tartrazine/content.go

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package slinguist
import (
"path/filepath"
"gopkg.in/toqueteos/substring.v1"
)
func GetLanguageByContent(filename string, content []byte) (lang string, safe bool) {
if fnMatcher, ok := matchers[filepath.Ext(filename)]; ok {
lang, safe = fnMatcher(content)
return
}
return GetLanguageByExtension(filename)
}
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type languageMatcher func([]byte) (string, bool)
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var matchers = map[string]languageMatcher{
".cl": clExtLanguage,
".inc": incExtLanguage,
".cls": clsExtLanguage,
".m": mExtLanguage,
".ms": msExtLanguage,
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".md": mdExtLanguage,
".fs": fsExtLanguage,
".h": hExtLanguage,
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".hh": hhExtLanguage,
".l": lExtLanguage,
".n": nExtLanguage,
".lisp": lispExtLanguage,
".lsp": lispExtLanguage,
".pm": pmExtLanguage,
".t": pmExtLanguage,
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".rs": rsExtLanguage,
".pl": plExtLanguage,
".pro": proExtLanguage,
".toc": tocExtLanguage,
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".sls": slsExtLanguage,
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}
var (
cPlusPlusMatcher = substring.BytesOr(
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substring.BytesRegexp(`\s*template\s*<`),
substring.BytesRegexp(`\s*#\s*include <(cstdint|string|vector|map|list|array|bitset|queue|stack|forward_list|unordered_map|unordered_set|(i|o|io)stream)>`),
substring.BytesRegexp(`\n[ \t]*try`),
substring.BytesRegexp(`\n[ \t]*(class|(using[ \t]+)?namespace)\s+\w+`),
substring.BytesRegexp(`\n[ \t]*(private|public|protected):$`),
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substring.BytesRegexp(`std::\w+`),
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substring.BytesRegexp(`[ \t]*catch\s*`),
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)
)
func incExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`^<\?(?:php)?`).Match(input) {
return "PHP", true
}
return OtherLanguage, true
}
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func fsExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`\n(: |new-device)`).Match(input) {
return "Forth", true
} else if substring.BytesRegexp(`\s*(#light|import|let|module|namespace|open|type)`).Match(input) {
return "F#", true
} else if substring.BytesRegexp(`(#version|precision|uniform|varying|vec[234])`).Match(input) {
return "GLSL", true
} else if substring.BytesRegexp(`#include|#pragma\s+(rs|version)|__attribute__`).Match(input) {
return "Filterscript", true
}
return OtherLanguage, true
}
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func hExtLanguage(input []byte) (string, bool) {
if objectiveCMatcher.Match(input) {
return "Objective-C", true
} else if cPlusPlusMatcher.Match(input) {
return "C++", true
}
return "C", true
}
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func hhExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`^<\?(?:hh)?`).Match(input) {
return "Hack", true
} else if cPlusPlusMatcher.Match(input) {
return "C++", true
}
return OtherLanguage, false
}
func msExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`[.'][a-z][a-z](\s|$)`).Match(input) {
return "Groff", true
}
return "MAXScript", true
}
func nExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`^[.']`).Match(input) {
return "Groff", true
} else if substring.BytesRegexp(`(module|namespace|using)`).Match(input) {
return "Nemerle", true
}
return OtherLanguage, false
}
func lExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`\(def(un|macro)\s`).Match(input) {
return "Common Lisp", true
} else if substring.BytesRegexp(`(%[%{}]xs|<.*>)`).Match(input) {
return "Lex", true
} else if substring.BytesRegexp(`\.[a-z][a-z](\s|$)`).Match(input) {
return "Groff", true
} else if substring.BytesRegexp(`(de|class|rel|code|data|must)`).Match(input) {
return "PicoLisp", true
}
return OtherLanguage, false
}
func lispExtLanguage(input []byte) (string, bool) {
if commonLispMatcher.Match(input) {
return "Common Lisp", true
} else if substring.BytesRegexp(`\s*\(define `).Match(input) {
