add hg and python

cinap_lenrek committed 15 years ago

Commit 4bb9e221 parent 987265c3706 files · +1228772 −-233Browse files

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sys/src/cmd/python/Modules/_struct.c+1896−0

@@ -0,0 +1,1896 @@
	1	+/* struct module -- pack values into and (out of) strings */
	2	+
	3	+/* New version supporting byte order, alignment and size options,
	4	+ character strings, and unsigned numbers */
	5	+
	6	+#define PY_SSIZE_T_CLEAN
	7	+
	8	+#include "Python.h"
	9	+#include "structseq.h"
	10	+#include "structmember.h"
	11	+#include <ctype.h>
	12	+
	13	+static PyTypeObject PyStructType;
	14	+
	15	+/* compatibility macros */
	16	+#if (PY_VERSION_HEX < 0x02050000)
	17	+typedef int Py_ssize_t;
	18	+#endif
	19	+
	20	+/* If PY_STRUCT_OVERFLOW_MASKING is defined, the struct module will wrap all input
	21	+ numbers for explicit endians such that they fit in the given type, much
	22	+ like explicit casting in C. A warning will be raised if the number did
	23	+ not originally fit within the range of the requested type. If it is
	24	+ not defined, then all range errors and overflow will be struct.error
	25	+ exceptions. */
	26	+
	27	+#define PY_STRUCT_OVERFLOW_MASKING 1
	28	+
	29	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	30	+static PyObject *pylong_ulong_mask = NULL;
	31	+static PyObject *pyint_zero = NULL;
	32	+#endif
	33	+
	34	+/* If PY_STRUCT_FLOAT_COERCE is defined, the struct module will allow float
	35	+ arguments for integer formats with a warning for backwards
	36	+ compatibility. */
	37	+
	38	+#define PY_STRUCT_FLOAT_COERCE 1
	39	+
	40	+#ifdef PY_STRUCT_FLOAT_COERCE
	41	+#define FLOAT_COERCE "integer argument expected, got float"
	42	+#endif
	43	+
	44	+
	45	+/* The translation function for each format character is table driven */
	46	+typedef struct _formatdef {
	47	+ char format;
	48	+ Py_ssize_t size;
	49	+ Py_ssize_t alignment;
	50	+ PyObject* (unpack)(const char ,
	51	+ const struct _formatdef *);
	52	+ int (pack)(char , PyObject *,
	53	+ const struct _formatdef *);
	54	+} formatdef;
	55	+
	56	+typedef struct _formatcode {
	57	+ const struct _formatdef *fmtdef;
	58	+ Py_ssize_t offset;
	59	+ Py_ssize_t size;
	60	+} formatcode;
	61	+
	62	+/* Struct object interface */
	63	+
	64	+typedef struct {
	65	+ PyObject_HEAD
	66	+ Py_ssize_t s_size;
	67	+ Py_ssize_t s_len;
	68	+ formatcode *s_codes;
	69	+ PyObject *s_format;
	70	+ PyObject weakreflist; / List of weak references */
	71	+} PyStructObject;
	72	+
	73	+
	74	+#define PyStruct_Check(op) PyObject_TypeCheck(op, &PyStructType)
	75	+#define PyStruct_CheckExact(op) ((op)->ob_type == &PyStructType)
	76	+
	77	+
	78	+/* Exception */
	79	+
	80	+static PyObject *StructError;
	81	+
	82	+
	83	+/* Define various structs to figure out the alignments of types */
	84	+
	85	+
	86	+typedef struct { char c; short x; } st_short;
	87	+typedef struct { char c; int x; } st_int;
	88	+typedef struct { char c; long x; } st_long;
	89	+typedef struct { char c; float x; } st_float;
	90	+typedef struct { char c; double x; } st_double;
	91	+typedef struct { char c; void *x; } st_void_p;
	92	+
	93	+#define SHORT_ALIGN (sizeof(st_short) - sizeof(short))
	94	+#define INT_ALIGN (sizeof(st_int) - sizeof(int))
	95	+#define LONG_ALIGN (sizeof(st_long) - sizeof(long))
	96	+#define FLOAT_ALIGN (sizeof(st_float) - sizeof(float))
	97	+#define DOUBLE_ALIGN (sizeof(st_double) - sizeof(double))
	98	+#define VOID_P_ALIGN (sizeof(st_void_p) - sizeof(void *))
	99	+
	100	+/* We can't support q and Q in native mode unless the compiler does;
	101	+ in std mode, they're 8 bytes on all platforms. */
	102	+#ifdef HAVE_LONG_LONG
	103	+typedef struct { char c; PY_LONG_LONG x; } s_long_long;
	104	+#define LONG_LONG_ALIGN (sizeof(s_long_long) - sizeof(PY_LONG_LONG))
	105	+#endif
	106	+
	107	+#define STRINGIFY(x) #x
	108	+
	109	+#ifdef __powerc
	110	+#pragma options align=reset
	111	+#endif
	112	+
	113	+/* Helper to get a PyLongObject by hook or by crook. Caller should decref. */
	114	+
	115	+static PyObject *
	116	+get_pylong(PyObject *v)
	117	+{
	118	+ PyNumberMethods *m;
	119	+
	120	+ assert(v != NULL);
	121	+ if (PyInt_Check(v))
	122	+ return PyLong_FromLong(PyInt_AS_LONG(v));
	123	+ if (PyLong_Check(v)) {
	124	+ Py_INCREF(v);
	125	+ return v;
	126	+ }
	127	+ m = v->ob_type->tp_as_number;
	128	+ if (m != NULL && m->nb_long != NULL) {
	129	+ v = m->nb_long(v);
	130	+ if (v == NULL)
	131	+ return NULL;
	132	+ if (PyLong_Check(v))
	133	+ return v;
	134	+ Py_DECREF(v);
	135	+ }
	136	+ PyErr_SetString(StructError,
	137	+ "cannot convert argument to long");
	138	+ return NULL;
	139	+}
	140	+
	141	+/* Helper routine to get a Python integer and raise the appropriate error
	142	+ if it isn't one */
	143	+
	144	+static int
	145	+get_long(PyObject v, long p)
	146	+{
	147	+ long x = PyInt_AsLong(v);
	148	+ if (x == -1 && PyErr_Occurred()) {
	149	+#ifdef PY_STRUCT_FLOAT_COERCE
	150	+ if (PyFloat_Check(v)) {
	151	+ PyObject *o;
	152	+ int res;
	153	+ PyErr_Clear();
	154	+ if (PyErr_WarnEx(PyExc_DeprecationWarning, FLOAT_COERCE, 2) < 0)
	155	+ return -1;
	156	+ o = PyNumber_Int(v);
	157	+ if (o == NULL)
	158	+ return -1;
	159	+ res = get_long(o, p);
	160	+ Py_DECREF(o);
	161	+ return res;
	162	+ }
	163	+#endif
	164	+ if (PyErr_ExceptionMatches(PyExc_TypeError))
	165	+ PyErr_SetString(StructError,
	166	+ "required argument is not an integer");
	167	+ return -1;
	168	+ }
	169	+ *p = x;
	170	+ return 0;
	171	+}
	172	+
	173	+
	174	+/* Same, but handling unsigned long */
	175	+
	176	+static int
	177	+get_ulong(PyObject v, unsigned long p)
	178	+{
	179	+ if (PyLong_Check(v)) {
	180	+ unsigned long x = PyLong_AsUnsignedLong(v);
	181	+ if (x == (unsigned long)(-1) && PyErr_Occurred())
	182	+ return -1;
	183	+ *p = x;
	184	+ return 0;
	185	+ }
	186	+ if (get_long(v, (long *)p) < 0)
	187	+ return -1;
	188	+ if (((long)*p) < 0) {
	189	+ PyErr_SetString(StructError,
	190	+ "unsigned argument is < 0");
	191	+ return -1;
	192	+ }
	193	+ return 0;
	194	+}
	195	+
	196	+#ifdef HAVE_LONG_LONG
	197	+
	198	+/* Same, but handling native long long. */
	199	+
	200	+static int
	201	+get_longlong(PyObject v, PY_LONG_LONG p)
	202	+{
	203	+ PY_LONG_LONG x;
	204	+
	205	+ v = get_pylong(v);
	206	+ if (v == NULL)
	207	+ return -1;
	208	+ assert(PyLong_Check(v));
	209	+ x = PyLong_AsLongLong(v);
	210	+ Py_DECREF(v);
	211	+ if (x == (PY_LONG_LONG)-1 && PyErr_Occurred())
