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The C and C++ Include Header Files

cat -n /usr/include/openssl/txt_db.h

     1	/*
     2	 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
     3	 *
     4	 * Licensed under the Apache License 2.0 (the "License").  You may not use
     5	 * this file except in compliance with the License.  You can obtain a copy
     6	 * in the file LICENSE in the source distribution or at
     7	 * https://www.openssl.org/source/license.html
     8	 */
     9	
    10	#ifndef OPENSSL_TXT_DB_H
    11	#define OPENSSL_TXT_DB_H
    12	#pragma once
    13	
    14	#include <openssl/macros.h>
    15	#ifndef OPENSSL_NO_DEPRECATED_3_0
    16	#define HEADER_TXT_DB_H
    17	#endif
    18	
    19	#include <openssl/opensslconf.h>
    20	#include <openssl/bio.h>
    21	#include <openssl/safestack.h>
    22	#include <openssl/lhash.h>
    23	
    24	#define DB_ERROR_OK 0
    25	#define DB_ERROR_MALLOC 1
    26	#define DB_ERROR_INDEX_CLASH 2
    27	#define DB_ERROR_INDEX_OUT_OF_RANGE 3
    28	#define DB_ERROR_NO_INDEX 4
    29	#define DB_ERROR_INSERT_INDEX_CLASH 5
    30	#define DB_ERROR_WRONG_NUM_FIELDS 6
    31	
    32	#ifdef __cplusplus
    33	extern "C" {
    34	#endif
    35	
    36	typedef OPENSSL_STRING *OPENSSL_PSTRING;
    37	DEFINE_SPECIAL_STACK_OF(OPENSSL_PSTRING, OPENSSL_STRING)
    38	
    39	typedef struct txt_db_st {
    40	    int num_fields;
    41	    STACK_OF(OPENSSL_PSTRING) *data;
    42	    LHASH_OF(OPENSSL_STRING) **index;
    43	    int (**qual)(OPENSSL_STRING *);
    44	    long error;
    45	    long arg1;
    46	    long arg2;
    47	    OPENSSL_STRING *arg_row;
    48	} TXT_DB;
    49	
    50	TXT_DB *TXT_DB_read(BIO *in, int num);
    51	long TXT_DB_write(BIO *out, TXT_DB *db);
    52	int TXT_DB_create_index(TXT_DB *db, int field, int (*qual)(OPENSSL_STRING *),
    53	    OPENSSL_LH_HASHFUNC hash, OPENSSL_LH_COMPFUNC cmp);
    54	void TXT_DB_free(TXT_DB *db);
    55	OPENSSL_STRING *TXT_DB_get_by_index(TXT_DB *db, int idx,
    56	    OPENSSL_STRING *value);
    57	int TXT_DB_insert(TXT_DB *db, OPENSSL_STRING *value);
    58	
    59	#ifdef __cplusplus
    60	}
    61	#endif
    62	
    63	#endif