1 /* 2 * Copyright (c) 1997 - 1999 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 1.7 1999/12/02 17:05:02 joda 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 length_primitive ("integer", name, variable); 59 break; 60 case TOctetString: 61 length_primitive ("octet_string", name, variable); 62 break; 63 case TBitString: { 64 /* 65 * XXX - Hope this is correct 66 * look at TBitString case in `encode_type' 67 */ 68 fprintf (codefile, "%s += 7;\n", variable); 69 break; 70 } 71 case TSequence: { 72 Member *m; 73 int tag = -1; 74 75 if (t->members == NULL) 76 break; 77 78 for (m = t->members; m && tag != m->val; m = m->next) { 79 char *s; 80 81 asprintf (&s, "%s(%s)->%s", 82 m->optional ? "" : "&", name, m->gen_name); 83 if (m->optional) 84 fprintf (codefile, "if(%s)", s); 85 fprintf (codefile, "{\n" 86 "int oldret = %s;\n" 87 "%s = 0;\n", variable, variable); 88 length_type (s, m->type, "ret"); 89 fprintf (codefile, "%s += 1 + length_len(%s) + oldret;\n", 90 variable, variable); 91 fprintf (codefile, "}\n"); 92 if (tag == -1) 93 tag = m->val; 94 free (s); 95 } 96 fprintf (codefile, 97 "%s += 1 + length_len(%s);\n", variable, variable); 98 break; 99 } 100 case TSequenceOf: { 101 char *n; 102 103 fprintf (codefile, 104 "{\n" 105 "int oldret = %s;\n" 106 "int i;\n" 107 "%s = 0;\n", 108 variable, variable); 109 110 fprintf (codefile, "for(i = (%s)->len - 1; i >= 0; --i){\n", name); 111 asprintf (&n, "&(%s)->val[i]", name); 112 length_type(n, t->subtype, variable); 113 fprintf (codefile, "}\n"); 114 115 fprintf (codefile, 116 "%s += 1 + length_len(%s) + oldret;\n" 117 "}\n", variable, variable); 118 free(n); 119 break; 120 } 121 case TGeneralizedTime: 122 length_primitive ("generalized_time", name, variable); 123 break; 124 case TGeneralString: 125 length_primitive ("general_string", name, variable); 126 break; 127 case TApplication: 128 length_type (name, t->subtype, variable); 129 fprintf (codefile, "ret += 1 + length_len (ret);\n"); 130 break; 131 default : 132 abort (); 133 } 134 } 135 136 void 137 generate_type_length (const Symbol *s) 138 { 139 fprintf (headerfile, 140 "size_t length_%s(const %s *);\n", 141 s->gen_name, s->gen_name); 142 143 fprintf (codefile, 144 "size_t\n" 145 "length_%s(const %s *data)\n" 146 "{\n" 147 "size_t ret = 0;\n", 148 s->gen_name, s->gen_name); 149 150 length_type ("data", s->type, "ret"); 151 fprintf (codefile, "return ret;\n}\n\n"); 152 } 153 154