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Diffstat (limited to 'sal/rtl/bootstrap.cxx')
| -rw-r--r-- | sal/rtl/bootstrap.cxx | 992 |
1 files changed, 992 insertions, 0 deletions
diff --git a/sal/rtl/bootstrap.cxx b/sal/rtl/bootstrap.cxx new file mode 100644 index 000000000..12558d319 --- /dev/null +++ b/sal/rtl/bootstrap.cxx @@ -0,0 +1,992 @@ +/* -*- 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 . + */ +#include <config_features.h> +#include <config_folders.h> + +#include <rtl/bootstrap.h> +#include <rtl/bootstrap.hxx> +#include <osl/diagnose.h> +#include <osl/module.h> +#include <osl/process.h> +#include <osl/file.hxx> +#include <osl/mutex.hxx> +#include <osl/profile.hxx> +#include <osl/security.hxx> +#include <rtl/alloc.h> +#include <rtl/string.hxx> +#include <rtl/ustrbuf.hxx> +#include <rtl/ustring.hxx> +#include <rtl/byteseq.hxx> +#include <rtl/malformeduriexception.hxx> +#include <rtl/uri.hxx> +#include <sal/log.hxx> +#include <o3tl/lru_map.hxx> +#include <o3tl/string_view.hxx> + +#include <utility> +#include <vector> +#include <algorithm> +#include <cstddef> +#include <string_view> +#include <unordered_map> + +#ifdef ANDROID +#include <osl/detail/android-bootstrap.h> +#endif + +#ifdef IOS +#include <premac.h> +#import <Foundation/Foundation.h> +#include <postmac.h> +#endif + +using osl::DirectoryItem; +using osl::FileStatus; + +namespace +{ + +struct Bootstrap_Impl; + +constexpr std::u16string_view VND_SUN_STAR_PATHNAME = u"vnd.sun.star.pathname:"; + +bool isPathnameUrl(std::u16string_view url) +{ + return o3tl::matchIgnoreAsciiCase(url, VND_SUN_STAR_PATHNAME); +} + +bool resolvePathnameUrl(OUString * url) +{ + OSL_ASSERT(url); + if (!isPathnameUrl(*url) || + (osl::FileBase::getFileURLFromSystemPath( + url->copy(VND_SUN_STAR_PATHNAME.size()), *url) == + osl::FileBase::E_None)) + { + return true; + } + *url = OUString(); + return false; +} + +enum LookupMode { + LOOKUP_MODE_NORMAL, LOOKUP_MODE_URE_BOOTSTRAP, + LOOKUP_MODE_URE_BOOTSTRAP_EXPANSION }; + +struct ExpandRequestLink { + ExpandRequestLink const * next; + Bootstrap_Impl const * file; + OUString key; +}; + +OUString expandMacros( + Bootstrap_Impl const * file, std::u16string_view text, LookupMode mode, + ExpandRequestLink const * requestStack); + +OUString recursivelyExpandMacros( + Bootstrap_Impl const * file, std::u16string_view text, LookupMode mode, + Bootstrap_Impl const * requestFile, OUString const & requestKey, + ExpandRequestLink const * requestStack) +{ + for (; requestStack; requestStack = requestStack->next) { + if (requestStack->file == requestFile && + requestStack->key == requestKey) + { + return "***RECURSION DETECTED***"; + } + } + ExpandRequestLink link = { requestStack, requestFile, requestKey }; + return expandMacros(file, text, mode, &link); +} + +struct rtl_bootstrap_NameValue +{ + OUString sName; + OUString sValue; + + rtl_bootstrap_NameValue() + {} + rtl_bootstrap_NameValue(OUString name, OUString value ) + : sName(std::move( name )), + sValue(std::move( value )) + {} +}; + +} // end namespace + +typedef std::vector<rtl_bootstrap_NameValue> NameValueVector; + +static bool find( + NameValueVector const & vector, OUString const & key, + OUString * value) +{ + OSL_ASSERT(value); + auto i = std::find_if(vector.begin(), vector.end(), + [&key](const rtl_bootstrap_NameValue& rNameValue) { return rNameValue.sName == key; }); + if (i != vector.end()) + { + *value = i->sValue; + return true; + } + return false; +} + +namespace +{ + NameValueVector rtl_bootstrap_set_vector; +} + +static bool getFromCommandLineArgs( + OUString const & key, OUString * value ) +{ + OSL_ASSERT(value); + + static NameValueVector nameValueVector = []() + { + NameValueVector tmp; + + sal_Int32 nArgCount = osl_getCommandArgCount(); + for(sal_Int32 i = 0; i < nArgCount; ++ i) + { + OUString pArg; + osl_getCommandArg( i, &pArg.pData ); + if( (pArg.startsWith("-") || pArg.startsWith("/") ) && + pArg.match("env:", 1) ) + { + sal_Int32 nIndex = pArg.indexOf( '=' ); + + if( nIndex >= 0 ) + { + rtl_bootstrap_NameValue nameValue; + nameValue.sName = pArg.copy( 5, nIndex - 5 ); + nameValue.sValue = pArg.copy( nIndex+1 ); + + if( i == nArgCount-1 && + nameValue.sValue.getLength() && + nameValue.sValue[nameValue.sValue.getLength()-1] == 13 ) + { + // avoid the 13 linefeed for the last argument, + // when the executable is started from a script, + // that was edited on windows + nameValue.sValue = nameValue.sValue.copy(0,nameValue.sValue.getLength()-1); + } + + tmp.push_back( nameValue ); + } + } + }; + return tmp; + }(); + + return find(nameValueVector, key, value); +} + +static void getExecutableDirectory_Impl(rtl_uString ** ppDirURL) +{ + OUString fileName; + osl_getExecutableFile(&(fileName.pData)); + + sal_Int32 nDirEnd = fileName.lastIndexOf('/'); + OSL_ENSURE(nDirEnd >= 0, "Cannot locate executable directory"); + + rtl_uString_newFromStr_WithLength(ppDirURL,fileName.getStr(),nDirEnd); +} + +static OUString & getIniFileName_Impl() +{ + static OUString aStaticName = []() { + OUString fileName; + +#if defined IOS + // On iOS hardcode the inifile as "rc" in the .app + // directory. Apps are self-contained anyway, there is no + // possibility to have several "applications" in the same + // installation location with different inifiles. + const char *inifile = [[@"vnd.sun.star.pathname:" stringByAppendingString: [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent: @"rc"]] UTF8String]; + fileName = OUString(inifile, strlen(inifile), RTL_TEXTENCODING_UTF8); + resolvePathnameUrl(&fileName); +#elif defined ANDROID + // Apps are self-contained on Android, too, can as well hardcode + // it as "rc" in the "/assets" directory, i.e. inside the app's + // .apk (zip) archive as the /assets/rc file. + fileName = OUString("vnd.sun.star.pathname:/assets/rc"); + resolvePathnameUrl(&fileName); +#elif defined(EMSCRIPTEN) + fileName = OUString("vnd.sun.star.pathname:/instdir/program/sofficerc"); + resolvePathnameUrl(&fileName); +#else + if (getFromCommandLineArgs("INIFILENAME", &fileName)) + { + resolvePathnameUrl(&fileName); + } + else + { + osl_getExecutableFile(&(fileName.pData)); + + // get rid of a potential executable extension + OUString progExt = ".bin"; + if (fileName.getLength() > progExt.getLength() + && o3tl::equalsIgnoreAsciiCase(fileName.subView(fileName.getLength() - progExt.getLength()), progExt)) + { + fileName = fileName.copy(0, fileName.getLength() - progExt.getLength()); + } + + progExt = ".exe"; + if (fileName.getLength() > progExt.getLength() + && o3tl::equalsIgnoreAsciiCase(fileName.subView(fileName.getLength() - progExt.getLength()), progExt)) + { + fileName = fileName.copy(0, fileName.getLength() - progExt.getLength()); + } + + // append config file suffix + fileName += SAL_CONFIGFILE(""); + +#ifdef