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cPickle.c
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cPickle.c
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#include "Python.h"
#include "cStringIO.h"
#include "structmember.h"
PyDoc_STRVAR(cPickle_module_documentation,
"C implementation and optimization of the Python pickle module.");
#ifndef Py_eval_input
#include <graminit.h>
#define Py_eval_input eval_input
#endif /* Py_eval_input */
#define DEL_LIST_SLICE(list, from, to) (PyList_SetSlice(list, from, to, NULL))
#define WRITE_BUF_SIZE 256
/* Bump this when new opcodes are added to the pickle protocol. */
#define HIGHEST_PROTOCOL 2
/*
* Pickle opcodes. These must be kept in synch with pickle.py. Extensive
* docs are in pickletools.py.
*/
#define MARK '('
#define STOP '.'
#define POP '0'
#define POP_MARK '1'
#define DUP '2'
#define FLOAT 'F'
#define BINFLOAT 'G'
#define INT 'I'
#define BININT 'J'
#define BININT1 'K'
#define LONG 'L'
#define BININT2 'M'
#define NONE 'N'
#define PERSID 'P'
#define BINPERSID 'Q'
#define REDUCE 'R'
#define STRING 'S'
#define BINSTRING 'T'
#define SHORT_BINSTRING 'U'
#define UNICODE 'V'
#define BINUNICODE 'X'
#define APPEND 'a'
#define BUILD 'b'
#define GLOBAL 'c'
#define DICT 'd'
#define EMPTY_DICT '}'
#define APPENDS 'e'
#define GET 'g'
#define BINGET 'h'
#define INST 'i'
#define LONG_BINGET 'j'
#define LIST 'l'
#define EMPTY_LIST ']'
#define OBJ 'o'
#define PUT 'p'
#define BINPUT 'q'
#define LONG_BINPUT 'r'
#define SETITEM 's'
#define TUPLE 't'
#define EMPTY_TUPLE ')'
#define SETITEMS 'u'
/* Protocol 2. */
#define PROTO '\x80' /* identify pickle protocol */
#define NEWOBJ '\x81' /* build object by applying cls.__new__ to argtuple */
#define EXT1 '\x82' /* push object from extension registry; 1-byte index */
#define EXT2 '\x83' /* ditto, but 2-byte index */
#define EXT4 '\x84' /* ditto, but 4-byte index */
#define TUPLE1 '\x85' /* build 1-tuple from stack top */
#define TUPLE2 '\x86' /* build 2-tuple from two topmost stack items */
#define TUPLE3 '\x87' /* build 3-tuple from three topmost stack items */
#define NEWTRUE '\x88' /* push True */
#define NEWFALSE '\x89' /* push False */
#define LONG1 '\x8a' /* push long from < 256 bytes */
#define LONG4 '\x8b' /* push really big long */
/* There aren't opcodes -- they're ways to pickle bools before protocol 2,
* so that unpicklers written before bools were introduced unpickle them
* as ints, but unpicklers after can recognize that bools were intended.
* Note that protocol 2 added direct ways to pickle bools.
*/
#undef TRUE
#define TRUE "I01\n"
#undef FALSE
#define FALSE "I00\n"
/* Keep in synch with pickle.Pickler._BATCHSIZE. This is how many elements
* batch_list/dict() pumps out before doing APPENDS/SETITEMS. Nothing will
* break if this gets out of synch with pickle.py, but it's unclear that
* would help anything either.
