Issue #5863: Rewrite BZ2File in pure Python, and allow it to accept
file-like objects using a new `fileobj` constructor argument. Patch by
Nadeem Vawda.
diff --git a/Modules/_bz2module.c b/Modules/_bz2module.c
new file mode 100644
index 0000000..522b3e5
--- /dev/null
+++ b/Modules/_bz2module.c
@@ -0,0 +1,583 @@
+/* _bz2 - Low-level Python interface to libbzip2. */
+
+#define PY_SSIZE_T_CLEAN
+
+#include "Python.h"
+#include "structmember.h"
+
+#ifdef WITH_THREAD
+#include "pythread.h"
+#endif
+
+#include <bzlib.h>
+#include <stdio.h>
+
+
+#ifndef BZ_CONFIG_ERROR
+#define BZ2_bzCompress bzCompress
+#define BZ2_bzCompressInit bzCompressInit
+#define BZ2_bzCompressEnd bzCompressEnd
+#define BZ2_bzDecompress bzDecompress
+#define BZ2_bzDecompressInit bzDecompressInit
+#define BZ2_bzDecompressEnd bzDecompressEnd
+#endif /* ! BZ_CONFIG_ERROR */
+
+
+#ifdef WITH_THREAD
+#define ACQUIRE_LOCK(obj) do { \
+ if (!PyThread_acquire_lock((obj)->lock, 0)) { \
+ Py_BEGIN_ALLOW_THREADS \
+ PyThread_acquire_lock((obj)->lock, 1); \
+ Py_END_ALLOW_THREADS \
+ } } while (0)
+#define RELEASE_LOCK(obj) PyThread_release_lock((obj)->lock)
+#else
+#define ACQUIRE_LOCK(obj)
+#define RELEASE_LOCK(obj)
+#endif
+
+
+typedef struct {
+ PyObject_HEAD
+ bz_stream bzs;
+ int flushed;
+#ifdef WITH_THREAD
+ PyThread_type_lock lock;
+#endif
+} BZ2Compressor;
+
+typedef struct {
+ PyObject_HEAD
+ bz_stream bzs;
+ char eof; /* T_BOOL expects a char */
+ PyObject *unused_data;
+#ifdef WITH_THREAD
+ PyThread_type_lock lock;
+#endif
+} BZ2Decompressor;
+
+
+/* Helper functions. */
+
+static int
+catch_bz2_error(int bzerror)
+{
+ switch(bzerror) {
+ case BZ_OK:
+ case BZ_RUN_OK:
+ case BZ_FLUSH_OK:
+ case BZ_FINISH_OK:
+ case BZ_STREAM_END:
+ return 0;
+
+#ifdef BZ_CONFIG_ERROR
+ case BZ_CONFIG_ERROR:
+ PyErr_SetString(PyExc_SystemError,
+ "libbzip2 was not compiled correctly");
+ return 1;
+#endif
+ case BZ_PARAM_ERROR:
+ PyErr_SetString(PyExc_ValueError,
+ "Internal error - "
+ "invalid parameters passed to libbzip2");
+ return 1;
+ case BZ_MEM_ERROR:
+ PyErr_NoMemory();
+ return 1;
+ case BZ_DATA_ERROR:
+ case BZ_DATA_ERROR_MAGIC:
+ PyErr_SetString(PyExc_IOError, "Invalid data stream");
+ return 1;
+ case BZ_IO_ERROR:
+ PyErr_SetString(PyExc_IOError, "Unknown I/O error");
+ return 1;
+ case BZ_UNEXPECTED_EOF:
+ PyErr_SetString(PyExc_EOFError,
+ "Compressed file ended before the logical "
+ "end-of-stream was detected");
+ return 1;
+ case BZ_SEQUENCE_ERROR:
+ PyErr_SetString(PyExc_RuntimeError,
+ "Internal error - "
+ "Invalid sequence of commands sent to libbzip2");
+ return 1;
+ default:
+ PyErr_Format(PyExc_IOError,
+ "Unrecognized error from libbzip2: %d", bzerror);
+ return 1;
+ }
+}
+
+#if BUFSIZ < 8192
+#define SMALLCHUNK 8192
+#else
+#define SMALLCHUNK BUFSIZ
+#endif
+
+#if SIZEOF_INT < 4
+#define BIGCHUNK (512 * 32)
+#else
+#define BIGCHUNK (512 * 1024)
+#endif
+
+static int
+grow_buffer(PyObject **buf)
+{
+ size_t size = PyBytes_GET_SIZE(*buf);
+ if (size <= SMALLCHUNK)
+ return _PyBytes_Resize(buf, size + SMALLCHUNK);
+ else if (size <= BIGCHUNK)
+ return _PyBytes_Resize(buf, size * 2);
+ else
+ return _PyBytes_Resize(buf, size + BIGCHUNK);
+}
+
+
+/* BZ2Compressor class. */
+
+static PyObject *
+compress(BZ2Compressor *c, char *data, size_t len, int action)
+{
+ size_t data_size = 0;
+ PyObject *result;
+
+ result = PyBytes_FromStringAndSize(NULL, SMALLCHUNK);
+ if (result == NULL)
+ return NULL;
+ c->bzs.next_in = data;
+ /* FIXME This is not 64-bit clean - avail_in is an int. */
+ c->bzs.avail_in = len;
+ c->bzs.next_out = PyBytes_AS_STRING(result);
+ c->bzs.avail_out = PyBytes_GET_SIZE(result);
+ for (;;) {
+ char *this_out;
+ int bzerror;
+
+ Py_BEGIN_ALLOW_THREADS
+ this_out = c->bzs.next_out;
+ bzerror = BZ2_bzCompress(&c->bzs, action);
+ data_size += c->bzs.next_out - this_out;
+ Py_END_ALLOW_THREADS
+ if (catch_bz2_error(bzerror))
+ goto error;
+
+ /* In regular compression mode, stop when input data is exhausted.
+ In flushing mode, stop when all buffered data has been flushed. */
+ if ((action == BZ_RUN && c->bzs.avail_in == 0) ||
+ (action == BZ_FINISH && bzerror == BZ_STREAM_END))
+ break;
+
+ if (c->bzs.avail_out == 0) {
+ if (grow_buffer(&result) < 0)
+ goto error;
+ c->bzs.next_out = PyBytes_AS_STRING(result) + data_size;
+ c->bzs.avail_out = PyBytes_GET_SIZE(result) - data_size;
+ }
+ }
+ if (data_size != PyBytes_GET_SIZE(result))
+ if (_PyBytes_Resize(&result, data_size) < 0)
+ goto error;
+ return result;
+
+error:
+ Py_XDECREF(result);
+ return NULL;
+}
+
+PyDoc_STRVAR(BZ2Compressor_compress__doc__,
+"compress(data) -> bytes\n"
+"\n"
+"Provide data to the compressor object. Returns a chunk of\n"
+"compressed data if possible, or b'' otherwise.\n"
+"\n"
+"When you have finished providing data to the compressor, call the\n"
+"flush() method to finish the compression process.\n");
+
+static PyObject *
+BZ2Compressor_compress(BZ2Compressor *self, PyObject *args)
+{
+ Py_buffer buffer;
+ PyObject *result = NULL;
+
+ if (!PyArg_ParseTuple(args, "y*:compress", &buffer))
+ return NULL;
+
+ ACQUIRE_LOCK(self);
+ if (self->flushed)
+ PyErr_SetString(PyExc_ValueError, "Compressor has been flushed");
+ else
+ result = compress(self, buffer.buf, buffer.len, BZ_RUN);
+ RELEASE_LOCK(self);
+ PyBuffer_Release(&buffer);
+ return result;
+}
+
+PyDoc_STRVAR(BZ2Compressor_flush__doc__,
+"flush() -> bytes\n"
+"\n"
+"Finish the compression process. Returns the compressed data left\n"
+"in internal buffers.\n"
+"\n"
+"The compressor object may not be used after this method is called.\n");
+
+static PyObject *
+BZ2Compressor_flush(BZ2Compressor *self, PyObject *noargs)
+{
+ PyObject *result = NULL;
+
+ ACQUIRE_LOCK(self);
+ if (self->flushed)
+ PyErr_SetString(PyExc_ValueError, "Repeated call to flush()");
+ else {
+ self->flushed = 1;
+ result = compress(self, NULL, 0, BZ_FINISH);
+ }
+ RELEASE_LOCK(self);
+ return result;
+}
+
+static int
+BZ2Compressor_init(BZ2Compressor *self, PyObject *args, PyObject *kwargs)
+{
+ int compresslevel = 9;
+ int bzerror;
+
+ if (!PyArg_ParseTuple(args, "|i:BZ2Compressor", &compresslevel))
+ return -1;
+ if (!(1 <= compresslevel && compresslevel <= 9)) {
+ PyErr_SetString(PyExc_ValueError,
+ "compresslevel must be between 1 and 9");
+ return -1;
+ }
+
+#ifdef WITH_THREAD
+ self->lock = PyThread_allocate_lock();
+ if (self->lock == NULL) {
+ PyErr_SetString(PyExc_MemoryError, "Unable to allocate lock");
+ return -1;
+ }
+#endif
+
+ bzerror = BZ2_bzCompressInit(&self->bzs, compresslevel, 0, 0);
+ if (catch_bz2_error(bzerror))
+ goto error;
+
+ return 0;
+
+error:
+#ifdef WITH_THREAD
+ PyThread_free_lock(self->lock);
+ self->lock = NULL;
+#endif
+ return -1;
+}
+
+static void
+BZ2Compressor_dealloc(BZ2Compressor *self)
+{
+ BZ2_bzCompressEnd(&self->bzs);
+#ifdef WITH_THREAD
+ if (self->lock != NULL)
+ PyThread_free_lock(self->lock);
+#endif
+ Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static PyMethodDef BZ2Compressor_methods[] = {
+ {"compress", (PyCFunction)BZ2Compressor_compress, METH_VARARGS,
+ BZ2Compressor_compress__doc__},
+ {"flush", (PyCFunction)BZ2Compressor_flush, METH_NOARGS,
+ BZ2Compressor_flush__doc__},
+ {NULL}
+};
+
+PyDoc_STRVAR(BZ2Compressor__doc__,
+"BZ2Compressor(compresslevel=9)\n"
+"\n"
+"Create a compressor object for compressing data incrementally.\n"
+"\n"
+"compresslevel, if given, must be a number between 1 and 9.\n"
+"\n"
+"For one-shot compression, use the compress() function instead.\n");
+
