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source: trunk/Mars/mcore/fits.h@ 17048

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Last change on this file since 17048 was 17035, checked in by lyard, 11 years ago
Added error when using wrong fits class and adapted MRawFitsRead to deal with compressed .fz fits
File size: 30.8 KB

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1	#ifndef MARS_fits
2	#define MARS_fits
3
4	#ifdef __CINT__
5	#define int8_t Char_t
6	#define int16_t Short_t
7	#define int32_t Int_t
8	#define int64_t Long64_t
9	#define uint8_t UChar_t
10	#define uint16_t UShort_t
11	#define uint32_t UInt_t
12	#define uint64_t ULong64_t
13	#else
14	#include <stdint.h>
15	#endif
16
17	#include <map>
18	#include <string>
19	#include <fstream>
20	#include <sstream>
21	#include <algorithm>
22
23	#ifdef __EXCEPTIONS
24	#include <stdexcept>
25	#endif
26
27	#ifdef __CINT__
28	#define off_t size_t
29	#endif
30
31	#if !defined(__MARS__) && !defined(__CINT__)
32	#include <unordered_map>
33	#endif
34
35	#ifndef __MARS__
36	#include <vector>
37	#include <iomanip>
38	#include <iostream>
39	#define gLog cerr
40	#define ___err___ ""
41	#define ___warn___ ""
42	#define ___all___ ""
43	#else
44	#include "MLog.h"
45	#include "MLogManip.h"
46	#define ___err___ err
47	#define ___warn___ warn
48	#define ___all___ all
49	#endif
50
51	#if defined(HAVE_ZLIB) \|\| defined(__CINT__)
52	#include "izstream.h"
53	#else
54	#include <fstream>
55	#define izstream ifstream
56	#warning Support for zipped FITS files disabled.
57	#endif
58
59	#include "checksum.h"
60
61	#ifndef __MARS__
62	namespace std
63	{
64	#else
65	using namespace std;
66	#endif
67
68	class fits : public izstream
69	{
70	public:
71	//I know I know, you're going to yiell that this does not belong here.
72	//It will belong in the global scope eventually, and it makes the coding of zfits much simpler this way.
73	enum Compression_t
74	{
75	kCompUnknown,
76	kCompFACT
77	};
78
79	struct Entry
80	{
81	char type;
82	string value;
83	string comment;
84	string fitsString;
85
86	template<typename T>
87	T Get() const
88	{
89	T t;
90
91	istringstream str(value);
92	str >> t;
93
94	return t;
95	}
96	};
97
98	struct Table
99	{
100	off_t offset;
101
102	bool is_compressed;
103
104	string name;
105	size_t bytes_per_row;
106	size_t num_rows;
107	size_t num_cols;
108	size_t total_bytes; // NAXIS1*NAXIS2
109
110	struct Column
111	{
112	size_t offset;
113	size_t num;
114	size_t size;
115	size_t bytes; // num*size
116	char type;
117	string unit;
118	Compression_t comp;
119	};
120
121	typedef map<string, Entry> Keys;
122	typedef map<string, Column> Columns;
123	typedef vector<Column> SortedColumns;
124
125	Columns cols;
126	SortedColumns sorted_cols;
127	Keys keys;
128
129	int64_t datasum;
130
131	string Trim(const string &str, char c=' ') const
132	{
133	// Trim Both leading and trailing spaces
134	const size_t pstart = str.find_first_not_of(c); // Find the first character position after excluding leading blank spaces
135	const size_t pend = str.find_last_not_of(c); // Find the first character position from reverse af
136
137	// if all spaces or empty return an empty string
138	if (string::npos==pstart \|\| string::npos==pend)
139	return string();
140
141	return str.substr(pstart, pend-pstart+1);
142	}
143
144	bool Check(const string &key, char type, const string &value="") const
145	{
146	const Keys::const_iterator it = keys.find(key);
147	if (it==keys.end())
148	{
149	ostringstream str;
150	str << "Key '" << key << "' not found.";
151	#ifdef __EXCEPTIONS
152	throw runtime_error(str.str());
153	#else
154	gLog << ___err___ << "ERROR - " << str.str() << endl;
155	return false;
156	#endif
157	}
158
159	if (it->second.type!=type)
160	{
161	ostringstream str;
162	str << "Wrong type for key '" << key << "': expected " << type << ", found " << it->second.type << ".";
163	#ifdef __EXCEPTIONS