MACOSX + // We keep only executables in the MacOS folder, and all + // rc files in LIBO_ETC_FOLDER (typically "Resources"). + sal_Int32 off = fileName.lastIndexOf( "/MacOS/" ); + if (off != -1) + fileName = fileName.replaceAt(off + 1, strlen("MacOS"), u"" LIBO_ETC_FOLDER); +#endif + } +#endif + + return fileName; + }(); + + return aStaticName; +} + +// ensure the given file url has no final slash + +static void EnsureNoFinalSlash (OUString & url) +{ + sal_Int32 i = url.getLength(); + + if (i > 0 && url[i - 1] == '/') + url = url.copy(0, i - 1); +} + +namespace { + +struct Bootstrap_Impl +{ + sal_Int32 _nRefCount; + Bootstrap_Impl * _base_ini; + + NameValueVector _nameValueVector; + OUString _iniName; + + explicit Bootstrap_Impl (OUString const & rIniName); + ~Bootstrap_Impl(); + + static void * operator new (std::size_t n) + { return malloc (sal_uInt32(n)); } + static void operator delete (void * p , std::size_t) + { free (p); } + + bool getValue( + OUString const & key, rtl_uString ** value, + rtl_uString * defaultValue, LookupMode mode, bool override, + ExpandRequestLink const * requestStack) const; + bool getDirectValue( + OUString const & key, rtl_uString ** value, LookupMode mode, + ExpandRequestLink const * requestStack) const; + bool getAmbienceValue( + OUString const & key, rtl_uString ** value, LookupMode mode, + ExpandRequestLink const * requestStack) const; + void expandValue( + rtl_uString ** value, OUString const & text, LookupMode mode, + Bootstrap_Impl const * requestFile, OUString const & requestKey, + ExpandRequestLink const * requestStack) const; +}; + +} + +Bootstrap_Impl::Bootstrap_Impl( OUString const & rIniName ) + : _nRefCount( 0 ), + _base_ini( nullptr ), + _iniName (rIniName) +{ + OUString base_ini(getIniFileName_Impl()); + // normalize path + FileStatus status( osl_FileStatus_Mask_FileURL ); + DirectoryItem dirItem; + if (DirectoryItem::get(base_ini, dirItem) == DirectoryItem::E_None && + dirItem.getFileStatus(status) == DirectoryItem::E_None) + { + base_ini = status.getFileURL(); + if (rIniName != base_ini) + { + _base_ini = static_cast< Bootstrap_Impl * >( + rtl_bootstrap_args_open(base_ini.pData)); + } + } + SAL_INFO("sal.bootstrap", "Bootstrap_Impl(): sFile=" << _iniName); + oslFileHandle handle; + if (!_iniName.isEmpty() && + osl_openFile(_iniName.pData, &handle, osl_File_OpenFlag_Read) == osl_File_E_None) + { + rtl::ByteSequence seq; + + while (osl_readLine(handle , reinterpret_cast<sal_Sequence **>(&seq)) == osl_File_E_None) + { + OString line(reinterpret_cast<const char *>(seq.getConstArray()), seq.getLength()); + sal_Int32 nIndex = line.indexOf('='); + if (nIndex >= 1) + { + struct rtl_bootstrap_NameValue nameValue; + nameValue.sName = OStringToOUString(o3tl::trim(line.subView(0,nIndex)), RTL_TEXTENCODING_ASCII_US); + nameValue.sValue = OStringToOUString(o3tl::trim(line.subView(nIndex+1)), RTL_TEXTENCODING_UTF8); + + SAL_INFO("sal.bootstrap", "pushing: name=" << nameValue.sName << " value=" << nameValue.sValue); + + _nameValueVector.push_back(nameValue); + } + } + osl_closeFile(handle); + } + else + { + SAL_INFO( "sal.bootstrap", "couldn't open file: " << _iniName ); + } +} + +Bootstrap_Impl::~Bootstrap_Impl() +{ + if (_base_ini) + rtl_bootstrap_args_close( _base_ini ); +} + +namespace { + +Bootstrap_Impl * get_static_bootstrap_handle() +{ + static Bootstrap_Impl* s_handle = []() { + OUString