/* $OpenBSD: db_variables.c,v 1.5 1996/04/21 22:19:18 deraadt Exp $ */ /* $NetBSD: db_variables.c,v 1.8 1996/02/05 01:57:19 christos Exp $ */ /* * Mach Operating System * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University * All Rights Reserved. * * Permission to use, copy, modify and distribute this software and its * documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie Mellon * the rights to redistribute these changes. */ #include <sys/param.h> #include <sys/proc.h> #include <machine/db_machdep.h> #include <ddb/db_lex.h> #include <ddb/db_variables.h> #include <ddb/db_command.h> #include <ddb/db_sym.h> #include <ddb/db_extern.h> #include <ddb/db_var.h> struct db_variable db_vars[] = { { "radix", &db_radix, FCN_NULL }, { "maxoff", (int *)&db_maxoff, FCN_NULL }, { "maxwidth", &db_max_width, FCN_NULL }, { "tabstops", &db_tab_stop_width, FCN_NULL }, { "lines", &db_max_line, FCN_NULL }, }; struct db_variable *db_evars = db_vars + sizeof(db_vars)/sizeof(db_vars[0]); int db_find_variable(varp) struct db_variable **varp; { int t; struct db_variable *vp; t = db_read_token(); if (t == tIDENT) { for (vp = db_vars; vp < db_evars; vp++) { if (!strcmp(db_tok_string, vp->name)) { *varp = vp; return (1); } } for (vp = db_regs; vp < db_eregs; vp++) { if (!strcmp(db_tok_string, vp->name)) { *varp = vp; return (1); } } } db_error("Unknown variable\n"); /*NOTREACHED*/ return 0; } int db_get_variable(valuep) db_expr_t *valuep; { struct db_variable *vp; if (!db_find_variable(&vp)) return (0); db_read_variable(vp, valuep); return (1); } int db_set_variable(value) db_expr_t value; { struct db_variable *vp; if (!db_find_variable(&vp)) return (0); db_write_variable(vp, &value); return (1); } void db_read_variable(vp, valuep) struct db_variable *vp; db_expr_t *valuep; { int (*func) __P((struct db_variable *, db_expr_t *, int)) = vp->fcn; if (func == FCN_NULL) *valuep = *(vp->valuep); else (*func)(vp, valuep, DB_VAR_GET); } void db_write_variable(vp, valuep) struct db_variable *vp; db_expr_t *valuep; { int (*func) __P((struct db_variable *, db_expr_t *, int)) = vp->fcn; if (func == FCN_NULL) *(vp->valuep) = *valuep; else (*func)(vp, valuep, DB_VAR_SET); } /*ARGSUSED*/ void db_set_cmd(addr, have_addr, count, modif) db_expr_t addr; int have_addr; db_expr_t count; char * modif; { db_expr_t value; struct db_variable *vp; int t; t = db_read_token(); if (t != tDOLLAR) { db_error("Unknown variable\n"); /*NOTREACHED*/ } if (!db_find_variable(&vp)) { db_error("Unknown variable\n"); /*NOTREACHED*/ } t = db_read_token(); if (t != tEQ) db_unread_token(t); if (!db_expression(&value)) { db_error("No value\n"); /*NOTREACHED*/ } if (db_read_token() != tEOL) { db_error("?\n"); /*NOTREACHED*/ } db_write_variable(vp, &value); }