424 lines
9.0 KiB
C
424 lines
9.0 KiB
C
/* @(#)rpc_parse.c 2.1 88/08/01 4.0 RPCSRC */
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/*
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* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
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* unrestricted use provided that this legend is included on all tape
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* media and as a part of the software program in whole or part. Users
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* may copy or modify Sun RPC without charge, but are not authorized
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* to license or distribute it to anyone else except as part of a product or
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* program developed by the user.
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*
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* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
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* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
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*
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* Sun RPC is provided with no support and without any obligation on the
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* part of Sun Microsystems, Inc. to assist in its use, correction,
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* modification or enhancement.
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*
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* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
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* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
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* OR ANY PART THEREOF.
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*
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* In no event will Sun Microsystems, Inc. be liable for any lost revenue
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* or profits or other special, indirect and consequential damages, even if
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* Sun has been advised of the possibility of such damages.
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*
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* Sun Microsystems, Inc.
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* 2550 Garcia Avenue
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* Mountain View, California 94043
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*/
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#ifndef lint
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/*static char sccsid[] = "from: @(#)rpc_parse.c 1.4 87/04/28 (C) 1987 SMI";*/
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static char rcsid[] = "$Id: rpc_parse.c,v 1.1 1993/09/13 23:20:16 jtc Exp $";
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#endif
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/*
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* rpc_parse.c, Parser for the RPC protocol compiler
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* Copyright (C) 1987 Sun Microsystems, Inc.
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*/
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#include <stdio.h>
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#include "rpc_util.h"
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#include "rpc_scan.h"
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#include "rpc_parse.h"
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static int isdefined(), def_struct(), def_program(), def_enum(), def_const(),
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def_union(), def_typedef(), get_declaration(), get_type(),
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unsigned_dec();
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/*
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* return the next definition you see
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*/
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definition *
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get_definition()
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{
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definition *defp;
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token tok;
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defp = ALLOC(definition);
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get_token(&tok);
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switch (tok.kind) {
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case TOK_STRUCT:
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def_struct(defp);
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break;
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case TOK_UNION:
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def_union(defp);
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break;
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case TOK_TYPEDEF:
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def_typedef(defp);
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break;
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case TOK_ENUM:
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def_enum(defp);
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break;
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case TOK_PROGRAM:
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def_program(defp);
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break;
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case TOK_CONST:
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def_const(defp);
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break;
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case TOK_EOF:
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return (NULL);
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break;
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default:
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error("definition keyword expected");
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}
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scan(TOK_SEMICOLON, &tok);
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isdefined(defp);
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return (defp);
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}
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static
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isdefined(defp)
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definition *defp;
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{
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STOREVAL(&defined, defp);
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}
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static
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def_struct(defp)
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definition *defp;
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{
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token tok;
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declaration dec;
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decl_list *decls;
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decl_list **tailp;
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defp->def_kind = DEF_STRUCT;
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scan(TOK_IDENT, &tok);
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defp->def_name = tok.str;
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scan(TOK_LBRACE, &tok);
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tailp = &defp->def.st.decls;
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do {
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get_declaration(&dec, DEF_STRUCT);
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decls = ALLOC(decl_list);
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decls->decl = dec;
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*tailp = decls;
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tailp = &decls->next;
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scan(TOK_SEMICOLON, &tok);
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peek(&tok);
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} while (tok.kind != TOK_RBRACE);
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get_token(&tok);
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*tailp = NULL;
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}
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static
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def_program(defp)
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definition *defp;
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{
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token tok;
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version_list *vlist;
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version_list **vtailp;
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proc_list *plist;
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proc_list **ptailp;
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defp->def_kind = DEF_PROGRAM;
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scan(TOK_IDENT, &tok);
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defp->def_name = tok.str;
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scan(TOK_LBRACE, &tok);
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vtailp = &defp->def.pr.versions;
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scan(TOK_VERSION, &tok);
