tinygo.go

//go:build tinygo

package ox

// copied from the go source tree

import (
	"errors"
	"os"
	"reflect"
	"runtime"
)

func overflowComplex(v reflect.Value, c complex128) bool {
	// tinygo doesn't have reflect.Value.OverflowComplex
	return true
}

// userCacheDir returns the default root directory to use for user-specific
// cached data. Users should create their own application-specific subdirectory
// within this one and use that.
//
// On Unix systems, it returns $XDG_CACHE_HOME as specified by
// https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html if
// non-empty, else $HOME/.cache.
// On Darwin, it returns $HOME/Library/Caches.
// On Windows, it returns %LocalAppData%.
// On Plan 9, it returns $home/lib/cache.
//
// If the location cannot be determined (for example, $HOME is not defined),
// then it will return an error.
func userCacheDir() (string, error) {
	var dir string

	switch runtime.GOOS {
	case "windows":
		dir = os.Getenv("LocalAppData")
		if dir == "" {
			return "", errors.New("%LocalAppData% is not defined")
		}

	case "darwin", "ios":
		dir = os.Getenv("HOME")
		if dir == "" {
			return "", errors.New("$HOME is not defined")
		}
		dir += "/Library/Caches"

	case "plan9":
		dir = os.Getenv("home")
		if dir == "" {
			return "", errors.New("$home is not defined")
		}
		dir += "/lib/cache"

	default: // Unix
		dir = os.Getenv("XDG_CACHE_HOME")
		if dir == "" {
			dir = os.Getenv("HOME")
			if dir == "" {
				return "", errors.New("neither $XDG_CACHE_HOME nor $HOME are defined")
			}
			dir += "/.cache"
		}
	}

	return dir, nil
}

// userConfigDir returns the default root directory to use for user-specific
// configuration data. Users should create their own application-specific
// subdirectory within this one and use that.
//
// On Unix systems, it returns $XDG_CONFIG_HOME as specified by
// https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html if
// non-empty, else $HOME/.config.
// On Darwin, it returns $HOME/Library/Application Support.
// On Windows, it returns %AppData%.
// On Plan 9, it returns $home/lib.
//
// If the location cannot be determined (for example, $HOME is not defined),
// then it will return an error.
func userConfigDir() (string, error) {
	var dir string

	switch runtime.GOOS {
	case "windows":
		dir = os.Getenv("AppData")
		if dir == "" {
			return "", errors.New("%AppData% is not defined")
		}

	case "darwin", "ios":
		dir = os.Getenv("HOME")
		if dir == "" {
			return "", errors.New("$HOME is not defined")
		}
		dir += "/Library/Application Support"

	case "plan9":
		dir = os.Getenv("home")
		if dir == "" {
			return "", errors.New("$home is not defined")
		}
		dir += "/lib"

	default: // Unix
		dir = os.Getenv("XDG_CONFIG_HOME")
		if dir == "" {
			dir = os.Getenv("HOME")
			if dir == "" {
				return "", errors.New("neither $XDG_CONFIG_HOME nor $HOME are defined")
			}
			dir += "/.config"
		}
	}

	return dir, nil
}

// userHomeDir returns the current user's home directory.
//
// On Unix, including macOS, it returns the $HOME environment variable.
// On Windows, it returns %USERPROFILE%.
// On Plan 9, it returns the $home environment variable.
//
// If the expected variable is not set in the environment, UserHomeDir
// returns either a platform-specific default value or a non-nil error.
func userHomeDir() (string, error) {
	env, enverr := "HOME", "$HOME"
	switch runtime.GOOS {
	case "windows":
		env, enverr = "USERPROFILE", "%userprofile%"
	case "plan9":
		env, enverr = "home", "$home"
	}
	if v := os.Getenv(env); v != "" {
		return v, nil
	}
	// On some geese the home directory is not always defined.
	switch runtime.GOOS {
	case "android":
		return "/sdcard", nil
	case "ios":
		return "/", nil
	}
	return "", errors.New(enverr + " is not defined")
}