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Diffstat (limited to 'include/rtl/bootstrap.h')
| -rw-r--r-- | include/rtl/bootstrap.h | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/include/rtl/bootstrap.h b/include/rtl/bootstrap.h new file mode 100644 index 000000000..e532cd0e3 --- /dev/null +++ b/include/rtl/bootstrap.h @@ -0,0 +1,224 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +/* + * This file is part of LibreOffice published API. + */ +#ifndef INCLUDED_RTL_BOOTSTRAP_H +#define INCLUDED_RTL_BOOTSTRAP_H + +#include "sal/config.h" + +#include "rtl/ustring.h" +#include "sal/saldllapi.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + @file + + The described concept provides a platform independent way to access + minimum bootstrap settings for every application by explicitly or + implicitly passing the values to the application. + + <strong>MULTI-LEVEL STRATEGY FOR RETRIEVAL OF BOOTSTRAP VALUES:</strong> + + The 1st level is tried first. On failure, + the next level is tried. Every query starts at the first level again, so + that one setting may be taken from the 3rd and one from the 1st level. + + 1st level: explicitly set variables via rtl_bootstrap_set() + + 2nd level: command line arguments. A `-env:SETTINGNAME=value` is given on + command line. This allows giving an application a certain setting, even + if an ini-file exists (especially useful for e.g. daemons that want to + start an executable with dynamical changing settings). + + 3rd level: environment variables. The application tries to get the + setting from the environment. + + 4th level: executable ini-file. Every application looks for an ini-file. + The filename defaults to `/absolute/path/to/executable[rc|.ini]` + without .bin or .exe suffix. The ini-filename can be + set by the special command line parameter + `-env:INIFILENAME=/absolute/path/to/inifile` at runtime or it may + be set at compile time by an API-call. + + 5th level: URE_BOOTSTRAP ini-file. If the bootstrap variable URE_BOOTSTRAP + expands to the URL of an ini-file, that ini-file is searched. + + 6th level: default. An application can have some default settings decided + at compile time, which allow the application to run even with no + deployment settings. + + If neither of the above levels leads to a successful retrieval of the value + (no default possible), the application may fail to start. + + <strong>NAMING CONVENTIONS</strong> + + Naming conventions for names of bootstrap values: + Names may only include characters, that are allowed characters for + environment variables. This excludes '.', ' ', ';', ':' and any non-ascii + character. Names are case insensitive. + + An ini-file is only allowed to have one section, which must be named + `[Bootstrap]` with the square brackets. + The section may be omitted. + The section name does not appear in the name of the corresponding + environment variable or commandline arg. + Values may be arbitrary unicode strings, they must be encoded in UTF8. + + <em>Example:</em> + + in an ini-file: + <code> + [Sectionname] + Name=value + </code> + + as commandline arg: + <code>-env:Name=value</code> + + as environment: + - <code>setenv Name value</code> + - <code>set Name=value</code> + + <strong>SPECIAL VARIABLES:</strong> + + - INIFILENAME<br> + This variable allows to set the inifilename. This makes only sense, if the filename + is different than the executable file name. It must be given on command line. If it is + given the executable ini-file is ignored. +*/ + +/** may be called by an application to set an ini-filename. + + Must be called before rtl_bootstrap_get(). May not be called twice. + If it is never called, the filename is based on the name of the executable, + with the suffix ".ini" on Windows or "rc" on Unix. + + @param pFileUri URL of the inifile with path but WITHOUT suffix (.ini or rc) +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_setIniFileName( rtl_uString *pFileUri ); + +/** + @param pName + The name of the bootstrap setting to be retrieved. + @param[out] ppValue + Contains always a valid rtl_uString pointer. + @param pDefault + maybe <code>NULL</code>. If once the default is + returned, successive calls always return this + default value, even when called with different + defaults. + + @retval sal_True when a value could be retrieved successfully. + When a <code>pDefault</code> value is given, + the function always returns <code>sal_True</code>. + @retval sal_False when none of the 4 methods gave a value. + <code>ppValue</code> then contains an empty string. +*/ +SAL_DLLPUBLIC sal_Bool SAL_CALL rtl_bootstrap_get( + rtl_uString *pName, rtl_uString **ppValue, rtl_uString *pDefault ); + +/** Sets a bootstrap parameter. + + @param pName + name of bootstrap parameter + @param pValue + value of bootstrap parameter +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_set( + rtl_uString * pName, rtl_uString * pValue ); + + +typedef void * rtlBootstrapHandle; + +/** + Opens a bootstrap argument container. + @param[in] pIniName The name of the ini-file to use, if <code>NULL</code> defaults + to the executables name + @return Handle for a bootstrap argument container +*/ +SAL_DLLPUBLIC rtlBootstrapHandle SAL_CALL rtl_bootstrap_args_open(rtl_uString * pIniName); + +/** + Closes a bootstrap argument container. + @param[in] handle The handle got by rtl_bootstrap_args_open() +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_args_close(rtlBootstrapHandle handle) + SAL_THROW_EXTERN_C(); + +/** + @param[in] handle The handle got by rtl_bootstrap_args_open() + @param[in] pName The name of the variable to be retrieved + @param[out] ppValue The result of the retrieval. *ppValue may be null in case of failure. + @param[in] pDefault The default value for the retrieval, may be <code>NULL</code> + + @return The status of the retrieval, <code>sal_True</code> on success. +*/ +SAL_DLLPUBLIC sal_Bool SAL_CALL rtl_bootstrap_get_from_handle( + rtlBootstrapHandle handle, rtl_uString *pName, rtl_uString **ppValue, rtl_uString *pDefault); + + +/** Returns the name of the inifile associated with this handle. + + @param[in] handle The handle got by rtl_bootstrap_args_open() + @param[out] ppIniName contains after the call the name of the ini-filename. +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_get_iniName_from_handle( + rtlBootstrapHandle handle, rtl_uString ** ppIniName); + +/** Expands a macro using bootstrap variables. + + @param[in] handle The handle got by rtl_bootstrap_args_open() + @param[in,out] macro The macro to be expanded +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_expandMacros_from_handle( + rtlBootstrapHandle handle, rtl_uString ** macro ); + +/** Expands a macro using default bootstrap variables. + + @param[in,out] macro The macro to be expanded +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_expandMacros( + rtl_uString ** macro); + +/** Escapes special characters ("$" and "\"). + + @param value + an arbitrary, non-NULL value + + @param[out] encoded + the given value with all occurrences of special characters ("$" and "\") escaped + + @since UDK 3.2.9 +*/ +SAL_DLLPUBLIC void SAL_CALL rtl_bootstrap_encode( + rtl_uString const * value, rtl_uString ** encoded ); + +#ifdef __cplusplus +} +#endif + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |