5bdd850968
It's used to treat the "->" access operator as a binary operator and put space characters around it.
674 lines
17 KiB
C
674 lines
17 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1985 Sun Microsystems, Inc.
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* Copyright (c) 1980, 1993
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* The Regents of the University of California. All rights reserved.
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* All rights reserved.
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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
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* are met:
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)lexi.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Here we have the token scanner for indent. It scans off one token and puts
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* it in the global variable "token". It returns a code, indicating the type
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* of token scanned.
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*/
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#include <err.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "indent_globs.h"
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#include "indent_codes.h"
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#include "indent.h"
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#define alphanum 1
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#ifdef undef
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#define opchar 3
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#endif
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struct templ {
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const char *rwd;
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int rwcode;
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};
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/*
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* This table has to be sorted alphabetically, because it'll be used in binary
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* search. For the same reason, string must be the first thing in struct templ.
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*/
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struct templ specials[] =
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{
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{"auto", 10},
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{"break", 9},
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{"case", 8},
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{"char", 4},
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{"const", 4},
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{"default", 8},
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{"do", 6},
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{"double", 4},
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{"else", 6},
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{"enum", 3},
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{"extern", 10},
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{"float", 4},
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{"for", 5},
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{"global", 4},
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{"goto", 9},
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{"if", 5},
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{"int", 4},
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{"long", 4},
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{"offsetof", 1},
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{"register", 10},
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{"return", 9},
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{"short", 4},
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{"sizeof", 2},
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{"static", 10},
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{"struct", 3},
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{"switch", 7},
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{"typedef", 11},
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{"union", 3},
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{"unsigned", 4},
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{"void", 4},
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{"volatile", 4},
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{"while", 5}
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};
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const char **typenames;
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int typename_count;
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int typename_top = -1;
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char chartype[128] =
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{ /* this is used to facilitate the decision of
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* what type (alphanumeric, operator) each
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* character is */
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 3, 0, 0, 1, 3, 3, 0,
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0, 0, 3, 3, 0, 3, 0, 3,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 0, 0, 3, 3, 3, 3,
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0, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 0, 0, 0, 3, 1,
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0, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 0, 3, 0, 3, 0
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};
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static int
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strcmp_type(const void *e1, const void *e2)
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{
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return (strcmp(e1, *(const char * const *)e2));
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}
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int
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lexi(void)
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{
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int unary_delim; /* this is set to 1 if the current token
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* forces a following operator to be unary */
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static int last_code; /* the last token type returned */
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static int l_struct; /* set to 1 if the last token was 'struct' */
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int code; /* internal code to be returned */
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char qchar; /* the delimiter character for a string */
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e_token = s_token; /* point to start of place to save token */
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unary_delim = false;
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ps.col_1 = ps.last_nl; /* tell world that this token started in
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* column 1 iff the last thing scanned was nl */
