1 files changed, 63 insertions, 0 deletions

diff --git a/include/midillo/util.h b/include/midillo/util.h
new file mode 100644
index 0000000..f9c8430
--- a/dev/null
+++ b/include/midillo/util.h
@@ -0,0 +1,63 @@
+#ifndef __MIDILLO_UTIL_H
+#define __MIDILLO_UTIL_H
+
+#include <istream>
+#include <ostream>
+
+/**
+ * @file
+ * @brief utilities
+ */
+
+namespace midillo {
+    using std::istream;
+    using std::ostream;
+
+    /**
+     * read 32 bits word from the stream
+     * @param s input stream
+     * @return the data acquired
+     */
+    unsigned long read32(istream& s);
+    /**
+     * read 16 bits word from the stream
+     * @param s input stream
+     * @return the data acquired
+     */
+    unsigned int read16(istream& s);
+    /**
+     * read the variable length quantity from the stream
+     * @param s input stream
+     * @return the data acquired
+     */
+    unsigned long readVL(istream& s);
+
+    /**
+     * write 32 bits word to the stream
+     * @param s output stream
+     * @param d data to write
+     */
+    void write32(ostream& s,unsigned long d);
+    /**
+     * write 16 bits word to the stream
+     * @param s output stream
+     * @param d data to write
+     */
+    void write16(ostream& s,unsigned int d);
+    /**
+     * write the variable length quantity to the stream
+     * @param s output stream
+     * @param d data to write
+     */
+    void writeVL(ostream& s,unsigned long d);
+
+    /**
+     * calculate the amount of data that would be written by writeVL
+     * @param d data that would be written
+     * @return the number of bytes
+     */
+    unsigned long calcVLsize(unsigned long d);
+
+}
+
+#endif /* __MIDILLO_UTIL_H */