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// Copyright (C) 2009 Benjamin Pollack//// This program is free software: you can redistribute it and/or modify// it under the terms of the GNU General Public License as published by// the Free Software Foundation, either version 2 of the License, or// (at your option) any later version.//// This program is distributed in the hope that it will be useful,// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the// GNU General Public License for more details.//// You should have received a copy of the GNU General Public License// along with this program. If not, see <http://www.gnu.org/licenses/>.#include "stdafx.h"#include "dirstate.h"#include <vector>#include <list>#ifdef WIN32static__int64days_between_epochs=134774;/* days between 1.1.1601 and 1.1.1970 */static__int64secs_between_epochs=(__int64)days_between_epochs*86400;intlstat(constchar*file,struct_stat&rstat){WIN32_FIND_DATAdata;HANDLEhfind;__int64temp;hfind=FindFirstFile(file,&data);if(hfind==INVALID_HANDLE_VALUE)return-1;FindClose(hfind);rstat.st_mtime=*(__int64*)&data.ftLastWriteTime/10000000-secs_between_epochs;rstat.st_size=(data.nFileSizeHigh<<sizeof(data.nFileSizeHigh))|data.nFileSizeLow;return0;}#endif
-#define HASH_LENGTH 20--struct direntry
{
unsigned char state;
unsignedmode;unsignedsize;unsignedmtime;unsignedlength;std::stringname;charstatus(conststruct_stat&stat)const;};chardirentry::status(conststruct_stat&stat)const{switch(this->state){case'n':
if(this->mtime==(unsigned)stat.st_mtime&&this->size==(unsigned)stat.st_size#ifndef WIN32&&this->mode==stat.st_mode#endif)return'C';elsereturn'M';case'm':
return'M';case'r':
return'R';case'a':
return'A';default:return'?';}}
+#define HASH_LENGTH 20++class dirstate
{
typedef std::vector<direntry> EntriesT;
EntriesTentries;public:typedefEntriesT::size_typesize_type;typedefEntriesT::const_iteratorIter;charparent1[HASH_LENGTH];charparent2[HASH_LENGTH];staticstd::auto_ptr<dirstate>read(conststd::string&path);voidadd(constdirentry&e){entries.push_back(e);}Iterbegin()const{returnentries.begin();}Iterend()const{returnentries.end();}size_typesize()const{returnentries.size();}private:staticuint32_tntohl(uint32_tx){return((x&0x000000ffUL)<<24)|((x&0x0000ff00UL)<<8)|((x&0x00ff0000UL)>>8)|((x&0xff000000UL)>>24);}};std::auto_ptr<dirstate>dirstate::read(conststd::string&path){FILE*f=fopen(path.c_str(),"rb");if(!f){TDEBUG_TRACE("dirstate::read: can't open "<<path);returnstd::auto_ptr<dirstate>(0);}std::auto_ptr<dirstate>pd(newdirstate());fread(&pd->parent1,sizeof(char),HASH_LENGTH,f);fread(&pd->parent2,sizeof(char),HASH_LENGTH,f);direntrye;std::vector<char>temp(MAX_PATH+10,0);while(fread(&e.state,sizeof(e.state),1,f)==1){fread(&e.mode,sizeof(e.mode),1,f);fread(&e.size,sizeof(e.size),1,f);fread(&e.mtime,sizeof(e.mtime),1,f);fread(&e.length,sizeof(e.length),1,f);e.mode=ntohl(e.mode);e.size=ntohl(e.size);e.mtime=ntohl(e.mtime);e.length=ntohl(e.length);temp.resize(e.length+1,0);fread(&temp[0],sizeof(char),e.length,f);temp[e.length]=0;e.name=&temp[0];pd->add(e);}fclose(f);returnpd;}classdirstatecache{structentry{constdirstate*dstate;__time64_tmtime;std::stringhgroot;entry():dstate(0),mtime(0){}};typedefstd::list<entry>::iteratorIter;staticstd::list<entry>_cache;public:staticconstdirstate*get(conststd::string&hgroot);};std::list<dirstatecache::entry>dirstatecache::_cache;constdirstate*dirstatecache::get(conststd::string&hgroot){std::stringpath=hgroot;path+="/.hg/dirstate";struct_statstat;if(0!