164	throw runtime_error(str.str());
165	#else
166	gLog << ___err___ << "ERROR - " << str.str() << endl;
167	return false;
168	#endif
169	}
170
171	if (!value.empty() && it->second.value!=value)
172	{
173	ostringstream str;
174	str << "Wrong value for key '" << key << "': expected " << value << ", found " << it->second.value << ".";
175	#ifdef __EXCEPTIONS
176	throw runtime_error(str.str());
177	#else
178	gLog << ___err___ << "ERROR - " << str.str() << endl;
179	return false;
180	#endif
181	}
182
183	return true;
184	}
185
186	Keys ParseBlock(const vector<string> &vec) const
187	{
188	map<string,Entry> rc;
189
190	for (unsigned int i=0; i<vec.size(); i++)
191	{
192	const string key = Trim(vec[i].substr(0,8));
193	// Keywords without a value, like COMMENT / HISTORY
194	if (vec[i].substr(8,2)!="= ")
195	continue;
196
197	char type = 0;
198
199	string com;
200	string val = Trim(vec[i].substr(10));
201
202	if (val[0]=='\'')
203	{
204	// First skip all '' in the string
205	size_t p = 1;
206	while (1)
207	{
208	const size_t pp = val.find_first_of('\'', p);
209	if (pp==string::npos)
210	break;
211
212	p = val[pp+1]=='\'' ? pp+2 : pp+1;
213	}
214
215	// Now find the comment
216	const size_t ppp = val.find_first_of('/', p);
217
218	// Set value, comment and type
219	// comments could be just spaces. take care of this.
220	if (ppp!=string::npos && val.size() != ppp+1)
221	com = Trim(val.substr(ppp+1));
222
223	val = Trim(val.substr(1, p-2));
224	type = 'T';
225	}
226	else
227	{
228	const size_t p = val.find_first_of('/');
229
230	if (val.size() != p+1)
231	com = Trim(val.substr(p+2));
232
233	val = Trim(val.substr(0, p));
234
235	if (val.empty() \|\| val.find_first_of('T')!=string::npos \|\| val.find_first_of('F')!=string::npos)
236	type = 'B';
237	else
238	type = val.find_last_of('.')==string::npos ? 'I' : 'F';
239	}
240
241	const Entry e = { type, val, com, vec[i] };
242
243	rc[key] = e;
244	}
245
246	return rc;
247	}
248
249	Table() : offset(0) { }
250	Table(const vector<string> &vec, off_t off) : offset(off),
251	keys(ParseBlock(vec))
252	{
253	is_compressed = HasKey("ZTABLE") && Check("ZTABLE", 'B', "T");
254
255	if (!Check("XTENSION", 'T', "BINTABLE") \|\|
256	!Check("NAXIS", 'I', "2") \|\|
257	!Check("BITPIX", 'I', "8") \|\|
258	!Check("GCOUNT", 'I', "1") \|\|
259	!Check("EXTNAME", 'T') \|\|
260	!Check("NAXIS1", 'I') \|\|
261	!Check("NAXIS2", 'I') \|\|
262	!Check("TFIELDS", 'I'))
263	return;
264
265	if (is_compressed)
266	{
267	if (!Check("ZNAXIS1", 'I') \|\|
268	!Check("ZNAXIS2", 'I') \|\|
269	!Check("ZPCOUNT", 'I', "0"))
270	return;
271	}
272	else
273	{
274	if (!Check("PCOUNT", 'I', "0"))
275	return;
276	}
277
278	total_bytes = Get<size_t>("NAXIS1")*Get<size_t>("NAXIS2");
279	bytes_per_row = is_compressed ? Get<size_t>("ZNAXIS1") : Get<size_t>("NAXIS1");
280	num_rows = is_compressed ? Get<size_t>("ZNAXIS2") : Get<size_t>("NAXIS2");
281	num_cols = Get<size_t>("TFIELDS");
282	datasum = is_compressed ? Get<int64_t>("ZDATASUM", -1) : Get<int64_t>("DATASUM", -1);
283
284	size_t bytes = 0;
285
286	const string tFormName = is_compressed ? "ZFORM" : "TFORM";
287	for (long long unsigned int i=1; i<=num_cols; i++)
288	{
289	const string num(to_string(i));
290
291	if (!Check("TTYPE"+num, 'T') \|\|
292	!Check(tFormName+num, 'T'))
293	return;
294
295	const string id = Get<string>("TTYPE"+num);
296	const string fmt = Get<string>(tFormName+num);
297	const string unit = Get<string>("TUNIT"+num, "");
298	const string comp = Get<string>("ZCTYP"+num, "");
299
300	Compression_t compress = kCompUnknown;
301	if (comp == "FACT")
302	compress = kCompFACT;
303
304	istringstream sin(fmt);
305	int n = 0;
306	sin >> n;
307	if (!sin)
308	n = 1;
309
310	const char type = fmt[fmt.length()-1];
311
312	size_t size = 0;
313	switch (type)
314	{
315	// We could use negative values to mark floats
316	// otheriwse we could just cast them to int64_t?
