Windows: reduce size of MBR bootloader by removing unused functions in each build type.

src/Boot/Windows/BootConsoleIo.cpp

@@ -19,17 +19,19 @@
 
 static int ScreenOutputDisabled = 0;
 
+#if defined(TC_TRACE_INT13) || !defined(TC_WINDOWS_BOOT_RESCUE_DISK_MODE)
 void DisableScreenOutput ()
 {
 	++ScreenOutputDisabled;
 }
+#endif
 
-
+#ifdef TC_TRACE_INT13
 void EnableScreenOutput ()
 {
 	--ScreenOutputDisabled;
 }
-
+#endif
 
 void PrintChar (char c)
 {

src/Boot/Windows/BootDiskIo.cpp

@@ -157,6 +157,7 @@ BiosResult ReadWriteSectors (bool write, uint16 bufferSegment, uint16 bufferOffs
 	return result;
 }
 
+#ifdef TC_WINDOWS_BOOT_RESCUE_DISK_MODE
 
 BiosResult ReadWriteSectors (bool write, byte *buffer, byte drive, const ChsAddress &chs, byte sectorCount, bool silent)
 {
@@ -165,18 +166,19 @@ BiosResult ReadWriteSectors (bool write, byte *buffer, byte drive, const ChsAddr
 	return ReadWriteSectors (write, codeSeg, (uint16) buffer, drive, chs, sectorCount, silent);
 }
 
-
 BiosResult ReadSectors (byte *buffer, byte drive, const ChsAddress &chs, byte sectorCount, bool silent)
 {
 	return ReadWriteSectors (false, buffer, drive, chs, sectorCount, silent);
 }
 
-
+#if 0
 BiosResult WriteSectors (byte *buffer, byte drive, const ChsAddress &chs, byte sectorCount, bool silent)
 {
 	return ReadWriteSectors (true, buffer, drive, chs, sectorCount, silent);
 }
+#endif
 
+#endif
 
 static BiosResult ReadWriteSectors (bool write, BiosLbaPacket &dapPacket, byte drive, const uint64 &sector, uint16 sectorCount, bool silent)
 {

src/Common/Crc.c

@@ -121,6 +121,7 @@ unsigned __int32 GetCrc32 (unsigned char *data, int length)
 	return r ^ 0xFFFFFFFFUL;
 }
 
+#if 0
 BOOL crc32_selftests ()
 {
 	unsigned __int8 testData[32];
@@ -131,5 +132,6 @@ BOOL crc32_selftests ()
 
 	return GetCrc32 (testData, sizeof (testData)) == 0x91267E8AUL;
 }
+#endif
 
 #endif // TC_MINIMIZE_CODE_SIZE

src/Common/Crypto.c

@@ -393,17 +393,13 @@ const wchar_t *CipherGetName (int cipherId)
    Cipher* pCipher = CipherGet (cipherId);
    return  pCipher? pCipher -> Name : L"";
 }
-#endif
 
 int CipherGetBlockSize (int cipherId)
 {
-#ifdef TC_WINDOWS_BOOT
-	return CipherGet (cipherId) -> BlockSize;
-#else
    Cipher* pCipher = CipherGet (cipherId);
    return pCipher? pCipher -> BlockSize : 0;
-#endif
 }
+#endif
 
 int CipherGetKeySize (int cipherId)
 {
@@ -451,6 +447,7 @@ int EAGetFirst ()
 	return 1;
 }
 
+#ifndef TC_WINDOWS_BOOT
 // Returns number of EAs
 int EAGetCount (void)
 {
@@ -462,6 +459,7 @@ int EAGetCount (void)
 	}
 	return count;
 }
+#endif
 
 int EAGetNext (int previousEA)
 {
@@ -593,6 +591,8 @@ int EAGetKeySize (int ea)
 }
 
 
+#ifndef TC_WINDOWS_BOOT
+
 // Returns the first mode of operation of EA
 int EAGetFirstMode (int ea)
 {
@@ -612,9 +612,6 @@ int EAGetNextMode (int ea, int previousModeId)
 	return 0;
 }
 
-
-#ifndef TC_WINDOWS_BOOT
-
 // Returns the name of the mode of operation of the whole EA
 wchar_t *EAGetModeName (int ea, int mode, BOOL capitalLetters)
 {
@@ -645,38 +642,7 @@ int EAGetKeyScheduleSize (int ea)
 	return size;
 }
 