*/
#define BATCHSIZE 1000
static char MARKv = MARK;
static PyObject *PickleError;
static PyObject *PicklingError;
static PyObject *UnpickleableError;
static PyObject *UnpicklingError;
static PyObject *BadPickleGet;
/* As the name says, an empty tuple. */
static PyObject *empty_tuple;
/* copy_reg.dispatch_table, {type_object: pickling_function} */
static PyObject *dispatch_table;
/* For EXT[124] opcodes. */
/* copy_reg._extension_registry, {(module_name, function_name): code} */
static PyObject *extension_registry;
/* copy_reg._inverted_registry, {code: (module_name, function_name)} */
static PyObject *inverted_registry;
/* copy_reg._extension_cache, {code: object} */
static PyObject *extension_cache;
/* For looking up name pairs in copy_reg._extension_registry. */
static PyObject *two_tuple;
static PyObject *__class___str, *__getinitargs___str, *__dict___str,
*__getstate___str, *__setstate___str, *__name___str, *__reduce___str,
*__reduce_ex___str,
*write_str, *append_str,
*read_str, *readline_str, *__main___str,
*copy_reg_str, *dispatch_table_str;
/*************************************************************************
Internal Data type for pickle data. */
typedef struct {
PyObject_HEAD
int length; /* number of initial slots in data currently used */
int size; /* number of slots in data allocated */
PyObject **data;
} Pdata;
static void
Pdata_dealloc(Pdata *self)
{
int i;
PyObject **p;
for (i = self->length, p = self->data; --i >= 0; p++) {
Py_DECREF(*p);
}
if (self->data)
free(self->data);
PyObject_Del(self);
}
static PyTypeObject PdataType = {
PyObject_HEAD_INIT(NULL) 0, "cPickle.Pdata", sizeof(Pdata), 0,
(destructor)Pdata_dealloc,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0L,0L,0L,0L, ""
};
#define Pdata_Check(O) ((O)->ob_type == &PdataType)
static PyObject *
Pdata_New(void)
{
Pdata *self;
if (!(self = PyObject_New(Pdata, &PdataType)))
return NULL;
self->size = 8;
self->length = 0;
self->data = malloc(self->size * sizeof(PyObject*));
if (self->data)
return (PyObject*)self;
Py_DECREF(self);
return PyErr_NoMemory();
}
static int
stackUnderflow(void)
{
PyErr_SetString(UnpicklingError, "unpickling stack underflow");
return -1;
}
/* Retain only the initial clearto items. If clearto >= the current
* number of items, this is a (non-erroneous) NOP.
*/
static int
Pdata_clear(Pdata *self, int clearto)
{
int i;
PyObject **p;
if (clearto < 0) return stackUnderflow();
if (clearto >= self->length) return 0;
for (i = self->length, p = self->data + clearto;
--i >= clearto;
p++) {
Py_CLEAR(*p);
}
self->length = clearto;
return 0;
}
static int
Pdata_grow(Pdata *self)
{
int bigger;
size_t nbytes;
PyObject **tmp;
bigger = self->size << 1;
if (bigger <= 0) /* was 0, or new value overflows */
goto nomemory;
if ((int)(size_t)bigger != bigger)
goto nomemory;
nbytes = (size_t)bigger * sizeof(PyObject *);
if (nbytes / sizeof(PyObject *) != (size_t)bigger)
goto nomemory;
tmp = realloc(self->data, nbytes);
if (tmp == NULL)
goto nomemory;
self->data = tmp;
self->size = bigger;
return 0;
nomemory:
PyErr_NoMemory();
return -1;
}
/* D is a Pdata*. Pop the topmost element and store it into V, which
* must be an lvalue holding PyObject*. On stack underflow, UnpicklingError
* is raised and V is set to NULL. D and V may be evaluated several times.
*/
#define PDATA_POP(D, V) { \
if ((D)->length) \
(V) = (D)->data[--((D)->length)]; \
else { \
PyErr_SetString(UnpicklingError, "bad pickle data"); \
(V) = NULL; \
} \
}
/* PDATA_PUSH and PDATA_APPEND both push rvalue PyObject* O on to Pdata*
* D. If the Pdata stack can't be grown to hold the new value, both
* raise MemoryError and execute "return ER". The difference is in ownership
* of O after: _PUSH transfers ownership of O from the caller to the stack
* (no incref of O is done, and in case of error O is decrefed), while
* _APPEND pushes a new reference.
*/
/* Push O on stack D, giving ownership of O to the stack. */
#define PDATA_PUSH(D, O, ER) { \
if (((Pdata*)(D))->length == ((Pdata*)(D))->size && \
Pdata_grow((Pdata*)(D)) < 0) { \
Py_DECREF(O); \
return ER; \
} \
((Pdata*)(D))->data[((Pdata*)(D))->length++] = (O); \
}
/* Push O on stack D, pushing a new reference. */
#define PDATA_APPEND(D, O, ER) { \
if (((Pdata*)(D))->length == ((Pdata*)(D))->size && \
Pdata_grow((Pdata*)(D)) < 0) \
return ER; \
Py_INCREF(O); \
((Pdata*)(D))->data[((Pdata*)(D))->length++] = (O); \
}
static PyObject *
Pdata_popTuple(Pdata *self, int start)
{
PyObject *r;
int i, j, l;
l = self->length-start;
r = PyTuple_New(l);
if (r == NULL)
return NULL;
for (i = start, j = 0 ; j < l; i++, j++)
PyTuple_SET_ITEM(r, j, self->data[i]);
self->length = start;
return r;
}
static PyObject *
Pdata_popList(Pdata *self, int start)
{
PyObject *r;
int i, j, l;
l=self->length-start;
if (!( r=PyList_New(l))) return NULL;
for (i=start, j=0 ; j < l; i++, j++)
PyList_SET_ITEM(r, j, self->data[i]);
self->length=start;
return r;
}
/*************************************************************************/
#define ARG_TUP(self, o) { \
if (self->arg || (self->arg=PyTuple_New(1))) { \
Py_XDECREF(PyTuple_GET_ITEM(self->arg,0)); \
PyTuple_SET_ITEM(self->arg,0,o); \
} \
else { \
Py_DECREF(o); \
} \
}
#define FREE_ARG_TUP(self) { \
if (self->arg->ob_refcnt > 1) { \
Py_DECREF(self->arg); \
self->arg=NULL; \
} \
}
typedef struct Picklerobject {
PyObject_HEAD
FILE *fp;
PyObject *write;
PyObject *file;
PyObject *memo;
PyObject *arg;
PyObject *pers_func;
PyObject *inst_pers_func;
/* pickle protocol number, >= 0 */
int proto;
/* bool, true if proto > 0 */
int bin;
int fast; /* Fast mode doesn't save in memo, don't use if circ ref */
int nesting;
int (*write_func)(struct Picklerobject *, const char *, Py_ssize_t);
char *write_buf;
int buf_size;
PyObject *dispatch_table;
int fast_container; /* count nested container dumps */
PyObject *fast_memo;
} Picklerobject;
#ifndef PY_CPICKLE_FAST_LIMIT
#define PY_CPICKLE_FAST_LIMIT 50
#endif
static PyTypeObject Picklertype;
typedef struct Unpicklerobject {
PyObject_HEAD
FILE *fp;
PyObject *file;
PyObject *readline;
PyObject *read;
PyObject *memo;
PyObject *arg;
Pdata *stack;
PyObject *mark;
PyObject *pers_func;
PyObject *last_string;
int *marks;
int num_marks;
int marks_size;
Py_ssize_t (*read_func)(struct Unpicklerobject *, char **, Py_ssize_t);
Py_ssize_t (*readline_func)(struct Unpicklerobject *, char **);
int buf_size;
char *buf;
PyObject *find_class;
} Unpicklerobject;
static PyTypeObject Unpicklertype;
/* Forward decls that need the above structs */
static int save(Picklerobject *, PyObject *, int);
static int put2(Picklerobject *, PyObject *);
static
PyObject *
cPickle_ErrFormat(PyObject *ErrType, char *stringformat, char *format, ...)
{
va_list va;
PyObject *args=0, *retval=0;
va_start(va, format);
if (format) args = Py_VaBuildValue(format, va);
va_end(va);
if (format && ! args) return NULL;
if (stringformat && !(retval=PyString_FromString(stringformat)))
return NULL;
if (retval) {
if (args) {
PyObject *v;
v=PyString_Format(retval, args);
Py_DECREF(retval);
Py_DECREF(args);
if (! v) return NULL;
retval=v;
}
}
else
if (args) retval=args;
else {
PyErr_SetObject(ErrType,Py_None);
return NULL;
}
PyErr_SetObject(ErrType,retval);
Py_DECREF(retval);
return NULL;
}
static int
write_file(Picklerobject *self, const char *s, Py_ssize_t n)
{
size_t nbyteswritten;
if (s == NULL) {
return 0;
}
if (n > INT_MAX) {
/* String too large */
return -1;
}
Py_BEGIN_ALLOW_THREADS
nbyteswritten = fwrite(s, sizeof(char), n, self->fp);
Py_END_ALLOW_THREADS
if (nbyteswritten != (size_t)n) {
PyErr_SetFromErrno(PyExc_IOError);
return -1;
}
return (int)n;
}
static int
write_cStringIO(Picklerobject *self, const char *s, Py_ssize_t n)
