author | hgs |
Mon, 28 Jun 2010 10:34:53 +0530 | |
changeset 8 | 6547bf8ca13a |
parent 0 | 671dee74050a |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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#ifndef CPIXTOOLS_CPIXFSTOOLS_H_ |
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#define CPIXTOOLS_CPIXFSTOOLS_H_ |
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#include <dirent.h> |
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#include <errno.h> |
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#include <stdio.h> |
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#include <string> |
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// A lot of POSIX system calls (open, close, read, write) can fail |
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// with EINTR which means that they just have to be retried. Now, even |
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// if OpenC does not support this, the code here is supposed to be |
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// platform independent and must work on a true *NIX (like linux). |
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#define Cpt_EINTR_RETRY(res,op) while (((res=op) == -1) && (errno == EINTR)) { res ++; /* To avoid compiler warning: FIXME */ } |
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// Same as Cpt_EINTR_RETRY, but for cases when the return value is not |
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// integer, but some pointer, and where failure is signalled through |
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// NULL |
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#define Cpt_EINTR_RETRY_PTR(resPtr,op) while (((resPtr=op) == NULL) && (errno == EINTR)) { ; /* NOP */ } |
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// TODO make this platform independent macro |
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#define Cpt_PATH_SEPARATOR '\\' |
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namespace Cpt |
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{ |
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/** |
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* Gets the parent of a child. |
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* |
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* @param parent the place to copy the parent |
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* @param bufSize the number of bytes available for the parent, |
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* including the terminating zero |
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* @param child the child |
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* |
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* @returns 0 if successful, -1 if not (too small buffer) |
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*/ |
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int getparent(char * parent, |
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size_t bufSize, |
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const char * child); |
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/** |
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* Creates directories, recursively, if necessary. |
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* |
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* @param path the path to the directory to create4 |
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* @param mod the mode of the creation |
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* @returns 0 on success, -1 otherwise |
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*/ |
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int mkdirs(const char* path, int mod); |
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/** |
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* A simple touch utility: if a file at path does not exist, it |
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* will be created with the given mod. |
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* |
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* @param path the path to the file to make sure to exist |
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* @param flags for the file |
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* |
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* @return 0 if successful, -1 otherwise |
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*/ |
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int touch(const char * path, |
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int mod); |
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/** |
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* Checks if a given file (or directory) could be opened for reading. |
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* |
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* @param path the path to the file to test |
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* |
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* @return true if it could be opened for reading |
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*/ |
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bool isreadable(const char * path); |
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/** |
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* Checks if a given path is a valid, regular file. |
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* |
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* @param path the path to check |
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* |
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* @return true if it is a regular file, false otherwise (does not |
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* exist or not a regular file) |
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*/ |
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bool isfile(const char * path); |
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/** |
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* @param path the path to the directory to test |
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* |
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* @returns true if the directory path could be opened as a |
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* directory, false otherwise. |
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*/ |
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bool directoryexists(const char * path); |
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|
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/** |
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* Removes a file or directory (with all its contents |
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* recursively). |
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* |
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* @param path path to remove. If it points to the directory, the |
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* directory itself will be removed too. See removeunder(). |
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* |
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* @returns 0 on success and -1 on error |
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*/ |
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int removeall(const char * path); |
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|
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|
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/** |
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* Removes all the files under a directory. |
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* |
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* @param path the path to the directory under wich everything |
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* must be removed - the directory itself is not removed. If path |
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* happens to point to a file, it will not be removed. See |
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* removeall(). |
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* |
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* @returns 0 on success and -1 on error |
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*/ |
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int removeunder(const char * path); |
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|
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/** |
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* Obtains the size of a file. |
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* |
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* @param path the path to the file |
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* |
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* @returns the size of the file. -1 is returned on error. |
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*/ |
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off_t filesize(const char * path); |
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|
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|
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/** |
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* Obtains the size of a file. |
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* |
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* @param the file descriptor to an open file |
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* |
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* @returns the size of the file. -1 is returned on error. |
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*/ |
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off_t filesize(int fileDesc); |
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|
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|
8 | 163 |
/** |
164 |
* Obtain the size of a directory |
|
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* |
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* @param the path of the directory |
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*/ |
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off_t dirsize(const char * path); |
|
0
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|
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/** |
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* Returns when the file was last modified or 0 if some error occurred. |
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*/ |
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time_t filemodified(const char * path); |
8 | 174 |
|
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/** |
|
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* Adds delimiter if needed |
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*/ |
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std::string appendpath(const char* path, const char* item); |
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0
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|
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/** |
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* Reads line to buffer |
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*/ |
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bool fgetline(FILE* file, std::string& line); |
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|
