From 0569a68edd58d741e46ec1e50d6dd936de77dbfa Mon Sep 17 00:00:00 2001
From: Yann Collet <yann.collet.73@gmail.com>
Date: Wed, 17 Dec 2014 12:20:17 +0100
Subject: C90 compatibility

---
 NEWS             |  1 +
 lib/xxhash.c     | 27 +++++++++++++--------------
 programs/bench.c |  4 ++--
 3 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/NEWS b/NEWS
index 0b90665..bf7efe9 100644
--- a/NEWS
+++ b/NEWS
@@ -3,6 +3,7 @@ New : lz4frame API is now integrated into liblz4
 Fixed : GCC 4.9 bug on highest performance settings, reported by Greg Slazinski
 Fixed : bug within LZ4 HC streaming mode, reported by James Boyle
 Fixed : older compiler don't like nameless unions, reported by Cheyi Lin
+Changed : lz4 is C90 compatible
 
 r125:
 Changed : endian and alignment code
diff --git a/lib/xxhash.c b/lib/xxhash.c
index 7aff1fa..a3ee31c 100644
--- a/lib/xxhash.c
+++ b/lib/xxhash.c
@@ -49,7 +49,6 @@ You can contact the author at :
 /* XXH_ACCEPT_NULL_INPUT_POINTER :
  * If the input pointer is a null pointer, xxHash default behavior is to trigger a memory access error, since it is a bad pointer.
  * When this option is enabled, xxHash output for null input pointers will be the same as a null-length input.
- * This option has a very small performance cost (only measurable on small inputs).
  * By default, this option is disabled. To enable it, uncomment below define :
  */
 /* #define XXH_ACCEPT_NULL_INPUT_POINTER 1 */
@@ -68,19 +67,19 @@ You can contact the author at :
 /**************************************
 *  Compiler Specific Options
 ***************************************/
-/* Disable some Visual warning messages */
-#ifdef _MSC_VER
-#  pragma warning(disable : 4127)      /* disable: C4127: conditional expression is constant */
-#endif
-
 #ifdef _MSC_VER    /* Visual Studio */
+#  pragma warning(disable : 4127)      /* disable: C4127: conditional expression is constant */
 #  define FORCE_INLINE static __forceinline
 #else
-#  ifdef __GNUC__
-#    define FORCE_INLINE static inline __attribute__((always_inline))
+#  if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L   /* C99 */
+#    ifdef __GNUC__
+#      define FORCE_INLINE static inline __attribute__((always_inline))
+#    else
+#      define FORCE_INLINE static inline
+#    endif
 #  else
-#    define FORCE_INLINE static inline
-#  endif
+#    define FORCE_INLINE static
+#  endif /* __STDC_VERSION__ */
 #endif
 
 
@@ -171,14 +170,14 @@ typedef struct _U64_S
 #  define XXH_swap32 __builtin_bswap32
 #  define XXH_swap64 __builtin_bswap64
 #else
-static inline U32 XXH_swap32 (U32 x)
+static U32 XXH_swap32 (U32 x)
 {
     return  ((x << 24) & 0xff000000 ) |
             ((x <<  8) & 0x00ff0000 ) |
             ((x >>  8) & 0x0000ff00 ) |
             ((x >> 24) & 0x000000ff );
 }
-static inline U64 XXH_swap64 (U64 x)
+static U64 XXH_swap64 (U64 x)
 {
     return  ((x << 56) & 0xff00000000000000ULL) |
             ((x << 40) & 0x00ff000000000000ULL) |
@@ -212,7 +211,7 @@ static inline U64 XXH_swap64 (U64 x)
 *  Architecture Macros
 ****************************************/
 typedef enum { XXH_bigEndian=0, XXH_littleEndian=1 } XXH_endianess;
-#ifndef XXH_CPU_LITTLE_ENDIAN   // It is possible to define XXH_CPU_LITTLE_ENDIAN externally, for example using a compiler switch
+#ifndef XXH_CPU_LITTLE_ENDIAN   /* XXH_CPU_LITTLE_ENDIAN can be defined externally, for example using a compiler switch */
 static const int one = 1;
 #   define XXH_CPU_LITTLE_ENDIAN   (*(char*)(&one))
 #endif
@@ -221,7 +220,7 @@ static const int one = 1;
 /**************************************
 *  Macros
 ***************************************/
-#define XXH_STATIC_ASSERT(c)   { enum { XXH_static_assert = 1/(!!(c)) }; }    // use only *after* variable declarations
+#define XXH_STATIC_ASSERT(c)   { enum { XXH_static_assert = 1/(!!(c)) }; }    /* use only *after* variable declarations */
 
 
 /****************************
diff --git a/programs/bench.c b/programs/bench.c
index ba3284e..02e56c9 100644
--- a/programs/bench.c
+++ b/programs/bench.c
@@ -79,7 +79,7 @@ static int LZ4_compress_local(const char* src, char* dst, int size, int clevel)
 /**************************************
 *  Basic Types
 ***************************************/
-#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L   // C99
+#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L   /* C99 */
 # include <stdint.h>
   typedef uint8_t  BYTE;
   typedef uint16_t U16;
@@ -247,7 +247,7 @@ int BMK_benchFile(char** fileNamesTable, int nbFiles, int cLevel)
   double totald = 0.;
 
 
-  // Init
+  /* Init */
   if (cLevel <= 3) cfunctionId = 0; else cfunctionId = 1;
   switch (cfunctionId)
   {
-- 
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