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_glue.c,v 1.7 1999/12/02 17:05:02 joda Exp $"); 37 38 static void 39 generate_2int (const Symbol *s) 40 { 41 Type *t = s->type; 42 Member *m; 43 int tag = -1; 44 45 fprintf (headerfile, 46 "unsigned %s2int(%s);\n", 47 s->gen_name, s->gen_name); 48 49 fprintf (codefile, 50 "unsigned %s2int(%s f)\n" 51 "{\n" 52 "unsigned r = 0;\n", 53 s->gen_name, s->gen_name); 54 55 for (m = t->members; m && m->val != tag; m = m->next) { 56 fprintf (codefile, "if(f.%s) r |= (1U << %d);\n", 57 m->gen_name, m->val); 58 59 if (tag == -1) 60 tag = m->val; 61 } 62 fprintf (codefile, "return r;\n" 63 "}\n\n"); 64 } 65 66 static void 67 generate_int2 (const Symbol *s) 68 { 69 Type *t = s->type; 70 Member *m; 71 int tag = -1; 72 73 fprintf (headerfile, 74 "%s int2%s(unsigned);\n", 75 s->gen_name, s->gen_name); 76 77 fprintf (codefile, 78 "%s int2%s(unsigned n)\n" 79 "{\n" 80 "\t%s flags;\n\n", 81 s->gen_name, s->gen_name, s->gen_name); 82 83 for (m = t->members; m && m->val != tag; m = m->next) { 84 fprintf (codefile, "\tflags.%s = (n >> %d) & 1;\n", 85 m->gen_name, m->val); 86 87 if (tag == -1) 88 tag = m->val; 89 } 90 fprintf (codefile, "\treturn flags;\n" 91 "}\n\n"); 92 } 93 94 /* 95 * This depends on the bit string being declared in increasing order 96 */ 97 98 static void 99 generate_units (const Symbol *s) 100 { 101 Type *t = s->type; 102 Member *m; 103 int tag = -1; 104 105 fprintf (headerfile, 106 "extern struct units %s_units[];", 107 s->gen_name); 108 109 fprintf (codefile, 110 "struct units %s_units[] = {\n", 111 s->gen_name); 112 113 if(t->members) 114 for (m = t->members->prev; m && m->val != tag; m = m->prev) { 115 fprintf (codefile, 116 "\t{\"%s\",\t1U << %d},\n", m->gen_name, m->val); 117 118 if (tag == -1) 119 tag = m->val; 120 } 121 122 fprintf (codefile, 123 "\t{NULL,\t0}\n" 124 "};\n\n"); 125 } 126 127 void 128 generate_glue (const Symbol *s) 129 { 130 switch(s->type->type) { 131 case TBitString : 132 generate_2int (s); 133 generate_int2 (s); 134 generate_units (s); 135 break; 136 default : 137 break; 138 } 139 } 140