;
|
|
|
|
if (arg == Py_None)
|
|
*p = 0;
|
|
else if (PyBytes_Check(arg)) {
|
|
/* Enable null byte check below */
|
|
uarg = arg;
|
|
*p = PyBytes_AS_STRING(arg);
|
|
}
|
|
else if (PyUnicode_Check(arg)) {
|
|
uarg = UNICODE_DEFAULT_ENCODING(arg);
|
|
if (uarg == NULL)
|
|
return converterr(CONV_UNICODE,
|
|
arg, msgbuf, bufsize);
|
|
*p = PyBytes_AS_STRING(uarg);
|
|
}
|
|
else
|
|
return converterr("string or None",
|
|
arg, msgbuf, bufsize);
|
|
if (*format == '#') {
|
|
FETCH_SIZE;
|
|
assert(0); /* XXX redundant with if-case */
|
|
if (arg == Py_None) {
|
|
STORE_SIZE(0);
|
|
}
|
|
else {
|
|
STORE_SIZE(PyBytes_Size(arg));
|
|
}
|
|
format++;
|
|
}
|
|
else if (*p != NULL && uarg != NULL &&
|
|
(Py_ssize_t) strlen(*p) != PyBytes_GET_SIZE(uarg))
|
|
return converterr(
|
|
"string without null bytes or None",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'Z': {/* unicode, may be NULL (None) */
|
|
if (*format == '#') { /* any buffer-like object */
|
|
Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **);
|
|
FETCH_SIZE;
|
|
|
|
if (arg == Py_None) {
|
|
*p = 0;
|
|
STORE_SIZE(0);
|
|
}
|
|
else if (PyUnicode_Check(arg)) {
|
|
*p = PyUnicode_AS_UNICODE(arg);
|
|
STORE_SIZE(PyUnicode_GET_SIZE(arg));
|
|
}
|
|
format++;
|
|
} else {
|
|
Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **);
|
|
|
|
if (arg == Py_None)
|
|
*p = 0;
|
|
else if (PyUnicode_Check(arg))
|
|
*p = PyUnicode_AS_UNICODE(arg);
|
|
else
|
|
return converterr("string or None",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'e': {/* encoded string */
|
|
char **buffer;
|
|
const char *encoding;
|
|
PyObject *s;
|
|
int recode_strings;
|
|
Py_ssize_t size;
|
|
const char *ptr;
|
|
|
|
/* Get 'e' parameter: the encoding name */
|
|
encoding = (const char *)va_arg(*p_va, const char *);
|
|
if (encoding == NULL)
|
|
encoding = PyUnicode_GetDefaultEncoding();
|
|
|
|
/* Get output buffer parameter:
|
|
's' (recode all objects via Unicode) or
|
|
't' (only recode non-string objects)
|
|
*/
|
|
if (*format == 's')
|
|
recode_strings = 1;
|
|
else if (*format == 't')
|
|
recode_strings = 0;
|
|
else
|
|
return converterr(
|
|
"(unknown parser marker combination)",
|
|
arg, msgbuf, bufsize);
|
|
buffer = (char **)va_arg(*p_va, char **);
|
|
format++;
|
|
if (buffer == NULL)
|
|
return converterr("(buffer is NULL)",
|
|
arg, msgbuf, bufsize);
|
|
|
|
/* Encode object */
|
|
if (!recode_strings &&
|
|
(PyBytes_Check(arg) || PyByteArray_Check(arg))) {
|
|
s = arg;
|
|
Py_INCREF(s);
|
|
if (PyObject_AsCharBuffer(s, &ptr, &size) < 0)
|
|
return converterr("(AsCharBuffer failed)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
else {
|
|
PyObject *u;
|
|
|
|
/* Convert object to Unicode */
|
|
u = PyUnicode_FromObject(arg);
|
|
if (u == NULL)
|
|
return converterr(
|
|
"string or unicode or text buffer",
|
|
arg, msgbuf, bufsize);
|
|
|
|
/* Encode object; use default error handling */
|
|
s = PyUnicode_AsEncodedString(u,
|
|
encoding,
|
|
NULL);
|
|
Py_DECREF(u);
|
|
if (s == NULL)
|
|
return converterr("(encoding failed)",
|
|
arg, msgbuf, bufsize);
|
|
