new interpreter file, basic interprater state implementaion

byterun/include/parser.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <stdio.h>
+
+/* The unpacked representation of bytecode file */
+typedef struct {
+  char *string_ptr;     /* A pointer to the beginning of the string table */
+  int *public_ptr;      /* A pointer to the beginning of publics table    */
+  char *code_ptr;       /* A pointer to the bytecode itself               */
+  int *global_ptr;      /* A pointer to the global area                   */
+  int stringtab_size;   /* The size (in bytes) of the string table        */
+  int global_area_size; /* The size (in words) of global area             */
+  int public_symbols_number; /* The number of public symbols */
+  char buffer[0];
+} bytefile;
+
+/* Gets a string from a string table by an index */
+char *get_string(bytefile *f, int pos);
+
+/* Gets a name for a public symbol */
+char *get_public_name(bytefile *f, int i);
+
+/* Gets an offset for a publie symbol */
+int get_public_offset(bytefile *f, int i);
+
+bytefile *read_file(char *fname);
+
+void dump_file(FILE *f, bytefile *bf);