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477 lines
8.3 KiB
C
477 lines
8.3 KiB
C
/* @(#)rpc_scan.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_scan.c 1.6 87/06/24 (C) 1987 SMI";*/
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static char rcsid[] = "$Id: rpc_scan.c,v 1.1 1993/09/13 23:20:18 jtc Exp $";
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#endif
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/*
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* rpc_scan.c, Scanner 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 <ctype.h>
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#include <strings.h>
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#include "rpc_scan.h"
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#include "rpc_util.h"
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#define startcomment(where) (where[0] == '/' && where[1] == '*')
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#define endcomment(where) (where[-1] == '*' && where[0] == '/')
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static int pushed = 0; /* is a token pushed */
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static token lasttok; /* last token, if pushed */
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static int unget_token(), findstrconst(), findconst(), findkind(), cppline(),
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directive(), printdirective(), docppline();
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/*
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* scan expecting 1 given token
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*/
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void
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scan(expect, tokp)
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tok_kind expect;
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token *tokp;
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{
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get_token(tokp);
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if (tokp->kind != expect) {
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expected1(expect);
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}
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}
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/*
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* scan expecting 2 given tokens
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*/
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void
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scan2(expect1, expect2, tokp)
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tok_kind expect1;
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tok_kind expect2;
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token *tokp;
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{
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get_token(tokp);
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if (tokp->kind != expect1 && tokp->kind != expect2) {
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expected2(expect1, expect2);
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}
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}
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/*
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* scan expecting 3 given token
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*/
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void
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scan3(expect1, expect2, expect3, tokp)
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tok_kind expect1;
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tok_kind expect2;
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tok_kind expect3;
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token *tokp;
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{
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get_token(tokp);
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if (tokp->kind != expect1 && tokp->kind != expect2
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&& tokp->kind != expect3) {
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expected3(expect1, expect2, expect3);
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}
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}
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/*
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* scan expecting a constant, possibly symbolic
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*/
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void
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scan_num(tokp)
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token *tokp;
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{
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get_token(tokp);
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switch (tokp->kind) {
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case TOK_IDENT:
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break;
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default:
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error("constant or identifier expected");
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}
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}
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/*
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* Peek at the next token
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*/
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void
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peek(tokp)
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token *tokp;
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{
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get_token(tokp);
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unget_token(tokp);
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}
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/*
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* Peek at the next token and scan it if it matches what you expect
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*/
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int
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peekscan(expect, tokp)
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tok_kind expect;
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token *tokp;
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{
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peek(tokp);
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if (tokp->kind == expect) {
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get_token(tokp);
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return (1);
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}
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return (0);
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}
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/*
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* Get the next token, printing out any directive that are encountered.
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*/
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void
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get_token(tokp)
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token *tokp;
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{
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int commenting;
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if (pushed) {
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pushed = 0;
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*tokp = lasttok;
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return;
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}
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commenting = 0;
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for (;;) {
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if (*where == 0) {
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for (;;) {
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if (!fgets(curline, MAXLINESIZE, fin)) {
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tokp->kind = TOK_EOF;
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*where = 0;
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return;
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}
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linenum++;
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if (commenting) {
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break;
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} else if (cppline(curline)) {
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docppline(curline, &linenum,
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&infilename);
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} else if (directive(curline)) {
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printdirective(curline);
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} else {
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break;
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}
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}
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where = curline;
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} else if (isspace(*where)) {
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while (isspace(*where)) {
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where++; /* eat */
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}
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} else if (commenting) {
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where++;
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if (endcomment(where)) {
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where++;
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commenting--;
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}
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} else if (startcomment(where)) {
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where += 2;
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commenting++;
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} else {
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break;
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}
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}
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/*
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* 'where' is not whitespace, comment or directive Must be a token!
