minix/lib/libc/citrus/modules/citrus_mapper_std.c

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/* $NetBSD: citrus_mapper_std.c,v 1.10 2011/11/19 18:48:39 tnozaki Exp $ */
/*-
* Copyright (c)2003, 2006 Citrus Project,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_mapper_std.c,v 1.10 2011/11/19 18:48:39 tnozaki Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <machine/endian.h>
#include <sys/queue.h>
#include "citrus_namespace.h"
#include "citrus_types.h"
#include "citrus_bcs.h"
#include "citrus_region.h"
#include "citrus_mmap.h"
#include "citrus_module.h"
#include "citrus_hash.h"
#include "citrus_mapper.h"
#include "citrus_db.h"
#include "citrus_db_hash.h"
#include "citrus_mapper_std.h"
#include "citrus_mapper_std_file.h"
/* ---------------------------------------------------------------------- */
_CITRUS_MAPPER_DECLS(mapper_std);
_CITRUS_MAPPER_DEF_OPS(mapper_std);
/* ---------------------------------------------------------------------- */
int
_citrus_mapper_std_mapper_getops(struct _citrus_mapper_ops *ops, size_t lenops,
u_int32_t expected_version)
{
if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops))
return (EINVAL);
memcpy(ops, &_citrus_mapper_std_mapper_ops,
sizeof(_citrus_mapper_std_mapper_ops));
return (0);
}
/* ---------------------------------------------------------------------- */
static int
/*ARGSUSED*/
rowcol_convert(struct _citrus_mapper_std * __restrict ms,
_index_t * __restrict dst, _index_t src,
void * __restrict ps)
{
struct _citrus_mapper_std_rowcol *rc;
size_t i;
struct _citrus_mapper_std_linear_zone *lz;
_index_t n, idx = 0;
u_int32_t conv;
_DIAGASSERT(ms != NULL);
_DIAGASSERT(dst != NULL);
/* ps may be unused */
rc = &ms->ms_rowcol;
for (i = rc->rc_src_rowcol_len * rc->rc_src_rowcol_bits,
lz = &rc->rc_src_rowcol[0]; i > 0; ++lz) {
i -= rc->rc_src_rowcol_bits;
n = (src >> i) & rc->rc_src_rowcol_mask;
if (n < lz->begin || n > lz->end) {
switch (rc->rc_oob_mode) {
case _CITRUS_MAPPER_STD_OOB_NONIDENTICAL:
*dst = rc->rc_dst_invalid;
return _MAPPER_CONVERT_NONIDENTICAL;
case _CITRUS_MAPPER_STD_OOB_ILSEQ:
return _MAPPER_CONVERT_ILSEQ;
default:
return _MAPPER_CONVERT_FATAL;
}
}
idx = idx * lz->width + n - lz->begin;
}
switch (rc->rc_dst_unit_bits) {
case 8:
conv = _region_peek8(&rc->rc_table, idx);
break;
case 16:
conv = be16toh(_region_peek16(&rc->rc_table, idx*2));
break;
case 32:
conv = be32toh(_region_peek32(&rc->rc_table, idx*4));
break;
default:
return _MAPPER_CONVERT_FATAL;
}
if (conv == rc->rc_dst_invalid) {
*dst = rc->rc_dst_invalid;
return _MAPPER_CONVERT_NONIDENTICAL;
}
if (conv == rc->rc_dst_ilseq)
return _MAPPER_CONVERT_ILSEQ;
*dst = conv;
return _MAPPER_CONVERT_SUCCESS;
}
static __inline int
set_linear_zone(struct _citrus_mapper_std_linear_zone *lz,
u_int32_t begin, u_int32_t end)
{
_DIAGASSERT(lz != NULL);
if (begin > end)
return EFTYPE;
lz->begin = begin;
lz->end = end;
lz->width= end - begin + 1;
return 0;
}
static __inline int
rowcol_parse_variable_compat(struct _citrus_mapper_std_rowcol *rc,
struct _region *r)
{
const struct _citrus_mapper_std_rowcol_info_compat_x *rcx;
struct _citrus_mapper_std_linear_zone *lz;
u_int32_t m, n;
int ret;
_DIAGASSERT(rc != NULL);
