diff options
Diffstat (limited to 'src/WorldStorage/FastNBT.h')
| -rw-r--r-- | src/WorldStorage/FastNBT.h | 70 |
1 files changed, 35 insertions, 35 deletions
diff --git a/src/WorldStorage/FastNBT.h b/src/WorldStorage/FastNBT.h index a23dc7af2..60c9ac293 100644 --- a/src/WorldStorage/FastNBT.h +++ b/src/WorldStorage/FastNBT.h @@ -56,16 +56,16 @@ Structure (all with the tree structure it describes) supports moving in memory ( struct cFastNBTTag { public: - + eTagType m_Type; - + // The following members are indices into the data stream. m_DataLength == 0 if no data available // They must not be pointers, because the datastream may be copied into another AString object in the meantime. size_t m_NameStart; size_t m_NameLength; size_t m_DataStart; size_t m_DataLength; - + // The following members are indices into the array returned; -1 if not valid // They must not be pointers, because pointers would not survive std::vector reallocation int m_Parent; @@ -73,7 +73,7 @@ public: int m_NextSibling; int m_FirstChild; int m_LastChild; - + cFastNBTTag(eTagType a_Type, int a_Parent) : m_Type(a_Type), m_NameStart(0), @@ -119,24 +119,24 @@ class cParsedNBT { public: cParsedNBT(const char * a_Data, size_t a_Length); - + bool IsValid(void) const {return m_IsValid; } - + /** Returns the root tag of the hierarchy. */ int GetRoot(void) const {return 0; } /** Returns the first child of the specified tag, or -1 if none / not applicable. */ int GetFirstChild (int a_Tag) const { return m_Tags[static_cast<size_t>(a_Tag)].m_FirstChild; } - + /** Returns the last child of the specified tag, or -1 if none / not applicable. */ int GetLastChild (int a_Tag) const { return m_Tags[static_cast<size_t>(a_Tag)].m_LastChild; } - + /** Returns the next sibling of the specified tag, or -1 if none. */ int GetNextSibling(int a_Tag) const { return m_Tags[static_cast<size_t>(a_Tag)].m_NextSibling; } - + /** Returns the previous sibling of the specified tag, or -1 if none. */ int GetPrevSibling(int a_Tag) const { return m_Tags[static_cast<size_t>(a_Tag)].m_PrevSibling; } - + /** Returns the length of the tag's data, in bytes. Not valid for Compound or List tags! */ size_t GetDataLength (int a_Tag) const @@ -154,35 +154,35 @@ public: ASSERT(m_Tags[static_cast<size_t>(a_Tag)].m_Type != TAG_Compound); return m_Data + m_Tags[static_cast<size_t>(a_Tag)].m_DataStart; } - + /** Returns the direct child tag of the specified name, or -1 if no such tag. */ int FindChildByName(int a_Tag, const AString & a_Name) const { return FindChildByName(a_Tag, a_Name.c_str(), a_Name.length()); } - + /** Returns the direct child tag of the specified name, or -1 if no such tag. */ int FindChildByName(int a_Tag, const char * a_Name, size_t a_NameLength = 0) const; /** Returns the child tag of the specified path (Name1 / Name2 / Name3...), or -1 if no such tag. */ int FindTagByPath(int a_Tag, const AString & a_Path) const; - + eTagType GetType(int a_Tag) const { return m_Tags[static_cast<size_t>(a_Tag)].m_Type; } - + /** Returns the children type for a List tag; undefined on other tags. If list empty, returns TAG_End. */ eTagType GetChildrenType(int a_Tag) const { ASSERT(m_Tags[static_cast<size_t>(a_Tag)].m_Type == TAG_List); return (m_Tags[static_cast<size_t>(a_Tag)].m_FirstChild < 0) ? TAG_End : m_Tags[static_cast<size_t>(m_Tags[static_cast<size_t>(a_Tag)].m_FirstChild)].m_Type; } - + /** Returns the value stored in a Byte tag. Not valid for any other tag type. */ inline unsigned