-
+#ifndef TC_WINDOWS_BOOT
-// Returns the largest key size needed by an EA for the specified mode of operation
-int EAGetLargestKeyForMode (int mode)
-{
-	int ea, key = 0;
-
-	for (ea = EAGetFirst (); ea != 0; ea = EAGetNext (ea))
-	{
-		if (!EAIsModeSupported (ea, mode))
-			continue;
-
-		if (EAGetKeySize (ea) >= key)
-			key = EAGetKeySize (ea);
-	}
-	return key;
-}
-
-
-// Returns the largest key needed by any EA for any mode
-int EAGetLargestKey ()
-{
-	int ea, key = 0;
-
-	for (ea = EAGetFirst (); ea != 0; ea = EAGetNext (ea))
-	{
-		if (EAGetKeySize (ea) >= key)
-			key = EAGetKeySize (ea);
-	}
-
-	return key;
-}
-
 
 // Returns number of ciphers in EA
 int EAGetCipherCount (int ea)
@@ -687,6 +653,7 @@ int EAGetCipherCount (int ea)
 	return i - 1;
 }
 
+#endif
 
 int EAGetFirstCipher (int ea)
 {
@@ -732,18 +699,16 @@ int EAGetPreviousCipher (int ea, int previousCipherId)
 	return 0;
 }
 
-
+#ifndef TC_WINDOWS_BOOT
 int EAIsFormatEnabled (int ea)
 {
 	return EncryptionAlgorithms[ea].FormatEnabled;
 }
 
-#ifndef TC_WINDOWS_BOOT
 int EAIsMbrSysEncEnabled (int ea)
 {
 	return EncryptionAlgorithms[ea].MbrSysEncEnabled;
 }
-#endif
 
 // Returns TRUE if the mode of operation is supported for the encryption algorithm
 BOOL EAIsModeSupported (int ea, int testedMode)
@@ -758,7 +723,6 @@ BOOL EAIsModeSupported (int ea, int testedMode)
 	return FALSE;
 }
 
-#ifndef TC_WINDOWS_BOOT
 Hash *HashGet (int id)
 {
 	int i;
@@ -810,6 +774,22 @@ BOOL HashForSystemEncryption (int hashId)
 
 }
 
+// Returns the largest key size needed by an EA for the specified mode of operation
+int EAGetLargestKeyForMode (int mode)
+{
+	int ea, key = 0;
+
+	for (ea = EAGetFirst (); ea != 0; ea = EAGetNext (ea))
+	{
+		if (!EAIsModeSupported (ea, mode))
+			continue;
+
+		if (EAGetKeySize (ea) >= key)
+			key = EAGetKeySize (ea);
+	}
+	return key;
+}
+
 // Returns the maximum number of bytes necessary to be generated by the PBKDF2 (PKCS #5)
 int GetMaxPkcs5OutSize (void)
 {

src/Common/Crypto.h

@@ -354,8 +354,8 @@ int EAGetFirstCipher (int ea);
 int EAGetLastCipher (int ea);
 int EAGetNextCipher (int ea, int previousCipherId);
 int EAGetPreviousCipher (int ea, int previousCipherId);
-int EAIsFormatEnabled (int ea);
 #ifndef TC_WINDOWS_BOOT
+int EAIsFormatEnabled (int ea);
 int EAIsMbrSysEncEnabled (int ea);
 #endif
 BOOL EAIsModeSupported (int ea, int testedMode);

src/Common/Endian.c

@@ -43,17 +43,3 @@ uint64 MirrorBytes64 (uint64 x)
 }
 #endif
 
-void
-LongReverse (unsigned __int32 *buffer, unsigned byteCount)
-{
-	unsigned __int32 value;
-
-	byteCount /= sizeof (unsigned __int32);
-	while (byteCount--)
-	{
-		value = *buffer;
-		value = ((value & 0xFF00FF00L) >> 8) | \
-		    ((value & 0x00FF00FFL) << 8);
-		*buffer++ = (value << 16) | (value >> 16);
-	}
-}

src/Common/Endian.h

@@ -140,7 +140,6 @@ unsigned __int32 MirrorBytes32 (unsigned __int32 x);
 #ifndef TC_NO_COMPILER_INT64
 uint64 MirrorBytes64 (uint64 x);
 #endif
-void LongReverse ( unsigned __int32 *buffer , unsigned byteCount );
 
 #if defined(__cplusplus)
 }

src/Common/Pkcs5.c

@@ -36,18 +36,6 @@
 #include "Pkcs5.h"
 #include "Crypto.h"
 
-void hmac_truncate
-  (
-	  char *d1,		/* data to be truncated */
-	  char *d2,		/* truncated data */
-	  int len		/* length in bytes to keep */
-)
-{
-	int i;
-	for (i = 0; i < len; i++)
-		d2[i] = d1[i];
-}
-
 #if !defined(TC_WINDOWS_BOOT) || defined(TC_WINDOWS_BOOT_SHA2)
 
 typedef struct hmac_sha256_ctx_struct