/** @file * IPRT - I/O Stream. */ /* * Copyright (C) 2006-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE 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. */ #ifndef IPRT_INCLUDED_stream_h #define IPRT_INCLUDED_stream_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include #include RT_C_DECLS_BEGIN /** @defgroup grp_rt_stream RTStrm - File Streams * @ingroup grp_rt * @{ */ /** Pointer to a stream. */ typedef struct RTSTREAM *PRTSTREAM; /** Pointer to the standard input stream. */ extern RTDATADECL(PRTSTREAM) g_pStdIn; /** Pointer to the standard error stream. */ extern RTDATADECL(PRTSTREAM) g_pStdErr; /** Pointer to the standard output stream. */ extern RTDATADECL(PRTSTREAM) g_pStdOut; /** * Opens a file stream. * * @returns iprt status code. * @param pszFilename Path to the file to open. * @param pszMode The open mode. See fopen() standard. * Format: [+][b|t] * @param ppStream Where to store the opened stream. */ RTR3DECL(int) RTStrmOpen(const char *pszFilename, const char *pszMode, PRTSTREAM *ppStream); /** * Opens a file stream. * * @returns iprt status code. * @param pszMode The open mode. See fopen() standard. * Format: [+][b|t] * @param ppStream Where to store the opened stream. * @param pszFilenameFmt Filename path format string. * @param args Arguments to the format string. */ RTR3DECL(int) RTStrmOpenFV(const char *pszMode, PRTSTREAM *ppStream, const char *pszFilenameFmt, va_list args) RT_IPRT_FORMAT_ATTR(3, 0); /** * Opens a file stream. * * @returns iprt status code. * @param pszMode The open mode. See fopen() standard. * Format: [+][b|t] * @param ppStream Where to store the opened stream. * @param pszFilenameFmt Filename path format string. * @param ... Arguments to the format string. */ RTR3DECL(int) RTStrmOpenF(const char *pszMode, PRTSTREAM *ppStream, const char *pszFilenameFmt, ...) RT_IPRT_FORMAT_ATTR(3, 4); /** * Closes the specified stream. * * @returns iprt status code. * @param pStream The stream to close. */ RTR3DECL(int) RTStrmClose(PRTSTREAM pStream); /** * Get the pending error of the stream. * * @returns iprt status code. of the stream. * @param pStream The stream. */ RTR3DECL(int) RTStrmError(PRTSTREAM pStream); /** * Clears stream error condition. * * All stream operations save RTStrmClose and this will fail * while an error is asserted on the stream * * @returns iprt status code. * @param pStream The stream. */ RTR3DECL(int) RTStrmClearError(PRTSTREAM pStream); /** * Changes the stream mode. * * @returns iprt status code. * @param pStream The stream. * @param fBinary The desired binary (@c true) / text mode (@c false). * Pass -1 to leave it unchanged. * @param fCurrentCodeSet Whether converting the stream from UTF-8 to the * current code set is desired (@c true) or not (@c * false). Pass -1 to leave this property unchanged. */ RTR3DECL(int) RTStrmSetMode(PRTSTREAM pStream, int fBinary, int fCurrentCodeSet); /** * Returns the current echo mode. * This works only for standard input streams. * * @returns iprt status code. * @param pStream The stream. * @param pfEchoChars Where to store the flag whether typed characters are echoed. */ RTR3DECL(int) RTStrmInputGetEchoChars(PRTSTREAM pStream, bool *pfEchoChars); /** * Changes the behavior for echoing inpit characters on the command line. * This works only for standard input streams. * * @returns iprt status code. * @param pStream The stream. * @param fEchoChars Flag whether echoing typed characters is wanted. */ RTR3DECL(int) RTStrmInputSetEchoChars(PRTSTREAM pStream, bool fEchoChars); /** * Checks if this is a terminal (TTY) or not. * * @returns true if it is, false if it isn't or the stream isn't valid. * @param pStream The stream. */ RTR3DECL(bool) RTStrmIsTerminal(PRTSTREAM pStream); /** * Gets the width of the terminal the stream is associated with. * * @returns IPRT status code. * @retval VERR_INVALID_FUNCTION if not connected to a terminal. * @param pStream The stream. * @param pcchWidth Where to return the width. This will never be zero * and always be set, even on error. */ RTR3DECL(int) RTStrmQueryTerminalWidth(PRTSTREAM pStream, uint32_t *pcchWidth); /** * Rewinds the stream. * * Stream errors will be reset on success. * * @returns IPRT status code. * * @param pStream The stream. * * @remarks Not all streams are rewindable and that behavior is currently * undefined for those. */ RTR3DECL(int) RTStrmRewind(PRTSTREAM pStream); /** * Reads from a file stream. * * @returns iprt status code. * @param pStream The stream. * @param pvBuf Where to