e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/* SPDX-FileCopyrightText: 2004-2021 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup bli
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*/
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#include <zlib.h>
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#include "BLI_blenlib.h"
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#include "BLI_filereader.h"
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#include "MEM_guardedalloc.h"
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typedef struct {
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FileReader reader;
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FileReader *base;
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z_stream strm;
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void *in_buf;
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size_t in_size;
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} GzipReader;
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static ssize_t gzip_read(FileReader *reader, void *buffer, size_t size)
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{
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GzipReader *gzip = (GzipReader *)reader;
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gzip->strm.avail_out = size;
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gzip->strm.next_out = buffer;
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while (gzip->strm.avail_out > 0) {
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if (gzip->strm.avail_in == 0) {
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/* Ran out of buffered input data, read some more. */
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size_t readsize = gzip->base->read(gzip->base, gzip->in_buf, gzip->in_size);
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if (readsize > 0) {
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/* We got some data, so mark the buffer as refilled. */
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gzip->strm.avail_in = readsize;
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gzip->strm.next_in = gzip->in_buf;
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}
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else {
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/* The underlying file is EOF, so return as much as we can. */
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break;
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}
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}
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int ret = inflate(&gzip->strm, Z_NO_FLUSH);
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if (!ELEM(ret, Z_OK, Z_BUF_ERROR)) {
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break;
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}
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}
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ssize_t read_len = size - gzip->strm.avail_out;
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gzip->reader.offset += read_len;
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return read_len;
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}
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static void gzip_close(FileReader *reader)
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{
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GzipReader *gzip = (GzipReader *)reader;
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if (inflateEnd(&gzip->strm) != Z_OK) {
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printf("close gzip stream error\n");
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}
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MEM_freeN((void *)gzip->in_buf);
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gzip->base->close(gzip->base);
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MEM_freeN(gzip);
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}
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FileReader *BLI_filereader_new_gzip(FileReader *base)
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{
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GzipReader *gzip = MEM_callocN(sizeof(GzipReader), __func__);
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gzip->base = base;
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if (inflateInit2(&gzip->strm, 16 + MAX_WBITS) != Z_OK) {
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MEM_freeN(gzip);
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return NULL;
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}
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gzip->in_size = 256 * 2014;
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gzip->in_buf = MEM_mallocN(gzip->in_size, "gzip in buf");
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gzip->reader.read = gzip_read;
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gzip->reader.seek = NULL;
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gzip->reader.close = gzip_close;
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return (FileReader *)gzip;
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}
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