Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/SevenZip/src/7z.h

@@ -0,0 +1,203 @@
+/* 7z.h -- 7z interface
+2010-03-11 : Igor Pavlov : Public domain */
+
+#ifndef __7Z_H
+#define __7Z_H
+
+#include "7zBuf.h"
+
+EXTERN_C_BEGIN
+
+#define k7zStartHeaderSize 0x20
+#define k7zSignatureSize 6
+extern Byte k7zSignature[k7zSignatureSize];
+#define k7zMajorVersion 0
+
+enum EIdEnum
+{
+  k7zIdEnd,
+  k7zIdHeader,
+  k7zIdArchiveProperties,
+  k7zIdAdditionalStreamsInfo,
+  k7zIdMainStreamsInfo,
+  k7zIdFilesInfo,
+  k7zIdPackInfo,
+  k7zIdUnpackInfo,
+  k7zIdSubStreamsInfo,
+  k7zIdSize,
+  k7zIdCRC,
+  k7zIdFolder,
+  k7zIdCodersUnpackSize,
+  k7zIdNumUnpackStream,
+  k7zIdEmptyStream,
+  k7zIdEmptyFile,
+  k7zIdAnti,
+  k7zIdName,
+  k7zIdCTime,
+  k7zIdATime,
+  k7zIdMTime,
+  k7zIdWinAttributes,
+  k7zIdComment,
+  k7zIdEncodedHeader,
+  k7zIdStartPos,
+  k7zIdDummy
+};
+
+typedef struct
+{
+  UInt32 NumInStreams;
+  UInt32 NumOutStreams;
+  UInt64 MethodID;
+  CBuf Props;
+} CSzCoderInfo;
+
+void SzCoderInfo_Init(CSzCoderInfo *p);
+void SzCoderInfo_Free(CSzCoderInfo *p, ISzAlloc *alloc);
+
+typedef struct
+{
+  UInt32 InIndex;
+  UInt32 OutIndex;
+} CSzBindPair;
+
+typedef struct
+{
+  CSzCoderInfo *Coders;
+  CSzBindPair *BindPairs;
+  UInt32 *PackStreams;
+  UInt64 *UnpackSizes;
+  UInt32 NumCoders;
+  UInt32 NumBindPairs;
+  UInt32 NumPackStreams;
+  int UnpackCRCDefined;
+  UInt32 UnpackCRC;
+
+  UInt32 NumUnpackStreams;
+} CSzFolder;
+
+void SzFolder_Init(CSzFolder *p);
+UInt64 SzFolder_GetUnpackSize(CSzFolder *p);
+int SzFolder_FindBindPairForInStream(CSzFolder *p, UInt32 inStreamIndex);
+UInt32 SzFolder_GetNumOutStreams(CSzFolder *p);
+UInt64 SzFolder_GetUnpackSize(CSzFolder *p);
+
+SRes SzFolder_Decode(const CSzFolder *folder, const UInt64 *packSizes,
+    ILookInStream *stream, UInt64 startPos,
+    Byte *outBuffer, size_t outSize, ISzAlloc *allocMain);
+
+typedef struct
+{
+  UInt32 Low;
+  UInt32 High;
+} CNtfsFileTime;
+
+typedef struct
+{
+  CNtfsFileTime MTime;
+  UInt64 Size;
+  UInt32 Crc;
+  UInt32 Attrib;
+  Byte HasStream;
+  Byte IsDir;
+  Byte IsAnti;
+  Byte CrcDefined;
+  Byte MTimeDefined;
+  Byte AttribDefined;
+} CSzFileItem;
+
+void SzFile_Init(CSzFileItem *p);
+
+typedef struct
+{
+  UInt64 *PackSizes;
+  Byte *PackCRCsDefined;
+  UInt32 *PackCRCs;
+  CSzFolder *Folders;
+  CSzFileItem *Files;
+  UInt32 NumPackStreams;
+  UInt32 NumFolders;
+  UInt32 NumFiles;
+} CSzAr;
+
+void SzAr_Init(CSzAr *p);
+void SzAr_Free(CSzAr *p, ISzAlloc *alloc);
+
+
+/*
+  SzExtract extracts file from archive
+
+  *outBuffer must be 0 before first call for each new archive.
+
+  Extracting cache:
+    If you need to decompress more than one file, you can send
+    these values from previous call:
+      *blockIndex,
+      *outBuffer,
+      *outBufferSize
+    You can consider "*outBuffer" as cache of solid block. If your archive is solid,
+    it will increase decompression speed.
+  
+    If you use external function, you can declare these 3 cache variables
+    (blockIndex, outBuffer, outBufferSize) as static in that external function.
+    
+    Free *outBuffer and set *outBuffer to 0, if you want to flush cache.
+*/
+
+typedef struct
+{
+  CSzAr db;
+  
+  UInt64 startPosAfterHeader;
+  UInt64 dataPos;
+
+  UInt32 *FolderStartPackStreamIndex;
+  UInt64 *PackStreamStartPositions;
+  UInt32 *FolderStartFileIndex;
+  UInt32 *FileIndexToFolderIndexMap;
+
+  size_t *FileNameOffsets; /* in 2-byte steps */
+  CBuf FileNames;  /* UTF-16-LE */
+} CSzArEx;
+
+void SzArEx_Init(CSzArEx *p);
+void SzArEx_Free(CSzArEx *p, ISzAlloc *alloc);
+UInt64 SzArEx_GetFolderStreamPos(const CSzArEx *p, UInt32 folderIndex, UInt32 indexInFolder);
+int SzArEx_GetFolderFullPackSize(const CSzArEx *p, UInt32 folderIndex, UInt64 *resSize);
+
+/*
+if dest == NULL, the return value specifies the required size of the buffer,
+  in 16-bit characters, including the null-terminating character.
+if dest != NULL, the return value specifies the number of 16-bit characters that
+  are written to the dest, including the null-terminating character. */
+
+size_t SzArEx_GetFileNameUtf16(const CSzArEx *p, size_t fileIndex, UInt16 *dest);
+
+SRes SzArEx_Extract(
+    const CSzArEx *db,
+    ILookInStream *inStream,
+    UInt32 fileIndex,         /* index of file */
+    UInt32 *blockIndex,       /* index of solid block */
+    Byte **outBuffer,         /* pointer to pointer to output buffer (allocated with allocMain) */
+    size_t *outBufferSize,    /* buffer size for output buffer */
+    size_t *offset,           /* offset of stream for required file in *outBuffer */
+    size_t *outSizeProcessed, /* size of file in *outBuffer */
+    ISzAlloc *allocMain,
+    ISzAlloc *allocTemp);
+
+
+/*
+SzArEx_Open Errors:
+SZ_ERROR_NO_ARCHIVE
+SZ_ERROR_ARCHIVE
+SZ_ERROR_UNSUPPORTED
+SZ_ERROR_MEM
+SZ_ERROR_CRC
+SZ_ERROR_INPUT_EOF
+SZ_ERROR_FAIL
+*/
+
+SRes SzArEx_Open(CSzArEx *p, ILookInStream *inStream, ISzAlloc *allocMain, ISzAlloc *allocTemp);
+
+EXTERN_C_END
+
+#endif