	212	+ return -1;
	213	+ *p = x;
	214	+ return 0;
	215	+}
	216	+
	217	+/* Same, but handling native unsigned long long. */
	218	+
	219	+static int
	220	+get_ulonglong(PyObject v, unsigned PY_LONG_LONG p)
	221	+{
	222	+ unsigned PY_LONG_LONG x;
	223	+
	224	+ v = get_pylong(v);
	225	+ if (v == NULL)
	226	+ return -1;
	227	+ assert(PyLong_Check(v));
	228	+ x = PyLong_AsUnsignedLongLong(v);
	229	+ Py_DECREF(v);
	230	+ if (x == (unsigned PY_LONG_LONG)-1 && PyErr_Occurred())
	231	+ return -1;
	232	+ *p = x;
	233	+ return 0;
	234	+}
	235	+
	236	+#endif
	237	+
	238	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	239	+
	240	+/* Helper routine to get a Python integer and raise the appropriate error
	241	+ if it isn't one */
	242	+
	243	+#define INT_OVERFLOW "struct integer overflow masking is deprecated"
	244	+
	245	+static int
	246	+get_wrapped_long(PyObject v, long p)
	247	+{
	248	+ if (get_long(v, p) < 0) {
	249	+ if (PyLong_Check(v) &&
	250	+ PyErr_ExceptionMatches(PyExc_OverflowError)) {
	251	+ PyObject *wrapped;
	252	+ long x;
	253	+ PyErr_Clear();
	254	+#ifdef PY_STRUCT_FLOAT_COERCE
	255	+ if (PyFloat_Check(v)) {
	256	+ PyObject *o;
	257	+ int res;
	258	+ PyErr_Clear();
	259	+ if (PyErr_WarnEx(PyExc_DeprecationWarning, FLOAT_COERCE, 2) < 0)
	260	+ return -1;
	261	+ o = PyNumber_Int(v);
	262	+ if (o == NULL)
	263	+ return -1;
	264	+ res = get_wrapped_long(o, p);
	265	+ Py_DECREF(o);
	266	+ return res;
	267	+ }
	268	+#endif
	269	+ if (PyErr_WarnEx(PyExc_DeprecationWarning, INT_OVERFLOW, 2) < 0)
	270	+ return -1;
	271	+ wrapped = PyNumber_And(v, pylong_ulong_mask);
	272	+ if (wrapped == NULL)
	273	+ return -1;
	274	+ x = (long)PyLong_AsUnsignedLong(wrapped);
	275	+ Py_DECREF(wrapped);
	276	+ if (x == -1 && PyErr_Occurred())
	277	+ return -1;
	278	+ *p = x;
	279	+ } else {
	280	+ return -1;
	281	+ }
	282	+ }
	283	+ return 0;
	284	+}
	285	+
	286	+static int
	287	+get_wrapped_ulong(PyObject v, unsigned long p)
	288	+{
	289	+ long x = (long)PyLong_AsUnsignedLong(v);
	290	+ if (x == -1 && PyErr_Occurred()) {
	291	+ PyObject *wrapped;
	292	+ PyErr_Clear();
	293	+#ifdef PY_STRUCT_FLOAT_COERCE
	294	+ if (PyFloat_Check(v)) {
	295	+ PyObject *o;
	296	+ int res;
	297	+ PyErr_Clear();
	298	+ if (PyErr_WarnEx(PyExc_DeprecationWarning, FLOAT_COERCE, 2) < 0)
	299	+ return -1;
	300	+ o = PyNumber_Int(v);
	301	+ if (o == NULL)
	302	+ return -1;
	303	+ res = get_wrapped_ulong(o, p);
	304	+ Py_DECREF(o);
	305	+ return res;
	306	+ }
	307	+#endif
	308	+ wrapped = PyNumber_And(v, pylong_ulong_mask);
	309	+ if (wrapped == NULL)
	310	+ return -1;
	311	+ if (PyErr_WarnEx(PyExc_DeprecationWarning, INT_OVERFLOW, 2) < 0) {
	312	+ Py_DECREF(wrapped);
	313	+ return -1;
	314	+ }
	315	+ x = (long)PyLong_AsUnsignedLong(wrapped);
	316	+ Py_DECREF(wrapped);
	317	+ if (x == -1 && PyErr_Occurred())
	318	+ return -1;
	319	+ }
	320	+ *p = (unsigned long)x;
	321	+ return 0;
	322	+}
	323	+
	324	+#define RANGE_ERROR(x, f, flag, mask) \
	325	+ do { \
	326	+ if (_range_error(f, flag) < 0) \
	327	+ return -1; \
	328	+ else \
	329	+ (x) &= (mask); \
	330	+ } while (0)
	331	+
	332	+#else
	333	+
	334	+#define get_wrapped_long get_long
	335	+#define get_wrapped_ulong get_ulong
	336	+#define RANGE_ERROR(x, f, flag, mask) return _range_error(f, flag)
	337	+
	338	+#endif
	339	+
	340	+/* Floating point helpers */
	341	+
	342	+static PyObject *
	343	+unpack_float(const char p, / start of 4-byte string */
	344	+ int le) /* true for little-endian, false for big-endian */
	345	+{
	346	+ double x;
	347	+
	348	+ x = _PyFloat_Unpack4((unsigned char *)p, le);
	349	+ if (x == -1.0 && PyErr_Occurred())
	350	+ return NULL;
	351	+ return PyFloat_FromDouble(x);
	352	+}
	353	+
	354	+static PyObject *
	355	+unpack_double(const char p, / start of 8-byte string */
	356	+ int le) /* true for little-endian, false for big-endian */
	357	+{
	358	+ double x;
	359	+
	360	+ x = _PyFloat_Unpack8((unsigned char *)p, le);
	361	+ if (x == -1.0 && PyErr_Occurred())
	362	+ return NULL;
	363	+ return PyFloat_FromDouble(x);
	364	+}
	365	+
	366	+/* Helper to format the range error exceptions */
	367	+static int
	368	+_range_error(const formatdef *f, int is_unsigned)
	369	+{
	370	+ /* ulargest is the largest unsigned value with f->size bytes.
	371	+ * Note that the simpler:
	372	+ * ((size_t)1 << (f->size * 8)) - 1
	373	+ * doesn't work when f->size == sizeof(size_t) because C doesn't
	374	+ * define what happens when a left shift count is >= the number of
	375	+ * bits in the integer being shifted; e.g., on some boxes it doesn't
	376	+ * shift at all when they're equal.
	377	+ */
	378	+ const size_t ulargest = (size_t)-1 >> ((SIZEOF_SIZE_T - f->size)*8);
	379	+ assert(f->size >= 1 && f->size <= SIZEOF_SIZE_T);
	380	+ if (is_unsigned)
	381	+ PyErr_Format(StructError,
	382	+ "'%c' format requires 0 <= number <= %zu",
	383	+ f->format,
	384	+ ulargest);
	385	+ else {
	386	+ const Py_ssize_t largest = (Py_ssize_t)(ulargest >> 1);
	387	+ PyErr_Format(StructError,
	388	+ "'%c' format requires %zd <= number <= %zd",
	389	+ f->format,
	390	+ ~ largest,
	391	+ largest);
	392	+ }
	393	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	394	+ {
	395	+ PyObject ptype, pvalue, *ptraceback;
	396	+ PyObject *msg;
	397	+ int rval;
	398	+ PyErr_Fetch(&ptype, &pvalue, &ptraceback);
	399	+ assert(pvalue != NULL);
	400	+ msg = PyObject_Str(pvalue);
	401	+ Py_XDECREF(ptype);
	402	+ Py_XDECREF(pvalue);
	403	+ Py_XDECREF(ptraceback);
	404	+ if (msg == NULL)
	405	+ return -1;
	406	+ rval = PyErr_WarnEx(PyExc_DeprecationWarning,
	407	+ PyString_AS_STRING(msg), 2);
	408	+ Py_DECREF(msg);
	409	+ if (rval == 0)
	410	+ return 0;
	411	+ }
	412	+#endif
	413	+ return -1;
	414	+}
	415	+
	416	+
	417	+
	418	+/* A large number of small routines follow, with names of the form
	419	+
	420	+ [bln][up]_TYPE
	421	+
	422	+ [bln] distiguishes among big-endian, little-endian and native.
	423	+ [pu] distiguishes between pack (to struct) and unpack (from struct).
	424	+ TYPE is one of char, byte, ubyte, etc.
	425	+*/
	426	+
	427	+/* Native mode routines. ****************************************************/
	428	+/* NOTE:
	429	+ In all n[up]_<type> routines handling types larger than 1 byte, there is
	430	+ no guarantee that the p pointer is properly aligned for each type,
	431	+ therefore memcpy is called. An intermediate variable is used to
	432	+ compensate for big-endian architectures.
