| 1 | #! /usr/bin/env perl
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| 2 | #
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| 3 | # Copyright 2020-2023 The OpenSSL Project Authors. All Rights Reserved.
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| 4 | # Copyright Siemens AG 2019-2022
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| 5 | #
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| 6 | # Licensed under the Apache License 2.0 (the "License").
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| 7 | # You may not use this file except in compliance with the License.
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| 8 | # You can obtain a copy in the file LICENSE in the source distribution
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| 9 | # or at https://www.openssl.org/source/license.html
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| 10 | #
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| 11 | # check-format.pl
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| 12 | # - check formatting of C source according to OpenSSL coding style
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| 13 | #
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| 14 | # usage:
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| 15 | # check-format.pl [-l|--sloppy-len] [-l|--sloppy-bodylen]
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| 16 | # [-s|--sloppy-space] [-c|--sloppy-comment]
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| 17 | # [-m|--sloppy-macro] [-h|--sloppy-hang]
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| 18 | # [-e|--eol-comment] [-1|--1-stmt]
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| 19 | # <files>
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| 20 | #
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| 21 | # run self-tests:
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| 22 | # util/check-format.pl util/check-format-test-positives.c
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| 23 | # util/check-format.pl util/check-format-test-negatives.c
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| 24 | #
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| 25 | # checks adherence to the formatting rules of the OpenSSL coding guidelines
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| 26 | # assuming that the input files contain syntactically correct C code.
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| 27 | # This pragmatic tool is incomplete and yields some false positives.
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| 28 | # Still it should be useful for detecting most typical glitches.
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| 29 | #
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| 30 | # options:
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| 31 | # -l | --sloppy-len increase accepted max line length from 80 to 84
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| 32 | # -l | --sloppy-bodylen do not report function body length > 200
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| 33 | # -s | --sloppy-space do not report whitespace nits
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| 34 | # -c | --sloppy-comment do not report indentation of comments
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| 35 | # Otherwise for each multi-line comment the indentation of
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| 36 | # its lines is checked for consistency. For each comment
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| 37 | # that does not begin to the right of normal code its
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| 38 | # indentation must be as for normal code, while in case it
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| 39 | # also has no normal code to its right it is considered to
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| 40 | # refer to the following line and may be indented equally.
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| 41 | # -m | --sloppy-macro allow missing extra indentation of macro bodies
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| 42 | # -h | --sloppy-hang when checking hanging indentation, do not report
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| 43 | # * same indentation as on line before
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| 44 | # * same indentation as non-hanging indent level
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| 45 | # * indentation moved left (not beyond non-hanging indent)
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| 46 | # just to fit contents within the line length limit
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| 47 | # -e | --eol-comment report needless intermediate multiple consecutive spaces also before end-of-line comments
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| 48 | # -1 | --1-stmt do more aggressive checks for { 1 stmt } - see below
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| 49 | #
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| 50 | # There are non-trivial false positives and negatives such as the following.
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| 51 | #
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| 52 | # * When a line contains several issues of the same kind only one is reported.
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| 53 | #
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| 54 | # * When a line contains more than one statement this is (correctly) reported
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| 55 | # but in some situations the indentation checks for subsequent lines go wrong.
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| 56 | #
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| 57 | # * There is the special OpenSSL rule not to unnecessarily use braces around
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| 58 | # single statements:
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| 59 | # {
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| 60 | # stmt;
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| 61 | # }
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| 62 | # except within if ... else constructs where some branch contains more than one
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| 63 | # statement. Since the exception is hard to recognize when such branches occur
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| 64 | # after the current position (such that false positives would be reported)
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| 65 | # the tool by checks for this rule by default only for do/while/for bodies.
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| 66 | # Yet with the --1-stmt option false positives are preferred over negatives.
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| 67 | # False negatives occur if the braces are more than two non-blank lines apart.
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| 68 | #
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| 69 | # * The presence of multiple consecutive spaces is regarded a coding style nit
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| 70 | # except when this is before end-of-line comments (unless the --eol-comment is given) and
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| 71 | # except when done in order to align certain columns over multiple lines, e.g.:
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| 72 | # # define AB 1
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| 73 | # # define CDE 22
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| 74 | # # define F 3333
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| 75 | # This pattern is recognized - and consequently extra space not reported -
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| 76 | # for a given line if in the non-blank line before or after (if existing)
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| 77 | # for each occurrence of " \S" (where \S means non-space) in the given line
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| 78 | # there is " \S" in the other line in the respective column position.
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| 79 | # This may lead to both false negatives (in case of coincidental " \S")
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| 80 | # and false positives (in case of more complex multi-column alignment).
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| 81 | #
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| 82 | # * When just part of control structures depend on #if(n)(def), which can be
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| 83 | # considered bad programming style, indentation false positives occur, e.g.:
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| 84 | # #if X
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| 85 | # if (1) /* bad style */
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| 86 | # #else
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| 87 | # if (2) /* bad style resulting in false positive */
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| 88 | # #endif
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| 89 | # c; /* resulting further false positive */
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| 90 |
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| 91 | use strict;
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| 92 | # use List::Util qw[min max];
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| 93 | use POSIX;
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| 94 |
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| 95 | use constant INDENT_LEVEL => 4;
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| 96 | use constant MAX_LINE_LENGTH => 80;
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| 97 | use constant MAX_BODY_LENGTH => 200;
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| 98 |
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| 99 | # global variables @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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| 100 |
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| 101 | # command-line options
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| 102 | my $max_length = MAX_LINE_LENGTH;
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| 103 | my $sloppy_bodylen = 0;
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| 104 | my $sloppy_SPC = 0;
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| 105 | my $sloppy_hang = 0;
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| 106 | my $sloppy_cmt = 0;
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| 107 | my $sloppy_macro = 0;
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| 108 | my $eol_cmt = 0;
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| 109 | my $extended_1_stmt = 0;
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| 110 |
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| 111 | while ($ARGV[0] =~ m/^-(\w|-[\w\-]+)$/) {
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| 112 | my $arg = $1; shift;
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| 113 | if ($arg =~ m/^(l|-sloppy-len)$/) {
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| 114 | $max_length += INDENT_LEVEL;
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| 115 | } elsif ($arg =~ m/^(b|-sloppy-bodylen)$/) {
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| 116 | $sloppy_bodylen = 1;
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| 117 | } elsif ($arg =~ m/^(s|-sloppy-space)$/) {
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| 118 | $sloppy_SPC= 1;
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| 119 | } elsif ($arg =~ m/^(c|-sloppy-comment)$/) {
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| 120 | $sloppy_cmt = 1;
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| 121 | } elsif ($arg =~ m/^(m|-sloppy-macro)$/) {
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| 122 | $sloppy_macro = 1;
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| 123 | } elsif ($arg =~ m/^(h|-sloppy-hang)$/) {
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| 124 | $sloppy_hang = 1;
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| 125 | } elsif ($arg =~ m/^(e|-eol-comment)$/) {
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| 126 | $eol_cmt = 1;
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| 127 | } elsif ($arg =~ m/^(1|-1-stmt)$/) {
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| 128 | $extended_1_stmt = 1;
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| 129 | } else {
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| 130 | die("unknown option: -$arg");
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| 131 | }
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| 132 | }
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| 133 |
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| 134 | # state variables
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| 135 | my $self_test; # whether the current input file is regarded to contain (positive/negative) self-tests
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| 136 |
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| 137 | my $in_comment; # number of lines so far within multi-line comment, 0 if no comment, < 0 when end is on current line
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| 138 | my $leading_comment; # multi-line comment has no code before its beginning delimiter, if $in_comment != 0
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| 139 | my $formatted_comment; # multi-line comment beginning with "/*-", which indicates/allows special formatting, if $in_comment != 0
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| 140 | my $comment_indent; # comment indent, if $in_comment != 0
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| 141 |
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| 142 | my $ifdef__cplusplus; # line before contained '#ifdef __cplusplus' (used in header files)
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| 143 | my $preproc_if_nesting; # currently required indentation of preprocessor directive according to #if(n)(def)
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| 144 | my $in_preproc; # 0 or number of lines so far within preprocessor directive, e.g., macro definition
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| 145 | my $preproc_directive; # name of current preprocessor directive, if $in_preproc != 0
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| 146 | my $preproc_offset; # offset to $block_indent within multi-line preprocessor directive, else 0
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| 147 | my $in_macro_header; # number of open parentheses + 1 in (multi-line) header of #define, if $in_preproc != 0
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| 148 |
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| 149 | my $line; # current line number
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| 150 | my $line_before; # number of previous not essentially blank line (containing at most whitespace and '\')
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| 151 | my $line_before2; # number of not essentially blank line before previous not essentially blank line
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| 152 |
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| 153 | # indentation state
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| 154 | my $contents; # contents of current line (without blinding)
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| 155 | # $_ # current line, where comments etc. get blinded
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| 156 | my $code_contents_before; # contents of previous non-comment non-preprocessor-directive line (without blinding), initially ""
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| 157 | my $contents_before; # contents of $line_before (without blinding), if $line_before > 0
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| 158 | my $contents_before_; # contents of $line_before after blinding comments etc., if $line_before > 0
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| 159 | my $contents_before2; # contents of $line_before2 (without blinding), if $line_before2 > 0
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| 160 | my $contents_before_2; # contents of $line_before2 after blinding comments etc., if $line_before2 > 0
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| 161 | my $in_multiline_string; # line starts within multi-line string literal
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| 162 | my $count; # -1 or number of leading whitespace characters (except newline) in current line,
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| 163 | # which should be $block_indent + $hanging_offset + $local_offset or $expr_indent
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| 164 | my $count_before; # number of leading whitespace characters (except line ending chars) in $contents_before
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| 165 | my $has_label; # current line contains label
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| 166 | my $local_offset; # current extra indent due to label, switch case/default, or leading closing brace(s)
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| 167 | my $line_body_start; # number of line where last function body started, or 0
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| 168 | my $line_function_start; # number of line where last function definition started, used for $line_body_start
