1463 lines
40 KiB
C
1463 lines
40 KiB
C
|
||
/* Write Python objects to files and read them back.
|
||
This is intended for writing and reading compiled Python code only;
|
||
a true persistent storage facility would be much harder, since
|
||
it would have to take circular links and sharing into account. */
|
||
|
||
#define PY_SSIZE_T_CLEAN
|
||
|
||
#include "Python.h"
|
||
#include "longintrepr.h"
|
||
#include "code.h"
|
||
#include "marshal.h"
|
||
|
||
#define ABS(x) ((x) < 0 ? -(x) : (x))
|
||
|
||
/* High water mark to determine when the marshalled object is dangerously deep
|
||
* and risks coring the interpreter. When the object stack gets this deep,
|
||
* raise an exception instead of continuing.
|
||
* On Windows debug builds, reduce this value.
|
||
*/
|
||
#if defined(MS_WINDOWS) && defined(_DEBUG)
|
||
#define MAX_MARSHAL_STACK_DEPTH 1500
|
||
#else
|
||
#define MAX_MARSHAL_STACK_DEPTH 2000
|
||
#endif
|
||
|
||
#define TYPE_NULL '0'
|
||
#define TYPE_NONE 'N'
|
||
#define TYPE_FALSE 'F'
|
||
#define TYPE_TRUE 'T'
|
||
#define TYPE_STOPITER 'S'
|
||
#define TYPE_ELLIPSIS '.'
|
||
#define TYPE_INT 'i'
|
||
/* TYPE_INT64 is deprecated. It is not
|
||
generated anymore, and support for reading it
|
||
will be removed in Python 3.4. */
|
||
#define TYPE_INT64 'I'
|
||
#define TYPE_FLOAT 'f'
|
||
#define TYPE_BINARY_FLOAT 'g'
|
||
#define TYPE_COMPLEX 'x'
|
||
#define TYPE_BINARY_COMPLEX 'y'
|
||
#define TYPE_LONG 'l'
|
||
#define TYPE_STRING 's'
|
||
#define TYPE_TUPLE '('
|
||
#define TYPE_LIST '['
|
||
#define TYPE_DICT '{'
|
||
#define TYPE_CODE 'c'
|
||
#define TYPE_UNICODE 'u'
|
||
#define TYPE_UNKNOWN '?'
|
||
#define TYPE_SET '<'
|
||
#define TYPE_FROZENSET '>'
|
||
|
||
#define WFERR_OK 0
|
||
#define WFERR_UNMARSHALLABLE 1
|
||
#define WFERR_NESTEDTOODEEP 2
|
||
#define WFERR_NOMEMORY 3
|
||
|
||
typedef struct {
|
||
FILE *fp;
|
||
int error; /* see WFERR_* values */
|
||
int depth;
|
||
/* If fp == NULL, the following are valid: */
|
||
PyObject *readable; /* Stream-like object being read from */
|
||
PyObject *str;
|
||
PyObject *current_filename;
|
||
char *ptr;
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||
char *end;
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||
int version;
|
||
} WFILE;
|
||
|
||
#define w_byte(c, p) if (((p)->fp)) putc((c), (p)->fp); \
|
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else if ((p)->ptr != (p)->end) *(p)->ptr++ = (c); \
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else w_more(c, p)
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||
|
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static void
|
||
w_more(int c, WFILE *p)
|
||
{
|
||
Py_ssize_t size, newsize;
|
||
if (p->str == NULL)
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||
return; /* An error already occurred */
|
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size = PyBytes_Size(p->str);
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newsize = size + size + 1024;
|
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if (newsize > 32*1024*1024) {
|
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newsize = size + (size >> 3); /* 12.5% overallocation */
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||
}
|
||
if (_PyBytes_Resize(&p->str, newsize) != 0) {
|
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p->ptr = p->end = NULL;
|
||
}
|
||
else {
|
||
p->ptr = PyBytes_AS_STRING((PyBytesObject *)p->str) + size;
|
||
p->end =
|
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PyBytes_AS_STRING((PyBytesObject *)p->str) + newsize;
|
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*p->ptr++ = Py_SAFE_DOWNCAST(c, int, char);
|
||
}
|
||
}
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||
|
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static void
|
||
w_string(char *s, int n, WFILE *p)
|
||
{
|
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if (p->fp != NULL) {
|
||
fwrite(s, 1, n, p->fp);
|
||
}
|
||
else {
|
||
while (--n >= 0) {
|
||
w_byte(*s, p);
|
||
s++;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
w_short(int x, WFILE *p)
|
||
{
|
||
w_byte((char)( x & 0xff), p);
|
||
w_byte((char)((x>> 8) & 0xff), p);
|
||
}
|
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|
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static void
|
||
w_long(long x, WFILE *p)
|
||
{
|
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w_byte((char)( x & 0xff), p);
|
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w_byte((char)((x>> 8) & 0xff), p);
|
||
w_byte((char)((x>>16) & 0xff), p);
|
||
w_byte((char)((x>>24) & 0xff), p);
|
||
}
|
||
|
||
/* We assume that Python longs are stored internally in base some power of
|
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2**15; for the sake of portability we'll always read and write them in base
|
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exactly 2**15. */
|
||
|
||
#define PyLong_MARSHAL_SHIFT 15
|
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#define PyLong_MARSHAL_BASE ((short)1 << PyLong_MARSHAL_SHIFT)
|
||
#define PyLong_MARSHAL_MASK (PyLong_MARSHAL_BASE - 1)
|
||
#if PyLong_SHIFT % PyLong_MARSHAL_SHIFT != 0
|
||
#error "PyLong_SHIFT must be a multiple of PyLong_MARSHAL_SHIFT"
|
||
#endif
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#define PyLong_MARSHAL_RATIO (PyLong_SHIFT / PyLong_MARSHAL_SHIFT)
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||
|
||
static void
|
||
w_PyLong(const PyLongObject *ob, WFILE *p)
|
||
{
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Py_ssize_t i, j, n, l;
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digit d;
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|
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w_byte(TYPE_LONG, p);
|
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if (Py_SIZE(ob) == 0) {
|
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w_long((long)0, p);
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return;
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||
}
|
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/* set l to number of base PyLong_MARSHAL_BASE digits */
|
