diff options
Diffstat (limited to 'src/tables_shared.h')
| -rw-r--r-- | src/tables_shared.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/src/tables_shared.h b/src/tables_shared.h new file mode 100644 index 0000000..bbf9910 --- /dev/null +++ b/src/tables_shared.h @@ -0,0 +1,144 @@ +#ifdef FLEX_SCANNER +/* +dnl tables_shared.h - tables serialization header +dnl +dnl Copyright (c) 1990 The Regents of the University of California. +dnl All rights reserved. +dnl +dnl This code is derived from software contributed to Berkeley by +dnl Vern Paxson. +dnl +dnl The United States Government has rights in this work pursuant +dnl to contract no. DE-AC03-76SF00098 between the United States +dnl Department of Energy and the University of California. +dnl +dnl This file is part of flex. +dnl +dnl Redistribution and use in source and binary forms, with or without +dnl modification, are permitted provided that the following conditions +dnl are met: +dnl +dnl 1. Redistributions of source code must retain the above copyright +dnl notice, this list of conditions and the following disclaimer. +dnl 2. Redistributions in binary form must reproduce the above copyright +dnl notice, this list of conditions and the following disclaimer in the +dnl documentation and/or other materials provided with the distribution. +dnl +dnl Neither the name of the University nor the names of its contributors +dnl may be used to endorse or promote products derived from this software +dnl without specific prior written permission. +dnl +dnl THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR +dnl IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED +dnl WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR +dnl PURPOSE. + +dnl +dnl This file is meant to be included in both the skeleton and the actual +dnl flex code (hence the name "_shared"). +*/ +#ifndef yyskel_static +#define yyskel_static static +#endif +#else +#ifndef yyskel_static +#define yyskel_static +#endif +#endif + +/* 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. */ +#ifndef YYTBL_MAGIC +#define YYTBL_MAGIC 0xF13C57B1 +#endif + +/** Calculate (0-7) = number bytes needed to pad n to next 64-bit boundary. */ +#ifndef yypad64 +#define yypad64(n) ((8-((n)%8))%8) +#endif + + +#ifndef YYTABLES_TYPES +#define YYTABLES_TYPES +/** Possible values for td_id field. Each one corresponds to a + * scanner table of the same name. + */ +enum yytbl_id { + YYTD_ID_ACCEPT = 0x01, /**< 1-dim ints */ + YYTD_ID_BASE = 0x02, /**< 1-dim ints */ + YYTD_ID_CHK = 0x03, /**< 1-dim ints */ + YYTD_ID_DEF = 0x04, /**< 1-dim ints */ + YYTD_ID_EC = 0x05, /**< 1-dim ints */ + YYTD_ID_META = 0x06, /**< 1-dim ints */ + YYTD_ID_NUL_TRANS = 0x07, /**< 1-dim ints, maybe indices */ + YYTD_ID_NXT = 0x08, /**< may be 2 dimensional ints */ + YYTD_ID_RULE_CAN_MATCH_EOL = 0x09, /**< 1-dim ints */ + YYTD_ID_START_STATE_LIST = 0x0A, /**< 1-dim indices into trans tbl */ + YYTD_ID_TRANSITION = 0x0B, /**< structs */ + YYTD_ID_ACCLIST = 0x0C /**< 1-dim ints */ +}; + +/** bit flags for t_flags field of struct yytbl_data */ +enum yytbl_flags { + /* These first three are mutually exclusive */ + YYTD_DATA8 = 0x01, /**< data is an array of type flex_int8_t */ + YYTD_DATA16 = 0x02, /**< data is an array of type flex_int16_t */ + YYTD_DATA32 = 0x04, /**< data is an array of type flex_int32_t */ + + /* These two are mutually exclusive. */ + YYTD_PTRANS = 0x08, /**< data is a list of indexes of entries + into the expanded `yy_transition' + array. See notes in manual. */ + YYTD_STRUCT = 0x10 /**< data consists of yy_trans_info structs */ +}; + +/* The serialized tables header. */ +struct yytbl_hdr { + flex_uint32_t th_magic; /**< Must be 0xF13C57B1 (comes from "Flex Table") */ + flex_uint32_t th_hsize; /**< Size of this header in bytes. */ + flex_uint32_t th_ssize; /**< Size of this dataset, in bytes, including header. */ + flex_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 { + flex_uint16_t td_id; /**< enum yytbl_id table identifier */ + flex_uint16_t td_flags; /**< how to interpret this data */ + flex_uint32_t td_hilen; /**< num elements in highest dimension array */ + flex_uint32_t td_lolen; /**< num elements in lowest dimension array */ + void *td_data; /**< table data */ +}; +#endif + +/** Extract corresponding data size_t from td_flags */ +#ifndef YYTDFLAGS2BYTES +#define YYTDFLAGS2BYTES(td_flags)\ + (((td_flags) & YYTD_DATA8)\ + ? sizeof(flex_int8_t)\ + :(((td_flags) & YYTD_DATA16)\ + ? sizeof(flex_int16_t)\ + :sizeof(flex_int32_t))) +#endif + +#ifdef FLEX_SCANNER +%not-for-header +#endif +yyskel_static flex_int32_t yytbl_calc_total_len (const struct yytbl_data *tbl); +#ifdef FLEX_SCANNER +%ok-for-header +#endif + +/* vim:set noexpandtab cindent tabstop=8 softtabstop=0 shiftwidth=8 textwidth=0: */ |