317	case 'L': // logical
318	case 'A': // char
319	case 'B': size = 1; break; // byte
320	case 'I': size = 2; break; // short
321	case 'J': size = 4; break; // int
322	case 'K': size = 8; break; // long long
323	case 'E': size = 4; break; // float
324	case 'D': size = 8; break; // double
325	// case 'X': size = n; break; // bits (n=number of bytes needed to contain all bits)
326	// case 'C': size = 8; break; // complex float
327	// case 'M': size = 16; break; // complex double
328	// case 'P': size = 8; break; // array descriptor (32bit)
329	// case 'Q': size = 16; break; // array descriptor (64bit)
330	default:
331	{
332	ostringstream str;
333	str << "FITS format TFORM='" << fmt << "' not yet supported.";
334	#ifdef __EXCEPTIONS
335	throw runtime_error(str.str());
336	#else
337	gLog << ___err___ << "ERROR - " << str.str() << endl;
338	return;
339	#endif
340	}
341	}
342
343	const Table::Column col = { bytes, n, size, n*size, type, unit, compress};
344
345	cols[id] = col;
346	sorted_cols.push_back(col);
347	bytes += n*size;
348	}
349
350	if (bytes!=bytes_per_row)
351	{
352	#ifdef __EXCEPTIONS
353	throw runtime_error("Column size mismatch");
354	#else
355	gLog << ___err___ << "ERROR - Column size mismatch" << endl;
356	return;
357	#endif
358	}
359
360	name = Get<string>("EXTNAME");
361	}
362
363	void PrintKeys(bool display_all=false) const
364	{
365	for (Keys::const_iterator it=keys.begin(); it!=keys.end(); it++)
366	{
367	if (!display_all &&
368	(it->first.substr(0, 6)=="TTYPE" \|\|
369	it->first.substr(0, 6)=="TFORM" \|\|
370	it->first.substr(0, 6)=="TUNIT" \|\|
371	it->first=="TFIELDS" \|\|
372	it->first=="XTENSION" \|\|
373	it->first=="NAXIS" \|\|
374	it->first=="BITPIX" \|\|
375	it->first=="PCOUNT" \|\|
376	it->first=="GCOUNT")
377	)
378	continue;
379
380	gLog << ___all___ << setw(2) << it->second.type << '\|' << it->first << '=' << it->second.value << '/' << it->second.comment << '\|' << endl;
381	}}
382
383	void PrintColumns() const
384	{
385	typedef map<pair<size_t, string>, Column> Sorted;
386
387	Sorted sorted;
388
389	for (Columns::const_iterator it=cols.begin(); it!=cols.end(); it++)
390	sorted[make_pair(it->second.offset, it->first)] = it->second;
391
392	for (Sorted::const_iterator it=sorted.begin(); it!=sorted.end(); it++)
393	{
394	gLog << ___all___ << setw(6) << it->second.offset << "\| ";
395	gLog << it->second.num << 'x';
396	switch (it->second.type)
397	{
398	case 'A': gLog << "char(8)"; break;
399	case 'L': gLog << "bool(8)"; break;
400	case 'B': gLog << "byte(8)"; break;
401	case 'I': gLog << "short(16)"; break;
402	case 'J': gLog << "int(32)"; break;
403	case 'K': gLog << "int(64)"; break;
404	case 'E': gLog << "float(32)"; break;
405	case 'D': gLog << "double(64)"; break;
406	}
407	gLog << ": " << it->first.second << " [" << it->second.unit << "]" << endl;
