Fix string catenate error.

1 files changed, 7 insertions, 5 deletions

diff --git a/source/fud_string.cpp b/source/fud_string.cpp
index 52d6b8f..97acb52 100644
--- a/source/fud_string.cpp
+++ b/source/fud_string.cpp
@@ -16,6 +16,7 @@
  */
 
 #include "fud_string.hpp"
+
 #include "fud_assert.hpp"
 
 namespace fud {
@@ -115,7 +116,8 @@ String& String::operator=(const String& rhs)
     return *this;
 }
 
-String& String::operator=(String&& rhs) {
+String& String::operator=(String&& rhs)
+{
     m_length = rhs.m_length;
     m_capacity = rhs.m_capacity;
     if (rhs.isLarge()) {
@@ -287,7 +289,7 @@ String String::catenate(const String& rhs) const
     auto* destPtr = output.data();
     auto status = copyMem(destPtr, m_capacity, data(), length());
     fudAssert(status == FudStatus::Success);
-    status = copyMem(destPtr + length(), m_capacity, rhs.data(), rhs.length());
+    status = copyMem(destPtr + length(), output.m_capacity - length(), rhs.data(), rhs.length());
     fudAssert(status == FudStatus::Success);
     static_cast<void>(status);
     fudAssert(output.nullTerminate() == FudStatus::Success);
@@ -295,7 +297,8 @@ String String::catenate(const String& rhs) const
     return output;
 }
 
-bool String::compare(const String& rhs) const {
+bool String::compare(const String& rhs) const
+{
     if (!valid() || !rhs.valid()) {
         return false;
     }
@@ -304,8 +307,7 @@ bool String::compare(const String& rhs) const {
         return false;
     }
 
-    if (isLarge() && data() == rhs.data())
-    {
+    if (isLarge() && data() == rhs.data()) {
         return true;
     }