mirror of
https://git.proxmox.com/git/libgit2
synced 2025-05-06 11:19:47 +00:00
54 lines
997 B
C
54 lines
997 B
C
/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#include "compress.h"
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#include <zlib.h>
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#define BUFFER_SIZE (1024 * 1024)
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int git__compress(git_buf *buf, const void *buff, size_t len)
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{
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z_stream zs;
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char *zb;
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size_t have;
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memset(&zs, 0, sizeof(zs));
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if (deflateInit(&zs, Z_DEFAULT_COMPRESSION) != Z_OK)
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return -1;
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zb = git__malloc(BUFFER_SIZE);
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GITERR_CHECK_ALLOC(zb);
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zs.next_in = (void *)buff;
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zs.avail_in = (uInt)len;
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do {
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zs.next_out = (unsigned char *)zb;
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zs.avail_out = BUFFER_SIZE;
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if (deflate(&zs, Z_FINISH) == Z_STREAM_ERROR) {
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git__free(zb);
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return -1;
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}
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have = BUFFER_SIZE - (size_t)zs.avail_out;
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if (git_buf_put(buf, zb, have) < 0) {
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git__free(zb);
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return -1;
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}
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} while (zs.avail_out == 0);
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assert(zs.avail_in == 0);
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deflateEnd(&zs);
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git__free(zb);
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return 0;
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}
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