Warning removal.

I used assertions in case of downcasting.
Changed some var type (like size_t instead of int).
Changed DecompressZLib and DecompressBZ2 parameters because
  the underlying lib cannot handle decompressing size_t bytes.

ApfsLib/AesXts.cpp

@@ -82,6 +82,10 @@ void AesXts::Xor(uint8_t *out, const uint8_t *op1, const uint8_t *op2)
 	val64[1] = op1_64[1] ^ op2_64[1];
 }
 
+#ifdef __clang__
+#pragma clang diagnostic ignored "-Wconditional-uninitialized"
+#endif
+
 void AesXts::MultiplyTweak(uint8_t* tweak)
 {
 	uint8_t cin;
@@ -95,6 +99,6 @@ void AesXts::MultiplyTweak(uint8_t* tweak)
 		tweak[k] = (tweak[k] << 1) | cin;
 		cin = cout;
 	}
-	if (cout)
+	if (cout) // 2018-08 : wrongly reported uninitialized by clang
 		tweak[0] ^= 0x87;
 }

ApfsLib/ApfsContainer.cpp

@@ -30,10 +30,10 @@
 int g_debug = 0;
 bool g_lax = false;
 
-ApfsContainer::ApfsContainer(Device &disk, uint64_t start, uint64_t len) :
+ApfsContainer::ApfsContainer(Device &disk, uint64_t start/*, uint64_t len*/) :
 	m_disk(disk),
 	m_part_start(start),
-	m_part_len(len),
+//	m_part_len(len),
 	m_nodemap_vol(*this),
 	m_nidmap_bt(*this),
 	m_oldmgr_bt(*this),

ApfsLib/ApfsContainer.h

@@ -34,7 +34,7 @@ class BlockDumper;
 class ApfsContainer
 {
 public:
-	ApfsContainer(Device &disk, uint64_t start, uint64_t len);
+	ApfsContainer(Device &disk, uint64_t start/*, uint64_t len*/);
 	~ApfsContainer();
 
 	bool Init();
@@ -55,13 +55,13 @@ class ApfsContainer
 private:
 	Device &m_disk;
 	const uint64_t m_part_start;
-	const uint64_t m_part_len;
+//	const uint64_t m_part_len; // Currently not used.
 
 	std::string m_passphrase;
 
 	APFS_NX_Superblock m_sb;
 
-	APFS_Block_8_5_Spaceman m_spaceman_hdr;
+//	APFS_Block_8_5_Spaceman m_spaceman_hdr;
 	// Block_8_11 ?
 
 	ApfsNodeMapperBTree m_nodemap_vol;

ApfsLib/ApfsDir.cpp

@@ -1,4 +1,4 @@
-/*
+/*
 	This file is part of apfs-fuse, a read-only implementation of APFS
 	(Apple File System) for FUSE.
 	Copyright (C) 2017 Simon Gander
@@ -295,7 +295,6 @@ bool ApfsDir::ReadFile(void* data, uint64_t inode, uint64_t offs, size_t size)
 	uint8_t *bdata = reinterpret_cast<uint8_t *>(data);
 
 	size_t cur_size;
-	unsigned idx;
 
 	while (size > 0)
 	{
@@ -323,7 +322,7 @@ bool ApfsDir::ReadFile(void* data, uint64_t inode, uint64_t offs, size_t size)
 			return false;
 
 		// TODO: 12 is dependent on block size ...
-		idx = (offs - ext_key->logical_addr) >> 12;
+		auto idx = (offs - ext_key->logical_addr) >> 12;
 		// ext_val->size has a mysterious upper byte set. At least sometimes.
 		// Let us clear it.
 		uint64_t extent_size = ext_val->flags_length & 0x00FFFFFFFFFFFFFFULL;

ApfsLib/BTree.cpp

@@ -320,8 +320,6 @@ void BTree::dump(BlockDumper& out)
 
 void BTree::DumpTreeInternal(BlockDumper& out, const std::shared_ptr<BTreeNode> &node)
 {
-	size_t k;
-	size_t cnt;
 	BTreeEntry e;
 	std::shared_ptr<BTreeNode> child;
 	uint64_t nodeid_child;
@@ -334,9 +332,9 @@ void BTree::DumpTreeInternal(BlockDumper& out, const std::shared_ptr<BTreeNode>
 
 	if (node->level() > 0)
 	{
-		cnt = node->entries_cnt();
+		auto cnt = node->entries_cnt();
 
-		for (k = 0; k < cnt; k++)
+		for (decltype(cnt) k = 0; k < cnt; k++)
 		{
 			node->GetEntry(e, k);
 
@@ -490,7 +488,7 @@ int BTree::FindBin(const std::shared_ptr<BTreeNode>& node, const void* key, size
 	int res;
 
 	BTreeEntry e;
-	int rc;
+	int rc = -1; // to silence warning about ch being used uninitialized.
 