iniName(getIniFileName_Impl()); + Bootstrap_Impl* that = static_cast<Bootstrap_Impl*>(rtl_bootstrap_args_open(iniName.pData)); + if (!that) + { + that = new Bootstrap_Impl(iniName); + ++that->_nRefCount; + } + return that; + }(); + + return s_handle; +} + +struct FundamentalIniData +{ + rtlBootstrapHandle ini; + + FundamentalIniData() + { + OUString uri; + ini = + (get_static_bootstrap_handle()->getValue( + "URE_BOOTSTRAP", &uri.pData, nullptr, LOOKUP_MODE_NORMAL, false, + nullptr) + && resolvePathnameUrl(&uri)) + ? rtl_bootstrap_args_open(uri.pData) : nullptr; + } + + ~FundamentalIniData() { rtl_bootstrap_args_close(ini); } + + FundamentalIniData(const FundamentalIniData&) = delete; + FundamentalIniData& operator=(const FundamentalIniData&) = delete; +}; + +FundamentalIniData& FundamentalIni() +{ + static FundamentalIniData SINGLETON; + return SINGLETON; +} + +} + +bool Bootstrap_Impl::getValue( + OUString const & key, rtl_uString ** value, rtl_uString * defaultValue, + LookupMode mode, bool override, ExpandRequestLink const * requestStack) + const +{ + if (mode == LOOKUP_MODE_NORMAL && key == "URE_BOOTSTRAP") + mode = LOOKUP_MODE_URE_BOOTSTRAP; + + if (override && getDirectValue(key, value, mode, requestStack)) + return true; + + if (key == "_OS") + { + rtl_uString_assign( + value, OUString(RTL_OS).pData); + return true; + } + + if (key == "_ARCH") + { + rtl_uString_assign( + value, OUString(RTL_ARCH).pData); + return true; + } + + if (key == "_CPPU_ENV") + { + rtl_uString_assign( + value, + (OUString( + SAL_STRINGIFY(CPPU_ENV)). + pData)); + return true; + } + +#ifdef ANDROID + if (key == "APP_DATA_DIR") + { + const char *app_data_dir = lo_get_app_data_dir(); + rtl_uString_assign( + value, OUString(app_data_dir, strlen(app_data_dir), RTL_TEXTENCODING_UTF8).pData); + return true; + } +#endif + +#ifdef IOS + if (key == "APP_DATA_DIR") + { + const char *app_data_dir = [[[[NSBundle mainBundle] bundlePath] stringByAddingPercentEncodingWithAllowedCharacters: [NSCharacterSet URLPathAllowedCharacterSet]] UTF8String]; + rtl_uString_assign( + value, OUString(app_data_dir, strlen(app_data_dir), RTL_TEXTENCODING_UTF8).pData); + return true; + } +#endif + + if (key == "ORIGIN") + { + rtl_uString_assign( + value, + _iniName.copy( + 0, std::max<sal_Int32>(0, _iniName.lastIndexOf('/'))).pData); + return true; + } + + if (getAmbienceValue(key, value, mode, requestStack)) + return true; + + if (key == "SYSUSERCONFIG") + { + OUString v; + bool b = osl::Security().getConfigDir(v); + EnsureNoFinalSlash(v); + rtl_uString_assign(value, v.pData); + return b; + } + + if (key == "SYSUSERHOME") + { + OUString v; + bool b = osl::Security().getHomeDir(v); + EnsureNoFinalSlash(v); + rtl_uString_assign(value, v.pData); + return b; + } + + if (key == "SYSBINDIR") + { + getExecutableDirectory_Impl(value); + return true; + } + + if (_base_ini != nullptr && _base_ini->getDirectValue(key, value, mode, requestStack)) + return true; + + if (!override && getDirectValue(key, value, mode, requestStack)) + return true; + + if (mode == LOOKUP_MODE_NORMAL) + { + FundamentalIniData const & d = FundamentalIni(); + Bootstrap_Impl const * b = static_cast<Bootstrap_Impl const *>(d.ini); + if (b != nullptr && b != this && b->getDirectValue(key, value, mode, requestStack)) + return true; + } + + if (defaultValue != nullptr) + { + rtl_uString_assign(value, defaultValue); + return