if (!PyBytes_Check(s)) {
|
|
Py_DECREF(s);
|
|
return converterr(
|
|
"(encoder failed to return bytes)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
size = PyBytes_GET_SIZE(s);
|
|
ptr = PyBytes_AS_STRING(s);
|
|
if (ptr == NULL)
|
|
ptr = "";
|
|
}
|
|
|
|
/* Write output; output is guaranteed to be 0-terminated */
|
|
if (*format == '#') {
|
|
/* Using buffer length parameter '#':
|
|
|
|
- if *buffer is NULL, a new buffer of the
|
|
needed size is allocated and the data
|
|
copied into it; *buffer is updated to point
|
|
to the new buffer; the caller is
|
|
responsible for PyMem_Free()ing it after
|
|
usage
|
|
|
|
- if *buffer is not NULL, the data is
|
|
copied to *buffer; *buffer_len has to be
|
|
set to the size of the buffer on input;
|
|
buffer overflow is signalled with an error;
|
|
buffer has to provide enough room for the
|
|
encoded string plus the trailing 0-byte
|
|
|
|
- in both cases, *buffer_len is updated to
|
|
the size of the buffer /excluding/ the
|
|
trailing 0-byte
|
|
|
|
*/
|
|
FETCH_SIZE;
|
|
|
|
format++;
|
|
if (q == NULL && q2 == NULL) {
|
|
Py_DECREF(s);
|
|
return converterr(
|
|
"(buffer_len is NULL)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
if (*buffer == NULL) {
|
|
*buffer = PyMem_NEW(char, size + 1);
|
|
if (*buffer == NULL) {
|
|
Py_DECREF(s);
|
|
return converterr(
|
|
"(memory error)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
if (addcleanup(*buffer, freelist, cleanup_ptr)) {
|
|
Py_DECREF(s);
|
|
return converterr(
|
|
"(cleanup problem)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
} else {
|
|
if (size + 1 > BUFFER_LEN) {
|
|
Py_DECREF(s);
|
|
return converterr(
|
|
"(buffer overflow)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
}
|
|
memcpy(*buffer, ptr, size+1);
|
|
STORE_SIZE(size);
|
|
} else {
|
|
/* Using a 0-terminated buffer:
|
|
|
|
- the encoded string has to be 0-terminated
|
|
for this variant to work; if it is not, an
|
|
error raised
|
|
|
|
- a new buffer of the needed size is
|
|
allocated and the data copied into it;
|
|
*buffer is updated to point to the new
|
|
buffer; the caller is responsible for
|
|
PyMem_Free()ing it after usage
|
|
|
|
*/
|
|
if ((Py_ssize_t)strlen(ptr) != size) {
|
|
Py_DECREF(s);
|
|
return converterr(
|
|
"encoded string without NULL bytes",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
*buffer = PyMem_NEW(char, size + 1);
|
|
if (*buffer == NULL) {
|
|
Py_DECREF(s);
|
|
return converterr("(memory error)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
if (addcleanup(*buffer, freelist, cleanup_ptr)) {
|
|
Py_DECREF(s);
|
|
return converterr("(cleanup problem)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
memcpy(*buffer, ptr, size+1);
|
|
}
|
|
Py_DECREF(s);
|
|
break;
|
|
}
|
|
|
|
case 'u': {/* raw unicode buffer (Py_UNICODE *) */
|
|
Py_UNICODE **p = va_arg(*p_va, Py_UNICODE **);
|
|
if (!PyUnicode_Check(arg))
|
|
return converterr("str", arg, msgbuf, bufsize);
|
|
*p = PyUnicode_AS_UNICODE(arg);
|
|
if (*format == '#') { /* store pointer and size */
|
|
FETCH_SIZE;
|
|
STORE_SIZE(PyUnicode_GET_SIZE(arg));
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'S': { /* PyBytes object */
|
|
PyObject **p = va_arg(*p_va, PyObject **);
|
|
if (PyBytes_Check(arg))
|
|
*p = arg;
|
|
else
|
|
return converterr("bytes", arg, msgbuf, bufsize);
|
|
break;
|
|
}
|
|
|
|
case 'Y': { /* PyByteArray object */
|
|
PyObject **p = va_arg(*p_va, PyObject **);
|
|
if (PyByteArray_Check(arg))
|
|
*p = arg;
|
|
else
|
|
return converterr("buffer", arg, msgbuf, bufsize);
|
|
break;
|
|
}
|
|
|
|
case 'U': { /* PyUnicode object */
|
|
PyObject **p = va_arg(*p_va, PyObject **);
|
|
if (PyUnicode_Check(arg))
|
|
*p = arg;
|
|
else
|
|
return converterr("str", arg, msgbuf, bufsize);
|
|
break;
|
|
}
|
|
|
|
case 'O': { /* object */
|
|
PyTypeObject *type;
|
|
PyObject **p;
|
|
if (*format == '!') {
|
|
type = va_arg(*p_va, PyTypeObject*);
|
|
p = va_arg(*p_va, PyObject **);
|
|
format++;
|
|
if (PyType_IsSubtype(arg->ob_type, type))
|
|
*p = arg;
|
|
else
|
|
return converterr(type->tp_name, arg, msgbuf, bufsize);
|
|
|
|
}
|
|
else if (*format == '?') {
|
|
inquiry pred = va_arg(*p_va, inquiry);
|
|
p = va_arg(*p_va, PyObject **);
|
|
format++;
|
|
if ((*pred)(arg))
|
|
*p = arg;
|
|
else
|
|
return converterr("(unspecified)",
|
|
arg, msgbuf, bufsize);
|
|
|
|
}
|
|
else if (*format == '&') {
|
|
typedef int (*converter)(PyObject *, void *);
|
|
converter convert = va_arg(*p_va, converter);
|
|
void *addr = va_arg(*p_va, void *);
|
|
format++;
|
|
if (! (*convert)(arg, addr))
|
|
return converterr("(unspecified)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
else {
|
|
p = va_arg(*p_va, PyObject **);
|
|
*p = arg;
|
|
}
|
|
break;
|
|
}
|
|
|
|
|
|
case 'w': { /* memory buffer, read-write access */
|
|
void **p = va_arg(*p_va, void **);
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
Py_ssize_t count;
|
|
int temp=-1;
|
|
Py_buffer view;
|
|
|
|
if (pb && pb->bf_releasebuffer && *format != '*')
|
|
/* Buffer must be released, yet caller does not use
|
|
the Py_buffer protocol. */
|
|
return converterr("pinned buffer", arg, msgbuf, bufsize);
|
|
|
|
|
|
if (pb && pb->bf_getbuffer && *format == '*') {
|
|
/* Caller is interested in Py_buffer, and the object
|
|
supports it directly. */
|
|
format++;
|
|
if (PyObject_GetBuffer(arg, (Py_buffer*)p, PyBUF_WRITABLE) < 0) {
|
|
PyErr_Clear();
|
|
return converterr("read-write buffer", arg, msgbuf, bufsize);
|
|
}
|
|
if (addcleanup(p, freelist, cleanup_buffer)) {
|
|
return converterr(
|
|
"(cleanup problem)",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
if (!PyBuffer_IsContiguous((Py_buffer*)p, 'C'))
|
|
return converterr("contiguous buffer", arg, msgbuf, bufsize);
|
|
break;
|
|
}
|
|
|
|
/* Here we have processed w*, only w and w# remain. */
|
|
if (pb == NULL ||
|
|
pb->bf_getbuffer == NULL ||
|
|
((temp = PyObject_GetBuffer(arg, &view,
|
|
PyBUF_SIMPLE)) != 0) ||
|
|
view.readonly == 1) {
|
|
if (temp==0) {
|
|
PyBuffer_Release(&view);
|
|
}
|
|
return converterr("single-segment read-write buffer",
|
|
arg, msgbuf, bufsize);
|
|
}
|
|
|
|
if ((count = view.len) < 0)
|
|