408	}
409	}
410
411	operator bool() const { return !name.empty(); }
412
413	bool HasKey(const string &key) const
414	{
415	return keys.find(key)!=keys.end();
416	}
417
418	bool HasColumn(const string& col) const
419	{
420	return cols.find(col)!=cols.end();
421	}
422
423	const Columns &GetColumns() const
424	{
425	return cols;
426	}
427
428	const Keys &GetKeys() const
429	{
430	return keys;
431	}
432
433	// Values of keys are always signed
434	template<typename T>
435	T Get(const string &key) const
436	{
437	const map<string,Entry>::const_iterator it = keys.find(key);
438	if (it==keys.end())
439	{
440	ostringstream str;
441	str << "Key '" << key << "' not found." << endl;
442	#ifdef __EXCEPTIONS
443	throw runtime_error(str.str());
444	#else
445	gLog << ___err___ << "ERROR - " << str.str() << endl;
446	return T();
447	#endif
448	}
449	return it->second.Get<T>();
450	}
451
452	// Values of keys are always signed
453	template<typename T>
454	T Get(const string &key, const T &deflt) const
455	{
456	const map<string,Entry>::const_iterator it = keys.find(key);
457	return it==keys.end() ? deflt :it->second.Get<T>();
458	}
459
460	size_t GetN(const string &key) const
461	{
462	const Columns::const_iterator it = cols.find(key);
463	return it==cols.end() ? 0 : it->second.num;
464	}
465
466
467
468	// There may be a gap between the main table and the start of the heap:
469	// this computes the offset
470	streamoff GetHeapShift() const
471	{
472	if (!HasKey("THEAP"))
473	return 0;
474
475	const size_t shift = Get<size_t>("THEAP");
476	return shift <= total_bytes ? 0 : shift - total_bytes;
477	}
478
479	// return total number of bytes 'all inclusive'
480	streamoff GetTotalBytes() const
481	{
482	//get offset of special data area from start of main table
483	const streamoff shift = GetHeapShift();
484
485	//and special data area size
486	const streamoff size = HasKey("PCOUNT") ? Get<streamoff>("PCOUNT") : 0;
487
488	// Get the total size
489	const streamoff total = total_bytes + size + shift;
490
491	// check for padding
492	if (total%2880==0)
493	return total;
494
495	// padding necessary
496	return total + (2880 - (total%2880));
497	}
498	};
499
500	protected:
501	ofstream fCopy;
502
503	Table fTable;
504
505	typedef pair<void*, Table::Column> Address;
506	typedef vector<Address> Addresses;
507	//map<void*, Table::Column> fAddresses;
508	Addresses fAddresses;
509
510	#if defined(__MARS__) \|\| defined(__CINT__)
511	typedef map<string, void*> Pointers;
512	#else
513	typedef unordered_map<string, void*> Pointers;
514	#endif
515	Pointers fPointers;
516
517	vector<vector<char>> fGarbage;
518
519	vector<char> fBufferRow;
520	vector<char> fBufferDat;
521
522	size_t fRow;
523
524	Checksum fChkHeader;
525	Checksum fChkData;
526
527	bool ReadBlock(vector<string> &vec)
528	{
529	int endtag = 0;
