Bu::FString now has the functions format, formatAppend, and formatPrepend, all

of which use printf style formatting and accept the same parameters as printf.

2 files changed, 56 insertions, 0 deletions

diff --git a/src/fstring.h b/src/fstring.h
index de34cb0..2a18362 100644
--- a/src/fstring.h
+++ b/src/fstring.h
@@ -681,6 +681,50 @@ namespace Bu
                         appendChunk( pNew );
                 }
 
+                void format( const char *sFrmt, ...)
+                {
+                        clear();
+
+                        va_list ap;
+                        va_start( ap, sFrmt );
+
+                        long iLen = vsnprintf( NULL, 0, sFrmt, ap );
+                        
+                        Chunk *pNew = newChunk( iLen );
+                        vsnprintf( pNew->pData, iLen+1, sFrmt, ap );
+                        appendChunk( pNew );
+
+                        va_end( ap );
+                }
+
+                void formatAppend( const char *sFrmt, ...)
+                {
+                        va_list ap;
+                        va_start( ap, sFrmt );
+
+                        long iLen = vsnprintf( NULL, 0, sFrmt, ap );
+                        
+                        Chunk *pNew = newChunk( iLen );
+                        vsnprintf( pNew->pData, iLen+1, sFrmt, ap );
+                        appendChunk( pNew );
+
+                        va_end( ap );
+                }
+
+                void formatPrepend( const char *sFrmt, ...)
+                {
+                        va_list ap;
+                        va_start( ap, sFrmt );
+
+                        long iLen = vsnprintf( NULL, 0, sFrmt, ap );
+                        
+                        Chunk *pNew = newChunk( iLen );
+                        vsnprintf( pNew->pData, iLen+1, sFrmt, ap );
+                        prependChunk( pNew );
+
+                        va_end( ap );
+                }
+
                 /**
                  * Function the archiver calls to archive your FString.
                  *@param ar (Archive) The archive which is archiving your FString.
diff --git a/src/tests/fstrformat.cpp b/src/tests/fstrformat.cpp
new file mode 100644
index 0000000..dbf6133
--- /dev/null
+++ b/src/tests/fstrformat.cpp
@@ -0,0 +1,12 @@
+#include "bu/fstring.h"
+#include <stdio.h>
+
+int main()
+{
+        Bu::FString s;
+
+        s.format("%d, %f, \'%s\'", 144, 12.5, "bob" );
+
+        printf("test:  %s\n", s.getStr() );
+}
+