return converterr("(unspecified)", arg, msgbuf, bufsize);
|
|
*p = view.buf;
|
|
if (*format == '#') {
|
|
FETCH_SIZE;
|
|
STORE_SIZE(count);
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/*TEO: This can be eliminated --- here only for backward
|
|
compatibility */
|
|
case 't': { /* 8-bit character buffer, read-only access */
|
|
char **p = va_arg(*p_va, char **);
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
Py_ssize_t count;
|
|
Py_buffer view;
|
|
|
|
if (*format++ != '#')
|
|
return converterr(
|
|
"invalid use of 't' format character",
|
|
arg, msgbuf, bufsize);
|
|
if (pb == NULL || pb->bf_getbuffer == NULL)
|
|
return converterr(
|
|
"bytes or read-only character buffer",
|
|
arg, msgbuf, bufsize);
|
|
|
|
if (PyObject_GetBuffer(arg, &view, PyBUF_SIMPLE) != 0)
|
|
return converterr("string or single-segment read-only buffer",
|
|
arg, msgbuf, bufsize);
|
|
|
|
count = view.len;
|
|
*p = view.buf;
|
|
if (pb->bf_releasebuffer)
|
|
return converterr(
|
|
"string or pinned buffer",
|
|
arg, msgbuf, bufsize);
|
|
|
|
PyBuffer_Release(&view);
|
|
|
|
if (count < 0)
|
|
return converterr("(unspecified)", arg, msgbuf, bufsize);
|
|
{
|
|
FETCH_SIZE;
|
|
STORE_SIZE(count);
|
|
}
|
|
break;
|
|
}
|
|
|
|
default:
|
|
return converterr("impossible<bad format char>", arg, msgbuf, bufsize);
|
|
|
|
}
|
|
|
|
*p_format = format;
|
|
return NULL;
|
|
}
|
|
|
|
static Py_ssize_t
|
|
convertbuffer(PyObject *arg, void **p, char **errmsg)
|
|
{
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
Py_ssize_t count;
|
|
Py_buffer view;
|
|
|
|
*errmsg = NULL;
|
|
*p = NULL;
|
|
if (pb == NULL ||
|
|
pb->bf_getbuffer == NULL ||
|
|
pb->bf_releasebuffer != NULL) {
|
|
*errmsg = "bytes or read-only buffer";
|
|
return -1;
|
|
}
|
|
|
|
if (PyObject_GetBuffer(arg, &view, PyBUF_SIMPLE) != 0) {
|
|
*errmsg = "bytes or single-segment read-only buffer";
|
|
return -1;
|
|
}
|
|
count = view.len;
|
|
*p = view.buf;
|
|
PyBuffer_Release(&view);
|
|
return count;
|
|
}
|
|
|
|
/* XXX for 3.x, getbuffer and convertbuffer can probably
|
|
be merged again. */
|
|
static int
|
|
getbuffer(PyObject *arg, Py_buffer *view, char **errmsg)
|
|
{
|
|
void *buf;
|
|
Py_ssize_t count;
|
|
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
|
|
if (pb == NULL) {
|
|
*errmsg = "bytes or buffer";
|
|
return -1;
|
|
}
|
|
if (pb->bf_getbuffer) {
|
|
if (PyObject_GetBuffer(arg, view, 0) < 0) {
|
|
*errmsg = "convertible to a buffer";
|
|
return -1;
|
|
}
|
|
if (!PyBuffer_IsContiguous(view, 'C')) {
|
|
*errmsg = "contiguous buffer";
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
count = convertbuffer(arg, &buf, errmsg);
|
|
if (count < 0) {
|
|
*errmsg = "convertible to a buffer";
|
|
return count;
|
|
}
|
|
PyBuffer_FillInfo(view, NULL, buf, count, 1, 0);
|
|
return 0;
|
|
}
|
|
|
|
/* Support for keyword arguments donated by
|
|
Geoff Philbrick <philbric@delphi.hks.com> */
|
|
|
|
/* Return false (0) for error, else true. */
|
|
int
|
|
PyArg_ParseTupleAndKeywords(PyObject *args,
|
|
PyObject *keywords,
|
|
const char *format,
|
|
char **kwlist, ...)
