Annotation of src/usr.bin/lex/tables_shared.h, Revision 1.2
1.2 ! tedu 1: /* $OpenBSD: tables_shared.h,v 1.1 2015/11/19 19:43:40 tedu Exp $ */
1.1 tedu 2:
3: #ifdef FLEX_SCANNER
4: /*
5: dnl tables_shared.h - tables serialization header
6: dnl
7: dnl Copyright (c) 1990 The Regents of the University of California.
8: dnl All rights reserved.
9: dnl
10: dnl This code is derived from software contributed to Berkeley by
11: dnl Vern Paxson.
12: dnl
13: dnl The United States Government has rights in this work pursuant
14: dnl to contract no. DE-AC03-76SF00098 between the United States
15: dnl Department of Energy and the University of California.
16: dnl
17: dnl This file is part of flex.
18: dnl
19: dnl Redistribution and use in source and binary forms, with or without
20: dnl modification, are permitted provided that the following conditions
21: dnl are met:
22: dnl
23: dnl 1. Redistributions of source code must retain the above copyright
24: dnl notice, this list of conditions and the following disclaimer.
25: dnl 2. Redistributions in binary form must reproduce the above copyright
26: dnl notice, this list of conditions and the following disclaimer in the
27: dnl documentation and/or other materials provided with the distribution.
28: dnl
29: dnl Neither the name of the University nor the names of its contributors
30: dnl may be used to endorse or promote products derived from this software
31: dnl without specific prior written permission.
32: dnl
33: dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
34: dnl IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
35: dnl WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
36: dnl PURPOSE.
37:
38: dnl
39: dnl This file is meant to be included in both the skeleton and the actual
40: dnl flex code (hence the name "_shared").
41: */
42: #ifndef yyskel_static
43: #define yyskel_static static
44: #endif
45: #else
46: #ifndef yyskel_static
47: #define yyskel_static
48: #endif
49: #endif
50:
51: /* Structures and prototypes for serializing flex tables. The
52: * binary format is documented in the manual.
53: *
54: * Design considerations:
55: *
56: * - The format allows many tables per file.
57: * - The tables can be streamed.
58: * - All data is stored in network byte order.
59: * - We do not hinder future unicode support.
60: * - We can lookup tables by name.
61: */
62:
63: /** Magic number for serialized format. */
64: #ifndef YYTBL_MAGIC
65: #define YYTBL_MAGIC 0xF13C57B1
66: #endif
67:
68: /** Calculate (0-7) = number bytes needed to pad n to next 64-bit boundary. */
69: #ifndef yypad64
70: #define yypad64(n) ((8-((n)%8))%8)
71: #endif
72:
73:
74: #ifndef YYTABLES_TYPES
75: #define YYTABLES_TYPES
76: /** Possible values for td_id field. Each one corresponds to a
77: * scanner table of the same name.
78: */
79: enum yytbl_id {
80: YYTD_ID_ACCEPT = 0x01, /**< 1-dim ints */
81: YYTD_ID_BASE = 0x02, /**< 1-dim ints */
82: YYTD_ID_CHK = 0x03, /**< 1-dim ints */
83: YYTD_ID_DEF = 0x04, /**< 1-dim ints */
84: YYTD_ID_EC = 0x05, /**< 1-dim ints */
85: YYTD_ID_META = 0x06, /**< 1-dim ints */
86: YYTD_ID_NUL_TRANS = 0x07, /**< 1-dim ints, maybe indices */
87: YYTD_ID_NXT = 0x08, /**< may be 2 dimensional ints */
88: YYTD_ID_RULE_CAN_MATCH_EOL = 0x09, /**< 1-dim ints */
89: YYTD_ID_START_STATE_LIST = 0x0A, /**< 1-dim indices into trans tbl */
90: YYTD_ID_TRANSITION = 0x0B, /**< structs */
91: YYTD_ID_ACCLIST = 0x0C /**< 1-dim ints */
92: };
93:
94: /** bit flags for t_flags field of struct yytbl_data */
95: enum yytbl_flags {
96: /* These first three are mutually exclusive */
97: YYTD_DATA8 = 0x01, /**< data is an array of type flex_int8_t */
98: YYTD_DATA16 = 0x02, /**< data is an array of type flex_int16_t */
99: YYTD_DATA32 = 0x04, /**< data is an array of type flex_int32_t */
100:
101: /* These two are mutually exclusive. */
102: YYTD_PTRANS = 0x08, /**< data is a list of indexes of entries
103: into the expanded `yy_transition'
104: array. See notes in manual. */
105: YYTD_STRUCT = 0x10 /**< data consists of yy_trans_info structs */
106: };
107:
108: /* The serialized tables header. */
109: struct yytbl_hdr {
110: flex_uint32_t th_magic; /**< Must be 0xF13C57B1 (comes from "Flex Table") */
111: flex_uint32_t th_hsize; /**< Size of this header in bytes. */
112: flex_uint32_t th_ssize; /**< Size of this dataset, in bytes, including header. */
113: flex_uint16_t th_flags; /**< Currently unused, must be 0 */
114: char *th_version; /**< Flex version string. NUL terminated. */
115: char *th_name; /**< The name of this table set. NUL terminated. */
116: };
117:
118: /** A single serialized table */
119: struct yytbl_data {
120: flex_uint16_t td_id; /**< enum yytbl_id table identifier */
121: flex_uint16_t td_flags; /**< how to interpret this data */
122: flex_uint32_t td_hilen; /**< num elements in highest dimension array */
123: flex_uint32_t td_lolen; /**< num elements in lowest dimension array */
124: void *td_data; /**< table data */
125: };
126: #endif
127:
128: /** Extract corresponding data size_t from td_flags */
129: #ifndef YYTDFLAGS2BYTES
130: #define YYTDFLAGS2BYTES(td_flags)\
131: (((td_flags) & YYTD_DATA8)\
132: ? sizeof(flex_int8_t)\
133: :(((td_flags) & YYTD_DATA16)\
134: ? sizeof(flex_int16_t)\
135: :sizeof(flex_int32_t)))
136: #endif
137:
138: #ifdef FLEX_SCANNER
139: %not-for-header
140: #endif
141: yyskel_static flex_int32_t yytbl_calc_total_len (const struct yytbl_data *tbl);
142: #ifdef FLEX_SCANNER
143: %ok-for-header
144: #endif
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