530	for (int i=0; i<36; i++)
531	{
532	char c[81];
533	c[80] = 0;
534	read(c, 80);
535	if (!good())
536	break;
537
538	fChkHeader.add(c, 80);
539
540	// if (c[0]==0)
541	// return vector<string>();
542
543	string str(c);
544
545	// if (!str.empty())
546	// cout << setw(2) << i << "\|" << str << "\|" << (endtag?'-':'+') << endl;
547
548	if (endtag==2 \|\| str=="END ")
549	{
550	endtag = 2; // valid END tag found
551	continue;
552	}
553
554	if (endtag==1 \|\| str==" ")
555	{
556	endtag = 1; // end tag not found, but expected to be there
557	continue;
558	}
559
560	vec.push_back(str);
561	}
562
563	// Make sure that no empty vector is returned
564	if (endtag && vec.size()%36==0)
565	vec.emplace_back("END = '' / ");
566
567	return endtag==2;
568	}
569
570	string Compile(const string &key, int16_t i=-1) const
571	{
572	if (i<0)
573	return key;
574
575	ostringstream str;
576	str << key << i;
577	return str.str();
578	}
579
580	void Constructor(const string &fname, string fout, const string& tableName, bool force)
581	{
582	char simple[10];
583	read(simple, 10);
584	if (!good())
585	return;
586
587	if (memcmp(simple, "SIMPLE = ", 10))
588	{
589	clear(rdstate()\|ios::badbit);
590	#ifdef __EXCEPTIONS
591	throw runtime_error("File is not a FITS file.");
592	#else
593	gLog << ___err___ << "ERROR - File is not a FITS file." << endl;
594	return;
595	#endif
596	}
597
598	seekg(0);
599
600	while (good())
601	{
602	vector<string> block;
603	while (1)
604	{
605	// If we search for a table, we implicitly assume that
606	// not finding the table is not an error. The user
607	// can easily check that by eof() && !bad()
608	peek();
609	if (eof() && !bad() && !tableName.empty())
610	{
611	break;
612	}
613	// FIXME: Set limit on memory consumption
614	const int rc = ReadBlock(block);
615	if (!good())
616	{
617	clear(rdstate()\|ios::badbit);
618	#ifdef __EXCEPTIONS
619	throw runtime_error("FITS file corrupted.");
620	#else
621	gLog << ___err___ << "ERROR - FITS file corrupted." << endl;
622	return;
623	#endif
624	}
625
626	if (block.size()%36)
627	{
628	if (!rc && !force)
629	{
630	clear(rdstate()\|ios::badbit);
631	#ifdef __EXCEPTIONS
632	throw runtime_error("END keyword missing in FITS header.");
633	#else
634	gLog << ___err___ << "ERROR - END keyword missing in FITS file... file might be corrupted." << endl;
635	return;
636	#endif
637	}
638	break;
639	}
640	}
641
642	if (block.empty())
643	break;
644
645	if (block[0].substr(0, 9)=="SIMPLE =")
646	{
647	fChkHeader.reset();
648	continue;
649	}
650
651	if (block[0].substr(0, 9)=="XTENSION=")
652	{
653	fTable = Table(block, tellg());
654	fRow = (size_t)-1;
655
656	if (!fTable)
657	{
658	clear(rdstate()\|ios::badbit);
659	return;
660	}
661
662	// Check for table name. Skip until eof or requested table are found.
663	// skip the current table?