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enum CopyFileRetCode |
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{ |
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CPT_CPF_OK = 0, |
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CPT_CPF_DST_OPEN_ERROR = -1, |
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CPT_CPF_SRC_OPEN_ERROR = -2, |
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CPT_CPF_DST_WRITE_ERROR = -3, |
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CPT_CPF_SRC_READ_ERROR = -4 |
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}; |
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/** |
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* Copies the content of one file to another file. |
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* |
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* @param dstPath the path to copy to |
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* |
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* @param srcPath the path to copy from |
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* |
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* @return 0 if successful and negative number if failed. For |
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* detailed error codes see enum CopyFileRetCode. |
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*/ |
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int copyFile(const char * dstPath, |
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const char * srcPath); |
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|
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|
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|
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enum CopyRetCode |
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{ |
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CPT_CP_OK = 0, |
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CPT_CP_DST_OPEN_ERROR = -1, |
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CPT_CP_SRC_OPEN_ERROR = -2, |
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CPT_CP_DST_WRITE_ERROR = -3, |
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CPT_CP_SRC_READ_ERROR = -4, |
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CPT_CP_INVALID_ARG_ERROR = -5, |
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CPT_CP_DIR_CREATE_ERROR = -6 |
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}; |
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/** |
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* Recursively copies the content of a file / directory from one |
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* path to another. |
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* |
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* @param dstPath the path to copy to |
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* |
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* @param srcPath the path to copy from |
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* |
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* @param includeSrcDir whether to copy the src directory itself |
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* to dst (inclusive) or only its contents (exclusive), obviously |
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* makes sense only if src is a directory (and not a file). |
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* |
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* @return 0 if successful and negative number if failed. For |
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* detailed error codes see enum CopyRetCode. |
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*/ |
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int copy(const char * dstPath, |
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const char * srcPath, |
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bool includeSrcDir); |
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|
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|
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|
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class IFileVisitor |
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{ |
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public: |
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// |
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// public operators |
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// |
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|
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/** |
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* Called when a file path is encountered during |
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* traversal. Whether that file can be used/opened, is another |
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* question. |
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* |
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* @param path the path to the file |
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* |
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* @returns true if traversal should go on, false otherwise |
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* |
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* NOTE: this method is allowed to throw anything. |
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*/ |
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virtual bool visitFile(const char * path) = 0; |
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|
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|
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/** |
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* An enum type used bye visitDirPre method controlling |
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* whether to continue traversal and how. |
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*/ |
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enum DirVisitResult |
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{ |
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/** |
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* Traversal should continue, that is, it should |
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* descend to the directory that was just pre-visited. |
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*/ |
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IFV_CONTINUE, |
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|
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/** |
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* Traversal should not descend to this directory, but |
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* should continue processing siblings. |
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*/ |
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IFV_SKIPTHISDIR, |
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|
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/** |
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* Traversal should stop alltogether. |
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*/ |
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IFV_STOPTRAVERSAL |
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}; |
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|
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|
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/** |
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* Called when a directory path is encountered during |
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* traversal - before traversing its children (but after the |
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* directory stream has been opened). |
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* |
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* @param path the path to the file |
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* |
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* @returns a value that tells if the traversal should descend |
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* to the directory, or skip it, or stop traversal |
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* alltogether. |
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* |
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* NOTE: this method is allowed to throw anything. |
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*/ |
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virtual DirVisitResult visitDirPre(const char * path) = 0; |
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|
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|
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/** |
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* Called when a directory path is encountered during |
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* traversal - after traversing its children and after the |
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* directory stream has been closed. |
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* |
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* @param path the path to the file |
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* |
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* @returns true if traversal should go on, false otherwise |
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* |
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* NOTE: this method is allowed to throw anything. |
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*/ |
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virtual bool visitDirPost(const char * path) = 0; |
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|
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|
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virtual ~IFileVisitor() = 0; |
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}; |
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|
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|
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/** |
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* Traverses a file system (depth-first descending) from a point. |
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* |
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* @param path the path to start descending from |
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* |
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* @param visitor to visit directories and files. |
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*/ |
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void traverse(const char * path, |
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IFileVisitor * visitor); |
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|
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|
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/** |
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* Appends a path fragment to a path, making sure that there is a |
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* folder separator in between. |
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* |
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* @param path the path to append to - modified |
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* |
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* @param fragment the path part to append, with a folder |