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n = ABS(Py_SIZE(ob));
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l = (n-1) * PyLong_MARSHAL_RATIO;
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d = ob->ob_digit[n-1];
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assert(d != 0); /* a PyLong is always normalized */
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||
do {
|
||
d >>= PyLong_MARSHAL_SHIFT;
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l++;
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} while (d != 0);
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w_long((long)(Py_SIZE(ob) > 0 ? l : -l), p);
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for (i=0; i < n-1; i++) {
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d = ob->ob_digit[i];
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for (j=0; j < PyLong_MARSHAL_RATIO; j++) {
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w_short(d & PyLong_MARSHAL_MASK, p);
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d >>= PyLong_MARSHAL_SHIFT;
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||
}
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assert (d == 0);
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||
}
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d = ob->ob_digit[n-1];
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||
do {
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w_short(d & PyLong_MARSHAL_MASK, p);
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d >>= PyLong_MARSHAL_SHIFT;
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} while (d != 0);
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}
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||
static void
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w_object(PyObject *v, WFILE *p)
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{
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Py_ssize_t i, n;
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p->depth++;
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||
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if (p->depth > MAX_MARSHAL_STACK_DEPTH) {
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p->error = WFERR_NESTEDTOODEEP;
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||
}
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||
else if (v == NULL) {
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w_byte(TYPE_NULL, p);
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||
}
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else if (v == Py_None) {
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w_byte(TYPE_NONE, p);
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||
}
|
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else if (v == PyExc_StopIteration) {
|
||
w_byte(TYPE_STOPITER, p);
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||
}
|
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else if (v == Py_Ellipsis) {
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w_byte(TYPE_ELLIPSIS, p);
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||
}
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||
else if (v == Py_False) {
|
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w_byte(TYPE_FALSE, p);
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||
}
|
||
else if (v == Py_True) {
|
||
w_byte(TYPE_TRUE, p);
|
||
}
|
||
else if (PyLong_CheckExact(v)) {
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||
long x = PyLong_AsLong(v);
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||
if ((x == -1) && PyErr_Occurred()) {
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||
PyLongObject *ob = (PyLongObject *)v;
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||
PyErr_Clear();
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||
w_PyLong(ob, p);
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||
}
|
||
else {
|
||
#if SIZEOF_LONG > 4
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||
long y = Py_ARITHMETIC_RIGHT_SHIFT(long, x, 31);
|
||
if (y && y != -1) {
|
||
/* Too large for TYPE_INT */
|
||
w_PyLong((PyLongObject*)v, p);
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
w_byte(TYPE_INT, p);
|
||
w_long(x, p);
|
||
}
|
||
}
|
||
}
|
||
else if (PyFloat_CheckExact(v)) {
|
||
if (p->version > 1) {
|
||
unsigned char buf[8];
|
||
if (_PyFloat_Pack8(PyFloat_AsDouble(v),
|
||
buf, 1) < 0) {
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_byte(TYPE_BINARY_FLOAT, p);
|
||
w_string((char*)buf, 8, p);
|
||
}
|
||
else {
|
||
char *buf = PyOS_double_to_string(PyFloat_AS_DOUBLE(v),
|
||
'g', 17, 0, NULL);
|
||
if (!buf) {
|
||
p->error = WFERR_NOMEMORY;
|
||
return;
|
||
}
|
||
n = strlen(buf);
|
||
w_byte(TYPE_FLOAT, p);
|
||
w_byte((int)n, p);
|
||
w_string(buf, (int)n, p);
|
||
PyMem_Free(buf);
|
||
}
|
||
}
|
||
else if (PyComplex_CheckExact(v)) {
|
||
if (p->version > 1) {
|
||
unsigned char buf[8];
|
||
if (_PyFloat_Pack8(PyComplex_RealAsDouble(v),
|
||
buf, 1) < 0) {
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_byte(TYPE_BINARY_COMPLEX, p);
|
||
w_string((char*)buf, 8, p);
|
||
if (_PyFloat_Pack8(PyComplex_ImagAsDouble(v),
|
||
buf, 1) < 0) {
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_string((char*)buf, 8, p);
|
||
}
|
||
else {
|
||
char *buf;
|
||
w_byte(TYPE_COMPLEX, p);
|
||
buf = PyOS_double_to_string(PyComplex_RealAsDouble(v),
|
||
'g', 17, 0, NULL);
|
||
if (!buf) {
|
||
p->error = WFERR_NOMEMORY;
|
||
return;
|
||
}
|
||
n = strlen(buf);
|
||
w_byte((int)n, p);
|
||
w_string(buf, (int)n, p);
|
||
PyMem_Free(buf);
|
||
buf = PyOS_double_to_string(PyComplex_ImagAsDouble(v),
|
||
'g', 17, 0, NULL);
|
||
if (!buf) {
|
||
p->error = WFERR_NOMEMORY;
|
||
return;
|
||
}
|
||
n = strlen(buf);
|
||
w_byte((int)n, p);
|
||
w_string(buf, (int)n, p);
|
||
PyMem_Free(buf);
|
||
}
|
||
}
|
||
else if (PyBytes_CheckExact(v)) {
|
||
w_byte(TYPE_STRING, p);
|
||
n = PyBytes_GET_SIZE(v);
|
||
if (n > INT_MAX) {
|
||
/* huge strings are not supported */
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_long((long)n, p);
|
||
w_string(PyBytes_AS_STRING(v), (int)n, p);
