From 9cf0aac13097807dca468735fe84eba111b0fb9d Mon Sep 17 00:00:00 2001
From: Timothy Arceri <tarceri@itsqueeze.com>
Date: Mon, 15 Mar 2021 16:06:08 +1100
Subject: [PATCH] util/compress: make compression function inputs const

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9443>
---
 src/util/compress.c | 9 +++++++--
 src/util/compress.h | 4 ++--
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/src/util/compress.c b/src/util/compress.c
index a3fe21345a1..8b86b9d9305 100644
--- a/src/util/compress.c
+++ b/src/util/compress.c
@@ -23,6 +23,11 @@
 
 #include <assert.h>
 
+/* Ensure that zlib uses 'const' in 'z_const' declarations. */
+#ifndef ZLIB_CONST
+#define ZLIB_CONST
+#endif
+
 #include "zlib.h"
 
 #ifdef HAVE_ZSTD
@@ -59,7 +64,7 @@ util_compress_max_compressed_len(size_t in_data_size)
 
 /* Compress data and return the size of the compressed data */
 size_t
-util_compress_deflate(uint8_t *in_data, size_t in_data_size,
+util_compress_deflate(const uint8_t *in_data, size_t in_data_size,
                       uint8_t *out_data, size_t out_buff_size)
 {
 #ifdef HAVE_ZSTD
@@ -107,7 +112,7 @@ util_compress_deflate(uint8_t *in_data, size_t in_data_size,
  * Decompresses data, returns true if successful.
  */
 bool
-util_compress_inflate(uint8_t *in_data, size_t in_data_size,
+util_compress_inflate(const uint8_t *in_data, size_t in_data_size,
                       uint8_t *out_data, size_t out_data_size)
 {
 #ifdef HAVE_ZSTD
diff --git a/src/util/compress.h b/src/util/compress.h
index d93923379b8..1dcd4a8f982 100644
--- a/src/util/compress.h
+++ b/src/util/compress.h
@@ -28,9 +28,9 @@ size_t
 util_compress_max_compressed_len(size_t in_data_size);
 
 bool
-util_compress_inflate(uint8_t *in_data, size_t in_data_size,
+util_compress_inflate(const uint8_t *in_data, size_t in_data_size,
                       uint8_t *out_data, size_t out_data_size);
 
 size_t
-util_compress_deflate(uint8_t *in_data, size_t in_data_size,
+util_compress_deflate(const uint8_t *in_data, size_t in_data_size,
                       uint8_t *out_data, size_t out_buff_size);