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544 lines
10 KiB
C
544 lines
10 KiB
C
/*
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* From: @(#)rpc_scan.c 1.11 89/02/22 (C) 1987 SMI
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* * Neither the name of Sun Microsystems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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 <string.h>
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#include <libintl.h>
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#include "rpc_scan.h"
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#include "rpc_parse.h"
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#include "rpc_util.h"
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#include "proto.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 void unget_token (token * tokp);
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static void findstrconst (const char **str, const char **val);
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static void findchrconst (const char **str, const char **val);
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static void findconst (const char **str, const char **val);
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static void findkind (const char **mark, token * tokp);
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static int cppline (const char *line);
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static int directive (const char *line);
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static void printdirective (const char *line);
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static void docppline (const char *line, int *lineno, const char **fname);
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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 (tok_kind expect, 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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* scan expecting any of the 2 given tokens
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*/
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void
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scan2 (tok_kind expect1, tok_kind expect2, 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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{
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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 any of the 3 given token
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*/
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void
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scan3 (tok_kind expect1, tok_kind expect2, tok_kind expect3, 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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{
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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 (token *tokp)
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{
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get_token (tokp);
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switch (tokp->kind)
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{
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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 (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 (tok_kind expect, token *tokp)
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{
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peek (tokp);
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if (tokp->kind == expect)
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{
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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 (token *tokp)
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{
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int commenting;
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if (pushed)
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{
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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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{
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if (*where == 0)
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{
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for (;;)
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{
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if (!fgets (curline, MAXLINESIZE, fin))
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{
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tokp->kind = TOK_EOF;
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*curline = 0;
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where = curline;
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return;
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}
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linenum++;
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if (commenting)
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{
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break;
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}
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else if (cppline (curline))
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{
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docppline (curline, &linenum,
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&infilename);
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}
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else if (directive (curline))
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{
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printdirective (curline);
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}
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else
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{
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break;
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}
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}
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where = curline;
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}
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else if (isspace (*where))
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{
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while (isspace (*where))
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{
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where++; /* eat */
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}
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}
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else if (commenting)
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{
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for (where++; *where; where++)
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{
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if (endcomment (where))
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{
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where++;
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commenting--;
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break;
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}
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}
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}
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else if (startcomment (where))
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{
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where += 2;
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commenting++;
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}
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else
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{
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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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{
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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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tokp->kind = TOK_CHARCONST;
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findchrconst (&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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{
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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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{
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s_print (p, "%c", *where);
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}
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else
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{
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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 void
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unget_token (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 void
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findstrconst (const char **str, const char **val)
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{
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const char *p;
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char *tmp;
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int size;
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p = *str;
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do
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{
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p++;
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}
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while (*p && *p != '"');
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if (*p == 0)
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{
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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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tmp = alloc (size + 1);
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strncpy (tmp, *str, size);
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tmp[size] = 0;
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*val = tmp;
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*str = p;
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}
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static void
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findchrconst (const char **str, const char **val)
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{
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const char *p;
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char *tmp;
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int size;
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p = *str;
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do
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{
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p++;
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}
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while (*p && *p != '\'');
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if (*p == 0)
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{
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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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if (size != 3)
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{
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error (_("empty char string"));
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}
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tmp = alloc (size + 1);
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strncpy (tmp, *str, size);
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tmp[size] = 0;
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*val = tmp;
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*str = p;
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}
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static void
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findconst (const char **str, const char **val)
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{
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const char *p;
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char *tmp;
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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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{
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p++;
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do
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{
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p++;
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}
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while (isxdigit (*p));
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}
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else
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{
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do
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{
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p++;
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}
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while (isdigit (*p));
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}
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size = p - *str;
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tmp = alloc (size + 1);
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strncpy (tmp, *str, size);
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tmp[size] = 0;
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*val = tmp;
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*str = p;
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}
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static const token symbols[] =
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{
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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_HYPER, "hyper"},
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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 void
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findkind (const char **mark, token *tokp)
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{
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int len;
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const token *s;
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const char *str;
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char *tmp;
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str = *mark;
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for (s = symbols; s->kind != TOK_EOF; s++)
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{
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len = strlen (s->str);
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if (strncmp (str, s->str, len) == 0)
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{
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if (!isalnum (str[len]) && str[len] != '_')
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{
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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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tmp = alloc (len + 1);
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strncpy (tmp, str, len);
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tmp[len] = 0;
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tokp->str = tmp;
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*mark = str + len;
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}
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static int
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cppline (const char *line)
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{
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return line == curline && *line == '#';
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}
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static int
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directive (const char *line)
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{
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return line == curline && *line == '%';
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}
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static void
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printdirective (const 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 void
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docppline (const char *line, int *lineno, const 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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{
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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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{
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line++;
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}
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while (isspace (*line))
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{
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line++;
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}
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if (*line != '"')
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{
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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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{
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*p++ = *line++;
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}
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if (*line == 0)
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{
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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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{
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free (file);
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*fname = NULL;
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}
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else
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{
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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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