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do {
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scan(TOK_IDENT, &tok);
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vlist = ALLOC(version_list);
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vlist->vers_name = tok.str;
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scan(TOK_LBRACE, &tok);
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ptailp = &vlist->procs;
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do {
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plist = ALLOC(proc_list);
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get_type(&plist->res_prefix, &plist->res_type, DEF_PROGRAM);
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if (streq(plist->res_type, "opaque")) {
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error("illegal result type");
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}
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scan(TOK_IDENT, &tok);
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plist->proc_name = tok.str;
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scan(TOK_LPAREN, &tok);
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get_type(&plist->arg_prefix, &plist->arg_type, DEF_PROGRAM);
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if (streq(plist->arg_type, "opaque")) {
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error("illegal argument type");
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}
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scan(TOK_RPAREN, &tok);
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scan(TOK_EQUAL, &tok);
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scan_num(&tok);
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scan(TOK_SEMICOLON, &tok);
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plist->proc_num = tok.str;
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*ptailp = plist;
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ptailp = &plist->next;
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peek(&tok);
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} while (tok.kind != TOK_RBRACE);
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*vtailp = vlist;
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vtailp = &vlist->next;
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scan(TOK_RBRACE, &tok);
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scan(TOK_EQUAL, &tok);
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scan_num(&tok);
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vlist->vers_num = tok.str;
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scan(TOK_SEMICOLON, &tok);
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scan2(TOK_VERSION, TOK_RBRACE, &tok);
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} while (tok.kind == TOK_VERSION);
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scan(TOK_EQUAL, &tok);
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scan_num(&tok);
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defp->def.pr.prog_num = tok.str;
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*vtailp = NULL;
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}
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static
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def_enum(defp)
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definition *defp;
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{
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token tok;
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enumval_list *elist;
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enumval_list **tailp;
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defp->def_kind = DEF_ENUM;
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scan(TOK_IDENT, &tok);
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defp->def_name = tok.str;
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scan(TOK_LBRACE, &tok);
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tailp = &defp->def.en.vals;
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do {
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scan(TOK_IDENT, &tok);
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elist = ALLOC(enumval_list);
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elist->name = tok.str;
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elist->assignment = NULL;
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scan3(TOK_COMMA, TOK_RBRACE, TOK_EQUAL, &tok);
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if (tok.kind == TOK_EQUAL) {
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scan_num(&tok);
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elist->assignment = tok.str;
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scan2(TOK_COMMA, TOK_RBRACE, &tok);
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}
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*tailp = elist;
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tailp = &elist->next;
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} while (tok.kind != TOK_RBRACE);
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*tailp = NULL;
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}
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static
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def_const(defp)
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definition *defp;
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{
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token tok;
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defp->def_kind = DEF_CONST;
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scan(TOK_IDENT, &tok);
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defp->def_name = tok.str;
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scan(TOK_EQUAL, &tok);
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scan2(TOK_IDENT, TOK_STRCONST, &tok);
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defp->def.co = tok.str;
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}
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static
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def_union(defp)
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definition *defp;
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{
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token tok;
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declaration dec;
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case_list *cases;
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case_list **tailp;
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defp->def_kind = DEF_UNION;
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scan(TOK_IDENT, &tok);
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defp->def_name = tok.str;
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scan(TOK_SWITCH, &tok);
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scan(TOK_LPAREN, &tok);
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get_declaration(&dec, DEF_UNION);
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defp->def.un.enum_decl = dec;
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tailp = &defp->def.un.cases;
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scan(TOK_RPAREN, &tok);
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scan(TOK_LBRACE, &tok);
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scan(TOK_CASE, &tok);
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while (tok.kind == TOK_CASE) {
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scan(TOK_IDENT, &tok);
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cases = ALLOC(case_list);
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cases->case_name = tok.str;
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scan(TOK_COLON, &tok);
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get_declaration(&dec, DEF_UNION);
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cases->case_decl = dec;
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*tailp = cases;
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tailp = &cases->next;
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scan(TOK_SEMICOLON, &tok);
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scan3(TOK_CASE, TOK_DEFAULT, TOK_RBRACE, &tok);
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}
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*tailp = NULL;
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if (tok.kind == TOK_DEFAULT) {
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scan(TOK_COLON, &tok);
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get_declaration(&dec, DEF_UNION);
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defp->def.un.default_decl = ALLOC(declaration);
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*defp->def.un.default_decl = dec;
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scan(TOK_SEMICOLON, &tok);
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scan(TOK_RBRACE, &tok);
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} else {
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defp->def.un.default_decl = NULL;
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}
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}
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static
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def_typedef(defp)
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definition *defp;
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{
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declaration dec;
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defp->def_kind = DEF_TYPEDEF;
