structures.h

一个google的OCR源码

/* -*-C-*-
 ********************************************************************************
 *
 * File:        structures.h  (Formerly structures.h)
 * Description:  Allocate all the different types of structures.
 * Author:       Mark Seaman, OCR Technology
 * Created:      Wed May 30 10:12:12 1990
 * Modified:     Tue May 21 11:07:47 1991 (Mark Seaman) marks@hpgrlt
 * Language:     C
 * Package:      N/A
 * Status:       Experimental (Do Not Distribute)
 *
 * (c) Copyright 1990, Hewlett-Packard Company.
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
 ** You may obtain a copy of the License at
 ** http://www.apache.org/licenses/LICENSE-2.0
 ** Unless required by applicable law or agreed to in writing, software
 ** distributed under the License is distributed on an "AS IS" BASIS,
 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 ** See the License for the specific language governing permissions and
 ** limitations under the License.
 *
 *********************************************************************************/
#ifndef STRUCTURES_H
#define STRUCTURES_H

/*----------------------------------------------------------------------
              I n c l u d e s
----------------------------------------------------------------------*/
#include "tessclas.h"
#include "oldlist.h"
#include "freelist.h"
#include "danerror.h"

#define NUM_DATA_TYPES 20

extern int max_data_types;
extern void_void memory_print_functions[NUM_DATA_TYPES];

/*----------------------------------------------------------------------
              M a c r o s
----------------------------------------------------------------------*/
/**********************************************************************
 * makestructure
 *
 * Allocate a chunk of memory for a particular data type.  This macro
 * defines an allocation, deallocation, and status printing function
 * for each new data type.
 **********************************************************************/

#define makestructure(newfunc,old,print,type,nextfree,blocksize,typestring,usecount)                \
type *newfunc()                                                                  \
{                                                                            \
	return new type; \
}                                                                            \
																									\
																									\
																									\
void old(type* deadelement)                                                       \
{                                                                            \
	delete deadelement; \
}                                                                            \


/**********************************************************************
 * newstructure
 *
 * Allocate a chunk of memory for a particular data type.
 **********************************************************************/

#define newstructure(name,type,nextfree,blocksize,errorstring,usecount)\
type *name()											/*returns a new type*/\
{\
	return new type;\
}

/**********************************************************************
 * oldstructure
 *
 * Returns a structure to the freelist
 **********************************************************************/

#define oldstructure(name,type,nextfree,stringtype,usecount)\
\
type *name(type* deadelement)\
{\
	type                    *returnelement;				/*return next ptr*/\
\
	returnelement=deadelement->next;					/*return link*/\
	delete deadelement;  \
	return returnelement;\
}

/*----------------------------------------------------------------------
              F u n c t i o n s
----------------------------------------------------------------------*/
extern TBLOB *newblob();
extern TBLOB *oldblob(TBLOB *);

extern TESSLINE *newoutline();
extern void oldoutline(TESSLINE *);

extern EDGEPT *newedgept();
extern EDGEPT *oldedgept(EDGEPT *);

extern TWERD *newword();
extern void oldword(TWERD *);

extern LIST new_cell();
extern void free_cell(LIST);
#endif