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270 lines
8.1 KiB
C++
270 lines
8.1 KiB
C++
// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
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// Copyright (C) 2010 Winch Gate Property Limited
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as
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// published by the Free Software Foundation, either version 3 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "stdmisc.h"
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#include "nel/misc/xml_pack.h"
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#include "nel/misc/file.h"
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using namespace std;
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namespace NLMISC
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{
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NLMISC_SAFE_SINGLETON_IMPL(CXMLPack);
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// For a simple parser, we read by line, with a limit to 1Ko
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const uint32 MaxLineSize = 1*1024;
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/// Consume space and tab characters (but NOT newlines)
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void CXMLPack::skipWS(string::iterator &it, string::iterator end)
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{
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while (it != end && (*it == ' ' || *it == '\t'))
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++it;
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}
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/// Try to match the specified text at current position. Return false of no match
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bool CXMLPack::matchString(string::iterator &it, string::iterator end, const char *text)
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{
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string::iterator rewind = it;
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// skip leading WS
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skipWS(it, end);
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while (it != end && *text && *text == *it)
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{
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++it;
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++text;
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}
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if (*text == 0)
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{
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// we have advanced up to the end of text, so the match is OK
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return true;
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}
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// no match !
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// rewind
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it = rewind;
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return false;
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}
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/// Advance up to the beginning of the next line, incrementing the in/out param lineCount
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void CXMLPack::skipLine(string::iterator &it, string::iterator end, uint32 &lineCount)
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{
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// advance up to end of string or newline char
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while (it != end && *it != '\n')
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{
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++it;
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}
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// skip the new line char
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if (it != end && *it == '\n')
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{
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++it;
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++lineCount;
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}
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}
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// Add an xml pack to the manager
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bool CXMLPack::add (const std::string &xmlPackFileName)
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{
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// prepare the container to store this pack file
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TStringId packId = CStringMapper::map(xmlPackFileName);
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TPackList::iterator packIt(_XMLPacks.find(packId));
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if (packIt != _XMLPacks.end())
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{
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nlwarning("CXMLPack::add : can't add xml_pack file '%s' because already added", xmlPackFileName.c_str());
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return false;
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}
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TXMLPackInfo &packInfo = _XMLPacks[packId];
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// open the xml pack for later access
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// packInfo.FileHandler = fopen(xmlPackFileName.c_str(), "rb");
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// open the xml pack for parsing
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CIFile packFile;
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packFile.open(xmlPackFileName);
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uint32 packSize = packFile.getFileSize();
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string buffer;
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buffer.resize(packSize);
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// read the file in memory for parsing
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packFile.serialBuffer((uint8*)buffer.data(), packSize);
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string::iterator it=buffer.begin(), end(buffer.end());
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uint32 lineCount = 0;
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// check the xml pack header element
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if (!matchString(it, end, "<nel:packed_xml>"))
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{
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nlwarning("Error : invalid pack file '%s', invalid header", xmlPackFileName.c_str());
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return false;
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}
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// advance to next line
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skipLine(it, end, lineCount);
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// now enter the sub file loop
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for(;;)
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{
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TXMLFileInfo fileInfo;
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// match a sub file header
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if (!matchString(it, end, "<nel:xml_file"))
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{
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nlwarning("Error : invalid pack file content at line %u in '%s'", lineCount, xmlPackFileName.c_str());
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return false;
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}
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// ok, extract the file name from the header, match 'name' then '=' then '"'
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if (!matchString(it, end, "name") || !matchString(it, end, "=") || !matchString(it, end, "\""))
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{
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nlwarning("Error : invalid pack file sub header at line %u in '%s', can't found attribute 'name'", lineCount, xmlPackFileName.c_str());
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return false;
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}
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string::iterator nameBegin = it;
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// advance up to closing quote
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while (it != end && *it != '\"')
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++it;
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if (it == end)
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{
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nlwarning("Error : invalid pack file sub header at line %u in '%s', can't found attribute closing quote for name", lineCount, xmlPackFileName.c_str());
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return false;
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}
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string subFileName(buffer, nameBegin-buffer.begin(), it-nameBegin);
