diff options
Diffstat (limited to 'usr.bin/asn1_compile/gen_glue.c')
| -rw-r--r-- | usr.bin/asn1_compile/gen_glue.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/usr.bin/asn1_compile/gen_glue.c b/usr.bin/asn1_compile/gen_glue.c new file mode 100644 index 00000000000..84e964f27e8 --- /dev/null +++ b/usr.bin/asn1_compile/gen_glue.c @@ -0,0 +1,141 @@ +/* + * Copyright (c) 1997, 1999 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "gen_locl.h" + +/* +RCSID("$KTH: gen_glue.c,v 1.7 1999/12/02 17:05:02 joda Exp $"); +*/ + +static void +generate_2int (const Symbol *s) +{ + Type *t = s->type; + Member *m; + int tag = -1; + + fprintf (headerfile, + "unsigned %s2int(%s);\n", + s->gen_name, s->gen_name); + + fprintf (codefile, + "unsigned %s2int(%s f)\n" + "{\n" + "unsigned r = 0;\n", + s->gen_name, s->gen_name); + + for (m = t->members; m && m->val != tag; m = m->next) { + fprintf (codefile, "if(f.%s) r |= (1U << %d);\n", + m->gen_name, m->val); + + if (tag == -1) + tag = m->val; + } + fprintf (codefile, "return r;\n" + "}\n\n"); +} + +static void +generate_int2 (const Symbol *s) +{ + Type *t = s->type; + Member *m; + int tag = -1; + + fprintf (headerfile, + "%s int2%s(unsigned);\n", + s->gen_name, s->gen_name); + + fprintf (codefile, + "%s int2%s(unsigned n)\n" + "{\n" + "\t%s flags;\n\n", + s->gen_name, s->gen_name, s->gen_name); + + for (m = t->members; m && m->val != tag; m = m->next) { + fprintf (codefile, "\tflags.%s = (n >> %d) & 1;\n", + m->gen_name, m->val); + + if (tag == -1) + tag = m->val; + } + fprintf (codefile, "\treturn flags;\n" + "}\n\n"); +} + +/* + * This depends on the bit string being declared in increasing order + */ + +static void +generate_units (const Symbol *s) +{ + Type *t = s->type; + Member *m; + int tag = -1; + + fprintf (headerfile, + "extern struct units %s_units[];", + s->gen_name); + + fprintf (codefile, + "struct units %s_units[] = {\n", + s->gen_name); + + if(t->members) + for (m = t->members->prev; m && m->val != tag; m = m->prev) { + fprintf (codefile, + "\t{\"%s\",\t1U << %d},\n", m->gen_name, m->val); + + if (tag == -1) + tag = m->val; + } + + fprintf (codefile, + "\t{NULL,\t0}\n" + "};\n\n"); +} + +void +generate_glue (const Symbol *s) +{ + switch(s->type->type) { + case TBitString : + generate_2int (s); + generate_int2 (s); + generate_units (s); + break; + default : + break; + } +} |