+static PyTypeObject BZ2Compressor_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_bz2.BZ2Compressor", /* tp_name */
+ sizeof(BZ2Compressor), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)BZ2Compressor_dealloc, /* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_reserved */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT, /* tp_flags */
+ BZ2Compressor__doc__, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ BZ2Compressor_methods, /* tp_methods */
+ 0, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ (initproc)BZ2Compressor_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/* BZ2Decompressor class. */
+
+static PyObject *
+decompress(BZ2Decompressor *d, char *data, size_t len)
+{
+ size_t data_size = 0;
+ PyObject *result;
+
+ result = PyBytes_FromStringAndSize(NULL, SMALLCHUNK);
+ if (result == NULL)
+ return result;
+ d->bzs.next_in = data;
+ /* FIXME This is not 64-bit clean - avail_in is an int. */
+ d->bzs.avail_in = len;
+ d->bzs.next_out = PyBytes_AS_STRING(result);
+ d->bzs.avail_out = PyBytes_GET_SIZE(result);
+ for (;;) {
+ char *this_out;
+ int bzerror;
+
+ Py_BEGIN_ALLOW_THREADS
+ this_out = d->bzs.next_out;
+ bzerror = BZ2_bzDecompress(&d->bzs);
+ data_size += d->bzs.next_out - this_out;
+ Py_END_ALLOW_THREADS
+ if (catch_bz2_error(bzerror))
+ goto error;
+ if (bzerror == BZ_STREAM_END) {
+ d->eof = 1;
+ if (d->bzs.avail_in > 0) { /* Save leftover input to unused_data */
+ Py_CLEAR(d->unused_data);
+ d->unused_data = PyBytes_FromStringAndSize(d->bzs.next_in,
+ d->bzs.avail_in);
+ if (d->unused_data == NULL)
+ goto error;
+ }
+ break;
+ }
+ if (d->bzs.avail_in == 0)
+ break;
+ if (d->bzs.avail_out == 0) {
+ if (grow_buffer(&result) < 0)
+ goto error;
+ d->bzs.next_out = PyBytes_AS_STRING(result) + data_size;
+ d->bzs.avail_out = PyBytes_GET_SIZE(result) - data_size;
+ }
+ }
+ if (data_size != PyBytes_GET_SIZE(result))
+ if (_PyBytes_Resize(&result, data_size) < 0)
+ goto error;
+ return result;
+
+error:
+ Py_XDECREF(result);
+ return NULL;
+}
+
+PyDoc_STRVAR(BZ2Decompressor_decompress__doc__,
+"decompress(data) -> bytes\n"
+"\n"
+"Provide data to the decompressor object. Returns a chunk of\n"
+"decompressed data if possible, or b'' otherwise.\n"
+"\n"
+"Attempting to decompress data after the end of stream is reached\n"
+"raises an EOFError. Any data found after the end of the stream\n"
+"is ignored and saved in the unused_data attribute.\n");
+
+static PyObject *
+BZ2Decompressor_decompress(BZ2Decompressor *self, PyObject *args)
+{
+ Py_buffer buffer;
+ PyObject *result = NULL;
+
+ if (!PyArg_ParseTuple(args, "y*:decompress", &buffer))
+ return NULL;
+
+ ACQUIRE_LOCK(self);
+ if (self->eof)
+ PyErr_SetString(PyExc_EOFError, "End of stream already reached");
+ else
+ result = decompress(self, buffer.buf, buffer.len);
+ RELEASE_LOCK(self);
+ PyBuffer_Release(&buffer);
+ return result;
+}
+
+static int
+BZ2Decompressor_init(BZ2Decompressor *self, PyObject *args, PyObject *kwargs)
+{
+ int bzerror;
+
+ if (!PyArg_ParseTuple(args, ":BZ2Decompressor"))
+ return -1;
+
+#ifdef WITH_THREAD
+ self->lock = PyThread_allocate_lock();
+ if (self->lock == NULL) {
+ PyErr_SetString(PyExc_MemoryError, "Unable to allocate lock");
+ return -1;
+ }
+#endif
+
+ self->unused_data = PyBytes_FromStringAndSize("", 0);
+ if (self->unused_data == NULL)
+ goto error;
+
+ bzerror = BZ2_bzDecompressInit(&self->bzs, 0, 0);
+ if (catch_bz2_error(bzerror))
+ goto error;
+
+ return 0;
+
+error:
+ Py_CLEAR(self->unused_data);
+#ifdef WITH_THREAD
+ PyThread_free_lock(self->lock);
+ self->lock = NULL;
+#endif
+ return -1;
+}
+
+static void
+BZ2Decompressor_dealloc(BZ2Decompressor *self)
+{
+ BZ2_bzDecompressEnd(&self->bzs);
+ Py_CLEAR(self->unused_data);
+#ifdef WITH_THREAD
+ if (self->lock != NULL)
+ PyThread_free_lock(self->lock);
+#endif
+ Py_TYPE(self)->tp_free((PyObject *)self);
+}
+
+static PyMethodDef BZ2Decompressor_methods[] = {
+ {"decompress", (PyCFunction)BZ2Decompressor_decompress, METH_VARARGS,
+ BZ2Decompressor_decompress__doc__},
+ {NULL}
+};
+
+PyDoc_STRVAR(BZ2Decompressor_eof__doc__,
+"True if the end-of-stream marker has been reached.");
+
+PyDoc_STRVAR(BZ2Decompressor_unused_data__doc__,
+"Data found after the end of the compressed stream.");
+
+static PyMemberDef BZ2Decompressor_members[] = {
+ {"eof", T_BOOL, offsetof(BZ2Decompressor, eof),
+ READONLY, BZ2Decompressor_eof__doc__},
+ {"unused_data", T_OBJECT_EX, offsetof(BZ2Decompressor, unused_data),
+ READONLY, BZ2Decompressor_unused_data__doc__},
+ {NULL}
+};
+
+PyDoc_STRVAR(BZ2Decompressor__doc__,
+"BZ2Decompressor()\n"
+"\n"
+"Create a decompressor object for decompressing data incrementally.\n"
+"\n"
+"For one-shot decompression, use the decompress() function instead.\n");
+
+static PyTypeObject BZ2Decompressor_Type = {
+ PyVarObject_HEAD_INIT(NULL, 0)
+ "_bz2.BZ2Decompressor", /* tp_name */
+ sizeof(BZ2Decompressor), /* tp_basicsize */
+ 0, /* tp_itemsize */
+ (destructor)BZ2Decompressor_dealloc,/* tp_dealloc */
+ 0, /* tp_print */
+ 0, /* tp_getattr */
+ 0, /* tp_setattr */
+ 0, /* tp_reserved */
+ 0, /* tp_repr */
+ 0, /* tp_as_number */
+ 0, /* tp_as_sequence */
+ 0, /* tp_as_mapping */
+ 0, /* tp_hash */
+ 0, /* tp_call */
+ 0, /* tp_str */
+ 0, /* tp_getattro */
+ 0, /* tp_setattro */
+ 0, /* tp_as_buffer */
+ Py_TPFLAGS_DEFAULT, /* tp_flags */
+ BZ2Decompressor__doc__, /* tp_doc */
+ 0, /* tp_traverse */
+ 0, /* tp_clear */
+ 0, /* tp_richcompare */
+ 0, /* tp_weaklistoffset */
+ 0, /* tp_iter */
+ 0, /* tp_iternext */
+ BZ2Decompressor_methods, /* tp_methods */
+ BZ2Decompressor_members, /* tp_members */
+ 0, /* tp_getset */
+ 0, /* tp_base */
+ 0, /* tp_dict */
+ 0, /* tp_descr_get */
+ 0, /* tp_descr_set */
+ 0, /* tp_dictoffset */
+ (initproc)BZ2Decompressor_init, /* tp_init */
+ 0, /* tp_alloc */
+ PyType_GenericNew, /* tp_new */
+};
+
+
+/* Module initialization. */
+
+static struct PyModuleDef _bz2module = {
+ PyModuleDef_HEAD_INIT,
+ "_bz2",
+ NULL,
+ -1,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ NULL
+};
+
+PyMODINIT_FUNC
+PyInit__bz2(void)
+{
+ PyObject *m;
+
+ if (PyType_Ready(&BZ2Compressor_Type) < 0)
+ return NULL;
+ if (PyType_Ready(&BZ2Decompressor_Type) < 0)
+ return NULL;
+
+ m = PyModule_Create(&_bz2module);
+ if (m == NULL)
+ return NULL;
+
+ Py_INCREF(&BZ2Compressor_Type);
+ PyModule_AddObject(m, "BZ2Compressor", (PyObject *)&BZ2Compressor_Type);
+
+ Py_INCREF(&BZ2Decompressor_Type);
+ PyModule_AddObject(m, "BZ2Decompressor",
+ (PyObject *)&BZ2Decompressor_Type);
+
+ return m;
+}
diff --git a/Modules/bz2module.c b/Modules/bz2module.c
deleted file mode 100644
index 3e55202..0000000
--- a/Modules/bz2module.c
+++ /dev/null
@@ -1,2180 +0,0 @@
-/*
-
-python-bz2 - python bz2 library interface
-
-Copyright (c) 2002 Gustavo Niemeyer <niemeyer@conectiva.com>
-Copyright (c) 2002 Python Software Foundation; All Rights Reserved
-
-*/
-
-#include "Python.h"
-#include <stdio.h>
-#include <bzlib.h>
-#include "structmember.h"
-
-#ifdef WITH_THREAD
-#include "pythread.h"
-#endif
-
-static char __author__[] =
-"The bz2 python module was written by:\n\
-\n\
- Gustavo Niemeyer <niemeyer@conectiva.com>\n\
-";
-
-/* Our very own off_t-like type, 64-bit if possible */
-/* copied from Objects/fileobject.c */
-#if !defined(HAVE_LARGEFILE_SUPPORT)
-typedef off_t Py_off_t;
-#elif SIZEOF_OFF_T >= 8
-typedef off_t Py_off_t;
-#elif SIZEOF_FPOS_T >= 8
-typedef fpos_t Py_off_t;
-#else
-#error "Large file support, but neither off_t nor fpos_t is large enough."
