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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
license		=	bsd



%%	header

/**	@file
	File functions for dkChar characters
	and strings.

	CRT on Windows: Required.
*/

#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif

#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif

#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif

#ifndef STDIO_H_INCLUDED
#include <stdio.h>
#define	STDIO_H_INCLUDED 1
#endif

#if DK4_HAVE_ERRNO_H
#ifndef ERRNO_H_INCLUDED
#include <errno.h>
#define	ERRNO_H_INCLUDED 1
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	On Windows, initialize stdout to write dkChar and write a BOM.
*/
void
dk4fput_initialize_stdout(void);

/**	On Windows, initialize stdout to write dkChar.
*/
void
dk4fput_initialize_stdout_no_bom(void);

/**	On Windows, initialize stderr to write dkChar and write a BOM.
*/
void
dk4fput_initialize_stderr(void);

/**	On Windows, initialize stderr to write dkChar.
*/
void
dk4fput_initialize_stderr_no_bom(void);

/**	On Windows, initialize file to write dkChar and write a BOM.
	@param	fipo	File to set up.
*/
void
dk4fput_initialize_file(FILE *fipo);

/**	On Windows, initialize file to write dkChar.
	@param	fipo	File to set up.
*/
void
dk4fput_initialize_file_no_bom(FILE *fipo);

/**	On Windows, return to the default file encoding for stdout.
*/
void
dk4fput_cleanup_stdout(void);

/**	On Windows, return to the default file encoding for stderr.
*/
void
dk4fput_cleanup_stderr(void);

/**	Write one character to file.
	@param	c	Character to write.
	@param	fipo	File to write to.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.

	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  if writing wide characters is not supported on the system,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if fipo is NULL,
	- DK4_E_WRITE_FAILED<br>
	  with errno value in iDetails1 if the write attempt failed.
*/
int
dk4fputc(dkChar c, FILE *fipo, dk4_er_t *erp);

/**	Write one string to file.
	@param	s	String to write.
	@param	fipo	File to write to.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.

	Error codes:
	- DK4_E_NOT_SUPPORTED<br>
	  if writing wide character strings is not supported on the system,
	- DK4_E_INVALID_ARGUMENTS<br>
	  if fipo is NULL,
	- DK4_E_WRITE_FAILED<br>
	  with errno in iDetails1 if the write attempt failed.
*/
int
dk4fputs(const dkChar *s, FILE *fipo, dk4_er_t *erp);

#ifdef __cplusplus
}
#endif



%%	module

#include "dk4fput.h"

#if DK4_HAVE_IO_H
#ifndef IO_H_INCLUDED
#include <io.h>
#define IO_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_FCNTL_H
#ifndef FCNTL_H_INCLUDED
#include <fcntl.h>
#define	FCNTL_H_INCLUDED 1
#endif
#endif



$!trace-include



#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)

/**	Flag: Standard output initialized to write dkChar.
*/
static int dk4fput_stdout_initialized = 0;

/**	Standard output mode at startup (should be restored before exiting).
*/
static int dk4fput_stdout_oldmode = _O_TEXT;

/**	Flag: Standard error output initialized to write dkChar.
*/
static int dk4fput_stderr_initialized = 0;

/**	Standard error mode at startup (should be restored before exiting).
*/
static int dk4fput_stderr_oldmode = _O_TEXT;

#endif



void
dk4fput_initialize_stdout(void)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (0 == dk4fput_stdout_initialized) {
    dk4fput_stdout_oldmode = _setmode(_fileno(stdout), _O_U16TEXT);
    if (0 == _isatty(_fileno(stdout))) {
      fputwc((wchar_t)0xFEFF, stdout);
    }
    dk4fput_stdout_initialized = 1;
  }
#endif
}



void
dk4fput_initialize_stdout_no_bom(void)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (0 == dk4fput_stdout_initialized) {
    dk4fput_stdout_oldmode = _setmode(_fileno(stdout), _O_U16TEXT);
    dk4fput_stdout_initialized = 1;
  }
#endif
}


void
dk4fput_cleanup_stdout(void)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (0 != dk4fput_stdout_initialized) {
    fflush(stdout);
    (void)_setmode(_fileno(stdout), dk4fput_stdout_oldmode);
  }
#endif
}



void
dk4fput_initialize_stderr(void)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (0 == dk4fput_stderr_initialized) {
    dk4fput_stderr_oldmode = _setmode(_fileno(stderr), _O_U16TEXT);
    if (0 == _isatty(_fileno(stderr))) {
      fputwc((wchar_t)0xFEFF, stderr);
    }
    dk4fput_stderr_initialized = 1;
  }
#endif
}



void
dk4fput_initialize_stderr_no_bom(void)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (0 == dk4fput_stderr_initialized) {
    dk4fput_stderr_oldmode = _setmode(_fileno(stderr), _O_U16TEXT);
    dk4fput_stderr_initialized = 1;
  }
#endif
}



void
dk4fput_cleanup_stderr(void)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (0 != dk4fput_stderr_initialized) {
    fflush(stderr);
    (void)_setmode(_fileno(stdout), dk4fput_stderr_oldmode);
  }
#endif
}


void
dk4fput_initialize_file(FILE *fipo)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (NULL != fipo) {
    (void)_setmode(_fileno(fipo), _O_U16TEXT);
    fputwc(0xFEFF, fipo);
  }
#endif
}



void
dk4fput_initialize_file_no_bom(FILE *fipo)
{
#if DK4_ON_WINDOWS && (DK4_CHAR_SIZE > 1)
  if (NULL != fipo) {
    (void)_setmode(_fileno(fipo), _O_U16TEXT);
  }
#endif
}



int
dk4fputc(dkChar c, FILE *fipo, dk4_er_t *erp)
{
#if DK4_CHAR_SIZE > 1
#if DK4_CHAR_SIZE == DK4_SIZEOF_WCHAR_T
#if DK4_HAVE_FPUTWC
  int	back = 0;
  $? "+ dk4fputc (wide) %lx", (unsigned long)c
  if (NULL != fipo) {
    errno = 0;
    if (WEOF != fputwc(c, fipo)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_WRITE_FAILED, errno);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } $? "- dk4fputc (wide) %d", back
  return back;
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
#else
  int	back = 0;
  if (NULL != fipo) {
    errno = 0;
    if (EOF != fputc(c, fipo)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_WRITE_FAILED, errno);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
#endif
}



int
dk4fputs(const dkChar *s, FILE *fipo, dk4_er_t *erp)
{
#if DK4_CHAR_SIZE > 1
#if DK4_CHAR_SIZE == DK4_SIZEOF_WCHAR_T
#if DK4_HAVE_FPUTWS
  int	back = 0;
  if ((NULL != s) && (NULL != fipo)) {
    errno = 0;
    if (WEOF != fputws(s, fipo)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_WRITE_FAILED, errno);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
#else
  int	back = 0;
  if ((NULL != s) && (NULL != fipo)) {
    errno = 0;
    if (EOF != fputs(s, fipo)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_WRITE_FAILED, errno);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
#endif
}