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| 169 | my $last_function_header; # header containing name of last function defined, used if $line_body_start != 0
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| 170 | my $line_opening_brace; # number of previous line with opening brace after do/while/for, optionally for if/else
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| 171 |
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| 172 | my $keyword_opening_brace; # name of previous keyword, used if $line_opening_brace != 0
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| 173 | my $block_indent; # currently required normal indentation at block/statement level
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| 174 | my $hanging_offset; # extra indent, which may be nested, for just one hanging statement or expr or typedef
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| 175 | my @in_do_hanging_offsets; # stack of hanging offsets for nested 'do' ... 'while'
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| 176 | my @in_if_hanging_offsets; # stack of hanging offsets for nested 'if' (but not its potential 'else' branch)
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| 177 | my $if_maybe_terminated; # 'if' ends and $hanging_offset should be reset unless the next line starts with 'else'
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| 178 | my @nested_block_indents; # stack of indentations at block/statement level, needed due to hanging statements
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| 179 | my @nested_hanging_offsets;# stack of nested $hanging_offset values, in parallel to @nested_block_indents
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| 180 | my @nested_in_typedecl; # stack of nested $in_typedecl values, partly in parallel to @nested_block_indents
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| 181 | my @nested_indents; # stack of hanging indents due to parentheses, braces, brackets, or conditionals
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| 182 | my @nested_symbols; # stack of hanging symbols '(', '{', '[', or '?', in parallel to @nested_indents
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| 183 | my @nested_conds_indents; # stack of hanging indents due to conditionals ('?' ... ':')
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| 184 | my $expr_indent; # resulting hanging indent within (multi-line) expressions including type exprs, else 0
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| 185 | my $hanging_symbol; # character ('(', '{', '[', not: '?') responsible for $expr_indent, if $expr_indent != 0
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| 186 | my $in_block_decls; # number of local declaration lines after block opening before normal statements, or -1 if no block opening
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| 187 | my $in_expr; # in expression after if/while/for/switch/return/enum/LHS of assignment
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| 188 | my $in_paren_expr; # in parenthesized if/while/for condition and switch expression, if $expr_indent != 0
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| 189 | my $in_typedecl; # nesting level of typedef/struct/union/enum
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| 190 |
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| 191 | my $num_reports_line = 0; # number of issues found on current line
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| 192 | my $num_reports = 0; # total number of issues found
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| 193 | my $num_indent_reports = 0;# total number of indentation issues found
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| 194 | my $num_nesting_issues = 0;# total number of preprocessor #if nesting issues found
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| 195 | my $num_syntax_issues = 0; # total number of syntax issues found during sanity checks
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| 196 | my $num_SPC_reports = 0; # total number of whitespace issues found
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| 197 | my $num_length_reports = 0;# total number of line length issues found
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| 198 |
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| 199 | sub reset_file_state {
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| 200 | $in_comment = 0;
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| 201 | $ifdef__cplusplus = 0;
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| 202 | $preproc_if_nesting = 0;
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| 203 | $in_preproc = 0;
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| 204 | $line = 0;
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| 205 | $line_before = 0;
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| 206 | $line_before2 = 0;
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| 207 | reset_indentation_state();
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| 208 | }
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| 209 | sub reset_indentation_state {
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| 210 | $code_contents_before = "";
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| 211 | @nested_block_indents = ();
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| 212 | @nested_hanging_offsets = ();
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| 213 | @nested_in_typedecl = ();
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| 214 | @nested_symbols = ();
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| 215 | @nested_indents = ();
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| 216 | @nested_conds_indents = ();
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| 217 | $expr_indent = 0;
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| 218 | $in_block_decls = -1;
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| 219 | $in_expr = 0;
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| 220 | $in_paren_expr = 0;
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| 221 | $hanging_offset = 0;
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| 222 | @in_do_hanging_offsets = ();
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| 223 | @in_if_hanging_offsets = ();
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| 224 | $if_maybe_terminated = 0;
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| 225 | $block_indent = 0;
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| 226 | $in_multiline_string = 0;
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| 227 | $line_body_start = 0;
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| 228 | $line_opening_brace = 0;
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| 229 | $in_typedecl = 0;
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| 230 | }
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| 231 | my $bak_line_before;
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| 232 | my $bak_line_before2;
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| 233 | my $bak_code_contents_before;
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| 234 | my @bak_nested_block_indents;
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| 235 | my @bak_nested_hanging_offsets;
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| 236 | my @bak_nested_in_typedecl;
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| 237 | my @bak_nested_symbols;
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| 238 | my @bak_nested_indents;
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| 239 | my @bak_nested_conds_indents;
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| 240 | my $bak_expr_indent;
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| 241 | my $bak_in_block_decls;
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| 242 | my $bak_in_expr;
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| 243 | my $bak_in_paren_expr;
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| 244 | my $bak_hanging_offset;
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| 245 | my @bak_in_do_hanging_offsets;
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| 246 | my @bak_in_if_hanging_offsets;
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| 247 | my $bak_if_maybe_terminated;
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| 248 | my $bak_block_indent;
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| 249 | my $bak_in_multiline_string;
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| 250 | my $bak_line_body_start;
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| 251 | my $bak_line_opening_brace;
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| 252 | my $bak_in_typedecl;
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| 253 | sub backup_indentation_state {
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| 254 | $bak_code_contents_before = $code_contents_before;
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| 255 | @bak_nested_block_indents = @nested_block_indents;
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| 256 | @bak_nested_hanging_offsets = @nested_hanging_offsets;
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| 257 | @bak_nested_in_typedecl = @nested_in_typedecl;
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| 258 | @bak_nested_symbols = @nested_symbols;
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| 259 | @bak_nested_indents = @nested_indents;
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| 260 | @bak_nested_conds_indents = @nested_conds_indents;
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| 261 | $bak_expr_indent = $expr_indent;
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| 262 | $bak_in_block_decls = $in_block_decls;
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| 263 | $bak_in_expr = $in_expr;
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| 264 | $bak_in_paren_expr = $in_paren_expr;
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| 265 | $bak_hanging_offset = $hanging_offset;
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| 266 | @bak_in_do_hanging_offsets = @in_do_hanging_offsets;
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| 267 | @bak_in_if_hanging_offsets = @in_if_hanging_offsets;
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| 268 | $bak_if_maybe_terminated = $if_maybe_terminated;
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| 269 | $bak_block_indent = $block_indent;
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| 270 | $bak_in_multiline_string = $in_multiline_string;
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| 271 | $bak_line_body_start = $line_body_start;
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| 272 | $bak_line_opening_brace = $line_opening_brace;
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| 273 | $bak_in_typedecl = $in_typedecl;
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| 274 | }
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| 275 | sub restore_indentation_state {
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| 276 | $code_contents_before = $bak_code_contents_before;
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| 277 | @nested_block_indents = @bak_nested_block_indents;
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| 278 | @nested_hanging_offsets = @bak_nested_hanging_offsets;
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| 279 | @nested_in_typedecl = @bak_nested_in_typedecl;
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| 280 | @nested_symbols = @bak_nested_symbols;
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| 281 | @nested_indents = @bak_nested_indents;
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| 282 | @nested_conds_indents = @bak_nested_conds_indents;
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| 283 | $expr_indent = $bak_expr_indent;
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| 284 | $in_block_decls = $bak_in_block_decls;
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| 285 | $in_expr = $bak_in_expr;
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| 286 | $in_paren_expr = $bak_in_paren_expr;
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| 287 | $hanging_offset = $bak_hanging_offset;
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| 288 | @in_do_hanging_offsets = @bak_in_do_hanging_offsets;
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| 289 | @in_if_hanging_offsets = @bak_in_if_hanging_offsets;
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| 290 | $if_maybe_terminated = $bak_if_maybe_terminated;
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| 291 | $block_indent = $bak_block_indent;
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| 292 | $in_multiline_string = $bak_in_multiline_string;
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| 293 | $line_body_start = $bak_line_body_start;
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| 294 | $line_opening_brace = $bak_line_opening_brace;
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| 295 | $in_typedecl = $bak_in_typedecl;
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| 296 | }
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| 297 |
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| 298 | # auxiliary submodules @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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| 299 |
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| 300 | sub report_flexibly {
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| 301 | my $line = shift;
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| 302 | my $msg = shift;
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| 303 | my $contents = shift;
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| 304 | my $report_SPC = $msg =~ /space|blank/;
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| 305 | return if $report_SPC && $sloppy_SPC;
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| 306 |
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| 307 | print "$ARGV:$line:$msg:$contents" unless $self_test;
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| 308 | $num_reports_line++;
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| 309 | $num_reports++;
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| 310 | $num_indent_reports++ if $msg =~ m/:indent /;
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| 311 | $num_nesting_issues++ if $msg =~ m/ nesting indent /;
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| 312 | $num_syntax_issues++ if $msg =~ m/unclosed|unexpected/;
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| 313 | $num_SPC_reports++ if $report_SPC;
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| 314 | $num_length_reports++ if $msg =~ m/length/;
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| 315 | }
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| 316 |
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| 317 | sub report {
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| 318 | my $msg = shift;
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| 319 | report_flexibly($line, $msg, $contents);
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| 320 | }
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| 321 |
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| 322 | sub parens_balance { # count balance of opening parentheses - closing parentheses
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| 323 | my $str = shift;
|
|---|
| 324 | return $str =~ tr/\(// - $str =~ tr/\)//;
|
|---|
| 325 | }
|
|---|
| 326 |
|
|---|
| 327 | sub blind_nonspace { # blind non-space text of comment as @, preserving length and spaces
|
|---|
| 328 | # the @ character is used because it cannot occur in normal program code so there is no confusion
|
|---|
| 329 | # comment text is not blinded to whitespace in order to be able to check extra SPC also in comments
|
|---|
| 330 | my $comment_text = shift;
|
|---|
| 331 | $comment_text =~ s/([\.\?\!])\s\s/$1. /g; # in extra SPC checks allow one extra SPC after period '.', '?', or '!' in comments
|
|---|
| 332 | return $comment_text =~ tr/ /@/cr;
|
|---|
| 333 | }
|
|---|
| 334 |
|
|---|
| 335 | # submodule for indentation checking/reporting @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 336 |
|
|---|
| 337 | sub check_indent { # used for lines outside multi-line string literals
|
|---|
| 338 | my $stmt_indent = $block_indent + $hanging_offset + $local_offset;
|
|---|
| 339 | # print "DEBUG: expr_indent $expr_indent; stmt_indent $stmt_indent = block_indent $block_indent + hanging_offset $hanging_offset + local_offset $local_offset\n";
|
|---|
| 340 | $stmt_indent = 0 if $stmt_indent < 0; # TODO maybe give warning/error
|
|---|
| 341 | my $stmt_desc = $contents =~
|
|---|
| 342 | m/^\s*\/\*/ ? "intra-line comment" :
|
|---|
| 343 | $has_label ? "label" :
|
|---|
| 344 | ($hanging_offset != 0 ? "hanging " : "").
|
|---|
| 345 | ($hanging_offset != 0 ? "stmt/expr" : "stmt/decl"); # $in_typedecl is not fully to the point here
|
|---|
| 346 | my ($ref_desc, $ref_indent) = $expr_indent == 0 ? ($stmt_desc, $stmt_indent)
|
|---|
| 347 | : ("hanging '$hanging_symbol'", $expr_indent);
|
|---|
| 348 | my ($alt_desc, $alt_indent) = ("", $ref_indent);
|
|---|
| 349 |
|
|---|
| 350 | # allow indent 1 for labels - this cannot happen for leading ':'
|
|---|
| 351 | ($alt_desc, $alt_indent) = ("outermost position", 1) if $expr_indent == 0 && $has_label;
|
|---|
| 352 |
|
|---|
| 353 | if (@nested_conds_indents != 0 && substr($_, $count, 1) eq ":") {
|
|---|
| 354 | # leading ':' within stmt/expr/decl - this cannot happen for labels, leading '&&', or leading '||'
|
|---|
| 355 | # allow special indent at level of corresponding "?"
