/*

 * bibl.c

 *

 * Copyright (c) Chris Putnam 2005-2018

 *

 * Source code released under the GPL version 2

 *

 */

#include <stdio.h>

#include <stdlib.h>

#include "bibl.h"

void

bibl_init( bibl *b )

{

	b->nrefs = b->maxrefs = 0L;

	b->ref = NULL;

}

static int

bibl_malloc( bibl * b )

{

	int alloc = 50;

	b->nrefs = 0;

	b->ref = ( fields ** ) malloc( sizeof( fields* ) * alloc );

	if ( b->ref ) {

		b->maxrefs = alloc;

		return 1;

	} else {

		fprintf( stderr, "%s: allocation error\n", __FUNCTION__ );

		return 0;

	}

}

static int

bibl_realloc( bibl * b )

{

	int alloc = b->maxrefs * 2;

	fields **more;

	more = ( fields ** ) realloc( b->ref, sizeof( fields* ) * alloc );

	if ( more ) {

		b->ref = more;

		b->maxrefs = alloc;

		return 1;

	} else {

		fprintf( stderr, "%s: allocation error\n", __FUNCTION__ );

		return 0;

	}

}

int

bibl_addref( bibl *b, fields *ref )

{

	int ok = 1;

	if ( b->maxrefs==0 ) ok = bibl_malloc( b );

	else if ( b->nrefs >= b->maxrefs ) ok = bibl_realloc( b );

	if ( ok ) {

		b->ref[ b->nrefs ] = ref;

		b->nrefs++;

	}

	return ok;

}

void

bibl_free( bibl *b )

{

	long i;

	for ( i=0; i<b->nrefs; ++i )

		fields_delete( b->ref[i] );

	if ( b->ref ) free( b->ref );

	b->ref = NULL;

	b->nrefs = b->maxrefs = 0;

}

/* bibl_copy()

 *

 * returns 1 on success, 0 on failure (memory error)

 */

int

bibl_copy( bibl *bout, bibl *bin )

{

	fields *refin, *refout;

	int i, j, n, status, ok, level;

	char *tag, *value;

	for ( i=0; i<bin->nrefs; ++i ) {

		refin = bin->ref[i];

		refout = fields_new();

		if ( !refout ) return 0;

		n = fields_num( refin );

		for ( j=0; j

			tag   = fields_tag( refin, j, FIELDS_CHRP );

			value = fields_value( refin, j, FIELDS_CHRP );

			level = fields_level( refin, j );

			if ( tag && value ) {

				status = fields_add_can_dup( refout, tag, value, level );

				if ( status!=FIELDS_OK ) return 0;

			}

		}

		ok = bibl_addref( bout, refout );

		if ( !ok ) return 0;

	}

	return 1;

}