-#endif
-
-#define BUF(v) PyBytes_AS_STRING(v)
-
-#define MODE_CLOSED 0
-#define MODE_READ 1
-#define MODE_READ_EOF 2
-#define MODE_WRITE 3
-
-#define BZ2FileObject_Check(v) (Py_TYPE(v) == &BZ2File_Type)
-
-
-#ifdef BZ_CONFIG_ERROR
-
-#if SIZEOF_LONG >= 8
-#define BZS_TOTAL_OUT(bzs) \
- (((long)bzs->total_out_hi32 << 32) + bzs->total_out_lo32)
-#elif SIZEOF_LONG_LONG >= 8
-#define BZS_TOTAL_OUT(bzs) \
- (((PY_LONG_LONG)bzs->total_out_hi32 << 32) + bzs->total_out_lo32)
-#else
-#define BZS_TOTAL_OUT(bzs) \
- bzs->total_out_lo32
-#endif
-
-#else /* ! BZ_CONFIG_ERROR */
-
-#define BZ2_bzRead bzRead
-#define BZ2_bzReadOpen bzReadOpen
-#define BZ2_bzReadClose bzReadClose
-#define BZ2_bzWrite bzWrite
-#define BZ2_bzWriteOpen bzWriteOpen
-#define BZ2_bzWriteClose bzWriteClose
-#define BZ2_bzCompress bzCompress
-#define BZ2_bzCompressInit bzCompressInit
-#define BZ2_bzCompressEnd bzCompressEnd
-#define BZ2_bzDecompress bzDecompress
-#define BZ2_bzDecompressInit bzDecompressInit
-#define BZ2_bzDecompressEnd bzDecompressEnd
-
-#define BZS_TOTAL_OUT(bzs) bzs->total_out
-
-#endif /* ! BZ_CONFIG_ERROR */
-
-
-#ifdef WITH_THREAD
-#define ACQUIRE_LOCK(obj) do { \
- if (!PyThread_acquire_lock(obj->lock, 0)) { \
- Py_BEGIN_ALLOW_THREADS \
- PyThread_acquire_lock(obj->lock, 1); \
- Py_END_ALLOW_THREADS \
- } } while(0)
-#define RELEASE_LOCK(obj) PyThread_release_lock(obj->lock)
-#else
-#define ACQUIRE_LOCK(obj)
-#define RELEASE_LOCK(obj)
-#endif
-
-/* Bits in f_newlinetypes */
-#define NEWLINE_UNKNOWN 0 /* No newline seen, yet */
-#define NEWLINE_CR 1 /* \r newline seen */
-#define NEWLINE_LF 2 /* \n newline seen */
-#define NEWLINE_CRLF 4 /* \r\n newline seen */
-
-/* ===================================================================== */
-/* Structure definitions. */
-
-typedef struct {
- PyObject_HEAD
- FILE *rawfp;
-
- char* f_buf; /* Allocated readahead buffer */
- char* f_bufend; /* Points after last occupied position */
- char* f_bufptr; /* Current buffer position */
-
- BZFILE *fp;
- int mode;
- Py_off_t pos;
- Py_off_t size;
-#ifdef WITH_THREAD
- PyThread_type_lock lock;
-#endif
-} BZ2FileObject;
-
-typedef struct {
- PyObject_HEAD
- bz_stream bzs;
- int running;
-#ifdef WITH_THREAD
- PyThread_type_lock lock;
-#endif
-} BZ2CompObject;
-
-typedef struct {
- PyObject_HEAD
- bz_stream bzs;
- int running;
- PyObject *unused_data;
-#ifdef WITH_THREAD
- PyThread_type_lock lock;
-#endif
-} BZ2DecompObject;
-
-/* ===================================================================== */
-/* Utility functions. */
-
-/* Refuse regular I/O if there's data in the iteration-buffer.
- * Mixing them would cause data to arrive out of order, as the read*
- * methods don't use the iteration buffer. */
-static int
-check_iterbuffered(BZ2FileObject *f)
-{
- if (f->f_buf != NULL &&
- (f->f_bufend - f->f_bufptr) > 0 &&
- f->f_buf[0] != '\0') {
- PyErr_SetString(PyExc_ValueError,
- "Mixing iteration and read methods would lose data");
- return -1;
- }
- return 0;
-}
-
-static int
-Util_CatchBZ2Error(int bzerror)
-{
- int ret = 0;
- switch(bzerror) {
- case BZ_OK:
- case BZ_STREAM_END:
- break;
-
-#ifdef BZ_CONFIG_ERROR
- case BZ_CONFIG_ERROR:
- PyErr_SetString(PyExc_SystemError,
- "the bz2 library was not compiled "
- "correctly");
- ret = 1;
- break;
-#endif
-
- case BZ_PARAM_ERROR:
- PyErr_SetString(PyExc_ValueError,
- "the bz2 library has received wrong "
- "parameters");
- ret = 1;
- break;
-
- case BZ_MEM_ERROR:
- PyErr_NoMemory();
- ret = 1;
- break;
-
- case BZ_DATA_ERROR:
- case BZ_DATA_ERROR_MAGIC:
- PyErr_SetString(PyExc_IOError, "invalid data stream");
- ret = 1;
- break;
-
- case BZ_IO_ERROR:
- PyErr_SetString(PyExc_IOError, "unknown IO error");
- ret = 1;
- break;
-
- case BZ_UNEXPECTED_EOF:
- PyErr_SetString(PyExc_EOFError,
- "compressed file ended before the "
- "logical end-of-stream was detected");
- ret = 1;
- break;
-
- case BZ_SEQUENCE_ERROR:
- PyErr_SetString(PyExc_RuntimeError,
- "wrong sequence of bz2 library "
- "commands used");
- ret = 1;
- break;
- }
- return ret;
-}
-
-#if BUFSIZ < 8192
-#define SMALLCHUNK 8192
-#else
-#define SMALLCHUNK BUFSIZ
-#endif
-
-#if SIZEOF_INT < 4
-#define BIGCHUNK (512 * 32)
-#else
-#define BIGCHUNK (512 * 1024)
-#endif
-
-/* This is a hacked version of Python's fileobject.c:new_buffersize(). */
-static size_t
-Util_NewBufferSize(size_t currentsize)
-{
- if (currentsize > SMALLCHUNK) {
- /* Keep doubling until we reach BIGCHUNK;
- then keep adding BIGCHUNK. */
- if (currentsize <= BIGCHUNK)
- return currentsize + currentsize;
- else
- return currentsize + BIGCHUNK;
- }
- return currentsize + SMALLCHUNK;
-}
-
-/* This is a hacked version of Python's fileobject.c:get_line(). */
-static PyObject *
-Util_GetLine(BZ2FileObject *f, int n)
-{
- char c;
- char *buf, *end;
- size_t total_v_size; /* total # of slots in buffer */
- size_t used_v_size; /* # used slots in buffer */
- size_t increment; /* amount to increment the buffer */
- PyObject *v;
- int bzerror;
- int bytes_read;
-
- total_v_size = n > 0 ? n : 100;
- v = PyBytes_FromStringAndSize((char *)NULL, total_v_size);
- if (v == NULL)
- return NULL;
-
- buf = BUF(v);
- end = buf + total_v_size;
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- do {
- bytes_read = BZ2_bzRead(&bzerror, f->fp, &c, 1);
- f->pos++;
- if (bytes_read == 0)
- break;
- *buf++ = c;
- } while (bzerror == BZ_OK && c != '\n' && buf != end);
- Py_END_ALLOW_THREADS
- if (bzerror == BZ_STREAM_END) {
- f->size = f->pos;
- f->mode = MODE_READ_EOF;
- break;
- } else if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- Py_DECREF(v);
- return NULL;
- }
- if (c == '\n')
- break;
- /* Must be because buf == end */
- if (n > 0)
- break;
- used_v_size = total_v_size;
- increment = total_v_size >> 2; /* mild exponential growth */
- total_v_size += increment;
- if (total_v_size > INT_MAX) {
- PyErr_SetString(PyExc_OverflowError,
- "line is longer than a Python string can hold");
- Py_DECREF(v);
- return NULL;
- }
- if (_PyBytes_Resize(&v, total_v_size) < 0) {
- return NULL;
- }
- buf = BUF(v) + used_v_size;
- end = BUF(v) + total_v_size;
- }
-
- used_v_size = buf - BUF(v);
- if (used_v_size != total_v_size) {
- if (_PyBytes_Resize(&v, used_v_size) < 0) {
- v = NULL;
- }
- }
- return v;
-}
-
-/* This is a hacked version of Python's fileobject.c:drop_readahead(). */
-static void
-Util_DropReadAhead(BZ2FileObject *f)
-{
- if (f->f_buf != NULL) {
- PyMem_Free(f->f_buf);
- f->f_buf = NULL;
- }
-}
-
-/* This is a hacked version of Python's fileobject.c:readahead(). */
-static int
-Util_ReadAhead(BZ2FileObject *f, int bufsize)
-{
- int chunksize;
- int bzerror;
-
- if (f->f_buf != NULL) {
- if((f->f_bufend - f->f_bufptr) >= 1)
- return 0;
- else
- Util_DropReadAhead(f);
- }
- if (f->mode == MODE_READ_EOF) {
- f->f_bufptr = f->f_buf;
- f->f_bufend = f->f_buf;
- return 0;
- }
- if ((f->f_buf = PyMem_Malloc(bufsize)) == NULL) {
- PyErr_NoMemory();
- return -1;
- }
- Py_BEGIN_ALLOW_THREADS
- chunksize = BZ2_bzRead(&bzerror, f->fp, f->f_buf, bufsize);
- Py_END_ALLOW_THREADS
- f->pos += chunksize;
- if (bzerror == BZ_STREAM_END) {
- f->size = f->pos;
- f->mode = MODE_READ_EOF;
- } else if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- Util_DropReadAhead(f);
- return -1;
- }
- f->f_bufptr = f->f_buf;
- f->f_bufend = f->f_buf + chunksize;
- return 0;
-}
-
-/* This is a hacked version of Python's
- * fileobject.c:readahead_get_line_skip(). */
-static PyBytesObject *
-Util_ReadAheadGetLineSkip(BZ2FileObject *f, int skip, int bufsize)
-{
- PyBytesObject* s;
- char *bufptr;
- char *buf;
- int len;
-
- if (f->f_buf == NULL)
- if (Util_ReadAhead(f, bufsize) < 0)
- return NULL;
-
- len = f->f_bufend - f->f_bufptr;
- if (len == 0)
- return (PyBytesObject *)
- PyBytes_FromStringAndSize(NULL, skip);
- bufptr = memchr(f->f_bufptr, '\n', len);
- if (bufptr != NULL) {
- bufptr++; /* Count the '\n' */
- len = bufptr - f->f_bufptr;
- s = (PyBytesObject *)
- PyBytes_FromStringAndSize(NULL, skip+len);
- if (s == NULL)
- return NULL;
- memcpy(PyBytes_AS_STRING(s)+skip, f->f_bufptr, len);
- f->f_bufptr = bufptr;
- if (bufptr == f->f_bufend)
- Util_DropReadAhead(f);
- } else {
- bufptr = f->f_bufptr;
- buf = f->f_buf;
- f->f_buf = NULL; /* Force new readahead buffer */
- s = Util_ReadAheadGetLineSkip(f, skip+len,
- bufsize + (bufsize>>2));
