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///////////////////////////////////////////////////////////////////////////////
// //
// This file is part of ModelBlocks. Copyright 2009, ModelBlocks developers. //
// //
// ModelBlocks 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 3 of the License, or //
// (at your option) any later version. //
// //
// ModelBlocks 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 ModelBlocks. If not, see <http://www.gnu.org/licenses/>. //
// //
// ModelBlocks developers designate this particular file as subject to //
// the "Moses" exception as provided by ModelBlocks developers in //
// the LICENSE file that accompanies this code. //
// //
///////////////////////////////////////////////////////////////////////////////
#ifndef _NL_STREAM__
#define _NL_STREAM__
#include "nl-string.h"
////////////////////////////////////////////////////////////////////////////////
class IStreamSource {
private:
// Data members...
String sBuff; // string buffer, to allow re-reading in disjunctions
unsigned int iAvail; // index of where string buffer begins; subtract from indices in IStream to get buffer index
FILE* pfSrc; // file pointer
public:
IStreamSource ( FILE* pf ) : sBuff(256), iAvail(0), pfSrc(pf) { }
IStreamSource ( const char* psz ) : sBuff(psz), iAvail(0), pfSrc() { }
char* c_array ( ) { return sBuff.c_array(); }
char get ( unsigned int i ) { assert(i-iAvail<((unsigned int)(-1))/2); // NOTE: PROBLEM IF ANY ISTREAM FALLS BEHIND BY MORE THAN MAXINT CHARACTERS!
int c=0; while(i-iAvail>=sBuff.size()-1){sBuff.add()=((c=getc(pfSrc))==EOF)?'\0':c;} return sBuff.get(i-iAvail); }
char& set ( unsigned int i ) { assert(i-iAvail<((unsigned int)(-1))/2); // NOTE: PROBLEM IF ANY ISTREAM FALLS BEHIND BY MORE THAN MAXINT CHARACTERS!
int c=0; while(i-iAvail>=sBuff.size()-1){sBuff.add()=((c=getc(pfSrc))==EOF)?'\0':c;} return sBuff.set(i-iAvail); }
FILE* getFile ( ) { return pfSrc; }
// Output method...
friend ostream& operator<< ( ostream& os, const IStreamSource& iss ) { return os<<"'"<<iss.sBuff<<"',"<<iss.iAvail<<","<<iss.pfSrc; }
void compress ( ) { iAvail+=strlen(sBuff.c_array()); sBuff=String(256); } // NOTE: NOT TESTED WITH FILES EXCEEDING MAXINT CHARACTERS! (BUT SHOULD WORK)
};
////////////////////////////////////////////////////////////////////////////////
class IStream {
private:
IStreamSource* psrc; // pointer to source of stream, which contains buffer and file pointer
unsigned int iIndex; // stream index; subtract psrc->iAvail to get index in psrc->sBuff
char get ( unsigned int i ) { return psrc->get(i); }
char& set ( unsigned int i ) { return psrc->set(i); }
char* c_array ( unsigned int i=0 ) { return &psrc->set(i); }
public:
IStream ( ) : psrc(NULL), iIndex(0) { }
IStream ( IStreamSource& src, unsigned int i=0 ) : psrc(&src), iIndex(i) { }
IStream ( const IStream& is, unsigned int i ) : psrc(is.psrc), iIndex(i) { }
// Specification methods...
IStream& operator= ( const IStream& is ) { psrc=is.psrc; iIndex=is.iIndex; return *this; }
// Extraction methods...
bool operator== ( const IStream& is ) const { return (psrc==is.psrc && iIndex==is.iIndex); }
bool operator!= ( const IStream& is ) const { return (psrc!=is.psrc || iIndex!=is.iIndex); }
IStreamSource* getSource() { return psrc; }
// Output method...
friend ostream& operator<< ( ostream& os, const IStream& is ) { return os<<is.iIndex<<","<<is.psrc<<","<<*is.psrc; }
// Match single char...
friend IStream operator>> ( IStream is, char& c ) {
// Propagate fail...
if (IStream()==is) return IStream();
c=is.get(is.iIndex);
return ('\0'==c) ? IStream() : IStream(is,is.iIndex+1);
}
// Match string delimiter...
friend IStream operator>> ( IStream is, const char* psDlm ) {
// Propagate fail...
if (IStream()==is) { return IStream(); }
unsigned int i;
// Read in characters until fail or match delimiter...
for (i=0; is.get(i+is.iIndex)!='\0' && psDlm[i]!='\0'; i++)
if (is.get(i+is.iIndex)!=psDlm[i]) return IStream();
return (psDlm[i]=='\0') ? IStream(is,i+is.iIndex) : IStream();
}
// Match anything else followed by zero-terminated string delimiter...
template<class X> friend pair<IStream,X*> operator>> ( IStream is, X& x ) { return pair<IStream,X*>(is,&x); }
template<class X> friend IStream operator>> ( pair<IStream,X*> is_x, const char* psDlm ) {
IStream& is = is_x.first;
X& x = *is_x.second;
// Propagate fail...
