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b3aca9ef48
The goal is to use a file descriptor as an input. Thanks to that we shouldn't send a chunk of memory over expensive protocol.
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "contrib/zopfli/wrapper/wrapper_zopfli.h"
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#include <fcntl.h>
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#include <unistd.h>
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#include <cstdio>
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#include <cstdlib>
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#include <memory>
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int ZopfliCompressFD(const ZopfliOptions* options, ZopfliFormat output_type,
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int infd, int outfd) {
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off_t insize = lseek(infd, 0, SEEK_END);
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if (insize < 0) {
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return -1;
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}
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if (lseek(infd, 0, SEEK_SET) < 0) {
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return -1;
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}
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auto inbuf = std::make_unique<uint8_t[]>(insize);
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if (read(infd, inbuf.get(), insize) != insize) {
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return -1;
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}
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size_t outsize = 0;
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uint8_t* outbuf = nullptr;
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ZopfliCompress(options, output_type, inbuf.get(), insize, &outbuf, &outsize);
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size_t retsize = write(outfd, outbuf, outsize);
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free(outbuf);
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if (outsize != retsize) {
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return -1;
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}
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return 0;
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}
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