- if (s == NULL) {
- PyMem_Free(buf);
- return NULL;
- }
- memcpy(PyBytes_AS_STRING(s)+skip, bufptr, len);
- PyMem_Free(buf);
- }
- return s;
-}
-
-/* ===================================================================== */
-/* Methods of BZ2File. */
-
-PyDoc_STRVAR(BZ2File_read__doc__,
-"read([size]) -> string\n\
-\n\
-Read at most size uncompressed bytes, returned as a string. If the size\n\
-argument is negative or omitted, read until EOF is reached.\n\
-");
-
-/* This is a hacked version of Python's fileobject.c:file_read(). */
-static PyObject *
-BZ2File_read(BZ2FileObject *self, PyObject *args)
-{
- long bytesrequested = -1;
- size_t bytesread, buffersize, chunksize;
- int bzerror;
- PyObject *ret = NULL;
-
- if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested))
- return NULL;
-
- ACQUIRE_LOCK(self);
- switch (self->mode) {
- case MODE_READ:
- break;
- case MODE_READ_EOF:
- ret = PyBytes_FromStringAndSize("", 0);
- goto cleanup;
- case MODE_CLOSED:
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto cleanup;
- default:
- PyErr_SetString(PyExc_IOError,
- "file is not ready for reading");
- goto cleanup;
- }
-
- /* refuse to mix with f.next() */
- if (check_iterbuffered(self))
- goto cleanup;
-
- if (bytesrequested < 0)
- buffersize = Util_NewBufferSize((size_t)0);
- else
- buffersize = bytesrequested;
- if (buffersize > INT_MAX) {
- PyErr_SetString(PyExc_OverflowError,
- "requested number of bytes is "
- "more than a Python string can hold");
- goto cleanup;
- }
- ret = PyBytes_FromStringAndSize((char *)NULL, buffersize);
- if (ret == NULL || buffersize == 0)
- goto cleanup;
- bytesread = 0;
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- chunksize = BZ2_bzRead(&bzerror, self->fp,
- BUF(ret)+bytesread,
- buffersize-bytesread);
- self->pos += chunksize;
- Py_END_ALLOW_THREADS
- bytesread += chunksize;
- if (bzerror == BZ_STREAM_END) {
- self->size = self->pos;
- self->mode = MODE_READ_EOF;
- break;
- } else if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- Py_DECREF(ret);
- ret = NULL;
- goto cleanup;
- }
- if (bytesrequested < 0) {
- buffersize = Util_NewBufferSize(buffersize);
- if (_PyBytes_Resize(&ret, buffersize) < 0) {
- ret = NULL;
- goto cleanup;
- }
- } else {
- break;
- }
- }
- if (bytesread != buffersize) {
- if (_PyBytes_Resize(&ret, bytesread) < 0) {
- ret = NULL;
- }
- }
-
-cleanup:
- RELEASE_LOCK(self);
- return ret;
-}
-
-PyDoc_STRVAR(BZ2File_readline__doc__,
-"readline([size]) -> string\n\
-\n\
-Return the next line from the file, as a string, retaining newline.\n\
-A non-negative size argument will limit the maximum number of bytes to\n\
-return (an incomplete line may be returned then). Return an empty\n\
-string at EOF.\n\
-");
-
-static PyObject *
-BZ2File_readline(BZ2FileObject *self, PyObject *args)
-{
- PyObject *ret = NULL;
- int sizehint = -1;
-
- if (!PyArg_ParseTuple(args, "|i:readline", &sizehint))
- return NULL;
-
- ACQUIRE_LOCK(self);
- switch (self->mode) {
- case MODE_READ:
- break;
- case MODE_READ_EOF:
- ret = PyBytes_FromStringAndSize("", 0);
- goto cleanup;
- case MODE_CLOSED:
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto cleanup;
- default:
- PyErr_SetString(PyExc_IOError,
- "file is not ready for reading");
- goto cleanup;
- }
-
- /* refuse to mix with f.next() */
- if (check_iterbuffered(self))
- goto cleanup;
-
- if (sizehint == 0)
- ret = PyBytes_FromStringAndSize("", 0);
- else
- ret = Util_GetLine(self, (sizehint < 0) ? 0 : sizehint);
-
-cleanup:
- RELEASE_LOCK(self);
- return ret;
-}
-
-PyDoc_STRVAR(BZ2File_readlines__doc__,
-"readlines([size]) -> list\n\
-\n\
-Call readline() repeatedly and return a list of lines read.\n\
-The optional size argument, if given, is an approximate bound on the\n\
-total number of bytes in the lines returned.\n\
-");
-
-/* This is a hacked version of Python's fileobject.c:file_readlines(). */
-static PyObject *
-BZ2File_readlines(BZ2FileObject *self, PyObject *args)
-{
- long sizehint = 0;
- PyObject *list = NULL;
- PyObject *line;
- char small_buffer[SMALLCHUNK];
- char *buffer = small_buffer;
- size_t buffersize = SMALLCHUNK;
- PyObject *big_buffer = NULL;
- size_t nfilled = 0;
- size_t nread;
- size_t totalread = 0;
- char *p, *q, *end;
- int err;
- int shortread = 0;
- int bzerror;
-
- if (!PyArg_ParseTuple(args, "|l:readlines", &sizehint))
- return NULL;
-
- ACQUIRE_LOCK(self);
- switch (self->mode) {
- case MODE_READ:
- break;
- case MODE_READ_EOF:
- list = PyList_New(0);
- goto cleanup;
- case MODE_CLOSED:
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto cleanup;
- default:
- PyErr_SetString(PyExc_IOError,
- "file is not ready for reading");
- goto cleanup;
- }
-
- /* refuse to mix with f.next() */
- if (check_iterbuffered(self))
- goto cleanup;
-
- if ((list = PyList_New(0)) == NULL)
- goto cleanup;
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- nread = BZ2_bzRead(&bzerror, self->fp,
- buffer+nfilled, buffersize-nfilled);
- self->pos += nread;
- Py_END_ALLOW_THREADS
- if (bzerror == BZ_STREAM_END) {
- self->size = self->pos;
- self->mode = MODE_READ_EOF;
- if (nread == 0) {
- sizehint = 0;
- break;
- }
- shortread = 1;
- } else if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- error:
- Py_DECREF(list);
- list = NULL;
- goto cleanup;
- }
- totalread += nread;
- p = memchr(buffer+nfilled, '\n', nread);
- if (!shortread && p == NULL) {
- /* Need a larger buffer to fit this line */
- nfilled += nread;
- buffersize *= 2;
- if (buffersize > INT_MAX) {
- PyErr_SetString(PyExc_OverflowError,
- "line is longer than a Python string can hold");
- goto error;
- }
- if (big_buffer == NULL) {
- /* Create the big buffer */
- big_buffer = PyBytes_FromStringAndSize(
- NULL, buffersize);
- if (big_buffer == NULL)
- goto error;
- buffer = PyBytes_AS_STRING(big_buffer);
- memcpy(buffer, small_buffer, nfilled);
- }
- else {
- /* Grow the big buffer */
- if (_PyBytes_Resize(&big_buffer, buffersize) < 0){
- big_buffer = NULL;
- goto error;
- }
- buffer = PyBytes_AS_STRING(big_buffer);
- }
- continue;
- }
- end = buffer+nfilled+nread;
- q = buffer;
- while (p != NULL) {
- /* Process complete lines */
- p++;
- line = PyBytes_FromStringAndSize(q, p-q);
- if (line == NULL)
- goto error;
- err = PyList_Append(list, line);
- Py_DECREF(line);
- if (err != 0)
- goto error;
- q = p;
- p = memchr(q, '\n', end-q);
- }
- /* Move the remaining incomplete line to the start */
- nfilled = end-q;
- memmove(buffer, q, nfilled);
- if (sizehint > 0)
- if (totalread >= (size_t)sizehint)
- break;
- if (shortread) {
- sizehint = 0;
- break;
- }
- }
- if (nfilled != 0) {
- /* Partial last line */
- line = PyBytes_FromStringAndSize(buffer, nfilled);
- if (line == NULL)
- goto error;
- if (sizehint > 0) {
- /* Need to complete the last line */
- PyObject *rest = Util_GetLine(self, 0);
- if (rest == NULL) {
- Py_DECREF(line);
- goto error;
- }
- PyBytes_Concat(&line, rest);
- Py_DECREF(rest);
- if (line == NULL)
- goto error;
- }
- err = PyList_Append(list, line);
- Py_DECREF(line);
- if (err != 0)
- goto error;
- }
-
- cleanup:
- RELEASE_LOCK(self);
- if (big_buffer) {
- Py_DECREF(big_buffer);
- }
- return list;
-}
-
-PyDoc_STRVAR(BZ2File_write__doc__,
-"write(data) -> None\n\
-\n\
-Write the 'data' string to file. Note that due to buffering, close() may\n\
-be needed before the file on disk reflects the data written.\n\
-");
-
-/* This is a hacked version of Python's fileobject.c:file_write(). */
-static PyObject *
-BZ2File_write(BZ2FileObject *self, PyObject *args)
-{
- PyObject *ret = NULL;
- Py_buffer pbuf;
- char *buf;
- int len;
- int bzerror;
-
- if (!PyArg_ParseTuple(args, "y*:write", &pbuf))
- return NULL;
- buf = pbuf.buf;
- len = pbuf.len;
-
- ACQUIRE_LOCK(self);
- switch (self->mode) {
- case MODE_WRITE:
- break;
-
- case MODE_CLOSED:
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto cleanup;
-
- default:
- PyErr_SetString(PyExc_IOError,
- "file is not ready for writing");
- goto cleanup;
- }
-
- Py_BEGIN_ALLOW_THREADS
- BZ2_bzWrite (&bzerror, self->fp, buf, len);
- self->pos += len;
- Py_END_ALLOW_THREADS
-
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto cleanup;
- }
-
- Py_INCREF(Py_None);
- ret = Py_None;
-
-cleanup:
- PyBuffer_Release(&pbuf);
- RELEASE_LOCK(self);
- return ret;
-}
-
-PyDoc_STRVAR(BZ2File_writelines__doc__,
