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/* tables_shared.h - tables serialization header
*
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Vern Paxson.
*
* The United States Government has rights in this work pursuant
* to contract no. DE-AC03-76SF00098 between the United States
* Department of Energy and the University of California.
*
* This file is part of flex.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE.
*/
/* This file is meant to be included in both the skeleton and the actual
* flex code (hence the name "_shared").
*/
/* Structures and prototypes for serializing flex tables. The
* binary format is documented in the manual.
*
* Design considerations:
*
* - The format allows many tables per file.
* - The tables can be streamed.
* - All data is stored in network byte order.
* - We do not hinder future unicode support.
* - We can lookup tables by name.
*/
/** Magic number for serialized format. */
#define YYTBL_MAGIC 0xF13C57B1
/** Possible values for t_id field. Each one corresponds to a
* scanner table of the same name.
*/
enum yytbl_id {
YYT_ID_ACCEPT = 0x01,
YYT_ID_BASE = 0x02,
YYT_ID_CHK = 0x03,
YYT_ID_DEF = 0x04,
YYT_ID_EC = 0x05,
YYT_ID_META = 0x06,
YYT_ID_NUL_TRANS = 0x07,
YYT_ID_NXT = 0x08, /**< may be 2 dimensional array */
YYT_ID_RULE_CAN_MATCH_EOL = 0x09,
YYT_ID_START_STATE_LIST = 0x0A, /**< array of pointers */
YYT_ID_TRANSITION = 0x0B /**< array of structs */
};
/** bit flags for t_flags field of struct yytbl_data */
enum yytbl_flags {
YYT_DATA8 = 0x01, /**< data is an array of type int8_t */
YYT_DATA16 = 0x02, /**< data is an array of type int16_t */
YYT_DATA32 = 0x04, /**< data is an array of type int32_t */
YYT_PTRANS = 0x08, /**< data is a list of indexes of entries
into the expanded `yy_transition'
array. See notes in manual. */
};
/* The serialized tables header. */
struct yytbl_hdr {
uint32_t th_magic; /**< Must be 0xF13C57B1 (comes from "Flex Table") */
uint32_t th_hsize; /**< Size of this header in bytes. */
uint32_t th_ssize; /**< Size of this dataset, in bytes, including header. */
uint16_t th_flags; /**< Currently unused, must be 0 */
char *th_version; /**< Flex version string. NUL terminated. */
char *th_name; /**< The name of this table set. NUL terminated. */
};
/** A single serialized table */
struct yytbl_data {
enum yytbl_id t_id; /**< table identifier */
uint16_t t_flags; /**< how to interpret this data */
uint32_t t_hilen; /**< num elements in highest dimension array */
uint32_t t_lolen; /**< num elements in lowest dimension array */
void *t_data; /**< table data */
};
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