Add function to get extension of a filename

include/blc_tools.h

@@ -252,7 +252,9 @@ char rand_char();
 ///Close both part (input/output) of  a pipe
 void blc_close_pipe(int *pipe);
 
-//int set_iovec(struct iovec *iovec, void *data, size_t size, ...);
+///Get the extension (text after last '.') in the filename
+char const *blc_get_filename_extension(char const *filename);
+
 END_EXTERN_C
 ///@}
 #endif /* BLC_TOOLS_H */

src/blc_tools.cpp

@@ -256,6 +256,20 @@ void blc_close_pipe(int *pipe)
  
  */
 
+char const *blc_get_filename_extension(char const *filename){
+    char const *ext=NULL, *next_ext;
+    
+    
+    next_ext=strchr(filename, '.');
+    if (next_ext==NULL) return NULL;
+
+    do{
+        ext=next_ext;
+        next_ext=strchr(ext+1, '.');
+    }while(next_ext);
+    
+    return ext+1;
+}