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ps.last_nl = false;
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while (*buf_ptr == ' ' || *buf_ptr == '\t') { /* get rid of blanks */
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ps.col_1 = false; /* leading blanks imply token is not in column
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* 1 */
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if (++buf_ptr >= buf_end)
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fill_buffer();
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}
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/* Scan an alphanumeric token */
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if (chartype[(int)*buf_ptr] == alphanum || (buf_ptr[0] == '.' && isdigit(buf_ptr[1]))) {
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/*
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* we have a character or number
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*/
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struct templ *p;
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if (isdigit(*buf_ptr) || (buf_ptr[0] == '.' && isdigit(buf_ptr[1]))) {
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enum base {
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BASE_2, BASE_8, BASE_10, BASE_16
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};
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int seendot = 0,
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seenexp = 0,
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seensfx = 0;
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enum base in_base = BASE_10;
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if (*buf_ptr == '0') {
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if (buf_ptr[1] == 'b' || buf_ptr[1] == 'B')
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in_base = BASE_2;
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else if (buf_ptr[1] == 'x' || buf_ptr[1] == 'X')
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in_base = BASE_16;
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else if (isdigit(buf_ptr[1]))
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in_base = BASE_8;
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}
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switch (in_base) {
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case BASE_2:
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*e_token++ = *buf_ptr++;
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*e_token++ = *buf_ptr++;
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while (*buf_ptr == '0' || *buf_ptr == '1') {
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CHECK_SIZE_TOKEN;
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*e_token++ = *buf_ptr++;
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}
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break;
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case BASE_8:
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*e_token++ = *buf_ptr++;
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while (*buf_ptr >= '0' && *buf_ptr <= '8') {
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CHECK_SIZE_TOKEN;
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*e_token++ = *buf_ptr++;
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}
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break;
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case BASE_16:
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*e_token++ = *buf_ptr++;
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*e_token++ = *buf_ptr++;
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while (isxdigit(*buf_ptr)) {
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CHECK_SIZE_TOKEN;
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*e_token++ = *buf_ptr++;
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}
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break;
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case BASE_10:
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while (1) {
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if (*buf_ptr == '.') {
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if (seendot)
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break;
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else
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seendot++;
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}
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CHECK_SIZE_TOKEN;
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*e_token++ = *buf_ptr++;
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if (!isdigit(*buf_ptr) && *buf_ptr != '.') {
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if ((*buf_ptr != 'E' && *buf_ptr != 'e') || seenexp)
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break;
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else {
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seenexp++;
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seendot++;
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CHECK_SIZE_TOKEN;
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*e_token++ = *buf_ptr++;
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if (*buf_ptr == '+' || *buf_ptr == '-')
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*e_token++ = *buf_ptr++;
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}
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}
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}
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break;
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}
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while (1) {
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if (!(seensfx & 1) && (*buf_ptr == 'U' || *buf_ptr == 'u')) {
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CHECK_SIZE_TOKEN;
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*e_token++ = *buf_ptr++;
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seensfx |= 1;
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continue;
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}
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if (!(seensfx & 2) && (strchr("fFlL", *buf_ptr) != NULL)) {
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CHECK_SIZE_TOKEN;
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if (buf_ptr[1] == buf_ptr[0])
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*e_token++ = *buf_ptr++;
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*e_token++ = *buf_ptr++;
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seensfx |= 2;
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continue;
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}
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break;
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}
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}
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else
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while (chartype[(int)*buf_ptr] == alphanum || *buf_ptr == BACKSLASH) {
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/* fill_buffer() terminates buffer with newline */