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* separator in between if it is not a suffix of path already. |
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*/ |
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void pathappend(std::string & path, |
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const char * fragment); |
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341 |
|
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|
342 |
|
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343 |
/** |
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344 |
* A sentry class for DIR* types - so you don't have to call |
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|
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* closedir explicitly yourself. |
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*/ |
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|
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class DIRSentry |
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348 |
{ |
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349 |
private: |
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350 |
// |
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351 |
// private members |
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352 |
// |
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353 |
DIR * d_; |
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|
354 |
|
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|
355 |
public: |
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356 |
/** |
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357 |
* Constructs this sentry with the valid DIR* instance |
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parents:
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* obtained through opendir() call. |
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359 |
*/ |
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|
360 |
DIRSentry(DIR * d); |
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|
361 |
|
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|
362 |
|
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363 |
/** |
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364 |
* Destroys this sentry, and along with it the closedir |
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* function is called for the stored DIR* instance. |
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366 |
*/ |
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~DIRSentry(); |
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}; |
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369 |
|
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|
370 |
|
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|
371 |
|
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|
372 |
/** |
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373 |
* Class to guard open file descriptors against not being closed. |
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374 |
*/ |
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class FileDescSentry |
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376 |
{ |
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377 |
private: |
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|
378 |
// |
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379 |
// private members |
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380 |
// |
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int * fileDesc_; |
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|
382 |
|
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|
383 |
|
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|
384 |
public: |
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|
385 |
// |
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|
386 |
// public operators |
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|
387 |
// |
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|
388 |
/** |
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|
389 |
* Constructs this sentry with a pointer to an open file |
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|
390 |
* descriptor. Unless release is called, the destructor of |
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Revision: 201011
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|
391 |
* this instance will (a) close the file descriptor and (b) |
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|
392 |
* set it to -1. |
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|
393 |
* |
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|
394 |
* @param fd the pointer to the open file descriptor. May be |
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|
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* NULL in which case nothing is done. |
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|
396 |
*/ |
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|
397 |
FileDescSentry(int * fd); |
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|
398 |
|
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|
399 |
|
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|
400 |
/** |
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|
401 |
* Releases the file descrpitor guarded by this instance - |
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|
402 |
* when this will be destructed, it will do nothing, once this |
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Revision: 201011
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parents:
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|
403 |
* call has been made. |
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|
404 |
*/ |
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|
405 |
void release(); |
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|
406 |
|
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|
407 |
|
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|
408 |
/** |
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|
409 |
* If this instance still holds a valid pointer to an integer |
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|
410 |
* that is not -1, it will call close on the indicated file |
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Revision: 201011
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parents:
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|
411 |
* descriptor and set the pointed variable to -1. |
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parents:
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|
412 |
*/ |
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parents:
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|
413 |
~FileDescSentry(); |
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|
414 |
}; |
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|
415 |
|
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|
416 |
/** |
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Revision: 201011
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parents:
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|
417 |
* Class to guard open stdio file against not being closed. |
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parents:
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|
418 |
*/ |
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Revision: 201011
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parents:
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|
419 |
class FileSentry |
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|
420 |
{ |
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parents:
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|
421 |
private: |
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parents:
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|
422 |
// |
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parents:
diff
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|
423 |
// private members |
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parents:
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|
424 |
// |
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Revision: 201011
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parents:
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|
425 |
FILE * file_; |
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parents:
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|
426 |
|
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parents:
diff
changeset
|
427 |
|
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parents:
diff
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|
428 |
public: |
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parents:
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|
429 |
// |
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Revision: 201011
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parents:
diff
changeset
|
430 |
// public operators |
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parents:
diff
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|
431 |
// |
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Revision: 201011
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parents:
diff
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|
432 |
|
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parents:
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|
433 |
FileSentry(FILE * file); |
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parents:
diff
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|
434 |
|
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Revision: 201011
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parents:
diff
changeset
|
435 |
|
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Revision: 201011
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parents:
diff
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|
436 |
void release(); |
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parents:
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|
437 |
|
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Revision: 201011
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parents:
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|
438 |
~FileSentry(); |
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parents:
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|
439 |
}; |
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Revision: 201011
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parents:
diff
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|
440 |
|
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Revision: 201011
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parents:
diff
changeset
|
441 |
|
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Revision: 201011
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parents:
diff
changeset
|
442 |
|
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Revision: 201011
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parents:
diff
changeset
|
443 |
|
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Revision: 201011
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parents:
diff
changeset
|
444 |
} |
671dee74050a
Revision: 201011
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parents:
diff
changeset
|
445 |
|
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Revision: 201011
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parents:
diff
changeset
|
446 |
#endif |