char GetByte(int a_Tag) const { ASSERT(m_Tags[static_cast<size_t>(a_Tag)].m_Type == TAG_Byte); return static_cast<unsigned char>(m_Data[static_cast<size_t>(m_Tags[static_cast<size_t>(a_Tag)].m_DataStart)]); } - + /** Returns the value stored in a Short tag. Not valid for any other tag type. */ inline Int16 GetShort(int a_Tag) const { @@ -208,20 +208,20 @@ public: inline float GetFloat(int a_Tag) const { ASSERT(m_Tags[static_cast<size_t>(a_Tag)].m_Type == TAG_Float); - + // Cause a compile-time error if sizeof(float) != 4 // If your platform produces a compiler error here, you'll need to add code that manually decodes 32-bit floats char Check1[5 - sizeof(float)]; // Fails if sizeof(float) > 4 char Check2[sizeof(float) - 3]; // Fails if sizeof(float) < 4 UNUSED_VAR(Check1); UNUSED_VAR(Check2); - + Int32 i = GetBEInt(m_Data + m_Tags[static_cast<size_t>(a_Tag)].m_DataStart); float f; memcpy(&f, &i, sizeof(f)); return f; } - + /** Returns the value stored in a Double tag. Not valid for any other tag type. */ inline double GetDouble(int a_Tag) const { @@ -235,7 +235,7 @@ public: ASSERT(m_Tags[static_cast<size_t>(a_Tag)].m_Type == TAG_Double); return NetworkToHostDouble8(m_Data + m_Tags[static_cast<size_t>(a_Tag)].m_DataStart); } - + /** Returns the value stored in a String tag. Not valid for any other tag type. */ inline AString GetString(int a_Tag) const { @@ -244,7 +244,7 @@ public: res.assign(m_Data + m_Tags[static_cast<size_t>(a_Tag)].m_DataStart, static_cast<size_t>(m_Tags[static_cast<size_t>(a_Tag)].m_DataLength)); return res; } - + /** Returns the tag's name. For tags that are not named, returns an empty string. */ inline AString GetName(int a_Tag) const { @@ -252,7 +252,7 @@ public: res.assign(m_Data + m_Tags[static_cast<size_t>(a_Tag)].m_NameStart, static_cast<size_t>(m_Tags[static_cast<size_t>(a_Tag)].m_NameLength)); return res; } - + protected: const char * m_Data; size_t m_Length; @@ -277,13 +277,13 @@ class cFastNBTWriter { public: cFastNBTWriter(const AString & a_RootTagName = ""); - + void BeginCompound(const AString & a_Name); void EndCompound(void); - + void BeginList(const AString & a_Name, eTagType a_ChildrenType); void EndList(void); - + void AddByte (const AString & a_Name, unsigned char a_Value); void AddShort (const AString & a_Name, Int16 a_Value); void AddInt (const AString & a_Name, Int32 a_Value); @@ -298,11 +298,11 @@ public: { AddByteArray(a_Name, a_Value.data(), a_Value.size()); } - + const AString & GetResult(void) const {return m_Result; } - + void Finish(void); - + protected: struct sParent @@ -312,24 +312,24 @@ protected: int m_Count; // for TAG_List, the element count eTagType m_ItemType; // for TAG_List, the element type } ; - + static const int MAX_STACK = 50; // Highly doubtful that an NBT would be constructed this many levels deep - + // These two fields emulate a stack. A raw array is used due to speed issues - no reallocations are allowed. sParent m_Stack[MAX_STACK]; int m_CurrentStack; - + AString m_Result; - + bool IsStackTopCompound(void) const { return (m_Stack[m_CurrentStack].m_Type == TAG_Compound); } - + void WriteString(const char * a_Data, UInt16 a_Length); - + inline void TagCommon(const AString & a_Name, eTagType a_Type) { // If we're directly inside a list, check that the list is of the correct type: ASSERT((m_Stack[m_CurrentStack].m_Type != TAG_List) || (m_Stack[m_CurrentStack].m_ItemType == a_Type)); - + if (IsStackTopCompound()) { // Compound: add the type and name: |