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/***
*putch.c - contains the _putch() routine for OS/2 Protected Mode
*
* Copyright (c) 1989-1993, Microsoft Corporation. All rights reserved
*
*Purpose:
* The routine "_putch()" writes a single character to the console.
*
* NOTE: In real-mode DOS the character is actually written to standard
* output, and is therefore redirected when standard output is redirected.
* However, in Protected-Mode OS/2 the character is ALWAYS written
* to the console, even when standard output has been redirected.
*
*Revision History:
* 06-08-89 PHG Module created, based on asm version
* 03-13-90 GJF Made calling type _CALLTYPE1, added #include
* <cruntime.h> and fixed copyright. Also, cleaned up
* the formatting a bit.
* 06-05-90 SBM Recoded as pure 32-bit, using new file handle state bits
* 07-24-90 SBM Removed '32' from API names
* 10-01-90 GJF New-style function declarators.
* 12-04-90 SRW Changed to include <oscalls.h> instead of <doscalls.h>
* 12-06-90 SRW Added _CRUISER_ and _WIN32 conditionals.
* 01-16-91 GJF ANSI naming.
* 02-19-91 SRW Adapt to OpenFile/CreateFile changes (_WIN32_)
* 02-25-91 MHL Adapt to ReadFile/WriteFile changes (_WIN32_)
* 07-26-91 GJF Took out init. stuff and cleaned up the error
* handling [_WIN32_].
* 03-20-93 GJF Use WriteConsole instead of WriteFile.
*
*******************************************************************************/
#include <cruntime.h>
#include <oscalls.h>
#include <conio.h>
#include <os2dll.h>
#include <stdio.h>
/*
* declaration for console handle
*/
extern int _confh;
/***
*int _putch(c) - write a character to the console
*
*Purpose:
* Calls DOSWRITE to output the character
* Note: in OS/2 protect mode always writes to console even
* when stdout redirected
*
*Entry:
* c - Character to be output
*
*Exit:
* If an error is returned from DOSWRITE
* Then returns EOF
* Otherwise
* returns character that was output
*
*Exceptions:
*
*******************************************************************************/
#ifdef MTHREAD
/* normal version lock and unlock the console, and then call the _lk version
which directly accesses the console without locking. */
int _CRTAPI1 _putch (
int c
)
{
int ch;
_mlock(_CONIO_LOCK); /* secure the console lock */
ch = _putch_lk(c); /* output the character */
_munlock(_CONIO_LOCK); /* release the console lock */
return ch;
}
#endif /* MTHREAD */
/* define version which accesses the console directly - normal version in
non-MTHREAD situations, special _lk version in MTHREAD */
#ifdef MTHREAD
int _CRTAPI1 _putch_lk (
#else
int _CRTAPI1 _putch (
#endif
int c
)
{
/* can't use ch directly unless sure we have a big-endian machine */
unsigned char ch = (unsigned char)c;
ULONG num_written;
/* write character to console file handle */
#ifdef _CRUISER_
if (DOSWRITE(_confh, &ch, 1L, &num_written)) {
/* OS/2 error, return error indicator */
return EOF;
}
#else /* ndef _CRUISER_ */
#ifdef _WIN32_
if ( (_confh == -1) || !WriteConsole( (HANDLE)_confh,
(LPVOID)&ch,
1,
&num_written,
NULL )
)
/* return error indicator */
return EOF;
#else /* ndef _WIN32_ */
#error ERROR - ONLY CRUISER OR WIN32 TARGET SUPPORTED!
#endif /* _WIN32_ */
#endif /* _CRUISER_ */
return ch;
}
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