|
||
}
|
||
else if (PyUnicode_CheckExact(v)) {
|
||
PyObject *utf8;
|
||
utf8 = PyUnicode_AsEncodedString(v, "utf8", "surrogatepass");
|
||
if (utf8 == NULL) {
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_byte(TYPE_UNICODE, p);
|
||
n = PyBytes_GET_SIZE(utf8);
|
||
if (n > INT_MAX) {
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_long((long)n, p);
|
||
w_string(PyBytes_AS_STRING(utf8), (int)n, p);
|
||
Py_DECREF(utf8);
|
||
}
|
||
else if (PyTuple_CheckExact(v)) {
|
||
w_byte(TYPE_TUPLE, p);
|
||
n = PyTuple_Size(v);
|
||
w_long((long)n, p);
|
||
for (i = 0; i < n; i++) {
|
||
w_object(PyTuple_GET_ITEM(v, i), p);
|
||
}
|
||
}
|
||
else if (PyList_CheckExact(v)) {
|
||
w_byte(TYPE_LIST, p);
|
||
n = PyList_GET_SIZE(v);
|
||
w_long((long)n, p);
|
||
for (i = 0; i < n; i++) {
|
||
w_object(PyList_GET_ITEM(v, i), p);
|
||
}
|
||
}
|
||
else if (PyDict_CheckExact(v)) {
|
||
Py_ssize_t pos;
|
||
PyObject *key, *value;
|
||
w_byte(TYPE_DICT, p);
|
||
/* This one is NULL object terminated! */
|
||
pos = 0;
|
||
while (PyDict_Next(v, &pos, &key, &value)) {
|
||
w_object(key, p);
|
||
w_object(value, p);
|
||
}
|
||
w_object((PyObject *)NULL, p);
|
||
}
|
||
else if (PyAnySet_CheckExact(v)) {
|
||
PyObject *value, *it;
|
||
|
||
if (PyObject_TypeCheck(v, &PySet_Type))
|
||
w_byte(TYPE_SET, p);
|
||
else
|
||
w_byte(TYPE_FROZENSET, p);
|
||
n = PyObject_Size(v);
|
||
if (n == -1) {
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_long((long)n, p);
|
||
it = PyObject_GetIter(v);
|
||
if (it == NULL) {
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
while ((value = PyIter_Next(it)) != NULL) {
|
||
w_object(value, p);
|
||
Py_DECREF(value);
|
||
}
|
||
Py_DECREF(it);
|
||
if (PyErr_Occurred()) {
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
}
|
||
else if (PyCode_Check(v)) {
|
||
PyCodeObject *co = (PyCodeObject *)v;
|
||
w_byte(TYPE_CODE, p);
|
||
w_long(co->co_argcount, p);
|
||
w_long(co->co_kwonlyargcount, p);
|
||
w_long(co->co_nlocals, p);
|
||
w_long(co->co_stacksize, p);
|
||
w_long(co->co_flags, p);
|
||
w_object(co->co_code, p);
|
||
w_object(co->co_consts, p);
|
||
w_object(co->co_names, p);
|
||
w_object(co->co_varnames, p);
|
||
w_object(co->co_freevars, p);
|
||
w_object(co->co_cellvars, p);
|
||
w_object(co->co_filename, p);
|
||
w_object(co->co_name, p);
|
||
w_long(co->co_firstlineno, p);
|
||
w_object(co->co_lnotab, p);
|
||
}
|
||
else if (PyObject_CheckBuffer(v)) {
|
||
/* Write unknown buffer-style objects as a string */
|
||
char *s;
|
||
Py_buffer view;
|
||
if (PyObject_GetBuffer(v, &view, PyBUF_SIMPLE) != 0) {
|
||
w_byte(TYPE_UNKNOWN, p);
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_byte(TYPE_STRING, p);
|
||
n = view.len;
|
||
s = view.buf;
|
||
if (n > INT_MAX) {
|
||
p->depth--;
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
return;
|
||
}
|
||
w_long((long)n, p);
|
||
w_string(s, (int)n, p);
|
||
PyBuffer_Release(&view);
|
||
}
|
||
else {
|
||
w_byte(TYPE_UNKNOWN, p);
|
||
p->error = WFERR_UNMARSHALLABLE;
|
||
}
|
||
p->depth--;
|
||
}
|
||
|
||
/* version currently has no effect for writing longs. */
|
||
void
|
||
PyMarshal_WriteLongToFile(long x, FILE *fp, int version)
|
||
{
|
||
WFILE wf;
|
||
wf.fp = fp;
|
||
wf.error = WFERR_OK;
|
||
wf.depth = 0;
|
||
wf.version = version;
|
||
w_long(x, &wf);
|
||
}
|
||
|
||
void
|
||
PyMarshal_WriteObjectToFile(PyObject *x, FILE *fp, int version)
|
||
{
|
||
WFILE wf;
|
||
wf.fp = fp;
|
||
wf.error = WFERR_OK;
|
||
wf.depth = 0;
|
||
wf.version = version;
|
||
w_object(x, &wf);
|
||
}
|
||
|
||
typedef WFILE RFILE; /* Same struct with different invariants */
|
||
|
||
#define rs_byte(p) (((p)->ptr < (p)->end) ? (unsigned char)*(p)->ptr++ : EOF)
|
||
|
||
static int
|
||
r_string(char *s, int n, RFILE *p)
|
||
{
|
||
char *ptr;
|
||
int read, left;
|
||
|
||
if (!p->readable) {
|
||
if (p->fp != NULL)
|
||
/* The result fits into int because it must be <=n. */
|
||
read = (int) fread(s, 1, n, p->fp);
|
||
else {
|
||
left = (int)(p->end - p->ptr);
|
||
read = (left < n) ? left : n;
|
||
memcpy(s, p->ptr, read);
|
||
p->ptr += read;
|
||
}
|
||
}
|
||
else {
|
||
_Py_IDENTIFIER(read);
|
||
|
||
PyObject *data = _PyObject_CallMethodId(p->readable, &PyId_read, "i", n);
|
||
read = 0;
|
||
if (data != NULL) {
|
||
if (!PyBytes_Check(data)) {
|
||
PyErr_Format(PyExc_TypeError,
|
||
"f.read() returned not bytes but %.100s",
|
||
data->ob_type->tp_name);
|
||
}
|
||
else {
|
||
read = PyBytes_GET_SIZE(data);
|
||
if (read > 0) {
|
||
ptr = PyBytes_AS_STRING(data);
|
||
memcpy(s, ptr, read);
|
||
}
|
||
}
|
||
Py_DECREF(data);
|
||
}
|
||
}
|
||
if (!PyErr_Occurred() && (read < n)) {
|
||
PyErr_SetString(PyExc_EOFError, "EOF read where not expected");
|
||
}
|
||
return read;
|
||
}
|
||
|
||
|
||
static int
|
||
r_byte(RFILE *p)
|
||
{
|
||
int c = EOF;
|
||
unsigned char ch;
|
||
int n;
|
||
|
||
if (!p->readable)
|
||
c = p->fp ? getc(p->fp) : rs_byte(p);
|
||
else {
|
||
n = r_string((char *) &ch, 1, p);
|
||
if (n > 0)
|
||
c = ch;
|
||
}
|
||
return c;
|
||
}
|
||
|
||
static int
|
||
r_short(RFILE *p)
|
||
{
|
||
register short x;
|
||
unsigned char buffer[2];
|
||
|
||
r_string((char *) buffer, 2, p);
|
||
x = buffer[0];
|
||
x |= buffer[1] << 8;
|
||
/* Sign-extension, in case short greater than 16 bits */
|
||
x |= -(x & 0x8000);
|
||
return x;
|
||
}
|
||
|
||
static long
|
||
r_long(RFILE *p)
|
||
{
|
||
register long x;
|
||
unsigned char buffer[4];
|
||
|
||
r_string((char *) buffer, 4, p);
|
||
x = buffer[0];
|
||
x |= (long)buffer[1] << 8;
|
||
x |= (long)buffer[2] << 16;
|
||
x |= (long)buffer[3] << 24;
|
||
#if SIZEOF_LONG > 4
|
||
/* Sign extension for 64-bit machines */
|
||
x |= -(x & 0x80000000L);
|
||
#endif
|
||
return x;
|
||
}
|
||
|
||
/* r_long64 deals with the TYPE_INT64 code. On a machine with
|
||
sizeof(long) > 4, it returns a Python int object, else a Python long
|
||
object. Note that w_long64 writes out TYPE_INT if 32 bits is enough,
|
||
so there's no inefficiency here in returning a PyLong on 32-bit boxes
|
||
for everything written via TYPE_INT64 (i.e., if an int is written via
|
||
TYPE_INT64, it *needs* more than 32 bits).