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*/
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switch (*where) {
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case ':':
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tokp->kind = TOK_COLON;
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where++;
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break;
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case ';':
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tokp->kind = TOK_SEMICOLON;
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where++;
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break;
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case ',':
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tokp->kind = TOK_COMMA;
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where++;
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break;
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case '=':
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tokp->kind = TOK_EQUAL;
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where++;
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break;
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case '*':
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tokp->kind = TOK_STAR;
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where++;
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break;
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case '[':
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tokp->kind = TOK_LBRACKET;
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where++;
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break;
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case ']':
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tokp->kind = TOK_RBRACKET;
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where++;
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break;
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case '{':
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tokp->kind = TOK_LBRACE;
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where++;
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break;
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case '}':
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tokp->kind = TOK_RBRACE;
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where++;
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break;
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case '(':
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tokp->kind = TOK_LPAREN;
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where++;
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break;
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case ')':
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tokp->kind = TOK_RPAREN;
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where++;
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break;
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case '<':
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tokp->kind = TOK_LANGLE;
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where++;
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break;
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case '>':
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tokp->kind = TOK_RANGLE;
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where++;
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break;
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case '"':
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tokp->kind = TOK_STRCONST;
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findstrconst(&where, &tokp->str);
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break;
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case '-':
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case '0':
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case '1':
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case '2':
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case '3':
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case '4':
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case '5':
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case '6':
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case '7':
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case '8':
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case '9':
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tokp->kind = TOK_IDENT;
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findconst(&where, &tokp->str);
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break;
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default:
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if (!(isalpha(*where) || *where == '_')) {
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char buf[100];
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char *p;
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s_print(buf, "illegal character in file: ");
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p = buf + strlen(buf);
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if (isprint(*where)) {
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s_print(p, "%c", *where);
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} else {
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s_print(p, "%d", *where);
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}
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error(buf);
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}
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findkind(&where, tokp);
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break;
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}
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}
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static
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unget_token(tokp)
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token *tokp;
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{
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lasttok = *tokp;
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pushed = 1;
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}
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static
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findstrconst(str, val)
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char **str;
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char **val;
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{
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char *p;
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int size;
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p = *str;
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do {
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*p++;
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} while (*p && *p != '"');
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if (*p == 0) {
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error("unterminated string constant");
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}
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p++;
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size = p - *str;
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*val = alloc(size + 1);
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(void) strncpy(*val, *str, size);
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(*val)[size] = 0;
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*str = p;
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}
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static
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findconst(str, val)
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char **str;
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char **val;
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{
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char *p;
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int size;
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p = *str;
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if (*p == '0' && *(p + 1) == 'x') {
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p++;
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do {
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p++;
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} while (isxdigit(*p));
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} else {
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do {
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p++;
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} while (isdigit(*p));
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}
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size = p - *str;
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*val = alloc(size + 1);
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(void) strncpy(*val, *str, size);
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(*val)[size] = 0;
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*str = p;
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}
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static token symbols[] = {
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{TOK_CONST, "const"},
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{TOK_UNION, "union"},
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{TOK_SWITCH, "switch"},
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{TOK_CASE, "case"},
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{TOK_DEFAULT, "default"},
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{TOK_STRUCT, "struct"},
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{TOK_TYPEDEF, "typedef"},
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{TOK_ENUM, "enum"},
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{TOK_OPAQUE, "opaque"},
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{TOK_BOOL, "bool"},
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{TOK_VOID, "void"},
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{TOK_CHAR, "char"},
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{TOK_INT, "int"},
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{TOK_UNSIGNED, "unsigned"},
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{TOK_SHORT, "short"},
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{TOK_LONG, "long"},
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{TOK_FLOAT, "float"},
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{TOK_DOUBLE, "double"},
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{TOK_STRING, "string"},
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{TOK_PROGRAM, "program"},
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{TOK_VERSION, "version"},
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{TOK_EOF, "??????"},
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};
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static
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findkind(mark, tokp)
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char **mark;
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token *tokp;
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{
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int len;
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token *s;
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char *str;
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str = *mark;
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for (s = symbols; s->kind != TOK_EOF; s++) {
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len = strlen(s->str);
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if (strncmp(str, s->str, len) == 0) {
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if (!isalnum(str[len]) && str[len] != '_') {
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tokp->kind = s->kind;
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tokp->str = s->str;
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*mark = str + len;
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return;
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}
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}
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}
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tokp->kind = TOK_IDENT;
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for (len = 0; isalnum(str[len]) || str[len] == '_'; len++);
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tokp->str = alloc(len + 1);
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(void) strncpy(tokp->str, str, len);
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tokp->str[len] = 0;
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*mark = str + len;
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}
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static
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cppline(line)
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char *line;
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{
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return (line == curline && *line == '#');
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}
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static
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directive(line)
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char *line;
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{
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return (line == curline && *line == '%');
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}
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static
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printdirective(line)
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char *line;
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{
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f_print(fout, "%s", line + 1);
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}
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static
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docppline(line, lineno, fname)
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char *line;
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int *lineno;
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char **fname;
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{
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char *file;
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int num;
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char *p;
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line++;
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while (isspace(*line)) {
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line++;
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}
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num = atoi(line);
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while (isdigit(*line)) {
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line++;
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}
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while (isspace(*line)) {
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line++;
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}
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if (*line != '"') {
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error("preprocessor error");
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}
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line++;
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p = file = alloc(strlen(line) + 1);
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while (*line && *line != '"') {
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*p++ = *line++;
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}
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if (*line == 0) {
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error("preprocessor error");
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}
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*p = 0;
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if (*file == 0) {
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*fname = NULL;
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} else {
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*fname = file;
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}
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*lineno = num - 1;
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}
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