|
|
{
|
|
int retval;
|
|
va_list va;
|
|
|
|
if ((args == NULL || !PyTuple_Check(args)) ||
|
|
(keywords != NULL && !PyDict_Check(keywords)) ||
|
|
format == NULL ||
|
|
kwlist == NULL)
|
|
{
|
|
PyErr_BadInternalCall();
|
|
return 0;
|
|
}
|
|
|
|
va_start(va, kwlist);
|
|
retval = vgetargskeywords(args, keywords, format, kwlist, &va, 0);
|
|
va_end(va);
|
|
return retval;
|
|
}
|
|
|
|
int
|
|
_PyArg_ParseTupleAndKeywords_SizeT(PyObject *args,
|
|
PyObject *keywords,
|
|
const char *format,
|
|
char **kwlist, ...)
|
|
{
|
|
int retval;
|
|
va_list va;
|
|
|
|
if ((args == NULL || !PyTuple_Check(args)) ||
|
|
(keywords != NULL && !PyDict_Check(keywords)) ||
|
|
format == NULL ||
|
|
kwlist == NULL)
|
|
{
|
|
PyErr_BadInternalCall();
|
|
return 0;
|
|
}
|
|
|
|
va_start(va, kwlist);
|
|
retval = vgetargskeywords(args, keywords, format,
|
|
kwlist, &va, FLAG_SIZE_T);
|
|
va_end(va);
|
|
return retval;
|
|
}
|
|
|
|
|
|
int
|
|
PyArg_VaParseTupleAndKeywords(PyObject *args,
|
|
PyObject *keywords,
|
|
const char *format,
|
|
char **kwlist, va_list va)
|
|
{
|
|
int retval;
|
|
va_list lva;
|
|
|
|
if ((args == NULL || !PyTuple_Check(args)) ||
|
|
(keywords != NULL && !PyDict_Check(keywords)) ||
|
|
format == NULL ||
|
|
kwlist == NULL)
|
|
{
|
|
PyErr_BadInternalCall();
|
|
return 0;
|
|
}
|
|
|
|
#ifdef VA_LIST_IS_ARRAY
|
|
memcpy(lva, va, sizeof(va_list));
|
|
#else
|
|
#ifdef __va_copy
|
|
__va_copy(lva, va);
|
|
#else
|
|
lva = va;
|
|
#endif
|
|
#endif
|
|
|
|
retval = vgetargskeywords(args, keywords, format, kwlist, &lva, 0);
|
|
return retval;
|
|
}
|
|
|
|
int
|
|
_PyArg_VaParseTupleAndKeywords_SizeT(PyObject *args,
|
|
PyObject *keywords,
|
|
const char *format,
|
|
char **kwlist, va_list va)
|
|
{
|
|
int retval;
|
|
va_list lva;
|
|
|
|
if ((args == NULL || !PyTuple_Check(args)) ||
|
|
(keywords != NULL && !PyDict_Check(keywords)) ||
|
|
format == NULL ||
|
|
kwlist == NULL)
|
|
{
|
|
PyErr_BadInternalCall();
|
|
return 0;
|
|
}
|
|
|
|
#ifdef VA_LIST_IS_ARRAY
|
|
memcpy(lva, va, sizeof(va_list));
|
|
#else
|
|
#ifdef __va_copy
|
|
__va_copy(lva, va);
|
|
#else
|
|
lva = va;
|
|
#endif
|
|
#endif
|
|
|
|
retval = vgetargskeywords(args, keywords, format,
|
|
kwlist, &lva, FLAG_SIZE_T);
|
|
return retval;
|
|
}
|
|
|
|
#define IS_END_OF_FORMAT(c) (c == '\0' || c == ';' || c == ':')
|
|
|
|
static int
|
|
vgetargskeywords(PyObject *args, PyObject *keywords, const char *format,
|
|
char **kwlist, va_list *p_va, int flags)
|
|
{
|
|
char msgbuf[512];
|
|
int levels[32];
|
|
const char *fname, *msg, *custom_msg, *keyword;
|
|
int min = INT_MAX;
|
