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- /*
- * Copyright (c) 1983 Eric P. Allman
- * Copyright (c) 1988 Regents of the University of California.
- * 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)stab.c 5.7 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- # include "sendmail.h"
-
- /*
- ** STAB -- manage the symbol table
- **
- ** Parameters:
- ** name -- the name to be looked up or inserted.
- ** type -- the type of symbol.
- ** op -- what to do:
- ** ST_ENTER -- enter the name if not
- ** already present.
- ** ST_FIND -- find it only.
- **
- ** Returns:
- ** pointer to a STAB entry for this name.
- ** NULL if not found and not entered.
- **
- ** Side Effects:
- ** can update the symbol table.
- */
-
- # define STABSIZE 400
-
- static STAB *SymTab[STABSIZE];
-
- STAB *
- stab(name, type, op)
- char *name;
- int type;
- int op;
- {
- register STAB *s;
- register STAB **ps;
- register int hfunc;
- register char *p;
- extern char lower();
-
- if (tTd(36, 5))
- printf("STAB: %s %d ", name, type);
-
- /*
- ** Compute the hashing function
- **
- ** We could probably do better....
- */
-
- hfunc = type;
- for (p = name; *p != '\0'; p++)
- hfunc = (((hfunc << 7) | lower(*p)) & 077777) % STABSIZE;
-
- if (tTd(36, 9))
- printf("(hfunc=%d) ", hfunc);
-
- ps = &SymTab[hfunc];
- while ((s = *ps) != NULL && (strcasecmp(name, s->s_name) || s->s_type != type))
- ps = &s->s_next;
-
- /*
- ** Dispose of the entry.
- */
-
- if (s != NULL || op == ST_FIND)
- {
- if (tTd(36, 5))
- {
- if (s == NULL)
- printf("not found\n");
- else
- {
- long *lp = (long *) s->s_class;
-
- printf("type %d val %lx %lx %lx %lx\n",
- s->s_type, lp[0], lp[1], lp[2], lp[3]);
- }
- }
- return (s);
- }
-
- /*
- ** Make a new entry and link it in.
- */
-
- if (tTd(36, 5))
- printf("entered\n");
-
- /* make new entry */
- s = (STAB *) xalloc(sizeof *s);
- bzero((char *) s, sizeof *s);
- s->s_name = newstr(name);
- makelower(s->s_name);
- s->s_type = type;
-
- /* link it in */
- *ps = s;
-
- return (s);
- }
-