{
if (s == NULL) {
return 0;
}
if (PycStringIO->cwrite((PyObject *)self->file, s, n) != n) {
return -1;
}
return (int)n;
}
static int
write_none(Picklerobject *self, const char *s, Py_ssize_t n)
{
if (s == NULL) return 0;
if (n > INT_MAX) return -1;
return (int)n;
}
static int
write_other(Picklerobject *self, const char *s, Py_ssize_t _n)
{
PyObject *py_str = 0, *junk = 0;
int n;
if (_n > INT_MAX)
return -1;
n = (int)_n;
if (s == NULL) {
if (!( self->buf_size )) return 0;
py_str = PyString_FromStringAndSize(self->write_buf,
self->buf_size);
if (!py_str)
return -1;
}
else {
if (self->buf_size && (n + self->buf_size) > WRITE_BUF_SIZE) {
if (write_other(self, NULL, 0) < 0)
return -1;
}
if (n > WRITE_BUF_SIZE) {
if (!( py_str =
PyString_FromStringAndSize(s, n)))
return -1;
}
else {
memcpy(self->write_buf + self->buf_size, s, n);
self->buf_size += n;
return n;
}
}
if (self->write) {
/* object with write method */
ARG_TUP(self, py_str);
if (self->arg) {
junk = PyObject_Call(self->write, self->arg, NULL);
FREE_ARG_TUP(self);
}
if (junk) Py_DECREF(junk);
else return -1;
}
else
PDATA_PUSH(self->file, py_str, -1);
self->buf_size = 0;
return n;
}
static Py_ssize_t
read_file(Unpicklerobject *self, char **s, Py_ssize_t n)
{
size_t nbytesread;
if (self->buf_size == 0) {
int size;
size = ((n < 32) ? 32 : n);
if (!( self->buf = (char *)malloc(size))) {
PyErr_NoMemory();
return -1;
}
self->buf_size = size;
}
else if (n > self->buf_size) {
self->buf = (char *)realloc(self->buf, n);
if (!self->buf) {
PyErr_NoMemory();
return -1;
}
self->buf_size = n;
}
Py_BEGIN_ALLOW_THREADS
nbytesread = fread(self->buf, sizeof(char), n, self->fp);
Py_END_ALLOW_THREADS
if (nbytesread != (size_t)n) {
if (feof(self->fp)) {
PyErr_SetNone(PyExc_EOFError);
return -1;
}
PyErr_SetFromErrno(PyExc_IOError);
return -1;
}
*s = self->buf;
return n;
}
static Py_ssize_t
readline_file(Unpicklerobject *self, char **s)
{
int i;
if (self->buf_size == 0) {
if (!( self->buf = (char *)malloc(40))) {
PyErr_NoMemory();
return -1;
}
self->buf_size = 40;
}
i = 0;
while (1) {
int bigger;
for (; i < (self->buf_size - 1); i++) {
if (feof(self->fp) ||
(self->buf[i] = getc(self->fp)) == '\n') {
self->buf[i + 1] = '\0';
*s = self->buf;
return i + 1;
}
}
bigger = self->buf_size << 1;
if (bigger <= 0) { /* overflow */
PyErr_NoMemory();
return -1;
}
self->buf = (char *)realloc(self->buf, bigger);
if (!self->buf) {
PyErr_NoMemory();
return -1;
}
self->buf_size = bigger;
}
}
static Py_ssize_t
read_cStringIO(Unpicklerobject *self, char **s, Py_ssize_t n)
{
char *ptr;
if (PycStringIO->cread((PyObject *)self->file, &ptr, n) != n) {
PyErr_SetNone(PyExc_EOFError);
return -1;
}
*s = ptr;
return n;
}
static Py_ssize_t
readline_cStringIO(Unpicklerobject *self, char **s)
{
Py_ssize_t n;
char *ptr;
if ((n = PycStringIO->creadline((PyObject *)self->file, &ptr)) < 0) {
return -1;
}
*s = ptr;
return n;
}
static Py_ssize_t
read_other(Unpicklerobject *self, char **s, Py_ssize_t n)
{
PyObject *bytes, *str=0;
if (!( bytes = PyInt_FromSsize_t(n))) return -1;
ARG_TUP(self, bytes);
if (self->arg) {
str = PyObject_Call(self->read, self->arg, NULL);
FREE_ARG_TUP(self);
}
if (! str) return -1;
Py_XDECREF(self->last_string);
self->last_string = str;
if (! (*s = PyString_AsString(str))) return -1;
return n;
}
static Py_ssize_t
readline_other(Unpicklerobject *self, char **s)
{
PyObject *str;
Py_ssize_t str_size;
if (!( str = PyObject_CallObject(self->readline, empty_tuple))) {
return -1;
}
if ((str_size = PyString_Size(str)) < 0)
return -1;
Py_XDECREF(self->last_string);
self->last_string = str;
if (! (*s = PyString_AsString(str)))
return -1;
return str_size;
}
/* Copy the first n bytes from s into newly malloc'ed memory, plus a
* trailing 0 byte. Return a pointer to that, or NULL if out of memory.
* The caller is responsible for free()'ing the return value.
*/
static char *
pystrndup(const char *s, int n)
{
char *r = (char *)malloc(n+1);
if (r == NULL)
return (char*)PyErr_NoMemory();
memcpy(r, s, n);
r[n] = 0;
return r;
}
static int
get(Picklerobject *self, PyObject *id)
{
PyObject *value, *mv;
long c_value;
char s[30];
size_t len;
if (!( mv = PyDict_GetItem(self->memo, id))) {
PyErr_SetObject(PyExc_KeyError, id);
return -1;
}
if (!( value = PyTuple_GetItem(mv, 0)))
return -1;
if (!( PyInt_Check(value))) {
PyErr_SetString(PicklingError, "no int where int expected in memo");
return -1;
}
c_value = PyInt_AS_LONG((PyIntObject*)value);
if (!self->bin) {
s[0] = GET;
PyOS_snprintf(s + 1, sizeof(s) - 1, "%ld\n", c_value);
len = strlen(s);
}
else if (Pdata_Check(self->file)) {
if (write_other(self, NULL, 0) < 0) return -1;
PDATA_APPEND(self->file, mv, -1);
return 0;
}
else {
if (c_value < 256) {
s[0] = BINGET;
s[1] = (int)(c_value & 0xff);
len = 2;
}
else {
s[0] = LONG_BINGET;
s[1] = (int)(c_value & 0xff);
s[2] = (int)((c_value >> 8) & 0xff);
s[3] = (int)((c_value >> 16) & 0xff);
s[4] = (int)((c_value >> 24) & 0xff);
len = 5;
}
}
if (self->write_func(self, s, len) < 0)
return -1;
return 0;
}
static int
put(Picklerobject *self, PyObject *ob)
{
if (ob->ob_refcnt < 2 || self->fast)
return 0;
return put2(self, ob);
}
static int
put2(Picklerobject *self, PyObject *ob)
{
char c_str[30];
int p;
size_t len;
int res = -1;
PyObject *py_ob_id = 0, *memo_len = 0, *t = 0;
if (self->fast)
return 0;
if ((p = PyDict_Size(self->memo)) < 0)
goto finally;
/* Make sure memo keys are positive! */
/* XXX Why?
* XXX And does "positive" really mean non-negative?
* XXX pickle.py starts with PUT index 0, not 1. This makes for
* XXX gratuitous differences between the pickling modules.
*/
p++;
if (!( py_ob_id = PyLong_FromVoidPtr(ob)))
goto finally;
if (!( memo_len = PyInt_FromLong(p)))
goto finally;
if (!( t = PyTuple_New(2)))
goto finally;
PyTuple_SET_ITEM(t, 0, memo_len);
Py_INCREF(memo_len);
PyTuple_SET_ITEM(t, 1, ob);
Py_INCREF(ob);
if (PyDict_SetItem(self->memo, py_ob_id, t) < 0)
goto finally;
if (!self->bin) {
c_str[0] = PUT;
PyOS_snprintf(c_str + 1, sizeof(c_str) - 1, "%d\n", p);
len = strlen(c_str);
}
else if (Pdata_Check(self->file)) {
if (write_other(self, NULL, 0) < 0) return -1;
PDATA_APPEND(self->file, memo_len, -1);
res=0; /* Job well done ;) */
goto finally;
}
else {
if (p >= 256) {
c_str[0] = LONG_BINPUT;
c_str[1] = (int)(p & 0xff);
c_str[2] = (int)((p >> 8) & 0xff);
c_str[3] = (int)((p >> 16) & 0xff);
c_str[4] = (int)((p >> 24) & 0xff);
len = 5;
}
else {
c_str[0] = BINPUT;
c_str[1] = p;
len = 2;
}
}
if (self->write_func(self, c_str, len) < 0)
goto finally;
res = 0;
finally:
Py_XDECREF(py_ob_id);
Py_XDECREF(memo_len);
Py_XDECREF(t);
return res;
}
static PyObject *
whichmodule(PyObject *global, PyObject *global_name)
{
Py_ssize_t i, j;
PyObject *module = 0, *modules_dict = 0,
*global_name_attr = 0, *name = 0;
module = PyObject_GetAttrString(global, "__module__");
if (module)
return module;
