Checked in part of MDE library instances following PI and UEFI. It includes:

[mirror_edk2.git] / MdePkg / Library / BaseUefiDecompressLib / BaseUefiDecompressLib.c

diff --git a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
index c0c79c7c4a87097e2caa99f6f95df2ef194671d5..36d9a47e722d5208b8bce8aeef11ffb877c93ff6 100644 (file)
--- a/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
+++ b/MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.c
@@ -15,58 +15,20 @@
 **/\r
 \r
 //\r
-// Decompression algorithm begins here\r
+// The package level header files this module uses\r
+//\r
+#include <Base.h>\r
+//\r
+// The protocols, PPI and GUID defintions for this module\r
 //\r
-#define BITBUFSIZ 32\r
-#define MAXMATCH  256\r
-#define THRESHOLD 3\r
-#define CODE_BIT  16\r
-#define BAD_TABLE - 1\r
-\r
 //\r
-// C: Char&Len Set; P: Position Set; T: exTra Set\r
+// The Library classes this module consumes\r
 //\r
-#define NC      (0xff + MAXMATCH + 2 - THRESHOLD)\r
-#define CBIT    9\r
-#define MAXPBIT 5\r
-#define TBIT    5\r
-#define MAXNP   ((1U << MAXPBIT) - 1)\r
-#define NT      (CODE_BIT + 3)\r
-#if NT > MAXNP\r
-#define NPT NT\r
-#else\r
-#define NPT MAXNP\r
-#endif\r
-\r
-typedef struct {\r
-  UINT8   *mSrcBase;  ///< Starting address of compressed data\r
-  UINT8   *mDstBase;  ///< Starting address of decompressed data\r
-  UINT32  mOutBuf;\r
-  UINT32  mInBuf;\r
-\r
-  UINT16  mBitCount;\r
-  UINT32  mBitBuf;\r
-  UINT32  mSubBitBuf;\r
-  UINT16  mBlockSize;\r
-  UINT32  mCompSize;\r
-  UINT32  mOrigSize;\r
-\r
-  UINT16  mBadTableFlag;\r
-\r
-  UINT16  mLeft[2 * NC - 1];\r
-  UINT16  mRight[2 * NC - 1];\r
-  UINT8   mCLen[NC];\r
-  UINT8   mPTLen[NPT];\r
-  UINT16  mCTable[4096];\r
-  UINT16  mPTTable[256];\r
-\r
-  ///\r
-  /// The length of the field 'Position Set Code Length Array Size' in Block Header.\r
-  /// For EFI 1.1 de/compression algorithm, mPBit = 4\r
-  /// For Tiano de/compression algorithm, mPBit = 5\r
-  ///\r
-  UINT8   mPBit;\r
-} SCRATCH_DATA;\r
+#include <Library/UefiDecompressLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/BaseMemoryLib.h>\r
+\r
+#include "BaseUefiDecompressLibInternals.h"\r
 \r
 /**\r
   Read NumOfBit of bits from source into mBitBuf\r
@@ -195,6 +157,9 @@ MakeTable (
   UINT16  Avail;\r
   UINT16  NextCode;\r
   UINT16  Mask;\r
+  UINT16  WordOfStart;\r
+  UINT16  WordOfCount;\r
+\r
 \r
   for (Index = 1; Index <= 16; Index++) {\r
     Count[Index] = 0;\r
@@ -207,7 +172,9 @@ MakeTable (
   Start[1] = 0;\r
 \r
   for (Index = 1; Index <= 16; Index++) {\r
-    Start[Index + 1] = (UINT16) (Start[Index] + (Count[Index] << (16 - Index)));\r
+    WordOfStart = Start[Index];\r
+    WordOfCount = Count[Index];\r
+    Start[Index + 1] = (UINT16) (WordOfStart + (WordOfCount << (16 - Index)));\r
   }\r
 \r
   if (Start[17] != 0) {\r
@@ -627,7 +594,7 @@ Decode (
     // \r
     CharC = DecodeC (Sd);\r
     if (Sd->mBadTableFlag != 0) {\r
-      return ;\r
+      goto Done;\r
     }\r
 \r
     if (CharC < 256) {\r
@@ -635,7 +602,7 @@ Decode (
       // Process an Original character\r
       //\r
       if (Sd->mOutBuf >= Sd->mOrigSize) {\r
-        return ;\r
+        goto Done;\r
       } else {\r
         //\r
         // Write orignal character into mDstBase\r
@@ -666,7 +633,7 @@ Decode (
       while ((INT16) (BytesRemain) >= 0) {\r
         Sd->mDstBase[Sd->mOutBuf++] = Sd->mDstBase[DataIdx++];\r
         if (Sd->mOutBuf >= Sd->mOrigSize) {\r
-          return ;\r
+          goto Done;\r
         }\r
 \r
         BytesRemain--;\r
@@ -674,6 +641,7 @@ Decode (
     }\r
   }\r
 \r
+Done:\r
   return ;\r
 }\r
 \r
@@ -746,7 +714,7 @@ UefiDecompressGetInfo (
 \r
   This function is designed so that the decompression algorithm can be implemented\r
   without using any memory services.  As a result, this function is not allowed to\r
-  call any memory allocation services in its implementation.  It is the caller¡¯s r\r
+  call any memory allocation services in its implementation.  It is the caller's r\r
   esponsibility to allocate and free the Destination and Scratch buffers.\r
   If the compressed source data specified by Source is sucessfully decompressed \r
   into Destination, then RETURN_SUCCESS is returned.  If the compressed source data \r