|
|---|
| 356 | ($alt_desc, $alt_indent) = ("leading ':'", @nested_conds_indents[-1]);
|
|---|
| 357 | }
|
|---|
| 358 | # allow extra indent offset leading '&&' or '||' - this cannot happen for leading ":"
|
|---|
| 359 | ($alt_desc, $alt_indent) = ("leading '$1'", $ref_indent + INDENT_LEVEL) if $contents =~ m/^[\s@]*(\&\&|\|\|)/;
|
|---|
| 360 |
|
|---|
| 361 | if ($expr_indent < 0) { # implies @nested_symbols != 0 && @nested_symbols[0] eq "{" && @nested_indents[-1] < 0
|
|---|
| 362 | # allow normal stmt indentation level for hanging initializer/enum expressions after trailing '{'
|
|---|
| 363 | # this cannot happen for labels and overrides special treatment of ':', '&&' and '||' for this line
|
|---|
| 364 | ($alt_desc, $alt_indent) = ("lines after '{'", $stmt_indent);
|
|---|
| 365 | # decide depending on current actual indentation, preventing forth and back
|
|---|
| 366 | @nested_indents[-1] = $count == $stmt_indent ? $stmt_indent : -@nested_indents[-1]; # allow $stmt_indent
|
|---|
| 367 | $ref_indent = $expr_indent = @nested_indents[-1];
|
|---|
| 368 | }
|
|---|
| 369 |
|
|---|
| 370 | # check consistency of indentation within multi-line comment (i.e., between its first, inner, and last lines)
|
|---|
| 371 | if ($in_comment != 0 && $in_comment != 1) { # in multi-line comment but not on its first line
|
|---|
| 372 | if (!$sloppy_cmt) {
|
|---|
| 373 | if ($in_comment > 0) { # not at its end
|
|---|
| 374 | report("indent = $count != $comment_indent within multi-line comment")
|
|---|
| 375 | if $count != $comment_indent;
|
|---|
| 376 | } else {
|
|---|
| 377 | my $tweak = $in_comment == -2 ? 1 : 0;
|
|---|
| 378 | report("indent = ".($count + $tweak)." != $comment_indent at end of multi-line comment")
|
|---|
| 379 | if $count + $tweak != $comment_indent;
|
|---|
| 380 | }
|
|---|
| 381 | }
|
|---|
| 382 | # do not check indentation of last line of non-leading multi-line comment
|
|---|
| 383 | if ($in_comment < 0 && !$leading_comment) {
|
|---|
| 384 | s/^(\s*)@/$1*/; # blind first '@' as '*' to prevent below delayed check for the line before
|
|---|
| 385 | return;
|
|---|
| 386 | }
|
|---|
| 387 | return if $in_comment > 0; # not on its last line
|
|---|
| 388 | # $comment_indent will be checked by the below checks for end of multi-line comment
|
|---|
| 389 | }
|
|---|
| 390 |
|
|---|
| 391 | # else check indentation of entire-line comment or entire-line end of multi-line comment
|
|---|
| 392 | # ... w.r.t. indent of the following line by delayed check for the line before
|
|---|
| 393 | if (($in_comment == 0 || $in_comment == 1) # no comment, intra-line comment, or begin of multi-line comment
|
|---|
| 394 | && $line_before > 0 # there is a line before
|
|---|
| 395 | && $contents_before_ =~ m/^(\s*)@[\s@]*$/) { # line before begins with '@', no code follows (except '\')
|
|---|
| 396 | report_flexibly($line_before, "entire-line comment indent = $count_before != $count (of following line)",
|
|---|
| 397 | $contents_before) if !$sloppy_cmt && $count_before != -1 && $count_before != $count;
|
|---|
| 398 | }
|
|---|
| 399 | # ... but allow normal indentation for the current line, else above check will be done for the line before
|
|---|
| 400 | if (($in_comment == 0 || $in_comment < 0) # (no comment,) intra-line comment or end of multi-line comment
|
|---|
| 401 | && m/^(\s*)@[\s@]*$/) { # line begins with '@', no code follows (except '\')
|
|---|
| 402 | if ($count == $ref_indent) { # indentation is like for (normal) code in this line
|
|---|
| 403 | s/^(\s*)@/$1*/; # blind first '@' as '*' to prevent above delayed check for the line before
|
|---|
| 404 | return;
|
|---|
| 405 | }
|
|---|
| 406 | return if !eof; # defer check of entire-line comment to next line
|
|---|
| 407 | }
|
|---|
| 408 |
|
|---|
| 409 | # else check indentation of leading intra-line comment or end of multi-line comment
|
|---|
| 410 | if (m/^(\s*)@/) { # line begins with '@', i.e., any (remaining type of) comment
|
|---|
| 411 | if (!$sloppy_cmt && $count != $ref_indent) {
|
|---|
| 412 | report("intra-line comment indent = $count != $ref_indent") if $in_comment == 0;
|
|---|
| 413 | report("multi-line comment indent = $count != $ref_indent") if $in_comment < 0;
|
|---|
| 414 | }
|
|---|
| 415 | return;
|
|---|
| 416 | }
|
|---|
| 417 |
|
|---|
| 418 | if ($sloppy_hang && ($hanging_offset != 0 || $expr_indent != 0)) {
|
|---|
| 419 | # do not report same indentation as on the line before (potentially due to same violations)
|
|---|
| 420 | return if $line_before > 0 && $count == $count_before;
|
|---|
| 421 |
|
|---|
| 422 | # do not report indentation at normal indentation level while hanging expression indent would be required
|
|---|
| 423 | return if $expr_indent != 0 && $count == $stmt_indent;
|
|---|
| 424 |
|
|---|
| 425 | # do not report if contents have been shifted left of nested expr indent (but not as far as stmt indent)
|
|---|
| 426 | # apparently aligned to the right in order to fit within line length limit
|
|---|
| 427 | return if $stmt_indent < $count && $count < $expr_indent &&
|
|---|
| 428 | length($contents) == MAX_LINE_LENGTH + length("\n");
|
|---|
| 429 | }
|
|---|
| 430 |
|
|---|
| 431 | report("indent = $count != $ref_indent for $ref_desc".
|
|---|
| 432 | ($alt_desc eq ""
|
|---|
| 433 | || $alt_indent == $ref_indent # prevent showing alternative that happens to have equal value
|
|---|
| 434 | ? "" : " or $alt_indent for $alt_desc"))
|
|---|
| 435 | if $count != $ref_indent && $count != $alt_indent;
|
|---|
| 436 | }
|
|---|
| 437 |
|
|---|
| 438 | # submodules handling indentation within expressions @@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 439 |
|
|---|
| 440 | sub update_nested_indents { # may reset $in_paren_expr and in this case also resets $in_expr
|
|---|
| 441 | my $str = shift;
|
|---|
| 442 | my $start = shift; # defaults to 0
|
|---|
| 443 | my $terminator_position = -1;
|
|---|
| 444 | for (my $i = $start; $i < length($str); $i++) {
|
|---|
| 445 | my $c;
|
|---|
| 446 | my $curr = substr($str, $i);
|
|---|
| 447 | if ($curr =~ m/^(.*?)([{}()?:;\[\]])(.*)$/) { # match from position $i the first {}()?:;[]
|
|---|
| 448 | $c = $2;
|
|---|
| 449 | } else {
|
|---|
| 450 | last;
|
|---|
| 451 | }
|
|---|
| 452 | my ($head, $tail) = (substr($str, 0, $i).$1, $3);
|
|---|
| 453 | $i += length($1) + length($2) - 1;
|
|---|
| 454 |
|
|---|
| 455 | # stop at terminator outside 'for (..;..;..)', assuming that 'for' is followed by '('
|
|---|
| 456 | return $i if $c eq ";" && (!$in_paren_expr || @nested_indents == 0);
|
|---|
| 457 |
|
|---|
| 458 | my $in_stmt = $in_expr || @nested_symbols != 0; # not: || $in_typedecl != 0
|
|---|
| 459 | if ($c =~ m/[{([?]/) { # $c is '{', '(', '[', or '?'
|
|---|
| 460 | if ($c eq "{") { # '{' in any context
|
|---|
| 461 | $in_block_decls = 0 if !$in_expr && $in_typedecl == 0;
|
|---|
| 462 | # cancel newly hanging_offset if opening brace '{' is after non-whitespace non-comment:
|
|---|
| 463 | $hanging_offset -= INDENT_LEVEL if $hanging_offset > 0 && $head =~ m/[^\s\@]/;
|
|---|
| 464 | push @nested_block_indents, $block_indent;
|
|---|
| 465 | push @nested_hanging_offsets, $in_expr ? $hanging_offset : 0;
|
|---|
| 466 | push @nested_in_typedecl, $in_typedecl if $in_typedecl != 0;
|
|---|
| 467 | $block_indent += INDENT_LEVEL + $hanging_offset;
|
|---|
| 468 | $hanging_offset = 0;
|
|---|
| 469 | }
|
|---|
| 470 | if ($c ne "{" || $in_stmt) { # for '{' inside stmt/expr (not: decl), for '(', '[', or '?' anywhere
|
|---|
| 471 | $tail =~ m/^([\s@]*)([^\s\@])/;
|
|---|
| 472 | push @nested_indents, defined $2
|
|---|
| 473 | ? $i + 1 + length($1) # actual indentation of following non-space non-comment
|
|---|
| 474 | : $c ne "{" ? +($i + 1) # just after '(' or '[' if only whitespace thereafter
|
|---|
| 475 | : -($i + 1); # allow also $stmt_indent if '{' with only whitespace thereafter
|
|---|
| 476 | push @nested_symbols, $c; # done also for '?' to be able to check correct nesting
|
|---|
| 477 | push @nested_conds_indents, $i if $c eq "?"; # remember special alternative indent for ':'
|
|---|
| 478 | }
|
|---|
| 479 | } elsif ($c =~ m/[})\]:]/) { # $c is '}', ')', ']', or ':'
|
|---|
| 480 | my $opening_c = ($c =~ tr/})]:/{([/r);
|
|---|
| 481 | if (($c ne ":" || $in_stmt # ignore ':' outside stmt/expr/decl
|
|---|
| 482 | # in the presence of ':', one could add this sanity check:
|
|---|
| 483 | # && !(# ':' after initial label/case/default
|
|---|
| 484 | # $head =~ m/^([\s@]*)(case\W.*$|\w+$)/ || # this matching would not work for
|
|---|
| 485 | # # multi-line expr after 'case'
|
|---|
| 486 | # # bitfield length within unsigned type decl
|
|---|
| 487 | # $tail =~ m/^[\s@]*\d+/ # this matching would need improvement
|
|---|
| 488 | # )
|
|---|
| 489 | )) {
|
|---|
| 490 | if ($c ne "}" || $in_stmt) { # for '}' inside stmt/expr/decl, ')', ']', or ':'
|
|---|
| 491 | if (@nested_symbols != 0 &&
|
|---|
| 492 | @nested_symbols[-1] == $opening_c) { # for $c there was a corresponding $opening_c
|
|---|
| 493 | pop @nested_indents;
|
|---|
| 494 | pop @nested_symbols;
|
|---|
| 495 | pop @nested_conds_indents if $opening_c eq "?";
|
|---|
| 496 | } else {
|
|---|
| 497 | report("unexpected '$c' @ ".($in_paren_expr ? "(expr)" : "expr"));
|
|---|
| 498 | next;
|
|---|
| 499 | }
|
|---|
| 500 | }
|
|---|
| 501 | if ($c eq "}") { # '}' at block level but also inside stmt/expr/decl
|
|---|
| 502 | if (@nested_block_indents == 0) {
|
|---|
| 503 | report("unexpected '}'");
|
|---|
| 504 | } else {
|
|---|
| 505 | $block_indent = pop @nested_block_indents;
|
|---|
| 506 | $hanging_offset = pop @nested_hanging_offsets;
|
|---|
| 507 | $in_typedecl = pop @nested_in_typedecl if @nested_in_typedecl != 0;
|
|---|
| 508 | }
|
|---|
| 509 | }
|
|---|
| 510 | if ($in_paren_expr && !grep(/\(/, @nested_symbols)) { # end of (expr)
|
|---|
| 511 | check_nested_nonblock_indents("(expr)");
|
|---|
| 512 | $in_paren_expr = $in_expr = 0;
|
|---|
| 513 | report("code after (expr)")
|
|---|
| 514 | if $tail =~ m/^([^{]*)/ && $1 =~ m/[^\s\@;]/; # non-space non-';' before any '{'
|
|---|
| 515 | }
|
|---|
| 516 | }
|
|---|
| 517 | }
|
|---|
| 518 | }
|
|---|
| 519 | return -1;
|
|---|
| 520 | }
|
|---|
| 521 |
|
|---|
| 522 | sub check_nested_nonblock_indents {
|
|---|
| 523 | my $position = shift;
|
|---|
| 524 | while (@nested_symbols != 0) {
|
|---|
