346 lines
8.8 KiB
C
346 lines
8.8 KiB
C
/* $NetBSD: citrus_mapper_std.c,v 1.3 2003/07/12 15:39:20 tshiozak Exp $ */
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/*-
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* Copyright (c)2003 Citrus Project,
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* All rights reserved.
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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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: citrus_mapper_std.c,v 1.3 2003/07/12 15:39:20 tshiozak Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/endian.h>
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#include <sys/queue.h>
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#include "citrus_namespace.h"
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#include "citrus_types.h"
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#include "citrus_bcs.h"
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#include "citrus_region.h"
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#include "citrus_mmap.h"
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#include "citrus_module.h"
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#include "citrus_hash.h"
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#include "citrus_mapper.h"
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#include "citrus_db.h"
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#include "citrus_db_hash.h"
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#include "citrus_mapper_std.h"
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#include "citrus_mapper_std_file.h"
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/* ---------------------------------------------------------------------- */
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_CITRUS_MAPPER_DECLS(mapper_std);
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_CITRUS_MAPPER_DEF_OPS(mapper_std);
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/* ---------------------------------------------------------------------- */
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int
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_citrus_mapper_std_mapper_getops(struct _citrus_mapper_ops *ops, size_t lenops,
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u_int32_t expected_version)
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{
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if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops))
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return (EINVAL);
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memcpy(ops, &_citrus_mapper_std_mapper_ops,
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sizeof(_citrus_mapper_std_mapper_ops));
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return (0);
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}
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/* ---------------------------------------------------------------------- */
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static int
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/*ARGSUSED*/
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rowcol_convert(struct _citrus_mapper_std * __restrict ms,
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_index_t * __restrict dst, _index_t src,
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void * __restrict ps)
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{
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struct _citrus_mapper_std_rowcol *rc = &ms->ms_rowcol;
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_index_t row, col, idx;
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u_int32_t conv;
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if (rc->rc_src_col_bits == 32) {
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row = 0;
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col = src;
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} else {
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row = src >> rc->rc_src_col_bits;
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col = src & ((1U<<rc->rc_src_col_bits)-1);
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}
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if (row < rc->rc_src_row_begin || row > rc->rc_src_row_end ||
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col < rc->rc_src_col_begin || col > rc->rc_src_col_end) {
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switch (rc->rc_oob_mode) {
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case _CITRUS_MAPPER_STD_OOB_NONIDENTICAL:
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*dst = rc->rc_dst_invalid;
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return _MAPPER_CONVERT_NONIDENTICAL;
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case _CITRUS_MAPPER_STD_OOB_ILSEQ:
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return _MAPPER_CONVERT_ILSEQ;
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default:
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return _MAPPER_CONVERT_FATAL;
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}
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}
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idx =
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(row - rc->rc_src_row_begin)*rc->rc_src_col_width +
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(col - rc->rc_src_col_begin);
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switch (rc->rc_dst_unit_bits) {
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case 8:
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conv = _region_peek8(&rc->rc_table, idx);
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break;
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case 16:
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conv = be16toh(_region_peek16(&rc->rc_table, idx*2));
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break;
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case 32:
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conv = be32toh(_region_peek32(&rc->rc_table, idx*4));
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break;
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}
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if (conv == rc->rc_dst_invalid) {
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*dst = rc->rc_dst_invalid;
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return _MAPPER_CONVERT_NONIDENTICAL;
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}
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if (conv == rc->rc_dst_ilseq)
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return _MAPPER_CONVERT_ILSEQ;
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*dst = conv;
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return _MAPPER_CONVERT_SUCCESS;
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}
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static int
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rowcol_init(struct _citrus_mapper_std *ms)
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{
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int ret;
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struct _citrus_mapper_std_rowcol *rc = &ms->ms_rowcol;
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const struct _citrus_mapper_std_rowcol_info_x *rcx;
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const struct _citrus_mapper_std_rowcol_ext_ilseq_info_x *eix;
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struct _region r;
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u_int64_t table_size;
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ms->ms_convert = &rowcol_convert;
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ms->ms_uninit = NULL;
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/* get table region */
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ret = _db_lookup_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_TABLE,
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&rc->rc_table, NULL);
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if (ret) {
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if (ret==ENOENT)
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ret = EFTYPE;
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return ret;
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}
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/* get table information */
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ret = _db_lookup_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_INFO, &r, NULL);
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if (ret) {
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if (ret==ENOENT)
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ret = EFTYPE;
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return ret;
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}
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if (_region_size(&r) < sizeof(*rcx))
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return EFTYPE;
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rcx = _region_head(&r);
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/* convert */
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#define CONV_ROWCOL(rc, rcx, elem) \
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do { \
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(rc)->rc_##elem = be32toh((rcx)->rcx_##elem); \
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} while (/*CONSTCOND*/0)
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CONV_ROWCOL(rc, rcx, src_col_bits);
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CONV_ROWCOL(rc, rcx, dst_invalid);
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CONV_ROWCOL(rc, rcx, src_row_begin);
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CONV_ROWCOL(rc, rcx, src_row_end);
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CONV_ROWCOL(rc, rcx, src_col_begin);
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CONV_ROWCOL(rc, rcx, src_col_end);
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CONV_ROWCOL(rc, rcx, dst_unit_bits);
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/* ilseq extension */
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rc->rc_oob_mode = _CITRUS_MAPPER_STD_OOB_NONIDENTICAL;
