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|
// runoutput
//go:build !wasm
// Copyright 2022 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 main
import (
"bytes"
"fmt"
"math"
"math/bits"
"os"
"strconv"
"strings"
)
var types = []string{
"int",
"int8",
"int16",
"int32",
"int64",
"uint",
"uint8",
"uint16",
"uint32",
"uint64",
"uintptr",
"float32",
"float64",
}
func main() {
var prog bytes.Buffer
fmt.Fprintf(&prog, "package main\n\n")
fmt.Fprintf(&prog, "import ( \"fmt\"; \"math\" )\n")
for _, t1 := range types {
for _, t2 := range types {
fmt.Fprintf(&prog, "func %[1]s_to_%[2]s(x %[1]s) %[2]s { return %[2]s(x) }\n", t1, t2)
}
}
var outputs []string
var exprs []string
fmt.Fprintf(&prog, "var (\n")
for _, t1 := range types {
var inputs []string
switch t1 {
case "int64", "int":
if t1 == "int64" || bits.UintSize == 64 {
inputs = append(inputs, "-0x8000_0000_0000_0000", "-0x7fff_ffff_ffff_ffff", "-0x12_3456_7890", "0x12_3456_7890", "0x7fff_ffff_ffff_ffff")
}
fallthrough
case "int32":
inputs = append(inputs, "-0x8000_0000", "-0x7fff_ffff", "-0x12_3456", "0x12_3456", "0x7fff_ffff")
fallthrough
case "int16":
inputs = append(inputs, "-0x8000", "-0x7fff", "-0x1234", "0x1234", "0x7fff")
fallthrough
case "int8":
inputs = append(inputs, "-0x80", "-0x7f", "-0x12", "-1", "0", "1", "0x12", "0x7f")
case "uint64", "uint", "uintptr":
if t1 == "uint64" || bits.UintSize == 64 {
inputs = append(inputs, "0x12_3456_7890", "0x7fff_ffff_ffff_ffff", "0x8000_0000_0000_0000", "0xffff_ffff_ffff_ffff")
}
fallthrough
case "uint32":
inputs = append(inputs, "0x12_3456", "0x7fff_ffff", "0x8000_0000", "0xffff_ffff")
fallthrough
case "uint16":
inputs = append(inputs, "0x1234", "0x7fff", "0x8000", "0xffff")
fallthrough
case "uint8":
inputs = append(inputs, "0", "1", "0x12", "0x7f", "0x80", "0xff")
case "float64":
inputs = append(inputs,
"-1.79769313486231570814527423731704356798070e+308",
"-1e300",
"-1e100",
"-1e40",
"-3.5e38",
"3.5e38",
"1e40",
"1e100",
"1e300",
"1.79769313486231570814527423731704356798070e+308")
fallthrough
case "float32":
inputs = append(inputs,
"-3.40282346638528859811704183484516925440e+38",
"-1e38",
"-1.5",
"-1.401298464324817070923729583289916131280e-45",
"0",
"1.401298464324817070923729583289916131280e-45",
"1.5",
"1e38",
"3.40282346638528859811704183484516925440e+38")
}
for _, t2 := range types {
for _, x := range inputs {
code := fmt.Sprintf("%s_to_%s(%s)", t1, t2, x)
fmt.Fprintf(&prog, "\tv%d = %s\n", len(outputs), code)
exprs = append(exprs, code)
outputs = append(outputs, convert(x, t1, t2))
}
}
}
fmt.Fprintf(&prog, ")\n\n")
fmt.Fprintf(&prog, "func main() {\n\tok := true\n")
for i, out := range outputs {
fmt.Fprintf(&prog, "\tif v%d != %s { fmt.Println(%q, \"=\", v%d, \"want\", %s); ok = false }\n", i, out, exprs[i], i, out)
}
fmt.Fprintf(&prog, "\tif !ok { println(\"FAIL\") }\n")
fmt.Fprintf(&prog, "}\n")
os.Stdout.Write(prog.Bytes())
}
func convert(x, t1, t2 string) string {
if strings.HasPrefix(t1, "int") {
v, err := strconv.ParseInt(x, 0, 64)
if err != nil {
println(x, t1, t2)
panic(err)
}
return convert1(v, t2)
}
if strings.HasPrefix(t1, "uint") {
v, err := strconv.ParseUint(x, 0, 64)
if err != nil {
println(x, t1, t2)
panic(err)
}
return convert1(v, t2)
}
if strings.HasPrefix(t1, "float") {
v, err := strconv.ParseFloat(x, 64)
if err != nil {
println(x, t1, t2)
panic(err)
}
if t1 == "float32" {
v = float64(float32(v))
}
return convert1(v, t2)
}
panic(t1)
}
func convert1[T int64 | uint64 | float64](v T, t2 string) string {
switch t2 {
case "int":
return fmt.Sprintf("%s(%#x)", t2, int(v))
case "int8":
return fmt.Sprintf("%s(%#x)", t2, int8(v))
case "int16":
return fmt.Sprintf("%s(%#x)", t2, int16(v))
case "int32":
return fmt.Sprintf("%s(%#x)", t2, int32(v))
case "int64":
return fmt.Sprintf("%s(%#x)", t2, int64(v))
case "uint":
return fmt.Sprintf("%s(%#x)", t2, uint(v))
case "uint8":
return fmt.Sprintf("%s(%#x)", t2, uint8(v))
case "uint16":
return fmt.Sprintf("%s(%#x)", t2, uint16(v))
case "uint32":
return fmt.Sprintf("%s(%#x)", t2, uint32(v))
case "uint64":
return fmt.Sprintf("%s(%#x)", t2, uint64(v))
case "uintptr":
return fmt.Sprintf("%s(%#x)", t2, uintptr(v))
case "float32":
v := float32(v)
if math.IsInf(float64(v), -1) {
return "float32(math.Inf(-1))"
}
if math.IsInf(float64(v), +1) {
return "float32(math.Inf(+1))"
}
return fmt.Sprintf("%s(%v)", t2, float64(v))
case "float64":
return fmt.Sprintf("%s(%v)", t2, float64(v))
}
panic(t2)
}
|