| 525 | my $symbol = pop @nested_symbols;
|
|---|
| 526 | report("unclosed '$symbol' in $position");
|
|---|
| 527 | if ($symbol eq "{") { # repair stack of blocks
|
|---|
| 528 | $block_indent = pop @nested_block_indents;
|
|---|
| 529 | $hanging_offset = pop @nested_hanging_offsets;
|
|---|
| 530 | $in_typedecl = pop @nested_in_typedecl if @nested_in_typedecl != 0;
|
|---|
| 531 | }
|
|---|
| 532 | }
|
|---|
| 533 | @nested_indents = ();
|
|---|
| 534 | @nested_conds_indents = ();
|
|---|
| 535 | }
|
|---|
| 536 |
|
|---|
| 537 | # start of main program @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 538 |
|
|---|
| 539 | reset_file_state();
|
|---|
| 540 |
|
|---|
| 541 | while (<>) { # loop over all lines of all input files
|
|---|
| 542 | $self_test = $ARGV =~ m/check-format-test/;
|
|---|
| 543 | $_ = "" if $self_test && m/ blank line within local decls /;
|
|---|
| 544 | $line++;
|
|---|
| 545 | s/\r$//; # strip any trailing CR '\r' (which are typical on Windows systems)
|
|---|
| 546 | $contents = $_;
|
|---|
| 547 |
|
|---|
| 548 | # check for illegal characters
|
|---|
| 549 | if (m/(.*?)([\x00-\x09\x0B-\x1F\x7F-\xFF])/) {
|
|---|
| 550 | my $col = length($1);
|
|---|
| 551 | report(($2 eq "\x09" ? "TAB" : $2 eq "\x0D" ? "CR " : $2 =~ m/[\x00-\x1F]/ ? "non-printable"
|
|---|
| 552 | : "non-7bit char") . " at column $col") ;
|
|---|
| 553 | }
|
|---|
| 554 |
|
|---|
| 555 | # check for whitespace at EOL
|
|---|
| 556 | report("trailing whitespace at EOL") if m/\s\n$/;
|
|---|
| 557 |
|
|---|
| 558 | # assign to $count the actual indentation level of the current line
|
|---|
| 559 | chomp; # remove trailing NL '\n'
|
|---|
| 560 | m/^(\s*)/;
|
|---|
| 561 | $count = length($1); # actual indentation
|
|---|
| 562 | $has_label = 0;
|
|---|
| 563 | $local_offset = 0;
|
|---|
| 564 |
|
|---|
| 565 | # character/string literals @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 566 |
|
|---|
| 567 | s/\\["']/@@/g; # blind all '"' and "'" escaped by '\' (typically within character literals or string literals)
|
|---|
| 568 |
|
|---|
| 569 | # handle multi-line string literals to avoid confusion on starting/ending '"' and trailing '\'
|
|---|
| 570 | if ($in_multiline_string) {
|
|---|
| 571 | if (s#^([^"]*)"#($1 =~ tr/"/@/cr).'@'#e) { # string literal terminated by '"'
|
|---|
| 572 | # string contents and its terminating '"' have been blinded as '@'
|
|---|
| 573 | $count = -1; # do not check indentation
|
|---|
| 574 | } else {
|
|---|
| 575 | report("multi-line string literal not terminated by '\"' and trailing '\' is missing")
|
|---|
| 576 | unless s#^([^\\]*)\s*\\\s*$#$1#; # strip trailing '\' plus any whitespace around
|
|---|
| 577 | goto LINE_FINISHED;
|
|---|
| 578 | }
|
|---|
| 579 | }
|
|---|
| 580 |
|
|---|
| 581 | # blind contents of character and string literals as @, preserving length (but not spaces)
|
|---|
| 582 | # this prevents confusing any of the matching below, e.g., of whitespace and comment delimiters
|
|---|
| 583 | s#('[^']*')#$1 =~ tr/'/@/cr#eg; # handle all intra-line character literals
|
|---|
| 584 | s#("[^"]*")#$1 =~ tr/"/@/cr#eg; # handle all intra-line string literals
|
|---|
| 585 | $in_multiline_string = # handle trailing string literal terminated by '\'
|
|---|
| 586 | s#^(([^"]*"[^"]*")*[^"]*)("[^"]*)\\(\s*)$#$1.($3 =~ tr/"/@/cr).'"'.$4#e;
|
|---|
| 587 | # its contents have been blinded and the trailing '\' replaced by '"'
|
|---|
| 588 |
|
|---|
| 589 | # strip any other trailing '\' along with any whitespace around it such that it does not interfere with various matching below
|
|---|
| 590 | my $trailing_backslash = s#^(.*?)\s*\\\s*$#$1#; # trailing '\' possibly preceded or followed by whitespace
|
|---|
| 591 | my $essentially_blank_line = m/^\s*$/; # just whitespace and maybe a '\'
|
|---|
| 592 |
|
|---|
| 593 | # comments @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 594 |
|
|---|
| 595 | # do/prepare checks within multi-line comments
|
|---|
| 596 | my $self_test_exception = $self_test ? "@" : "";
|
|---|
| 597 | if ($in_comment > 0) { # this still includes the last line of multi-line comment
|
|---|
| 598 | my ($head, $any_symbol, $cmt_text) = m/^(\s*)(.?)(.*)$/;
|
|---|
| 599 | if ($any_symbol eq "*") {
|
|---|
| 600 | report("missing space or '*' after leading '*' in multi-line comment") if $cmt_text =~ m|^[^*\s/$self_test_exception]|;
|
|---|
| 601 | } else {
|
|---|
| 602 | report("missing leading '*' in multi-line comment");
|
|---|
| 603 | }
|
|---|
| 604 | $in_comment++;
|
|---|
| 605 | }
|
|---|
| 606 |
|
|---|
| 607 | # detect end of comment, must be within multi-line comment, check if it is preceded by non-whitespace text
|
|---|
| 608 | if ((my ($head, $tail) = m|^(.*?)\*/(.*)$|) && $1 ne '/') { # ending comment: '*/'
|
|---|
| 609 | report("missing space or '*' before '*/'") if $head =~ m/[^*\s]$/;
|
|---|
| 610 | report("missing space (or ',', ';', ')', '}', ']') after '*/'") if $tail =~ m/^[^\s,;)}\]]/; # no space or ,;)}] after '*/'
|
|---|
| 611 | if (!($head =~ m|/\*|)) { # not begin of comment '/*', which is is handled below
|
|---|
| 612 | if ($in_comment == 0) {
|
|---|
| 613 | report("unexpected '*/' outside comment");
|
|---|
| 614 | $_ = "$head@@".$tail; # blind the "*/"
|
|---|
| 615 | } else {
|
|---|
| 616 | report("text before '*/' in multi-line comment") if ($head =~ m/[^*\s]/); # non-SPC before '*/'
|
|---|
| 617 | $in_comment = -1; # indicate that multi-line comment ends on current line
|
|---|
| 618 | if ($count > 0) {
|
|---|
| 619 | # make indentation of end of multi-line comment appear like of leading intra-line comment
|
|---|
| 620 | $head =~ s/^(\s*)\s/$1@/; # replace the last leading space by '@'
|
|---|
| 621 | $count--;
|
|---|
| 622 | $in_comment = -2; # indicate that multi-line comment ends on current line, with tweak
|
|---|
| 623 | }
|
|---|
| 624 | my $cmt_text = $head;
|
|---|
| 625 | $_ = blind_nonspace($cmt_text)."@@".$tail;
|
|---|
| 626 | }
|
|---|
| 627 | }
|
|---|
| 628 | }
|
|---|
| 629 |
|
|---|
| 630 | # detect begin of comment, check if it is followed by non-space text
|
|---|
| 631 | MATCH_COMMENT:
|
|---|
| 632 | if (my ($head, $opt_minus, $tail) = m|^(.*?)/\*(-?)(.*)$|) { # begin of comment: '/*'
|
|---|
| 633 | report("missing space before '/*'")
|
|---|
| 634 | if $head =~ m/[^\s(\*]$/; # not space, '(', or or '*' (needed to allow '*/') before comment delimiter
|
|---|
| 635 | report("missing space, '*', or '!' after '/*$opt_minus'") if $tail =~ m/^[^\s*!$self_test_exception]/;
|
|---|
| 636 | my $cmt_text = $opt_minus.$tail; # preliminary
|
|---|
| 637 | if ($in_comment > 0) {
|
|---|
| 638 | report("unexpected '/*' inside multi-line comment");
|
|---|
| 639 | } elsif ($tail =~ m|^(.*?)\*/(.*)$|) { # comment end: */ on same line
|
|---|
| 640 | report("unexpected '/*' inside intra-line comment") if $1 =~ /\/\*/;
|
|---|
| 641 | # blind comment text, preserving length and spaces
|
|---|
| 642 | ($cmt_text, my $rest) = ($opt_minus.$1, $2);
|
|---|
| 643 | $_ = "$head@@".blind_nonspace($cmt_text)."@@".$rest;
|
|---|
| 644 | goto MATCH_COMMENT;
|
|---|
| 645 | } else { # begin of multi-line comment
|
|---|
| 646 | my $self_test_exception = $self_test ? "(@\d?)?" : "";
|
|---|
| 647 | report("text after '/*' in multi-line comment")
|
|---|
| 648 | unless $tail =~ m/^$self_test_exception.?[*\s]*$/;
|
|---|
| 649 | # tail not essentially blank, first char already checked
|
|---|
| 650 | # adapt to actual indentation of first line
|
|---|
| 651 | $comment_indent = length($head) + 1;
|
|---|
| 652 | $_ = "$head@@".blind_nonspace($cmt_text);
|
|---|
| 653 | $in_comment = 1;
|
|---|
| 654 | $leading_comment = $head =~ m/^\s*$/; # there is code before beginning delimiter
|
|---|
| 655 | $formatted_comment = $opt_minus eq "-";
|
|---|
| 656 | }
|
|---|
| 657 | } elsif (($head, $tail) = m|^\{-(.*)$|) { # begin of Perl pragma: '{-'
|
|---|
| 658 | }
|
|---|
| 659 |
|
|---|
| 660 | if ($in_comment > 1) { # still inside multi-line comment (not at its begin or end)
|
|---|
| 661 | m/^(\s*)\*?(\s*)(.*)$/;
|
|---|
| 662 | $_ = $1."@".$2.blind_nonspace($3);
|
|---|
| 663 | }
|
|---|
| 664 |
|
|---|
| 665 | # handle special case of line after '#ifdef __cplusplus' (which typically appears in header files)
|
|---|
| 666 | if ($ifdef__cplusplus) {
|
|---|
| 667 | $ifdef__cplusplus = 0;
|
|---|
| 668 | $_ = "$1 $2" if $contents =~ m/^(\s*extern\s*"C"\s*)\{(\s*)$/; # ignore opening brace in 'extern "C" {'
|
|---|
| 669 | goto LINE_FINISHED if m/^\s*\}\s*$/; # ignore closing brace '}'
|
|---|
| 670 | }
|
|---|
| 671 |
|
|---|
| 672 | # check for over-long lines,
|
|---|
| 673 | # while allowing trailing (also multi-line) string literals to go past $max_length
|
|---|
| 674 | my $len = length; # total line length (without trailing '\n')
|
|---|
| 675 | if ($len > $max_length &&
|
|---|
| 676 | !(m/^(.*)"[^"]*"\s*[\)\}\]]*[,;]?\s*$/ # string literal terminated by '"' (or '\'), then maybe )}],;
|
|---|
| 677 | && length($1) < $max_length)
|
|---|
| 678 | # this allows over-long trailing string literals with beginning col before $max_length
|
|---|
| 679 | ) {
|
|---|
| 680 | report("line length = $len > ".MAX_LINE_LENGTH);
|
|---|
| 681 | }
|
|---|
| 682 |
|
|---|
| 683 | # handle C++ / C99 - style end-of-line comments
|
|---|
| 684 | if (my ($head, $cmt_text) = m|^(.*?)//(.*$)|) {
|
|---|
| 685 | report("'//' end-of-line comment"); # the '//' comment style is not allowed for C90
|
|---|
| 686 | # blind comment text, preserving length and spaces
|
|---|
| 687 | $_ = "$head@@".blind_nonspace($cmt_text);
|
|---|
| 688 | }
|
|---|
| 689 |
|
|---|
| 690 | # at this point all non-space portions of any types of comments have been blinded as @
|
|---|
| 691 |
|
|---|
| 692 | goto LINE_FINISHED if $essentially_blank_line;
|
|---|
| 693 |
|
|---|
| 694 | # handle preprocessor directives @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 695 |
|
|---|
| 696 | if (s/^(\s*#)(\s*)(\w+)//) { # line beginning with '#' and directive name;
|
|---|
| 697 | # blank these portions to prevent confusion with C-level 'if', 'else', etc.
|
|---|
| 698 | my ($lead, $space) = ($1, $2);
|
|---|
| 699 | $preproc_directive = $3;
|
|---|
| 700 | $_ = "$lead$space$preproc_directive$_" if $preproc_directive =~ m/^(define|include)$/; # yet do not blank #define or #include to prevent confusing the indentation or whitespace checks, resp.
|
|---|
| 701 | $_ = blind_nonspace($_) if $preproc_directive eq "error"; # blind error message
|
|---|
| 702 | if ($in_preproc != 0) {
|
|---|
| 703 | report("preprocessor directive within multi-line directive");
|
|---|
| 704 | reset_indentation_state();
|
|---|
| 705 | }
|
|---|
| 706 | $in_preproc++;
|
|---|
| 707 | report("indent = $count != 0 for '#'") if $count != 0;
|
|---|
| 708 | report("'#$preproc_directive' with constant condition")
|
|---|
| 709 | if $preproc_directive =~ m/^(if|elif)$/ && m/^[\W0-9]+$/ && !$trailing_backslash;
|
|---|
| 710 | $preproc_if_nesting-- if $preproc_directive =~ m/^(else|elif|endif)$/;
|
|---|
| 711 | if ($preproc_if_nesting < 0) {
|
|---|
| 712 | $preproc_if_nesting = 0;
|
|---|
| 713 | report("unexpected '#$preproc_directive' according to '#if' nesting");
|
|---|
| 714 | }
|
|---|
| 715 | my $space_count = length($space); # maybe could also use indentation before '#'
|
|---|
| 716 | report("'#if' nesting indent = $space_count != $preproc_if_nesting") if $space_count != $preproc_if_nesting;
|
|---|
| 717 | $preproc_if_nesting++ if $preproc_directive =~ m/^(if|ifdef|ifndef|else|elif)$/;
|
|---|
| 718 | $ifdef__cplusplus = $preproc_directive eq "ifdef" && m/\s+__cplusplus\s*$/;
|
|---|
| 719 |
|
|---|
| 720 | # handle indentation of preprocessor directive independently of surrounding normal code
|
|---|
| 721 | $count = -1; # do not check indentation of first line of preprocessor directive
|
|---|
| 722 | backup_indentation_state();
|
|---|
| 723 | reset_indentation_state();
|
|---|
| 724 | }
|
|---|
| 725 |
|
|---|
| 726 | # intra-line whitespace nits @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 727 |
|
|---|
| 728 | my $in_multiline_comment = ($in_comment > 1 || $in_comment < 0); # $in_multiline_comment refers to line before
|
|---|
| 729 | if (!$sloppy_SPC && !($in_multiline_comment && $formatted_comment)) {
|
|---|
| 730 | sub extra_SPC {
|
|---|
| 731 | my $intra_line = shift;
|
|---|
| 732 | return "extra space".($intra_line =~ m/@\s\s/ ?
|
|---|
| 733 | $in_comment != 0 ? " in multi-line comment"
|
|---|
| 734 | : " in intra-line comment" : "");
|
|---|
| 735 | }
|
|---|
| 736 | sub split_line_head { # split line contents into header containing leading spaces and the first non-space char, and the rest of the line
|
|---|
| 737 | my $comment_symbol =
|
|---|
| 738 | $in_comment != 0 ? "@" : ""; # '@' will match the blinded leading '*' in multi-line comment
|
|---|
| 739 | # $in_comment may pertain to the following line due to delayed check
|
|---|
| 740 | # do not check for extra SPC in leading spaces including any '#' (or '*' within multi-line comment)
|
|---|
| 741 | shift =~ m/^(\s*([#$comment_symbol]\s*)?)(.*?)\s*$/;
|
|---|
| 742 | return ($1, $3);
|
|---|
| 743 | }
|
|---|
| 744 | my ($head , $intra_line ) = split_line_head($_);
|
|---|
| 745 | my ($head1, $intra_line1) = split_line_head($contents_before_ ) if $line_before > 0;
|
|---|
| 746 | my ($head2, $intra_line2) = split_line_head($contents_before_2) if $line_before2 > 0;
|
|---|
| 747 | if ($line_before > 0) { # check with one line delay, such that at least $contents_before is available
|
|---|
| 748 | sub column_alignments_only { # return 1 if the given line has multiple consecutive spaces only at columns that match the reference line
|
|---|
| 749 | # all parameter strings are assumed to contain contents after blinding comments etc.
|
|---|
| 750 | my $head = shift; # leading spaces and the first non-space char
|
|---|
| 751 | my $intra = shift; # the rest of the line contents
|
|---|
| 752 | my $contents = shift; # reference line
|
|---|
| 753 | # check if all extra SPC in $intra is used only for multi-line column alignment with $contents
|
|---|
| 754 | my $offset = length($head);
|
|---|
| 755 | for (my $col = 0; $col < length($intra) - 2; $col++) {
|
|---|
| 756 | my $substr = substr($intra, $col);
|
|---|
| 757 | next unless $substr =~ m/^\s\s\S/; # extra SPC (but not in leading spaces of the line)
|
|---|
| 758 | next if !$eol_cmt && $substr =~ m/^[@\s]+$/; # end-of-line comment
|
|---|
| 759 | return 0 unless substr($contents, $col + $offset + 1, 2) =~ m/\s\S/; # reference line contents do not match
|
|---|
| 760 | }
|
|---|
| 761 | return 1;
|
|---|
| 762 | }
|
|---|
| 763 | report_flexibly($line_before, extra_SPC($intra_line1), $contents_before) if $intra_line1 =~ m/\s\s\S/ &&
|
|---|
| 764 | !( column_alignments_only($head1, $intra_line1, $_ ) # compare with $line
|
|---|
| 765 | || ($line_before2 > 0 &&
|
|---|
| 766 | column_alignments_only($head1, $intra_line1, $contents_before_2))); # compare w/ $line_before2
|
|---|
| 767 | report(extra_SPC($intra_line)) if $intra_line =~ m/\s\s\S/ && eof
|
|---|
| 768 | && ! column_alignments_only($head , $intra_line , $contents_before_ ) ; # compare w/ $line_before
|
|---|
| 769 | } elsif (eof) { # special case: just one line exists
|
|---|
| 770 | report(extra_SPC($intra_line)) if $intra_line =~ m/\s\s\S/;
|
|---|
| 771 | }
|
|---|
| 772 | # ignore paths in #include
|
|---|
| 773 | $intra_line =~ s/^(include\s*)(".*?"|<.*?>)/$1/e if $head =~ m/#/;
|
|---|
| 774 | report("missing space before '$2'")
|
|---|
| 775 | if $intra_line =~ m/(\S)((<<|>>)=)/ # '<<=' or >>=' without preceding space
|
|---|
| 776 | || ($intra_line =~ m/(\S)([\+\-\*\/\/%\&\|\^\!<>=]=)/
|
|---|
| 777 | && "$1$2" ne "<<=" && "$1$2" ne ">>=") # other <op>= or (in)equality without preceding space
|
|---|
| 778 | || ($intra_line =~ m/(\S)=/
|
|---|
| 779 | && !($1 =~ m/[\+\-\*\/\/%\&\|\^\!<>=]/)
|
|---|
| 780 | && $intra_line =~ m/(\S)(=)/); # otherwise, '=' without preceding space
|
|---|
| 781 | # treat op= and comparison operators as simple '=', simplifying matching below
|
|---|
| 782 | $intra_line =~ s/(<<|>>|[\+\-\*\/\/%\&\|\^\!<>=])=/=/g;
|
|---|
| 783 | # treat (type) variables within macro, indicated by trailing '\', as 'int' simplifying matching below
|
|---|
| 784 | $intra_line =~ s/[A-Z_]+/int/g if $trailing_backslash;
|
|---|
| 785 | # treat double &&, ||, <<, and >> as single ones, simplifying matching below
|
|---|
| 786 | $intra_line =~ s/(&&|\|\||<<|>>)/substr($1, 0, 1)/eg;
|
|---|
| 787 | # remove blinded comments etc. directly after [{(
|
|---|
| 788 | while ($intra_line =~ s/([\[\{\(])@+\s?/$1/e) {} # /g does not work here
|
|---|
| 789 | # remove blinded comments etc. directly before ,;)}]
|
|---|
| 790 | while ($intra_line =~ s/\s?@+([,;\)\}\]])/$1/e) {} # /g does not work here
|
|---|
| 791 | # treat remaining blinded comments and string literal contents as (single) space during matching below
|
|---|
| 792 | $intra_line =~ s/@+/ /g; # note that extra SPC has already been handled above
|
|---|
| 793 | $intra_line =~ s/\s+$//; # strip any (resulting) space at EOL
|
|---|
| 794 | # replace ';;' or '; ;' by ';' in "for(;;)" and in "for (...)" unless "..." contains just SPC and ';' characters:
|
|---|
| 795 | $intra_line =~ s/((^|\W)for\s*\()([^;]*?)(\s*)(;\s?);(\s*)([^;]*)(\))/
|
|---|
| 796 | "$1$3$4".("$3$4$5$6$7" eq ";" || $3 ne "" || $7 ne "" ? "" : $5).";$6$7$8"/eg;
|
|---|
| 797 | # strip trailing ';' or '; ' in "for (...)" except in "for (;;)" or "for (;; )":
|
|---|
| 798 | $intra_line =~ s/((^|\W)for\s*\()([^;]*(;[^;]*)?)(;\s?)(\))/
|
|---|
| 799 | "$1$3".($3 eq ";" ? $5 : "")."$6"/eg;
|
|---|
| 800 | $intra_line =~ s/(=\s*)\{ /"$1@ "/eg; # do not report {SPC in initializers such as ' = { 0, };'
|
|---|
| 801 | $intra_line =~ s/, \};/, @;/g; # do not report SPC} in initializers such as ' = { 0, };'
|
|---|
| 802 | report("space before '$1'") if $intra_line =~ m/[\w)\]]\s+(\+\+|--)/; # postfix ++/-- with preceding space
|
|---|
| 803 | report("space after '$1'") if $intra_line =~ m/(\+\+|--)\s+[a-zA-Z_(]/; # prefix ++/-- with following space
|
|---|
| 804 | $intra_line =~ s/\.\.\./@/g; # blind '...'
|
|---|
| 805 | report("space before '$1'") if $intra_line =~ m/\s(\.|->)/; # '.' or '->' with preceding space
|
|---|
| 806 | report("space after '$1'") if $intra_line =~ m/(\.|->)\s/; # '.' or '->' with following space
|
|---|
| 807 | $intra_line =~ s/\-\>|\+\+|\-\-/@/g; # blind '->,', '++', and '--'
|
|---|
| 808 | report("space before '$1'") if $intra_line =~ m/[^:)]\s+(;)/; # space before ';' but not after ':' or ')' # note that
|
|---|
| 809 | # exceptions for "for (;; )" are handled above
|
|---|
| 810 | report("space before '$1'") if $intra_line =~ m/\s([,)\]])/; # space before ,)]
|
|---|
| 811 | report("space after '$1'") if $intra_line =~ m/([(\[~!])\s/; # space after ([~!
|
|---|
| 812 | report("space after '$1'") if $intra_line =~ m/(defined)\s/; # space after 'defined'
|
|---|
| 813 | report("missing space before '$1'") if $intra_line =~ m/\S([|\/%<>^\?])/; # |/%<>^? without preceding space
|
|---|
| 814 | # TODO ternary ':' without preceding SPC, while allowing no SPC before ':' after 'case'
|
|---|
| 815 | report("missing space before binary '$2'") if $intra_line =~ m/([^\s{()\[e])([+\-])/; # '+'/'-' without preceding space or {()[e
|
|---|
| 816 | # ')' may be used for type casts or before "->", 'e' may be used for numerical literals such as "1e-6"
|
|---|
| 817 | report("missing space before binary '$1'") if $intra_line =~ m/[^\s{()\[*!]([*])/; # '*' without preceding space or {()[*!
