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56 lines
1.9 KiB
56 lines
1.9 KiB
1 year ago
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From 2c755739d84e409a6331902f5c15943a192a40f4 Mon Sep 17 00:00:00 2001
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From: Yu Watanabe <watanabe.yu+github@gmail.com>
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Date: Tue, 4 Apr 2023 14:34:32 +0900
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Subject: [PATCH] compress: introduce compression_supported() helper function
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(cherry picked from commit 83f3d73da8d132773dd91aae0fa7babb74920774)
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Resolves: #2183546
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---
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src/basic/compress.c | 10 ++++++++++
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src/basic/compress.h | 3 +++
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2 files changed, 13 insertions(+)
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diff --git a/src/basic/compress.c b/src/basic/compress.c
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index 1e94635397..dce0ebf222 100644
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--- a/src/basic/compress.c
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+++ b/src/basic/compress.c
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@@ -66,6 +66,16 @@ static const char* const compression_table[_COMPRESSION_MAX] = {
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DEFINE_STRING_TABLE_LOOKUP(compression, Compression);
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+bool compression_supported(Compression c) {
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+ static const unsigned supported =
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+ (1U << COMPRESSION_NONE) |
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+ (1U << COMPRESSION_XZ) * HAVE_XZ |
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+ (1U << COMPRESSION_LZ4) * HAVE_LZ4 |
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+ (1U << COMPRESSION_ZSTD) * HAVE_ZSTD;
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+
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+ return c >= 0 && c < _COMPRESSION_MAX && FLAGS_SET(supported, 1U << c);
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+}
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+
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int compress_blob_xz(const void *src, uint64_t src_size,
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void *dst, size_t dst_alloc_size, size_t *dst_size) {
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#if HAVE_XZ
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diff --git a/src/basic/compress.h b/src/basic/compress.h
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index 583b105c66..2201bca74c 100644
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--- a/src/basic/compress.h
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+++ b/src/basic/compress.h
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@@ -2,6 +2,7 @@
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#pragma once
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#include <errno.h>
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+#include <stdbool.h>
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#include <stdint.h>
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#include <unistd.h>
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@@ -17,6 +18,8 @@ typedef enum Compression {
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const char* compression_to_string(Compression compression);
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Compression compression_from_string(const char *compression);
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+bool compression_supported(Compression c);
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+
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int compress_blob_xz(const void *src, uint64_t src_size,
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void *dst, size_t dst_alloc_size, size_t *dst_size);
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int compress_blob_lz4(const void *src, uint64_t src_size,
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