|
||
*/
|
||
static PyObject *
|
||
r_long64(RFILE *p)
|
||
{
|
||
PyObject *result = NULL;
|
||
long lo4 = r_long(p);
|
||
long hi4 = r_long(p);
|
||
|
||
if (!PyErr_Occurred()) {
|
||
#if SIZEOF_LONG > 4
|
||
long x = (hi4 << 32) | (lo4 & 0xFFFFFFFFL);
|
||
result = PyLong_FromLong(x);
|
||
#else
|
||
unsigned char buf[8];
|
||
int one = 1;
|
||
int is_little_endian = (int)*(char*)&one;
|
||
if (is_little_endian) {
|
||
memcpy(buf, &lo4, 4);
|
||
memcpy(buf+4, &hi4, 4);
|
||
}
|
||
else {
|
||
memcpy(buf, &hi4, 4);
|
||
memcpy(buf+4, &lo4, 4);
|
||
}
|
||
result = _PyLong_FromByteArray(buf, 8, is_little_endian, 1);
|
||
#endif
|
||
}
|
||
return result;
|
||
}
|
||
|
||
static PyObject *
|
||
r_PyLong(RFILE *p)
|
||
{
|
||
PyLongObject *ob;
|
||
int size, i, j, md, shorts_in_top_digit;
|
||
long n;
|
||
digit d;
|
||
|
||
n = r_long(p);
|
||
if (PyErr_Occurred())
|
||
return NULL;
|
||
if (n == 0)
|
||
return (PyObject *)_PyLong_New(0);
|
||
if (n < -INT_MAX || n > INT_MAX) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"bad marshal data (long size out of range)");
|
||
return NULL;
|
||
}
|
||
|
||
size = 1 + (ABS(n) - 1) / PyLong_MARSHAL_RATIO;
|
||
shorts_in_top_digit = 1 + (ABS(n) - 1) % PyLong_MARSHAL_RATIO;
|
||
ob = _PyLong_New(size);
|
||
if (ob == NULL)
|
||
return NULL;
|
||
Py_SIZE(ob) = n > 0 ? size : -size;
|
||
|
||
for (i = 0; i < size-1; i++) {
|
||
d = 0;
|
||
for (j=0; j < PyLong_MARSHAL_RATIO; j++) {
|
||
md = r_short(p);
|
||
if (PyErr_Occurred())
|
||
break;
|
||
if (md < 0 || md > PyLong_MARSHAL_BASE)
|
||
goto bad_digit;
|
||
d += (digit)md << j*PyLong_MARSHAL_SHIFT;
|
||
}
|
||
ob->ob_digit[i] = d;
|
||
}
|
||
d = 0;
|
||
for (j=0; j < shorts_in_top_digit; j++) {
|
||
md = r_short(p);
|
||
if (PyErr_Occurred())
|
||
break;
|
||
if (md < 0 || md > PyLong_MARSHAL_BASE)
|
||
goto bad_digit;
|
||
/* topmost marshal digit should be nonzero */
|
||
if (md == 0 && j == shorts_in_top_digit - 1) {
|
||
Py_DECREF(ob);
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"bad marshal data (unnormalized long data)");
|
||
return NULL;
|
||
}
|
||
d += (digit)md << j*PyLong_MARSHAL_SHIFT;
|
||
}
|
||
if (PyErr_Occurred()) {
|
||
Py_DECREF(ob);
|
||
return NULL;
|
||
}
|
||
/* top digit should be nonzero, else the resulting PyLong won't be
|
||
normalized */
|
||
ob->ob_digit[size-1] = d;
|
||
return (PyObject *)ob;
|
||
bad_digit:
|
||
Py_DECREF(ob);
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"bad marshal data (digit out of range in long)");
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static PyObject *
|
||
r_object(RFILE *p)
|
||
{
|
||
/* NULL is a valid return value, it does not necessarily means that
|
||
an exception is set. */
|
||
PyObject *v, *v2;
|
||
long i, n;
|
||
int type = r_byte(p);
|
||
PyObject *retval;
|
||
|
||
p->depth++;
|
||
|
||
if (p->depth > MAX_MARSHAL_STACK_DEPTH) {
|
||
p->depth--;
|
||
PyErr_SetString(PyExc_ValueError, "recursion limit exceeded");
|
||
return NULL;
|
||
}
|
||
|
||
switch (type) {
|
||
|
||
case EOF:
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
retval = NULL;
|
||
break;
|
||
|
||
case TYPE_NULL:
|
||
retval = NULL;
|
||
break;
|
||
|
||
case TYPE_NONE:
|
||
Py_INCREF(Py_None);
|
||
retval = Py_None;
|
||
break;
|
||
|
||
case TYPE_STOPITER:
|
||
Py_INCREF(PyExc_StopIteration);
|
||
retval = PyExc_StopIteration;
|
||
break;
|
||
|
||
case TYPE_ELLIPSIS:
|
||
Py_INCREF(Py_Ellipsis);
|
||
retval = Py_Ellipsis;
|
||
break;
|
||
|
||
case TYPE_FALSE:
|
||
Py_INCREF(Py_False);
|
||
retval = Py_False;
|
||
break;
|
||
|
||
case TYPE_TRUE:
|
||
Py_INCREF(Py_True);
|
||
retval = Py_True;
|
||
break;
|
||
|
||
case TYPE_INT:
|
||
n = r_long(p);
|
||
retval = PyErr_Occurred() ? NULL : PyLong_FromLong(n);
|
||
break;
|
||
|
||
case TYPE_INT64:
|
||
retval = r_long64(p);
|
||
break;
|
||
|
||
case TYPE_LONG:
|
||
retval = r_PyLong(p);
|
||
break;
|
||
|
||
case TYPE_FLOAT:
|
||
{
|
||
char buf[256];
|
||
double dx;
|
||
retval = NULL;
|
||
n = r_byte(p);
|
||
if (n == EOF || r_string(buf, (int)n, p) != n) {
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
break;
|
||
}
|
||
buf[n] = '\0';
|
||
dx = PyOS_string_to_double(buf, NULL, NULL);
|
||
if (dx == -1.0 && PyErr_Occurred())
|
||
break;
|
||
retval = PyFloat_FromDouble(dx);
|
||
break;
|
||
}
|
||
|
||
case TYPE_BINARY_FLOAT:
|
||
{
|
||
unsigned char buf[8];
|
||
double x;
|
||
if (r_string((char*)buf, 8, p) != 8) {
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
x = _PyFloat_Unpack8(buf, 1);
|
||
if (x == -1.0 && PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
retval = PyFloat_FromDouble(x);
|
||
break;