-"writelines(sequence_of_strings) -> None\n\
-\n\
-Write the sequence of strings to the file. Note that newlines are not\n\
-added. The sequence can be any iterable object producing strings. This is\n\
-equivalent to calling write() for each string.\n\
-");
-
-/* This is a hacked version of Python's fileobject.c:file_writelines(). */
-static PyObject *
-BZ2File_writelines(BZ2FileObject *self, PyObject *seq)
-{
-#define CHUNKSIZE 1000
- PyObject *list = NULL;
- PyObject *iter = NULL;
- PyObject *ret = NULL;
- PyObject *line;
- int i, j, index, len, islist;
- int bzerror;
-
- ACQUIRE_LOCK(self);
- switch (self->mode) {
- case MODE_WRITE:
- break;
-
- case MODE_CLOSED:
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto error;
-
- default:
- PyErr_SetString(PyExc_IOError,
- "file is not ready for writing");
- goto error;
- }
-
- islist = PyList_Check(seq);
- if (!islist) {
- iter = PyObject_GetIter(seq);
- if (iter == NULL) {
- PyErr_SetString(PyExc_TypeError,
- "writelines() requires an iterable argument");
- goto error;
- }
- list = PyList_New(CHUNKSIZE);
- if (list == NULL)
- goto error;
- }
-
- /* Strategy: slurp CHUNKSIZE lines into a private list,
- checking that they are all strings, then write that list
- without holding the interpreter lock, then come back for more. */
- for (index = 0; ; index += CHUNKSIZE) {
- if (islist) {
- Py_XDECREF(list);
- list = PyList_GetSlice(seq, index, index+CHUNKSIZE);
- if (list == NULL)
- goto error;
- j = PyList_GET_SIZE(list);
- }
- else {
- for (j = 0; j < CHUNKSIZE; j++) {
- line = PyIter_Next(iter);
- if (line == NULL) {
- if (PyErr_Occurred())
- goto error;
- break;
- }
- PyList_SetItem(list, j, line);
- }
- }
- if (j == 0)
- break;
-
- /* Check that all entries are indeed byte strings. If not,
- apply the same rules as for file.write() and
- convert the rets to strings. This is slow, but
- seems to be the only way since all conversion APIs
- could potentially execute Python code. */
- for (i = 0; i < j; i++) {
- PyObject *v = PyList_GET_ITEM(list, i);
- if (!PyBytes_Check(v)) {
- const char *buffer;
- Py_ssize_t len;
- if (PyObject_AsCharBuffer(v, &buffer, &len)) {
- PyErr_SetString(PyExc_TypeError,
- "writelines() "
- "argument must be "
- "a sequence of "
- "bytes objects");
- goto error;
- }
- line = PyBytes_FromStringAndSize(buffer,
- len);
- if (line == NULL)
- goto error;
- Py_DECREF(v);
- PyList_SET_ITEM(list, i, line);
- }
- }
-
- /* Since we are releasing the global lock, the
- following code may *not* execute Python code. */
- Py_BEGIN_ALLOW_THREADS
- for (i = 0; i < j; i++) {
- line = PyList_GET_ITEM(list, i);
- len = PyBytes_GET_SIZE(line);
- BZ2_bzWrite (&bzerror, self->fp,
- PyBytes_AS_STRING(line), len);
- if (bzerror != BZ_OK) {
- Py_BLOCK_THREADS
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
- }
- Py_END_ALLOW_THREADS
-
- if (j < CHUNKSIZE)
- break;
- }
-
- Py_INCREF(Py_None);
- ret = Py_None;
-
- error:
- RELEASE_LOCK(self);
- Py_XDECREF(list);
- Py_XDECREF(iter);
- return ret;
-#undef CHUNKSIZE
-}
-
-PyDoc_STRVAR(BZ2File_seek__doc__,
-"seek(offset [, whence]) -> None\n\
-\n\
-Move to new file position. Argument offset is a byte count. Optional\n\
-argument whence defaults to 0 (offset from start of file, offset\n\
-should be >= 0); other values are 1 (move relative to current position,\n\
-positive or negative), and 2 (move relative to end of file, usually\n\
-negative, although many platforms allow seeking beyond the end of a file).\n\
-\n\
-Note that seeking of bz2 files is emulated, and depending on the parameters\n\
-the operation may be extremely slow.\n\
-");
-
-static PyObject *
-BZ2File_seek(BZ2FileObject *self, PyObject *args)
-{
- int where = 0;
- PyObject *offobj;
- Py_off_t offset;
- char small_buffer[SMALLCHUNK];
- char *buffer = small_buffer;
- size_t buffersize = SMALLCHUNK;
- Py_off_t bytesread = 0;
- size_t readsize;
- int chunksize;
- int bzerror;
- PyObject *ret = NULL;
-
- if (!PyArg_ParseTuple(args, "O|i:seek", &offobj, &where))
- return NULL;
-#if !defined(HAVE_LARGEFILE_SUPPORT)
- offset = PyLong_AsLong(offobj);
-#else
- offset = PyLong_Check(offobj) ?
- PyLong_AsLongLong(offobj) : PyLong_AsLong(offobj);
-#endif
- if (PyErr_Occurred())
- return NULL;
-
- ACQUIRE_LOCK(self);
- Util_DropReadAhead(self);
- switch (self->mode) {
- case MODE_READ:
- case MODE_READ_EOF:
- break;
-
- case MODE_CLOSED:
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto cleanup;
-
- default:
- PyErr_SetString(PyExc_IOError,
- "seek works only while reading");
- goto cleanup;
- }
-
- if (where == 2) {
- if (self->size == -1) {
- assert(self->mode != MODE_READ_EOF);
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- chunksize = BZ2_bzRead(&bzerror, self->fp,
- buffer, buffersize);
- self->pos += chunksize;
- Py_END_ALLOW_THREADS
-
- bytesread += chunksize;
- if (bzerror == BZ_STREAM_END) {
- break;
- } else if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto cleanup;
- }
- }
- self->mode = MODE_READ_EOF;
- self->size = self->pos;
- bytesread = 0;
- }
- offset = self->size + offset;
- } else if (where == 1) {
- offset = self->pos + offset;
- }
-
- /* Before getting here, offset must be the absolute position the file
- * pointer should be set to. */
-
- if (offset >= self->pos) {
- /* we can move forward */
- offset -= self->pos;
- } else {
- /* we cannot move back, so rewind the stream */
- BZ2_bzReadClose(&bzerror, self->fp);
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto cleanup;
- }
- rewind(self->rawfp);
- self->pos = 0;
- self->fp = BZ2_bzReadOpen(&bzerror, self->rawfp,
- 0, 0, NULL, 0);
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto cleanup;
- }
- self->mode = MODE_READ;
- }
-
- if (offset <= 0 || self->mode == MODE_READ_EOF)
- goto exit;
-
- /* Before getting here, offset must be set to the number of bytes
- * to walk forward. */
- for (;;) {
- if (offset-bytesread > buffersize)
- readsize = buffersize;
- else
- /* offset might be wider that readsize, but the result
- * of the subtraction is bound by buffersize (see the
- * condition above). buffersize is 8192. */
- readsize = (size_t)(offset-bytesread);
- Py_BEGIN_ALLOW_THREADS
- chunksize = BZ2_bzRead(&bzerror, self->fp, buffer, readsize);
- self->pos += chunksize;
- Py_END_ALLOW_THREADS
- bytesread += chunksize;
- if (bzerror == BZ_STREAM_END) {
- self->size = self->pos;
- self->mode = MODE_READ_EOF;
- break;
- } else if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto cleanup;
- }
- if (bytesread == offset)
- break;
- }
-
-exit:
- Py_INCREF(Py_None);
- ret = Py_None;
-
-cleanup:
- RELEASE_LOCK(self);
- return ret;
-}
-
-PyDoc_STRVAR(BZ2File_tell__doc__,
-"tell() -> int\n\
-\n\
-Return the current file position, an integer (may be a long integer).\n\
-");
-
-static PyObject *
-BZ2File_tell(BZ2FileObject *self, PyObject *args)
-{
- PyObject *ret = NULL;
-
- if (self->mode == MODE_CLOSED) {
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- goto cleanup;
- }
-
-#if !defined(HAVE_LARGEFILE_SUPPORT)
- ret = PyLong_FromLong(self->pos);
-#else
- ret = PyLong_FromLongLong(self->pos);
-#endif
-
-cleanup:
- return ret;
-}
-
-PyDoc_STRVAR(BZ2File_close__doc__,
-"close() -> None or (perhaps) an integer\n\
-\n\
-Close the file. Sets data attribute .closed to true. A closed file\n\
-cannot be used for further I/O operations. close() may be called more\n\
-than once without error.\n\
-");
-
-static PyObject *
-BZ2File_close(BZ2FileObject *self)
-{
- PyObject *ret = NULL;
- int bzerror = BZ_OK;
-
- if (self->mode == MODE_CLOSED) {
- Py_RETURN_NONE;
- }
-
- ACQUIRE_LOCK(self);
- switch (self->mode) {
- case MODE_READ:
- case MODE_READ_EOF:
- BZ2_bzReadClose(&bzerror, self->fp);
- break;
- case MODE_WRITE:
- BZ2_bzWriteClose(&bzerror, self->fp,
- 0, NULL, NULL);
- break;
- }
- self->mode = MODE_CLOSED;
- fclose(self->rawfp);
- self->rawfp = NULL;
- if (bzerror == BZ_OK) {
- Py_INCREF(Py_None);
- ret = Py_None;
- }
- else {
- Util_CatchBZ2Error(bzerror);
- }
-
- RELEASE_LOCK(self);
- return ret;
-}
-
-PyDoc_STRVAR(BZ2File_enter_doc,
-"__enter__() -> self.");
-
-static PyObject *
-BZ2File_enter(BZ2FileObject *self)
-{
- if (self->mode == MODE_CLOSED) {
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- return NULL;
- }
- Py_INCREF(self);
- return (PyObject *) self;
-}
-