return "NewLisp", true
}
return OtherLanguage, false
}
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var (
commonLispMatcher = substring.BytesRegexp("(?i)(defpackage|defun|in-package)")
coolMatcher = substring.BytesRegexp("(?i)class")
openCLMatcher = substring.BytesOr(
substring.BytesHas("\n}"),
substring.BytesHas("}\n"),
substring.BytesHas(`/*`),
substring.BytesHas(`//`),
)
)
func clExtLanguage(input []byte) (string, bool) {
if commonLispMatcher.Match(input) {
return "Common Lisp", true
} else if coolMatcher.Match(input) {
return "Cool", true
} else if openCLMatcher.Match(input) {
return "OpenCL", true
}
return OtherLanguage, false
}
var (
apexMatcher = substring.BytesOr(
substring.BytesHas("{\n"),
substring.BytesHas("}\n"),
)
texMatcher = substring.BytesOr(
substring.BytesHas(`%`),
substring.BytesHas(`\`),
)
openEdgeABLMatcher = substring.BytesRegexp(`(?i)(class|define|interface|method|using)\b`)
visualBasicMatcher = substring.BytesOr(
substring.BytesHas("'*"),
substring.BytesRegexp(`(?i)(attribute|option|sub|private|protected|public|friend)\b`),
)
)
func clsExtLanguage(input []byte) (string, bool) {
if texMatcher.Match(input) {
return "TeX", true
} else if visualBasicMatcher.Match(input) {
return "Visual Basic", true
} else if openEdgeABLMatcher.Match(input) {
return "OpenEdge ABL", true
} else if apexMatcher.Match(input) {
return "Apex", true
}
return OtherLanguage, false
}
var (
mathematicaMatcher = substring.BytesHas(`\s*\(\*`)
matlabMatcher = substring.BytesRegexp(`\b(function\s*[\[a-zA-Z]+|pcolor|classdef|figure|end|elseif)\b`)
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objectiveCMatcher = substring.BytesRegexp(
`@(interface|class|protocol|property|end|synchronised|selector|implementation)\b|#import\s+.+\.h[">]`)
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)
func mExtLanguage(input []byte) (string, bool) {
if objectiveCMatcher.Match(input) {
return "Objective-C", true
} else if matlabMatcher.Match(input) {
return "Matlab", true
} else if mathematicaMatcher.Match(input) {
return "Mathematica", true
}
return OtherLanguage, false
}
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func mdExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`\n[-a-z0-9=#!\*\[|]`).Match(input) {
return "Markdown", true
} else if substring.BytesRegexp(`\n(;;|\(define_)`).Match(input) {
return "GCC Machine Description", true
}
return OtherLanguage, false
}
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var (
prologMatcher = substring.BytesRegexp(`^[^#]+:-`)
perlMatcher = substring.BytesRegexp(`use strict|use\s+v?5\.`)
perl6Matcher = substring.BytesRegexp(`(use v6|(my )?class|module)`)
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)
func plExtLanguage(input []byte) (string, bool) {
if prologMatcher.Match(input) {
return "Prolog", true
} else if perl6Matcher.Match(input) {
return "Perl6", true
}
return "Perl", false
}
func pmExtLanguage(input []byte) (string, bool) {
if perlMatcher.Match(input) {
return "Perl", true
} else if perl6Matcher.Match(input) {
return "Perl6", true
}
return "Perl", false
}
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func rsExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp(`(use |fn |mod |pub |macro_rules|impl|#!?\[)`).Match(input) {
return "Rust", true
} else if substring.BytesRegexp(`#include|#pragma\s+(rs|version)|__attribute__`).Match(input) {
return "RenderScript", true
}
return OtherLanguage, false
}
func proExtLanguage(input []byte) (string, bool) {
if prologMatcher.Match(input) {
return "Prolog", true
}
return OtherLanguage, false
}
func tocExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp("## |@no-lib-strip@").Match(input) {
return "World of Warcraft Addon Data", true
} else if substring.BytesRegexp("(contentsline|defcounter|beamer|boolfalse)").Match(input) {
return "TeX", true
}
return OtherLanguage, false
}
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func slsExtLanguage(input []byte) (string, bool) {
if substring.BytesRegexp("## |@no-lib-strip@").Match(input) {
return "World of Warcraft Addon Data", true
} else if substring.BytesRegexp("(contentsline|defcounter|beamer|boolfalse)").Match(input) {
return "TeX", true
}
return OtherLanguage, false
}