|
||
}
|
||
|
||
case TYPE_COMPLEX:
|
||
{
|
||
char buf[256];
|
||
Py_complex c;
|
||
retval = NULL;
|
||
n = r_byte(p);
|
||
if (n == EOF || r_string(buf, (int)n, p) != n) {
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
break;
|
||
}
|
||
buf[n] = '\0';
|
||
c.real = PyOS_string_to_double(buf, NULL, NULL);
|
||
if (c.real == -1.0 && PyErr_Occurred())
|
||
break;
|
||
n = r_byte(p);
|
||
if (n == EOF || r_string(buf, (int)n, p) != n) {
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
break;
|
||
}
|
||
buf[n] = '\0';
|
||
c.imag = PyOS_string_to_double(buf, NULL, NULL);
|
||
if (c.imag == -1.0 && PyErr_Occurred())
|
||
break;
|
||
retval = PyComplex_FromCComplex(c);
|
||
break;
|
||
}
|
||
|
||
case TYPE_BINARY_COMPLEX:
|
||
{
|
||
unsigned char buf[8];
|
||
Py_complex c;
|
||
if (r_string((char*)buf, 8, p) != 8) {
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
c.real = _PyFloat_Unpack8(buf, 1);
|
||
if (c.real == -1.0 && PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (r_string((char*)buf, 8, p) != 8) {
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
c.imag = _PyFloat_Unpack8(buf, 1);
|
||
if (c.imag == -1.0 && PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
retval = PyComplex_FromCComplex(c);
|
||
break;
|
||
}
|
||
|
||
case TYPE_STRING:
|
||
n = r_long(p);
|
||
if (PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (n < 0 || n > INT_MAX) {
|
||
PyErr_SetString(PyExc_ValueError, "bad marshal data (string size out of range)");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
v = PyBytes_FromStringAndSize((char *)NULL, n);
|
||
if (v == NULL) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (r_string(PyBytes_AS_STRING(v), (int)n, p) != n) {
|
||
Py_DECREF(v);
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
retval = v;
|
||
break;
|
||
|
||
case TYPE_UNICODE:
|
||
{
|
||
char *buffer;
|
||
|
||
n = r_long(p);
|
||
if (PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (n < 0 || n > INT_MAX) {
|
||
PyErr_SetString(PyExc_ValueError, "bad marshal data (unicode size out of range)");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
buffer = PyMem_NEW(char, n);
|
||
if (buffer == NULL) {
|
||
retval = PyErr_NoMemory();
|
||
break;
|
||
}
|
||
if (r_string(buffer, (int)n, p) != n) {
|
||
PyMem_DEL(buffer);
|
||
PyErr_SetString(PyExc_EOFError,
|
||
"EOF read where object expected");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
v = PyUnicode_DecodeUTF8(buffer, n, "surrogatepass");
|
||
PyMem_DEL(buffer);
|
||
retval = v;
|
||
break;
|
||
}
|
||
|
||
case TYPE_TUPLE:
|
||
n = r_long(p);
|
||
if (PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (n < 0 || n > INT_MAX) {
|
||
PyErr_SetString(PyExc_ValueError, "bad marshal data (tuple size out of range)");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
v = PyTuple_New((int)n);
|
||
if (v == NULL) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
for (i = 0; i < n; i++) {
|
||
v2 = r_object(p);
|
||
if ( v2 == NULL ) {
|
||
if (!PyErr_Occurred())
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"NULL object in marshal data for tuple");
|
||
Py_DECREF(v);
|
||
v = NULL;
|
||
break;
|
||
}
|
||
PyTuple_SET_ITEM(v, (int)i, v2);
|
||
}
|
||
retval = v;
|
||
break;
|
||
|
||
case TYPE_LIST:
|
||
n = r_long(p);
|
||
if (PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (n < 0 || n > INT_MAX) {
|
||
PyErr_SetString(PyExc_ValueError, "bad marshal data (list size out of range)");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
v = PyList_New((int)n);
|
||
if (v == NULL) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
for (i = 0; i < n; i++) {
|
||
v2 = r_object(p);
|
||
if ( v2 == NULL ) {
|
||
if (!PyErr_Occurred())
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"NULL object in marshal data for list");
|
||
Py_DECREF(v);
|
||
v = NULL;
|
||
break;
|
||
}
|
||
PyList_SET_ITEM(v, (int)i, v2);
|
||
}
|
||
retval = v;
|
||
break;
|
||
|
||
case TYPE_DICT:
|
||
v = PyDict_New();
|
||
if (v == NULL) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
for (;;) {
|
||
PyObject *key, *val;
|
||
key = r_object(p);
|
||
if (key == NULL)
|
||
break;
|
||
val = r_object(p);
|
||
if (val != NULL)
|
||
PyDict_SetItem(v, key, val);
|
||
Py_DECREF(key);
|
||
Py_XDECREF(val);
|
||
}
|
||
if (PyErr_Occurred()) {
|
||
Py_DECREF(v);
|
||
v = NULL;
|
||
}
|
||
retval = v;
|
||
break;
|
||
|
||
case TYPE_SET:
|
||
case TYPE_FROZENSET:
|
||
n = r_long(p);
|
||
if (PyErr_Occurred()) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
if (n < 0 || n > INT_MAX) {
|
||
PyErr_SetString(PyExc_ValueError, "bad marshal data (set size out of range)");