	433	+ Normally both the intermediate variable and the memcpy call will be
	434	+ skipped by C optimisation in little-endian architectures (gcc >= 2.91
	435	+ does this). */
	436	+
	437	+static PyObject *
	438	+nu_char(const char p, const formatdef f)
	439	+{
	440	+ return PyString_FromStringAndSize(p, 1);
	441	+}
	442	+
	443	+static PyObject *
	444	+nu_byte(const char p, const formatdef f)
	445	+{
	446	+ return PyInt_FromLong((long) (signed char )p);
	447	+}
	448	+
	449	+static PyObject *
	450	+nu_ubyte(const char p, const formatdef f)
	451	+{
	452	+ return PyInt_FromLong((long) (unsigned char )p);
	453	+}
	454	+
	455	+static PyObject *
	456	+nu_short(const char p, const formatdef f)
	457	+{
	458	+ short x;
	459	+ memcpy((char *)&x, p, sizeof x);
	460	+ return PyInt_FromLong((long)x);
	461	+}
	462	+
	463	+static PyObject *
	464	+nu_ushort(const char p, const formatdef f)
	465	+{
	466	+ unsigned short x;
	467	+ memcpy((char *)&x, p, sizeof x);
	468	+ return PyInt_FromLong((long)x);
	469	+}
	470	+
	471	+static PyObject *
	472	+nu_int(const char p, const formatdef f)
	473	+{
	474	+ int x;
	475	+ memcpy((char *)&x, p, sizeof x);
	476	+ return PyInt_FromLong((long)x);
	477	+}
	478	+
	479	+static PyObject *
	480	+nu_uint(const char p, const formatdef f)
	481	+{
	482	+ unsigned int x;
	483	+ memcpy((char *)&x, p, sizeof x);
	484	+#if (SIZEOF_LONG > SIZEOF_INT)
	485	+ return PyInt_FromLong((long)x);
	486	+#else
	487	+ if (x <= ((unsigned int)LONG_MAX))
	488	+ return PyInt_FromLong((long)x);
	489	+ return PyLong_FromUnsignedLong((unsigned long)x);
	490	+#endif
	491	+}
	492	+
	493	+static PyObject *
	494	+nu_long(const char p, const formatdef f)
	495	+{
	496	+ long x;
	497	+ memcpy((char *)&x, p, sizeof x);
	498	+ return PyInt_FromLong(x);
	499	+}
	500	+
	501	+static PyObject *
	502	+nu_ulong(const char p, const formatdef f)
	503	+{
	504	+ unsigned long x;
	505	+ memcpy((char *)&x, p, sizeof x);
	506	+ if (x <= LONG_MAX)
	507	+ return PyInt_FromLong((long)x);
	508	+ return PyLong_FromUnsignedLong(x);
	509	+}
	510	+
	511	+/* Native mode doesn't support q or Q unless the platform C supports
	512	+ long long (or, on Windows, __int64). */
	513	+
	514	+#ifdef HAVE_LONG_LONG
	515	+
	516	+static PyObject *
	517	+nu_longlong(const char p, const formatdef f)
	518	+{
	519	+ PY_LONG_LONG x;
	520	+ memcpy((char *)&x, p, sizeof x);
	521	+ if (x >= LONG_MIN && x <= LONG_MAX)
	522	+ return PyInt_FromLong(Py_SAFE_DOWNCAST(x, PY_LONG_LONG, long));
	523	+ return PyLong_FromLongLong(x);
	524	+}
	525	+
	526	+static PyObject *
	527	+nu_ulonglong(const char p, const formatdef f)
	528	+{
	529	+ unsigned PY_LONG_LONG x;
	530	+ memcpy((char *)&x, p, sizeof x);
	531	+ if (x <= LONG_MAX)
	532	+ return PyInt_FromLong(Py_SAFE_DOWNCAST(x, unsigned PY_LONG_LONG, long));
	533	+ return PyLong_FromUnsignedLongLong(x);
	534	+}
	535	+
	536	+#endif
	537	+
	538	+static PyObject *
	539	+nu_float(const char p, const formatdef f)
	540	+{
	541	+ float x;
	542	+ memcpy((char *)&x, p, sizeof x);
	543	+ return PyFloat_FromDouble((double)x);
	544	+}
	545	+
	546	+static PyObject *
	547	+nu_double(const char p, const formatdef f)
	548	+{
	549	+ double x;
	550	+ memcpy((char *)&x, p, sizeof x);
	551	+ return PyFloat_FromDouble(x);
	552	+}
	553	+
	554	+static PyObject *
	555	+nu_void_p(const char p, const formatdef f)
	556	+{
	557	+ void *x;
	558	+ memcpy((char *)&x, p, sizeof x);
	559	+ return PyLong_FromVoidPtr(x);
	560	+}
	561	+
	562	+static int
	563	+np_byte(char p, PyObject v, const formatdef *f)
	564	+{
	565	+ long x;
	566	+ if (get_long(v, &x) < 0)
	567	+ return -1;
	568	+ if (x < -128 \|\| x > 127){
	569	+ PyErr_SetString(StructError,
	570	+ "byte format requires -128 <= number <= 127");
	571	+ return -1;
	572	+ }
	573	+ *p = (char)x;
	574	+ return 0;
	575	+}
	576	+
	577	+static int
	578	+np_ubyte(char p, PyObject v, const formatdef *f)
	579	+{
	580	+ long x;
	581	+ if (get_long(v, &x) < 0)
	582	+ return -1;
	583	+ if (x < 0 \|\| x > 255){
	584	+ PyErr_SetString(StructError,
	585	+ "ubyte format requires 0 <= number <= 255");
	586	+ return -1;
	587	+ }
	588	+ *p = (char)x;
	589	+ return 0;
	590	+}
	591	+
	592	+static int
	593	+np_char(char p, PyObject v, const formatdef *f)
	594	+{
	595	+ if (!PyString_Check(v) \|\| PyString_Size(v) != 1) {
	596	+ PyErr_SetString(StructError,
	597	+ "char format require string of length 1");
	598	+ return -1;
	599	+ }
	600	+ p = PyString_AsString(v);
	601	+ return 0;
	602	+}
	603	+
	604	+static int
	605	+np_short(char p, PyObject v, const formatdef *f)
	606	+{
	607	+ long x;
	608	+ short y;
	609	+ if (get_long(v, &x) < 0)
	610	+ return -1;
	611	+ if (x < SHRT_MIN \|\| x > SHRT_MAX){
	612	+ PyErr_SetString(StructError,
	613	+ "short format requires " STRINGIFY(SHRT_MIN)
	614	+ " <= number <= " STRINGIFY(SHRT_MAX));
	615	+ return -1;
	616	+ }
	617	+ y = (short)x;
	618	+ memcpy(p, (char *)&y, sizeof y);
	619	+ return 0;
	620	+}
	621	+
	622	+static int
	623	+np_ushort(char p, PyObject v, const formatdef *f)
	624	+{
	625	+ long x;
	626	+ unsigned short y;
	627	+ if (get_long(v, &x) < 0)
	628	+ return -1;
	629	+ if (x < 0 \|\| x > USHRT_MAX){
	630	+ PyErr_SetString(StructError,
	631	+ "short format requires 0 <= number <= " STRINGIFY(USHRT_MAX));
	632	+ return -1;
	633	+ }
	634	+ y = (unsigned short)x;
	635	+ memcpy(p, (char *)&y, sizeof y);
	636	+ return 0;
	637	+}
	638	+
	639	+static int
	640	+np_int(char p, PyObject v, const formatdef *f)
	641	+{
	642	+ long x;
	643	+ int y;
	644	+ if (get_long(v, &x) < 0)
	645	+ return -1;
	646	+#if (SIZEOF_LONG > SIZEOF_INT)
	647	+ if ((x < ((long)INT_MIN)) \|\| (x > ((long)INT_MAX)))
	648	+ return _range_error(f, 0);
	649	+#endif
	650	+ y = (int)x;
	651	+ memcpy(p, (char *)&y, sizeof y);
	652	+ return 0;
	653	+}
	654	+
	655	+static int
	656	+np_uint(char p, PyObject v, const formatdef *f)
	657	+{
	658	+ unsigned long x;
	659	+ unsigned int y;
	660	+ if (get_ulong(v, &x) < 0)
	661	+ return _range_error(f, 1);
	662	+ y = (unsigned int)x;
	663	+#if (SIZEOF_LONG > SIZEOF_INT)
	664	+ if (x > ((unsigned long)UINT_MAX))
	665	+ return _range_error(f, 1);
	666	+#endif
	667	+ memcpy(p, (char *)&y, sizeof y);
	668	+ return 0;
	669	+}
	670	+
	671	+static int
	672	+np_long(char p, PyObject v, const formatdef *f)
	673	+{
	674	+ long x;
	675	+ if (get_long(v, &x) < 0)
	676	+ return -1;
	677	+ memcpy(p, (char *)&x, sizeof x);
	678	+ return 0;
	679	+}
	680	+
	681	+static int
	682	+np_ulong(char p, PyObject v, const formatdef *f)
	683	+{
	684	+ unsigned long x;
	685	+ if (get_ulong(v, &x) < 0)
	686	+ return _range_error(f, 1);
	687	+ memcpy(p, (char *)&x, sizeof x);
	688	+ return 0;
	689	+}
	690	+
	691	+#ifdef HAVE_LONG_LONG
	692	+
	693	+static int
	694	+np_longlong(char p, PyObject v, const formatdef *f)
	695	+{
	696	+ PY_LONG_LONG x;
	697	+ if (get_longlong(v, &x) < 0)
	698	+ return -1;
	699	+ memcpy(p, (char *)&x, sizeof x);
	700	+ return 0;
	701	+}
	702	+
	703	+static int
	704	+np_ulonglong(char p, PyObject v, const formatdef *f)
	705	+{
	706	+ unsigned PY_LONG_LONG x;
