From 57afa36795f478d0f9b069ad19b578761e3fb16a Mon Sep 17 00:00:00 2001 From: Cyan4973 Date: Fri, 13 Apr 2018 01:01:54 -0700 Subject: compatibility with gcc-4.4 string.h version Someone found it would be a great idea to define there a global variable under the very generic name "index". Cause problem with shadow warnings, so no variable can be named "index" now ... Also : automatically update API manual --- doc/lz4_manual.html | 94 ++++++++++++++++++++++++++++++++++++++++------------- lib/lz4.c | 6 ++-- 2 files changed, 75 insertions(+), 25 deletions(-) diff --git a/doc/lz4_manual.html b/doc/lz4_manual.html index d14467f..f8639fe 100644 --- a/doc/lz4_manual.html +++ b/doc/lz4_manual.html @@ -15,8 +15,9 @@
  • Advanced Functions
  • Streaming Compression Functions
  • Streaming Decompression Functions
    • -
  • Private definitions
    • -
  • Obsolete Functions
    • +
  • Unstable declarations
    • +
  • Private definitions
    • +
  • Obsolete Functions

    • Introduction

    @@ -245,22 +246,80 @@ int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize,

    -

    Private definitions

    +
    Unstable declarations
    + Declarations in this section should be considered unstable.
+ Use at your own peril, etc., etc.
+ They may be removed in the future.
+ Their signatures may change.
+
    
+
+
    void LZ4_resetStream_fast (LZ4_stream_t* streamPtr);
+
      When an LZ4_stream_t is known to be in a internally coherent state,
+  it can often be prepared for a new compression with almost no work, only
+  sometimes falling back to the full, expensive reset that is always required
+  when the stream is in an indeterminate state (i.e., the reset performed by
+  LZ4_resetStream()).
+
+  LZ4_streams are guaranteed to be in a valid state when:
+  - returned from LZ4_createStream()
+  - reset by LZ4_resetStream()
+  - memset(stream, 0, sizeof(LZ4_stream_t))
+  - the stream was in a valid state and was reset by LZ4_resetStream_fast()
+  - the stream was in a valid state and was then used in any compression call
+    that returned success
+  - the stream was in an indeterminate state and was used in a compression
+    call that fully reset the state (LZ4_compress_fast_extState()) and that
+    returned success
+ 
+

    
+
+
    int LZ4_compress_fast_extState_fastReset (void* state, const char* src, char* dst, int srcSize, int dstCapacity, int acceleration);
+
      A variant of LZ4_compress_fast_extState().
+
+  Using this variant avoids an expensive initialization step. It is only safe
+  to call if the state buffer is known to be correctly initialized already
+  (see above comment on LZ4_resetStream_fast() for a definition of "correctly
+  initialized"). From a high level, the difference is that this function
+  initializes the provided state with a call to LZ4_resetStream_fast() while
+  LZ4_compress_fast_extState() starts with a call to LZ4_resetStream().
+ 
+

    
+
+
    void LZ4_attach_dictionary(LZ4_stream_t *working_stream, const LZ4_stream_t *dictionary_stream);
+
      This is an experimental API that allows for the efficient use of a
+  static dictionary many times.
+
+  Rather than re-loading the dictionary buffer into a working context before
+  each compression, or copying a pre-loaded dictionary's LZ4_stream_t into a
+  working LZ4_stream_t, this function introduces a no-copy setup mechanism,
+  in which the working stream references the dictionary stream in-place.
+
+  Several assumptions are made about the state of the dictionary stream.
+  Currently, only streams which have been prepared by LZ4_loadDict() should
+  be expected to work.
+
+  Alternatively, the provided dictionary stream pointer may be NULL, in which
+  case any existing dictionary stream is unset.
+
+  If a dictionary is provided, it replaces any pre-existing stream history.
+  The dictionary contents are the only history that can be referenced and
+  logically immediately precede the data compressed in the first subsequent
+  compression call.
+
+  The dictionary will only remain attached to the working stream through the
+  first compression call, at the end of which it is cleared. The dictionary
+  stream (and source buffer) must remain in-place / accessible / unchanged
+  through the completion of the first compression call on the stream.
+ 
+

    
+
+
    Private definitions
      Do not use these definitions.
  They are exposed to allow static allocation of `LZ4_stream_t` and `LZ4_streamDecode_t`.
  Using these definitions will expose code to API and/or ABI break in future versions of the library.
 
    
 
 
    typedef struct {
-    uint32_t hashTable[LZ4_HASH_SIZE_U32];
-    uint32_t currentOffset;
-    uint32_t initCheck;
-    const uint8_t* dictionary;
-    uint8_t* bufferStart;   /* obsolete, used for slideInputBuffer */
-    uint32_t dictSize;
-} LZ4_stream_t_internal;
-

    
-
    typedef struct {
     const uint8_t* externalDict;
     size_t extDictSize;
     const uint8_t* prefixEnd;
@@ -268,15 +327,6 @@ int LZ4_decompress_fast_usingDict (const char* src, char* dst, int originalSize,
 } LZ4_streamDecode_t_internal;
 

    
 
    typedef struct {
-    unsigned int hashTable[LZ4_HASH_SIZE_U32];
-    unsigned int currentOffset;
-    unsigned int initCheck;
-    const unsigned char* dictionary;
-    unsigned char* bufferStart;   /* obsolete, used for slideInputBuffer */
-    unsigned int dictSize;
-} LZ4_stream_t_internal;
-

    
-
    typedef struct {
     const unsigned char* externalDict;
     size_t extDictSize;
     const unsigned char* prefixEnd;
@@ -311,7 +361,7 @@ union LZ4_streamDecode_u {
  
 

    
 
-
    Obsolete Functions
    
+
    Obsolete Functions
    
 
 
    #ifdef LZ4_DISABLE_DEPRECATE_WARNINGS
 #  define LZ4_DEPRECATED(message)   /* disable deprecation warnings */
diff --git a/lib/lz4.c b/lib/lz4.c
index 21892d3..f55e4e1 100644
--- a/lib/lz4.c
+++ b/lib/lz4.c
@@ -517,15 +517,15 @@ LZ4_FORCE_INLINE U32 LZ4_hashPosition(const void* const p, tableType_t const tab
     return LZ4_hash4(LZ4_read32(p), tableType);
 }
 
-static void LZ4_putIndexOnHash(U32 index, U32 h, void* tableBase, tableType_t const tableType)
+static void LZ4_putIndexOnHash(U32 idx, U32 h, void* tableBase, tableType_t const tableType)
 {
     switch (tableType)
     {
     default: /* fallthrough */
     case clearedTable: /* fallthrough */
     case byPtr: { /* illegal! */ assert(0); return; }
-    case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = index; return; }
-    case byU16: { U16* hashTable = (U16*) tableBase; assert(index < 65536); hashTable[h] = (U16)index; return; }
+    case byU32: { U32* hashTable = (U32*) tableBase; hashTable[h] = idx; return; }
+    case byU16: { U16* hashTable = (U16*) tableBase; assert(idx < 65536); hashTable[h] = (U16)idx; return; }
     }
 }
 
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