|
int i, len, nargs, nkeywords;
|
|
PyObject *freelist = NULL, *current_arg;
|
|
|
|
assert(args != NULL && PyTuple_Check(args));
|
|
assert(keywords == NULL || PyDict_Check(keywords));
|
|
assert(format != NULL);
|
|
assert(kwlist != NULL);
|
|
assert(p_va != NULL);
|
|
|
|
/* grab the function name or custom error msg first (mutually exclusive) */
|
|
fname = strchr(format, ':');
|
|
if (fname) {
|
|
fname++;
|
|
custom_msg = NULL;
|
|
}
|
|
else {
|
|
custom_msg = strchr(format,';');
|
|
if (custom_msg)
|
|
custom_msg++;
|
|
}
|
|
|
|
/* scan kwlist and get greatest possible nbr of args */
|
|
for (len=0; kwlist[len]; len++)
|
|
continue;
|
|
|
|
nargs = PyTuple_GET_SIZE(args);
|
|
nkeywords = (keywords == NULL) ? 0 : PyDict_Size(keywords);
|
|
if (nargs + nkeywords > len) {
|
|
PyErr_Format(PyExc_TypeError, "%s%s takes at most %d "
|
|
"argument%s (%d given)",
|
|
(fname == NULL) ? "function" : fname,
|
|
(fname == NULL) ? "" : "()",
|
|
len,
|
|
(len == 1) ? "" : "s",
|
|
nargs + nkeywords);
|
|
return 0;
|
|
}
|
|
|
|
/* convert tuple args and keyword args in same loop, using kwlist to drive process */
|
|
for (i = 0; i < len; i++) {
|
|
keyword = kwlist[i];
|
|
if (*format == '|') {
|
|
min = i;
|
|
format++;
|
|
}
|
|
if (IS_END_OF_FORMAT(*format)) {
|
|
PyErr_Format(PyExc_RuntimeError,
|
|
"More keyword list entries (%d) than "
|
|
"format specifiers (%d)", len, i);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
current_arg = NULL;
|
|
if (nkeywords) {
|
|
current_arg = PyDict_GetItemString(keywords, keyword);
|
|
}
|
|
if (current_arg) {
|
|
--nkeywords;
|
|
if (i < nargs) {
|
|
/* arg present in tuple and in dict */
|
|
PyErr_Format(PyExc_TypeError,
|
|
"Argument given by name ('%s') "
|
|
"and position (%d)",
|
|
keyword, i+1);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
}
|
|
else if (nkeywords && PyErr_Occurred())
|
|
return cleanreturn(0, freelist);
|
|
else if (i < nargs)
|
|
current_arg = PyTuple_GET_ITEM(args, i);
|
|
|
|
if (current_arg) {
|
|
msg = convertitem(current_arg, &format, p_va, flags,
|
|
levels, msgbuf, sizeof(msgbuf), &freelist);
|
|
if (msg) {
|
|
seterror(i+1, msg, levels, fname, custom_msg);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
continue;
|
|
}
|
|
|
|
if (i < min) {
|
|
PyErr_Format(PyExc_TypeError, "Required argument "
|
|
"'%s' (pos %d) not found",
|
|
keyword, i+1);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
/* current code reports success when all required args
|
|
* fulfilled and no keyword args left, with no further
|
|
* validation. XXX Maybe skip this in debug build ?
