+++ /dev/null
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package interp
-
-// Emulated functions that we cannot interpret because they are
-// external or because they use "unsafe" or "reflect" operations.
-
-import (
- "bytes"
- "math"
- "os"
- "runtime"
- "strings"
- "time"
- "unicode/utf8"
-)
-
-type externalFn func(fr *frame, args []value) value
-
-// TODO(adonovan): fix: reflect.Value abstracts an lvalue or an
-// rvalue; Set() causes mutations that can be observed via aliases.
-// We have not captured that correctly here.
-
-// Key strings are from Function.String().
-var externals = make(map[string]externalFn)
-
-func init() {
- // That little dot ۰ is an Arabic zero numeral (U+06F0), categories [Nd].
- for k, v := range map[string]externalFn{
- "(reflect.Value).Bool": ext۰reflect۰Value۰Bool,
- "(reflect.Value).CanAddr": ext۰reflect۰Value۰CanAddr,
- "(reflect.Value).CanInterface": ext۰reflect۰Value۰CanInterface,
- "(reflect.Value).Elem": ext۰reflect۰Value۰Elem,
- "(reflect.Value).Field": ext۰reflect۰Value۰Field,
- "(reflect.Value).Float": ext۰reflect۰Value۰Float,
- "(reflect.Value).Index": ext۰reflect۰Value۰Index,
- "(reflect.Value).Int": ext۰reflect۰Value۰Int,
- "(reflect.Value).Interface": ext۰reflect۰Value۰Interface,
- "(reflect.Value).IsNil": ext۰reflect۰Value۰IsNil,
- "(reflect.Value).IsValid": ext۰reflect۰Value۰IsValid,
- "(reflect.Value).Kind": ext۰reflect۰Value۰Kind,
- "(reflect.Value).Len": ext۰reflect۰Value۰Len,
- "(reflect.Value).MapIndex": ext۰reflect۰Value۰MapIndex,
- "(reflect.Value).MapKeys": ext۰reflect۰Value۰MapKeys,
- "(reflect.Value).NumField": ext۰reflect۰Value۰NumField,
- "(reflect.Value).NumMethod": ext۰reflect۰Value۰NumMethod,
- "(reflect.Value).Pointer": ext۰reflect۰Value۰Pointer,
- "(reflect.Value).Set": ext۰reflect۰Value۰Set,
- "(reflect.Value).String": ext۰reflect۰Value۰String,
- "(reflect.Value).Type": ext۰reflect۰Value۰Type,
- "(reflect.Value).Uint": ext۰reflect۰Value۰Uint,
- "(reflect.error).Error": ext۰reflect۰error۰Error,
- "(reflect.rtype).Bits": ext۰reflect۰rtype۰Bits,
- "(reflect.rtype).Elem": ext۰reflect۰rtype۰Elem,
- "(reflect.rtype).Field": ext۰reflect۰rtype۰Field,
- "(reflect.rtype).In": ext۰reflect۰rtype۰In,
- "(reflect.rtype).Kind": ext۰reflect۰rtype۰Kind,
- "(reflect.rtype).NumField": ext۰reflect۰rtype۰NumField,
- "(reflect.rtype).NumIn": ext۰reflect۰rtype۰NumIn,
- "(reflect.rtype).NumMethod": ext۰reflect۰rtype۰NumMethod,
- "(reflect.rtype).NumOut": ext۰reflect۰rtype۰NumOut,
- "(reflect.rtype).Out": ext۰reflect۰rtype۰Out,
- "(reflect.rtype).Size": ext۰reflect۰rtype۰Size,
- "(reflect.rtype).String": ext۰reflect۰rtype۰String,
- "bytes.Equal": ext۰bytes۰Equal,
- "bytes.IndexByte": ext۰bytes۰IndexByte,
- "fmt.Sprint": ext۰fmt۰Sprint,
- "math.Abs": ext۰math۰Abs,
- "math.Exp": ext۰math۰Exp,
- "math.Float32bits": ext۰math۰Float32bits,
- "math.Float32frombits": ext۰math۰Float32frombits,
- "math.Float64bits": ext۰math۰Float64bits,
- "math.Float64frombits": ext۰math۰Float64frombits,
- "math.Inf": ext۰math۰Inf,
- "math.IsNaN": ext۰math۰IsNaN,
- "math.Ldexp": ext۰math۰Ldexp,
- "math.Log": ext۰math۰Log,
- "math.Min": ext۰math۰Min,
- "math.NaN": ext۰math۰NaN,
- "os.Exit": ext۰os۰Exit,
- "os.Getenv": ext۰os۰Getenv,
- "reflect.New": ext۰reflect۰New,
- "reflect.SliceOf": ext۰reflect۰SliceOf,
- "reflect.TypeOf": ext۰reflect۰TypeOf,
- "reflect.ValueOf": ext۰reflect۰ValueOf,
- "reflect.Zero": ext۰reflect۰Zero,
- "runtime.Breakpoint": ext۰runtime۰Breakpoint,
- "runtime.GC": ext۰runtime۰GC,
- "runtime.GOMAXPROCS": ext۰runtime۰GOMAXPROCS,
- "runtime.GOROOT": ext۰runtime۰GOROOT,
- "runtime.Goexit": ext۰runtime۰Goexit,
- "runtime.Gosched": ext۰runtime۰Gosched,
- "runtime.NumCPU": ext۰runtime۰NumCPU,
- "strings.Count": ext۰strings۰Count,
- "strings.Index": ext۰strings۰Index,
- "strings.IndexByte": ext۰strings۰IndexByte,
- "strings.Replace": ext۰strings۰Replace,
- "time.Sleep": ext۰time۰Sleep,
- "unicode/utf8.DecodeRuneInString": ext۰unicode۰utf8۰DecodeRuneInString,
- } {
- externals[k] = v
- }
-}
-
-func ext۰bytes۰Equal(fr *frame, args []value) value {
- // func Equal(a, b []byte) bool
- a := args[0].([]value)
- b := args[1].([]value)
- if len(a) != len(b) {
- return false
- }
- for i := range a {