664	if ((!tableName.empty() && tableName!=fTable.Get<string>("EXTNAME")) \|\|
665	( tableName.empty() && "ZDrsCellOffsets"==fTable.Get<string>("EXTNAME")))
666	{
667	const streamoff skip = fTable.GetTotalBytes();
668	seekg(skip, ios_base::cur);
669
670	fChkHeader.reset();
671
672	continue;
673	}
674
675	fBufferRow.resize(fTable.bytes_per_row + 8-fTable.bytes_per_row%4);
676	fBufferDat.resize(fTable.bytes_per_row);
677
678	break;
679	}
680	}
681
682	if (fout.empty())
683	return;
684
685	if (*fout.rbegin()=='/')
686	{
687	const size_t p = fname.find_last_of('/');
688	fout.append(fname.substr(p+1));
689	}
690
691	fCopy.open(fout);
692	if (!fCopy)
693	{
694	clear(rdstate()\|ios::badbit);
695	#ifdef __EXCEPTIONS
696	throw runtime_error("Could not open output file.");
697	#else
698	gLog << ___err___ << "ERROR - Failed to open output file." << endl;
699	#endif
700	}
701
702	const streampos p = tellg();
703	seekg(0);
704
705	vector<char> buf(p);
706	read(buf.data(), p);
707
708	fCopy.write(buf.data(), p);
709	if (!fCopy)
710	clear(rdstate()\|ios::badbit);
711	}
712
713	public:
714	fits(const string &fname, const string& tableName="", bool force=false) : izstream(fname.c_str())
715	{
716	gLog << "Here..." <<endl;
717	Constructor(fname, "", tableName, force);
718	if ((fTable.is_compressed && !force) \|\|
719	(fTable.name == "ZDrsCellOffsets" && !force))
720	{
721	#ifdef __EXCEPTIONS
722	throw runtime_error("You are trying to read a compressed fits with the base fits class. Please use factfits instead.");
723	#else
724	gLog << ___err___ << "ERROR - You are trying to read a compressed fits with the base fits class. Please use factfits instead." << endl;
725	#endif
726	clear(rdstate()\|ios::badbit);
727	}
728	}
729
730	fits(const string &fname, const string &fout, const string& tableName, bool force=false) : izstream(fname.c_str())
731	{
732	gLog << "There..." << endl;
733	Constructor(fname, fout, tableName, force);
734	if ((fTable.is_compressed && !force) \|\|
735	(fTable.name == "ZDrsCellOffsets" && !force))
736	{
737	#ifdef __EXCEPTIONS
738	throw runtime_error("You are trying to read a compressed fits with the base fits class. Please use factfits instead.");
739	#else
740	gLog << ___err___ << "ERROR - You are trying to read a compressed fits with the base fits class. Please use factfits instead." << endl;
741	#endif
742	clear(rdstate()\|ios::badbit);
743	}
744	}
745
746	fits() : izstream()
747	{
748
749	}
750
751	~fits()
752	{
753	copy(istreambuf_iterator<char>(*this),
754	istreambuf_iterator<char>(),
755	ostreambuf_iterator<char>(fCopy));
756	}
757
758	virtual void StageRow(size_t row, char* dest)
759	{
760	// if (row!=fRow+1) // Fast seeking is ensured by izstream
761	seekg(fTable.offset+row*fTable.bytes_per_row);
762	read(dest, fTable.bytes_per_row);
763	//fin.clear(fin.rdstate()&~ios::eofbit);
764	}
765
766	virtual void WriteRowToCopyFile(size_t row)
767	{
768	if (row==fRow+1)
769	{
770	const uint8_t offset = (row*fTable.bytes_per_row)%4;
771
772	fChkData.add(fBufferRow);
773	if (fCopy.is_open() && fCopy.good())
774	fCopy.write(fBufferRow.data()+offset, fTable.bytes_per_row);
775	if (!fCopy)
776	clear(rdstate()\|ios::badbit);
777	}
778	else
779	if (fCopy.is_open())
780	clear(rdstate()\|ios::badbit);
781	}
782
783	void ZeroBufferForChecksum(vector<char>& vec, const uint64_t extraZeros=0)
784	{
785	auto ib = vec.begin();
786	auto ie = vec.end();
787
788	*ib++ = 0;
789	*ib++ = 0;
790	*ib++ = 0;
791	*ib = 0;
792
793	for (uint64_t i=0;i<extraZeros+8;i++)
794	*--ie = 0;
795	}
796
797	uint8_t ReadRow(size_t row)
798	{
799	// For the checksum we need everything to be correctly aligned
800	const uint8_t offset = (row*fTable.bytes_per_row)%4;