|
|
*/
|
|
if (!nkeywords)
|
|
return cleanreturn(1, freelist);
|
|
|
|
/* We are into optional args, skip thru to any remaining
|
|
* keyword args */
|
|
msg = skipitem(&format, p_va, flags);
|
|
if (msg) {
|
|
PyErr_Format(PyExc_RuntimeError, "%s: '%s'", msg,
|
|
format);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
}
|
|
|
|
if (!IS_END_OF_FORMAT(*format) && *format != '|') {
|
|
PyErr_Format(PyExc_RuntimeError,
|
|
"more argument specifiers than keyword list entries "
|
|
"(remaining format:'%s')", format);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
|
|
/* make sure there are no extraneous keyword arguments */
|
|
if (nkeywords > 0) {
|
|
PyObject *key, *value;
|
|
Py_ssize_t pos = 0;
|
|
while (PyDict_Next(keywords, &pos, &key, &value)) {
|
|
int match = 0;
|
|
char *ks;
|
|
if (!PyUnicode_Check(key)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"keywords must be strings");
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
ks = _PyUnicode_AsString(key);
|
|
for (i = 0; i < len; i++) {
|
|
if (!strcmp(ks, kwlist[i])) {
|
|
match = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!match) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"'%s' is an invalid keyword "
|
|
"argument for this function",
|
|
ks);
|
|
return cleanreturn(0, freelist);
|
|
}
|
|
}
|
|
}
|
|
|
|
return cleanreturn(1, freelist);
|
|
}
|
|
|
|
|
|
static char *
|
|
skipitem(const char **p_format, va_list *p_va, int flags)
|
|
{
|
|
const char *format = *p_format;
|
|
char c = *format++;
|
|
|
|
switch (c) {
|
|
|
|
/* simple codes
|
|
* The individual types (second arg of va_arg) are irrelevant */
|
|
|
|
case 'b': /* byte -- very short int */
|
|
case 'B': /* byte as bitfield */
|
|
case 'h': /* short int */
|
|
case 'H': /* short int as bitfield */
|
|
case 'i': /* int */
|
|
case 'I': /* int sized bitfield */
|
|
case 'l': /* long int */
|
|
case 'k': /* long int sized bitfield */
|
|
#ifdef HAVE_LONG_LONG
|
|
case 'L': /* PY_LONG_LONG */
|
|
case 'K': /* PY_LONG_LONG sized bitfield */
|
|
#endif
|
|
case 'f': /* float */
|
|
case 'd': /* double */
|
|
#ifndef WITHOUT_COMPLEX
|
|
case 'D': /* complex double */
|
|
#endif
|
|
case 'c': /* char */
|
|
{
|
|
(void) va_arg(*p_va, void *);
|
|
break;
|
|
}
|
|
|
|
case 'n': /* Py_ssize_t */
|
|
{
|
|
(void) va_arg(*p_va, Py_ssize_t *);
|
|
break;
|
|
}
|
|
|
|
/* string codes */
|
|
|
|
case 'e': /* string with encoding */
|
|
{
|
|
(void) va_arg(*p_va, const char *);
|
|
if (!(*format == 's' || *format == 't'))
|
|
/* after 'e', only 's' and 't' is allowed */
|
|
goto err;
|
|
format++;
|
|
/* explicit fallthrough to string cases */
|
|
}
|
|
|
|
case 's': /* string */
|
|
case 'z': /* string or None */
|
|
case 'y': /* bytes */
|
|
case 'u': /* unicode string */
|
|
case 't': /* buffer, read-only */
|
|
case 'w': /* buffer, read-write */
|
|
{
|
|
(void) va_arg(*p_va, char **);
|
|
if (*format == '#') {
|
|
if (flags & FLAG_SIZE_T)
|
|
(void) va_arg(*p_va, Py_ssize_t *);
|
|
else
|
|
(void) va_arg(*p_va, int *);
|
|
format++;
|
|
} else if ((c == 's' || c == 'z' || c == 'y') && *format == '*') {
|
|
format++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
/* object codes */
|
|
|
|
case 'S': /* string object */
|
|
case 'Y': /* string object */
|
|
