grep: restore pre-9ef10437bb88 behavior, enable wdir search by tweakdefaults
Unfortunately, python-hglib relies on the original grep behavior and is
documented as such. Even though we agreed to introduce the BC, we shouldn't
break existing libraries.
So this patch flips the default again and move the new default to
ui.tweakdefaults. We could instead use HGPLAIN to turn this flag off, but
that would be rather confusing as the old/new behaviors are quite different.
Differential Revision: https://phab.mercurial-scm.org/D3919
/**
* Copyright (c) 2016-present, Gregory Szorc
* All rights reserved.
*
* This software may be modified and distributed under the terms
* of the BSD license. See the LICENSE file for details.
*/
#include "python-zstandard.h"
#define min(a, b) (((a) < (b)) ? (a) : (b))
extern PyObject* ZstdError;
PyDoc_STRVAR(ZstdCompressorIterator__doc__,
"Represents an iterator of compressed data.\n"
);
static void ZstdCompressorIterator_dealloc(ZstdCompressorIterator* self) {
Py_XDECREF(self->readResult);
Py_XDECREF(self->compressor);
Py_XDECREF(self->reader);
if (self->buffer.buf) {
PyBuffer_Release(&self->buffer);
memset(&self->buffer, 0, sizeof(self->buffer));
}
if (self->output.dst) {
PyMem_Free(self->output.dst);
self->output.dst = NULL;
}
PyObject_Del(self);
}
static PyObject* ZstdCompressorIterator_iter(PyObject* self) {
Py_INCREF(self);
return self;
}
static PyObject* ZstdCompressorIterator_iternext(ZstdCompressorIterator* self) {
size_t zresult;
PyObject* readResult = NULL;
PyObject* chunk;
char* readBuffer;
Py_ssize_t readSize = 0;
Py_ssize_t bufferRemaining;
if (self->finishedOutput) {
PyErr_SetString(PyExc_StopIteration, "output flushed");
return NULL;
}
feedcompressor:
/* If we have data left in the input, consume it. */
if (self->input.pos < self->input.size) {
Py_BEGIN_ALLOW_THREADS
zresult = ZSTD_compress_generic(self->compressor->cctx, &self->output,
&self->input, ZSTD_e_continue);
Py_END_ALLOW_THREADS
/* Release the Python object holding the input buffer. */
if (self->input.pos == self->input.size) {
self->input.src = NULL;
self->input.pos = 0;
self->input.size = 0;
Py_DECREF(self->readResult);
self->readResult = NULL;
}
if (ZSTD_isError(zresult)) {
PyErr_Format(ZstdError, "zstd compress error: %s", ZSTD_getErrorName(zresult));
return NULL;
}
/* If it produced output data, emit it. */
if (self->output.pos) {
chunk = PyBytes_FromStringAndSize(self->output.dst, self->output.pos);
self->output.pos = 0;
return chunk;
}
}
/* We should never have output data sitting around after a previous call. */
assert(self->output.pos == 0);
/* The code above should have either emitted a chunk and returned or consumed
the entire input buffer. So the state of the input buffer is not
relevant. */
if (!self->finishedInput) {
if (self->reader) {
readResult = PyObject_CallMethod(self->reader, "read", "I", self->inSize);
if (!readResult) {
PyErr_SetString(ZstdError, "could not read() from source");
return NULL;
}
PyBytes_AsStringAndSize(readResult, &readBuffer, &readSize);
}
else {
assert(self->buffer.buf);
/* Only support contiguous C arrays. */
assert(self->buffer.strides == NULL && self->buffer.suboffsets == NULL);
assert(self->buffer.itemsize == 1);
readBuffer = (char*)self->buffer.buf + self->bufferOffset;
bufferRemaining = self->buffer.len - self->bufferOffset;
readSize = min(bufferRemaining, (Py_ssize_t)self->inSize);
self->bufferOffset += readSize;
}
if (0 == readSize) {
Py_XDECREF(readResult);
self->finishedInput = 1;
}
else {
self->readResult = readResult;
}
}
/* EOF */
if (0 == readSize) {
self->input.src = NULL;
self->input.size = 0;
self->input.pos = 0;
zresult = ZSTD_compress_generic(self->compressor->cctx, &self->output,
&self->input, ZSTD_e_end);
if (ZSTD_isError(zresult)) {
PyErr_Format(ZstdError, "error ending compression stream: %s",
ZSTD_getErrorName(zresult));
return NULL;
}
assert(self->output.pos);
if (0 == zresult) {
self->finishedOutput = 1;
}
chunk = PyBytes_FromStringAndSize(self->output.dst, self->output.pos);
self->output.pos = 0;
return chunk;
}
/* New data from reader. Feed into compressor. */
self->input.src = readBuffer;
self->input.size = readSize;
self->input.pos = 0;
Py_BEGIN_ALLOW_THREADS
zresult = ZSTD_compress_generic(self->compressor->cctx, &self->output,
&self->input, ZSTD_e_continue);
Py_END_ALLOW_THREADS
/* The input buffer currently points to memory managed by Python
(readBuffer). This object was allocated by this function. If it wasn't
fully consumed, we need to release it in a subsequent function call.
If it is fully consumed, do that now.
*/
if (self->input.pos == self->input.size) {
self->input.src = NULL;
self->input.pos = 0;
self->input.size = 0;
Py_XDECREF(self->readResult);
self->readResult = NULL;
}
if (ZSTD_isError(zresult)) {
PyErr_Format(ZstdError, "zstd compress error: %s", ZSTD_getErrorName(zresult));
return NULL;
}
assert(self->input.pos <= self->input.size);
/* If we didn't write anything, start the process over. */
if (0 == self->output.pos) {
goto feedcompressor;
}
chunk = PyBytes_FromStringAndSize(self->output.dst, self->output.pos);
self->output.pos = 0;
return chunk;
}
PyTypeObject ZstdCompressorIteratorType = {
PyVarObject_HEAD_INIT(NULL, 0)
"zstd.ZstdCompressorIterator", /* tp_name */
sizeof(ZstdCompressorIterator), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)ZstdCompressorIterator_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 */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
ZstdCompressorIterator__doc__, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
ZstdCompressorIterator_iter, /* tp_iter */
(iternextfunc)ZstdCompressorIterator_iternext, /* tp_iternext */
0, /* 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 */
0, /* tp_init */
0, /* tp_alloc */
PyType_GenericNew, /* tp_new */
};
void compressoriterator_module_init(PyObject* mod) {
Py_TYPE(&ZstdCompressorIteratorType) = &PyType_Type;
if (PyType_Ready(&ZstdCompressorIteratorType) < 0) {
return;
}
}