-PyDoc_STRVAR(BZ2File_exit_doc,
-"__exit__(*excinfo) -> None. Closes the file.");
-
-static PyObject *
-BZ2File_exit(BZ2FileObject *self, PyObject *args)
-{
- PyObject *ret = PyObject_CallMethod((PyObject *) self, "close", NULL);
- if (!ret)
- /* If error occurred, pass through */
- return NULL;
- Py_DECREF(ret);
- Py_RETURN_NONE;
-}
-
-
-static PyObject *BZ2File_getiter(BZ2FileObject *self);
-
-static PyMethodDef BZ2File_methods[] = {
- {"read", (PyCFunction)BZ2File_read, METH_VARARGS, BZ2File_read__doc__},
- {"readline", (PyCFunction)BZ2File_readline, METH_VARARGS, BZ2File_readline__doc__},
- {"readlines", (PyCFunction)BZ2File_readlines, METH_VARARGS, BZ2File_readlines__doc__},
- {"write", (PyCFunction)BZ2File_write, METH_VARARGS, BZ2File_write__doc__},
- {"writelines", (PyCFunction)BZ2File_writelines, METH_O, BZ2File_writelines__doc__},
- {"seek", (PyCFunction)BZ2File_seek, METH_VARARGS, BZ2File_seek__doc__},
- {"tell", (PyCFunction)BZ2File_tell, METH_NOARGS, BZ2File_tell__doc__},
- {"close", (PyCFunction)BZ2File_close, METH_NOARGS, BZ2File_close__doc__},
- {"__enter__", (PyCFunction)BZ2File_enter, METH_NOARGS, BZ2File_enter_doc},
- {"__exit__", (PyCFunction)BZ2File_exit, METH_VARARGS, BZ2File_exit_doc},
- {NULL, NULL} /* sentinel */
-};
-
-
-/* ===================================================================== */
-/* Getters and setters of BZ2File. */
-
-static PyObject *
-BZ2File_get_closed(BZ2FileObject *self, void *closure)
-{
- return PyLong_FromLong(self->mode == MODE_CLOSED);
-}
-
-static PyGetSetDef BZ2File_getset[] = {
- {"closed", (getter)BZ2File_get_closed, NULL,
- "True if the file is closed"},
- {NULL} /* Sentinel */
-};
-
-
-/* ===================================================================== */
-/* Slot definitions for BZ2File_Type. */
-
-static int
-BZ2File_init(BZ2FileObject *self, PyObject *args, PyObject *kwargs)
-{
- static char *kwlist[] = {"filename", "mode", "buffering",
- "compresslevel", 0};
- PyObject *name_obj = NULL;
- char *name;
- char *mode = "r";
- int buffering = -1;
- int compresslevel = 9;
- int bzerror;
- int mode_char = 0;
-
- self->size = -1;
-
- if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O&|sii:BZ2File",
- kwlist, PyUnicode_FSConverter, &name_obj,
- &mode, &buffering,
- &compresslevel))
- return -1;
-
- name = PyBytes_AsString(name_obj);
- if (compresslevel < 1 || compresslevel > 9) {
- PyErr_SetString(PyExc_ValueError,
- "compresslevel must be between 1 and 9");
- Py_DECREF(name_obj);
- return -1;
- }
-
- for (;;) {
- int error = 0;
- switch (*mode) {
- case 'r':
- case 'w':
- if (mode_char)
- error = 1;
- mode_char = *mode;
- break;
-
- case 'b':
- break;
-
- default:
- error = 1;
- break;
- }
- if (error) {
- PyErr_Format(PyExc_ValueError,
- "invalid mode char %c", *mode);
- Py_DECREF(name_obj);
- return -1;
- }
- mode++;
- if (*mode == '\0')
- break;
- }
-
- if (mode_char == 0) {
- mode_char = 'r';
- }
-
- mode = (mode_char == 'r') ? "rb" : "wb";
-
- self->rawfp = fopen(name, mode);
- Py_DECREF(name_obj);
- if (self->rawfp == NULL) {
- PyErr_SetFromErrno(PyExc_IOError);
- return -1;
- }
- /* XXX Ignore buffering */
-
- /* From now on, we have stuff to dealloc, so jump to error label
- * instead of returning */
-
-#ifdef WITH_THREAD
- self->lock = PyThread_allocate_lock();
- if (!self->lock) {
- PyErr_SetString(PyExc_MemoryError, "unable to allocate lock");
- goto error;
- }
-#endif
-
- if (mode_char == 'r')
- self->fp = BZ2_bzReadOpen(&bzerror, self->rawfp,
- 0, 0, NULL, 0);
- else
- self->fp = BZ2_bzWriteOpen(&bzerror, self->rawfp,
- compresslevel, 0, 0);
-
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
-
- self->mode = (mode_char == 'r') ? MODE_READ : MODE_WRITE;
-
- return 0;
-
-error:
- fclose(self->rawfp);
- self->rawfp = NULL;
-#ifdef WITH_THREAD
- if (self->lock) {
- PyThread_free_lock(self->lock);
- self->lock = NULL;
- }
-#endif
- return -1;
-}
-
-static void
-BZ2File_dealloc(BZ2FileObject *self)
-{
- int bzerror;
-#ifdef WITH_THREAD
- if (self->lock)
- PyThread_free_lock(self->lock);
-#endif
- switch (self->mode) {
- case MODE_READ:
- case MODE_READ_EOF:
- BZ2_bzReadClose(&bzerror, self->fp);
- break;
- case MODE_WRITE:
- BZ2_bzWriteClose(&bzerror, self->fp,
- 0, NULL, NULL);
- break;
- }
- Util_DropReadAhead(self);
- if (self->rawfp != NULL)
- fclose(self->rawfp);
- Py_TYPE(self)->tp_free((PyObject *)self);
-}
-
-/* This is a hacked version of Python's fileobject.c:file_getiter(). */
-static PyObject *
-BZ2File_getiter(BZ2FileObject *self)
-{
- if (self->mode == MODE_CLOSED) {
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- return NULL;
- }
- Py_INCREF((PyObject*)self);
- return (PyObject *)self;
-}
-
-/* This is a hacked version of Python's fileobject.c:file_iternext(). */
-#define READAHEAD_BUFSIZE 8192
-static PyObject *
-BZ2File_iternext(BZ2FileObject *self)
-{
- PyBytesObject* ret;
- ACQUIRE_LOCK(self);
- if (self->mode == MODE_CLOSED) {
- RELEASE_LOCK(self);
- PyErr_SetString(PyExc_ValueError,
- "I/O operation on closed file");
- return NULL;
- }
- ret = Util_ReadAheadGetLineSkip(self, 0, READAHEAD_BUFSIZE);
- RELEASE_LOCK(self);
- if (ret == NULL || PyBytes_GET_SIZE(ret) == 0) {
- Py_XDECREF(ret);
- return NULL;
- }
- return (PyObject *)ret;
-}
-
-/* ===================================================================== */
-/* BZ2File_Type definition. */
-
-PyDoc_VAR(BZ2File__doc__) =
-PyDoc_STR(
-"BZ2File(name [, mode='r', buffering=0, compresslevel=9]) -> file object\n\
-\n\
-Open a bz2 file. The mode can be 'r' or 'w', for reading (default) or\n\
-writing. When opened for writing, the file will be created if it doesn't\n\
-exist, and truncated otherwise. If the buffering argument is given, 0 means\n\
-unbuffered, and larger numbers specify the buffer size. If compresslevel\n\
-is given, must be a number between 1 and 9.\n\
-Data read is always returned in bytes; data written ought to be bytes.\n\
-");
-
-static PyTypeObject BZ2File_Type = {
- PyVarObject_HEAD_INIT(NULL, 0)
- "bz2.BZ2File", /*tp_name*/
- sizeof(BZ2FileObject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- (destructor)BZ2File_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_reserved*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- PyObject_GenericGetAttr,/*tp_getattro*/
- PyObject_GenericSetAttr,/*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
- BZ2File__doc__, /*tp_doc*/
- 0, /*tp_traverse*/
- 0, /*tp_clear*/
- 0, /*tp_richcompare*/
- 0, /*tp_weaklistoffset*/
- (getiterfunc)BZ2File_getiter, /*tp_iter*/
- (iternextfunc)BZ2File_iternext, /*tp_iternext*/
- BZ2File_methods, /*tp_methods*/
- 0, /*tp_members*/
- BZ2File_getset, /*tp_getset*/
- 0, /*tp_base*/
- 0, /*tp_dict*/
- 0, /*tp_descr_get*/
- 0, /*tp_descr_set*/
- 0, /*tp_dictoffset*/
- (initproc)BZ2File_init, /*tp_init*/
- PyType_GenericAlloc, /*tp_alloc*/
- PyType_GenericNew, /*tp_new*/
- PyObject_Free, /*tp_free*/
- 0, /*tp_is_gc*/
-};
-
-
-/* ===================================================================== */
-/* Methods of BZ2Comp. */
-
-PyDoc_STRVAR(BZ2Comp_compress__doc__,
-"compress(data) -> string\n\
-\n\
-Provide more data to the compressor object. It will return chunks of\n\
-compressed data whenever possible. When you've finished providing data\n\
-to compress, call the flush() method to finish the compression process,\n\
-and return what is left in the internal buffers.\n\
-");
-
-static PyObject *
-BZ2Comp_compress(BZ2CompObject *self, PyObject *args)
-{
- Py_buffer pdata;
- char *data;
- int datasize;
- int bufsize = SMALLCHUNK;
- PY_LONG_LONG totalout;
- PyObject *ret = NULL;
- bz_stream *bzs = &self->bzs;
- int bzerror;
-
- if (!PyArg_ParseTuple(args, "y*:compress", &pdata))
- return NULL;
- data = pdata.buf;
- datasize = pdata.len;
-
- if (datasize == 0) {
- PyBuffer_Release(&pdata);
- return PyBytes_FromStringAndSize("", 0);
- }
-
- ACQUIRE_LOCK(self);
- if (!self->running) {
- PyErr_SetString(PyExc_ValueError,
- "this object was already flushed");
- goto error;
- }
-
- ret = PyBytes_FromStringAndSize(NULL, bufsize);
- if (!ret)
- goto error;
-
- bzs->next_in = data;
- bzs->avail_in = datasize;
- bzs->next_out = BUF(ret);
- bzs->avail_out = bufsize;
-
- totalout = BZS_TOTAL_OUT(bzs);
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- bzerror = BZ2_bzCompress(bzs, BZ_RUN);
- Py_END_ALLOW_THREADS
