1 /* 2 * Copyright (c) 1997 - 2000 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 36 RCSID("$Id: gen_length.c,v 1.10 2000/06/21 22:40:53 assar Exp $"); 37 38 static void 39 length_primitive (const char *typename, 40 const char *name, 41 const char *variable) 42 { 43 fprintf (codefile, "%s += length_%s(%s);\n", variable, typename, name); 44 } 45 46 static void 47 length_type (const char *name, const Type *t, const char *variable) 48 { 49 switch (t->type) { 50 case TType: 51 #if 0 52 length_type (name, t->symbol->type); 53 #endif 54 fprintf (codefile, "%s += length_%s(%s);\n", 55 variable, t->symbol->gen_name, name); 56 break; 57 case TInteger: 58 if(t->members == NULL) 59 length_primitive ("integer", name, variable); 60 else { 61 char *s; 62 asprintf(&s, "(const int*)%s", name); 63 if(s == NULL) 64 errx (1, "out of memory"); 65 length_primitive ("integer", s, variable); 66 free(s); 67 } 68 break; 69 case TUInteger: 70 length_primitive ("unsigned", name, variable); 71 break; 72 case TOctetString: 73 length_primitive ("octet_string", name, variable); 74 break; 75 case TBitString: { 76 /* 77 * XXX - Hope this is correct 78 * look at TBitString case in `encode_type' 79 */ 80 fprintf (codefile, "%s += 7;\n", variable); 81 break; 82 } 83 case TSequence: { 84 Member *m; 85 int tag = -1; 86 87 if (t->members == NULL) 88 break; 89 90 for (m = t->members; m && tag != m->val; m = m->next) { 91 char *s; 92 93 asprintf (&s, "%s(%s)->%s", 94 m->optional ? "" : "&", name, m->gen_name); 95 if (m->optional) 96 fprintf (codefile, "if(%s)", s); 97 fprintf (codefile, "{\n" 98 "int oldret = %s;\n" 99 "%s = 0;\n", variable, variable); 100 length_type (s, m->type, "ret"); 101 fprintf (codefile, "%s += 1 + length_len(%s) + oldret;\n", 102 variable, variable); 103 fprintf (codefile, "}\n"); 104 if (tag == -1) 105 tag = m->val; 106 free (s); 107 } 108 fprintf (codefile, 109 "%s += 1 + length_len(%s);\n", variable, variable); 110 break; 111 } 112 case TSequenceOf: { 113 char *n; 114 115 fprintf (codefile, 116 "{\n" 117 "int oldret = %s;\n" 118 "int i;\n" 119 "%s = 0;\n", 120 variable, variable); 121 122 fprintf (codefile, "for(i = (%s)->len - 1; i >= 0; --i){\n", name); 123 asprintf (&n, "&(%s)->val[i]", name); 124 length_type(n, t->subtype, variable); 125 fprintf (codefile, "}\n"); 126 127 fprintf (codefile, 128 "%s += 1 + length_len(%s) + oldret;\n" 129 "}\n", variable, variable); 130 free(n); 131 break; 132 } 133 case TGeneralizedTime: 134 length_primitive ("generalized_time", name, variable); 135 break; 136 case TGeneralString: 137 length_primitive ("general_string", name, variable); 138 break; 139 case TApplication: 140 length_type (name, t->subtype, variable); 141 fprintf (codefile, "ret += 1 + length_len (ret);\n"); 142 break; 143 default : 144 abort (); 145 } 146 } 147 148 void 149 generate_type_length (const Symbol *s) 150 { 151 fprintf (headerfile, 152 "size_t length_%s(const %s *);\n", 153 s->gen_name, s->gen_name); 154 155 fprintf (codefile, 156 "size_t\n" 157 "length_%s(const %s *data)\n" 158 "{\n" 159 "size_t ret = 0;\n", 160 s->gen_name, s->gen_name); 161 162 length_type ("data", s->type, "ret"); 163 fprintf (codefile, "return ret;\n}\n\n"); 164 } 165 166