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
v = (type == TYPE_SET) ? PySet_New(NULL) : PyFrozenSet_New(NULL);
|
||
if (v == NULL) {
|
||
retval = NULL;
|
||
break;
|
||
}
|
||
for (i = 0; i < n; i++) {
|
||
v2 = r_object(p);
|
||
if ( v2 == NULL ) {
|
||
if (!PyErr_Occurred())
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"NULL object in marshal data for set");
|
||
Py_DECREF(v);
|
||
v = NULL;
|
||
break;
|
||
}
|
||
if (PySet_Add(v, v2) == -1) {
|
||
Py_DECREF(v);
|
||
Py_DECREF(v2);
|
||
v = NULL;
|
||
break;
|
||
}
|
||
Py_DECREF(v2);
|
||
}
|
||
retval = v;
|
||
break;
|
||
|
||
case TYPE_CODE:
|
||
{
|
||
int argcount;
|
||
int kwonlyargcount;
|
||
int nlocals;
|
||
int stacksize;
|
||
int flags;
|
||
PyObject *code = NULL;
|
||
PyObject *consts = NULL;
|
||
PyObject *names = NULL;
|
||
PyObject *varnames = NULL;
|
||
PyObject *freevars = NULL;
|
||
PyObject *cellvars = NULL;
|
||
PyObject *filename = NULL;
|
||
PyObject *name = NULL;
|
||
int firstlineno;
|
||
PyObject *lnotab = NULL;
|
||
|
||
v = NULL;
|
||
|
||
/* XXX ignore long->int overflows for now */
|
||
argcount = (int)r_long(p);
|
||
if (PyErr_Occurred())
|
||
goto code_error;
|
||
kwonlyargcount = (int)r_long(p);
|
||
if (PyErr_Occurred())
|
||
goto code_error;
|
||
nlocals = (int)r_long(p);
|
||
if (PyErr_Occurred())
|
||
goto code_error;
|
||
stacksize = (int)r_long(p);
|
||
if (PyErr_Occurred())
|
||
goto code_error;
|
||
flags = (int)r_long(p);
|
||
if (PyErr_Occurred())
|
||
goto code_error;
|
||
code = r_object(p);
|
||
if (code == NULL)
|
||
goto code_error;
|
||
consts = r_object(p);
|
||
if (consts == NULL)
|
||
goto code_error;
|
||
names = r_object(p);
|
||
if (names == NULL)
|
||
goto code_error;
|
||
varnames = r_object(p);
|
||
if (varnames == NULL)
|
||
goto code_error;
|
||
freevars = r_object(p);
|
||
if (freevars == NULL)
|
||
goto code_error;
|
||
cellvars = r_object(p);
|
||
if (cellvars == NULL)
|
||
goto code_error;
|
||
filename = r_object(p);
|
||
if (filename == NULL)
|
||
goto code_error;
|
||
if (PyUnicode_CheckExact(filename)) {
|
||
if (p->current_filename != NULL) {
|
||
if (!PyUnicode_Compare(filename, p->current_filename)) {
|
||
Py_DECREF(filename);
|
||
Py_INCREF(p->current_filename);
|
||
filename = p->current_filename;
|
||
}
|
||
}
|
||
else {
|
||
p->current_filename = filename;
|
||
}
|
||
}
|
||
name = r_object(p);
|
||
if (name == NULL)
|
||
goto code_error;
|
||
firstlineno = (int)r_long(p);
|
||
lnotab = r_object(p);
|
||
if (lnotab == NULL)
|
||
goto code_error;
|
||
|
||
v = (PyObject *) PyCode_New(
|
||
argcount, kwonlyargcount,
|
||
nlocals, stacksize, flags,
|
||
code, consts, names, varnames,
|
||
freevars, cellvars, filename, name,
|
||
firstlineno, lnotab);
|
||
|
||
code_error:
|
||
Py_XDECREF(code);
|
||
Py_XDECREF(consts);
|
||
Py_XDECREF(names);
|
||
Py_XDECREF(varnames);
|
||
Py_XDECREF(freevars);
|
||
Py_XDECREF(cellvars);
|
||
Py_XDECREF(filename);
|
||
Py_XDECREF(name);
|
||
Py_XDECREF(lnotab);
|
||
}
|
||
retval = v;
|
||
break;
|
||
|
||
default:
|
||
/* Bogus data got written, which isn't ideal.
|
||
This will let you keep working and recover. */
|
||
PyErr_SetString(PyExc_ValueError, "bad marshal data (unknown type code)");
|
||
retval = NULL;
|
||
break;
|
||
|
||
}
|
||
p->depth--;
|
||
return retval;
|
||
}
|
||
|
||
static PyObject *
|
||
read_object(RFILE *p)
|
||
{
|
||
PyObject *v;
|
||
if (PyErr_Occurred()) {
|
||
fprintf(stderr, "XXX readobject called with exception set\n");
|
||
return NULL;
|
||
}
|
||
v = r_object(p);
|
||
if (v == NULL && !PyErr_Occurred())
|
||
PyErr_SetString(PyExc_TypeError, "NULL object in marshal data for object");
|
||
return v;
|
||
}
|
||
|
||
int
|
||
PyMarshal_ReadShortFromFile(FILE *fp)
|
||
{
|
||
RFILE rf;
|
||
assert(fp);
|
||
rf.readable = NULL;
|
||
rf.fp = fp;
|
||
rf.current_filename = NULL;
|
||
rf.end = rf.ptr = NULL;
|
||
return r_short(&rf);
|
||
}
|
||
|
||
long
|
||
PyMarshal_ReadLongFromFile(FILE *fp)
|
||
{
|
||
RFILE rf;
|
||
rf.fp = fp;
|
||
rf.readable = NULL;
|
||
rf.current_filename = NULL;
|
||
rf.ptr = rf.end = NULL;
|
||
return r_long(&rf);
|
||
}
|
||
|
||
#ifdef HAVE_FSTAT
|
||
/* Return size of file in bytes; < 0 if unknown. */
|
||
static off_t
|
||
getfilesize(FILE *fp)
|
||
{
|
||
struct stat st;
|
||
if (fstat(fileno(fp), &st) != 0)
|
||
return -1;
|
||
else
|
||
return st.st_size;
|
||
}
|
||
#endif
|
||
|
||
/* If we can get the size of the file up-front, and it's reasonably small,
|
||
* read it in one gulp and delegate to ...FromString() instead. Much quicker
|
||
* than reading a byte at a time from file; speeds .pyc imports.