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if (*buf_ptr == BACKSLASH) {
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if (*(buf_ptr + 1) == '\n') {
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buf_ptr += 2;
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if (buf_ptr >= buf_end)
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fill_buffer();
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} else
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break;
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}
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CHECK_SIZE_TOKEN;
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/* copy it over */
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*e_token++ = *buf_ptr++;
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if (buf_ptr >= buf_end)
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fill_buffer();
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}
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*e_token++ = '\0';
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if (s_token[0] == 'L' && s_token[1] == '\0' &&
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(*buf_ptr == '"' || *buf_ptr == '\''))
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return (strpfx);
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while (*buf_ptr == ' ' || *buf_ptr == '\t') { /* get rid of blanks */
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if (++buf_ptr >= buf_end)
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fill_buffer();
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}
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ps.keyword = 0;
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if (l_struct && !ps.p_l_follow) {
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/* if last token was 'struct' and we're not
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* in parentheses, then this token
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* should be treated as a declaration */
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l_struct = false;
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last_code = ident;
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ps.last_u_d = true;
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return (decl);
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}
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ps.last_u_d = l_struct; /* Operator after identifier is binary
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* unless last token was 'struct' */
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l_struct = false;
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last_code = ident; /* Remember that this is the code we will
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* return */
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p = bsearch(s_token,
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specials,
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sizeof(specials) / sizeof(specials[0]),
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sizeof(specials[0]),
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strcmp_type);
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if (p == NULL) { /* not a special keyword... */
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char *u;
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/* ... so maybe a type_t or a typedef */
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if ((auto_typedefs && ((u = strrchr(s_token, '_')) != NULL) &&
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strcmp(u, "_t") == 0) || (typename_top >= 0 &&
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bsearch(s_token, typenames, typename_top + 1,
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sizeof(typenames[0]), strcmp_type))) {
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ps.keyword = 4; /* a type name */
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ps.last_u_d = true;
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goto found_typename;
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}
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} else { /* we have a keyword */
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ps.keyword = p->rwcode;
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ps.last_u_d = true;
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switch (p->rwcode) {
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case 7: /* it is a switch */
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return (swstmt);
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case 8: /* a case or default */
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return (casestmt);
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case 3: /* a "struct" */
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/*
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* Next time around, we will want to know that we have had a
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* 'struct'
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*/
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l_struct = true;
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/* FALLTHROUGH */
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case 4: /* one of the declaration keywords */
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found_typename:
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if (ps.p_l_follow) {
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/* inside parens: cast, param list, offsetof or sizeof */
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ps.cast_mask |= (1 << ps.p_l_follow) & ~ps.not_cast_mask;
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break;
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}
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last_code = decl;
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return (decl);
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case 5: /* if, while, for */
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return (sp_paren);
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case 6: /* do, else */
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return (sp_nparen);
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case 10: /* storage class specifier */
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return (storage);
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case 11: /* typedef */
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return (type_def);
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default: /* all others are treated like any other
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* identifier */
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return (ident);
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} /* end of switch */
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} /* end of if (found_it) */
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if (*buf_ptr == '(' && ps.tos <= 1 && ps.ind_level == 0 &&
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ps.in_parameter_declaration == 0 && ps.block_init == 0) {