put the read bits. * Must be cbRead bytes or more. * @param cbRead Number of bytes to read. * @param pcbRead Where to store the number of bytes actually read. * If NULL cbRead bytes are read or an error is returned. */ RTR3DECL(int) RTStrmReadEx(PRTSTREAM pStream, void *pvBuf, size_t cbRead, size_t *pcbRead); /** * Writes to a file stream. * * @returns iprt status code. * @param pStream The stream. * @param pvBuf Where to get the bits to write from. * @param cbWrite Number of bytes to write. * @param pcbWritten Where to store the number of bytes actually written. * If NULL cbWrite bytes are written or an error is returned. */ RTR3DECL(int) RTStrmWriteEx(PRTSTREAM pStream, const void *pvBuf, size_t cbWrite, size_t *pcbWritten); /** * Reads from a file stream. * * @returns iprt status code. * @param pStream The stream. * @param pvBuf Where to put the read bits. * Must be cbRead bytes or more. * @param cbRead Number of bytes to read. */ DECLINLINE(int) RTStrmRead(PRTSTREAM pStream, void *pvBuf, size_t cbRead) { return RTStrmReadEx(pStream, pvBuf, cbRead, NULL); } /** * Writes to a file stream. * * @returns iprt status code. * @param pStream The stream. * @param pvBuf Where to get the bits to write from. * @param cbWrite Number of bytes to write. */ DECLINLINE(int) RTStrmWrite(PRTSTREAM pStream, const void *pvBuf, size_t cbWrite) { return RTStrmWriteEx(pStream, pvBuf, cbWrite, NULL); } /** * Reads a character from a file stream. * * @returns The char as an unsigned char cast to int. * @returns -1 on failure. * @param pStream The stream. */ RTR3DECL(int) RTStrmGetCh(PRTSTREAM pStream); /** * Writes a character to a file stream. * * @returns iprt status code. * @param pStream The stream. * @param ch The char to write. */ RTR3DECL(int) RTStrmPutCh(PRTSTREAM pStream, int ch); /** * Writes a string to a file stream. * * @returns iprt status code. * @param pStream The stream. * @param pszString The string to write. * No newlines or anything are appended or prepended. * The terminating '\\0' is not written, of course. */ RTR3DECL(int) RTStrmPutStr(PRTSTREAM pStream, const char *pszString); /** * Reads a line from a file stream. * * A line ends with a '\\n', '\\r\\n', '\\0' or the end of the file. * * @returns iprt status code. * @retval VINF_BUFFER_OVERFLOW if the buffer wasn't big enough to read an * entire line. * @retval VERR_BUFFER_OVERFLOW if a lone '\\r' was encountered at the end of * the buffer and we ended up dropping the following character. * * @param pStream The stream. * @param pszString Where to store the line. * The line will *NOT* contain any '\\n'. * @param cbString The size of the string buffer. */ RTR3DECL(int) RTStrmGetLine(PRTSTREAM pStream, char *pszString, size_t cbString); /** * Flushes a stream. * * @returns iprt status code. * @param pStream The stream to flush. */ RTR3DECL(int) RTStrmFlush(PRTSTREAM pStream); /** * Prints a formatted string to the specified stream. * * @returns Number of bytes printed. * @param pStream The stream to print to. * @param pszFormat Runtime format string. * @param ... Arguments specified by pszFormat. */ RTR3DECL(int) RTStrmPrintf(PRTSTREAM pStream, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(2, 3); /** * Prints a formatted string to the specified stream. * * @returns Number of bytes printed. * @param pStream The stream to print to. * @param pszFormat Runtime format string. * @param args Arguments specified by pszFormat. */ RTR3DECL(int) RTStrmPrintfV(PRTSTREAM pStream, const char *pszFormat, va_list args) RT_IPRT_FORMAT_ATTR(2, 0); /** * Dumper vprintf-like function outputting to a stream. * * @param pvUser The stream to print to. NULL means standard output. * @param pszFormat Runtime format string. * @param va Arguments specified by pszFormat. */ RTR3DECL(void) RTStrmDumpPrintfV(void *pvUser, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(2, 0); /** * Prints a formatted string to the standard output stream (g_pStdOut). * * @returns Number of bytes printed. * @param pszFormat Runtime format string. * @param ... Arguments specified by pszFormat. */ RTR3DECL(int) RTPrintf(const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(1, 2); /** * Prints a formatted string to the standard output stream (g_pStdOut). * * @returns Number of bytes printed. * @param pszFormat Runtime format string. * @param args Arguments specified by pszFormat. */ RTR3DECL(int) RTPrintfV(const char *pszFormat, va_list args) RT_IPRT_FORMAT_ATTR(1, 0); /** @} */ RT_C_DECLS_END #endif /* !IPRT_INCLUDED_stream_h */