- if (bzerror != BZ_RUN_OK) {
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
- if (bzs->avail_in == 0)
- break; /* no more input data */
- if (bzs->avail_out == 0) {
- bufsize = Util_NewBufferSize(bufsize);
- if (_PyBytes_Resize(&ret, bufsize) < 0) {
- BZ2_bzCompressEnd(bzs);
- goto error;
- }
- bzs->next_out = BUF(ret) + (BZS_TOTAL_OUT(bzs)
- - totalout);
- bzs->avail_out = bufsize - (bzs->next_out - BUF(ret));
- }
- }
-
- if (_PyBytes_Resize(&ret,
- (Py_ssize_t)(BZS_TOTAL_OUT(bzs) - totalout)) < 0)
- goto error;
-
- RELEASE_LOCK(self);
- PyBuffer_Release(&pdata);
- return ret;
-
-error:
- RELEASE_LOCK(self);
- PyBuffer_Release(&pdata);
- Py_XDECREF(ret);
- return NULL;
-}
-
-PyDoc_STRVAR(BZ2Comp_flush__doc__,
-"flush() -> string\n\
-\n\
-Finish the compression process and return what is left in internal buffers.\n\
-You must not use the compressor object after calling this method.\n\
-");
-
-static PyObject *
-BZ2Comp_flush(BZ2CompObject *self)
-{
- int bufsize = SMALLCHUNK;
- PyObject *ret = NULL;
- bz_stream *bzs = &self->bzs;
- PY_LONG_LONG totalout;
- int bzerror;
-
- ACQUIRE_LOCK(self);
- if (!self->running) {
- PyErr_SetString(PyExc_ValueError, "object was already "
- "flushed");
- goto error;
- }
- self->running = 0;
-
- ret = PyBytes_FromStringAndSize(NULL, bufsize);
- if (!ret)
- goto error;
-
- bzs->next_out = BUF(ret);
- bzs->avail_out = bufsize;
-
- totalout = BZS_TOTAL_OUT(bzs);
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- bzerror = BZ2_bzCompress(bzs, BZ_FINISH);
- Py_END_ALLOW_THREADS
- if (bzerror == BZ_STREAM_END) {
- break;
- } else if (bzerror != BZ_FINISH_OK) {
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
- if (bzs->avail_out == 0) {
- bufsize = Util_NewBufferSize(bufsize);
- if (_PyBytes_Resize(&ret, bufsize) < 0)
- goto error;
- bzs->next_out = BUF(ret);
- bzs->next_out = BUF(ret) + (BZS_TOTAL_OUT(bzs)
- - totalout);
- bzs->avail_out = bufsize - (bzs->next_out - BUF(ret));
- }
- }
-
- if (bzs->avail_out != 0) {
- if (_PyBytes_Resize(&ret,
- (Py_ssize_t)(BZS_TOTAL_OUT(bzs) - totalout)) < 0)
- goto error;
- }
-
- RELEASE_LOCK(self);
- return ret;
-
-error:
- RELEASE_LOCK(self);
- Py_XDECREF(ret);
- return NULL;
-}
-
-static PyMethodDef BZ2Comp_methods[] = {
- {"compress", (PyCFunction)BZ2Comp_compress, METH_VARARGS,
- BZ2Comp_compress__doc__},
- {"flush", (PyCFunction)BZ2Comp_flush, METH_NOARGS,
- BZ2Comp_flush__doc__},
- {NULL, NULL} /* sentinel */
-};
-
-
-/* ===================================================================== */
-/* Slot definitions for BZ2Comp_Type. */
-
-static int
-BZ2Comp_init(BZ2CompObject *self, PyObject *args, PyObject *kwargs)
-{
- int compresslevel = 9;
- int bzerror;
- static char *kwlist[] = {"compresslevel", 0};
-
- if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|i:BZ2Compressor",
- kwlist, &compresslevel))
- return -1;
-
- if (compresslevel < 1 || compresslevel > 9) {
- PyErr_SetString(PyExc_ValueError,
- "compresslevel must be between 1 and 9");
- goto error;
- }
-
-#ifdef WITH_THREAD
- self->lock = PyThread_allocate_lock();
- if (!self->lock) {
- PyErr_SetString(PyExc_MemoryError, "unable to allocate lock");
- goto error;
- }
-#endif
-
- memset(&self->bzs, 0, sizeof(bz_stream));
- bzerror = BZ2_bzCompressInit(&self->bzs, compresslevel, 0, 0);
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
-
- self->running = 1;
-
- return 0;
-error:
-#ifdef WITH_THREAD
- if (self->lock) {
- PyThread_free_lock(self->lock);
- self->lock = NULL;
- }
-#endif
- return -1;
-}
-
-static void
-BZ2Comp_dealloc(BZ2CompObject *self)
-{
-#ifdef WITH_THREAD
- if (self->lock)
- PyThread_free_lock(self->lock);
-#endif
- BZ2_bzCompressEnd(&self->bzs);
- Py_TYPE(self)->tp_free((PyObject *)self);
-}
-
-
-/* ===================================================================== */
-/* BZ2Comp_Type definition. */
-
-PyDoc_STRVAR(BZ2Comp__doc__,
-"BZ2Compressor([compresslevel=9]) -> compressor object\n\
-\n\
-Create a new compressor object. This object may be used to compress\n\
-data sequentially. If you want to compress data in one shot, use the\n\
-compress() function instead. The compresslevel parameter, if given,\n\
-must be a number between 1 and 9.\n\
-");
-
-static PyTypeObject BZ2Comp_Type = {
- PyVarObject_HEAD_INIT(NULL, 0)
- "bz2.BZ2Compressor", /*tp_name*/
- sizeof(BZ2CompObject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- (destructor)BZ2Comp_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_reserved*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- PyObject_GenericGetAttr,/*tp_getattro*/
- PyObject_GenericSetAttr,/*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
- BZ2Comp__doc__, /*tp_doc*/
- 0, /*tp_traverse*/
- 0, /*tp_clear*/
- 0, /*tp_richcompare*/
- 0, /*tp_weaklistoffset*/
- 0, /*tp_iter*/
- 0, /*tp_iternext*/
- BZ2Comp_methods, /*tp_methods*/
- 0, /*tp_members*/
- 0, /*tp_getset*/
- 0, /*tp_base*/
- 0, /*tp_dict*/
- 0, /*tp_descr_get*/
- 0, /*tp_descr_set*/
- 0, /*tp_dictoffset*/
- (initproc)BZ2Comp_init, /*tp_init*/
- PyType_GenericAlloc, /*tp_alloc*/
- PyType_GenericNew, /*tp_new*/
- PyObject_Free, /*tp_free*/
- 0, /*tp_is_gc*/
-};
-
-
-/* ===================================================================== */
-/* Members of BZ2Decomp. */
-
-#undef OFF
-#define OFF(x) offsetof(BZ2DecompObject, x)
-
-static PyMemberDef BZ2Decomp_members[] = {
- {"unused_data", T_OBJECT, OFF(unused_data), READONLY},
- {NULL} /* Sentinel */
-};
-
-
-/* ===================================================================== */
-/* Methods of BZ2Decomp. */
-
-PyDoc_STRVAR(BZ2Decomp_decompress__doc__,
-"decompress(data) -> string\n\
-\n\
-Provide more data to the decompressor object. It will return chunks\n\
-of decompressed data whenever possible. If you try to decompress data\n\
-after the end of stream is found, EOFError will be raised. If any data\n\
-was found after the end of stream, it'll be ignored and saved in\n\
-unused_data attribute.\n\
-");
-
-static PyObject *
-BZ2Decomp_decompress(BZ2DecompObject *self, PyObject *args)
-{
- Py_buffer pdata;
- char *data;
- int datasize;
- int bufsize = SMALLCHUNK;
- PY_LONG_LONG totalout;
- PyObject *ret = NULL;
- bz_stream *bzs = &self->bzs;
- int bzerror;
-
- if (!PyArg_ParseTuple(args, "y*:decompress", &pdata))
- return NULL;
- data = pdata.buf;
- datasize = pdata.len;
-
- ACQUIRE_LOCK(self);
- if (!self->running) {
- PyErr_SetString(PyExc_EOFError, "end of stream was "
- "already found");
- goto error;
- }
-
- ret = PyBytes_FromStringAndSize(NULL, bufsize);
- if (!ret)
- goto error;
-
- bzs->next_in = data;
- bzs->avail_in = datasize;
- bzs->next_out = BUF(ret);
- bzs->avail_out = bufsize;
-
- totalout = BZS_TOTAL_OUT(bzs);
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- bzerror = BZ2_bzDecompress(bzs);
- Py_END_ALLOW_THREADS
- if (bzerror == BZ_STREAM_END) {
- if (bzs->avail_in != 0) {
- Py_DECREF(self->unused_data);
- self->unused_data =
- PyBytes_FromStringAndSize(bzs->next_in,
- bzs->avail_in);
- }
- self->running = 0;
- break;
- }
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
- if (bzs->avail_in == 0)
- break; /* no more input data */
- if (bzs->avail_out == 0) {
- bufsize = Util_NewBufferSize(bufsize);
- if (_PyBytes_Resize(&ret, bufsize) < 0) {
- BZ2_bzDecompressEnd(bzs);
- goto error;
- }
- bzs->next_out = BUF(ret);
- bzs->next_out = BUF(ret) + (BZS_TOTAL_OUT(bzs)
- - totalout);
- bzs->avail_out = bufsize - (bzs->next_out - BUF(ret));
- }
- }
-
- if (bzs->avail_out != 0) {
- if (_PyBytes_Resize(&ret,
- (Py_ssize_t)(BZS_TOTAL_OUT(bzs) - totalout)) < 0)
- goto error;
- }
-
- RELEASE_LOCK(self);
- PyBuffer_Release(&pdata);
- return ret;
-
-error:
- RELEASE_LOCK(self);
- PyBuffer_Release(&pdata);
- Py_XDECREF(ret);
- return NULL;
-}
-
-static PyMethodDef BZ2Decomp_methods[] = {
- {"decompress", (PyCFunction)BZ2Decomp_decompress, METH_VARARGS, BZ2Decomp_decompress__doc__},
- {NULL, NULL} /* sentinel */
-};
-
-
-/* ===================================================================== */
-/* Slot definitions for BZ2Decomp_Type. */
-
-static int
-BZ2Decomp_init(BZ2DecompObject *self, PyObject *args, PyObject *kwargs)
-{
- int bzerror;
-
- if (!PyArg_ParseTuple(args, ":BZ2Decompressor"))
- return -1;
-
-#ifdef WITH_THREAD
- self->lock = PyThread_allocate_lock();
- if (!self->lock) {
