--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/project_files/frontlib/buffer.h	Sat Jun 02 14:26:52 2012 +0200
@@ -0,0 +1,58 @@
+#ifndef BUFFER_H_
+#define BUFFER_H_
+
+#include <stdint.h>
+#include <stddef.h>
+
+/**
+ * A simple struct to hold both the pointer to an array and its size,
+ * for e.g. conveniently returning it from a function.
+ *
+ * Convention: Size is zero iff data is a NULL pointer.
+ */
+typedef struct {
+	void *data;
+	size_t size;
+} flib_buffer;
+
+/**
+ * Just like flib_buffer, but the contents are not supposed to be modified.
+ */
+typedef struct {
+	const void *data;
+	size_t size;
+} flib_constbuffer;
+
+/**
+ * Simple variable-capacity data structure (opaque type).
+ */
+struct _flib_vector;
+typedef struct _flib_vector *flib_vector;
+
+/**
+ * Create a new vector. Needs to be destroyed again later with flib_vector_destroy.
+ * May return NULL if memory runs out.
+ */
+flib_vector flib_vector_create();
+
+/**
+ * Free the memory of this vector and set it to NULL.
+ */
+void flib_vector_destroy(flib_vector *vec);
+
+/**
+ * Append the provided data to the end of the vector, enlarging it as required.
+ * Returns the ammount of data appended, which is either len (success) or 0 (out of memory).
+ * The vector remains unchanged if an out of memory situation occurs.
+ */
+int flib_vector_append(flib_vector vec, const void *data, size_t len);
+
+/**
+ * Return a buffer or constbuffer pointing to the current contents of the vector.
+ * These will become invalid if the vector size or capacity is changed.
+ */
+flib_buffer flib_vector_as_buffer(flib_vector vec);
+flib_constbuffer flib_vector_as_constbuffer(flib_vector vec);
+
+
+#endif