_DIAGASSERT(r != NULL && _region_size(r) == sizeof(*rcx));
rcx = _region_head(r);
rc->rc_dst_invalid = be32toh(rcx->rcx_dst_invalid);
rc->rc_dst_unit_bits = be32toh(rcx->rcx_dst_unit_bits);
m = be32toh(rcx->rcx_src_col_bits);
n = 1 << (m - 1);
n |= n - 1;
rc->rc_src_rowcol_bits = m;
rc->rc_src_rowcol_mask = n;
rc->rc_src_rowcol = malloc(2 *
sizeof(*rc->rc_src_rowcol));
if (rc->rc_src_rowcol == NULL)
return ENOMEM;
lz = rc->rc_src_rowcol;
rc->rc_src_rowcol_len = 1;
m = be32toh(rcx->rcx_src_row_begin);
n = be32toh(rcx->rcx_src_row_end);
if (m + n > 0) {
ret = set_linear_zone(lz, m, n);
if (ret != 0) {
free(rc->rc_src_rowcol);
rc->rc_src_rowcol = NULL;
return ret;
}
++rc->rc_src_rowcol_len, ++lz;
}
m = be32toh(rcx->rcx_src_col_begin);
n = be32toh(rcx->rcx_src_col_end);
return set_linear_zone(lz, m, n);
}
static __inline int
rowcol_parse_variable(struct _citrus_mapper_std_rowcol *rc,
struct _region *r)
{
const struct _citrus_mapper_std_rowcol_info_x *rcx;
struct _citrus_mapper_std_linear_zone *lz;
u_int32_t m, n;
size_t i;
int ret;
_DIAGASSERT(rc != NULL);
_DIAGASSERT(r != NULL && _region_size(r) == sizeof(*rcx));
rcx = _region_head(r);
rc->rc_dst_invalid = be32toh(rcx->rcx_dst_invalid);
rc->rc_dst_unit_bits = be32toh(rcx->rcx_dst_unit_bits);
m = be32toh(rcx->rcx_src_rowcol_bits);
n = 1 << (m - 1);
n |= n - 1;
rc->rc_src_rowcol_bits = m;
rc->rc_src_rowcol_mask = n;
rc->rc_src_rowcol_len = be32toh(rcx->rcx_src_rowcol_len);
if (rc->rc_src_rowcol_len > _CITRUS_MAPPER_STD_ROWCOL_MAX)
return EFTYPE;
rc->rc_src_rowcol = malloc(rc->rc_src_rowcol_len *
sizeof(*rc->rc_src_rowcol));
if (rc->rc_src_rowcol == NULL)
return ENOMEM;
for (i = 0, lz = rc->rc_src_rowcol;
i < rc->rc_src_rowcol_len; ++i, ++lz) {
m = be32toh(rcx->rcx_src_rowcol[i].begin),
n = be32toh(rcx->rcx_src_rowcol[i].end);
ret = set_linear_zone(lz, m, n);
if (ret != 0) {
free(rc->rc_src_rowcol);
rc->rc_src_rowcol = NULL;
return ret;
}
}
return 0;
}
static void
rowcol_uninit(struct _citrus_mapper_std *ms)
{
struct _citrus_mapper_std_rowcol *rc;
_DIAGASSERT(ms != NULL);
rc = &ms->ms_rowcol;
free(rc->rc_src_rowcol);
}
static int
rowcol_init(struct _citrus_mapper_std *ms)
{
int ret;
struct _citrus_mapper_std_rowcol *rc;
const struct _citrus_mapper_std_rowcol_ext_ilseq_info_x *eix;
struct _region r;
u_int64_t table_size;
size_t i;
struct _citrus_mapper_std_linear_zone *lz;
_DIAGASSERT(ms != NULL);
ms->ms_convert = &rowcol_convert;
ms->ms_uninit = &rowcol_uninit;
rc = &ms->ms_rowcol;
/* get table region */
ret = _db_lookup_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_TABLE,
&rc->rc_table, NULL);
if (ret) {
if (ret==ENOENT)
ret = EFTYPE;
return ret;
}
/* get table information */
ret = _db_lookup_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_INFO, &r, NULL);
if (ret) {
if (ret==ENOENT)
ret = EFTYPE;
return ret;
}
switch (_region_size(&r)) {
case _CITRUS_MAPPER_STD_ROWCOL_INFO_COMPAT_SIZE:
ret = rowcol_parse_variable_compat(rc, &r);
break;
case _CITRUS_MAPPER_STD_ROWCOL_INFO_SIZE:
ret = rowcol_parse_variable(rc, &r);
break;
default:
return EFTYPE;
}
if (ret != 0)
return ret;
/* sanity check */
switch (rc->rc_src_rowcol_bits) {
case 8: case 16: case 32:
if (rc->rc_src_rowcol_len <= 32 / rc->rc_src_rowcol_bits)
break;
