From: Yann Collet <cyan@fb.com>
Date: Sat, 22 Dec 2018 17:09:40 +0000 (-0800)
Subject: guard functions using floating point for debug mode only
X-Git-Tag: v1.3.8~6^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9dfb7e4457aa1027ad173246049343d03351b6c;p=thirdparty%2Fzstd.git

guard functions using floating point for debug mode only

they are only used to print debug messages.
Requested in #1386,
---

diff --git a/lib/compress/zstd_compress_internal.h b/lib/compress/zstd_compress_internal.h
index 798dad14f..3d31ed819 100644
--- a/lib/compress/zstd_compress_internal.h
+++ b/lib/compress/zstd_compress_internal.h
@@ -746,6 +746,7 @@ MEM_STATIC U32 ZSTD_window_update(ZSTD_window_t* window,
 
 
 /* debug functions */
+#if (DEBUGLEVEL>=2)
 
 MEM_STATIC double ZSTD_fWeight(U32 rawStat)
 {
@@ -760,6 +761,8 @@ MEM_STATIC double ZSTD_fWeight(U32 rawStat)
     return (double)weight / fp_multiplier;
 }
 
+/* display a table content,
+ * listing each element, its frequency, and its predicted bit cost */
 MEM_STATIC void ZSTD_debugTable(const U32* table, U32 max)
 {
     unsigned u, sum;
@@ -771,6 +774,9 @@ MEM_STATIC void ZSTD_debugTable(const U32* table, U32 max)
     }
 }
 
+#endif
+
+
 #if defined (__cplusplus)
 }
 #endif
diff --git a/lib/compress/zstd_opt.c b/lib/compress/zstd_opt.c
index 98079822f..d7e812a5e 100644
--- a/lib/compress/zstd_opt.c
+++ b/lib/compress/zstd_opt.c
@@ -54,11 +54,15 @@ MEM_STATIC U32 ZSTD_fracWeight(U32 rawStat)
     return weight;
 }
 
-/* debugging function, @return price in bytes */
+#if (DEBUGLEVEL>=2)
+/* debugging function,
+ * @return price in bytes as fractional value
+ * for debug messages only */
 MEM_STATIC double ZSTD_fCost(U32 price)
 {
     return (double)price / (BITCOST_MULTIPLIER*8);
 }
+#endif
 
 static void ZSTD_setBasePrices(optState_t* optPtr, int optLevel)
 {