case 'U': /* unicode string object */
|
|
{
|
|
(void) va_arg(*p_va, PyObject **);
|
|
break;
|
|
}
|
|
|
|
case 'O': /* object */
|
|
{
|
|
if (*format == '!') {
|
|
format++;
|
|
(void) va_arg(*p_va, PyTypeObject*);
|
|
(void) va_arg(*p_va, PyObject **);
|
|
}
|
|
#if 0
|
|
/* I don't know what this is for */
|
|
else if (*format == '?') {
|
|
inquiry pred = va_arg(*p_va, inquiry);
|
|
format++;
|
|
if ((*pred)(arg)) {
|
|
(void) va_arg(*p_va, PyObject **);
|
|
}
|
|
}
|
|
#endif
|
|
else if (*format == '&') {
|
|
typedef int (*converter)(PyObject *, void *);
|
|
(void) va_arg(*p_va, converter);
|
|
(void) va_arg(*p_va, void *);
|
|
format++;
|
|
}
|
|
else {
|
|
(void) va_arg(*p_va, PyObject **);
|
|
}
|
|
break;
|
|
}
|
|
|
|
case '(': /* bypass tuple, not handled at all previously */
|
|
{
|
|
char *msg;
|
|
for (;;) {
|
|
if (*format==')')
|
|
break;
|
|
if (IS_END_OF_FORMAT(*format))
|
|
return "Unmatched left paren in format "
|
|
"string";
|
|
msg = skipitem(&format, p_va, flags);
|
|
if (msg)
|
|
return msg;
|
|
}
|
|
format++;
|
|
break;
|
|
}
|
|
|
|
case ')':
|
|
return "Unmatched right paren in format string";
|
|
|
|
default:
|
|
err:
|
|
return "impossible<bad format char>";
|
|
|
|
}
|
|
|
|
*p_format = format;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
int
|
|
PyArg_UnpackTuple(PyObject *args, const char *name, Py_ssize_t min, Py_ssize_t max, ...)
|
|
{
|
|
Py_ssize_t i, l;
|
|
PyObject **o;
|
|
va_list vargs;
|
|
|
|
#ifdef HAVE_STDARG_PROTOTYPES
|
|
va_start(vargs, max);
|
|
#else
|
|
va_start(vargs);
|
|
#endif
|
|
|
|
assert(min >= 0);
|
|
assert(min <= max);
|
|
if (!PyTuple_Check(args)) {
|
|
PyErr_SetString(PyExc_SystemError,
|
|
"PyArg_UnpackTuple() argument list is not a tuple");
|
|
return 0;
|
|
}
|
|
l = PyTuple_GET_SIZE(args);
|
|
if (l < min) {
|
|
if (name != NULL)
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"%s expected %s%zd arguments, got %zd",
|
|
name, (min == max ? "" : "at least "), min, l);
|
|
else
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"unpacked tuple should have %s%zd elements,"
|
|
" but has %zd",
|
|
(min == max ? "" : "at least "), min, l);
|
|
va_end(vargs);
|
|
return 0;
|
|
}
|
|
if (l > max) {
|
|
if (name != NULL)
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"%s expected %s%zd arguments, got %zd",
|
|
name, (min == max ? "" : "at most "), max, l);
|
|
else
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"unpacked tuple should have %s%zd elements,"
|
|
" but has %zd",
|
|
(min == max ? "" : "at most "), max, l);
|
|
va_end(vargs);
|
|
return 0;
|
|
}
|
|
for (i = 0; i < l; i++) {
|
|
o = va_arg(vargs, PyObject **);
|
|
*o = PyTuple_GET_ITEM(args, i);
|
|
}
|
|
va_end(vargs);
|
|
return 1;
|
|
}
|
|
|
|
|
|
/* For type constructors that don't take keyword args
|
|
*
|
|
* Sets a TypeError and returns 0 if the kwds dict is
|
|
* not empty, returns 1 otherwise
|
|
*/
|
|
int
|
|
_PyArg_NoKeywords(const char *funcname, PyObject *kw)
|
|
{
|
|
if (kw == NULL)
|
|
return 1;
|
|
if (!PyDict_CheckExact(kw)) {
|
|
PyErr_BadInternalCall();
|
|
return 0;
|
|
}
|
|
if (PyDict_Size(kw) == 0)
|
|
return 1;
|
|
|
|
PyErr_Format(PyExc_TypeError, "%s does not take keyword arguments",
|
|
funcname);
|
|
return 0;
|
|
}
|
|
#ifdef __cplusplus
|
|
};
|
|
#endif
|