179 lines
4.2 KiB
Python
179 lines
4.2 KiB
Python
"""
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pygments.lexers.asn1
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~~~~~~~~~~~~~~~~~~~~
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Pygments lexers for ASN.1.
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:copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import re
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from pygments.token import Comment, Operator, Keyword, Name, String, \
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Number, Punctuation, Whitespace
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from pygments.lexer import RegexLexer, words, bygroups
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__all__ = ['Asn1Lexer']
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SINGLE_WORD_KEYWORDS = [
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"ENCODED",
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"ABSTRACT-SYNTAX",
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"END",
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"APPLICATION",
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"EXPLICIT",
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"IMPLICIT",
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"AUTOMATIC",
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"TAGS",
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"BEGIN",
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"EXTENSIBILITY",
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"BY",
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"FROM",
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"COMPONENT",
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"UNIVERSAL",
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"COMPONENTS",
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"CONSTRAINED",
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"IMPLIED",
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"DEFINITIONS",
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"INCLUDES",
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"PRIVATE",
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"WITH",
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"OF",
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]
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OPERATOR_WORDS = [
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"EXCEPT",
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"UNION",
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"INTERSECTION",
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]
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SINGLE_WORD_NAMESPACE_KEYWORDS = [
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"EXPORTS",
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"IMPORTS",
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]
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MULTI_WORDS_DECLARATIONS = [
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"SEQUENCE OF",
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"SET OF",
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"INSTANCE OF",
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"WITH SYNTAX",
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]
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SINGLE_WORDS_DECLARATIONS = [
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"SIZE",
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"SEQUENCE",
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"SET",
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"CLASS",
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"UNIQUE",
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"DEFAULT",
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"CHOICE",
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"PATTERN",
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"OPTIONAL",
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"PRESENT",
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"ABSENT",
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"CONTAINING",
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"ENUMERATED",
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"ALL",
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]
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TWO_WORDS_TYPES = [
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"OBJECT IDENTIFIER",
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"BIT STRING",
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"OCTET STRING",
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"CHARACTER STRING",
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"EMBEDDED PDV",
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]
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SINGLE_WORD_TYPES = [
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"RELATIVE-OID",
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"TYPE-IDENTIFIER",
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"ObjectDescriptor",
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"IA5String",
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"INTEGER",
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"ISO646String",
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"T61String",
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"BMPString",
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"NumericString",
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"TeletexString",
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"GeneralizedTime",
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"REAL",
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"BOOLEAN",
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"GeneralString",
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"GraphicString",
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"UniversalString",
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"UTCTime",
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"VisibleString",
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"UTF8String",
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"PrintableString",
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"VideotexString",
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"EXTERNAL",
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]
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def word_sequences(tokens):
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return "(" + '|'.join(token.replace(' ', r'\s+') for token in tokens) + r')\b'
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class Asn1Lexer(RegexLexer):
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"""
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Lexer for ASN.1 module definition
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"""
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flags = re.MULTILINE
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name = 'ASN.1'
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aliases = ['asn1']
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filenames = ["*.asn1"]
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url = "https://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf"
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version_added = '2.16'
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tokens = {
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'root': [
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# Whitespace:
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(r'\s+', Whitespace),
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# Comments:
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(r'--.*$', Comment.Single),
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(r'/\*', Comment.Multiline, 'comment'),
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# Numbers:
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(r'\d+\.\d*([eE][-+]?\d+)?', Number.Float),
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(r'\d+', Number.Integer),
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# Identifier:
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(r"&?[a-z][-a-zA-Z0-9]*[a-zA-Z0-9]\b", Name.Variable),
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# Constants:
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(words(("TRUE", "FALSE", "NULL", "MINUS-INFINITY", "PLUS-INFINITY", "MIN", "MAX"), suffix=r'\b'), Keyword.Constant),
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# Builtin types:
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(word_sequences(TWO_WORDS_TYPES), Keyword.Type),
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(words(SINGLE_WORD_TYPES, suffix=r'\b'), Keyword.Type),
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# Other keywords:
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(r"EXPORTS\s+ALL\b", Keyword.Namespace),
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(words(SINGLE_WORD_NAMESPACE_KEYWORDS, suffix=r'\b'), Operator.Namespace),
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(word_sequences(MULTI_WORDS_DECLARATIONS), Keyword.Declaration),
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(words(SINGLE_WORDS_DECLARATIONS, suffix=r'\b'), Keyword.Declaration),
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(words(OPERATOR_WORDS, suffix=r'\b'), Operator.Word),
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(words(SINGLE_WORD_KEYWORDS), Keyword),
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# Type identifier:
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(r"&?[A-Z][-a-zA-Z0-9]*[a-zA-Z0-9]\b", Name.Type),
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# Operators:
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(r"(::=|\.\.\.|\.\.|\[\[|\]\]|\||\^)", Operator),
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# Punctuation:
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(r"(\.|,|\{|\}|\(|\)|\[|\])", Punctuation),
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# String:
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(r'"', String, 'string'),
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# Binary string:
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(r"('[01 ]*')(B)\b", bygroups(String, String.Affix)),
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(r"('[0-9A-F ]*')(H)\b",bygroups(String, String.Affix)),
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],
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'comment': [
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(r'[^*/]+', Comment.Multiline),
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(r'/\*', Comment.Multiline, '#push'),
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(r'\*/', Comment.Multiline, '#pop'),
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(r'[*/]', Comment.Multiline)
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],
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'string': [
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(r'""', String),
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(r'"', String, "#pop"),
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(r'[^"]', String),
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]
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}
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