gen_length.c revision 178826
1/* 2 * Copyright (c) 1997 - 2005 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include "gen_locl.h" 35 36RCSID("$Id: gen_length.c 21503 2007-07-12 11:57:19Z lha $"); 37 38static void 39length_primitive (const char *typename, 40 const char *name, 41 const char *variable) 42{ 43 fprintf (codefile, "%s += der_length_%s(%s);\n", variable, typename, name); 44} 45 46static size_t 47length_tag(unsigned int tag) 48{ 49 size_t len = 0; 50 51 if(tag <= 30) 52 return 1; 53 while(tag) { 54 tag /= 128; 55 len++; 56 } 57 return len + 1; 58} 59 60 61static int 62length_type (const char *name, const Type *t, 63 const char *variable, const char *tmpstr) 64{ 65 switch (t->type) { 66 case TType: 67#if 0 68 length_type (name, t->symbol->type); 69#endif 70 fprintf (codefile, "%s += length_%s(%s);\n", 71 variable, t->symbol->gen_name, name); 72 break; 73 case TInteger: 74 if(t->members) { 75 fprintf(codefile, 76 "{\n" 77 "int enumint = *%s;\n", name); 78 length_primitive ("integer", "&enumint", variable); 79 fprintf(codefile, "}\n"); 80 } else if (t->range == NULL) { 81 length_primitive ("heim_integer", name, variable); 82 } else if (t->range->min == INT_MIN && t->range->max == INT_MAX) { 83 length_primitive ("integer", name, variable); 84 } else if (t->range->min == 0 && t->range->max == UINT_MAX) { 85 length_primitive ("unsigned", name, variable); 86 } else if (t->range->min == 0 && t->range->max == INT_MAX) { 87 length_primitive ("unsigned", name, variable); 88 } else 89 errx(1, "%s: unsupported range %d -> %d", 90 name, t->range->min, t->range->max); 91 92 break; 93 case TBoolean: 94 fprintf (codefile, "%s += 1;\n", variable); 95 break; 96 case TEnumerated : 97 length_primitive ("enumerated", name, variable); 98 break; 99 case TOctetString: 100 length_primitive ("octet_string", name, variable); 101 break; 102 case TBitString: { 103 if (ASN1_TAILQ_EMPTY(t->members)) 104 length_primitive("bit_string", name, variable); 105 else { 106 if (!rfc1510_bitstring) { 107 Member *m; 108 int pos = ASN1_TAILQ_LAST(t->members, memhead)->val; 109 110 fprintf(codefile, 111 "do {\n"); 112 ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) { 113 while (m->val / 8 < pos / 8) { 114 pos -= 8; 115 } 116 fprintf (codefile, 117 "if((%s)->%s) { %s += %d; break; }\n", 118 name, m->gen_name, variable, (pos + 8) / 8); 119 } 120 fprintf(codefile, 121 "} while(0);\n"); 122 fprintf (codefile, "%s += 1;\n", variable); 123 } else { 124 fprintf (codefile, "%s += 5;\n", variable); 125 } 126 } 127 break; 128 } 129 case TSet: 130 case TSequence: 131 case TChoice: { 132 Member *m, *have_ellipsis = NULL; 133 134 if (t->members == NULL) 135 break; 136 137 if(t->type == TChoice) 138 fprintf (codefile, "switch((%s)->element) {\n", name); 139 140 ASN1_TAILQ_FOREACH(m, t->members, members) { 141 char *s; 142 143 if (m->ellipsis) { 144 have_ellipsis = m; 145 continue; 146 } 147 148 if(t->type == TChoice) 149 fprintf(codefile, "case %s:\n", m->label); 150 151 asprintf (&s, "%s(%s)->%s%s", 152 m->optional ? "" : "&", name, 153 t->type == TChoice ? "u." : "", m->gen_name); 154 if (s == NULL) 155 errx(1, "malloc"); 156 if (m->optional) 157 fprintf (codefile, "if(%s)", s); 158 else