63c3f22696
lexi() reads the input stream and categorizes the next token. indent will sometimes buffer up a sequence of tokens in order rearrange them. That is needed for properly cuddling else or placing braces correctly according to the chosen style (KNF vs Allman) when comments are around. The loop that buffers tokens up uses lexi() to decide if it's time to stop buffering. Then the temporary buffer is used to feed lexi() the same tokens again, this time for normal processing. The problem is that lexi() apart from recognizing the token, can change a lot of information about the current state, for example ps.last_nl, ps.keyword, buf_ptr. It also abandons leading whitespace, which is needed mainly for comment-related considerations. So the call to lexi() while tokens are buffered up and categorized can change the state before they're read again for normal processing which may easily result in changing interpretation of the current state and lead to incorrect output. To work around the problems: 1) copy the whitespace into the save_com buffer so that it will be read again when processed 2) trick lexi() into modifying a temporary copy of the parser state instead of the original.
52 lines
2.0 KiB
C
52 lines
2.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2001 Jens Schweikhardt
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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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__FBSDID("$FreeBSD$");
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#endif
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void add_typename(const char *);
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void alloc_typenames(void);
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int compute_code_target(void);
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int compute_label_target(void);
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int count_spaces(int, char *);
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int count_spaces_until(int, char *, char *);
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int lexi(struct parser_state *);
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void diag2(int, const char *);
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void diag3(int, const char *, int);
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void diag4(int, const char *, int, int);
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void dump_line(void);
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void fill_buffer(void);
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void parse(int);
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void parsefont(struct fstate *, const char *);
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void pr_comment(void);
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void set_defaults(void);
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void set_option(char *);
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void set_profile(const char *);
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void writefdef(struct fstate *f, int);
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