	707	+ if (get_ulonglong(v, &x) < 0)
	708	+ return -1;
	709	+ memcpy(p, (char *)&x, sizeof x);
	710	+ return 0;
	711	+}
	712	+#endif
	713	+
	714	+static int
	715	+np_float(char p, PyObject v, const formatdef *f)
	716	+{
	717	+ float x = (float)PyFloat_AsDouble(v);
	718	+ if (x == -1 && PyErr_Occurred()) {
	719	+ PyErr_SetString(StructError,
	720	+ "required argument is not a float");
	721	+ return -1;
	722	+ }
	723	+ memcpy(p, (char *)&x, sizeof x);
	724	+ return 0;
	725	+}
	726	+
	727	+static int
	728	+np_double(char p, PyObject v, const formatdef *f)
	729	+{
	730	+ double x = PyFloat_AsDouble(v);
	731	+ if (x == -1 && PyErr_Occurred()) {
	732	+ PyErr_SetString(StructError,
	733	+ "required argument is not a float");
	734	+ return -1;
	735	+ }
	736	+ memcpy(p, (char *)&x, sizeof(double));
	737	+ return 0;
	738	+}
	739	+
	740	+static int
	741	+np_void_p(char p, PyObject v, const formatdef *f)
	742	+{
	743	+ void *x;
	744	+
	745	+ v = get_pylong(v);
	746	+ if (v == NULL)
	747	+ return -1;
	748	+ assert(PyLong_Check(v));
	749	+ x = PyLong_AsVoidPtr(v);
	750	+ Py_DECREF(v);
	751	+ if (x == NULL && PyErr_Occurred())
	752	+ return -1;
	753	+ memcpy(p, (char *)&x, sizeof x);
	754	+ return 0;
	755	+}
	756	+
	757	+static formatdef native_table[] = {
	758	+ {'x', sizeof(char), 0, NULL},
	759	+ {'b', sizeof(char), 0, nu_byte, np_byte},
	760	+ {'B', sizeof(char), 0, nu_ubyte, np_ubyte},
	761	+ {'c', sizeof(char), 0, nu_char, np_char},
	762	+ {'s', sizeof(char), 0, NULL},
	763	+ {'p', sizeof(char), 0, NULL},
	764	+ {'h', sizeof(short), SHORT_ALIGN, nu_short, np_short},
	765	+ {'H', sizeof(short), SHORT_ALIGN, nu_ushort, np_ushort},
	766	+ {'i', sizeof(int), INT_ALIGN, nu_int, np_int},
	767	+ {'I', sizeof(int), INT_ALIGN, nu_uint, np_uint},
	768	+ {'l', sizeof(long), LONG_ALIGN, nu_long, np_long},
	769	+ {'L', sizeof(long), LONG_ALIGN, nu_ulong, np_ulong},
	770	+#ifdef HAVE_LONG_LONG
	771	+ {'q', sizeof(PY_LONG_LONG), LONG_LONG_ALIGN, nu_longlong, np_longlong},
	772	+ {'Q', sizeof(PY_LONG_LONG), LONG_LONG_ALIGN, nu_ulonglong,np_ulonglong},
	773	+#endif
	774	+ {'f', sizeof(float), FLOAT_ALIGN, nu_float, np_float},
	775	+ {'d', sizeof(double), DOUBLE_ALIGN, nu_double, np_double},
	776	+ {'P', sizeof(void *), VOID_P_ALIGN, nu_void_p, np_void_p},
	777	+ {0}
	778	+};
	779	+
	780	+/* Big-endian routines. *****************************************************/
	781	+
	782	+static PyObject *
	783	+bu_int(const char p, const formatdef f)
	784	+{
	785	+ long x = 0;
	786	+ Py_ssize_t i = f->size;
	787	+ const unsigned char bytes = (const unsigned char )p;
	788	+ do {
	789	+ x = (x<<8) \| *bytes++;
	790	+ } while (--i > 0);
	791	+ /* Extend the sign bit. */
	792	+ if (SIZEOF_LONG > f->size)
	793	+ x \|= -(x & (1L << ((8 * f->size) - 1)));
	794	+ return PyInt_FromLong(x);
	795	+}
	796	+
	797	+static PyObject *
	798	+bu_uint(const char p, const formatdef f)
	799	+{
	800	+ unsigned long x = 0;
	801	+ Py_ssize_t i = f->size;
	802	+ const unsigned char bytes = (const unsigned char )p;
	803	+ do {
	804	+ x = (x<<8) \| *bytes++;
	805	+ } while (--i > 0);
	806	+ if (x <= LONG_MAX)
	807	+ return PyInt_FromLong((long)x);
	808	+ return PyLong_FromUnsignedLong(x);
	809	+}
	810	+
	811	+static PyObject *
	812	+bu_longlong(const char p, const formatdef f)
	813	+{
	814	+#ifdef HAVE_LONG_LONG
	815	+ PY_LONG_LONG x = 0;
	816	+ Py_ssize_t i = f->size;
	817	+ const unsigned char bytes = (const unsigned char )p;
	818	+ do {
	819	+ x = (x<<8) \| *bytes++;
	820	+ } while (--i > 0);
	821	+ /* Extend the sign bit. */
	822	+ if (SIZEOF_LONG_LONG > f->size)
	823	+ x \|= -(x & ( (PY_LONG_LONG)1 << ((8 * f->size) - 1)));
	824	+ if (x >= LONG_MIN && x <= LONG_MAX)
	825	+ return PyInt_FromLong(Py_SAFE_DOWNCAST(x, PY_LONG_LONG, long));
	826	+ return PyLong_FromLongLong(x);
	827	+#else
	828	+ return _PyLong_FromByteArray((const unsigned char *)p,
	829	+ 8,
	830	+ 0, /* little-endian */
	831	+ 1 /* signed */);
	832	+#endif
	833	+}
	834	+
	835	+static PyObject *
	836	+bu_ulonglong(const char p, const formatdef f)
	837	+{
	838	+#ifdef HAVE_LONG_LONG
	839	+ unsigned PY_LONG_LONG x = 0;
	840	+ Py_ssize_t i = f->size;
	841	+ const unsigned char bytes = (const unsigned char )p;
	842	+ do {
	843	+ x = (x<<8) \| *bytes++;
	844	+ } while (--i > 0);
	845	+ if (x <= LONG_MAX)
	846	+ return PyInt_FromLong(Py_SAFE_DOWNCAST(x, unsigned PY_LONG_LONG, long));
	847	+ return PyLong_FromUnsignedLongLong(x);
	848	+#else
	849	+ return _PyLong_FromByteArray((const unsigned char *)p,
	850	+ 8,
	851	+ 0, /* little-endian */
	852	+ 0 /* signed */);
	853	+#endif
	854	+}
	855	+
	856	+static PyObject *
	857	+bu_float(const char p, const formatdef f)
	858	+{
	859	+ return unpack_float(p, 0);
	860	+}
	861	+
	862	+static PyObject *
	863	+bu_double(const char p, const formatdef f)
	864	+{
	865	+ return unpack_double(p, 0);
	866	+}
	867	+
	868	+static int
	869	+bp_int(char p, PyObject v, const formatdef *f)
	870	+{
	871	+ long x;
	872	+ Py_ssize_t i;
	873	+ if (get_wrapped_long(v, &x) < 0)
	874	+ return -1;
	875	+ i = f->size;
	876	+ if (i != SIZEOF_LONG) {
	877	+ if ((i == 2) && (x < -32768 \|\| x > 32767))
	878	+ RANGE_ERROR(x, f, 0, 0xffffL);
	879	+#if (SIZEOF_LONG != 4)
	880	+ else if ((i == 4) && (x < -2147483648L \|\| x > 2147483647L))
	881	+ RANGE_ERROR(x, f, 0, 0xffffffffL);
	882	+#endif
	883	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	884	+ else if ((i == 1) && (x < -128 \|\| x > 127))
	885	+ RANGE_ERROR(x, f, 0, 0xffL);
	886	+#endif
	887	+ }
	888	+ do {
	889	+ p[--i] = (char)x;
	890	+ x >>= 8;
	891	+ } while (i > 0);
	892	+ return 0;
	893	+}
	894	+
	895	+static int
	896	+bp_uint(char p, PyObject v, const formatdef *f)
	897	+{
	898	+ unsigned long x;
	899	+ Py_ssize_t i;
	900	+ if (get_wrapped_ulong(v, &x) < 0)
	901	+ return -1;
	902	+ i = f->size;
	903	+ if (i != SIZEOF_LONG) {
	904	+ unsigned long maxint = 1;
	905	+ maxint <<= (unsigned long)(i * 8);
	906	+ if (x >= maxint)
	907	+ RANGE_ERROR(x, f, 1, maxint - 1);
	908	+ }
	909	+ do {
	910	+ p[--i] = (char)x;
	911	+ x >>= 8;
	912	+ } while (i > 0);
	913	+ return 0;
	914	+}
	915	+
	916	+static int
	917	+bp_longlong(char p, PyObject v, const formatdef *f)
	918	+{
	919	+ int res;
	920	+ v = get_pylong(v);
	921	+ if (v == NULL)
	922	+ return -1;
	923	+ res = _PyLong_AsByteArray((PyLongObject *)v,
	924	+ (unsigned char *)p,
	925	+ 8,
	926	+ 0, /* little_endian */
	927	+ 1 /* signed */);
	928	+ Py_DECREF(v);
	929	+ return res;
	930	+}
	931	+
	932	+static int
	933	+bp_ulonglong(char p, PyObject v, const formatdef *f)
	934	+{
	935	+ int res;
	936	+ v = get_pylong(v);
	937	+ if (v == NULL)
	938	+ return -1;
	939	+ res = _PyLong_AsByteArray((PyLongObject *)v,
	940	+ (unsigned char *)p,
	941	+ 8,
	942	+ 0, /* little_endian */
	943	+ 0 /* signed */);
	944	+ Py_DECREF(v);
	945	+ return res;
	946	+}
	947	+
	948	+static int
	949	+bp_float(char p, PyObject v, const formatdef *f)
	950	+{
	951	+ double x = PyFloat_AsDouble(v);
	952	+ if (x == -1 && PyErr_Occurred()) {
	953	+ PyErr_SetString(StructError,
