citrus_mapper_646.c revision 1.2
1 /* $NetBSD: citrus_mapper_646.c,v 1.2 2003/06/27 17:53:31 tshiozak 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_646.c,v 1.2 2003/06/27 17:53:31 tshiozak Exp $"); 32 #endif /* LIBC_SCCS and not lint */ 33 34 #include <assert.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <limits.h> 40 #include <sys/queue.h> 41 42 #include "citrus_namespace.h" 43 #include "citrus_types.h" 44 #include "citrus_bcs.h" 45 #include "citrus_module.h" 46 #include "citrus_region.h" 47 #include "citrus_memstream.h" 48 #include "citrus_mmap.h" 49 #include "citrus_hash.h" 50 #include "citrus_mapper.h" 51 #include "citrus_mapper_646.h" 52 53 /* ---------------------------------------------------------------------- */ 54 55 _CITRUS_MAPPER_DECLS(mapper_646); 56 _CITRUS_MAPPER_DEF_OPS(mapper_646); 57 58 /* ---------------------------------------------------------------------- */ 59 60 #define INVALID 0xFFFFFFFF 61 #define SPECIALS(x) \ 62 x(0x23) \ 63 x(0x24) \ 64 x(0x40) \ 65 x(0x5B) \ 66 x(0x5C) \ 67 x(0x5D) \ 68 x(0x5E) \ 69 x(0x60) \ 70 x(0x7B) \ 71 x(0x7C) \ 72 x(0x7D) \ 73 x(0x7E) 74 75 #define INDEX(x) INDEX_##x, 76 77 enum { 78 SPECIALS(INDEX) 79 NUM_OF_SPECIALS 80 }; 81 struct _citrus_mapper_646 { 82 int m6_forward; 83 _index_t m6_map[NUM_OF_SPECIALS]; 84 }; 85 86 int 87 _citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops, 88 size_t lenops, uint32_t expected_version) 89 { 90 if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops)) 91 return EINVAL; 92 93 memcpy(ops, &_citrus_mapper_646_mapper_ops, 94 sizeof(_citrus_mapper_646_mapper_ops)); 95 96 return 0; 97 } 98 99 #define T_COMM '#' 100 static int 101 parse_file(struct _citrus_mapper_646 *m6, const char *path) 102 { 103 int ret, i; 104 struct _region r; 105 struct _memstream ms; 106 const char *p; 107 size_t len; 108 char buf[PATH_MAX]; 109 110 ret = _map_file(&r, path); 111 if (ret) 112 return ret; 113 _memstream_bind(&ms, &r); 114 for (i=0; i<NUM_OF_SPECIALS; i++) { 115 retry: 116 p = _memstream_getln(&ms, &len); 117 if (p==NULL) { 118 ret = EINVAL; 119 break; 120 } 121 p = _bcs_skip_ws_len(p, &len); 122 if (*p == T_COMM || len==0) 123 goto retry; 124 if (!_bcs_isdigit(*p)) { 125 ret = EINVAL; 126 break; 127 } 128 snprintf(buf, sizeof(buf), "%.*s", (int)len, p); 129 m6->m6_map[i] = strtoul(buf, (char **)&p, 0); 130 p = _bcs_skip_ws(buf); 131 if (*p != T_COMM && !*p) { 132 ret = EINVAL; 133 break; 134 } 135 } 136 _unmap_file(&r); 137 138 return ret; 139 }; 140 141 static int 142 parse_var(struct _citrus_mapper_646 *m6, struct _memstream *ms, 143 const char *dir) 144 { 145 struct _region r; 146 char path[PATH_MAX]; 147 148 m6->m6_forward = 1; 149 _memstream_skip_ws(ms); 150 /* whether backward */ 151 if (_memstream_peek(ms) == '!') { 152 _memstream_getc(ms); 153 m6->m6_forward = 0; 154 } 155 /* get description file path */ 156 _memstream_getregion(ms, &r, _memstream_remainder(ms)); 157 snprintf(path, sizeof(path), "%s/%.*s", 158 dir, (int)_region_size(&r), (char *)_region_head(&r)); 159 /* remove trailing white spaces */ 160 path[_bcs_skip_nonws(path)-path] = '\0'; 161 return parse_file(m6, path); 162 } 163 164 static int 165 /*ARGSUSED*/ 166 _citrus_mapper_646_mapper_init(struct _citrus_mapper_area *__restrict ma, 167 struct _citrus_mapper * __restrict cm, 168 const char * __restrict dir, 169 const void * __restrict var, size_t lenvar, 170 struct _citrus_mapper_traits * __restrict mt, 171 size_t lenmt) 172 { 173 struct _citrus_mapper_646 *m6; 174 struct _memstream ms; 175 struct _region r; 176 int ret; 177 178 _DIAGASSERT(cm && dir && mt); 179 180 if (lenmt<sizeof(*mt)) 181 return EINVAL; 182 183 m6 = malloc(sizeof(*m6)); 184 if (m6 == NULL) 185 return errno; 186 187 _region_init(&r, (void *)var, lenvar); 188 _memstream_bind(&ms, &r); 189 ret = parse_var(m6, &ms, dir); 190 if (ret) { 191 free(m6); 192 return ret; 193 } 194 195 cm->cm_closure = m6; 196 mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */ 197 mt->mt_state_size = 0; /* stateless */ 198 199 return 0; 200 } 201 202 static void 203 /*ARGSUSED*/ 204 _citrus_mapper_646_mapper_uninit(struct _citrus_mapper *cm) 205 { 206 if (cm && cm->cm_closure) { 207 free(cm->cm_closure); 208 } 209 } 210 211 static int 212 /*ARGSUSED*/ 213 _citrus_mapper_646_mapper_convert(struct _citrus_mapper * __restrict cm, 214 _index_t * __restrict dst, _index_t src, 215 void * __restrict ps) 216 { 217 struct _citrus_mapper_646 *m6; 218 219 _DIAGASSERT(cm && cm->cm_closure); 220 221 m6 = cm->cm_closure; 222 if (m6->m6_forward) { 223 /* forward */ 224 if (src>=0x80) 225 return _MAPPER_CONVERT_INVAL; 226 #define FORWARD(x) \ 227 if (src==(x)) { \ 228 if (m6->m6_map[INDEX_##x]==INVALID) \ 229 return _MAPPER_CONVERT_INVAL; \ 230 *dst = m6->m6_map[INDEX_##x]; \ 231 return 0; \ 232 } else 233 SPECIALS(FORWARD); 234 *dst = src; 235 } else { 236 /* backward */ 237 #define BACKWARD(x) \ 238 if (m6->m6_map[INDEX_##x]!=INVALID && src==m6->m6_map[INDEX_##x]) { \ 239 *dst = (x); \ 240 return 0; \ 241 } else if (src==(x)) \ 242 return _MAPPER_CONVERT_INVAL; \ 243 else 244 SPECIALS(BACKWARD); 245 if (src>=0x80) 246 return _MAPPER_CONVERT_INVAL; 247 *dst = src; 248 } 249 250 return _MAPPER_CONVERT_SUCCESS; 251 } 252 253 static void 254 /*ARGSUSED*/ 255 _citrus_mapper_646_mapper_init_state(struct _citrus_mapper * __restrict cm, 256 void * __restrict ps) 257 { 258 } 259
Indexes created Fri Sep 26 20:09:58 GMT 2025