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tools: add cpplint rule for NULL usage

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This commit is a suggestion for adding a rule for NULL usages in the
code base. This will currently report a number of errors which could be
ignored using // NOLINT (readability/null_usage)

PR-URL: https://github.com/nodejs/node/pull/17373
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
This commit is contained in:
Daniel Bevenius 2017-11-28 18:04:49 +01:00
parent e32bbbf4d7
commit 12c8b4d154
8 changed files with 49 additions and 19 deletions
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25
tools/cpplint.py vendored
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@ -499,7 +499,6 @@ _ALT_TOKEN_REPLACEMENT = {
_ALT_TOKEN_REPLACEMENT_PATTERN = re.compile(
r'[ =()](' + ('|'.join(_ALT_TOKEN_REPLACEMENT.keys())) + r')(?=[ (]|$)')
# These constants define types of headers for use with
# _IncludeState.CheckNextIncludeOrder().
_C_SYS_HEADER = 1
@ -526,6 +525,8 @@ _SEARCH_C_FILE = re.compile(r'\b(?:LINT_C_FILE|'
# Match string that indicates we're working on a Linux Kernel file.
_SEARCH_KERNEL_FILE = re.compile(r'\b(?:LINT_KERNEL_FILE)')
_NULL_TOKEN_PATTERN = re.compile(r'\bNULL\b')
_regexp_compile_cache = {}
# {str, set(int)}: a map from error categories to sets of linenumbers
@ -4156,6 +4157,27 @@ def CheckAltTokens(filename, clean_lines, linenum, error):
'Use operator %s instead of %s' % (
_ALT_TOKEN_REPLACEMENT[match.group(1)], match.group(1)))
def CheckNullTokens(filename, clean_lines, linenum, error):
"""Check NULL usage.
Args:
filename: The name of the current file.
clean_lines: A CleansedLines instance containing the file.
linenum: The number of the line to check.
error: The function to call with any errors found.
"""
line = clean_lines.elided[linenum]
# Avoid preprocessor lines
if Match(r'^\s*#', line):
return
if line.find('/*') >= 0 or line.find('*/') >= 0:
return
for match in _NULL_TOKEN_PATTERN.finditer(line):
error(filename, linenum, 'readability/null_usage', 2,
'Use nullptr instead of NULL')
def GetLineWidth(line):
"""Determines the width of the line in column positions.
@ -4294,6 +4316,7 @@ def CheckStyle(filename, clean_lines, linenum, file_extension, nesting_state,
CheckSpacingForFunctionCall(filename, clean_lines, linenum, error)
CheckCheck(filename, clean_lines, linenum, error)
CheckAltTokens(filename, clean_lines, linenum, error)
CheckNullTokens(filename, clean_lines, linenum, error)
classinfo = nesting_state.InnermostClass()
if classinfo:
CheckSectionSpacing(filename, clean_lines, classinfo, linenum, error)