|
||
* CAUTION: since this may read the entire remainder of the file, don't
|
||
* call it unless you know you're done with the file.
|
||
*/
|
||
PyObject *
|
||
PyMarshal_ReadLastObjectFromFile(FILE *fp)
|
||
{
|
||
/* REASONABLE_FILE_LIMIT is by defn something big enough for Tkinter.pyc. */
|
||
#define REASONABLE_FILE_LIMIT (1L << 18)
|
||
#ifdef HAVE_FSTAT
|
||
off_t filesize;
|
||
filesize = getfilesize(fp);
|
||
if (filesize > 0 && filesize <= REASONABLE_FILE_LIMIT) {
|
||
char* pBuf = (char *)PyMem_MALLOC(filesize);
|
||
if (pBuf != NULL) {
|
||
PyObject* v;
|
||
size_t n;
|
||
/* filesize must fit into an int, because it
|
||
is smaller than REASONABLE_FILE_LIMIT */
|
||
n = fread(pBuf, 1, (int)filesize, fp);
|
||
v = PyMarshal_ReadObjectFromString(pBuf, n);
|
||
PyMem_FREE(pBuf);
|
||
return v;
|
||
}
|
||
|
||
}
|
||
#endif
|
||
/* We don't have fstat, or we do but the file is larger than
|
||
* REASONABLE_FILE_LIMIT or malloc failed -- read a byte at a time.
|
||
*/
|
||
return PyMarshal_ReadObjectFromFile(fp);
|
||
|
||
#undef REASONABLE_FILE_LIMIT
|
||
}
|
||
|
||
PyObject *
|
||
PyMarshal_ReadObjectFromFile(FILE *fp)
|
||
{
|
||
RFILE rf;
|
||
PyObject *result;
|
||
rf.fp = fp;
|
||
rf.readable = NULL;
|
||
rf.current_filename = NULL;
|
||
rf.depth = 0;
|
||
rf.ptr = rf.end = NULL;
|
||
result = r_object(&rf);
|
||
return result;
|
||
}
|
||
|
||
PyObject *
|
||
PyMarshal_ReadObjectFromString(char *str, Py_ssize_t len)
|
||
{
|
||
RFILE rf;
|
||
PyObject *result;
|
||
rf.fp = NULL;
|
||
rf.readable = NULL;
|
||
rf.current_filename = NULL;
|
||
rf.ptr = str;
|
||
rf.end = str + len;
|
||
rf.depth = 0;
|
||
result = r_object(&rf);
|
||
return result;
|
||
}
|
||
|
||
PyObject *
|
||
PyMarshal_WriteObjectToString(PyObject *x, int version)
|
||
{
|
||
WFILE wf;
|
||
|
||
wf.fp = NULL;
|
||
wf.readable = NULL;
|
||
wf.str = PyBytes_FromStringAndSize((char *)NULL, 50);
|
||
if (wf.str == NULL)
|
||
return NULL;
|
||
wf.ptr = PyBytes_AS_STRING((PyBytesObject *)wf.str);
|
||
wf.end = wf.ptr + PyBytes_Size(wf.str);
|
||
wf.error = WFERR_OK;
|
||
wf.depth = 0;
|
||
wf.version = version;
|
||
w_object(x, &wf);
|
||
if (wf.str != NULL) {
|
||
char *base = PyBytes_AS_STRING((PyBytesObject *)wf.str);
|
||
if (wf.ptr - base > PY_SSIZE_T_MAX) {
|
||
Py_DECREF(wf.str);
|
||
PyErr_SetString(PyExc_OverflowError,
|
||
"too much marshal data for a string");
|
||
return NULL;
|
||
}
|
||
if (_PyBytes_Resize(&wf.str, (Py_ssize_t)(wf.ptr - base)) < 0)
|
||
return NULL;
|
||
}
|
||
if (wf.error != WFERR_OK) {
|
||
Py_XDECREF(wf.str);
|
||
if (wf.error == WFERR_NOMEMORY)
|
||
PyErr_NoMemory();
|
||
else
|
||
PyErr_SetString(PyExc_ValueError,
|
||
(wf.error==WFERR_UNMARSHALLABLE)?"unmarshallable object"
|
||
:"object too deeply nested to marshal");
|
||
return NULL;
|
||
}
|
||
return wf.str;
|
||
}
|
||
|
||
/* And an interface for Python programs... */
|
||
|
||
static PyObject *
|
||
marshal_dump(PyObject *self, PyObject *args)
|
||
{
|
||
/* XXX Quick hack -- need to do this differently */
|
||
PyObject *x;
|
||
PyObject *f;
|
||
int version = Py_MARSHAL_VERSION;
|
||
PyObject *s;
|
||
PyObject *res;
|
||
_Py_IDENTIFIER(write);
|
||
|
||
if (!PyArg_ParseTuple(args, "OO|i:dump", &x, &f, &version))
|
||
return NULL;
|
||
s = PyMarshal_WriteObjectToString(x, version);
|
||
if (s == NULL)
|
||
return NULL;
|
||
res = _PyObject_CallMethodId(f, &PyId_write, "O", s);
|
||
Py_DECREF(s);
|
||
return res;
|
||
}
|
||
|
||
PyDoc_STRVAR(dump_doc,
|
||
"dump(value, file[, version])\n\
|
||
\n\
|
||
Write the value on the open file. The value must be a supported type.\n\
|
||
The file must be an open file object such as sys.stdout or returned by\n\
|
||
open() or os.popen(). It must be opened in binary mode ('wb' or 'w+b').\n\
|
||
\n\
|
||
If the value has (or contains an object that has) an unsupported type, a\n\
|
||
ValueError exception is raised — but garbage data will also be written\n\
|
||
to the file. The object will not be properly read back by load()\n\
|
||
\n\
|
||
The version argument indicates the data format that dump should use.");
|
||
|
||
static PyObject *
|
||
marshal_load(PyObject *self, PyObject *f)
|
||
{
|
||
PyObject *data, *result;
|
||
_Py_IDENTIFIER(read);
|
||
RFILE rf;
|
||
|
||
/*
|
||
* Make a call to the read method, but read zero bytes.