/*FALLTHROUGH*/
default:
return EFTYPE;
}
/* ilseq extension */
rc->rc_oob_mode = _CITRUS_MAPPER_STD_OOB_NONIDENTICAL;
rc->rc_dst_ilseq = rc->rc_dst_invalid;
ret = _db_lookup_by_s(ms->ms_db,
_CITRUS_MAPPER_STD_SYM_ROWCOL_EXT_ILSEQ,
&r, NULL);
if (ret && ret != ENOENT)
return ret;
if (_region_size(&r) < sizeof(*eix))
return EFTYPE;
if (ret == 0) {
eix = _region_head(&r);
rc->rc_oob_mode = be32toh(eix->eix_oob_mode);
rc->rc_dst_ilseq = be32toh(eix->eix_dst_ilseq);
}
/* calcurate expected table size */
i = rc->rc_src_rowcol_len;
lz = &rc->rc_src_rowcol[--i];
table_size = lz->width;
while (i > 0) {
lz = &rc->rc_src_rowcol[--i];
table_size *= lz->width;
}
table_size *= rc->rc_dst_unit_bits/8;
if (table_size > UINT32_MAX ||
_region_size(&rc->rc_table) < table_size)
return EFTYPE;
return 0;
}
typedef int (*initfunc_t)(struct _citrus_mapper_std *);
static const struct {
const char *t_name;
initfunc_t t_init;
} types[] = {
{ _CITRUS_MAPPER_STD_TYPE_ROWCOL, &rowcol_init },
};
#define NUM_OF_TYPES ((int)(sizeof(types)/sizeof(types[0])))
static int
/*ARGSUSED*/
_citrus_mapper_std_mapper_init(struct _citrus_mapper_area *__restrict ma,
struct _citrus_mapper * __restrict cm,
const char * __restrict curdir,
const void * __restrict var, size_t lenvar,
struct _citrus_mapper_traits * __restrict mt,
size_t lenmt)
{
char path[PATH_MAX];
const char *type;
int ret, id;
struct _citrus_mapper_std *ms;
/* set traits */
if (lenmt<sizeof(*mt)) {
ret = EINVAL;
goto err0;
}
mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */
mt->mt_state_size = 0; /* stateless */
/* alloc mapper std structure */
ms = malloc(sizeof(*ms));
if (ms==NULL) {
ret = errno;
goto err0;
}
/* open mapper file */
snprintf(path, sizeof(path),
"%s/%.*s", curdir, (int)lenvar, (const char *)var);
ret = _map_file(&ms->ms_file, path);
if (ret)
goto err1;
ret = _db_open(&ms->ms_db, &ms->ms_file, _CITRUS_MAPPER_STD_MAGIC,
&_db_hash_std, NULL);
if (ret)
goto err2;
/* get mapper type */
ret = _db_lookupstr_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_TYPE,
&type, NULL);
if (ret) {
if (ret==ENOENT)
ret = EFTYPE;
goto err3;
}
for (id=0; id<NUM_OF_TYPES; id++)
if (_bcs_strcasecmp(type, types[id].t_name) == 0)
break;
if (id == NUM_OF_TYPES)
goto err3;
/* init the per-type structure */
ret = (*types[id].t_init)(ms);
if (ret)
goto err3;
cm->cm_closure = ms;
return 0;
err3:
_db_close(ms->ms_db);
err2:
_unmap_file(&ms->ms_file);
err1:
free(ms);
err0:
return ret;
}
static void
/*ARGSUSED*/
_citrus_mapper_std_mapper_uninit(struct _citrus_mapper *cm)
{
struct _citrus_mapper_std *ms;
_DIAGASSERT(cm!=NULL && cm->cm_closure!=NULL);
ms = cm->cm_closure;
if (ms->ms_uninit)
(*ms->ms_uninit)(ms);
_db_close(ms->ms_db);
_unmap_file(&ms->ms_file);
free(ms);
}
static void
/*ARGSUSED*/
_citrus_mapper_std_mapper_init_state(struct _citrus_mapper * __restrict cm,
void * __restrict ps)
{
}
static int
/*ARGSUSED*/
_citrus_mapper_std_mapper_convert(struct _citrus_mapper * __restrict cm,
_index_t * __restrict dst, _index_t src,
void * __restrict ps)
{
struct _citrus_mapper_std *ms;
_DIAGASSERT(cm!=NULL && cm->cm_closure!=NULL);
ms = cm->cm_closure;
_DIAGASSERT(ms->ms_convert != NULL);
return (*ms->ms_convert)(ms, dst, src, ps);
}