if (PyErr_ExceptionMatches(PyExc_AttributeError))
PyErr_Clear();
else
return NULL;
if (!( modules_dict = PySys_GetObject("modules")))
return NULL;
i = 0;
while ((j = PyDict_Next(modules_dict, &i, &name, &module))) {
if (PyObject_Compare(name, __main___str)==0) continue;
global_name_attr = PyObject_GetAttr(module, global_name);
if (!global_name_attr) {
if (PyErr_ExceptionMatches(PyExc_AttributeError))
PyErr_Clear();
else
return NULL;
continue;
}
if (global_name_attr != global) {
Py_DECREF(global_name_attr);
continue;
}
Py_DECREF(global_name_attr);
break;
}
/* The following implements the rule in pickle.py added in 1.5
that used __main__ if no module is found. I don't actually
like this rule. jlf
*/
if (!j) {
j=1;
name=__main___str;
}
Py_INCREF(name);
return name;
}
static int
fast_save_enter(Picklerobject *self, PyObject *obj)
{
/* if fast_container < 0, we're doing an error exit. */
if (++self->fast_container >= PY_CPICKLE_FAST_LIMIT) {
PyObject *key = NULL;
if (self->fast_memo == NULL) {
self->fast_memo = PyDict_New();
if (self->fast_memo == NULL) {
self->fast_container = -1;
return 0;
}
}
key = PyLong_FromVoidPtr(obj);
if (key == NULL)
return 0;
if (PyDict_GetItem(self->fast_memo, key)) {
Py_DECREF(key);
PyErr_Format(PyExc_ValueError,
"fast mode: can't pickle cyclic objects "
"including object type %s at %p",
obj->ob_type->tp_name, obj);
self->fast_container = -1;
return 0;
}
if (PyDict_SetItem(self->fast_memo, key, Py_None) < 0) {
Py_DECREF(key);
self->fast_container = -1;
return 0;
}
Py_DECREF(key);
}
return 1;
}
int
fast_save_leave(Picklerobject *self, PyObject *obj)
{
if (self->fast_container-- >= PY_CPICKLE_FAST_LIMIT) {
PyObject *key = PyLong_FromVoidPtr(obj);
if (key == NULL)
return 0;
if (PyDict_DelItem(self->fast_memo, key) < 0) {
Py_DECREF(key);
return 0;
}
Py_DECREF(key);
}
return 1;
}
static int
save_none(Picklerobject *self, PyObject *args)
{
static char none = NONE;
if (self->write_func(self, &none, 1) < 0)
return -1;
return 0;
}
static int
save_bool(Picklerobject *self, PyObject *args)
{
static const char *buf[2] = {FALSE, TRUE};
static char len[2] = {sizeof(FALSE)-1, sizeof(TRUE)-1};
long l = PyInt_AS_LONG((PyIntObject *)args);
if (self->proto >= 2) {
char opcode = l ? NEWTRUE : NEWFALSE;
if (self->write_func(self, &opcode, 1) < 0)
return -1;
}
else if (self->write_func(self, buf[l], len[l]) < 0)
return -1;
return 0;
}
static int
save_int(Picklerobject *self, PyObject *args)
{
char c_str[32];
long l = PyInt_AS_LONG((PyIntObject *)args);
int len = 0;
if (!self->bin
#if SIZEOF_LONG > 4
|| l > 0x7fffffffL
|| l < -0x80000000L
#endif
) {
/* Text-mode pickle, or long too big to fit in the 4-byte
* signed BININT format: store as a string.
*/
c_str[0] = INT;
PyOS_snprintf(c_str + 1, sizeof(c_str) - 1, "%ld\n", l);
if (self->write_func(self, c_str, strlen(c_str)) < 0)
return -1;
}
else {
/* Binary pickle and l fits in a signed 4-byte int. */
c_str[1] = (int)( l & 0xff);
c_str[2] = (int)((l >> 8) & 0xff);
c_str[3] = (int)((l >> 16) & 0xff);
c_str[4] = (int)((l >> 24) & 0xff);