if (IStream()==is) { return IStream(); }
unsigned int d = strlen(psDlm);
// Read in characters until fail or match delimiter...
for (unsigned int i=is.iIndex; is.get(i)!='\0'; i++) {
// Try to match delimiter ending at current point in stream...
if ( i-is.iIndex+1>=d ) {
unsigned int j;
for (j=0; j<d && is.get(i+1+j-d)==psDlm[j]; j++);
////cerr<<"-->i="<<i<<",j="<<j<<",d="<<d<<",delim='"<<psDlm<<"',curr='"<<is.get(i)<<"' "<<is<<"\n";
if (j==d) {
is.set(i+1-d)='\0'; x=X(is.c_array(is.iIndex)); is.set(i+1-d)=psDlm[0];
return IStream(is,i+1);
}
}
}
return IStream();
}
// Match integer followed by zero-terminated string delimiter...
friend IStream operator>> ( pair<IStream,int*> is_x, const char* psDlm ) {
IStream& is = is_x.first;
int& x = *is_x.second;
// Propagate fail...
if (IStream()==is) return IStream();
unsigned int d = strlen(psDlm);
// Read in characters until fail or match delimiter...
for (unsigned int i=is.iIndex; is.get(i)!='\0'; i++) {
// Try to match delimiter ending at current point in stream...
if ( i+1>=is.iIndex+d ) {
unsigned int j;
for (j=0; j<d && is.get(i+1+j-d)==psDlm[j]; j++);
if (j==d) {
is.set(i+1-d)='\0'; x=atoi(is.c_array(is.iIndex)); is.set(i+1-d)=psDlm[0];
return IStream(is,i+1);
}
}
}
return IStream();
}
// Match unsigned int followed by zero-terminated string delimiter...
friend IStream operator>> ( pair<IStream,unsigned int*> is_x, const char* psDlm ) {
IStream& is = is_x.first;
unsigned int& x = *is_x.second;
// Propagate fail...
if (IStream()==is) return IStream();
unsigned int d = strlen(psDlm);
// Read in characters until fail or match delimiter...
for (unsigned int i=is.iIndex; is.get(i)!='\0'; i++) {
// Try to match delimiter ending at current point in stream...
if ( i+1>=is.iIndex+d ) {
unsigned int j;
for (j=0; j<d && is.get(i+1+j-d)==psDlm[j]; j++);
if (j==d) {
is.set(i+1-d)='\0'; x=atoi(is.c_array(is.iIndex)); is.set(i+1-d)=psDlm[0];
return IStream(is,i+1);
}
}
}
return IStream();
}
// Match float followed by zero-terminated string delimiter...
friend IStream operator>> ( pair<IStream,float*> is_x, const char* psDlm ) {
IStream& is = is_x.first;
float& x = *is_x.second;
// Propagate fail...
if (IStream()==is) return IStream();
unsigned int d = strlen(psDlm);
// Read in characters until fail or match delimiter...
for (unsigned int i=is.iIndex; is.get(i)!='\0'; i++) {
// Try to match delimiter ending at current point in stream...
if ( i+1>=is.iIndex+d ) {
unsigned int j;
for (j=0; j<d && is.get(i+1+j-d)==psDlm[j]; j++);
if (j==d) {
is.set(i+1-d)='\0'; x=atof(is.c_array(is.iIndex)); is.set(i+1-d)=psDlm[0];
return IStream(is,i+1);
}
}
}
return IStream();
}
// Match double followed by zero-terminated string delimiter...
friend IStream operator>> ( pair<IStream,double*> is_x, const char* psDlm ) {
IStream& is = is_x.first;
double& x = *is_x.second;
// Propagate fail...
if (IStream()==is) return IStream();
unsigned int d = strlen(psDlm);
// Read in characters until fail or match delimiter...
for (unsigned int i=is.iIndex; is.get(i)!='\0'; i++) {
// Try to match delimiter ending at current point in stream...
if ( i+1>=is.iIndex+d ) {
unsigned int j;
for (j=0; j<d && is.get(i+1+j-d)==psDlm[j]; j++);
if (j==d) {
is.set(i+1-d)='\0'; x=atof(is.c_array(is.iIndex)); is.set(i+1-d)=psDlm[0];
return IStream(is,i+1);
}
}
}
return IStream();
}
// Match void pointer followed by zero-terminated string delimiter...
friend IStream operator>> ( pair<IStream,void**> is_x, const char* psDlm ) {
IStream& is = is_x.first;
// Propagate fail...
if (IStream()==is) return IStream();
unsigned int d = strlen(psDlm);
// Read in characters until fail or match delimiter...
for (unsigned int i=is.iIndex; is.get(i)!='\0'; i++) {
// Try to match delimiter ending at current point in stream...
if ( i+1>=is.iIndex+d ) {
unsigned int j;
for (j=0; j<d && is.get(i+1+j-d)==psDlm[j]; j++);
if (j==d) return IStream(is,i+1);
}
}
return IStream();
}
};
#endif //_NL_STREAM__
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