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get_declaration(&dec, DEF_TYPEDEF);
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defp->def_name = dec.name;
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defp->def.ty.old_prefix = dec.prefix;
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defp->def.ty.old_type = dec.type;
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defp->def.ty.rel = dec.rel;
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defp->def.ty.array_max = dec.array_max;
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}
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static
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get_declaration(dec, dkind)
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declaration *dec;
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defkind dkind;
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{
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token tok;
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get_type(&dec->prefix, &dec->type, dkind);
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dec->rel = REL_ALIAS;
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if (streq(dec->type, "void")) {
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return;
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}
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scan2(TOK_STAR, TOK_IDENT, &tok);
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if (tok.kind == TOK_STAR) {
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dec->rel = REL_POINTER;
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scan(TOK_IDENT, &tok);
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}
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dec->name = tok.str;
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if (peekscan(TOK_LBRACKET, &tok)) {
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if (dec->rel == REL_POINTER) {
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error("no array-of-pointer declarations -- use typedef");
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}
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dec->rel = REL_VECTOR;
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scan_num(&tok);
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dec->array_max = tok.str;
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scan(TOK_RBRACKET, &tok);
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} else if (peekscan(TOK_LANGLE, &tok)) {
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if (dec->rel == REL_POINTER) {
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error("no array-of-pointer declarations -- use typedef");
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}
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dec->rel = REL_ARRAY;
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if (peekscan(TOK_RANGLE, &tok)) {
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dec->array_max = "~0"; /* unspecified size, use max */
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} else {
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scan_num(&tok);
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dec->array_max = tok.str;
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scan(TOK_RANGLE, &tok);
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}
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}
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if (streq(dec->type, "opaque")) {
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if (dec->rel != REL_ARRAY && dec->rel != REL_VECTOR) {
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error("array declaration expected");
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}
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} else if (streq(dec->type, "string")) {
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if (dec->rel != REL_ARRAY) {
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error("variable-length array declaration expected");
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}
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}
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}
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static
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get_type(prefixp, typep, dkind)
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char **prefixp;
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char **typep;
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defkind dkind;
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{
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token tok;
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*prefixp = NULL;
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get_token(&tok);
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switch (tok.kind) {
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case TOK_IDENT:
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*typep = tok.str;
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break;
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case TOK_STRUCT:
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case TOK_ENUM:
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case TOK_UNION:
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*prefixp = tok.str;
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scan(TOK_IDENT, &tok);
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*typep = tok.str;
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break;
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case TOK_UNSIGNED:
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unsigned_dec(typep);
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break;
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case TOK_SHORT:
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*typep = "short";
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(void) peekscan(TOK_INT, &tok);
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break;
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case TOK_LONG:
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*typep = "long";
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(void) peekscan(TOK_INT, &tok);
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break;
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case TOK_VOID:
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if (dkind != DEF_UNION && dkind != DEF_PROGRAM) {
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error("voids allowed only inside union and program definitions");
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}
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*typep = tok.str;
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break;
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case TOK_STRING:
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case TOK_OPAQUE:
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case TOK_CHAR:
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case TOK_INT:
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case TOK_FLOAT:
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case TOK_DOUBLE:
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case TOK_BOOL:
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*typep = tok.str;
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break;
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default:
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error("expected type specifier");
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}
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}
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static
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unsigned_dec(typep)
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char **typep;
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{
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token tok;
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peek(&tok);
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switch (tok.kind) {
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case TOK_CHAR:
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get_token(&tok);
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*typep = "u_char";
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break;
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case TOK_SHORT:
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get_token(&tok);
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*typep = "u_short";
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(void) peekscan(TOK_INT, &tok);
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break;
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case TOK_LONG:
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get_token(&tok);
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*typep = "u_long";
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(void) peekscan(TOK_INT, &tok);
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break;
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case TOK_INT:
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get_token(&tok);
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*typep = "u_int";
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break;
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default:
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*typep = "u_int";
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break;
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}
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}
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