--- /dev/null
+/*
+
+python-bz2 - python bz2 library interface
+
+Copyright (c) 2002 Gustavo Niemeyer <niemeyer@conectiva.com>
+Copyright (c) 2002 Python Software Foundation; All Rights Reserved
+
+*/
+
+#include <stdio.h>
+#include <bzlib.h>
+#include "Python.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\
+";
+
+#define BUF(v) PyString_AS_STRING((PyStringObject *)v)
+
+#define MODE_CLOSED 0
+#define MODE_READ 1
+#define MODE_READ_EOF 2
+#define MODE_WRITE 3
+
+#define BZ2FileObject_Check(v) ((v)->ob_type == &BZ2File_Type)
+
+#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) \
+ (((long long)bzs->total_out_hi32 << 32) + bzs->total_out_lo32)
+#else
+#define BZS_TOTAL_OUT(bzs) \
+ bzs->total_out_lo32;
+#endif
+
+#ifdef WITH_THREAD
+#define ACQUIRE_LOCK(obj) PyThread_acquire_lock(obj->lock, 1)
+#define RELEASE_LOCK(obj) PyThread_release_lock(obj->lock)
+#else
+#define ACQUIRE_LOCK(obj)
+#define RELEASE_LOCK(obj)
+#endif
+
+#ifdef WITH_UNIVERSAL_NEWLINES
+/* 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 */
+#endif
+
+/* ===================================================================== */
+/* Structure definitions. */
+
+typedef struct {
+ PyFileObject file;
+ BZFILE *fp;
+ int mode;
+ long pos;
+ long 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. */
+
+static int
+Util_CatchBZ2Error(int bzerror)
+{
+ int ret = 0;
+ switch(bzerror) {
+ case BZ_OK:
+ case BZ_STREAM_END:
+ break;
+
+ case BZ_CONFIG_ERROR:
+ PyErr_SetString(PyExc_SystemError,
+ "the bz2 library was not compiled "
+ "correctly");
+ ret = 1;
+ break;
+
+ 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 *self, 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;
+#ifdef WITH_UNIVERSAL_NEWLINES
+ int newlinetypes = ((PyFileObject*)self)->f_newlinetypes;
+ int skipnextlf = ((PyFileObject*)self)->f_skipnextlf;
+ int univ_newline = ((PyFileObject*)self)->f_univ_newline;
+#endif
+
+ total_v_size = n > 0 ? n : 100;
+ v = PyString_FromStringAndSize((char *)NULL, total_v_size);
+ if (v == NULL)
+ return NULL;
+
+ buf = BUF(v);
+ end = buf + total_v_size;
+
+ for (;;) {
+ Py_BEGIN_ALLOW_THREADS
+#ifdef WITH_UNIVERSAL_NEWLINES
+ if (univ_newline) {
+ while (1) {
+ BZ2_bzRead(&bzerror, self->fp, &c, 1);
+ self->pos++;
+ if (bzerror != BZ_OK || buf == end)
+ break;
+ if (skipnextlf ) {
+ skipnextlf = 0;
+ if (c == '\n') {
+ /* Seeing a \n here with
+ * skipnextlf true means we
+ * saw a \r before.