801
802	ZeroBufferForChecksum(fBufferRow);
803
804	StageRow(row, fBufferRow.data()+offset);
805
806	WriteRowToCopyFile(row);
807
808	fRow = row;
809
810	return offset;
811	}
812
813	template<size_t N>
814	void revcpy(char dest, const char src, const int &num)
815	{
816	const char pend = src + numN;
817	for (const char *ptr = src; ptr<pend; ptr+=N, dest+=N)
818	reverse_copy(ptr, ptr+N, dest);
819	}
820
821	virtual void MoveColumnDataToUserSpace(char dest, const char src, const Table::Column& c)
822	{
823	// Let the compiler do some optimization by
824	// knowing that we only have 1, 2, 4 and 8
825	switch (c.size)
826	{
827	case 1: memcpy (dest, src, c.bytes); break;
828	case 2: revcpy<2>(dest, src, c.num); break;
829	case 4: revcpy<4>(dest, src, c.num); break;
830	case 8: revcpy<8>(dest, src, c.num); break;
831	}
832	}
833
834	#if !defined(__MARS__) && !defined(__CINT__)
835	virtual bool GetRow(size_t row, bool check=true)
836	#else
837	virtual bool GetRowNum(size_t row, bool check=true)
838	#endif
839	{
840	if (check && row>=fTable.num_rows)
841	return false;
842
843	const uint8_t offset = ReadRow(row);
844	if (!good())
845	return good();
846
847	const char *ptr = fBufferRow.data() + offset;
848
849	for (Addresses::const_iterator it=fAddresses.begin(); it!=fAddresses.end(); it++)
850	{
851	const Table::Column &c = it->second;
852
853	const char *src = ptr + c.offset;
854	char dest = reinterpret_cast<char>(it->first);
855
856	MoveColumnDataToUserSpace(dest, src, c);
857	}
858
859	return good();
860	}
861
862	bool GetNextRow(bool check=true)
863	{
864	#if !defined(__MARS__) && !defined(__CINT__)
865	return GetRow(fRow+1, check);
866	#else
867	return GetRowNum(fRow+1, check);
868	#endif
869	}
870
871	virtual bool SkipNextRow()
872	{
873	seekg(fTable.offset+(++fRow)*fTable.bytes_per_row);
874	return good();
875	}
876
877	static bool Compare(const Address &p1, const Address &p2)
878	{
879	return p1.first>p2.first;
880	}
881
882	template<class T, class S>
883	const T &GetAs(const string &name)
884	{
885	return reinterpret_cast<S>(fPointers[name]);
886	}
887
888	void *SetPtrAddress(const string &name)
889	{
890	if (fTable.cols.count(name)==0)
891	{
892	ostringstream str;
893	str << "SetPtrAddress('" << name << "') - Column not found." << endl;
894	#ifdef __EXCEPTIONS
895	throw runtime_error(str.str());
896	#else
897	gLog << ___err___ << "ERROR - " << str.str() << endl;
898	return NULL;
899	#endif
900	}
901
902	Pointers::const_iterator it = fPointers.find(name);
903	if (it!=fPointers.end())
904	return it->second;
905
906	fGarbage.emplace_back(fTable.cols[name].bytes);
907
908	void *ptr = fGarbage.back().data();
909
910	fPointers[name] = ptr;
911	fAddresses.emplace_back(ptr, fTable.cols[name]);
912	sort(fAddresses.begin(), fAddresses.end(), Compare);
913	return ptr;
914	}
915
916	template<typename T>
917	bool SetPtrAddress(const string &name, T *ptr, size_t cnt)
918	{
919	if (fTable.cols.count(name)==0)
920	{
921	ostringstream str;
922	str << "SetPtrAddress('" << name << "') - Column not found." << endl;
923	#ifdef __EXCEPTIONS
924	throw runtime_error(str.str());
925	#else
926	gLog << ___err___ << "ERROR - " << str.str() << endl;
927	return false;
928	#endif
929	}
930
931	if (sizeof(T)!=fTable.cols[name].size)
932	{
933	ostringstream str;
934	str << "SetPtrAddress('" << name << "') - Element size mismatch: expected "
935	<< fTable.cols[name].size << " from header, got " << sizeof(T) << endl;
936	#ifdef __EXCEPTIONS
937	throw runtime_error(str.str());
938	#else
939	gLog << ___err___ << "ERROR - " << str.str() << endl;
940	return false;
941	#endif
942	}
943
944	if (cnt!=fTable.cols[name].num)
945	{
946	ostringstream str;