 	if (cnt <= 0)
 		return -1;

ApfsLib/BlockDumper.cpp

@@ -432,7 +432,7 @@ void BlockDumper::DumpBTEntry_APFS_Root(const byte_t *key_data, size_t key_lengt
 		{
 			const APFS_Xattr_Val *attr = reinterpret_cast<const APFS_Xattr_Val *>(value_data);
 
-			assert(attr->size + 4 == value_length);
+			assert( decltype(value_length)(attr->size + 4) == value_length); // attr->size + 4 is promoted to int, giving a warning (comparison between signed and unsigned integer expressions). Hence the cast.
 
 			m_os << " => " << attr->type << " " << attr->size;
 

ApfsLib/Crypto.cpp

@@ -9,6 +9,8 @@
 #include <iostream>
 #include <iomanip>
 
+#include <limits.h>
+
 #include "Endian.h"
 
 union Rfc3394_Unit {
@@ -26,7 +28,8 @@ void Rfc3394_KeyWrap(uint8_t *crypto, const uint8_t *plain, size_t size, const u
 	uint64_t r[6];
 	int i;
 	int j;
-	int n = size / sizeof(uint64_t);
+	assert(size / sizeof(uint64_t) <= INT_MAX);
+	int n = int(size / sizeof(uint64_t));
 	uint64_t t;
 	const uint64_t *p = reinterpret_cast<const uint64_t *>(plain);
 	uint64_t *c = reinterpret_cast<uint64_t *>(crypto);
@@ -65,7 +68,8 @@ bool Rfc3394_KeyUnwrap(uint8_t *plain, const uint8_t *crypto, size_t size, const
 	uint64_t r[6];
 	int i;
 	int j;
-	int n = size / sizeof(uint64_t);
+	assert(size / sizeof(uint64_t) <= INT_MAX);
+	int n = int(size / sizeof(uint64_t));
 	uint64_t t;
 	const uint64_t *c = reinterpret_cast<const uint64_t *>(crypto);
 	uint64_t *p = reinterpret_cast<uint64_t *>(plain);

ApfsLib/Decmpfs.cpp

@@ -22,6 +22,8 @@
 #include <cstring>
 #include <cassert>
 
+#include <limits.h>
+
 #include "Decmpfs.h"
 #include "Endian.h"
 
@@ -162,7 +164,8 @@ bool DecompressFile(ApfsDir &dir, uint64_t ino, std::vector<uint8_t> &decompress
 
 				if (src[0] == 0x78)
 				{
-					decoded_bytes = DecompressZLib(dst, 0x10000, src, src_len);
+					assert(src_len <= UINT_MAX);
+					decoded_bytes = DecompressZLib(dst, 0x10000, src, (unsigned int)src_len);
 				}
 				else if ((src[0] & 0x0F) == 0x0F)
 				{
@@ -236,7 +239,9 @@ bool DecompressFile(ApfsDir &dir, uint64_t ino, std::vector<uint8_t> &decompress
 		{
 			if (cdata[0] == 0x78)
 			{
-				decoded_bytes = DecompressZLib(decompressed.data(), decompressed.size(), cdata, csize);
+				assert(decompressed.size() <= UINT_MAX);
+				assert(csize <= UINT_MAX);
+				decoded_bytes = DecompressZLib(decompressed.data(), (unsigned int)decompressed.size(), cdata, (unsigned int)csize);
 			}
 			else if (cdata[0] == 0xFF) // cdata[0] & 0x0F == 0x0F ?
 			{

ApfsLib/DeviceDMG.cpp

@@ -21,6 +21,8 @@ along with apfs-fuse.  If not, see <http://www.gnu.org/licenses/>.
 #include <vector>
 #include <iostream>
 #include <iomanip>
+#include <assert.h>
+#include <limits.h>
 
 #include "DeviceDMG.h"
 #include "Util.h"
@@ -435,10 +437,14 @@ bool DeviceDMG::Read(void * data, uint64_t offs, uint64_t len)
 					DecompressADC(sect.cache, sect.disk_length, compr_buf, sect.dmg_length);
 					break;
 				case 0x80000005:
-					DecompressZLib(sect.cache, sect.disk_length, compr_buf, sect.dmg_length);
+					assert(sect.disk_length <= UINT_MAX);
+					assert(sect.dmg_length <= UINT_MAX);
+					DecompressZLib(sect.cache, (unsigned int)sect.disk_length, compr_buf, (unsigned int)sect.dmg_length);
 					break;
 				case 0x80000006:
-					DecompressBZ2(sect.cache, sect.disk_length, compr_buf, sect.dmg_length);
+					assert(sect.disk_length <= UINT_MAX);
+					assert(sect.dmg_length <= UINT_MAX);
+					DecompressBZ2(sect.cache, (unsigned int)sect.disk_length, compr_buf, (unsigned int)sect.dmg_length);
 					break;
 				case 0x80000007:
 					DecompressLZFSE(sect.cache, sect.disk_length, compr_buf, sect.dmg_length);

