From 97d8e65dc839362cb55c65b3ae71caf15e55c4bb Mon Sep 17 00:00:00 2001
From: Nathan Moinvaziri <nathan@nathanm.com>
Date: Thu, 26 Oct 2023 11:51:43 -0700
Subject: [PATCH] Match default compression level value in compress streams
 #726

---
 mz_strm_bzip.c | 2 +-
 mz_strm_lzma.c | 2 +-
 mz_strm_zlib.c | 5 ++++-
 mz_strm_zstd.c | 2 +-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/mz_strm_bzip.c b/mz_strm_bzip.c
index 331f3cda..c169998e 100644
--- a/mz_strm_bzip.c
+++ b/mz_strm_bzip.c
@@ -326,7 +326,7 @@ int32_t mz_stream_bzip_set_prop_int64(void *stream, int32_t prop, int64_t value)
     mz_stream_bzip *bzip = (mz_stream_bzip *)stream;
     switch (prop) {
     case MZ_STREAM_PROP_COMPRESS_LEVEL:
-        if (value < 0)
+        if (value == MZ_COMPRESS_LEVEL_DEFAULT)
             bzip->level = 6;
         else
             bzip->level = (int16_t)value;
diff --git a/mz_strm_lzma.c b/mz_strm_lzma.c
index 951546e9..5bedb720 100644
--- a/mz_strm_lzma.c
+++ b/mz_strm_lzma.c
@@ -415,7 +415,7 @@ int32_t mz_stream_lzma_set_prop_int64(void *stream, int32_t prop, int64_t value)
     mz_stream_lzma *lzma = (mz_stream_lzma *)stream;
     switch (prop) {
     case MZ_STREAM_PROP_COMPRESS_LEVEL:
-        if (value < 0 || value > 9)
+        if (value == MZ_COMPRESS_LEVEL_DEFAULT)
             lzma->preset = LZMA_PRESET_DEFAULT;
         else
             lzma->preset = (uint32_t)value;
diff --git a/mz_strm_zlib.c b/mz_strm_zlib.c
index 0cfc0611..cba63fb2 100644
--- a/mz_strm_zlib.c
+++ b/mz_strm_zlib.c
@@ -347,7 +347,10 @@ int32_t mz_stream_zlib_set_prop_int64(void *stream, int32_t prop, int64_t value)
     mz_stream_zlib *zlib = (mz_stream_zlib *)stream;
     switch (prop) {
     case MZ_STREAM_PROP_COMPRESS_LEVEL:
-        zlib->level = (int16_t)value;
+        if (value == MZ_COMPRESS_LEVEL_DEFAULT)
+            zlib->level = Z_DEFAULT_COMPRESSION;
+        else
+            zlib->level = (int16_t)value;
         break;
     case MZ_STREAM_PROP_TOTAL_IN_MAX:
         zlib->max_total_in = value;
diff --git a/mz_strm_zstd.c b/mz_strm_zstd.c
index 5d49bbe7..d009d5a3 100644
--- a/mz_strm_zstd.c
+++ b/mz_strm_zstd.c
@@ -312,7 +312,7 @@ int32_t mz_stream_zstd_set_prop_int64(void *stream, int32_t prop, int64_t value)
     mz_stream_zstd *zstd = (mz_stream_zstd *)stream;
     switch (prop) {
     case MZ_STREAM_PROP_COMPRESS_LEVEL:
-        if (value < 0)
+        if (value == MZ_COMPRESS_LEVEL_DEFAULT)
             zstd->preset = ZSTD_CLEVEL_DEFAULT;
         else
             zstd->preset = (int16_t)value;