true; + } + + rtl_uString_new(value); + return false; +} + +bool Bootstrap_Impl::getDirectValue( + OUString const & key, rtl_uString ** value, LookupMode mode, + ExpandRequestLink const * requestStack) const +{ + OUString v; + if (find(_nameValueVector, key, &v)) + { + expandValue(value, v, mode, this, key, requestStack); + return true; + } + + return false; +} + +bool Bootstrap_Impl::getAmbienceValue( + OUString const & key, rtl_uString ** value, LookupMode mode, + ExpandRequestLink const * requestStack) const +{ + OUString v; + bool f; + + { + osl::MutexGuard g(osl::Mutex::getGlobalMutex()); + f = find(rtl_bootstrap_set_vector, key, &v); + } + + if (f || getFromCommandLineArgs(key, &v) || + osl_getEnvironment(key.pData, &v.pData) == osl_Process_E_None) + { + expandValue(value, v, mode, nullptr, key, requestStack); + return true; + } + + return false; +} + +void Bootstrap_Impl::expandValue( + rtl_uString ** value, OUString const & text, LookupMode mode, + Bootstrap_Impl const * requestFile, OUString const & requestKey, + ExpandRequestLink const * requestStack) const +{ + rtl_uString_assign( + value, + (mode == LOOKUP_MODE_URE_BOOTSTRAP && isPathnameUrl(text) ? + text : + recursivelyExpandMacros( + this, text, + (mode == LOOKUP_MODE_URE_BOOTSTRAP ? + LOOKUP_MODE_URE_BOOTSTRAP_EXPANSION : mode), + requestFile, requestKey, requestStack)).pData); +} + +namespace { + +typedef std::unordered_map< OUString, Bootstrap_Impl * > bootstrap_map_t; +bootstrap_map_t bootstrap_map; + +} + +rtlBootstrapHandle SAL_CALL rtl_bootstrap_args_open(rtl_uString * pIniName) +{ + static o3tl::lru_map<OUString,OUString> fileUrlLookupCache(16); + + OUString originalIniName( pIniName ); + OUString iniName; + + osl::ResettableMutexGuard guard(osl::Mutex::getGlobalMutex()); + auto cacheIt = fileUrlLookupCache.find(originalIniName); + bool foundInCache = cacheIt != fileUrlLookupCache.end(); + if (foundInCache) + iniName = cacheIt->second; + guard.clear(); + + // normalize path + if (!foundInCache) + { + FileStatus status(osl_FileStatus_Mask_FileURL); + DirectoryItem dirItem; + if (DirectoryItem::get(originalIniName, dirItem) != DirectoryItem::E_None || + dirItem.getFileStatus(status) != DirectoryItem::E_None) + { + return nullptr; + } + iniName = status.getFileURL(); + } + + guard.reset(); + if (!foundInCache) + fileUrlLookupCache.insert({originalIniName, iniName}); + Bootstrap_Impl * that; + auto iFind(bootstrap_map.find(iniName)); + if (iFind == bootstrap_map.end()) + { + guard.clear(); + that = new Bootstrap_Impl(iniName); + guard.reset(); + iFind = bootstrap_map.find(iniName); + if (iFind == bootstrap_map.end()) + { + ++that->_nRefCount; + ::std::pair< bootstrap_map_t::iterator, bool > insertion( + bootstrap_map.emplace(iniName, that)); + OSL_ASSERT(insertion.second); + } + else + { + Bootstrap_Impl * obsolete = that; + that = iFind->second; + ++that->_nRefCount; + guard.clear(); + delete obsolete; + } + } + else + { + that = iFind->second; + ++that->_nRefCount; + } + return static_cast< rtlBootstrapHandle >( that ); +} + +void SAL_CALL rtl_bootstrap_args_close(rtlBootstrapHandle handle) SAL_THROW_EXTERN_C() +{ + if (!handle) + return; + + Bootstrap_Impl * that = static_cast< Bootstrap_Impl * >( handle ); + + osl::MutexGuard guard(osl::Mutex::getGlobalMutex()); + OSL_ASSERT(bootstrap_map.find(that->_iniName)->second == that); + --that->_nRefCount; + + if (that->_nRefCount != 