|
|---|
| 818 | report("missing space before binary '$1'") if $intra_line =~ m/[^\s{()\[]([&])/; # '&' without preceding space or {()[
|
|---|
| 819 | report("missing space after ternary '$1'") if $intra_line =~ m/(:)[^\s\d]/; # ':' without following space or digit
|
|---|
| 820 | report("missing space after '$1'") if $intra_line =~ m/([,;=|\/%<>^\?])\S/; # ,;=|/%<>^? without following space
|
|---|
| 821 | report("missing space after binary '$1'") if $intra_line=~m/[^{(\[]([*])[^\sa-zA-Z_(),*]/;# '*' w/o space or \w(),* after
|
|---|
| 822 | # TODO unary '*' must not be followed by SPC
|
|---|
| 823 | report("missing space after binary '$1'") if $intra_line=~m/([&])[^\sa-zA-Z_(]/; # '&' w/o following space or \w(
|
|---|
| 824 | # TODO unary '&' must not be followed by SPC
|
|---|
| 825 | report("missing space after binary '$1'") if $intra_line=~m/[^{(\[]([+\-])[^\s\d(]/; # +/- w/o following space or \d(
|
|---|
| 826 | # TODO unary '+' and '-' must not be followed by SPC
|
|---|
| 827 | report("missing space after '$2'") if $intra_line =~ m/(^|\W)(if|while|for|switch|case)[^\w\s]/; # kw w/o SPC
|
|---|
| 828 | report("missing space after '$2'") if $intra_line =~ m/(^|\W)(return)[^\w\s;]/; # return w/o SPC or ';'
|
|---|
| 829 | report("space after function/macro name")
|
|---|
| 830 | if $intra_line =~ m/(\w+)\s+\(/ # fn/macro name with space before '('
|
|---|
| 831 | && !($1 =~ m/^(sizeof|if|else|while|do|for|switch|case|default|break|continue|goto|return|void|char|signed|unsigned|int|short|long|float|double|typedef|enum|struct|union|auto|extern|static|const|volatile|register)$/) # not keyword
|
|---|
| 832 | && !(m/^\s*#\s*define\s+\w+\s+\(/); # not a macro without parameters having a body that starts with '('
|
|---|
| 833 | report("missing space before '{'") if $intra_line =~ m/[^\s{(\[]\{/; # '{' without preceding space or {([
|
|---|
| 834 | report("missing space after '}'") if $intra_line =~ m/\}[^\s,;\])}]/; # '}' without following space or ,;])}
|
|---|
| 835 | }
|
|---|
| 836 |
|
|---|
| 837 | # adapt required indentation @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 838 |
|
|---|
| 839 | s/(\w*ASN1_[A-Z_]+END\w*([^(]|\(.*?\)|$))/$1;/g; # treat *ASN1_*END*(..) macro calls as if followed by ';'
|
|---|
| 840 |
|
|---|
| 841 | my $nested_indents_position = 0;
|
|---|
| 842 |
|
|---|
| 843 | # update indents according to leading closing brace(s) '}' or label or switch case
|
|---|
| 844 | my $in_stmt = $in_expr || @nested_symbols != 0 || $in_typedecl != 0;
|
|---|
| 845 | if ($in_stmt) { # expr/stmt/type decl/var def/fn hdr, i.e., not at block level
|
|---|
| 846 | if (m/^([\s@]*\})/) { # leading '}' within stmt, any preceding blinded comment must not be matched
|
|---|
| 847 | $in_block_decls = -1;
|
|---|
| 848 | my $head = $1;
|
|---|
| 849 | update_nested_indents($head);
|
|---|
| 850 | $nested_indents_position = length($head);
|
|---|
| 851 | if (@nested_symbols >= 1) {
|
|---|
| 852 | $hanging_symbol = @nested_symbols[-1];
|
|---|
| 853 | $expr_indent = @nested_indents[-1];
|
|---|
| 854 | } else { # typically end of initialiizer expr or enum
|
|---|
| 855 | $expr_indent = 0;
|
|---|
| 856 | }
|
|---|
| 857 | } elsif (m/^([\s@]*)(static_)?ASN1_ITEM_TEMPLATE_END(\W|$)/) { # workaround for ASN1 macro indented as '}'
|
|---|
| 858 | $local_offset = -INDENT_LEVEL;
|
|---|
| 859 | $expr_indent = 0;
|
|---|
| 860 | } elsif (m/;.*?\}/) { # expr ends with ';' before '}'
|
|---|
| 861 | report("code before '}'");
|
|---|
| 862 | }
|
|---|
| 863 | }
|
|---|
| 864 | if (@in_do_hanging_offsets != 0 && # note there is nothing like "unexpected 'while'"
|
|---|
| 865 | m/^[\s@]*while(\W|$)/) { # leading 'while'
|
|---|
| 866 | $hanging_offset = pop @in_do_hanging_offsets;
|
|---|
| 867 | }
|
|---|
| 868 | if ($if_maybe_terminated) {
|
|---|
| 869 | if (m/(^|\W)else(\W|$)/) { # (not necessarily leading) 'else'
|
|---|
| 870 | if (@in_if_hanging_offsets == 0) {
|
|---|
| 871 | report("unexpected 'else'");
|
|---|
| 872 | } else {
|
|---|
| 873 | $hanging_offset = pop @in_if_hanging_offsets;
|
|---|
| 874 | }
|
|---|
| 875 | } else {
|
|---|
| 876 | @in_if_hanging_offsets = (); # note there is nothing like "unclosed 'if'"
|
|---|
| 877 | $hanging_offset = 0;
|
|---|
| 878 | }
|
|---|
| 879 | }
|
|---|
| 880 | if (!$in_stmt) { # at block level, i.e., outside expr/stmt/type decl/var def/fn hdr
|
|---|
| 881 | $if_maybe_terminated = 0;
|
|---|
| 882 | if (my ($head, $before, $tail) = m/^([\s@]*([^{}]*)\})[\s@]*(.*)$/) { # leading closing '}', but possibly
|
|---|
| 883 | # with non-whitespace non-'{' before
|
|---|
| 884 | report("code after '}'") unless $tail eq "" || $tail =~ m/(else|while|OSSL_TRACE_END)(\W|$)/;
|
|---|
| 885 | my $outermost_level = @nested_block_indents == 1 && @nested_block_indents[0] == 0;
|
|---|
| 886 | if (!$sloppy_bodylen && $outermost_level && $line_body_start != 0) {
|
|---|
| 887 | my $body_len = $line - $line_body_start - 1;
|
|---|
| 888 | report_flexibly($line_function_start, "function body length = $body_len > ".MAX_BODY_LENGTH." lines",
|
|---|
| 889 | $last_function_header) if $body_len > MAX_BODY_LENGTH;
|
|---|
| 890 | $line_body_start = 0;
|
|---|
| 891 | }
|
|---|
| 892 | if ($before ne "") { # non-whitespace non-'{' before '}'
|
|---|
| 893 | report("code before '}'");
|
|---|
| 894 | } else { # leading '}' outside stmt, any preceding blinded comment must not be matched
|
|---|
| 895 | $in_block_decls = -1;
|
|---|
| 896 | $local_offset = $block_indent + $hanging_offset - INDENT_LEVEL;
|
|---|
| 897 | update_nested_indents($head);
|
|---|
| 898 | $nested_indents_position = length($head);
|
|---|
| 899 | $local_offset -= ($block_indent + $hanging_offset);
|
|---|
| 900 | # in effect $local_offset = -INDENT_LEVEL relative to $block_indent + $hanging_offset values before
|
|---|
| 901 | }
|
|---|
| 902 | }
|
|---|
| 903 |
|
|---|
| 904 | # handle opening brace '{' after if/else/while/for/switch/do on line before
|
|---|
| 905 | if ($hanging_offset > 0 && m/^[\s@]*{/ && # leading opening '{'
|
|---|
| 906 | $line_before > 0 &&
|
|---|
| 907 | $contents_before_ =~ m/(^|^.*\W)(if|else|while|for|switch|do)(\W.*$|$)/) {
|
|---|
| 908 | $keyword_opening_brace = $1;
|
|---|
| 909 | $hanging_offset -= INDENT_LEVEL; # cancel newly hanging_offset
|
|---|
| 910 | }
|
|---|
| 911 |
|
|---|
| 912 | if (m/^[\s@]*(case|default)(\W.*$|$)/) { # leading 'case' or 'default'
|
|---|
| 913 | my $keyword = $1;
|
|---|
| 914 | report("code after $keyword: ") if $2 =~ /:.*[^\s@].*$/;
|
|---|
| 915 | $local_offset = -INDENT_LEVEL;
|
|---|
| 916 | } else {
|
|---|
| 917 | if (m/^([\s@]*)(\w+):/) { # (leading) label, cannot be "default"
|
|---|
| 918 | $local_offset = -INDENT_LEVEL;
|
|---|
| 919 | $has_label = 1;
|
|---|
| 920 | }
|
|---|
| 921 | }
|
|---|
| 922 | }
|
|---|
| 923 |
|
|---|
| 924 | # potential adaptations of indent in first line of macro body in multi-line macro definition
|
|---|
| 925 | if ($in_preproc != 0 && $in_macro_header > 0) {
|
|---|
| 926 | if ($in_macro_header > 1) { # still in macro definition header
|
|---|
| 927 | $in_macro_header += parens_balance($_);
|
|---|
| 928 | } else { # begin of macro body
|
|---|
| 929 | $in_macro_header = 0;
|
|---|
| 930 | if ($count == $block_indent - $preproc_offset # body began with same indentation as preceding code
|
|---|
| 931 | && $sloppy_macro) { # workaround for this situation is enabled
|
|---|
| 932 | $block_indent -= $preproc_offset;
|
|---|
| 933 | $preproc_offset = 0;
|
|---|
| 934 | }
|
|---|
| 935 | }
|
|---|
| 936 | }
|
|---|
| 937 |
|
|---|
| 938 | # check required indentation @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 939 |
|
|---|
| 940 | check_indent() if $count >= 0; # not for start of preprocessor directive and not if multi-line string literal is continued
|
|---|
| 941 |
|
|---|
| 942 | # check for blank lines within/after local decls @@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 943 |
|
|---|
| 944 | if ($in_block_decls >= 0 &&
|
|---|
| 945 | $in_comment == 0 && !m/^\s*\*?@/ && # not in a multi-line or intra-line comment
|
|---|
| 946 | !$in_expr && $expr_indent == 0 && $in_typedecl == 0) {
|
|---|
| 947 | my $blank_line_before = $line > 1 && $code_contents_before =~ m/^\s*(\\\s*)?$/;
|
|---|
| 948 | # essentially blank line before: just whitespace and maybe a '\'
|
|---|
| 949 | if (m/^[\s(]*(char|signed|unsigned|int|short|long|float|double|enum|struct|union|auto|extern|static|const|volatile|register)(\W|$)/ # clear start of local decl
|
|---|
| 950 | || (m/^(\s*(\w+|\[\]|[\*()]))+?\s+[\*\(]*\w+(\s*(\)|\[[^\]]*\]))*\s*[;,=]/ # weak check for decl involving user-defined type
|
|---|
| 951 | && !m/^\s*(\}|sizeof|if|else|while|do|for|switch|case|default|break|continue|goto|return)(\W|$)/)) {
|
|---|
| 952 | $in_block_decls++;
|
|---|
| 953 | report_flexibly($line - 1, "blank line within local decls, before", $contents) if $blank_line_before;
|
|---|
| 954 | } else {
|
|---|
| 955 | report_flexibly($line, "missing blank line after local decls", "\n$contents_before$contents")
|
|---|
| 956 | if $in_block_decls > 0 && !$blank_line_before;
|
|---|
| 957 | $in_block_decls = -1 unless
|
|---|
| 958 | m/^\s*(\\\s*)?$/ # essentially blank line: just whitespace (and maybe a trailing '\')
|
|---|
| 959 | || $in_comment != 0 || m/^\s*\*?@/; # in multi-line comment or an intra-line comment
|
|---|
| 960 | }
|
|---|
| 961 | }
|
|---|
| 962 |
|
|---|
| 963 | $in_comment = 0 if $in_comment < 0; # multi-line comment has ended
|
|---|
| 964 |
|
|---|
| 965 | # do some further checks @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 966 |
|
|---|
| 967 | my $outermost_level = $block_indent - $preproc_offset == 0;
|
|---|
| 968 |
|
|---|
| 969 | report("more than one stmt") if !m/(^|\W)for(\W.*|$)/ && # no 'for' - TODO improve matching
|
|---|
| 970 | m/;.*;/; # two or more terminators ';', so more than one statement
|
|---|
| 971 |
|
|---|
| 972 | # check for code block containing a single line/statement
|
|---|
| 973 | if ($line_before2 > 0 && !$outermost_level && # within function body
|
|---|
| 974 | $in_typedecl == 0 && @nested_indents == 0 && # neither within type declaration nor inside stmt/expr
|
|---|
| 975 | m/^[\s@]*\}/) { # leading closing brace '}', any preceding blinded comment must not be matched
|
|---|
| 976 | # TODO extend detection from single-line to potentially multi-line statement
|
|---|
| 977 | if ($line_opening_brace > 0 &&
|
|---|
| 978 | ($line_opening_brace == $line_before2 ||
|
|---|
| 979 | $line_opening_brace == $line_before)
|
|---|
| 980 | && $contents_before =~ m/;/) { # there is at least one terminator ';', so there is some stmt
|
|---|
| 981 | # TODO do not report cases where a further else branch
|
|---|
| 982 | # follows with a block containing more than one line/statement
|
|---|
| 983 | report_flexibly($line_before, "'$keyword_opening_brace' { 1 stmt }", $contents_before);
|
|---|
| 984 | }
|
|---|
| 985 | }
|
|---|
| 986 |
|
|---|
| 987 | report("single-letter name '$2'") if (m/(^|.*\W)([IO])(\W.*|$)/); # single-letter name 'I' or 'O' # maybe re-add 'l'?