=lstat(path.c_str(),stat)){TDEBUG_TRACE("dirstatecache::get: lstat("<<path<<") fails");return0;}Iteriter=_cache.begin();for(;iter!=_cache.end();++iter){if(hgroot==iter->hgroot)break;}if(iter==_cache.end()){if(_cache.size()>=10){TDEBUG_TRACE("dirstatecache::get: dropping "<<_cache.back().hgroot);delete_cache.back().dstate;_cache.back().dstate=0;_cache.pop_back();}entrye;e.hgroot=hgroot;_cache.push_front(e);iter=_cache.begin();}if(iter->mtime<stat.st_mtime){iter->mtime=stat.st_mtime;if(iter->dstate){deleteiter->dstate;iter->dstate=0;TDEBUG_TRACE("dirstatecache::get: refreshing "<<hgroot);}else{TDEBUG_TRACE("dirstatecache::get: reading "<<hgroot);}iter->dstate=dirstate::read(path).release();TDEBUG_TRACE("dirstatecache::get: "<<iter->dstate->size()<<" entries read. "<<_cache.size()<<" repos in cache");}returniter->dstate;}intHgQueryDirstate(conststd::string&hgroot,conststd::string&abspath,std::string&relpath,constdirstate*&ppd,struct_stat&rstat){if(0!=lstat(abspath.c_str(),rstat)){TDEBUG_TRACE("HgQueryDirstate: lstat("<<abspath<<") fails");return0;}ppd=dirstatecache::get(hgroot);if(!ppd){TDEBUG_TRACE("HgQueryDirstate: dirstatecache::get("<<hgroot<<") returns 0");return0;}for(size_ti=0;i<relpath.size();++i){if(relpath[i]=='\\')relpath[i]='/';}return1;}intHgQueryDirstateDirectory(conststd::string&hgroot,conststd::string&abspath,std::string&relpath,char&outStatus){constdirstate*pd=0;struct_statstat;if(!HgQueryDirstate(hgroot,abspath,relpath,pd,stat)){TDEBUG_TRACE("HgQueryDirstateDirectory: HgQueryDirstate returns 0."<<" hgroot = "<<hgroot<<", abspath = "<<abspath);return0;}booladded=false;boolmodified=false;boolempty=true;size_trootlen=hgroot.size();size_tlen=relpath.size();for(dirstate::Iteriter=pd->begin();iter!=pd->end()&&!modified;++iter){constdirentry&e=*iter;if(e.name.compare(0,len,relpath)!=0)continue;empty=false;switch(e.state){case'n':
if(!modified){std::stringtemp=hgroot;temp+="/";temp+=e.name;if(0==lstat(temp.c_str(),stat))modified=(e.status(stat)=='M');}break;case'm':
modified=true;break;case'a':
added=true;break;}}if(modified)outStatus='M';elseif(added)outStatus='A';elseif(empty)outStatus='?';elseoutStatus='C';return1;}intHgQueryDirstateFile(conststd::string&hgroot,conststd::string&abspath,std::string&relpath,char&outStatus){constdirstate*pd=0;struct_statstat;if(!HgQueryDirstate(hgroot,abspath,relpath,pd,stat)){TDEBUG_TRACE("HgQueryDirstateFile: HgQueryDirstate returns 0."<<" hgroot = "<<hgroot<<", abspath = "<<abspath);return0;}for(dirstate::Iteriter=pd->begin();iter!=pd->end();++iter){constdirentry&e=*iter;if(relpath==e.name){outStatus=e.status(stat);returnoutStatus!='?';}}return0;}staticchar*revhash_string(constcharrevhash[HASH_LENGTH]){unsignedix;staticcharrev_string[HASH_LENGTH*2+1];staticchar*hexval="0123456789abcdef";for(ix=0;ix<HASH_LENGTH;++ix){rev_string[ix*2]=hexval[(revhash[ix]>>4)&0xf];rev_string[ix*2+1]=hexval[revhash[ix]&0xf];}rev_string[sizeof(rev_string)]=0;returnrev_string;}voidtestread(){std::auto_ptr<dirstate>pd=dirstate::read(".hg/dirstate");time_tt;char*s;unsignedix;printf("parent1: %s\n",revhash_string(pd->parent1));printf("parent2: %s\n",revhash_string(pd->parent2));printf("entries: %d\n\n",pd->size());for(dirstate::Iteri=pd->begin();i!=pd->end();++i){t=i->mtime;s=ctime(&t);s[strlen(s)-1]='\0';printf("%s %s\n",s,i->name.c_str());}}#if 0int main(int argc, char *argv[]){ testread(); return 0;}#endif
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