|
||
* This is to ensure that the object passed in at least
|
||
* has a read method which returns bytes.
|
||
*/
|
||
data = _PyObject_CallMethodId(f, &PyId_read, "i", 0);
|
||
if (data == NULL)
|
||
return NULL;
|
||
if (!PyBytes_Check(data)) {
|
||
PyErr_Format(PyExc_TypeError,
|
||
"f.read() returned not bytes but %.100s",
|
||
data->ob_type->tp_name);
|
||
result = NULL;
|
||
}
|
||
else {
|
||
rf.depth = 0;
|
||
rf.fp = NULL;
|
||
rf.readable = f;
|
||
rf.current_filename = NULL;
|
||
result = read_object(&rf);
|
||
}
|
||
Py_DECREF(data);
|
||
return result;
|
||
}
|
||
|
||
PyDoc_STRVAR(load_doc,
|
||
"load(file)\n\
|
||
\n\
|
||
Read one value from the open file and return it. If no valid value is\n\
|
||
read (e.g. because the data has a different Python version’s\n\
|
||
incompatible marshal format), raise EOFError, ValueError or TypeError.\n\
|
||
The file must be an open file object opened in binary mode ('rb' or\n\
|
||
'r+b').\n\
|
||
\n\
|
||
Note: If an object containing an unsupported type was marshalled with\n\
|
||
dump(), load() will substitute None for the unmarshallable type.");
|
||
|
||
|
||
static PyObject *
|
||
marshal_dumps(PyObject *self, PyObject *args)
|
||
{
|
||
PyObject *x;
|
||
int version = Py_MARSHAL_VERSION;
|
||
if (!PyArg_ParseTuple(args, "O|i:dumps", &x, &version))
|
||
return NULL;
|
||
return PyMarshal_WriteObjectToString(x, version);
|
||
}
|
||
|
||
PyDoc_STRVAR(dumps_doc,
|
||
"dumps(value[, version])\n\
|
||
\n\
|
||
Return the string that would be written to a file by dump(value, file).\n\
|
||
The value must be a supported type. Raise a ValueError exception if\n\
|
||
value has (or contains an object that has) an unsupported type.\n\
|
||
\n\
|
||
The version argument indicates the data format that dumps should use.");
|
||
|
||
|
||
static PyObject *
|
||
marshal_loads(PyObject *self, PyObject *args)
|
||
{
|
||
RFILE rf;
|
||
Py_buffer p;
|
||
char *s;
|
||
Py_ssize_t n;
|
||
PyObject* result;
|
||
if (!PyArg_ParseTuple(args, "y*:loads", &p))
|
||
return NULL;
|
||
s = p.buf;
|
||
n = p.len;
|
||
rf.fp = NULL;
|
||
rf.readable = NULL;
|
||
rf.current_filename = NULL;
|
||
rf.ptr = s;
|
||
rf.end = s + n;
|
||
rf.depth = 0;
|
||
result = read_object(&rf);
|
||
PyBuffer_Release(&p);
|
||
return result;
|
||
}
|
||
|
||
PyDoc_STRVAR(loads_doc,
|
||
"loads(bytes)\n\
|
||
\n\
|
||
Convert the bytes object to a value. If no valid value is found, raise\n\
|
||
EOFError, ValueError or TypeError. Extra characters in the input are\n\
|
||
ignored.");
|
||
|
||
static PyMethodDef marshal_methods[] = {
|
||
{"dump", marshal_dump, METH_VARARGS, dump_doc},
|
||
{"load", marshal_load, METH_O, load_doc},
|
||
{"dumps", marshal_dumps, METH_VARARGS, dumps_doc},
|
||
{"loads", marshal_loads, METH_VARARGS, loads_doc},
|
||
{NULL, NULL} /* sentinel */
|
||
};
|
||
|
||
|
||
PyDoc_STRVAR(module_doc,
|
||
"This module contains functions that can read and write Python values in\n\
|
||
a binary format. The format is specific to Python, but independent of\n\
|
||
machine architecture issues.\n\
|
||
\n\
|
||
Not all Python object types are supported; in general, only objects\n\
|
||
whose value is independent from a particular invocation of Python can be\n\
|
||
written and read by this module. The following types are supported:\n\
|
||
None, integers, floating point numbers, strings, bytes, bytearrays,\n\
|
||
tuples, lists, sets, dictionaries, and code objects, where it\n\
|
||
should be understood that tuples, lists and dictionaries are only\n\
|
||
supported as long as the values contained therein are themselves\n\
|
||
supported; and recursive lists and dictionaries should not be written\n\
|
||
(they will cause infinite loops).\n\
|
||
\n\
|
||
Variables:\n\
|
||
\n\
|
||
version -- indicates the format that the module uses. Version 0 is the\n\
|
||
historical format, version 1 shares interned strings and version 2\n\
|
||
uses a binary format for floating point numbers.\n\
|
||
\n\
|
||
Functions:\n\
|
||
\n\
|
||
dump() -- write value to a file\n\
|
||
load() -- read value from a file\n\
|
||
dumps() -- write value to a string\n\
|
||
loads() -- read value from a string");
|
||
|
||
|
||
|
||
static struct PyModuleDef marshalmodule = {
|
||
PyModuleDef_HEAD_INIT,
|
||
"marshal",
|
||
module_doc,
|
||
0,
|
||
marshal_methods,
|
||
NULL,
|
||
NULL,
|
||
NULL,
|
||
NULL
|
||
};
|
||
|
||
PyMODINIT_FUNC
|
||
PyMarshal_Init(void)
|
||
{
|
||
PyObject *mod = PyModule_Create(&marshalmodule);
|
||
if (mod == NULL)
|
||
return NULL;
|
||
PyModule_AddIntConstant(mod, "version", Py_MARSHAL_VERSION);
|
||
return mod;
|
||
}
|