started a new database-backed runtime from scratch

src/runtime/c/reader.h

@@ -0,0 +1,43 @@
+#ifndef READER_H_
+#define READER_H_
+
+#include <fstream>
+#include <stdint.h>
+#include "db.h"
+
+// reader for PGF files
+
+class PGF_INTERNAL_DECL PgfReader
+{
+public:
+    PgfReader(std::istream *in);
+
+    uint8_t read_uint8();
+    uint16_t read_u16be();
+    uint64_t read_u64be();
+    double read_double();
+    uint64_t read_uint();
+    int64_t read_int() { return (int64_t) read_uint(); };
+    uint8_t read_tag() { return read_uint8(); }
+    size_t  read_len() { return (size_t) read_uint(); };
+
+    template<class V>
+    ref<V> read_name() { return read_name(offsetof(V,name)); };
+
+    template<class V>
+    Namespace<V> read_namespace(ref<V> (PgfReader::*read_value)());
+
+    PgfLiteral read_literal();
+    ref<PgfFlag> read_flag();
+
+    void read_abstract(PgfAbstr* abstract);
+
+    void read_pgf(PgfPGFRoot* pgf);
+
+private:
+    std::istream *in;
+
+    moffset read_name(size_t size);
+};
+
+#endif