1 /* $NetBSD: citrus_mapper_std.c,v 1.4 2004/12/21 11:25:43 yamt Exp $ */ 2 3 /*- 4 * Copyright (c)2003 Citrus Project, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 #if defined(LIBC_SCCS) && !defined(lint) 31 __RCSID("$NetBSD: citrus_mapper_std.c,v 1.4 2004/12/21 11:25:43 yamt Exp $"); 32 #endif /* LIBC_SCCS and not lint */ 33 34 #include <assert.h> 35 #include <errno.h> 36 #include <limits.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <stdint.h> 40 #include <string.h> 41 #include <sys/endian.h> 42 #include <sys/queue.h> 43 44 #include "citrus_namespace.h" 45 #include "citrus_types.h" 46 #include "citrus_bcs.h" 47 #include "citrus_region.h" 48 #include "citrus_mmap.h" 49 #include "citrus_module.h" 50 #include "citrus_hash.h" 51 #include "citrus_mapper.h" 52 #include "citrus_db.h" 53 #include "citrus_db_hash.h" 54 55 #include "citrus_mapper_std.h" 56 #include "citrus_mapper_std_file.h" 57 58 /* ---------------------------------------------------------------------- */ 59 60 _CITRUS_MAPPER_DECLS(mapper_std); 61 _CITRUS_MAPPER_DEF_OPS(mapper_std); 62 63 64 /* ---------------------------------------------------------------------- */ 65 66 int 67 _citrus_mapper_std_mapper_getops(struct _citrus_mapper_ops *ops, size_t lenops, 68 u_int32_t expected_version) 69 { 70 if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops)) 71 return (EINVAL); 72 73 memcpy(ops, &_citrus_mapper_std_mapper_ops, 74 sizeof(_citrus_mapper_std_mapper_ops)); 75 76 return (0); 77 } 78 79 /* ---------------------------------------------------------------------- */ 80 81 static int 82 /*ARGSUSED*/ 83 rowcol_convert(struct _citrus_mapper_std * __restrict ms, 84 _index_t * __restrict dst, _index_t src, 85 void * __restrict ps) 86 { 87 struct _citrus_mapper_std_rowcol *rc = &ms->ms_rowcol; 88 _index_t row, col, idx; 89 u_int32_t conv; 90 91 if (rc->rc_src_col_bits == 32) { 92 row = 0; 93 col = src; 94 } else { 95 row = src >> rc->rc_src_col_bits; 96 col = src & ((1U<<rc->rc_src_col_bits)-1); 97 } 98 if (row < rc->rc_src_row_begin || row > rc->rc_src_row_end || 99 col < rc->rc_src_col_begin || col > rc->rc_src_col_end) { 100 switch (rc->rc_oob_mode) { 101 case _CITRUS_MAPPER_STD_OOB_NONIDENTICAL: 102 *dst = rc->rc_dst_invalid; 103 return _MAPPER_CONVERT_NONIDENTICAL; 104 case _CITRUS_MAPPER_STD_OOB_ILSEQ: 105 return _MAPPER_CONVERT_ILSEQ; 106 default: 107 return _MAPPER_CONVERT_FATAL; 108 } 109 } 110 111 idx = 112 (row - rc->rc_src_row_begin)*rc->rc_src_col_width + 113 (col - rc->rc_src_col_begin); 114 115 switch (rc->rc_dst_unit_bits) { 116 case 8: 117 conv = _region_peek8(&rc->rc_table, idx); 118 break; 119 case 16: 120 conv = be16toh(_region_peek16(&rc->rc_table, idx*2)); 121 break; 122 case 32: 123 conv = be32toh(_region_peek32(&rc->rc_table, idx*4)); 124 break; 125 } 126 127 if (conv == rc->rc_dst_invalid) { 128 *dst = rc->rc_dst_invalid; 129 return _MAPPER_CONVERT_NONIDENTICAL; 130 } 131 if (conv == rc->rc_dst_ilseq) 132 return _MAPPER_CONVERT_ILSEQ; 133 134 *dst = conv; 135 136 return _MAPPER_CONVERT_SUCCESS; 137 } 138 139 140 static int 141 rowcol_init(struct _citrus_mapper_std *ms) 142 { 143 int ret; 144 struct _citrus_mapper_std_rowcol *rc = &ms->ms_rowcol; 145 const struct _citrus_mapper_std_rowcol_info_x *rcx; 146 const struct _citrus_mapper_std_rowcol_ext_ilseq_info_x *eix; 147 struct _region r; 148 u_int64_t table_size; 149 150 ms->ms_convert = &rowcol_convert; 151 ms->ms_uninit = NULL; 152 153 /* get table region */ 154 ret = _db_lookup_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_TABLE, 155 &rc->rc_table, NULL); 156 if (ret) { 157 if (ret==ENOENT) 158 ret = EFTYPE; 159 return ret; 160 } 161 162 /* get table information */ 163 ret = _db_lookup_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_INFO, &r, NULL); 164 if (ret) { 165 if (ret==ENOENT) 166 ret = EFTYPE; 167 return ret; 168 } 169 if (_region_size(&r) < sizeof(*rcx)) 170 return EFTYPE; 171 rcx = _region_head(&r); 172 173 /* convert */ 174 #define CONV_ROWCOL(rc, rcx, elem) \ 175 do { \ 176 (rc)->rc_##elem = be32toh((rcx)->rcx_##elem); \ 177 } while (/*CONSTCOND*/0) 178 CONV_ROWCOL(rc, rcx, src_col_bits); 179 CONV_ROWCOL(rc, rcx, dst_invalid); 180 CONV_ROWCOL(rc, rcx, src_row_begin); 181 CONV_ROWCOL(rc, rcx, src_row_end); 182 CONV_ROWCOL(rc, rcx, src_col_begin); 183 CONV_ROWCOL(rc, rcx, src_col_end); 184 CONV_ROWCOL(rc, rcx, dst_unit_bits); 185 186 /* ilseq extension */ 187 rc->rc_oob_mode = _CITRUS_MAPPER_STD_OOB_NONIDENTICAL; 188 rc->rc_dst_ilseq = rc->rc_dst_invalid; 189 ret = _db_lookup_by_s(ms->ms_db, 190 _CITRUS_MAPPER_STD_SYM_ROWCOL_EXT_ILSEQ, 191 &r, NULL); 192 if (ret && ret != ENOENT) 193 return ret; 194 if (_region_size(&r) < sizeof(*eix)) 195 return EFTYPE; 196 if (ret == 0) { 197 eix = _region_head(&r); 198 rc->rc_oob_mode = be32toh(eix->eix_oob_mode); 199 rc->rc_dst_ilseq = be32toh(eix->eix_dst_ilseq); 200 } 201 rc->rc_src_col_width = rc->rc_src_col_end - rc->rc_src_col_begin +1; 202 203 /* validation checks */ 204 if (rc->rc_src_col_end < rc->rc_src_col_begin || 205 rc->rc_src_row_end < rc->rc_src_row_begin || 206 !(rc->rc_dst_unit_bits==8 || rc->rc_dst_unit_bits==16 || 207 rc->rc_dst_unit_bits==32) || 208 !(rc->rc_src_col_bits >= 0 && rc->rc_src_col_bits <= 32)) 209 return EFTYPE; 210 211 /* calcurate expected table size */ 212 table_size = rc->rc_src_row_end - rc->rc_src_row_begin + 1; 213 table_size *= rc->rc_src_col_width; 214 table_size *= rc->rc_dst_unit_bits/8; 215 216 if (table_size > UINT32_MAX || 217 _region_size(&rc->rc_table) < table_size) 218 return EFTYPE; 219 220 return 0; 221 } 222 223 typedef int (*initfunc_t)(struct _citrus_mapper_std *); 224 