ApfsLib/KeyMgmt.cpp

@@ -2,6 +2,8 @@
 #include <iomanip>
 #include <iostream>
 #include <sstream>
+#include <assert.h>
+#include <limits.h>
 
 #include "ApfsContainer.h"
 #include "AesXts.h"
@@ -641,8 +643,8 @@ bool KeyManager::GetVolumeKey(uint8_t* vek, const apfs_uuid_t& volume_uuid, cons
 	uint64_t iv;
 	bool rc = false;
 
-	int cnt = recs_bag.GetKeyCnt();
-	int k;
+	auto cnt = recs_bag.GetKeyCnt();
+	decltype(cnt) k;
 
 	// Check all KEKs for any valid KEK.
 	for (k = 0; k < cnt; k++)
@@ -659,7 +661,8 @@ bool KeyManager::GetVolumeKey(uint8_t* vek, const apfs_uuid_t& volume_uuid, cons
 		if (!DecodeKEKBlob(kek_blob, kek_data))
 			continue;
 
-		PBKDF2_HMAC_SHA256(reinterpret_cast<const uint8_t *>(password), strlen(password), kek_blob.salt, sizeof(kek_blob.salt), kek_blob.iterations, dk, sizeof(dk));
+		assert(kek_blob.iterations <= INT_MAX);
+		PBKDF2_HMAC_SHA256(reinterpret_cast<const uint8_t *>(password), strlen(password), kek_blob.salt, sizeof(kek_blob.salt), int(kek_blob.iterations), dk, sizeof(dk));
 
 		switch (kek_blob.unk_82.unk_00)
 		{
@@ -673,6 +676,7 @@ bool KeyManager::GetVolumeKey(uint8_t* vek, const apfs_uuid_t& volume_uuid, cons
 		default:
 			std::cerr << "Unknown KEK key flags 82/00 = " << std::hex << kek_blob.unk_82.unk_00 << ". Please file a bug report." << std::endl;
 			rc = false;
+			iv = 0; // to silence warning about iv being used uninitialized.
 			break;
 		}
 
@@ -737,6 +741,7 @@ bool KeyManager::GetVolumeKey(uint8_t* vek, const apfs_uuid_t& volume_uuid, cons
 		// Unknown method.
 		std::cerr << "Unknown VEK key flags 82/00 = " << std::hex << vek_blob.unk_82.unk_00 << ". Please file a bug report." << std::endl;
 		rc = false;
+		iv = 0; // to silence the uninitialized warning
 	}
 
 	if (g_debug & Dbg_Crypto)

ApfsLib/Util.cpp

@@ -395,7 +395,7 @@ bool GetPassword(std::string &pw)
 #endif
 }
 
-size_t DecompressZLib(uint8_t *dst, size_t dst_size, const uint8_t *src, size_t src_size)
+size_t DecompressZLib(uint8_t *dst, unsigned int dst_size, const uint8_t *src, unsigned int src_size) // zstream can't take more than unsigned int for src and dst size
 {
 	// size_t nwr = 0;
 	int ret;
@@ -503,7 +503,7 @@ size_t DecompressLZVN(uint8_t * dst, size_t dst_size, const uint8_t * src, size_
 	return static_cast<size_t>(state.dst - dst);
 }
 
-size_t DecompressBZ2(uint8_t * dst, size_t dst_size, const uint8_t * src, size_t src_size)
+size_t DecompressBZ2(uint8_t * dst, unsigned int dst_size, const uint8_t * src, unsigned int src_size) // zstream can't take more than unsigned int for src and dst size
 {
 	bz_stream strm;
 

ApfsLib/Util.h

@@ -43,10 +43,10 @@ int StrCmpUtf8NormalizedFolded(const char *s1, const char *s2, bool case_fold);
 
 bool Utf8toUtf32(std::vector<char32_t> &str32, const char * str);
 
-size_t DecompressZLib(uint8_t *dst, size_t dst_size, const uint8_t *src, size_t src_size);
+size_t DecompressZLib(uint8_t *dst, unsigned int dst_size, const uint8_t *src, unsigned int src_size); // zstream can't take more than unsigned int for src and dst size
 size_t DecompressADC(uint8_t *dst, size_t dst_size, const uint8_t *src, size_t src_size);
 size_t DecompressLZVN(uint8_t *dst, size_t dst_size, const uint8_t *src, size_t src_size);
-size_t DecompressBZ2(uint8_t *dst, size_t dst_size, const uint8_t *src, size_t src_size);
+size_t DecompressBZ2(uint8_t *dst, unsigned int dst_size, const uint8_t *src, unsigned int src_size); // bz_stream can't take more than unsigned int for src and dst size
 size_t DecompressLZFSE(uint8_t *dst, size_t dst_size, const uint8_t *src, size_t src_size);
 
 bool GetPassword(std::string &pw);