FastMRCLib Files

FastMRCLib is a small and simple library for reading and parsing MARC records (ISO-2709).
This library uses STL and MD5Lib (which has been included)
Algoritm based on MARC 21 Specifications for Record Structure: http://www.loc.gov/marc/specifications/specrecstruc.html

Features:
 - read records from stream
 - read record ID from field 001
 - build MD5 digest
 - iterate over all fields and subfields
 - get fields by specified tag
 - get control field data
 - get subfield data
 
 
 The main classes are:
 fastmrc::Record
 fastmrc::Field
 fastmrc::ControlField
 fastmrc::DataField
 fastmrc::Subfield
 fastmrc::FieldTag
 fastmrc::MrcException
 
Changes
-------
 Version 2010.12.23 - initial version
 
 Version 2011.02.02
 Added checking for out of record's buffer, which prevents fail if stream format  is not well-formed.
 
 Version 2011.03.17
 Added new methods 
	to fastmrc::Record: 
	const char* getData() const;
	unsigned getDatalen() const;
	
	to fastmrc::DataField:
	SubfieldListCIt getSubfield(char code, SubfieldListCIt _start);
 Was made some small changes in interface.
 
 Version 2013.08.27
 Reusing record buffer in Record::readRec
 New constructor Record(const char* _buf, unsigned _bufsize); // Create record from buffer
 Refactoring
 x64 build
 
Example of using this library
-----------------------------
 
#include "FastMRC.h"
 
ifstream ifs("filename.mrc", ios::in|ios::binary);
fastmrc::Record rec;
int id;
unsigned char digest[16];
while(ifs >> rec)
{
	// get ID
	id = rec.getId();
	// get MD5
	rec.getMD5(digest);
	
	// parse record and get field CAT
	fastmrc::Record::FieldMapCIt it = rec.getFirstField("CAT");
	if (it == rec.getFMapEnd())
			printf("Warning! Field 'CAT' not found. rec id: %09d\n", id);
	else
	{
		f = it->second;
		if (!f->isControl())
		{
			df = (fastmrc::DataField *) f;
			// parse datafield and get subfields
			fastmrc::DataField::SubfieldListCIt sfit = df->getSFListBegin();
			
			if (sfit != df->getSFListEnd())
			{
				// doing comething with subfields ...
				
			}
		}
	}
}