	954	+ "required argument is not a float");
	955	+ return -1;
	956	+ }
	957	+ return _PyFloat_Pack4(x, (unsigned char *)p, 0);
	958	+}
	959	+
	960	+static int
	961	+bp_double(char p, PyObject v, const formatdef *f)
	962	+{
	963	+ double x = PyFloat_AsDouble(v);
	964	+ if (x == -1 && PyErr_Occurred()) {
	965	+ PyErr_SetString(StructError,
	966	+ "required argument is not a float");
	967	+ return -1;
	968	+ }
	969	+ return _PyFloat_Pack8(x, (unsigned char *)p, 0);
	970	+}
	971	+
	972	+static formatdef bigendian_table[] = {
	973	+ {'x', 1, 0, NULL},
	974	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	975	+ /* Native packers do range checking without overflow masking. */
	976	+ {'b', 1, 0, nu_byte, bp_int},
	977	+ {'B', 1, 0, nu_ubyte, bp_uint},
	978	+#else
	979	+ {'b', 1, 0, nu_byte, np_byte},
	980	+ {'B', 1, 0, nu_ubyte, np_ubyte},
	981	+#endif
	982	+ {'c', 1, 0, nu_char, np_char},
	983	+ {'s', 1, 0, NULL},
	984	+ {'p', 1, 0, NULL},
	985	+ {'h', 2, 0, bu_int, bp_int},
	986	+ {'H', 2, 0, bu_uint, bp_uint},
	987	+ {'i', 4, 0, bu_int, bp_int},
	988	+ {'I', 4, 0, bu_uint, bp_uint},
	989	+ {'l', 4, 0, bu_int, bp_int},
	990	+ {'L', 4, 0, bu_uint, bp_uint},
	991	+ {'q', 8, 0, bu_longlong, bp_longlong},
	992	+ {'Q', 8, 0, bu_ulonglong, bp_ulonglong},
	993	+ {'f', 4, 0, bu_float, bp_float},
	994	+ {'d', 8, 0, bu_double, bp_double},
	995	+ {0}
	996	+};
	997	+
	998	+/* Little-endian routines. *****************************************************/
	999	+
	1000	+static PyObject *
	1001	+lu_int(const char p, const formatdef f)
	1002	+{
	1003	+ long x = 0;
	1004	+ Py_ssize_t i = f->size;
	1005	+ const unsigned char bytes = (const unsigned char )p;
	1006	+ do {
	1007	+ x = (x<<8) \| bytes[--i];
	1008	+ } while (i > 0);
	1009	+ /* Extend the sign bit. */
	1010	+ if (SIZEOF_LONG > f->size)
	1011	+ x \|= -(x & (1L << ((8 * f->size) - 1)));
	1012	+ return PyInt_FromLong(x);
	1013	+}
	1014	+
	1015	+static PyObject *
	1016	+lu_uint(const char p, const formatdef f)
	1017	+{
	1018	+ unsigned long x = 0;
	1019	+ Py_ssize_t i = f->size;
	1020	+ const unsigned char bytes = (const unsigned char )p;
	1021	+ do {
	1022	+ x = (x<<8) \| bytes[--i];
	1023	+ } while (i > 0);
	1024	+ if (x <= LONG_MAX)
	1025	+ return PyInt_FromLong((long)x);
	1026	+ return PyLong_FromUnsignedLong((long)x);
	1027	+}
	1028	+
	1029	+static PyObject *
	1030	+lu_longlong(const char p, const formatdef f)
	1031	+{
	1032	+#ifdef HAVE_LONG_LONG
	1033	+ PY_LONG_LONG x = 0;
	1034	+ Py_ssize_t i = f->size;
	1035	+ const unsigned char bytes = (const unsigned char )p;
	1036	+ do {
	1037	+ x = (x<<8) \| bytes[--i];
	1038	+ } while (i > 0);
	1039	+ /* Extend the sign bit. */
	1040	+ if (SIZEOF_LONG_LONG > f->size)
	1041	+ x \|= -(x & ( (PY_LONG_LONG)1 << ((8 * f->size) - 1)));
	1042	+ if (x >= LONG_MIN && x <= LONG_MAX)
	1043	+ return PyInt_FromLong(Py_SAFE_DOWNCAST(x, PY_LONG_LONG, long));
	1044	+ return PyLong_FromLongLong(x);
	1045	+#else
	1046	+ return _PyLong_FromByteArray((const unsigned char *)p,
	1047	+ 8,
	1048	+ 1, /* little-endian */
	1049	+ 1 /* signed */);
	1050	+#endif
	1051	+}
	1052	+
	1053	+static PyObject *
	1054	+lu_ulonglong(const char p, const formatdef f)
	1055	+{
	1056	+#ifdef HAVE_LONG_LONG
	1057	+ unsigned PY_LONG_LONG x = 0;
	1058	+ Py_ssize_t i = f->size;
	1059	+ const unsigned char bytes = (const unsigned char )p;
	1060	+ do {
	1061	+ x = (x<<8) \| bytes[--i];
	1062	+ } while (i > 0);
	1063	+ if (x <= LONG_MAX)
	1064	+ return PyInt_FromLong(Py_SAFE_DOWNCAST(x, unsigned PY_LONG_LONG, long));
	1065	+ return PyLong_FromUnsignedLongLong(x);
	1066	+#else
	1067	+ return _PyLong_FromByteArray((const unsigned char *)p,
	1068	+ 8,
	1069	+ 1, /* little-endian */
	1070	+ 0 /* signed */);
	1071	+#endif
	1072	+}
	1073	+
	1074	+static PyObject *
	1075	+lu_float(const char p, const formatdef f)
	1076	+{
	1077	+ return unpack_float(p, 1);
	1078	+}
	1079	+
	1080	+static PyObject *
	1081	+lu_double(const char p, const formatdef f)
	1082	+{
	1083	+ return unpack_double(p, 1);
	1084	+}
	1085	+
	1086	+static int
	1087	+lp_int(char p, PyObject v, const formatdef *f)
	1088	+{
	1089	+ long x;
	1090	+ Py_ssize_t i;
	1091	+ if (get_wrapped_long(v, &x) < 0)
	1092	+ return -1;
	1093	+ i = f->size;
	1094	+ if (i != SIZEOF_LONG) {
	1095	+ if ((i == 2) && (x < -32768 \|\| x > 32767))
	1096	+ RANGE_ERROR(x, f, 0, 0xffffL);
	1097	+#if (SIZEOF_LONG != 4)
	1098	+ else if ((i == 4) && (x < -2147483648L \|\| x > 2147483647L))
	1099	+ RANGE_ERROR(x, f, 0, 0xffffffffL);
	1100	+#endif
	1101	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	1102	+ else if ((i == 1) && (x < -128 \|\| x > 127))
	1103	+ RANGE_ERROR(x, f, 0, 0xffL);
	1104	+#endif
	1105	+ }
	1106	+ do {
	1107	+ *p++ = (char)x;
	1108	+ x >>= 8;
	1109	+ } while (--i > 0);
	1110	+ return 0;
	1111	+}
	1112	+
	1113	+static int
	1114	+lp_uint(char p, PyObject v, const formatdef *f)
	1115	+{
	1116	+ unsigned long x;
	1117	+ Py_ssize_t i;
	1118	+ if (get_wrapped_ulong(v, &x) < 0)
	1119	+ return -1;
	1120	+ i = f->size;
	1121	+ if (i != SIZEOF_LONG) {
	1122	+ unsigned long maxint = 1;
	1123	+ maxint <<= (unsigned long)(i * 8);
	1124	+ if (x >= maxint)
	1125	+ RANGE_ERROR(x, f, 1, maxint - 1);
	1126	+ }
	1127	+ do {
	1128	+ *p++ = (char)x;
	1129	+ x >>= 8;
	1130	+ } while (--i > 0);
	1131	+ return 0;
	1132	+}
	1133	+
	1134	+static int
	1135	+lp_longlong(char p, PyObject v, const formatdef *f)
	1136	+{
	1137	+ int res;
	1138	+ v = get_pylong(v);
	1139	+ if (v == NULL)
	1140	+ return -1;
	1141	+ res = _PyLong_AsByteArray((PyLongObject*)v,
	1142	+ (unsigned char *)p,
	1143	+ 8,
	1144	+ 1, /* little_endian */
	1145	+ 1 /* signed */);
	1146	+ Py_DECREF(v);
	1147	+ return res;
	1148	+}
	1149	+
	1150	+static int
	1151	+lp_ulonglong(char p, PyObject v, const formatdef *f)
	1152	+{
	1153	+ int res;
	1154	+ v = get_pylong(v);
	1155	+ if (v == NULL)
	1156	+ return -1;
	1157	+ res = _PyLong_AsByteArray((PyLongObject*)v,
	1158	+ (unsigned char *)p,
	1159	+ 8,
	1160	+ 1, /* little_endian */
	1161	+ 0 /* signed */);
	1162	+ Py_DECREF(v);
	1163	+ return res;
	1164	+}
	1165	+
	1166	+static int
	1167	+lp_float(char p, PyObject v, const formatdef *f)
	1168	+{
	1169	+ double x = PyFloat_AsDouble(v);
	1170	+ if (x == -1 && PyErr_Occurred()) {
	1171	+ PyErr_SetString(StructError,
	1172	+ "required argument is not a float");
	1173	+ return -1;
	1174	+ }
	1175	+ return _PyFloat_Pack4(x, (unsigned char *)p, 1);
	1176	+}
	1177	+
	1178	+static int
	1179	+lp_double(char p, PyObject v, const formatdef *f)
	1180	+{
	1181	+ double x = PyFloat_AsDouble(v);
	1182	+ if (x == -1 && PyErr_Occurred()) {
	1183	+ PyErr_SetString(StructError,
	1184	+ "required argument is not a float");
	1185	+ return -1;
	1186	+ }
	1187	+ return _PyFloat_Pack8(x, (unsigned char *)p, 1);
	1188	+}
	1189	+
	1190	+static formatdef lilendian_table[] = {
	1191	+ {'x', 1, 0, NULL},
	1192	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	1193	+ /* Native packers do range checking without overflow masking. */
	1194	+ {'b', 1, 0, nu_byte, lp_int},
