/*
Copyright (C) 2015-2021, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4wreg8.ctr
*/

#ifndef DK4WREG8_H_INCLUDED
/** Avoid multiple inclusions. */
#define DK4WREG8_H_INCLUDED 1


/**	@file
	Access Windows registry, use
	8 bit character names.

	CRT on Windows: Optional.
*/

#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif

#ifndef DK4TYPES_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include <libdk4base/dk4types.h>
#else
#include <dktools-4/dk4types.h>
#endif
#endif

#ifndef DK4ERROR_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include <libdk4base/dk4error.h>
#else
#include <dktools-4/dk4error.h>
#endif
#endif

#ifndef DK4WREGK_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include <libdk4c/dk4wregk.h>
#else
#include <dktools-4/dk4wregk.h>
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Open a registry key.
	@param	pk	Parent key identifier.
	@param	keyname	Name of registry key to open.
	@param	wr	Flag: Open for write access too.
	@param	erp	Error report, may be NULL.
	@return	Pointer to key handle structure on success, NULL on error.
	
	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  if the function is run on a non-Windows system,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if pk or keyname is invalid,
	- DK4_E_NOT_FOUND<br>
	  if opening or creating the registry key failed,
	- DK4_E_MEMORY_ALLOCATION_FAILED<br>
	  if memory allocation for the key handle structure failed.
*/
void *
dk4wreg_open_key_c8(int pk, const char *keyname, int wr, dk4_er_t *erp);

/**	Set a string value.
	@param	kptr	Key handle structure.
	@param	name	Entry name.
	@param	val	Entry value.
	@param	expand	Flag: Use REG_EXPAND_SZ (1) or REG_SZ (0).
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  when called on non-Windows systems,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if kptr or val is NULL,
	- DK4_E_MATH_OVERFLOW<br>
	  if the name is too long,
	- DK4_E_SYSTEM<br>
	  if RegSetValueExA() failed.
*/
int
dk4wreg_set_string_c8(
  void *kptr, const char *name, const char *val, int expand, dk4_er_t *erp
);

/**	Get string value.
	@param	kptr	Key handle structure.
	@param	name	Entry name.
	@param	bptr	Buffer for result string.
	@param	sz	Result buffer length.
	@param	expand	Pointer to expand flag output variable.
			This variable is set to 1 if the string found
			is of type REG_EXPAND_SZ. The variable is left
			unchanged for REG_SZ.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  when called on non-Windows systems,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if kptr, name, or bptr is NULL or sz is 0,
	- DK4_E_NOT_FOUND<br>
	  if the entry is not found or has 0 length,
	- DK4_E_SYNTAX<br>
	  if the entry is not a string type.
*/
int
dk4wreg_get_string_c8(
  void		*kptr,
  const char	*name,
  char		*bptr,
  size_t	 sz,
  int		*expand,
  dk4_er_t	*erp
);

/**	Set DWORD registry entry.
	@param	kptr	Key handle structure.
	@param	name	Entry name.
	@param	val	Value.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  when called on a non-Windows system,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if kptr is NULL,
	- DK4_E_SYSTEM<br>
	  if RegSetValueExA() failed.
*/
int
dk4wreg_set_dword_c8(
  void *kptr, const char *name, dk4_dword_t val, dk4_er_t *erp
);

/**	Retrieve DWORD value from registry.
	@param	kptr	Key handle structure.
	@param	name	Entry name.
	@param	vptr	Pointer to result variable.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk4wreg_get_dword_c8(
  void		*kptr,
  const char	*name,
  dk4_dword_t	*vptr,
  dk4_er_t	*erp
);

/**	Get string value.
	@param	kptr	Key handle structure.
	@param	name	Entry name.
	@param	dptr	Buffer for result string.
	@param	dsz	Result buffer length.
	@param	b1	First buffer, used for result from RegQueryValue().
			Should have same size as dptr.
	@param	b1sz	Size of b1.
	@param	b2	Second buffer, used for result from ExpandEnvironmentStrings.
			Should be 2 characters larger than dptr.
	@param	b2sz	Size of b2.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  when called on non-Windows systems,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if kptr, name, dptr, b1 or b2 is NULL or
	  dsz, b1sz or b2sz is 0 or out of range,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if one of the buffers is too small,
	- DK4_E_NOT_FOUND<br>
	  if the entry is not found or has 0 length,
	- DK4_E_SYNTAX<br>
	  if the entry is not a string type.
*/
int
dk4wreg_get_expanded_string_c8(
  void		*kptr,
  const char	*name,
  char		*dptr,
  size_t	 dsz,
  char		*b1,
  size_t	 b1sz,
  char		*b2,
  size_t	 b2sz,
  dk4_er_t	*erp
);

#ifdef __cplusplus
}
#endif


#endif