947	str << "SetPtrAddress('" << name << "') - Element count mismatch: expected "
948	<< fTable.cols[name].num << " from header, got " << cnt << endl;
949	#ifdef __EXCEPTIONS
950	throw runtime_error(str.str());
951	#else
952	gLog << ___err___ << "ERROR - " << str.str() << endl;
953	return false;
954	#endif
955	}
956
957	// if (fAddresses.count(ptr)>0)
958	// gLog << warn << "SetPtrAddress('" << name << "') - Pointer " << ptr << " already assigned." << endl;
959
960	//fAddresses[ptr] = fTable.cols[name];
961	fPointers[name] = ptr;
962	fAddresses.emplace_back(ptr, fTable.cols[name]);
963	sort(fAddresses.begin(), fAddresses.end(), Compare);
964	return true;
965	}
966
967	template<class T>
968	bool SetRefAddress(const string &name, T &ptr)
969	{
970	return SetPtrAddress(name, &ptr, sizeof(ptr)/sizeof(T));
971	}
972
973	template<typename T>
974	bool SetVecAddress(const string &name, vector<T> &vec)
975	{
976	return SetPtrAddress(name, vec.data(), vec.size());
977	}
978
979	template<typename T>
980	T Get(const string &key) const
981	{
982	return fTable.Get<T>(key);
983	}
984
985	template<typename T>
986	T Get(const string &key, const string &deflt) const
987	{
988	return fTable.Get<T>(key, deflt);
989	}
990
991	bool SetPtrAddress(const string &name, void *ptr)
992	{
993	if (fTable.cols.count(name)==0)
994	{
995	ostringstream str;
996	str <<"SetPtrAddress('" << name << "') - Column not found." << endl;
997	#ifdef __EXCEPTIONS
998	throw runtime_error(str.str());
999	#else
1000	gLog << ___err___ << "ERROR - " << str.str() << endl;
1001	return false;
1002	#endif
1003	}
1004
1005	// if (fAddresses.count(ptr)>0)
1006	// gLog << warn << "SetPtrAddress('" << name << "') - Pointer " << ptr << " already assigned." << endl;
1007
1008	//fAddresses[ptr] = fTable.cols[name];
1009	fPointers[name] = ptr;
1010	fAddresses.emplace_back(ptr, fTable.cols[name]);
1011	sort(fAddresses.begin(), fAddresses.end(), Compare);
1012	return true;
1013	}
1014
1015	bool HasKey(const string &key) const { return fTable.HasKey(key); }
1016	bool HasColumn(const string& col) const { return fTable.HasColumn(col);}
1017	const Table::Columns &GetColumns() const { return fTable.GetColumns();}
1018	const Table::SortedColumns& GetSortedColumns() const { return fTable.sorted_cols;}
1019	const Table::Keys &GetKeys() const { return fTable.GetKeys();}
1020
1021	int64_t GetInt(const string &key) const { return fTable.Get<int64_t>(key); }
1022	uint64_t GetUInt(const string &key) const { return fTable.Get<uint64_t>(key); }
1023	double GetFloat(const string &key) const { return fTable.Get<double>(key); }
1024	string GetStr(const string &key) const { return fTable.Get<string>(key); }
1025
1026	size_t GetN(const string &key) const
1027	{
1028	return fTable.GetN(key);
1029	}
1030
1031	// size_t GetNumRows() const { return fTable.num_rows; }
1032	size_t GetRow() const { return fRow==(size_t)-1 ? 0 : fRow; }
1033
1034	operator bool() const { return fTable && fTable.offset!=0; }
1035
1036	void PrintKeys() const { fTable.PrintKeys(); }
1037	void PrintColumns() const { fTable.PrintColumns(); }
1038
1039	bool IsHeaderOk() const { return fTable.datasum<0?false:(fChkHeader+Checksum(fTable.datasum)).valid(); }
1040	virtual bool IsFileOk() const { return (fChkHeader+fChkData).valid(); }
1041
1042	bool IsCompressedFITS() const { return fTable.is_compressed;}
1043
1044	virtual size_t GetNumRows() const
1045	{
1046	return fTable.Get<size_t>("NAXIS2");
1047	}
1048
1049	virtual size_t GetBytesPerRow() const
1050	{
1051	return fTable.Get<size_t>("NAXIS1");
1052	}
1053	};
1054
1055	#ifndef __MARS__
1056	};
1057	#endif
1058	#endif

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