- PyErr_SetString(PyExc_MemoryError, "unable to allocate lock");
- goto error;
- }
-#endif
-
- self->unused_data = PyBytes_FromStringAndSize("", 0);
- if (!self->unused_data)
- goto error;
-
- memset(&self->bzs, 0, sizeof(bz_stream));
- bzerror = BZ2_bzDecompressInit(&self->bzs, 0, 0);
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- goto error;
- }
-
- self->running = 1;
-
- return 0;
-
-error:
-#ifdef WITH_THREAD
- if (self->lock) {
- PyThread_free_lock(self->lock);
- self->lock = NULL;
- }
-#endif
- Py_CLEAR(self->unused_data);
- return -1;
-}
-
-static void
-BZ2Decomp_dealloc(BZ2DecompObject *self)
-{
-#ifdef WITH_THREAD
- if (self->lock)
- PyThread_free_lock(self->lock);
-#endif
- Py_XDECREF(self->unused_data);
- BZ2_bzDecompressEnd(&self->bzs);
- Py_TYPE(self)->tp_free((PyObject *)self);
-}
-
-
-/* ===================================================================== */
-/* BZ2Decomp_Type definition. */
-
-PyDoc_STRVAR(BZ2Decomp__doc__,
-"BZ2Decompressor() -> decompressor object\n\
-\n\
-Create a new decompressor object. This object may be used to decompress\n\
-data sequentially. If you want to decompress data in one shot, use the\n\
-decompress() function instead.\n\
-");
-
-static PyTypeObject BZ2Decomp_Type = {
- PyVarObject_HEAD_INIT(NULL, 0)
- "bz2.BZ2Decompressor", /*tp_name*/
- sizeof(BZ2DecompObject), /*tp_basicsize*/
- 0, /*tp_itemsize*/
- (destructor)BZ2Decomp_dealloc, /*tp_dealloc*/
- 0, /*tp_print*/
- 0, /*tp_getattr*/
- 0, /*tp_setattr*/
- 0, /*tp_reserved*/
- 0, /*tp_repr*/
- 0, /*tp_as_number*/
- 0, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- PyObject_GenericGetAttr,/*tp_getattro*/
- PyObject_GenericSetAttr,/*tp_setattro*/
- 0, /*tp_as_buffer*/
- Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE, /*tp_flags*/
- BZ2Decomp__doc__, /*tp_doc*/
- 0, /*tp_traverse*/
- 0, /*tp_clear*/
- 0, /*tp_richcompare*/
- 0, /*tp_weaklistoffset*/
- 0, /*tp_iter*/
- 0, /*tp_iternext*/
- BZ2Decomp_methods, /*tp_methods*/
- BZ2Decomp_members, /*tp_members*/
- 0, /*tp_getset*/
- 0, /*tp_base*/
- 0, /*tp_dict*/
- 0, /*tp_descr_get*/
- 0, /*tp_descr_set*/
- 0, /*tp_dictoffset*/
- (initproc)BZ2Decomp_init, /*tp_init*/
- PyType_GenericAlloc, /*tp_alloc*/
- PyType_GenericNew, /*tp_new*/
- PyObject_Free, /*tp_free*/
- 0, /*tp_is_gc*/
-};
-
-
-/* ===================================================================== */
-/* Module functions. */
-
-PyDoc_STRVAR(bz2_compress__doc__,
-"compress(data [, compresslevel=9]) -> string\n\
-\n\
-Compress data in one shot. If you want to compress data sequentially,\n\
-use an instance of BZ2Compressor instead. The compresslevel parameter, if\n\
-given, must be a number between 1 and 9.\n\
-");
-
-static PyObject *
-bz2_compress(PyObject *self, PyObject *args, PyObject *kwargs)
-{
- int compresslevel=9;
- Py_buffer pdata;
- char *data;
- int datasize;
- int bufsize;
- PyObject *ret = NULL;
- bz_stream _bzs;
- bz_stream *bzs = &_bzs;
- int bzerror;
- static char *kwlist[] = {"data", "compresslevel", 0};
-
- if (!PyArg_ParseTupleAndKeywords(args, kwargs, "y*|i",
- kwlist, &pdata,
- &compresslevel))
- return NULL;
- data = pdata.buf;
- datasize = pdata.len;
-
- if (compresslevel < 1 || compresslevel > 9) {
- PyErr_SetString(PyExc_ValueError,
- "compresslevel must be between 1 and 9");
- PyBuffer_Release(&pdata);
- return NULL;
- }
-
- /* Conforming to bz2 manual, this is large enough to fit compressed
- * data in one shot. We will check it later anyway. */
- bufsize = datasize + (datasize/100+1) + 600;
-
- ret = PyBytes_FromStringAndSize(NULL, bufsize);
- if (!ret) {
- PyBuffer_Release(&pdata);
- return NULL;
- }
-
- memset(bzs, 0, sizeof(bz_stream));
-
- bzs->next_in = data;
- bzs->avail_in = datasize;
- bzs->next_out = BUF(ret);
- bzs->avail_out = bufsize;
-
- bzerror = BZ2_bzCompressInit(bzs, compresslevel, 0, 0);
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- PyBuffer_Release(&pdata);
- Py_DECREF(ret);
- return NULL;
- }
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- bzerror = BZ2_bzCompress(bzs, BZ_FINISH);
- Py_END_ALLOW_THREADS
- if (bzerror == BZ_STREAM_END) {
- break;
- } else if (bzerror != BZ_FINISH_OK) {
- BZ2_bzCompressEnd(bzs);
- Util_CatchBZ2Error(bzerror);
- PyBuffer_Release(&pdata);
- Py_DECREF(ret);
- return NULL;
- }
- if (bzs->avail_out == 0) {
- bufsize = Util_NewBufferSize(bufsize);
- if (_PyBytes_Resize(&ret, bufsize) < 0) {
- BZ2_bzCompressEnd(bzs);
- PyBuffer_Release(&pdata);
- return NULL;
- }
- bzs->next_out = BUF(ret) + BZS_TOTAL_OUT(bzs);
- bzs->avail_out = bufsize - (bzs->next_out - BUF(ret));
- }
- }
-
- if (bzs->avail_out != 0) {
- if (_PyBytes_Resize(&ret, (Py_ssize_t)BZS_TOTAL_OUT(bzs)) < 0) {
- ret = NULL;
- }
- }
- BZ2_bzCompressEnd(bzs);
-
- PyBuffer_Release(&pdata);
- return ret;
-}
-
-PyDoc_STRVAR(bz2_decompress__doc__,
-"decompress(data) -> decompressed data\n\
-\n\
-Decompress data in one shot. If you want to decompress data sequentially,\n\
-use an instance of BZ2Decompressor instead.\n\
-");
-
-static PyObject *
-bz2_decompress(PyObject *self, PyObject *args)
-{
- Py_buffer pdata;
- char *data;
- int datasize;
- int bufsize = SMALLCHUNK;
- PyObject *ret;
- bz_stream _bzs;
- bz_stream *bzs = &_bzs;
- int bzerror;
-
- if (!PyArg_ParseTuple(args, "y*:decompress", &pdata))
- return NULL;
- data = pdata.buf;
- datasize = pdata.len;
-
- if (datasize == 0) {
- PyBuffer_Release(&pdata);
- return PyBytes_FromStringAndSize("", 0);
- }
-
- ret = PyBytes_FromStringAndSize(NULL, bufsize);
- if (!ret) {
- PyBuffer_Release(&pdata);
- return NULL;
- }
-
- memset(bzs, 0, sizeof(bz_stream));
-
- bzs->next_in = data;
- bzs->avail_in = datasize;
- bzs->next_out = BUF(ret);
- bzs->avail_out = bufsize;
-
- bzerror = BZ2_bzDecompressInit(bzs, 0, 0);
- if (bzerror != BZ_OK) {
- Util_CatchBZ2Error(bzerror);
- Py_DECREF(ret);
- PyBuffer_Release(&pdata);
- return NULL;
- }
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- bzerror = BZ2_bzDecompress(bzs);
- Py_END_ALLOW_THREADS
- if (bzerror == BZ_STREAM_END) {
- break;
- } else if (bzerror != BZ_OK) {
- BZ2_bzDecompressEnd(bzs);
- Util_CatchBZ2Error(bzerror);
- PyBuffer_Release(&pdata);
- Py_DECREF(ret);
- return NULL;
- }
- if (bzs->avail_in == 0) {
- BZ2_bzDecompressEnd(bzs);
- PyErr_SetString(PyExc_ValueError,
- "couldn't find end of stream");
- PyBuffer_Release(&pdata);
- Py_DECREF(ret);
- return NULL;
- }
- if (bzs->avail_out == 0) {
- bufsize = Util_NewBufferSize(bufsize);
- if (_PyBytes_Resize(&ret, bufsize) < 0) {
- BZ2_bzDecompressEnd(bzs);
- PyBuffer_Release(&pdata);
- return NULL;
- }
- bzs->next_out = BUF(ret) + BZS_TOTAL_OUT(bzs);
- bzs->avail_out = bufsize - (bzs->next_out - BUF(ret));
- }
- }
-
- if (bzs->avail_out != 0) {
- if (_PyBytes_Resize(&ret, (Py_ssize_t)BZS_TOTAL_OUT(bzs)) < 0) {
- ret = NULL;
- }
- }
- BZ2_bzDecompressEnd(bzs);
- PyBuffer_Release(&pdata);
-
- return ret;
-}
-
-static PyMethodDef bz2_methods[] = {
- {"compress", (PyCFunction) bz2_compress, METH_VARARGS|METH_KEYWORDS,
- bz2_compress__doc__},
- {"decompress", (PyCFunction) bz2_decompress, METH_VARARGS,
- bz2_decompress__doc__},
- {NULL, NULL} /* sentinel */
-};
-
-/* ===================================================================== */
-/* Initialization function. */
-
-PyDoc_STRVAR(bz2__doc__,
-"The python bz2 module provides a comprehensive interface for\n\
-the bz2 compression library. It implements a complete file\n\
-interface, one shot (de)compression functions, and types for\n\
-sequential (de)compression.\n\
-");
-
-
-static struct PyModuleDef bz2module = {
- PyModuleDef_HEAD_INIT,
- "bz2",
- bz2__doc__,
- -1,
- bz2_methods,
- NULL,
- NULL,
- NULL,
- NULL
-};
-
-PyMODINIT_FUNC
-PyInit_bz2(void)
-{
- PyObject *m;
-
- if (PyType_Ready(&BZ2File_Type) < 0)
- return NULL;
- if (PyType_Ready(&BZ2Comp_Type) < 0)
- return NULL;
- if (PyType_Ready(&BZ2Decomp_Type) < 0)
- return NULL;
-
- m = PyModule_Create(&bz2module);
- if (m == NULL)
- return NULL;
-
- PyModule_AddObject(m, "__author__", PyUnicode_FromString(__author__));
-
- Py_INCREF(&BZ2File_Type);
- PyModule_AddObject(m, "BZ2File", (PyObject *)&BZ2File_Type);
-
- Py_INCREF(&BZ2Comp_Type);
- PyModule_AddObject(m, "BZ2Compressor", (PyObject *)&BZ2Comp_Type);
-
- Py_INCREF(&BZ2Decomp_Type);
- PyModule_AddObject(m, "BZ2Decompressor", (PyObject *)&BZ2Decomp_Type);
- return m;
-}