#ifndef VDL_CONTEXT_H

#define VDL_CONTEXT_H

#include <stdint.h>

#include <stdbool.h>

struct VdlList;

struct VdlFile;

struct VdlContextSymbolRemapEntry

{

  char *src_name;

  char *src_ver_name;

  char *src_ver_filename;

  char *dst_name;

  char *dst_ver_name;

  char *dst_ver_filename;

};

struct VdlContextLibRemapEntry

{

  char *src;

  char *dst;

};

enum VdlEvent {

  VDL_EVENT_MAPPED,

  VDL_EVENT_UNMAPPED,

  VDL_EVENT_CONSTRUCTED,

  VDL_EVENT_DESTROYED

};

struct VdlContextEventCallbackEntry

{

  void (*fn) (void *handle, enum VdlEvent event, void *context);

  void *context;

};

struct VdlContext

{

  // the list of files loaded in this context

  struct VdlList *loaded;

  // the list of files which are part of the global scope of this context

  // this set is necessarily a subset of the set of loaded files

  struct VdlList *global_scope;

  // describe which symbols should be remapped to which 

  // other symbols during symbol resolution

  struct VdlList *symbol_remaps;

  // describe which libraries should be remapped to which 

  // other libraries during loading

  struct VdlList *lib_remaps;

  // report events within this context

  struct VdlList *event_callbacks;

  // These variables are used by all .init functions

  // _some_ libc .init functions make use of these

  // 3 arguments so, even though no one else uses them, 

  // we have to pass them around.

  int argc;

  char **argv;

  char **envp;  

};

struct VdlContext *vdl_context_new (int argc, char **argv, char **envp);

void vdl_context_delete (struct VdlContext *context);

void vdl_context_add_file (struct VdlContext *context,

			   struct VdlFile *file);

void vdl_context_remove_file (struct VdlContext *context,

			      struct VdlFile *file);

void vdl_context_add_lib_remap (struct VdlContext *context, const char *src, const char *dst);

void vdl_context_add_symbol_remap (struct VdlContext *context, 

				   const char *src_name, 

				   const char *src_ver_name, 

				   const char *src_ver_filename, 

				   const char *dst_name,

				   const char *dst_ver_name,

				   const char *dst_ver_filename);

void vdl_context_add_callback (struct VdlContext *context,

			       void (*cb) (void *handle, enum VdlEvent event, void *context),

			       void *cb_context);

void vdl_context_notify (struct VdlContext *context,

			 struct VdlFile *file,

			 enum VdlEvent event);

const char *vdl_context_lib_remap (const struct VdlContext *context, const char *name);

void vdl_context_symbol_remap (const struct VdlContext *context, 

			       const char **name,

			       const char **ver_name,

			       const char **ver_filename);

bool vdl_context_empty (const struct VdlContext *context);

#endif /* VDL_CONTEXT_H */