	1195	+ {'B', 1, 0, nu_ubyte, lp_uint},
	1196	+#else
	1197	+ {'b', 1, 0, nu_byte, np_byte},
	1198	+ {'B', 1, 0, nu_ubyte, np_ubyte},
	1199	+#endif
	1200	+ {'c', 1, 0, nu_char, np_char},
	1201	+ {'s', 1, 0, NULL},
	1202	+ {'p', 1, 0, NULL},
	1203	+ {'h', 2, 0, lu_int, lp_int},
	1204	+ {'H', 2, 0, lu_uint, lp_uint},
	1205	+ {'i', 4, 0, lu_int, lp_int},
	1206	+ {'I', 4, 0, lu_uint, lp_uint},
	1207	+ {'l', 4, 0, lu_int, lp_int},
	1208	+ {'L', 4, 0, lu_uint, lp_uint},
	1209	+ {'q', 8, 0, lu_longlong, lp_longlong},
	1210	+ {'Q', 8, 0, lu_ulonglong, lp_ulonglong},
	1211	+ {'f', 4, 0, lu_float, lp_float},
	1212	+ {'d', 8, 0, lu_double, lp_double},
	1213	+ {0}
	1214	+};
	1215	+
	1216	+
	1217	+static const formatdef *
	1218	+whichtable(char **pfmt)
	1219	+{
	1220	+ const char fmt = (pfmt)++; /* May be backed out of later */
	1221	+ switch (*fmt) {
	1222	+ case '<':
	1223	+ return lilendian_table;
	1224	+ case '>':
	1225	+ case '!': /* Network byte order is big-endian */
	1226	+ return bigendian_table;
	1227	+ case '=': { /* Host byte order -- different from native in aligment! */
	1228	+ int n = 1;
	1229	+ char p = (char ) &n;
	1230	+ if (*p == 1)
	1231	+ return lilendian_table;
	1232	+ else
	1233	+ return bigendian_table;
	1234	+ }
	1235	+ default:
	1236	+ --pfmt; / Back out of pointer increment */
	1237	+ /* Fall through */
	1238	+ case '@':
	1239	+ return native_table;
	1240	+ }
	1241	+}
	1242	+
	1243	+
	1244	+/* Get the table entry for a format code */
	1245	+
	1246	+static const formatdef *
	1247	+getentry(int c, const formatdef *f)
	1248	+{
	1249	+ for (; f->format != '\0'; f++) {
	1250	+ if (f->format == c) {
	1251	+ return f;
	1252	+ }
	1253	+ }
	1254	+ PyErr_SetString(StructError, "bad char in struct format");
	1255	+ return NULL;
	1256	+}
	1257	+
	1258	+
	1259	+/* Align a size according to a format code */
	1260	+
	1261	+static int
	1262	+align(Py_ssize_t size, char c, const formatdef *e)
	1263	+{
	1264	+ if (e->format == c) {
	1265	+ if (e->alignment) {
	1266	+ size = ((size + e->alignment - 1)
	1267	+ / e->alignment)
	1268	+ * e->alignment;
	1269	+ }
	1270	+ }
	1271	+ return size;
	1272	+}
	1273	+
	1274	+
	1275	+/* calculate the size of a format string */
	1276	+
	1277	+static int
	1278	+prepare_s(PyStructObject *self)
	1279	+{
	1280	+ const formatdef *f;
	1281	+ const formatdef *e;
	1282	+ formatcode *codes;
	1283	+
	1284	+ const char *s;
	1285	+ const char *fmt;
	1286	+ char c;
	1287	+ Py_ssize_t size, len, num, itemsize, x;
	1288	+
	1289	+ fmt = PyString_AS_STRING(self->s_format);
	1290	+
	1291	+ f = whichtable((char **)&fmt);
	1292	+
	1293	+ s = fmt;
	1294	+ size = 0;
	1295	+ len = 0;
	1296	+ while ((c = *s++) != '\0') {
	1297	+ if (isspace(Py_CHARMASK(c)))
	1298	+ continue;
	1299	+ if ('0' <= c && c <= '9') {
	1300	+ num = c - '0';
	1301	+ while ('0' <= (c = *s++) && c <= '9') {
	1302	+ x = num*10 + (c - '0');
	1303	+ if (x/10 != num) {
	1304	+ PyErr_SetString(
	1305	+ StructError,
	1306	+ "overflow in item count");
	1307	+ return -1;
	1308	+ }
	1309	+ num = x;
	1310	+ }
	1311	+ if (c == '\0')
	1312	+ break;
	1313	+ }
	1314	+ else
	1315	+ num = 1;
	1316	+
	1317	+ e = getentry(c, f);
	1318	+ if (e == NULL)
	1319	+ return -1;
	1320	+
	1321	+ switch (c) {
	1322	+ case 's': /* fall through */
	1323	+ case 'p': len++; break;
	1324	+ case 'x': break;
	1325	+ default: len += num; break;
	1326	+ }
	1327	+
	1328	+ itemsize = e->size;
	1329	+ size = align(size, c, e);
	1330	+ x = num * itemsize;
	1331	+ size += x;
	1332	+ if (x/itemsize != num \|\| size < 0) {
	1333	+ PyErr_SetString(StructError,
	1334	+ "total struct size too long");
	1335	+ return -1;
	1336	+ }
	1337	+ }
	1338	+
	1339	+ self->s_size = size;
	1340	+ self->s_len = len;
	1341	+ codes = PyMem_MALLOC((len + 1) * sizeof(formatcode));
	1342	+ if (codes == NULL) {
	1343	+ PyErr_NoMemory();
	1344	+ return -1;
	1345	+ }
	1346	+ self->s_codes = codes;
	1347	+
	1348	+ s = fmt;
	1349	+ size = 0;
	1350	+ while ((c = *s++) != '\0') {
	1351	+ if (isspace(Py_CHARMASK(c)))
	1352	+ continue;
	1353	+ if ('0' <= c && c <= '9') {
	1354	+ num = c - '0';
	1355	+ while ('0' <= (c = *s++) && c <= '9')
	1356	+ num = num*10 + (c - '0');
	1357	+ if (c == '\0')
	1358	+ break;
	1359	+ }
	1360	+ else
	1361	+ num = 1;
	1362	+
	1363	+ e = getentry(c, f);
	1364	+
	1365	+ size = align(size, c, e);
	1366	+ if (c == 's' \|\| c == 'p') {
	1367	+ codes->offset = size;
	1368	+ codes->size = num;
	1369	+ codes->fmtdef = e;
	1370	+ codes++;
	1371	+ size += num;
	1372	+ } else if (c == 'x') {
	1373	+ size += num;
	1374	+ } else {
	1375	+ while (--num >= 0) {
	1376	+ codes->offset = size;
	1377	+ codes->size = e->size;
	1378	+ codes->fmtdef = e;
	1379	+ codes++;
	1380	+ size += e->size;
	1381	+ }
	1382	+ }
	1383	+ }
	1384	+ codes->fmtdef = NULL;
	1385	+ codes->offset = size;
	1386	+ codes->size = 0;
	1387	+
	1388	+ return 0;
	1389	+}
	1390	+
	1391	+static PyObject *
	1392	+s_new(PyTypeObject type, PyObject args, PyObject *kwds)
	1393	+{
	1394	+ PyObject *self;
	1395	+
	1396	+ assert(type != NULL && type->tp_alloc != NULL);
	1397	+
	1398	+ self = type->tp_alloc(type, 0);
	1399	+ if (self != NULL) {
	1400	+ PyStructObject s = (PyStructObject)self;
	1401	+ Py_INCREF(Py_None);
	1402	+ s->s_format = Py_None;
	1403	+ s->s_codes = NULL;
	1404	+ s->s_size = -1;
	1405	+ s->s_len = -1;
	1406	+ }
	1407	+ return self;
	1408	+}
	1409	+
	1410	+static int
	1411	+s_init(PyObject self, PyObject args, PyObject *kwds)
	1412	+{
	1413	+ PyStructObject soself = (PyStructObject )self;
	1414	+ PyObject *o_format = NULL;
	1415	+ int ret = 0;
	1416	+ static char *kwlist[] = {"format", 0};
	1417	+
	1418	+ assert(PyStruct_Check(self));
	1419	+
	1420	+ if (!PyArg_ParseTupleAndKeywords(args, kwds, "S:Struct", kwlist,
	1421	+ &o_format))
	1422	+ return -1;
	1423	+
	1424	+ Py_INCREF(o_format);
	1425	+ Py_XDECREF(soself->s_format);
	1426	+ soself->s_format = o_format;
	1427	+
	1428	+ ret = prepare_s(soself);
	1429	+ return ret;
	1430	+}
	1431	+
	1432	+static void
	1433	+s_dealloc(PyStructObject *s)
	1434	+{
	1435	+ if (s->weakreflist != NULL)
	1436	+ PyObject_ClearWeakRefs((PyObject *)s);
	1437	+ if (s->s_codes != NULL) {
	1438	+ PyMem_FREE(s->s_codes);
	1439	+ }
	1440	+ Py_XDECREF(s->s_format);
	1441	+ s->ob_type->tp_free((PyObject *)s);
	1442	+}
	1443	+
	1444	+static PyObject *
	1445	+s_unpack_internal(PyStructObject soself, char startfrom) {
	1446	+ formatcode *code;
	1447	+ Py_ssize_t i = 0;
	1448	+ PyObject *result = PyTuple_New(soself->s_len);
	1449	+ if (result == NULL)
	1450	+ return NULL;
	1451	+
	1452	+ for (code = soself->s_codes; code->fmtdef != NULL; code++) {
	1453	+ PyObject *v;
	1454	+ const formatdef *e = code->fmtdef;
	1455	+ const char *res = startfrom + code->offset;
	1456	+ if (e->format == 's') {
	1457	+ v = PyString_FromStringAndSize(res, code->size);
	1458	+ } else if (e->format == 'p') {
	1459	+ Py_ssize_t n = (unsigned char)res;
	1460	+ if (n >= code->size)
	1461	+ n = code->size - 1;
	1462	+ v = PyString_FromStringAndSize(res + 1, n);
	1463	+ } else {