static const struct { 225 const char *t_name; 226 initfunc_t t_init; 227 } types[] = { 228 { _CITRUS_MAPPER_STD_TYPE_ROWCOL, &rowcol_init }, 229 }; 230 #define NUM_OF_TYPES ((int)(sizeof(types)/sizeof(types[0]))) 231 232 static int 233 /*ARGSUSED*/ 234 _citrus_mapper_std_mapper_init(struct _citrus_mapper_area *__restrict ma, 235 struct _citrus_mapper * __restrict cm, 236 const char * __restrict curdir, 237 const void * __restrict var, size_t lenvar, 238 struct _citrus_mapper_traits * __restrict mt, 239 size_t lenmt) 240 { 241 char path[PATH_MAX]; 242 const char *type; 243 int ret, id; 244 struct _citrus_mapper_std *ms; 245 246 /* set traits */ 247 if (lenmt<sizeof(*mt)) { 248 ret = EINVAL; 249 goto err0; 250 } 251 mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */ 252 mt->mt_state_size = 0; /* stateless */ 253 254 /* alloc mapper std structure */ 255 ms = malloc(sizeof(*ms)); 256 if (ms==NULL) { 257 ret = errno; 258 goto err0; 259 } 260 261 /* open mapper file */ 262 snprintf(path, sizeof(path), 263 "%s/%.*s", curdir, (int)lenvar, (const char *)var); 264 ret = _map_file(&ms->ms_file, path); 265 if (ret) 266 goto err1; 267 268 ret = _db_open(&ms->ms_db, &ms->ms_file, _CITRUS_MAPPER_STD_MAGIC, 269 &_db_hash_std, NULL); 270 if (ret) 271 goto err2; 272 273 /* get mapper type */ 274 ret = _db_lookupstr_by_s(ms->ms_db, _CITRUS_MAPPER_STD_SYM_TYPE, 275 &type, NULL); 276 if (ret) { 277 if (ret==ENOENT) 278 ret = EFTYPE; 279 goto err3; 280 } 281 for (id=0; id<NUM_OF_TYPES; id++) 282 if (_bcs_strcasecmp(type, types[id].t_name) == 0) 283 break; 284 285 if (id == NUM_OF_TYPES) 286 goto err3; 287 288 /* init the per-type structure */ 289 ret = (*types[id].t_init)(ms); 290 if (ret) 291 goto err3; 292 293 cm->cm_closure = ms; 294 295 return 0; 296 297 err3: 298 _db_close(ms->ms_db); 299 err2: 300 _unmap_file(&ms->ms_file); 301 err1: 302 free(ms); 303 err0: 304 return ret; 305 } 306 307 static void 308 /*ARGSUSED*/ 309 _citrus_mapper_std_mapper_uninit(struct _citrus_mapper *cm) 310 { 311 struct _citrus_mapper_std *ms; 312 313 _DIAGASSERT(cm!=NULL & cm->cm_closure!=NULL); 314 315 ms = cm->cm_closure; 316 if (ms->ms_uninit) 317 (*ms->ms_uninit)(ms); 318 _db_close(ms->ms_db); 319 _unmap_file(&ms->ms_file); 320 free(ms); 321 } 322 323 static void 324 /*ARGSUSED*/ 325 _citrus_mapper_std_mapper_init_state(struct _citrus_mapper * __restrict cm, 326 void * __restrict ps) 327 { 328 } 329 330 static int 331 /*ARGSUSED*/ 332 _citrus_mapper_std_mapper_convert(struct _citrus_mapper * __restrict cm, 333 _index_t * __restrict dst, _index_t src, 334 void * __restrict ps) 335 { 336 struct _citrus_mapper_std *ms; 337 338 _DIAGASSERT(cm!=NULL && cm->cm_closure!=NULL); 339 340 ms = cm->cm_closure; 341 342 _DIAGASSERT(ms->ms_convert != NULL); 343 344 return (*ms->ms_convert)(ms, dst, src, ps); 345 } 346