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if (subFileName.empty())
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{
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nlwarning("Error : invalid pack file sub header at line %u in '%s', empty filename", lineCount, xmlPackFileName.c_str());
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return false;
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}
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// advance to the closing '>'
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while (it != end && *it != '>')
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++it;
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if (it == end)
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{
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nlwarning("Error : invalid pack file sub header at line %u in '%s', can't found element closing '>'", lineCount, xmlPackFileName.c_str());
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return false;
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}
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// advance to next line (beginning of sub file)
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skipLine(it, end, lineCount);
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string::iterator beginOfFile = it;
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string::iterator endOfFile = it;
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// now, advance up to the end of file
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while (it != end && !matchString(it, end, "</nel:xml_file>"))
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{
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skipLine(it, end, lineCount);
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endOfFile = it;
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}
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// we must not be at end of file
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if (it == end)
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{
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nlwarning("Error : invalid sub file at line %u in '%s', reach end of file without closing file and pack elements", lineCount, xmlPackFileName.c_str());
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return false;
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}
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// ok, the file is parsed, store it
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fileInfo.FileName = CStringMapper::map(subFileName);
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fileInfo.FileOffset = (uint32)(beginOfFile - buffer.begin());
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fileInfo.FileSize = (uint32)(endOfFile - beginOfFile);
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// fileInfo.FileHandler = fopen(xmlPackFileName.c_str(), "rb");
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packInfo._XMLFiles.insert(make_pair(fileInfo.FileName, fileInfo));
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// advance to next line
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skipLine(it, end, lineCount);
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// check for end of pack
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if (matchString(it, end, "</nel:packed_xml>"))
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{
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// ok, the parse is over
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break;
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}
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// continue to next file in pack
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}
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nldebug("XMLPack : xml_pack '%s' added to the collection with %u files", xmlPackFileName.c_str(), packInfo._XMLFiles.size());
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// ok, parsing ended
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return true;
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}
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// List all files in an xml_pack file
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void CXMLPack::list (const std::string &xmlPackFileName, std::vector<std::string> &allFiles)
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{
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TStringId key = CStringMapper::map(xmlPackFileName);
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TPackList::const_iterator it(_XMLPacks.find(key));
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if (it != _XMLPacks.end())
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{
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const TXMLPackInfo &packInfo = it->second;
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// we found it, fill the out vector
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TXMLPackInfo::TFileList::const_iterator first(packInfo._XMLFiles.begin()), last(packInfo._XMLFiles.end());
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for (; first != last; ++first)
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{
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const TXMLFileInfo &fileInfo = first->second;
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allFiles.push_back(CStringMapper::unmap(fileInfo.FileName));
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}
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}
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}
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// Used by CIFile to get information about the files within the xml pack
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FILE* CXMLPack::getFile (const std::string &sFileName, uint32 &rFileSize, uint32 &rFileOffset,
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bool &rCacheFileOnOpen, bool &rAlwaysOpened)
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{
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// split the name appart from the '@@' separator to get the pack file name
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// and subfile name
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vector<string> parts;
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explode(sFileName, string("@@"), parts, true);
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if (parts.size() != 2)
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{
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nlwarning("CXMLPack::getFile : Can't extract pack and filename from '%s', found %u part instead of 2 when spliting apart from '@@'",
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sFileName.c_str(),
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parts.size());
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return NULL;
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}
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TStringId packId = CStringMapper::map(parts[0]);
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TStringId fileId = CStringMapper::map(parts[1]);
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TPackList::iterator packIt(_XMLPacks.find(packId));
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if (packIt == _XMLPacks.end())
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{
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nlwarning("CXMLPack::getFile : Can't find xml pack file named '%s' to open '%s'", parts[0].c_str(), sFileName.c_str());
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return NULL;
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}
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TXMLPackInfo &packInfo = packIt->second;
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TXMLPackInfo::TFileList::iterator fileIt = packInfo._XMLFiles.find(fileId);
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if (fileIt == packInfo._XMLFiles.end())
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{
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nlwarning("CXMLPack::getFile : Can't find xml file named '%s' in pack '%s'",
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parts[1].c_str(), parts[0].c_str());
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return NULL;
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}
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// ok, we have found it !
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TXMLFileInfo &fileInfo = fileIt->second;
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// fill the return value
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rFileSize = fileInfo.FileSize;
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rFileOffset = fileInfo.FileOffset;
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rCacheFileOnOpen = false;
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rAlwaysOpened = false;
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FILE *fp = fopen(parts[0].c_str(), "rb");
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return fp;
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}
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} // namespace NLMISC
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