+ */
+ newlinetypes |= NEWLINE_CRLF;
+ BZ2_bzRead(&bzerror, self->fp,
+ &c, 1);
+ if (bzerror != BZ_OK)
+ break;
+ } else {
+ newlinetypes |= NEWLINE_CR;
+ }
+ }
+ if (c == '\r') {
+ skipnextlf = 1;
+ c = '\n';
+ } else if ( c == '\n')
+ newlinetypes |= NEWLINE_LF;
+ *buf++ = c;
+ if (c == '\n') break;
+ }
+ if (bzerror == BZ_STREAM_END && skipnextlf)
+ newlinetypes |= NEWLINE_CR;
+ } else /* If not universal newlines use the normal loop */
+#endif
+ do {
+ BZ2_bzRead(&bzerror, self->fp, &c, 1);
+ self->pos++;
+ *buf++ = c;
+ } while (bzerror == BZ_OK && c != '\n' && buf != end);
+ Py_END_ALLOW_THREADS
+#ifdef WITH_UNIVERSAL_NEWLINES
+ ((PyFileObject*)self)->f_newlinetypes = newlinetypes;
+ ((PyFileObject*)self)->f_skipnextlf = skipnextlf;
+#endif
+ 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(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 (_PyString_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)
+ _PyString_Resize(&v, used_v_size);
+ return v;
+}
+
+#ifndef WITH_UNIVERSAL_NEWLINES
+#define Util_UnivNewlineRead(a,b,c,d,e) BZ2_bzRead(a,b,c,d)
+#else
+/* This is a hacked version of Python's
+ * fileobject.c:Py_UniversalNewlineFread(). */
+size_t
+Util_UnivNewlineRead(int *bzerror, BZFILE *stream,
+ char* buf, size_t n, BZ2FileObject *fobj)
+{
+ char *dst = buf;
+ PyFileObject *f = (PyFileObject *)fobj;
+ int newlinetypes, skipnextlf;
+
+ assert(buf != NULL);
+ assert(stream != NULL);
+
+ if (!f->f_univ_newline)
+ return BZ2_bzRead(bzerror, stream, buf, n);
+
+ newlinetypes = f->f_newlinetypes;
+ skipnextlf = f->f_skipnextlf;
+
+ /* Invariant: n is the number of bytes remaining to be filled
+ * in the buffer.
+ */
+ while (n) {
+ size_t nread;
+ int shortread;
+ char *src = dst;
+
+ nread = BZ2_bzRead(bzerror, stream, dst, n);
+ assert(nread <= n);
+ n -= nread; /* assuming 1 byte out for each in; will adjust */
+ shortread = n != 0; /* true iff EOF or error */
+ while (nread--) {
+ char c = *src++;
+ if (c == '\r') {
+ /* Save as LF and set flag to skip next LF. */
+ *dst++ = '\n';
+ skipnextlf = 1;
+ }
+ else if (skipnextlf && c == '\n') {
+ /* Skip LF, and remember we saw CR LF. */
+ skipnextlf = 0;
+ newlinetypes |= NEWLINE_CRLF;
+ ++n;
+ }
+ else {
+ /* Normal char to be stored in buffer. Also
+ * update the newlinetypes flag if either this
+ * is an LF or the previous char was a CR.
+ */
+ if (c == '\n')
+ newlinetypes |= NEWLINE_LF;
+ else if (skipnextlf)
+ newlinetypes |= NEWLINE_CR;
+ *dst++ = c;
+ skipnextlf = 0;
+ }
+ }
+ if (shortread) {
+ /* If this is EOF, update type flags. */
+ if (skipnextlf && *bzerror == BZ_STREAM_END)
+ newlinetypes |= NEWLINE_CR;
+ break;
+ }
+ }
+ f->f_newlinetypes = newlinetypes;
+ f->f_skipnextlf = skipnextlf;
+ return dst - buf;
+}
+#endif
+
+/* This is a hacked version of Python's fileobject.c:drop_readahead(). */
+static void
+Util_DropReadAhead(BZ2FileObject *self)
+{
+ PyFileObject *f = (PyFileObject*)self;
+ 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 *self, int bufsize)
+{
+ int chunksize;
+ int bzerror;
+ PyFileObject *f = (PyFileObject*)self;
+
+ if (f->f_buf != NULL) {
+ if((f->f_bufend - f->f_bufptr) >= 1)
+ return 0;
+ else
+ Util_DropReadAhead(self);
+ }
+ if (self->mode == MODE_READ_EOF) {
+ return -1;
+ }
+ if ((f->f_buf = PyMem_Malloc(bufsize)) == NULL) {
+ return -1;
+ }
+ Py_BEGIN_ALLOW_THREADS
+ chunksize = Util_UnivNewlineRead(&bzerror, self->fp, f->f_buf,
+ bufsize, self);
+ Py_END_ALLOW_THREADS
+ self->pos += chunksize;
+ if (bzerror == BZ_STREAM_END) {
+ self->size = self->pos;
+ self->mode = MODE_READ_EOF;
+ } else if (bzerror != BZ_OK) {
+ Util_CatchBZ2Error(bzerror);
+ Util_DropReadAhead(self);
+ 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 PyStringObject *
+Util_ReadAheadGetLineSkip(BZ2FileObject *bf, int skip, int bufsize)
+{
+ PyFileObject *f = (PyFileObject*)bf;
+ PyStringObject* s;
+ char *bufptr;
+ char *buf;
+ int len;
+
+ if (f->f_buf == NULL)
+ if (Util_ReadAhead(bf, bufsize) < 0)
+ return NULL;
+
+ len = f->f_bufend - f->f_bufptr;
+ if (len == 0)
+ return (PyStringObject *)
+ PyString_FromStringAndSize(NULL, skip);
+ bufptr = memchr(f->f_bufptr, '\n', len);
+ if (bufptr != NULL) {
+ bufptr++; /* Count the '\n' */
+ len = bufptr - f->f_bufptr;
+ s = (PyStringObject *)
+ PyString_FromStringAndSize(NULL, skip+len);
+ if (s == NULL)
+ return NULL;
+ memcpy(PyString_AS_STRING(s)+skip, f->f_bufptr, len);
+ f->f_bufptr = bufptr;
+ if (bufptr == f->f_bufend)
+ Util_DropReadAhead(bf);
+ } else {
+ bufptr = f->f_bufptr;
+ buf = f->f_buf;
+ f->f_buf = NULL; /* Force new readahead buffer */
+ s = Util_ReadAheadGetLineSkip(
+ bf, skip+len, bufsize + (bufsize>>2) );
+ if (s == NULL) {
+ PyMem_Free(buf);
+ return NULL;
+ }
+ memcpy(PyString_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 = PyString_FromString("");
+ 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;
+ }
+
+ 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 = PyString_FromStringAndSize((char *)NULL, buffersize);
+ if (ret == NULL)
+ goto cleanup;
+ bytesread = 0;
+
+ for (;;) {
+ Py_BEGIN_ALLOW_THREADS
+ chunksize = Util_UnivNewlineRead(&bzerror, self->fp,
+ BUF(ret)+bytesread,
+ buffersize-bytesread,
+ self);
+ 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 (_PyString_Resize(&ret, buffersize) < 0)
+ goto cleanup;
+ } else {
+ break;
+ }
+ }
+ if (bytesread != buffersize)
+ _PyString_Resize(&ret, bytesread);
+
+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 = PyString_FromString("");
+ 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;
+ }
+
+ if (sizehint == 0)
+ ret = PyString_FromString("");
+ 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;
+ }
+
+ if ((list = PyList_New(0)) == NULL)
+ goto cleanup;
+
+ for (;;) {
+ Py_BEGIN_ALLOW_THREADS
+ nread = Util_UnivNewlineRead(&bzerror, self->fp,
+ buffer+nfilled,
+ buffersize-nfilled, self);
+ 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 (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 = PyString_FromStringAndSize(
+ NULL, buffersize);
+ if (big_buffer == NULL)
+ goto error;
+ buffer = PyString_AS_STRING(big_buffer);
+ memcpy(buffer, small_buffer, nfilled);
+ }
+ else {
+ /* Grow the big buffer */
+ _PyString_Resize(&big_buffer, buffersize);
+ buffer = PyString_AS_STRING(big_buffer);
+ }
+ continue;
+ }
+ end = buffer+nfilled+nread;
+ q = buffer;
+ do {
+ /* Process complete lines */
+ p++;
+ line = PyString_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);
+ } while (p != NULL);
+ /* 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 = PyString_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;
+ }
+ PyString_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;
+ char *buf;
+ int len;
+ int bzerror;
+
+ if (!PyArg_ParseTuple(args, "s#", &buf, &len))
+ return NULL;
+
+ 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;;
+ }
+
+ PyFile_SoftSpace((PyObject*)self, 0);
+
+ 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:
+ 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);
+ 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 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 (!PyString_Check(v)) {
+ const char *buffer;
+ int len;
+ if (PyObject_AsCharBuffer(v, &buffer, &len)) {
+ PyErr_SetString(PyExc_TypeError,
+ "writelines() "
+ "argument must be "
+ "a sequence of "
+ "strings");
+ goto error;
+ }
+ line = PyString_FromStringAndSize(buffer,
+ len);
+ if (line == NULL)
+ goto error;
+ Py_DECREF(v);
+ PyList_SET_ITEM(list, i, line);
+ }
+ }
+
+ PyFile_SoftSpace((PyObject*)self, 0);
+
+ /* 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 = PyString_GET_SIZE(line);
+ BZ2_bzWrite (&bzerror, self->fp,
+ PyString_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;
+ long offset;
+ char small_buffer[SMALLCHUNK];
+ char *buffer = small_buffer;
+ size_t buffersize = SMALLCHUNK;
+ int bytesread = 0;
+ int readsize;
+ int chunksize;
+ int bzerror;
+ int rewind = 0;
+ PyObject *func;
+ PyObject *ret = NULL;
+
+ if (!PyArg_ParseTuple(args, "l|i:seek", &offset, &where))
+ 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 (offset < 0) {
+ if (where == 1) {
+ offset = self->pos + offset;
+ rewind = 1;
+ } else if (where == 2) {
+ if (self->size == -1) {
+ assert(self->mode != MODE_READ_EOF);
+ for (;;) {
+ Py_BEGIN_ALLOW_THREADS
+ chunksize = Util_UnivNewlineRead(
+ &bzerror, self->fp,
+ buffer, buffersize,
+ self);
+ 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;
+ if (offset >= self->pos)
+ offset -= self->pos;
+ else
+ rewind = 1;
+ }
+ if (offset < 0)
+ offset = 0;
+ } else if (where == 0) {
+ if (offset >= self->pos)
+ offset -= self->pos;
+ else
+ rewind = 1;
+ }
+
+ if (rewind) {
+ BZ2_bzReadClose(&bzerror, self->fp);
+ func = Py_FindMethod(PyFile_Type.tp_methods, (PyObject*)self,
+ "seek");
+ if (bzerror != BZ_OK) {
+ Util_CatchBZ2Error(bzerror);
+ goto cleanup;
+ }
+ if (!func) {
+ PyErr_SetString(PyExc_RuntimeError,
+ "can't find file.seek method");
+ goto cleanup;
+ }
+ ret = PyObject_CallFunction(func, "(i)", 0);
+ if (!ret)
+ goto cleanup;
+ Py_DECREF(ret);
+ ret = NULL;
+ self->pos = 0;
+ self->fp = BZ2_bzReadOpen(&bzerror,
+ PyFile_AsFile((PyObject*)self),
+ 0, 0, NULL, 0);
+ if (bzerror != BZ_OK) {
+ Util_CatchBZ2Error(bzerror);
+ goto cleanup;
+ }
+ self->mode = MODE_READ;
+ } else if (self->mode == MODE_READ_EOF) {
+ goto exit;
+ }
+
+ if (offset == 0)
+ 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
+ readsize = offset-bytesread;
+ Py_BEGIN_ALLOW_THREADS
+ chunksize = Util_UnivNewlineRead(&bzerror, self->fp,
+ buffer, readsize, self);
+ 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;
+ }
+
+ ret = PyInt_FromLong(self->pos);
+
+cleanup:
+ return ret;
+}
+
+PyDoc_STRVAR(BZ2File_notsup__doc__,
+"Operation not supported.\n\
+");
+
+static PyObject *
+BZ2File_notsup(BZ2FileObject *self, PyObject *args)
+{
+ PyErr_SetString(PyExc_IOError, "operation not supported");
+ return NULL;
+}
+
+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 *file_close;
+ PyObject *ret = NULL;
+ int bzerror = BZ_OK;
+
+ 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;
+ file_close = Py_FindMethod(PyFile_Type.tp_methods, (PyObject*)self,
+ "close");
+ if (!file_close) {
+ PyErr_SetString(PyExc_RuntimeError,
+ "can't find file.close method");
+ goto cleanup;
+ }
+ ret = PyObject_CallObject(file_close, NULL);
+ if (bzerror != BZ_OK) {
+ Util_CatchBZ2Error(bzerror);
+ Py_XDECREF(ret);
+ ret = NULL;
+ goto cleanup;
+ }
+
+cleanup:
+ RELEASE_LOCK(self);
+ return ret;
+}
+
+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__},
+ {"truncate", (PyCFunction)BZ2File_notsup, METH_VARARGS, BZ2File_notsup__doc__},
+ {"readinto", (PyCFunction)BZ2File_notsup, METH_VARARGS, BZ2File_notsup__doc__},
+ {"close", (PyCFunction)BZ2File_close, METH_NOARGS, BZ2File_close__doc__},
+ {NULL, NULL} /* sentinel */
+};
+
+
+/* ===================================================================== */
+/* Slot definitions for BZ2File_Type. */
+
+static int
+BZ2File_init(BZ2FileObject *self, PyObject *args, PyObject *kwargs)
+{
+ PyObject *file_args = NULL;
+ static char *kwlist[] = {"filename", "mode", "buffering",
+ "compresslevel", 0};
+ char *name = NULL;
+ char *mode = "r";
+ int buffering = -1;
+ int compresslevel = 9;
+ int bzerror;
+ int mode_char = 0;
+ int univ_newline = 0;
+
+ self->size = -1;
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "et|sii:BZ2File",
+ kwlist, Py_FileSystemDefaultEncoding,
+ &name, &mode, &buffering,
+ &compresslevel))
+ return -1;
+
+ if (compresslevel < 1 || compresslevel > 9) {
+ PyErr_SetString(PyExc_ValueError,
+ "compresslevel must be between 1 and 9");
+ return -1;
+ }
+
+ for (;;) {
+ int error = 0;
+ switch (*mode) {
+ case 'r':
+ case 'w':
+ if (mode_char)
+ error = 1;
+ mode_char = *mode;
+ break;
+
+ case 'b':
+ break;
+
+ case 'U':
+ univ_newline = 1;
+ break;
+
+ default:
+ error = 1;
+ }
+ if (error) {
+ PyErr_SetString(PyExc_ValueError, "invalid mode");
+ return -1;
+ }
+ mode++;
+ if (*mode == 0)
+ break;
+ }
+
+ if (mode_char == 'r')
+ mode = univ_newline ? "rbU" : "rb";
+ else
+ mode = univ_newline ? "wbU" : "wb";
+
+ file_args = Py_BuildValue("(ssi)", name, mode, buffering);
+ if (!file_args)
+ goto error;
+
+ if (PyFile_Type.tp_init((PyObject *)self, file_args, NULL) < 0)
+ goto error;
+
+#ifdef WITH_THREAD
+ self->lock = PyThread_allocate_lock();
+ if (!self->lock)
+ goto error;
+#endif
+
+ if (mode_char == 'r')
+ self->fp = BZ2_bzReadOpen(&bzerror,
+ PyFile_AsFile((PyObject*)self),
+ 0, 0, NULL, 0);
+ else
+ self->fp = BZ2_bzWriteOpen(&bzerror,
+ PyFile_AsFile((PyObject*)self),
+ compresslevel, 0, 0);
+
+ if (bzerror != BZ_OK) {
+ Util_CatchBZ2Error(bzerror);
+ goto error;
+ }
+
+ self->mode = (mode_char == 'r') ? MODE_READ : MODE_WRITE;
+
+ Py_XDECREF(file_args);
+ PyMem_Free(name);
+ return 0;
+
+error:
+#ifdef WITH_THREAD
+ if (self->lock)
+ PyThread_free_lock(self->lock);
+#endif
+ Py_XDECREF(file_args);
+ PyMem_Free(name);
+ 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;
+ }
+ ((PyObject*)self)->ob_type->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)
+{
+ PyStringObject* ret;
+ ACQUIRE_LOCK(self);
+ if (self->mode == MODE_CLOSED) {
+ 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 || PyString_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\
+")
+#ifdef WITH_UNIVERSAL_NEWLINES
+PyDoc_STR(
+"\n\
+Add a 'U' to mode to open the file for input with universal newline\n\
+support. Any line ending in the input file will be seen as a '\\n' in\n\
+Python. Also, a file so opened gains the attribute 'newlines'; the value\n\
+for this attribute is one of None (no newline read yet), '\\r', '\\n',\n\
+'\\r\\n' or a tuple containing all the newline types seen. Universal\n\
+newlines are available only when reading.\n\
+")
+#endif
+;
+
+statichere PyTypeObject BZ2File_Type = {
+ PyObject_HEAD_INIT(NULL)
+ 0, /*ob_size*/
+ "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_compare*/
+ 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*/
+ 0, /*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*/
+ 0, /*tp_new*/
+ _PyObject_Del, /*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)
+{
+ char *data;
+ int datasize;
+ int bufsize = SMALLCHUNK;
+ long totalout;
+ PyObject *ret;
+ bz_stream *bzs = &self->bzs;
+ int bzerror;
+
+ if (!PyArg_ParseTuple(args, "s#", &data, &datasize))
+ return NULL;
+
+ ACQUIRE_LOCK(self);
+ if (!self->running) {
+ PyErr_SetString(PyExc_ValueError, "this object was already "
+ "flushed");
+ goto error;
+ }
+
+ ret = PyString_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_out == 0) {
+ bufsize = Util_NewBufferSize(bufsize);
+ if (_PyString_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));
+ } else if (bzs->avail_in == 0) {
+ break;
+ }
+ }
+
+ _PyString_Resize(&ret, BZS_TOTAL_OUT(bzs) - totalout);
+
+ RELEASE_LOCK(self);
+ return ret;
+
+error:
+ RELEASE_LOCK(self);
+ 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;
+ bz_stream *bzs = &self->bzs;
+ int totalout;
+ int bzerror;
+
+ ACQUIRE_LOCK(self);
+ if (!self->running) {
+ PyErr_SetString(PyExc_ValueError, "object was already "
+ "flushed");
+ goto error;
+ }
+ self->running = 0;
+
+ ret = PyString_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 (_PyString_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)
+ _PyString_Resize(&ret, BZS_TOTAL_OUT(bzs) - totalout);
+
+ 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)
+ 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);
+#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);
+ ((PyObject*)self)->ob_type->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\
+");
+
+statichere PyTypeObject BZ2Comp_Type = {
+ PyObject_HEAD_INIT(NULL)
+ 0, /*ob_size*/
+ "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_compare*/
+ 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_Del, /*tp_free*/
+ 0, /*tp_is_gc*/
+};
+
+
+/* ===================================================================== */
+/* Members of BZ2Decomp. */
+
+#define OFF(x) offsetof(BZ2DecompObject, x)
+
+static PyMemberDef BZ2Decomp_members[] = {
+ {"unused_data", T_OBJECT, OFF(unused_data), RO},
+ {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)
+{
+ char *data;
+ int datasize;
+ int bufsize = SMALLCHUNK;
+ long totalout;
+ PyObject *ret;
+ bz_stream *bzs = &self->bzs;
+ int bzerror;
+
+ if (!PyArg_ParseTuple(args, "s#", &data, &datasize))
+ return NULL;
+
+ ACQUIRE_LOCK(self);
+ if (!self->running) {
+ PyErr_SetString(PyExc_EOFError, "end of stream was "
+ "already found");
+ goto error;
+ }
+
+ ret = PyString_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 =
+ PyString_FromStringAndSize(bzs->next_in,
+ bzs->avail_in);
+ }
+ self->running = 0;
+ break;
+ }
+ if (bzerror != BZ_OK) {
+ Util_CatchBZ2Error(bzerror);
+ goto error;
+ }
+ if (bzs->avail_out == 0) {
+ bufsize = Util_NewBufferSize(bufsize);
+ if (_PyString_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));
+ } else if (bzs->avail_in == 0) {
+ break;
+ }
+ }
+
