package slinguist

// CODE GENERATED AUTOMATICALLY WITH github.com/src-d/simple-linguist/cli/slinguist-generate
// THIS FILE SHOULD NOT BE EDITED BY HAND
// Extracted from github/linguist commit: fe8b44ab8a225b1ffa75b983b916ea22fee5b6f7

import (
	"bytes"
	"path/filepath"
	"strings"

	"gopkg.in/toqueteos/substring.v1"
)

func IsAuxiliaryLanguage(lang string) bool {
	_, ok := auxiliaryLanguages[lang]
	return ok
}

func IsConfiguration(path string) bool {
	lang, _ := GetLanguageByExtension(path)
	_, is := configurationLanguages[lang]

	return is
}

func IsDotFile(path string) bool {
	return strings.HasPrefix(filepath.Base(path), ".")
}

func IsVendor(path string) bool {
	return findIndex(path, vendorMatchers) >= 0
}

func IsDocumentation(path string) bool {
	return findIndex(path, documentationMatchers) >= 0
}

func findIndex(path string, matchers substring.StringsMatcher) int {
	return matchers.MatchIndex(path)
}

const sniffLen = 8000

//IsBinary detects if data is a binary value based on:
//http://git.kernel.org/cgit/git/git.git/tree/xdiff-interface.c?id=HEAD#n198
func IsBinary(data []byte) bool {
	if len(data) > sniffLen {
		data = data[:sniffLen]
	}

	if bytes.IndexByte(data, byte(0)) == -1 {
		return false
	}

	return true
}

var vendorMatchers = substring.Or(
	substring.Regexp(`(^|/)cache/`),
	substring.Regexp(`^[Dd]ependencies/`),
	substring.Regexp(`(^|/)dist/`),
	substring.Regexp(`^deps/`),
	substring.Regexp(`^tools/`),
	substring.Regexp(`(^|/)configure$`),
	substring.Regexp(`(^|/)config.guess$`),
	substring.Regexp(`(^|/)config.sub$`),
	substring.Regexp(`(^|/)aclocal.m4`),
	substring.Regexp(`(^|/)libtool.m4`),
	substring.Regexp(`(^|/)ltoptions.m4`),
	substring.Regexp(`(^|/)ltsugar.m4`),
	substring.Regexp(`(^|/)ltversion.m4`),
	substring.Regexp(`(^|/)lt~obsolete.m4`),
	)

var documentationMatchers = substring.Or(
	substring.Regexp(`^docs?/`),
	substring.Regexp(`(^|/)[Dd]ocumentation/`),
	substring.Regexp(`(^|/)javadoc/`),
	substring.Regexp(`^man/`),
	substring.Regexp(`^[Ee]xamples/`),
	substring.Regexp(`(^|/)CHANGE(S|LOG)?(\.|$)`),
	substring.Regexp(`(^|/)CONTRIBUTING(\.|$)`),
	substring.Regexp(`(^|/)COPYING(\.|$)`),
	substring.Regexp(`(^|/)INSTALL(\.|$)`),
	substring.Regexp(`(^|/)LICEN[CS]E(\.|$)`),
	substring.Regexp(`(^|/)[Ll]icen[cs]e(\.|$)`),
	substring.Regexp(`(^|/)README(\.|$)`),
	substring.Regexp(`(^|/)[Rr]eadme(\.|$)`),
	substring.Regexp(`^[Ss]amples/`),
)

var configurationLanguages = map[string]bool{
	"XML": true, "JSON": true, "TOML": true, "YAML": true, "INI": true, "SQL": true,
}