159 lines
6.2 KiB
C
159 lines
6.2 KiB
C
/*
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* Copyright (c) 2003-2004, Artem B. Bityuckiy
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef __CCS_H__
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#define __CCS_H__
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#include <_ansi.h>
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#include <sys/types.h>
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#include <sys/param.h>
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/*
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* Size-optimized tables will be linked instead of speed-optimized if
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* TABLE_USE_SIZE_OPTIMISATION macro is defined.
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*/
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#if defined (PREFER_SIZE_OVER_SPEED) || defined (__OPTIMIZE_SIZE__)
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# define TABLE_USE_SIZE_OPTIMIZATION
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#endif
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/* Invalid code marker */
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#define INVALC 0xFFFF
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/* Invalid block marker - marks empty blocks in speed-optimized tables */
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#define INVBLK 0xFFFF
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/* Lost code marker - marks codes that was lost during CCS->UCS mapping */
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#define LOST_C DEFAULT_CHARACTER
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/*
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* Table parameters values.
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*/
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/* Table version 1.0 identifier */
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#define TABLE_VERSION_1 1
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/* 8 and 16 bit tables identifiers */
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#define TABLE_8BIT 8
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#define TABLE_16BIT 16
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/* Size-optimized and speed-optimized tables identifiers */
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#define TABLE_SIZE_OPTIMIZED 1
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#define TABLE_SPEED_OPTIMIZED 2
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/* Built-in/external tables identifiers */
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#define TABLE_BUILTIN 1
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#define TABLE_EXTERNAL 2
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/*
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* Binary table fields.
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*/
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/* "No table" marker */
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#define EXTTABLE_NO_TABLE 0
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/* Version offset (2 bytes) */
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#define EXTTABLE_VERSION_OFF 0
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/* Bits number offset (2 bytes) */
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#define EXTTABLE_BITS_OFF 2
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/* CCS name length offset (2 bytes) */
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#define EXTTABLE_CCSNAME_LEN_OFF 4
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/* CCS name offset (expanded to even bytes number)*/
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#define EXTTABLE_CCSNAME_OFF 8
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/* Header length (minus CCS name) */
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#define EXTTABLE_HEADER_LEN (EXTTABLE_CCSNAME_OFF + 16*4)
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/* Tables and lengths offsets minus CCS name length (4 bytes) */
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#define EXTTABLE_FROM_SPEED_BE_OFF (EXTTABLE_CCSNAME_OFF + 0)
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#define EXTTABLE_FROM_SPEED_BE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 4)
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#define EXTTABLE_FROM_SPEED_LE_OFF (EXTTABLE_CCSNAME_OFF + 8)
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#define EXTTABLE_FROM_SPEED_LE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 12)
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#define EXTTABLE_FROM_SIZE_BE_OFF (EXTTABLE_CCSNAME_OFF + 16)
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#define EXTTABLE_FROM_SIZE_BE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 20)
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#define EXTTABLE_FROM_SIZE_LE_OFF (EXTTABLE_CCSNAME_OFF + 24)
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#define EXTTABLE_FROM_SIZE_LE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 28)
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#define EXTTABLE_TO_SPEED_BE_OFF (EXTTABLE_CCSNAME_OFF + 32)
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#define EXTTABLE_TO_SPEED_BE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 36)
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#define EXTTABLE_TO_SPEED_LE_OFF (EXTTABLE_CCSNAME_OFF + 40)
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#define EXTTABLE_TO_SPEED_LE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 44)
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#define EXTTABLE_TO_SIZE_BE_OFF (EXTTABLE_CCSNAME_OFF + 48)
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#define EXTTABLE_TO_SIZE_BE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 52)
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#define EXTTABLE_TO_SIZE_LE_OFF (EXTTABLE_CCSNAME_OFF + 56)
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#define EXTTABLE_TO_SIZE_LE_LEN_OFF (EXTTABLE_CCSNAME_OFF + 60)
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/* Endian-independent offsets */
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#if (BYTE_ORDER == LITTLE_ENDIAN)
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# define EXTTABLE_FROM_SPEED_OFF EXTTABLE_FROM_SPEED_LE_OFF
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# define EXTTABLE_FROM_SIZE_OFF EXTTABLE_FROM_SIZE_LE_OFF
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# define EXTTABLE_TO_SPEED_OFF EXTTABLE_TO_SPEED_LE_OFF
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# define EXTTABLE_TO_SIZE_OFF EXTTABLE_TO_SIZE_LE_OFF
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# define EXTTABLE_FROM_SPEED_LEN_OFF EXTTABLE_FROM_SPEED_LE_LEN_OFF
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# define EXTTABLE_FROM_SIZE_LEN_OFF EXTTABLE_FROM_SIZE_LE_LEN_OFF
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# define EXTTABLE_TO_SPEED_LEN_OFF EXTTABLE_TO_SPEED_LE_LEN_OFF
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# define EXTTABLE_TO_SIZE_LEN_OFF EXTTABLE_TO_SIZE_LE_LEN_OFF
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#elif (BYTE_ORDER == BIG_ENDIAN)
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# define EXTTABLE_FROM_SPEED_OFF EXTTABLE_FROM_SPEED_BE_OFF
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# define EXTTABLE_FROM_SIZE_OFF EXTTABLE_FROM_SIZE_BE_OFF
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# define EXTTABLE_TO_SPEED_OFF EXTTABLE_TO_SPEED_BE_OFF
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# define EXTTABLE_TO_SIZE_OFF EXTTABLE_TO_SIZE_BE_OFF
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# define EXTTABLE_FROM_SPEED_LEN_OFF EXTTABLE_FROM_SPEED_BE_LEN_OFF
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# define EXTTABLE_FROM_SIZE_LEN_OFF EXTTABLE_FROM_SIZE_BE_LEN_OFF
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# define EXTTABLE_TO_SPEED_LEN_OFF EXTTABLE_TO_SPEED_BE_LEN_OFF
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# define EXTTABLE_TO_SIZE_LEN_OFF EXTTABLE_TO_SIZE_BE_LEN_OFF
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#endif
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/*
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* Size-optimized suitable fields indexes.
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*/
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/* Ranges number array index */
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#define RANGES_NUM_INDEX 0
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/* Un-ranged codes number array index */
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#define UNRANGED_NUM_INDEX 1
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/* First un-ranged pair index array index */
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#define FIRST_UNRANGED_INDEX_INDEX 2
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/* First range array index */
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#define FIRST_RANGE_INDEX 3
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/*
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* Builtin CCS table description structure.
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*/
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typedef struct
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{
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__uint16_t ver; /* Table version */
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const char *name; /* CCS name */
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__uint16_t bits; /* CCS's bits number */
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int from_ucs_type; /* UCS -> CCS table optimization type */
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const __uint16_t *from_ucs; /* UCS -> CCS table */
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int to_ucs_type; /* CCS -> UCS table optimization type */
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const __uint16_t *to_ucs; /* CCS -> UCS table */
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} iconv_ccs_t;
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/*
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* CCS table descriptor.
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*/
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typedef struct
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{
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int bits; /* CCS's bits number */
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int type; /* Table type (builtin/external) */
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int optimization; /* Table optimization type (speed/size) */
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const __uint16_t *tbl; /* Table's data */
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} iconv_ccs_desc_t;
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/* Array containing all built-in CCS tables */
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extern const iconv_ccs_t *
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_iconv_ccs[];
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#endif /* __CCS_H__ */
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