contrib/flex/tables_shared.h

   1 #ifdef FLEX_SCANNER
   2 /*
   3 dnl  tables_shared.h - tables serialization header
   4 dnl
   5 dnl  Copyright (c) 1990 The Regents of the University of California.
   6 dnl  All rights reserved.
   7 dnl
   8 dnl  This code is derived from software contributed to Berkeley by
   9 dnl  Vern Paxson.
  10 dnl
  11 dnl  The United States Government has rights in this work pursuant
  12 dnl  to contract no. DE-AC03-76SF00098 between the United States
  13 dnl  Department of Energy and the University of California.
  14 dnl
  15 dnl  This file is part of flex.
  16 dnl
  17 dnl  Redistribution and use in source and binary forms, with or without
  18 dnl  modification, are permitted provided that the following conditions
  19 dnl  are met:
  20 dnl
  21 dnl  1. Redistributions of source code must retain the above copyright
  22 dnl     notice, this list of conditions and the following disclaimer.
  23 dnl  2. Redistributions in binary form must reproduce the above copyright
  24 dnl     notice, this list of conditions and the following disclaimer in the
  25 dnl     documentation and/or other materials provided with the distribution.
  26 dnl
  27 dnl  Neither the name of the University nor the names of its contributors
  28 dnl  may be used to endorse or promote products derived from this software
  29 dnl  without specific prior written permission.
  30 dnl
  31 dnl  THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  32 dnl  IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  33 dnl  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  34 dnl  PURPOSE.
  35 \f
  36 dnl
  37 dnl  This file is meant to be included in both the skeleton and the actual
  38 dnl  flex code (hence the name "_shared").
  39 */
  40 #ifndef yyskel_static
  41 #define yyskel_static static
  42 #endif
  43 #else
  44 #ifndef yyskel_static
  45 #define yyskel_static
  46 #endif
  47 #endif
  48
  49 /* Structures and prototypes for serializing flex tables.  The
  50  * binary format is documented in the manual.
  51  *
  52  * Design considerations:
  53  *
  54  *  -  The format allows many tables per file.
  55  *  -  The tables can be streamed.
  56  *  -  All data is stored in network byte order.
  57  *  -  We do not hinder future unicode support.
  58  *  -  We can lookup tables by name.
  59  */
  60
  61 /** Magic number for serialized format. */
  62 #ifndef YYTBL_MAGIC
  63 #define YYTBL_MAGIC 0xF13C57B1
  64 #endif
  65
  66 /** Calculate (0-7) = number bytes needed to pad n to next 64-bit boundary. */
  67 #ifndef yypad64
  68 #define yypad64(n) ((8-((n)%8))%8)
  69 #endif
  70
  71
  72 #ifndef YYTABLES_TYPES
  73 #define YYTABLES_TYPES
  74 /** Possible values for td_id field. Each one corresponds to a
  75  *  scanner table of the same name.
  76  */
  77 enum yytbl_id {
  78         YYTD_ID_ACCEPT = 0x01,          /**< 1-dim ints */
  79         YYTD_ID_BASE = 0x02,            /**< 1-dim ints */
  80         YYTD_ID_CHK = 0x03,             /**< 1-dim ints */
  81         YYTD_ID_DEF = 0x04,             /**< 1-dim ints */
  82         YYTD_ID_EC = 0x05,              /**< 1-dim ints */
  83         YYTD_ID_META = 0x06,            /**< 1-dim ints */
  84         YYTD_ID_NUL_TRANS = 0x07,       /**< 1-dim ints, maybe indices */
  85         YYTD_ID_NXT = 0x08,             /**< may be 2 dimensional ints */
  86         YYTD_ID_RULE_CAN_MATCH_EOL = 0x09, /**< 1-dim ints */
  87         YYTD_ID_START_STATE_LIST = 0x0A,        /**< 1-dim indices into trans tbl  */
  88         YYTD_ID_TRANSITION = 0x0B,      /**< structs */
  89         YYTD_ID_ACCLIST = 0x0C          /**< 1-dim ints */
  90 };
  91
  92 /** bit flags for t_flags field of struct yytbl_data */
  93 enum yytbl_flags {
  94         /* These first three are mutually exclusive */
  95         YYTD_DATA8 = 0x01,   /**< data is an array of type flex_int8_t */
  96         YYTD_DATA16 = 0x02,  /**< data is an array of type flex_int16_t */
  97         YYTD_DATA32 = 0x04,  /**< data is an array of type flex_int32_t */
  98
  99         /* These two are mutually exclusive. */
 100         YYTD_PTRANS = 0x08,  /**< data is a list of indexes of entries
 101                                  into the expanded `yy_transition'
 102                                  array. See notes in manual. */
 103         YYTD_STRUCT = 0x10  /**< data consists of yy_trans_info structs */
 104 };
 105
 106 /* The serialized tables header. */
 107 struct yytbl_hdr {
 108         flex_uint32_t th_magic;  /**< Must be 0xF13C57B1 (comes from "Flex Table") */
 109         flex_uint32_t th_hsize;  /**< Size of this header in bytes. */
 110         flex_uint32_t th_ssize;  /**< Size of this dataset, in bytes, including header. */
 111         flex_uint16_t th_flags;  /**< Currently unused, must be 0 */
 112         char   *th_version; /**< Flex version string. NUL terminated. */
 113         char   *th_name;    /**< The name of this table set. NUL terminated. */
 114 };
 115
 116 /** A single serialized table */
 117 struct yytbl_data {
 118         flex_uint16_t td_id;      /**< enum yytbl_id table identifier */
 119         flex_uint16_t td_flags;   /**< how to interpret this data */
 120         flex_uint32_t td_hilen;   /**< num elements in highest dimension array */
 121         flex_uint32_t td_lolen;   /**< num elements in lowest dimension array */
 122         void   *td_data;     /**< table data */
 123 };
 124 #endif
 125
 126 /** Extract corresponding data size_t from td_flags */
 127 #ifndef YYTDFLAGS2BYTES
 128 #define YYTDFLAGS2BYTES(td_flags)\
 129         (((td_flags) & YYTD_DATA8)\
 130             ? sizeof(flex_int8_t)\
 131             :(((td_flags) & YYTD_DATA16)\
 132                 ? sizeof(flex_int16_t)\
 133                 :sizeof(flex_int32_t)))
 134 #endif
 135
 136 #ifdef FLEX_SCANNER
 137 %not-for-header
 138 #endif
 139 yyskel_static flex_int32_t yytbl_calc_total_len (const struct yytbl_data *tbl);
 140 #ifdef FLEX_SCANNER
 141 %ok-for-header
 142 #endif
 143
 144 /* vim:set noexpandtab cindent tabstop=8 softtabstop=0 shiftwidth=8 textwidth=0: */