if(m->defval) 159 gen_compare_defval(s + 1, m->defval); 160 fprintf (codefile, "{\n" 161 "size_t %s_oldret = %s;\n" 162 "%s = 0;\n", tmpstr, variable, variable); 163 length_type (s, m->type, "ret", m->gen_name); 164 fprintf (codefile, "ret += %s_oldret;\n", tmpstr); 165 fprintf (codefile, "}\n"); 166 free (s); 167 if(t->type == TChoice) 168 fprintf(codefile, "break;\n"); 169 } 170 if(t->type == TChoice) { 171 if (have_ellipsis) 172 fprintf(codefile, 173 "case %s:\n" 174 "ret += (%s)->u.%s.length;\n" 175 "break;\n", 176 have_ellipsis->label, 177 name, 178 have_ellipsis->gen_name); 179 fprintf (codefile, "}\n"); /* switch */ 180 } 181 break; 182 } 183 case TSetOf: 184 case TSequenceOf: { 185 char *n; 186 char *sname; 187 188 fprintf (codefile, 189 "{\n" 190 "int %s_oldret = %s;\n" 191 "int i;\n" 192 "%s = 0;\n", 193 tmpstr, variable, variable); 194 195 fprintf (codefile, "for(i = (%s)->len - 1; i >= 0; --i){\n", name); 196 fprintf (codefile, "int %s_for_oldret = %s;\n" 197 "%s = 0;\n", tmpstr, variable, variable); 198 asprintf (&n, "&(%s)->val[i]", name); 199 if (n == NULL) 200 errx(1, "malloc"); 201 asprintf (&sname, "%s_S_Of", tmpstr); 202 if (sname == NULL) 203 errx(1, "malloc"); 204 length_type(n, t->subtype, variable, sname); 205 fprintf (codefile, "%s += %s_for_oldret;\n", 206 variable, tmpstr); 207 fprintf (codefile, "}\n"); 208 209 fprintf (codefile, 210 "%s += %s_oldret;\n" 211 "}\n", variable, tmpstr); 212 free(n); 213 free(sname); 214 break; 215 } 216 case TGeneralizedTime: 217 length_primitive ("generalized_time", name, variable); 218 break; 219 case TGeneralString: 220 length_primitive ("general_string", name, variable); 221 break; 222 case TUTCTime: 223 length_primitive ("utctime", name, variable); 224 break; 225 case TUTF8String: 226 length_primitive ("utf8string", name, variable); 227 break; 228 case TPrintableString: 229 length_primitive ("printable_string", name, variable); 230 break; 231 case TIA5String: 232 length_primitive ("ia5_string", name, variable); 233 break; 234 case TBMPString: 235 length_primitive ("bmp_string", name, variable); 236 break; 237 case TUniversalString: 238 length_primitive ("universal_string", name, variable); 239 break; 240 case TVisibleString: 241 length_primitive ("visible_string", name, variable); 242 break; 243 case TNull: 244 fprintf (codefile, "/* NULL */\n"); 245 break; 246 case TTag:{ 247 char *tname; 248 asprintf(&tname, "%s_tag", tmpstr); 249 if (tname == NULL) 250 errx(1, "malloc"); 251 length_type (name, t->subtype, variable, tname); 252 fprintf (codefile, "ret += %lu + der_length_len (ret);\n", 253 (unsigned long)length_tag(t->tag.tagvalue)); 254 free(tname); 255 break; 256 } 257 case TOID: 258 length_primitive ("oid", name, variable); 259 break; 260 default : 261 abort (); 262 } 263 return 0; 264} 265 266void 267generate_type_length (const Symbol *s) 268{ 269 fprintf (headerfile, 270 "size_t length_%s(const %s *);\n", 271 s->gen_name, s->gen_name); 272 273 fprintf (codefile, 274 "size_t\n" 275 "length_%s(const %s *data)\n" 276 "{\n" 277 "size_t ret = 0;\n", 278 s->gen_name, s->gen_name); 279 280 length_type ("data", s->type, "ret", "Top"); 281 fprintf (codefile, "return ret;\n}\n\n"); 282} 283 284