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char *tp = buf_ptr;
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while (tp < buf_end)
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if (*tp++ == ')' && (*tp == ';' || *tp == ','))
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goto not_proc;
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strncpy(ps.procname, token, sizeof ps.procname - 1);
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if (ps.in_decl)
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ps.in_parameter_declaration = 1;
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return (last_code = funcname);
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not_proc:;
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}
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/*
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* The following hack attempts to guess whether or not the current
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* token is in fact a declaration keyword -- one that has been
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* typedefd
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*/
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if (((*buf_ptr == '*' && buf_ptr[1] != '=') || isalpha(*buf_ptr) || *buf_ptr == '_')
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&& !ps.p_l_follow
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&& !ps.block_init
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&& (ps.last_token == rparen || ps.last_token == semicolon ||
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ps.last_token == decl ||
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ps.last_token == lbrace || ps.last_token == rbrace)) {
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ps.keyword = 4; /* a type name */
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ps.last_u_d = true;
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last_code = decl;
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return decl;
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}
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if (last_code == decl) /* if this is a declared variable, then
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* following sign is unary */
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ps.last_u_d = true; /* will make "int a -1" work */
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last_code = ident;
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return (ident); /* the ident is not in the list */
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} /* end of procesing for alpanum character */
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/* Scan a non-alphanumeric token */
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*e_token++ = *buf_ptr; /* if it is only a one-character token, it is
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* moved here */
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*e_token = '\0';
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if (++buf_ptr >= buf_end)
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fill_buffer();
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switch (*token) {
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case '\n':
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unary_delim = ps.last_u_d;
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ps.last_nl = true; /* remember that we just had a newline */
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code = (had_eof ? 0 : newline);
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/*
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* if data has been exhausted, the newline is a dummy, and we should
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* return code to stop
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*/
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break;
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case '\'': /* start of quoted character */
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case '"': /* start of string */
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qchar = *token;
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if (troff) {
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e_token[-1] = '`';
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if (qchar == '"')
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*e_token++ = '`';
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e_token = chfont(&bodyf, &stringf, e_token);
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}
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do { /* copy the string */
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while (1) { /* move one character or [/<char>]<char> */
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if (*buf_ptr == '\n') {
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diag2(1, "Unterminated literal");
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goto stop_lit;
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}
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CHECK_SIZE_TOKEN; /* Only have to do this once in this loop,
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* since CHECK_SIZE guarantees that there
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* are at least 5 entries left */
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*e_token = *buf_ptr++;
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if (buf_ptr >= buf_end)
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fill_buffer();
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if (*e_token == BACKSLASH) { /* if escape, copy extra char */
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if (*buf_ptr == '\n') /* check for escaped newline */
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++line_no;
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if (troff) {
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*++e_token = BACKSLASH;
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if (*buf_ptr == BACKSLASH)
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*++e_token = BACKSLASH;
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}
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*++e_token = *buf_ptr++;
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++e_token; /* we must increment this again because we
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* copied two chars */
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if (buf_ptr >= buf_end)
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fill_buffer();
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}
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else
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break; /* we copied one character */
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} /* end of while (1) */
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} while (*e_token++ != qchar);
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if (troff) {
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e_token = chfont(&stringf, &bodyf, e_token - 1);
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if (qchar == '"')
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*e_token++ = '\'';