	1464	+ v = e->unpack(res, e);
	1465	+ }
	1466	+ if (v == NULL)
	1467	+ goto fail;
	1468	+ PyTuple_SET_ITEM(result, i++, v);
	1469	+ }
	1470	+
	1471	+ return result;
	1472	+fail:
	1473	+ Py_DECREF(result);
	1474	+ return NULL;
	1475	+}
	1476	+
	1477	+
	1478	+PyDoc_STRVAR(s_unpack__doc__,
	1479	+"S.unpack(str) -> (v1, v2, ...)\n\
	1480	+\n\
	1481	+Return tuple containing values unpacked according to this Struct's format.\n\
	1482	+Requires len(str) == self.size. See struct.__doc__ for more on format\n\
	1483	+strings.");
	1484	+
	1485	+static PyObject *
	1486	+s_unpack(PyObject self, PyObject inputstr)
	1487	+{
	1488	+ char *start;
	1489	+ Py_ssize_t len;
	1490	+ PyObject args=NULL, result;
	1491	+ PyStructObject soself = (PyStructObject )self;
	1492	+ assert(PyStruct_Check(self));
	1493	+ assert(soself->s_codes != NULL);
	1494	+ if (inputstr == NULL)
	1495	+ goto fail;
	1496	+ if (PyString_Check(inputstr) &&
	1497	+ PyString_GET_SIZE(inputstr) == soself->s_size) {
	1498	+ return s_unpack_internal(soself, PyString_AS_STRING(inputstr));
	1499	+ }
	1500	+ args = PyTuple_Pack(1, inputstr);
	1501	+ if (args == NULL)
	1502	+ return NULL;
	1503	+ if (!PyArg_ParseTuple(args, "s#:unpack", &start, &len))
	1504	+ goto fail;
	1505	+ if (soself->s_size != len)
	1506	+ goto fail;
	1507	+ result = s_unpack_internal(soself, start);
	1508	+ Py_DECREF(args);
	1509	+ return result;
	1510	+
	1511	+fail:
	1512	+ Py_XDECREF(args);
	1513	+ PyErr_Format(StructError,
	1514	+ "unpack requires a string argument of length %zd",
	1515	+ soself->s_size);
	1516	+ return NULL;
	1517	+}
	1518	+
	1519	+PyDoc_STRVAR(s_unpack_from__doc__,
	1520	+"S.unpack_from(buffer[, offset]) -> (v1, v2, ...)\n\
	1521	+\n\
	1522	+Return tuple containing values unpacked according to this Struct's format.\n\
	1523	+Unlike unpack, unpack_from can unpack values from any object supporting\n\
	1524	+the buffer API, not just str. Requires len(buffer[offset:]) >= self.size.\n\
	1525	+See struct.__doc__ for more on format strings.");
	1526	+
	1527	+static PyObject *
	1528	+s_unpack_from(PyObject self, PyObject args, PyObject *kwds)
	1529	+{
	1530	+ static char *kwlist[] = {"buffer", "offset", 0};
	1531	+#if (PY_VERSION_HEX < 0x02050000)
	1532	+ static char *fmt = "z#\|i:unpack_from";
	1533	+#else
	1534	+ static char *fmt = "z#\|n:unpack_from";
	1535	+#endif
	1536	+ Py_ssize_t buffer_len = 0, offset = 0;
	1537	+ char *buffer = NULL;
	1538	+ PyStructObject soself = (PyStructObject )self;
	1539	+ assert(PyStruct_Check(self));
	1540	+ assert(soself->s_codes != NULL);
	1541	+
	1542	+ if (!PyArg_ParseTupleAndKeywords(args, kwds, fmt, kwlist,
	1543	+ &buffer, &buffer_len, &offset))
	1544	+ return NULL;
	1545	+
	1546	+ if (buffer == NULL) {
	1547	+ PyErr_Format(StructError,
	1548	+ "unpack_from requires a buffer argument");
	1549	+ return NULL;
	1550	+ }
	1551	+
	1552	+ if (offset < 0)
	1553	+ offset += buffer_len;
	1554	+
	1555	+ if (offset < 0 \|\| (buffer_len - offset) < soself->s_size) {
	1556	+ PyErr_Format(StructError,
	1557	+ "unpack_from requires a buffer of at least %zd bytes",
	1558	+ soself->s_size);
	1559	+ return NULL;
	1560	+ }
	1561	+ return s_unpack_internal(soself, buffer + offset);
	1562	+}
	1563	+
	1564	+
	1565	+/*
	1566	+ * Guts of the pack function.
	1567	+ *
	1568	+ * Takes a struct object, a tuple of arguments, and offset in that tuple of
	1569	+ * argument for where to start processing the arguments for packing, and a
	1570	+ * character buffer for writing the packed string. The caller must insure
	1571	+ * that the buffer may contain the required length for packing the arguments.
	1572	+ * 0 is returned on success, 1 is returned if there is an error.
	1573	+ *
	1574	+ */
	1575	+static int
	1576	+s_pack_internal(PyStructObject soself, PyObject args, int offset, char* buf)
	1577	+{
	1578	+ formatcode *code;
	1579	+ /* XXX(nnorwitz): why does i need to be a local? can we use
	1580	+ the offset parameter or do we need the wider width? */
	1581	+ Py_ssize_t i;
	1582	+
	1583	+ memset(buf, '\0', soself->s_size);
	1584	+ i = offset;
	1585	+ for (code = soself->s_codes; code->fmtdef != NULL; code++) {
	1586	+ Py_ssize_t n;
	1587	+ PyObject *v = PyTuple_GET_ITEM(args, i++);
	1588	+ const formatdef *e = code->fmtdef;
	1589	+ char *res = buf + code->offset;
	1590	+ if (e->format == 's') {
	1591	+ if (!PyString_Check(v)) {
	1592	+ PyErr_SetString(StructError,
	1593	+ "argument for 's' must be a string");
	1594	+ return -1;
	1595	+ }
	1596	+ n = PyString_GET_SIZE(v);
	1597	+ if (n > code->size)
	1598	+ n = code->size;
	1599	+ if (n > 0)
	1600	+ memcpy(res, PyString_AS_STRING(v), n);
	1601	+ } else if (e->format == 'p') {
	1602	+ if (!PyString_Check(v)) {
	1603	+ PyErr_SetString(StructError,
	1604	+ "argument for 'p' must be a string");
	1605	+ return -1;
	1606	+ }
	1607	+ n = PyString_GET_SIZE(v);
	1608	+ if (n > (code->size - 1))
	1609	+ n = code->size - 1;
	1610	+ if (n > 0)
	1611	+ memcpy(res + 1, PyString_AS_STRING(v), n);
	1612	+ if (n > 255)
	1613	+ n = 255;
	1614	+ *res = Py_SAFE_DOWNCAST(n, Py_ssize_t, unsigned char);
	1615	+ } else {
	1616	+ if (e->pack(res, v, e) < 0) {
	1617	+ if (PyLong_Check(v) && PyErr_ExceptionMatches(PyExc_OverflowError))
	1618	+ PyErr_SetString(StructError,
	1619	+ "long too large to convert to int");
	1620	+ return -1;
	1621	+ }
	1622	+ }
	1623	+ }
	1624	+
	1625	+ /* Success */
	1626	+ return 0;
	1627	+}
	1628	+
	1629	+
	1630	+PyDoc_STRVAR(s_pack__doc__,
	1631	+"S.pack(v1, v2, ...) -> string\n\
	1632	+\n\
	1633	+Return a string containing values v1, v2, ... packed according to this\n\
	1634	+Struct's format. See struct.__doc__ for more on format strings.");
	1635	+
	1636	+static PyObject *
	1637	+s_pack(PyObject self, PyObject args)
	1638	+{
	1639	+ PyStructObject *soself;
	1640	+ PyObject *result;
	1641	+
	1642	+ /* Validate arguments. */
	1643	+ soself = (PyStructObject *)self;
	1644	+ assert(PyStruct_Check(self));
	1645	+ assert(soself->s_codes != NULL);
	1646	+ if (PyTuple_GET_SIZE(args) != soself->s_len)
	1647	+ {
	1648	+ PyErr_Format(StructError,
	1649	+ "pack requires exactly %zd arguments", soself->s_len);
	1650	+ return NULL;
	1651	+ }
	1652	+
	1653	+ /* Allocate a new string */
	1654	+ result = PyString_FromStringAndSize((char *)NULL, soself->s_size);
	1655	+ if (result == NULL)
	1656	+ return NULL;
	1657	+
	1658	+ /* Call the guts */
	1659	+ if ( s_pack_internal(soself, args, 0, PyString_AS_STRING(result)) != 0 ) {
	1660	+ Py_DECREF(result);
	1661	+ return NULL;
	1662	+ }
	1663	+
	1664	+ return result;
	1665	+}
	1666	+
	1667	+PyDoc_STRVAR(s_pack_into__doc__,
	1668	+"S.pack_into(buffer, offset, v1, v2, ...)\n\
	1669	+\n\
	1670	+Pack the values v1, v2, ... according to this Struct's format, write \n\
	1671	+the packed bytes into the writable buffer buf starting at offset. Note\n\
	1672	+that the offset is not an optional argument. See struct.__doc__ for \n\
	1673	+more on format strings.");
	1674	+
	1675	+static PyObject *
	1676	+s_pack_into(PyObject self, PyObject args)
	1677	+{