- if a[i] != b[i] {
- return false
- }
- }
- return true
-}
-
-func ext۰bytes۰IndexByte(fr *frame, args []value) value {
- // func IndexByte(s []byte, c byte) int
- s := args[0].([]value)
- c := args[1].(byte)
- for i, b := range s {
- if b.(byte) == c {
- return i
- }
- }
- return -1
-}
-
-func ext۰math۰Float64frombits(fr *frame, args []value) value {
- return math.Float64frombits(args[0].(uint64))
-}
-
-func ext۰math۰Float64bits(fr *frame, args []value) value {
- return math.Float64bits(args[0].(float64))
-}
-
-func ext۰math۰Float32frombits(fr *frame, args []value) value {
- return math.Float32frombits(args[0].(uint32))
-}
-
-func ext۰math۰Abs(fr *frame, args []value) value {
- return math.Abs(args[0].(float64))
-}
-
-func ext۰math۰Exp(fr *frame, args []value) value {
- return math.Exp(args[0].(float64))
-}
-
-func ext۰math۰Float32bits(fr *frame, args []value) value {
- return math.Float32bits(args[0].(float32))
-}
-
-func ext۰math۰Min(fr *frame, args []value) value {
- return math.Min(args[0].(float64), args[1].(float64))
-}
-
-func ext۰math۰NaN(fr *frame, args []value) value {
- return math.NaN()
-}
-
-func ext۰math۰IsNaN(fr *frame, args []value) value {
- return math.IsNaN(args[0].(float64))
-}
-
-func ext۰math۰Inf(fr *frame, args []value) value {
- return math.Inf(args[0].(int))
-}
-
-func ext۰math۰Ldexp(fr *frame, args []value) value {
- return math.Ldexp(args[0].(float64), args[1].(int))
-}
-
-func ext۰math۰Log(fr *frame, args []value) value {
- return math.Log(args[0].(float64))
-}
-
-func ext۰runtime۰Breakpoint(fr *frame, args []value) value {
- runtime.Breakpoint()
- return nil
-}
-
-func ext۰strings۰Count(fr *frame, args []value) value {
- return strings.Count(args[0].(string), args[1].(string))
-}
-
-func ext۰strings۰IndexByte(fr *frame, args []value) value {
- return strings.IndexByte(args[0].(string), args[1].(byte))
-}
-
-func ext۰strings۰Index(fr *frame, args []value) value {
- return strings.Index(args[0].(string), args[1].(string))
-}
-
-func ext۰strings۰Replace(fr *frame, args []value) value {
- // func Replace(s, old, new string, n int) string
- s := args[0].(string)
- new := args[1].(string)
- old := args[2].(string)
- n := args[3].(int)
- return strings.Replace(s, old, new, n)
-}
-
-func ext۰runtime۰GOMAXPROCS(fr *frame, args []value) value {
- // Ignore args[0]; don't let the interpreted program
- // set the interpreter's GOMAXPROCS!
- return runtime.GOMAXPROCS(0)
-}
-
-func ext۰runtime۰Goexit(fr *frame, args []value) value {
- // TODO(adonovan): don't kill the interpreter's main goroutine.
- runtime.Goexit()
- return nil
-}
-
-func ext۰runtime۰GOROOT(fr *frame, args []value) value {
- return runtime.GOROOT()
-}
-
-func ext۰runtime۰GC(fr *frame, args []value) value {
- runtime.GC()
- return nil
-}
-
-func ext۰runtime۰Gosched(fr *frame, args []value) value {
- runtime.Gosched()
- return nil
-}
-
-func ext۰runtime۰NumCPU(fr *frame, args []value) value {
- return runtime.NumCPU()
-}
-
-func ext۰time۰Sleep(fr *frame, args []value) value {
- time.Sleep(time.Duration(args[0].(int64)))
- return nil
-}
-
-func valueToBytes(v value) []byte {
- in := v.([]value)
- b := make([]byte, len(in))
- for i := range in {
- b[i] = in[i].(byte)
- }
- return b
-}
-
-func ext۰os۰Getenv(fr *frame, args []value) value {
- name := args[0].(string)
- switch name {
- case "GOSSAINTERP":
- return "1"
- case "GOARCH":
- return "amd64"
- case "GOOS":
- return "linux"
- }
- return os.Getenv(name)
-}
-
-func ext۰os۰Exit(fr *frame, args []value) value {
- panic(exitPanic(args[0].(int)))
-}
-
-func ext۰unicode۰utf8۰DecodeRuneInString(fr *frame, args []value) value {
- r, n := utf8.DecodeRuneInString(args[0].(string))
- return tuple{r, n}
-}
-
-// A fake function for turning an arbitrary value into a string.
-// Handles only the cases needed by the tests.
-// Uses same logic as 'print' built-in.
-func ext۰fmt۰Sprint(fr *frame, args []value) value {
- buf := new(bytes.Buffer)
- wasStr := false
- for i, arg := range args[0].([]value) {
- x := arg.(iface).v
- _, isStr := x.(string)
- if i > 0 && !wasStr && !isStr {
- buf.WriteByte(' ')
- }
- wasStr = isStr
- buf.WriteString(toString(x))
- }
- return buf.String()
-}
projects / dotfiles / .git / blobdiff