0) + return; + + std::size_t const nLeaking = 8; // only hold up to 8 files statically + if (bootstrap_map.size() > nLeaking) + { + ::std::size_t erased = bootstrap_map.erase( that->_iniName ); + if (erased != 1) { + OSL_ASSERT( false ); + } + delete that; + } +} + +sal_Bool SAL_CALL rtl_bootstrap_get_from_handle( + rtlBootstrapHandle handle, + rtl_uString * pName, + rtl_uString ** ppValue, + rtl_uString * pDefault +) +{ + osl::MutexGuard guard(osl::Mutex::getGlobalMutex()); + + bool found = false; + if(ppValue && pName) + { + if (!handle) + handle = get_static_bootstrap_handle(); + + found = static_cast< Bootstrap_Impl * >(handle)->getValue( + pName, ppValue, pDefault, LOOKUP_MODE_NORMAL, false, nullptr ); + } + + return found; +} + +void SAL_CALL rtl_bootstrap_get_iniName_from_handle ( + rtlBootstrapHandle handle, + rtl_uString ** ppIniName +) +{ + if(!ppIniName) + return; + + if(handle) + { + Bootstrap_Impl * pImpl = static_cast<Bootstrap_Impl*>(handle); + rtl_uString_assign(ppIniName, pImpl->_iniName.pData); + } + else + { + const OUString & iniName = getIniFileName_Impl(); + rtl_uString_assign(ppIniName, iniName.pData); + } +} + +void SAL_CALL rtl_bootstrap_setIniFileName ( + rtl_uString * pName +) +{ + osl::MutexGuard guard(osl::Mutex::getGlobalMutex()); + OUString & file = getIniFileName_Impl(); + file = pName; +} + +sal_Bool SAL_CALL rtl_bootstrap_get ( + rtl_uString * pName, + rtl_uString ** ppValue, + rtl_uString * pDefault +) +{ + return rtl_bootstrap_get_from_handle(nullptr, pName, ppValue, pDefault); +} + +void SAL_CALL rtl_bootstrap_set ( + rtl_uString * pName, + rtl_uString * pValue +) +{ + const OUString name(pName); + const OUString value(pValue); + + osl::MutexGuard guard(osl::Mutex::getGlobalMutex()); + + for (auto & item : rtl_bootstrap_set_vector) + { + if (item.sName == name) + { + item.sValue = value; + return; + } + } + + SAL_INFO("sal.bootstrap", "explicitly getting: name=" << name << " value=" <<value); + + rtl_bootstrap_set_vector.emplace_back(name, value); +} + +void SAL_CALL rtl_bootstrap_expandMacros_from_handle( + rtlBootstrapHandle handle, + rtl_uString ** macro) +{ + if (!handle) + handle = get_static_bootstrap_handle(); + + OUString expanded(expandMacros(static_cast< Bootstrap_Impl * >(handle), + OUString::unacquired(macro), + LOOKUP_MODE_NORMAL, nullptr)); + rtl_uString_assign(macro, expanded.pData); +} + +void SAL_CALL rtl_bootstrap_expandMacros(rtl_uString ** macro) +{ + rtl_bootstrap_expandMacros_from_handle(nullptr, macro); +} + +void rtl_bootstrap_encode(rtl_uString const * value, rtl_uString ** encoded) +{ + OSL_ASSERT(value); + OUStringBuffer b(value->length+5); + for (sal_Int32 i = 0; i < value->length; ++i) + { + sal_Unicode c = value->buffer[i]; + if (c == '$' || c == '\\') + b.append('\\'); + + b.append(c); + } + + rtl_uString_assign(encoded, b.makeStringAndClear().pData); +} + +namespace { + +int hex(sal_Unicode c) +{ + return + c >= '0' && c <= '9' ? c - '0' : + c >= 'A' && c <= 'F' ? c - 'A' + 10 : + c >= 'a' && c <= 'f' ? c - 'a' + 10 : -1; +} + +sal_Unicode read(std::u16string_view text, std::size_t * pos, bool * escaped) +{ + OSL_ASSERT(pos && *pos < text.length() && escaped); + sal_Unicode c = text[(*pos)++]; + if (c == '\\') + { + int n1, n2, n3, n4; + if (*pos < text.length() - 4 && text[*pos] == 'u' && + ((n1 = hex(text[*pos + 1])) >= 0) && + ((n2 = hex(text[*pos + 2])) >= 0) && + ((n3 = hex(text[*pos + 3])) >= 0) && + ((n4 = hex(text[*pos + 4])) >= 0)) + { + *pos += 5; + *escaped = true; + return static_cast< sal_Unicode >( + (n1 << 12) | (n2 << 8) | (n3 << 4) | n4); + } + + if (*pos < text.length()) + { + *escaped = true; + return text[(*pos)++]; + } + } + + *escaped = false; + return c; +} + +OUString lookup( + Bootstrap_Impl const * file, LookupMode mode, bool override, + OUString const & key, ExpandRequestLink const * requestStack) +{ + OUString v; + (file == nullptr ? get_static_bootstrap_handle() : file)->getValue( + key, &v.pData, nullptr, mode, override, requestStack); + return v; +} + +OUString expandMacros( + Bootstrap_Impl const * file, std::u16string_view text, LookupMode mode, + ExpandRequestLink const * requestStack) +{ + SAL_INFO("sal.bootstrap", "expandMacros called with: " << OUString(text)); + OUStringBuffer buf(2048); + + for (std::size_t i = 0; i < text.length();) + { + bool escaped; + sal_Unicode c = read(text, &i, &escaped); + if (escaped || c != '$') + { + buf.append(c); + } + else + { + if (i < text.length() && text[i] == '{') + { + ++i; + std::size_t p = i; + sal_Int32 nesting = 0; + OUString seg[3]; + int n = 0; + + while (i < text.length()) + { + std::size_t j = i; + c = read(text, &i, &escaped); + + if (!escaped) + { + switch (c) + { + case '{': + ++nesting; + break; + case '}': + if (nesting == 0) + { + seg[n++] = text.substr(p, j - p); + goto done; + } + else + { + --nesting; + } + break; + case ':': + if (nesting == 0 && n < 2) + { + seg[n++] = text.substr(p, j - p); + p = i; + } + break; + } + } + } + done: + for (int j = 0; j < n; ++j) + { + seg[j] = expandMacros(file, seg[j], mode, requestStack); + } + + if (n == 3 && seg[0] != ".override" && seg[1].isEmpty()) + { + // For backward compatibility, treat ${file::key} the + // same as just ${file:key}: + seg[1] = seg[2]; + n = 2; + } + + if (n == 1) + { + buf.append(lookup(file, mode, false, seg[0], requestStack)); + } + else if (n == 2) + { + rtl::Bootstrap b(seg[0]); + Bootstrap_Impl * f = static_cast< Bootstrap_Impl * >(b.getHandle()); + buf.append(lookup(f, mode, false, seg[1], requestStack)); + } + else if (n == 3 && seg[0] == ".override") + { + rtl::Bootstrap b(seg[1]); + Bootstrap_Impl * f = static_cast< Bootstrap_Impl * >(b.getHandle()); + buf.append(lookup(f, mode, f != nullptr, seg[2], requestStack)); + } + else + { + // Going through osl::Profile, this code erroneously + // does not recursively expand macros in the resulting + // replacement text (and if it did, it would fail to + // detect cycles that pass through here): + buf.append( + OStringToOUString( + osl::Profile(seg[0]).readString( + OUStringToOString( + seg[1], RTL_TEXTENCODING_UTF8), + OUStringToOString( + seg[2], RTL_TEXTENCODING_UTF8), + OString()), + RTL_TEXTENCODING_UTF8)); + } + } + else + { + OUStringBuffer kbuf(sal_Int32(text.length())); + for (; i < text.length();) + { + std::size_t j = i; + c = read(text, &j, &escaped); + if (!escaped && + (c == ' ' || c == '$' || c == '-' || c == '/' || + c == ';' || c == '\\')) + { + break; + } + + kbuf.append(c); + i = j; + } + + buf.append( + lookup( + file, mode, false, kbuf.makeStringAndClear(), + requestStack)); + } + } + } + + OUString result(buf.makeStringAndClear()); + SAL_INFO("sal.bootstrap", "expandMacros result: " << result); + + return result; +} + +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |