From: uz <uz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Sat, 29 May 2010 21:23:34 +0000 (+0000)
Subject: Check for a size of zero in SB_CopyBuf to make the code somewhat faster.
X-Git-Tag: V2.13.3~754
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=b942fd0b560868957dbee542200c235a737e6b5e;p=cc65

Check for a size of zero in SB_CopyBuf to make the code somewhat faster.


git-svn-id: svn://svn.cc65.org/cc65/trunk@4675 b7a2c559-68d2-44c3-8de9-860c34a00d81
---

diff --git a/src/common/strbuf.c b/src/common/strbuf.c
index 4a489a708..320e91293 100644
--- a/src/common/strbuf.c
+++ b/src/common/strbuf.c
@@ -179,7 +179,7 @@ static void SB_CheapRealloc (StrBuf* B, unsigned NewSize)
 
     /* Allocate a fresh block */
     B->Buf = xmalloc (NewAllocated);
-
+               
     /* Remember the new block size */
     B->Allocated = NewAllocated;
 }
@@ -225,11 +225,13 @@ void SB_Terminate (StrBuf* B)
 
 void SB_CopyBuf (StrBuf* Target, const char* Buf, unsigned Size)
 /* Copy Buf to Target, discarding the old contents of Target */
-{
-    if (Target->Allocated < Size) {
-       	SB_CheapRealloc (Target, Size);
+{    
+    if (Size) {
+        if (Target->Allocated < Size) {
+            SB_CheapRealloc (Target, Size);
+        }
+        memcpy (Target->Buf, Buf, Size);
     }
-    memcpy (Target->Buf, Buf, Size);
     Target->Len = Size;
 }