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-rw-r--r--src/StringUtils.cpp30
-rw-r--r--src/StringUtils.h9
-rw-r--r--src/WorldStorage/FastNBT.cpp10
3 files changed, 44 insertions, 5 deletions
diff --git a/src/StringUtils.cpp b/src/StringUtils.cpp
index f7aeeed26..5c6b99d88 100644
--- a/src/StringUtils.cpp
+++ b/src/StringUtils.cpp
@@ -764,3 +764,33 @@ AString Base64Decode(const AString & a_Base64String)
+
+short GetBEShort(const char * a_Mem)
+{
+ return (((short)a_Mem[0]) << 8) | a_Mem[1];
+}
+
+
+
+
+
+int GetBEInt(const char * a_Mem)
+{
+ return (((int)a_Mem[0]) << 24) | (((int)a_Mem[1]) << 16) | (((int)a_Mem[2]) << 8) | a_Mem[3];
+}
+
+
+
+
+
+void SetBEInt(char * a_Mem, Int32 a_Value)
+{
+ a_Mem[0] = a_Value >> 24;
+ a_Mem[1] = (a_Value >> 16) & 0xff;
+ a_Mem[2] = (a_Value >> 8) & 0xff;
+ a_Mem[3] = a_Value & 0xff;
+}
+
+
+
+
diff --git a/src/StringUtils.h b/src/StringUtils.h
index 3917cc4ec..471e843e4 100644
--- a/src/StringUtils.h
+++ b/src/StringUtils.h
@@ -81,6 +81,15 @@ extern AString ReplaceAllCharOccurrences(const AString & a_String, char a_From,
/// Decodes a Base64-encoded string into the raw data
extern AString Base64Decode(const AString & a_Base64String);
+/// Reads two bytes from the specified memory location and interprets them as BigEndian short
+extern short GetBEShort(const char * a_Mem);
+
+/// Reads four bytes from the specified memory location and interprets them as BigEndian int
+extern int GetBEInt(const char * a_Mem);
+
+/// Writes four bytes to the specified memory location so that they interpret as BigEndian int
+extern void SetBEInt(char * a_Mem, Int32 a_Value);
+
// If you have any other string helper functions, declare them here
diff --git a/src/WorldStorage/FastNBT.cpp b/src/WorldStorage/FastNBT.cpp
index e55011069..64220f09a 100644
--- a/src/WorldStorage/FastNBT.cpp
+++ b/src/WorldStorage/FastNBT.cpp
@@ -80,7 +80,7 @@ bool cParsedNBT::ReadString(int & a_StringStart, int & a_StringLen)
{
NEEDBYTES(2);
a_StringStart = m_Pos + 2;
- a_StringLen = ntohs(*((short *)(m_Data + m_Pos)));
+ a_StringLen = GetBEShort(m_Data + m_Pos);
if (a_StringLen < 0)
{
// Invalid string length
@@ -135,7 +135,7 @@ bool cParsedNBT::ReadList(eTagType a_ChildrenType)
// Read the count:
NEEDBYTES(4);
- int Count = ntohl(*((int *)(m_Data + m_Pos)));
+ int Count = GetBEInt(m_Data + m_Pos);
m_Pos += 4;
if (Count < 0)
{
@@ -197,7 +197,7 @@ bool cParsedNBT::ReadTag(void)
case TAG_ByteArray:
{
NEEDBYTES(4);
- int len = ntohl(*((int *)(m_Data + m_Pos)));
+ int len = GetBEInt(m_Data + m_Pos);
m_Pos += 4;
if (len < 0)
{
@@ -229,7 +229,7 @@ bool cParsedNBT::ReadTag(void)
case TAG_IntArray:
{
NEEDBYTES(4);
- int len = ntohl(*((int *)(m_Data + m_Pos)));
+ int len = GetBEInt(m_Data + m_Pos);
m_Pos += 4;
if (len < 0)
{
@@ -401,7 +401,7 @@ void cFastNBTWriter::EndList(void)
ASSERT(m_Stack[m_CurrentStack].m_Type == TAG_List);
// Update the list count:
- *((int *)(m_Result.c_str() + m_Stack[m_CurrentStack].m_Pos)) = htonl(m_Stack[m_CurrentStack].m_Count);
+ SetBEInt((char *)(m_Result.c_str() + m_Stack[m_CurrentStack].m_Pos), m_Stack[m_CurrentStack].m_Count);
--m_CurrentStack;
}