1 files changed, 0 insertions, 174 deletions
diff --git a/util/compress/deflate.go b/util/compress/deflate.go
deleted file mode 100644
index 188885b5a..000000000
--- a/util/compress/deflate.go
+++ /dev/null
@@ -1,174 +0,0 @@
-// Copyright (C) 2019-2021 Algorand, Inc.
-// This file is part of go-algorand
-//
-// go-algorand is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Affero General Public License as
-// published by the Free Software Foundation, either version 3 of the
-// License, or (at your option) any later version.
-//
-// go-algorand is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU Affero General Public License for more details.
-//
-// You should have received a copy of the GNU Affero General Public License
-// along with go-algorand.  If not, see <https://www.gnu.org/licenses/>.
-
-package compress
-
-// #cgo CFLAGS: -Wall -std=c99 -I${SRCDIR}/libdeflate
-// #cgo amd64 CFLAGS: -DX86 -D__x86_64__ -D__i386__
-// #cgo arm64 CFLAGS: -DARM
-// #cgo arm CFLAGS: -DARM
-// #cgo linux,amd64 CFLAGS: -march=sandybridge
-// #cgo darwin,amd64 CFLAGS: -march=tremont
-// #include <stdint.h>
-// int isNull(void * c) {
-// 	if(!c) {
-//		return 1;
-//	}
-//	return 0;
-// };
-//
-// #ifdef X86
-// #include "lib/x86/cpu_features.c"
-// #endif
-// #ifdef ARM
-// #include "lib/arm/cpu_features.c"
-// #endif
-// #define dispatch crc32_dispatch
-// #include "lib/crc32.c"
-// #undef dispatch
-// #define dispatch compress_dispatch
-// #define bitbuf_t compress_bitbuf_t
-// #include "lib/deflate_compress.c"
-// #undef bitbuf_t
-// #undef dispatch
-// #undef BITBUF_NBITS
-// #include "lib/deflate_decompress.c"
-// #include "lib/gzip_compress.c"
-// #include "lib/gzip_decompress.c"
-// #include "lib/utils.c"
-import "C"
-
-import (
-	"errors"
-	"runtime"
-	"unsafe"
-)
-
-var (
-	// ErrOutOfMemory is returned when we fail to allocate the compressor/decompressor
-	ErrOutOfMemory = errors.New("out of memory")
-	// ErrShortBuffer is returned when the output buffer is too small to fit the compressed/decompressed data
-	ErrShortBuffer = errors.New("short buffer")
-	// ErrNoInput is returned when no input buffer data is provided
-	ErrNoInput = errors.New("empty input")
-	// ErrBadData is returned when the compressed data is corrupted
-	ErrBadData = errors.New("data was corrupted, invalid or unsupported")
-	// ErrInsufficientSpace is returned when the provided output buffer is found to be too small during the decompression
-	ErrInsufficientSpace = errors.New("decompression failed: buffer too short. Retry with larger buffer")
-	// ErrShortOutput should not be generated using the current libdeflate usage, but remain here for compatibility
-	ErrShortOutput = errors.New("buffer too long: decompressed to fewer bytes than expected, indicating possible error in decompression. Make sure your out buffer has the exact length of the decompressed data or pass nil for out")
-	// ErrPartiallyConsumedData is returned if only a subset of the input data was consumed during the decompression
-	ErrPartiallyConsumedData = errors.New("partially consumed data")
-
-	// ErrUnknown returned when the libdeflate returns unexpected enum error
-	ErrUnknown = errors.New("unknown error code from decompressor library")
-)
-
-// Compress the input buffer into the output buffer.
-func Compress(in, out []byte, compressLevel int) (int, []byte, error) {
-	if len(in) == 0 {
-		return 0, out, ErrNoInput
-	}
-	if cap(out) == 0 {
-		return 0, out, ErrShortBuffer
-	}
-
-	if compressLevel < 1 {
-		compressLevel = 1
-	} else if compressLevel > 12 {
-		compressLevel = 12
-	}
-
-	c := C.libdeflate_alloc_compressor(C.int(compressLevel))
-	if C.isNull(unsafe.Pointer(c)) == 1 {
-		return 0, out, ErrOutOfMemory
-	}
-	defer func() {
-		C.libdeflate_free_compressor(c)
-	}()
-	inAddr := startMemAddr(in)
-	outAddr := startMemAddr(out)
-
-	written := int(C.libdeflate_gzip_compress(c, unsafe.Pointer(inAddr), C.size_t(len(in)), unsafe.Pointer(outAddr), C.size_t(cap(out))))
-
-	if written == 0 {
-		return written, out, ErrShortBuffer
-	}
-	return written, out[:written], nil
-}
-
-// Decompress decompresses the input buffer data into the output buffer.
-func Decompress(in, out []byte) ([]byte, error) {
-	if len(in) == 0 {
-		return out, ErrNoInput
-	}
-	if cap(out) == 0 {
-		return out, ErrShortBuffer
-	}
-	dc := C.libdeflate_alloc_decompressor()
-	if C.isNull(unsafe.Pointer(dc)) == 1 {
-		return out, ErrOutOfMemory
-	}
-	defer func() {
-		C.libdeflate_free_decompressor(dc)
-	}()
-
-	inAddr := startMemAddr(in)
-	outAddr := startMemAddr(out)
-
-	var actualInBytes C.size_t
-	var actualOutBytes C.size_t
-	r := C.libdeflate_gzip_decompress_ex(dc, unsafe.Pointer(inAddr), C.size_t(len(in)), unsafe.Pointer(outAddr), C.size_t(cap(out)), &actualInBytes, &actualOutBytes)
-
-	runtime.KeepAlive(&actualInBytes)
-	runtime.KeepAlive(&actualOutBytes)
-	switch r {
-	case C.LIBDEFLATE_SUCCESS:
-		if actualInBytes != C.size_t(len(in)) {
-			// return an error if not all the data was consumed.
-			return out, ErrPartiallyConsumedData
-		}
-		return out[:actualOutBytes], nil
-	case C.LIBDEFLATE_BAD_DATA:
-		return out, ErrBadData
-	case C.LIBDEFLATE_SHORT_OUTPUT:
-		return out, ErrShortOutput
-	case C.LIBDEFLATE_INSUFFICIENT_SPACE:
-		return out, ErrInsufficientSpace
-	default:
-		return out, ErrUnknown
-	}
-}
-
-func startMemAddr(b []byte) *byte {
-	if len(b) > 0 {
-		return &b[0]
-	}
-
-	b = append(b, 0)
-	ptr := &b[0]
-
-	return ptr
-}
-
-func init() {
-	// initialize dispatch tables. This is important since we want to avoid race conditions when running the dispatch over multiple cores.
-	decompressedBuffer := []byte{1, 2, 3, 4}
-	compressedBuffer := make([]byte, 128)
-	_, compressedOutput, _ := Compress(decompressedBuffer, compressedBuffer, 9)
-	decompressedBuffer = make([]byte, 128)
-	Decompress(compressedOutput, decompressedBuffer) //nolint:errcheck // static call that won't fail
-}