|
|---|
| 988 | # constant on LHS of comparison or assignment, e.g., NULL != x or 'a' < c, but not a + 1 == b
|
|---|
| 989 | report("constant on LHS of '$3'")
|
|---|
| 990 | if (m/(['"]|([\+\-\*\/\/%\&\|\^<>]\s*)?\W[0-9]+L?|\WNULL)\s*([\!<>=]=|[<=>])([<>]?)/ &&
|
|---|
| 991 | $2 eq "" && (($3 ne "<" && $3 ne "='" && $3 ne ">") || $4 eq ""));
|
|---|
| 992 |
|
|---|
| 993 | # TODO report needless use of parentheses, while
|
|---|
| 994 | # macro parameters should always be in parens (except when passed on), e.g., '#define ID(x) (x)'
|
|---|
| 995 |
|
|---|
| 996 | # adapt required indentation for following lines @@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 997 |
|
|---|
| 998 | # set $in_expr, $in_paren_expr, and $hanging_offset for if/while/for/switch, return/enum, and assignment RHS
|
|---|
| 999 | my $paren_expr_start = 0;
|
|---|
| 1000 | my $return_enum_start = 0;
|
|---|
| 1001 | my $assignment_start = 0;
|
|---|
| 1002 | my $tmp = $_;
|
|---|
| 1003 | $tmp =~ s/[\!<>=]=/@@/g; # blind (in-)equality symbols like '<=' as '@@' to prevent matching them as '=' below
|
|---|
| 1004 | if (m/^((^|.*\W)(if|while|for|switch))(\W.*|$)$/) { # (last) if/for/while/switch
|
|---|
| 1005 | $paren_expr_start = 1;
|
|---|
| 1006 | } elsif (m/^((^|.*\W)(return|enum))(\W.*|$)/ # (last) return/enum
|
|---|
| 1007 | && !$in_expr && @nested_indents == 0 && parens_balance($1) == 0) { # not nested enum
|
|---|
| 1008 | $return_enum_start = 1;
|
|---|
| 1009 | } elsif ($tmp =~ m/^(([^=]*)(=))(.*)$/ # (last) '=', i.e., assignment
|
|---|
| 1010 | && !$in_expr && @nested_indents == 0 && parens_balance($1) == 0) { # not nested assignment
|
|---|
| 1011 | $assignment_start = 1;
|
|---|
| 1012 | }
|
|---|
| 1013 | if ($paren_expr_start || $return_enum_start || $assignment_start)
|
|---|
| 1014 | {
|
|---|
| 1015 | my ($head, $mid, $tail) = ($1, $3, $4);
|
|---|
| 1016 | $keyword_opening_brace = $mid if $mid ne "=";
|
|---|
| 1017 | # to cope with multi-line expressions, do this also if !($tail =~ m/\{/)
|
|---|
| 1018 | push @in_if_hanging_offsets, $hanging_offset if $mid eq "if";
|
|---|
| 1019 |
|
|---|
| 1020 | # already handle $head, i.e., anything before expression
|
|---|
| 1021 | update_nested_indents($head, $nested_indents_position);
|
|---|
| 1022 | $nested_indents_position = length($head);
|
|---|
| 1023 | # now can set $in_expr and $in_paren_expr
|
|---|
| 1024 | $in_expr = 1;
|
|---|
| 1025 | $in_paren_expr = 1 if $paren_expr_start;
|
|---|
| 1026 | if ($mid eq "while" && @in_do_hanging_offsets != 0) {
|
|---|
| 1027 | $hanging_offset = pop @in_do_hanging_offsets;
|
|---|
| 1028 | } else {
|
|---|
| 1029 | $hanging_offset += INDENT_LEVEL; # tentatively set hanging_offset, may be canceled by following '{'
|
|---|
| 1030 | }
|
|---|
| 1031 | }
|
|---|
| 1032 |
|
|---|
| 1033 | # set $hanging_offset and $keyword_opening_brace for do/else
|
|---|
| 1034 | if (my ($head, $mid, $tail) = m/(^|^.*\W)(else|do)(\W.*|$)$/) { # last else/do, where 'do' is preferred, but not #else
|
|---|
| 1035 | my $code_before = $head =~ m/[^\s\@}]/; # leading non-whitespace non-comment non-'}'
|
|---|
| 1036 | report("code before '$mid'") if $code_before;
|
|---|
| 1037 | report("code after '$mid'" ) if $tail =~ m/[^\s\@{]/# trailing non-whitespace non-comment non-'{' (non-'\')
|
|---|
| 1038 | && !($mid eq "else" && $tail =~ m/[\s@]*if(\W|$)/);
|
|---|
| 1039 | if ($mid eq "do") { # workarounds for code before 'do'
|
|---|
| 1040 | if ($head =~ m/(^|^.*\W)(else)(\W.*$|$)/) { # 'else' ... 'do'
|
|---|
| 1041 | $hanging_offset += INDENT_LEVEL; # tentatively set hanging_offset, may be canceled by following '{'
|
|---|
| 1042 | }
|
|---|
| 1043 | if ($head =~ m/;/) { # terminator ';' ... 'do'
|
|---|
| 1044 | @in_if_hanging_offsets = (); # note there is nothing like "unclosed 'if'"
|
|---|
| 1045 | $hanging_offset = 0;
|
|---|
| 1046 | }
|
|---|
| 1047 | }
|
|---|
| 1048 | push @in_do_hanging_offsets, $hanging_offset if $mid eq "do";
|
|---|
| 1049 | if ($code_before && $mid eq "do") {
|
|---|
| 1050 | $hanging_offset = length($head) - $block_indent;
|
|---|
| 1051 | }
|
|---|
| 1052 | if (!$in_paren_expr) {
|
|---|
| 1053 | $keyword_opening_brace = $mid if $tail =~ m/\{/;
|
|---|
| 1054 | $hanging_offset += INDENT_LEVEL;
|
|---|
| 1055 | }
|
|---|
| 1056 | }
|
|---|
| 1057 |
|
|---|
| 1058 | # set $in_typedecl and potentially $hanging_offset for type declaration
|
|---|
| 1059 | if (!$in_expr && @nested_indents == 0 # not in expression
|
|---|
| 1060 | && m/(^|^.*\W)(typedef|enum|struct|union)(\W.*|$)$/
|
|---|
| 1061 | && parens_balance($1) == 0 # not in newly started expression or function arg list
|
|---|
| 1062 | && ($2 eq "typedef" || !($3 =~ m/\s*\w++\s*(.)/ && $1 ne "{")) # 'struct'/'union'/'enum' <name> not followed by '{'
|
|---|
| 1063 | # not needed: && $keyword_opening_brace = $2 if $3 =~ m/\{/;
|
|---|
| 1064 | ) {
|
|---|
| 1065 | $in_typedecl++;
|
|---|
| 1066 | $hanging_offset += INDENT_LEVEL if m/\*.*\(/; # '*' followed by '(' - seems consistent with Emacs C mode
|
|---|
| 1067 | }
|
|---|
| 1068 |
|
|---|
| 1069 | my $local_in_expr = $in_expr;
|
|---|
| 1070 | my $terminator_position = update_nested_indents($_, $nested_indents_position);
|
|---|
| 1071 |
|
|---|
| 1072 | if ($local_in_expr) {
|
|---|
| 1073 | # on end of non-if/while/for/switch (multi-line) expression (i.e., return/enum/assignment) and
|
|---|
| 1074 | # on end of statement/type declaration/variable definition/function header
|
|---|
| 1075 | if ($terminator_position >= 0 && ($in_typedecl == 0 || @nested_indents == 0)) {
|
|---|
| 1076 | check_nested_nonblock_indents("expr");
|
|---|
| 1077 | $in_expr = 0;
|
|---|
| 1078 | }
|
|---|
| 1079 | } else {
|
|---|
| 1080 | check_nested_nonblock_indents($in_typedecl == 0 ? "stmt" : "decl") if $terminator_position >= 0;
|
|---|
| 1081 | }
|
|---|
| 1082 |
|
|---|
| 1083 | # on ';', which terminates the current statement/type declaration/variable definition/function declaration
|
|---|
| 1084 | if ($terminator_position >= 0) {
|
|---|
| 1085 | my $tail = substr($_, $terminator_position + 1);
|
|---|
| 1086 | if (@in_if_hanging_offsets != 0) {
|
|---|
| 1087 | if ($tail =~ m/\s*else(\W|$)/) {
|
|---|
| 1088 | pop @in_if_hanging_offsets;
|
|---|
| 1089 | $hanging_offset -= INDENT_LEVEL;
|
|---|
| 1090 | } elsif ($tail =~ m/[^\s@]/) { # code (not just comment) follows
|
|---|
| 1091 | @in_if_hanging_offsets = (); # note there is nothing like "unclosed 'if'"
|
|---|
| 1092 | $hanging_offset = 0;
|
|---|
| 1093 | } else {
|
|---|
| 1094 | $if_maybe_terminated = 1;
|
|---|
| 1095 | }
|
|---|
| 1096 | } elsif ($tail =~ m/^[\s@]*$/) { # ';' has been trailing, i.e. there is nothing but whitespace and comments
|
|---|
| 1097 | $hanging_offset = 0; # reset in case of terminated assignment ('=') etc.
