Base64: Pre-allocate strings when encoding/decoding

xbmc · Oct 14, 2012 · 4e02fe9 · 4e02fe9 · garbear · Oct 14, 2012
1 parent a2040c7
commit 4e02fe9
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/xbmc/utils/Base64.cpp b/xbmc/utils/Base64.cpp
@@ -35,6 +35,7 @@ void Base64::Encode(const char* input, unsigned int length, std::string &output)
 
   long l;
   output.clear();
+  output.reserve(((length + 2) / 3) * 4);
 
   for (unsigned int i = 0; i < length; i += 3)
   {
@@ -98,6 +99,8 @@ void Base64::Decode(const char* input, unsigned int length, std::string &output)
     }
   }
 
+  output.reserve(length - ((length + 2) / 4));
+
   for (unsigned int i = 0; i < length; i += 4)
   {
     l = ((((unsigned long) m_characters.find(input[i])) & 0x3F) << 18);