+ if (bzs->avail_out != 0)
+ _PyString_Resize(&ret, BZS_TOTAL_OUT(bzs) - totalout);
+
+ RELEASE_LOCK(self);
+ return ret;
+
+error:
+ RELEASE_LOCK(self);
+ 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)
+ goto error;
+#endif
+
+ self->unused_data = PyString_FromString("");
+ 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);
+#endif
+ Py_XDECREF(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);
+ ((PyObject*)self)->ob_type->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\
+");
+
+statichere PyTypeObject BZ2Decomp_Type = {
+ PyObject_HEAD_INIT(NULL)
+ 0, /*ob_size*/
+ "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_compare*/
+ 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_Del, /*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;
+ char *data;
+ int datasize;
+ int bufsize;
+ PyObject *ret;
+ bz_stream _bzs;
+ bz_stream *bzs = &_bzs;
+ int bzerror;
+ static char *kwlist[] = {"data", "compresslevel", 0};
+
+ if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s#|i",
+ kwlist, &data, &datasize,
+ &compresslevel))
+ return NULL;
+
+ if (compresslevel < 1 || compresslevel > 9) {
+ PyErr_SetString(PyExc_ValueError,
+ "compresslevel must be between 1 and 9");
+ 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 = PyString_FromStringAndSize(NULL, bufsize);
+ if (!ret)
+ 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);
+ 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);
+ Py_DECREF(ret);
+ return NULL;
+ }
+ if (bzs->avail_out == 0) {
+ bufsize = Util_NewBufferSize(bufsize);
+ if (_PyString_Resize(&ret, bufsize) < 0) {
+ BZ2_bzCompressEnd(bzs);
+ Py_DECREF(ret);
+ 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)
+ _PyString_Resize(&ret, BZS_TOTAL_OUT(bzs));
+ BZ2_bzCompressEnd(bzs);
+
+ 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)
+{
+ char *data;
+ int datasize;
+ int bufsize = SMALLCHUNK;
+ PyObject *ret;
+ bz_stream _bzs;
+ bz_stream *bzs = &_bzs;
+ int bzerror;
+
+ if (!PyArg_ParseTuple(args, "s#", &data, &datasize))
+ return NULL;
+
+ if (datasize == 0)
+ return PyString_FromString("");
+
+ ret = PyString_FromStringAndSize(NULL, bufsize);
+ if (!ret)
+ 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);
+ 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);
+ Py_DECREF(ret);
+ return NULL;
+ }
+ if (bzs->avail_out == 0) {
+ bufsize = Util_NewBufferSize(bufsize);
+ if (_PyString_Resize(&ret, bufsize) < 0) {
+ BZ2_bzDecompressEnd(bzs);
+ Py_DECREF(ret);
+ return NULL;
+ }
+ bzs->next_out = BUF(ret) + BZS_TOTAL_OUT(bzs);
+ bzs->avail_out = bufsize - (bzs->next_out - BUF(ret));
+ } else if (bzs->avail_in == 0) {
+ BZ2_bzDecompressEnd(bzs);
+ PyErr_SetString(PyExc_ValueError,
+ "couldn't find end of stream");
+ Py_DECREF(ret);
+ return NULL;
+ }
+ }
+
+ if (bzs->avail_out != 0)
+ _PyString_Resize(&ret, BZS_TOTAL_OUT(bzs));
+ BZ2_bzDecompressEnd(bzs);
+
+ 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\
+");
+
+DL_EXPORT(void)
+initbz2(void)
+{
+ PyObject *m;
+
+ BZ2File_Type.ob_type = &PyType_Type;
+ BZ2File_Type.tp_base = &PyFile_Type;
+ BZ2File_Type.tp_new = PyFile_Type.tp_new;
+
+ BZ2Comp_Type.ob_type = &PyType_Type;
+ BZ2Decomp_Type.ob_type = &PyType_Type;
+
+ m = Py_InitModule3("bz2", bz2_methods, bz2__doc__);
+
+ PyModule_AddObject(m, "__author__", PyString_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);
+}
projects / python / commitdiff