	1678	+ PyStructObject *soself;
	1679	+ char *buffer;
	1680	+ Py_ssize_t buffer_len, offset;
	1681	+
	1682	+ /* Validate arguments. +1 is for the first arg as buffer. */
	1683	+ soself = (PyStructObject *)self;
	1684	+ assert(PyStruct_Check(self));
	1685	+ assert(soself->s_codes != NULL);
	1686	+ if (PyTuple_GET_SIZE(args) != (soself->s_len + 2))
	1687	+ {
	1688	+ PyErr_Format(StructError,
	1689	+ "pack_into requires exactly %zd arguments",
	1690	+ (soself->s_len + 2));
	1691	+ return NULL;
	1692	+ }
	1693	+
	1694	+ /* Extract a writable memory buffer from the first argument */
	1695	+ if ( PyObject_AsWriteBuffer(PyTuple_GET_ITEM(args, 0),
	1696	+ (void**)&buffer, &buffer_len) == -1 ) {
	1697	+ return NULL;
	1698	+ }
	1699	+ assert( buffer_len >= 0 );
	1700	+
	1701	+ /* Extract the offset from the first argument */
	1702	+ offset = PyInt_AsSsize_t(PyTuple_GET_ITEM(args, 1));
	1703	+
	1704	+ /* Support negative offsets. */
	1705	+ if (offset < 0)
	1706	+ offset += buffer_len;
	1707	+
	1708	+ /* Check boundaries */
	1709	+ if (offset < 0 \|\| (buffer_len - offset) < soself->s_size) {
	1710	+ PyErr_Format(StructError,
	1711	+ "pack_into requires a buffer of at least %zd bytes",
	1712	+ soself->s_size);
	1713	+ return NULL;
	1714	+ }
	1715	+
	1716	+ /* Call the guts */
	1717	+ if ( s_pack_internal(soself, args, 2, buffer + offset) != 0 ) {
	1718	+ return NULL;
	1719	+ }
	1720	+
	1721	+ Py_RETURN_NONE;
	1722	+}
	1723	+
	1724	+static PyObject *
	1725	+s_get_format(PyStructObject self, void unused)
	1726	+{
	1727	+ Py_INCREF(self->s_format);
	1728	+ return self->s_format;
	1729	+}
	1730	+
	1731	+static PyObject *
	1732	+s_get_size(PyStructObject self, void unused)
	1733	+{
	1734	+ return PyInt_FromSsize_t(self->s_size);
	1735	+}
	1736	+
	1737	+/* List of functions */
	1738	+
	1739	+static struct PyMethodDef s_methods[] = {
	1740	+ {"pack", s_pack, METH_VARARGS, s_pack__doc__},
	1741	+ {"pack_into", s_pack_into, METH_VARARGS, s_pack_into__doc__},
	1742	+ {"unpack", s_unpack, METH_O, s_unpack__doc__},
	1743	+ {"unpack_from", (PyCFunction)s_unpack_from, METH_KEYWORDS,
	1744	+ s_unpack_from__doc__},
	1745	+ {NULL, NULL} /* sentinel */
	1746	+};
	1747	+
	1748	+PyDoc_STRVAR(s__doc__, "Compiled struct object");
	1749	+
	1750	+#define OFF(x) offsetof(PyStructObject, x)
	1751	+
	1752	+static PyGetSetDef s_getsetlist[] = {
	1753	+ {"format", (getter)s_get_format, (setter)NULL, "struct format string", NULL},
	1754	+ {"size", (getter)s_get_size, (setter)NULL, "struct size in bytes", NULL},
	1755	+ {NULL} /* sentinel */
	1756	+};
	1757	+
	1758	+static
	1759	+PyTypeObject PyStructType = {
	1760	+ PyObject_HEAD_INIT(NULL)
	1761	+ 0,
	1762	+ "Struct",
	1763	+ sizeof(PyStructObject),
	1764	+ 0,
	1765	+ (destructor)s_dealloc, /* tp_dealloc */
	1766	+ 0, /* tp_print */
	1767	+ 0, /* tp_getattr */
	1768	+ 0, /* tp_setattr */
	1769	+ 0, /* tp_compare */
	1770	+ 0, /* tp_repr */
	1771	+ 0, /* tp_as_number */
	1772	+ 0, /* tp_as_sequence */
	1773	+ 0, /* tp_as_mapping */
	1774	+ 0, /* tp_hash */
	1775	+ 0, /* tp_call */
	1776	+ 0, /* tp_str */
	1777	+ PyObject_GenericGetAttr, /* tp_getattro */
	1778	+ PyObject_GenericSetAttr, /* tp_setattro */
	1779	+ 0, /* tp_as_buffer */
	1780	+ Py_TPFLAGS_DEFAULT \| Py_TPFLAGS_BASETYPE \| Py_TPFLAGS_HAVE_WEAKREFS,/* tp_flags */
	1781	+ s__doc__, /* tp_doc */
	1782	+ 0, /* tp_traverse */
	1783	+ 0, /* tp_clear */
	1784	+ 0, /* tp_richcompare */
	1785	+ offsetof(PyStructObject, weakreflist), /* tp_weaklistoffset */
	1786	+ 0, /* tp_iter */
	1787	+ 0, /* tp_iternext */
	1788	+ s_methods, /* tp_methods */
	1789	+ NULL, /* tp_members */
	1790	+ s_getsetlist, /* tp_getset */
	1791	+ 0, /* tp_base */
	1792	+ 0, /* tp_dict */
	1793	+ 0, /* tp_descr_get */
	1794	+ 0, /* tp_descr_set */
	1795	+ 0, /* tp_dictoffset */
	1796	+ s_init, /* tp_init */
	1797	+ PyType_GenericAlloc,/* tp_alloc */
	1798	+ s_new, /* tp_new */
	1799	+ PyObject_Del, /* tp_free */
	1800	+};
	1801	+
	1802	+/* Module initialization */
	1803	+
	1804	+PyMODINIT_FUNC
	1805	+init_struct(void)
	1806	+{
	1807	+ PyObject *m = Py_InitModule("_struct", NULL);
	1808	+ if (m == NULL)
	1809	+ return;
	1810	+
	1811	+ PyStructType.ob_type = &PyType_Type;
	1812	+ if (PyType_Ready(&PyStructType) < 0)
	1813	+ return;
	1814	+
	1815	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	1816	+ if (pyint_zero == NULL) {
	1817	+ pyint_zero = PyInt_FromLong(0);
	1818	+ if (pyint_zero == NULL)
	1819	+ return;
	1820	+ }
	1821	+ if (pylong_ulong_mask == NULL) {
	1822	+#if (SIZEOF_LONG == 4)
	1823	+ pylong_ulong_mask = PyLong_FromString("FFFFFFFF", NULL, 16);
	1824	+#else
	1825	+ pylong_ulong_mask = PyLong_FromString("FFFFFFFFFFFFFFFF", NULL, 16);
	1826	+#endif
	1827	+ if (pylong_ulong_mask == NULL)
	1828	+ return;
	1829	+ }
	1830	+
	1831	+#else
	1832	+ /* This speed trick can't be used until overflow masking goes away, because
	1833	+ native endian always raises exceptions instead of overflow masking. */
	1834	+
	1835	+ /* Check endian and swap in faster functions */
	1836	+ {
	1837	+ int one = 1;
	1838	+ formatdef *native = native_table;
	1839	+ formatdef other, ptr;
	1840	+ if ((int)(unsigned char)&one)
	1841	+ other = lilendian_table;
	1842	+ else
	1843	+ other = bigendian_table;
	1844	+ /* Scan through the native table, find a matching
	1845	+ entry in the endian table and swap in the
	1846	+ native implementations whenever possible
	1847	+ (64-bit platforms may not have "standard" sizes) */
	1848	+ while (native->format != '\0' && other->format != '\0') {
	1849	+ ptr = other;
	1850	+ while (ptr->format != '\0') {
	1851	+ if (ptr->format == native->format) {
	1852	+ /* Match faster when formats are
	1853	+ listed in the same order */
	1854	+ if (ptr == other)
	1855	+ other++;
	1856	+ /* Only use the trick if the
	1857	+ size matches */
	1858	+ if (ptr->size != native->size)
	1859	+ break;
	1860	+ /* Skip float and double, could be
	1861	+ "unknown" float format */
	1862	+ if (ptr->format == 'd' \|\| ptr->format == 'f')
	1863	+ break;
	1864	+ ptr->pack = native->pack;
	1865	+ ptr->unpack = native->unpack;
	1866	+ break;
	1867	+ }
	1868	+ ptr++;
	1869	+ }
	1870	+ native++;
	1871	+ }
	1872	+ }
	1873	+#endif
	1874	+
	1875	+ /* Add some symbolic constants to the module */
	1876	+ if (StructError == NULL) {
	1877	+ StructError = PyErr_NewException("struct.error", NULL, NULL);
	1878	+ if (StructError == NULL)
	1879	+ return;
	1880	+ }
	1881	+
	1882	+ Py_INCREF(StructError);
	1883	+ PyModule_AddObject(m, "error", StructError);
	1884	+
	1885	+ Py_INCREF((PyObject*)&PyStructType);
	1886	+ PyModule_AddObject(m, "Struct", (PyObject*)&PyStructType);
	1887	+
	1888	+ PyModule_AddIntConstant(m, "_PY_STRUCT_RANGE_CHECKING", 1);
	1889	+#ifdef PY_STRUCT_OVERFLOW_MASKING
	1890	+ PyModule_AddIntConstant(m, "_PY_STRUCT_OVERFLOW_MASKING", 1);
	1891	+#endif
	1892	+#ifdef PY_STRUCT_FLOAT_COERCE
	1893	+ PyModule_AddIntConstant(m, "_PY_STRUCT_FLOAT_COERCE", 1);
	1894	+#endif
	1895	+
	1896	+}

add hg and python

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