|
|---|
| 1098 | }
|
|---|
| 1099 | $in_typedecl-- if $in_typedecl != 0 && @nested_in_typedecl == 0; # TODO handle multiple type decls per line
|
|---|
| 1100 | m/(;[^;]*)$/; # match last ';'
|
|---|
| 1101 | $terminator_position = length($_) - length($1) if $1;
|
|---|
| 1102 | # new $terminator_position value may be after the earlier one in case multiple terminators on current line
|
|---|
| 1103 | # TODO check treatment in case of multiple terminators on current line
|
|---|
| 1104 | update_nested_indents($_, $terminator_position + 1);
|
|---|
| 1105 | }
|
|---|
| 1106 |
|
|---|
| 1107 | # set hanging expression indent according to nested indents - TODO maybe do better in update_nested_indents()
|
|---|
| 1108 | # also if $in_expr is 0: in statement/type declaration/variable definition/function header
|
|---|
| 1109 | $expr_indent = 0;
|
|---|
| 1110 | for (my $i = -1; $i >= -@nested_symbols; $i--) {
|
|---|
| 1111 | if (@nested_symbols[$i] ne "?") { # conditionals '?' ... ':' are treated specially in check_indent()
|
|---|
| 1112 | $hanging_symbol = @nested_symbols[$i];
|
|---|
| 1113 | $expr_indent = $nested_indents[$i];
|
|---|
| 1114 | # $expr_indent is guaranteed to be != 0 unless @nested_indents contains just outer conditionals
|
|---|
| 1115 | last;
|
|---|
| 1116 | }
|
|---|
| 1117 | }
|
|---|
| 1118 |
|
|---|
| 1119 | # remember line number and header containing name of last function defined for reports w.r.t. MAX_BODY_LENGTH
|
|---|
| 1120 | if ($in_preproc == 0 && $outermost_level && m/(\w+)\s*\(/ && $1 ne "STACK_OF") {
|
|---|
| 1121 | $line_function_start = $line;
|
|---|
| 1122 | $last_function_header = $contents;
|
|---|
| 1123 | }
|
|---|
| 1124 |
|
|---|
| 1125 | # special checks for last, typically trailing opening brace '{' in line
|
|---|
| 1126 | if (my ($head, $tail) = m/^(.*)\{(.*)$/) { # match last ... '{'
|
|---|
| 1127 | if (!$in_expr && $in_typedecl == 0) {
|
|---|
| 1128 | if ($outermost_level) {
|
|---|
| 1129 | if (!$assignment_start && !$local_in_expr) {
|
|---|
| 1130 | # at end of function definition header (or stmt or var definition)
|
|---|
| 1131 | report("'{' not at line start") if length($head) != $preproc_offset && $head =~ m/\)\s*/; # at end of function definition header
|
|---|
| 1132 | $line_body_start = $contents =~ m/LONG BODY/ ? 0 : $line if $line_function_start != 0;
|
|---|
| 1133 | }
|
|---|
| 1134 | } else {
|
|---|
| 1135 | $line_opening_brace = $line if $keyword_opening_brace =~ m/do|while|for/;
|
|---|
| 1136 | # using, not assigning, $keyword_opening_brace here because it could be on an earlier line
|
|---|
| 1137 | $line_opening_brace = $line if $keyword_opening_brace =~ m/if|else/ && $extended_1_stmt &&
|
|---|
| 1138 | # TODO prevent false positives for if/else where braces around single-statement branches
|
|---|
| 1139 | # should be avoided but only if all branches have just single statements
|
|---|
| 1140 | # The following helps detecting the exception when handling multiple 'if ... else' branches:
|
|---|
| 1141 | !($keyword_opening_brace eq "else" && $line_opening_brace < $line_before2);
|
|---|
| 1142 | }
|
|---|
| 1143 | report("code after '{'") if $tail=~ m/[^\s\@]/ && # trailing non-whitespace non-comment (non-'\')
|
|---|
| 1144 | !($tail=~ m/\}/); # missing '}' after last '{'
|
|---|
| 1145 | }
|
|---|
| 1146 | }
|
|---|
| 1147 |
|
|---|
| 1148 | # check for opening brace after if/while/for/switch/do not on same line
|
|---|
| 1149 | # note that "missing '{' on same line after '} else'" is handled further below
|
|---|
| 1150 | if (/^[\s@]*{/ && # leading '{'
|
|---|
| 1151 | $line_before > 0 && !($contents_before_ =~ m/^\s*#/) && # not preprocessor directive '#if
|
|---|
| 1152 | (my ($head, $mid, $tail) = ($contents_before_ =~ m/(^|^.*\W)(if|while|for|switch|do)(\W.*$|$)/))) {
|
|---|
| 1153 | my $brace_after = $tail =~ /^[\s@]*{/; # any whitespace or comments then '{'
|
|---|
| 1154 | report("'{' not on same line as preceding '$mid'") if !$brace_after;
|
|---|
| 1155 | }
|
|---|
| 1156 | # check for closing brace on line before 'else' not followed by leading '{'
|
|---|
| 1157 | elsif (my ($head, $tail) = m/(^|^.*\W)else(\W.*$|$)/) {
|
|---|
| 1158 | if (parens_balance($tail) == 0 && # avoid false positive due to unfinished expr on current line
|
|---|
| 1159 | !($tail =~ m/{/) && # after 'else' missing '{' on same line
|
|---|
| 1160 | !($head =~ m/}[\s@]*$/) && # not: '}' then any whitespace or comments before 'else'
|
|---|
| 1161 | $line_before > 0 && $contents_before_ =~ /}[\s@]*$/) { # trailing '}' on line before
|
|---|
| 1162 | report("missing '{' on same line after '} else'");
|
|---|
| 1163 | }
|
|---|
| 1164 | }
|
|---|
| 1165 |
|
|---|
| 1166 | # check for closing brace before 'while' not on same line
|
|---|
| 1167 | if (my ($head, $tail) = m/(^|^.*\W)while(\W.*$|$)/) {
|
|---|
| 1168 | my $brace_before = $head =~ m/}[\s@]*$/; # '}' then any whitespace or comments
|
|---|
| 1169 | # possibly 'if (...)' (with potentially inner '(' and ')') then any whitespace or comments then '{'
|
|---|
| 1170 | if (!$brace_before &&
|
|---|
| 1171 | # does not work here: @in_do_hanging_offsets != 0 && #'while' terminates loop
|
|---|
| 1172 | parens_balance($tail) == 0 && # avoid false positive due to unfinished expr on current line
|
|---|
| 1173 | $tail =~ /;/ && # 'while' terminates loop (by ';')
|
|---|
| 1174 | $line_before > 0 &&
|
|---|
| 1175 | $contents_before_ =~ /}[\s@]*$/) { # on line before: '}' then any whitespace or comments
|
|---|
| 1176 | report("'while' not on same line as preceding '}'");
|
|---|
| 1177 | }
|
|---|
| 1178 | }
|
|---|
| 1179 |
|
|---|
| 1180 | # check for missing brace on same line before or after 'else'
|
|---|
| 1181 | if (my ($head, $tail) = m/(^|^.*\W)else(\W.*$|$)/) {
|
|---|
| 1182 | my $brace_before = $head =~ /}[\s@]*$/; # '}' then any whitespace or comments
|
|---|
| 1183 | my $brace_after = $tail =~ /^[\s@]*if[\s@]*\(.*\)[\s@]*{|[\s@]*{/;
|
|---|
| 1184 | # possibly 'if (...)' (with potentially inner '(' and ')') then any whitespace or comments then '{'
|
|---|
| 1185 | if (!$brace_before) {
|
|---|
| 1186 | if ($line_before > 0 && $contents_before_ =~ /}[\s@]*$/) {
|
|---|
| 1187 | report("'else' not on same line as preceding '}'");
|
|---|
| 1188 | } elsif (parens_balance($tail) == 0) { # avoid false positive due to unfinished expr on current line
|
|---|
| 1189 | report("missing '}' on same line before 'else ... {'") if $brace_after;
|
|---|
| 1190 | }
|
|---|
| 1191 | } elsif (parens_balance($tail) == 0) { # avoid false positive due to unfinished expr on current line
|
|---|
| 1192 | report("missing '{' on same line after '} else'") if $brace_before && !$brace_after;
|
|---|
| 1193 | }
|
|---|
| 1194 | }
|
|---|
| 1195 |
|
|---|
| 1196 | # on begin of multi-line preprocessor directive, adapt indent
|
|---|
| 1197 | if ($in_comment == 0 && $trailing_backslash) {
|
|---|
| 1198 | # trailing '\'typically used in preprocessor directive like '#define'
|
|---|
| 1199 | if ($in_preproc == 1) { # start of multi-line preprocessor directive
|
|---|
| 1200 | # note that backup+reset_indentation_state() has already been called
|
|---|
| 1201 | $in_macro_header = m/^\s*#\s*define(\W|$)?(.*)/ ? 1 + parens_balance($2) : 0; # '#define' is beginning
|
|---|
| 1202 | $preproc_offset = INDENT_LEVEL;
|
|---|
| 1203 | $block_indent = $preproc_offset;
|
|---|
| 1204 | }
|
|---|
| 1205 | $in_preproc += 1;
|
|---|
| 1206 | }
|
|---|
| 1207 |
|
|---|
| 1208 | # post-processing at end of line @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1209 |
|
|---|
| 1210 | LINE_FINISHED:
|
|---|
| 1211 | $code_contents_before = $contents if
|
|---|
| 1212 | !m/^\s*#(\s*)(\w+)/ && # not single-line preprocessor directive
|
|---|
| 1213 | $in_comment == 0 && !m/^\s*\*?@/; # not in a multi-line comment nor in an intra-line comment
|
|---|
| 1214 |
|
|---|
| 1215 | # on end of (possibly multi-line) preprocessor directive, adapt indent
|
|---|
| 1216 | if ($in_preproc != 0 && !$trailing_backslash) { # no trailing '\'
|
|---|
| 1217 | $in_preproc = 0;
|
|---|
| 1218 | $preproc_offset = 0;
|
|---|
| 1219 | restore_indentation_state();
|
|---|
| 1220 | }
|
|---|
| 1221 |
|
|---|
| 1222 | if ($essentially_blank_line) {
|
|---|
| 1223 | report("leading ".($1 eq "" ? "blank" :"whitespace")." line") if $line == 1 && !$sloppy_SPC;
|
|---|
| 1224 | } else {
|
|---|
| 1225 | if ($line_before > 0) {
|
|---|
| 1226 | my $linediff = $line - $line_before - 1;
|
|---|
| 1227 | report("$linediff blank lines before") if $linediff > 1 && !$sloppy_SPC;
|
|---|
| 1228 | }
|
|---|
| 1229 | $line_before2 = $line_before;
|
|---|
| 1230 | $contents_before2 = $contents_before;
|
|---|
| 1231 | $contents_before_2 = $contents_before_;
|
|---|
| 1232 | $line_before = $line;
|
|---|
| 1233 | $contents_before = $contents;
|
|---|
| 1234 | $contents_before_ = $_;
|
|---|
| 1235 | $count_before = $count;
|
|---|
| 1236 | }
|
|---|
| 1237 |
|
|---|
| 1238 | if ($self_test) { # debugging
|
|---|
| 1239 | my $should_report = $contents =~ m/\*@(\d)?/ ? 1 : 0;
|
|---|
| 1240 | $should_report = +$1 if $should_report != 0 && defined $1;
|
|---|
| 1241 | print("$ARGV:$line:$num_reports_line reports on:$contents")
|
|---|
| 1242 | if $num_reports_line != $should_report;
|
|---|
| 1243 | }
|
|---|
| 1244 | $num_reports_line = 0;
|
|---|
| 1245 |
|
|---|
| 1246 | # post-processing at end of file @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1247 |
|
|---|
| 1248 | if (eof) {
|
|---|
| 1249 | # check for essentially blank line (which may include a '\') just before EOF
|
|---|
| 1250 | report(($1 eq "\n" ? "blank line" : $2 ne "" ? "'\\'" : "whitespace")." at EOF")
|
|---|
| 1251 | if $contents =~ m/^(\s*(\\?)\s*)$/ && !$sloppy_SPC;
|
|---|
| 1252 |
|
|---|
| 1253 | # report unclosed expression-level nesting
|
|---|
| 1254 | check_nested_nonblock_indents("expr at EOF"); # also adapts @nested_block_indents
|
|---|
| 1255 |
|
|---|
| 1256 | # sanity-check balance of block-level { ... } via final $block_indent at end of file
|
|---|
| 1257 | report_flexibly($line, +@nested_block_indents." unclosed '{'", "(EOF)\n") if @nested_block_indents != 0;
|
|---|
| 1258 |
|
|---|
| 1259 | # sanity-check balance of #if ... #endif via final preprocessor directive indent at end of file
|
|---|
| 1260 | report_flexibly($line, "$preproc_if_nesting unclosed '#if'", "(EOF)\n") if $preproc_if_nesting != 0;
|
|---|
| 1261 |
|
|---|
| 1262 | reset_file_state();
|
|---|
| 1263 | }
|
|---|
| 1264 | }
|
|---|
| 1265 |
|
|---|
| 1266 | # final summary report @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|
|---|
| 1267 |
|
|---|
| 1268 | my $num_other_reports = $num_reports - $num_indent_reports - $num_nesting_issues
|
|---|
| 1269 | - $num_syntax_issues - $num_SPC_reports - $num_length_reports;
|
|---|
| 1270 | print "$num_reports ($num_indent_reports indentation, $num_nesting_issues '#if' nesting indent, ".
|
|---|
| 1271 | "$num_syntax_issues syntax, $num_SPC_reports whitespace, $num_length_reports length, $num_other_reports other)".
|
|---|
| 1272 | " issues have been found by $0\n" if $num_reports != 0 && !$self_test;
|
|---|