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}
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stop_lit:
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code = ident;
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break;
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case ('('):
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case ('['):
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unary_delim = true;
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code = lparen;
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break;
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case (')'):
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case (']'):
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code = rparen;
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break;
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case '#':
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unary_delim = ps.last_u_d;
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code = preesc;
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break;
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case '?':
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unary_delim = true;
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code = question;
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break;
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case (':'):
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code = colon;
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unary_delim = true;
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break;
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case (';'):
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unary_delim = true;
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code = semicolon;
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break;
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case ('{'):
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unary_delim = true;
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/*
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* if (ps.in_or_st) ps.block_init = 1;
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*/
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/* ? code = ps.block_init ? lparen : lbrace; */
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code = lbrace;
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break;
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case ('}'):
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unary_delim = true;
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/* ? code = ps.block_init ? rparen : rbrace; */
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code = rbrace;
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break;
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case 014: /* a form feed */
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unary_delim = ps.last_u_d;
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ps.last_nl = true; /* remember this so we can set 'ps.col_1'
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* right */
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code = form_feed;
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break;
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case (','):
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unary_delim = true;
|
|
code = comma;
|
|
break;
|
|
|
|
case '.':
|
|
unary_delim = false;
|
|
code = period;
|
|
break;
|
|
|
|
case '-':
|
|
case '+': /* check for -, +, --, ++ */
|
|
code = (ps.last_u_d ? unary_op : binary_op);
|
|
unary_delim = true;
|
|
|
|
if (*buf_ptr == token[0]) {
|
|
/* check for doubled character */
|
|
*e_token++ = *buf_ptr++;
|
|
/* buffer overflow will be checked at end of loop */
|
|
if (last_code == ident || last_code == rparen) {
|
|
code = (ps.last_u_d ? unary_op : postop);
|
|
/* check for following ++ or -- */
|
|
unary_delim = false;
|
|
}
|
|
}
|
|
else if (*buf_ptr == '=')
|
|
/* check for operator += */
|
|
*e_token++ = *buf_ptr++;
|
|
else if (*buf_ptr == '>') {
|
|
/* check for operator -> */
|
|
*e_token++ = *buf_ptr++;
|
|
unary_delim = false;
|
|
code = unary_op;
|
|
ps.want_blank = false;
|
|
}
|
|
break; /* buffer overflow will be checked at end of
|
|
* switch */
|
|
|
|
case '=':
|
|
if (ps.in_or_st)
|
|
ps.block_init = 1;
|
|
#ifdef undef
|
|
if (chartype[*buf_ptr] == opchar) { /* we have two char assignment */
|
|
e_token[-1] = *buf_ptr++;
|
|
if ((e_token[-1] == '<' || e_token[-1] == '>') && e_token[-1] == *buf_ptr)
|
|
*e_token++ = *buf_ptr++;
|
|
*e_token++ = '='; /* Flip =+ to += */
|
|
*e_token = 0;
|
|
}
|
|
#else
|
|
if (*buf_ptr == '=') {/* == */
|
|
*e_token++ = '='; /* Flip =+ to += */
|
|
buf_ptr++;
|
|
*e_token = 0;
|
|
}
|
|
#endif
|
|
code = binary_op;
|
|
unary_delim = true;
|
|
break;
|
|
/* can drop thru!!! */
|
|
|
|
case '>':
|
|
case '<':
|
|
case '!': /* ops like <, <<, <=, !=, etc */
|
|
if (*buf_ptr == '>' || *buf_ptr == '<' || *buf_ptr == '=') {
|
|
*e_token++ = *buf_ptr;
|
|
if (++buf_ptr >= buf_end)
|
|
fill_buffer();
|
|
}
|
|
if (*buf_ptr == '=')
|
|
*e_token++ = *buf_ptr++;
|
|
code = (ps.last_u_d ? unary_op : binary_op);
|
|
unary_delim = true;
|
|
break;
|
|
|
|
default:
|
|
if (token[0] == '/' && *buf_ptr == '*') {
|
|
/* it is start of comment */
|
|
*e_token++ = '*';
|
|
|
|
if (++buf_ptr >= buf_end)
|
|
fill_buffer();
|
|
|
|
code = comment;
|
|
unary_delim = ps.last_u_d;
|
|
break;
|
|
}
|
|
while (*(e_token - 1) == *buf_ptr || *buf_ptr == '=') {
|
|
/*
|
|
* handle ||, &&, etc, and also things as in int *****i
|
|
*/
|
|
*e_token++ = *buf_ptr;
|
|
if (++buf_ptr >= buf_end)
|
|
fill_buffer();
|
|
}
|
|
code = (ps.last_u_d ? unary_op : binary_op);
|
|
unary_delim = true;
|
|
|
|
|
|
} /* end of switch */
|
|
if (code != newline) {
|
|
l_struct = false;
|
|
last_code = code;
|
|
}
|
|
if (buf_ptr >= buf_end) /* check for input buffer empty */
|
|
fill_buffer();
|
|
ps.last_u_d = unary_delim;
|
|
*e_token = '\0'; /* null terminate the token */
|
|
return (code);
|
|
}
|
|
|
|
void
|
|
alloc_typenames(void)
|
|
{
|
|
|
|
typenames = (const char **)malloc(sizeof(typenames[0]) *
|
|
(typename_count = 16));
|
|
if (typenames == NULL)
|
|
err(1, NULL);
|
|
}
|
|
|
|
void
|
|
add_typename(const char *key)
|
|
{
|
|
int comparison;
|
|
const char *copy;
|
|
|
|
if (typename_top + 1 >= typename_count) {
|
|
typenames = realloc((void *)typenames,
|
|
sizeof(typenames[0]) * (typename_count *= 2));
|
|
if (typenames == NULL)
|
|
err(1, NULL);
|
|
}
|
|
if (typename_top == -1)
|
|
typenames[++typename_top] = copy = strdup(key);
|
|
else if ((comparison = strcmp(key, typenames[typename_top])) >= 0) {
|
|
/* take advantage of sorted input */
|
|
if (comparison == 0) /* remove duplicates */
|
|
return;
|
|
typenames[++typename_top] = copy = strdup(key);
|
|
}
|
|
else {
|
|
int p;
|
|
|
|
for (p = 0; (comparison = strcmp(key, typenames[p])) > 0; p++)
|
|
/* find place for the new key */;
|
|
if (comparison == 0) /* remove duplicates */
|
|
return;
|
|
memmove(&typenames[p + 1], &typenames[p],
|
|
sizeof(typenames[0]) * (++typename_top - p));
|
|
typenames[p] = copy = strdup(key);
|
|
}
|
|
|
|
if (copy == NULL)
|
|
err(1, NULL);
|
|
}
|