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/* $Id: nocrt-streams-win.cpp $ */
/** @file
* IPRT - No-CRT - minimal stream implementation
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/stream.h>
#include <iprt/nt/nt-and-windows.h>
#include <iprt/ctype.h>
#include <iprt/file.h>
#include <iprt/string.h>
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
typedef struct PRINTFBUF
{
HANDLE hNative;
size_t offBuf;
char szBuf[128];
} PRINTFBUF;
struct RTSTREAM
{
int iStream;
HANDLE hNative;
RTFILE hFile;
};
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
#define MAKE_SURE_WE_HAVE_HFILE_RETURN(a_pStream) do { \
if ((a_pStream)->hFile != NIL_RTFILE) \
break; \
int rc = RTFileFromNative(&(a_pStream)->hFile, (uintptr_t)(a_pStream)->hNative); \
AssertRCReturn(rc, rc); \
} while (0)
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
RTSTREAM g_aStdStreams[3] =
{
{ 0, NULL, NIL_RTFILE },
{ 1, NULL, NIL_RTFILE },
{ 2, NULL, NIL_RTFILE },
};
RTSTREAM *g_pStdIn = &g_aStdStreams[0];
RTSTREAM *g_pStdOut = &g_aStdStreams[1];
RTSTREAM *g_pStdErr = &g_aStdStreams[2];
DECLHIDDEN(void) InitStdHandles(PRTL_USER_PROCESS_PARAMETERS pParams)
{
if (pParams)
{
g_pStdIn->hNative = pParams->StandardInput;
g_pStdOut->hNative = pParams->StandardOutput;
g_pStdErr->hNative = pParams->StandardError;
}
}
static void FlushPrintfBuffer(PRINTFBUF *pBuf)
{
if (pBuf->offBuf)
{
DWORD cbWritten = 0;
WriteFile(pBuf->hNative, pBuf->szBuf, (DWORD)pBuf->offBuf, &cbWritten, NULL);
pBuf->offBuf = 0;
pBuf->szBuf[0] = '\0';
}
}
/** @callback_method_impl{FNRTSTROUTPUT} */
static DECLCALLBACK(size_t) MyPrintfOutputter(void *pvArg, const char *pachChars, size_t cbChars)
{
PRINTFBUF *pBuf = (PRINTFBUF *)pvArg;
if (cbChars != 0)
{
size_t offSrc = 0;
while (offSrc < cbChars)
{
size_t cbLeft = sizeof(pBuf->szBuf) - pBuf->offBuf - 1;
if (cbLeft > 0)
{
size_t cbToCopy = RT_MIN(cbChars - offSrc, cbLeft);
memcpy(&pBuf->szBuf[pBuf->offBuf], &pachChars[offSrc], cbToCopy);
pBuf->offBuf += cbToCopy;
pBuf->szBuf[pBuf->offBuf] = '\0';
if (cbLeft > cbToCopy)
break;
offSrc += cbToCopy;
}
FlushPrintfBuffer(pBuf);
}
}
else /* Special zero byte write at the end of the formatting. */
FlushPrintfBuffer(pBuf);
return cbChars;
}
RTR3DECL(int) RTStrmPrintfV(PRTSTREAM pStream, const char *pszFormat, va_list args)
{
PRINTFBUF Buf;
Buf.hNative = pStream->hNative;
Buf.offBuf = 0;
Buf.szBuf[0] = '\0';
return (int)RTStrFormatV(MyPrintfOutputter, &Buf, NULL, NULL, pszFormat, args);
}
RTR3DECL(int) RTStrmPrintf(PRTSTREAM pStream, const char *pszFormat, ...)
{
va_list args;
va_start(args, pszFormat);
int rc = RTStrmPrintfV(pStream, pszFormat, args);
va_end(args);
return rc;
}
RTR3DECL(int) RTPrintfV(const char *pszFormat, va_list va)
{
PRINTFBUF Buf;
Buf.hNative = g_pStdOut->hNative;
Buf.offBuf = 0;
Buf.szBuf[0] = '\0';
return (int)RTStrFormatV(MyPrintfOutputter, &Buf, NULL, NULL, pszFormat, va);
}
RTR3DECL(int) RTPrintf(const char *pszFormat, ...)
{
va_list va;
va_start(va, pszFormat);
int rc = RTPrintfV(pszFormat, va);
va_end(va);
return rc;
}
#ifndef IPRT_MINIMAL_STREAM
# if 0
RTR3DECL(int) RTStrmReadEx(PRTSTREAM pStream, void *pvBuf, size_t cbToRead, size_t *pcbRead)
{
MAKE_SURE_WE_HAVE_HFILE_RETURN(pStream);
return RTFileRead(pStream->hFile, pvBuf, cbToRead, pcbRead);
}
# endif
RTR3DECL(int) RTStrmWriteEx(PRTSTREAM pStream, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten)
{
MAKE_SURE_WE_HAVE_HFILE_RETURN(pStream);
return RTFileWrite(pStream->hFile, pvBuf, cbToWrite, pcbWritten);
}
RTR3DECL(int) RTStrmFlush(PRTSTREAM pStream)
{
MAKE_SURE_WE_HAVE_HFILE_RETURN(pStream);
return RTFileFlush(pStream->hFile);
}
RTR3DECL(int) RTStrmSetMode(PRTSTREAM pStream, int fBinary, int fCurrentCodeSet)
{
AssertReturn(fBinary != (int)false, VERR_NOT_IMPLEMENTED);
AssertReturn(fCurrentCodeSet <= (int)false, VERR_NOT_IMPLEMENTED);
RT_NOREF(pStream);
return VINF_SUCCESS;
}
#endif
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