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rc->rc_dst_ilseq = rc->rc_dst_invalid;
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ret = _db_lookup_by_s(ms->ms_db,
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_CITRUS_MAPPER_STD_SYM_ROWCOL_EXT_ILSEQ,
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&r, NULL);
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if (ret && ret != ENOENT)
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return ret;
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if (_region_size(&r) < sizeof(*eix))
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return EFTYPE;
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if (ret == 0) {
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eix = _region_head(&r);
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rc->rc_oob_mode = be32toh(eix->eix_oob_mode);
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rc->rc_dst_ilseq = be32toh(eix->eix_dst_ilseq);
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}
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rc->rc_src_col_width = rc->rc_src_col_end - rc->rc_src_col_begin +1;
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/* validation checks */
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if (rc->rc_src_col_end < rc->rc_src_col_begin ||
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rc->rc_src_row_end < rc->rc_src_row_begin ||
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!(rc->rc_dst_unit_bits==8 || rc->rc_dst_unit_bits==16 ||
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rc->rc_dst_unit_bits==32) ||
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!(rc->rc_src_col_bits >= 0 && rc->rc_src_col_bits <= 32))
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return EFTYPE;
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/* calcurate expected table size */
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table_size = rc->rc_src_row_end - rc->rc_src_row_begin + 1;
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table_size *= rc->rc_src_col_width;
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table_size *= rc->rc_dst_unit_bits/8;
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if (table_size > UINT32_MAX ||
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_region_size(&rc->rc_table) < table_size)
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return EFTYPE;
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return 0;
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}
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typedef int (*initfunc_t)(struct _citrus_mapper_std *);
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static struct {
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const char *t_name;
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initfunc_t t_init;
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} types[] = {
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{ _CITRUS_MAPPER_STD_TYPE_ROWCOL, &rowcol_init },
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};
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#define NUM_OF_TYPES ((int)(sizeof(types)/sizeof(types[0])))
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static int
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/*ARGSUSED*/
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_citrus_mapper_std_mapper_init(struct _citrus_mapper_area *__restrict ma,
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struct _citrus_mapper * __restrict cm,
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const char * __restrict curdir,
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const void * __restrict var, size_t lenvar,
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struct _citrus_mapper_traits * __restrict mt,
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size_t lenmt)
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{
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char path[PATH_MAX];
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const char *type;
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int ret, id;
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struct _citrus_mapper_std *ms;
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/* set traits */
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if (lenmt<sizeof(*mt)) {
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ret = EINVAL;
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goto err0;
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}
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mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */
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mt->mt_state_size = 0; /* stateless */
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/* alloc mapper std structure */
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ms = malloc(sizeof(*ms));
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if (ms==NULL) {
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ret = errno;
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goto err0;
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}
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/* open mapper file */
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snprintf(path, sizeof(path),
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"%s/%.*s", curdir, (int)lenvar, (const char *)var);
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ret = _map_file(&ms->ms_file, path);
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if (ret)
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goto err1;
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ret = _db_open(&ms->ms_db, &ms->ms_file, _CITRUS_MAPPER_STD_MAGIC,
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&_db_hash_std, NULL);
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if (ret)
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goto err2;
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/* get mapper type */
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ret = _db_lookupstr_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_TYPE,
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&type, NULL);
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if (ret) {
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if (ret==ENOENT)
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ret = EFTYPE;
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goto err3;
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}
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for (id=0; id<NUM_OF_TYPES; id++)
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if (_bcs_strcasecmp(type, types[id].t_name) == 0)
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break;
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if (id == NUM_OF_TYPES)
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goto err3;
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/* init the per-type structure */
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ret = (*types[id].t_init)(ms);
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if (ret)
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goto err3;
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cm->cm_closure = ms;
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return 0;
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err3:
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_db_close(ms->ms_db);
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err2:
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_unmap_file(&ms->ms_file);
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err1:
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free(ms);
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err0:
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return ret;
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}
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static void
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/*ARGSUSED*/
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_citrus_mapper_std_mapper_uninit(struct _citrus_mapper *cm)
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{
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struct _citrus_mapper_std *ms;
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_DIAGASSERT(cm!=NULL & cm->cm_closure!=NULL);
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ms = cm->cm_closure;
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if (ms->ms_uninit)
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(*ms->ms_uninit)(ms);
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_db_close(ms->ms_db);
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_unmap_file(&ms->ms_file);
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free(ms);
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}
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static void
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/*ARGSUSED*/
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_citrus_mapper_std_mapper_init_state(struct _citrus_mapper * __restrict cm,
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void * __restrict ps)
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{
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}
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static int
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/*ARGSUSED*/
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_citrus_mapper_std_mapper_convert(struct _citrus_mapper * __restrict cm,
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_index_t * __restrict dst, _index_t src,
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void * __restrict ps)
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{
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struct _citrus_mapper_std *ms;
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_DIAGASSERT(cm!=NULL && cm->cm_closure!=NULL);
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ms = cm->cm_closure;
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_DIAGASSERT(ms->ms_convert != NULL);
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return (*ms->ms_convert)(ms, dst, src, ps);
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}
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