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environment.go
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environment.go
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package core
import (
"io"
"os"
"path/filepath"
"strconv"
"strings"
)
var (
Stdin io.Reader = os.Stdin
Stdout io.Writer = os.Stdout
Stderr io.Writer = os.Stderr
VerbosityLevel = 0
)
type (
Env struct {
Namespaces map[*string]*Namespace
CoreNamespace *Namespace
stdout *Var
stdin *Var
stderr *Var
printReadably *Var
file *Var
MainFile *Var
args *Var
classPath *Var
ns *Var
NS_VAR *Var
IN_NS_VAR *Var
version *Var
libs *Var
Features Set
}
)
func versionMap() Map {
res := EmptyArrayMap()
parts := strings.Split(VERSION[1:], ".")
i, _ := strconv.ParseInt(parts[0], 10, 64)
res.Add(MakeKeyword("major"), Int{I: int(i)})
i, _ = strconv.ParseInt(parts[1], 10, 64)
res.Add(MakeKeyword("minor"), Int{I: int(i)})
i, _ = strconv.ParseInt(parts[2], 10, 64)
res.Add(MakeKeyword("incremental"), Int{I: int(i)})
return res
}
func (env *Env) SetEnvArgs(newArgs []string) {
args := EmptyVector()
for _, arg := range newArgs {
args = args.Conjoin(MakeString(arg))
}
if args.Count() > 0 {
env.args.Value = args.Seq()
} else {
env.args.Value = NIL
}
}
/* This runs after invariant initialization, which includes calling
NewEnv(). NOTE: Any changes to the list of run-time
initializations must be reflected in gen_code/gen_code.go. */
func (env *Env) SetClassPath(cp string) {
cpArray := filepath.SplitList(cp)
cpVec := EmptyVector()
for _, cpelem := range cpArray {
cpVec = cpVec.Conjoin(MakeString(cpelem))
}
if cpVec.Count() == 0 {
cpVec = cpVec.Conjoin(MakeString(""))
}
env.classPath.Value = cpVec
}
/* This runs after invariant initialization, which includes calling
NewEnv(). NOTE: Any changes to the list of run-time
initializations must be reflected in gen_code/gen_code.go. */
func (env *Env) InitEnv(stdin io.Reader, stdout, stderr io.Writer, args []string) {
env.stdin.Value = MakeBufferedReader(stdin)
env.stdout.Value = MakeIOWriter(stdout)
env.stderr.Value = MakeIOWriter(stderr)
env.SetEnvArgs(args)
}
func (env *Env) SetStdIO(stdin, stdout, stderr Object) {
env.stdin.Value = stdin
env.stdout.Value = stdout
env.stderr.Value = stderr
}
func (env *Env) StdIO() (stdin, stdout, stderr Object) {
return env.stdin.Value, env.stdout.Value, env.stderr.Value
}
/* This runs after invariant initialization, which includes calling
NewEnv(). NOTE: Any changes to the list of run-time
initializations must be reflected in gen_code/gen_code.go. */
func (env *Env) SetMainFilename(filename string) {
env.MainFile.Value = MakeString(filename)
}
/* This runs after invariant initialization, which includes calling
NewEnv(). NOTE: Any changes to the list of run-time
initializations must be reflected in gen_code/gen_code.go. */
func (env *Env) SetFilename(obj Object) {
env.file.Value = obj
}
func (env *Env) IsStdIn(obj Object) bool {
return env.stdin.Value == obj
}
func (env *Env) CurrentNamespace() *Namespace {
return EnsureObjectIsNamespace(env.ns.Value, "")
}
func (env *Env) SetCurrentNamespace(ns *Namespace) {
env.ns.Value = ns
}
func (env *Env) EnsureSymbolIsNamespace(sym Symbol) *Namespace {
if sym.ns != nil {
panic(RT.NewError("Namespace's name cannot be qualified: " + sym.ToString(false)))
}
if env.Namespaces[sym.name] == nil {
env.Namespaces[sym.name] = NewNamespace(sym)
}
return env.Namespaces[sym.name]
}
func (env *Env) EnsureSymbolIsLib(sym Symbol) *Namespace {
ns := env.EnsureSymbolIsNamespace(sym)
env.libs.Value.(*MapSet).Add(sym)
return ns
}
func (env *Env) NamespaceFor(ns *Namespace, s Symbol) *Namespace {
var res *Namespace
if s.ns == nil {
res = ns
} else {
res = ns.aliases[s.ns]
if res == nil {
res = env.Namespaces[s.ns]
}
}
if res != nil {
res.MaybeLazy("NamespaceFor")
}
return res
}
func (env *Env) ResolveIn(n *Namespace, s Symbol) (*Var, bool) {
ns := env.NamespaceFor(n, s)
if ns == nil {
return nil, false
}
if v, ok := ns.mappings[s.name]; ok {
return v, true
}
if s.Equals(env.IN_NS_VAR.name) {
return env.IN_NS_VAR, true
}
if s.Equals(env.NS_VAR.name) {
return env.NS_VAR, true
}
return nil, false
}
func (env *Env) Resolve(s Symbol) (*Var, bool) {
return env.ResolveIn(env.CurrentNamespace(), s)
}
func (env *Env) FindNamespace(s Symbol) *Namespace {
if s.ns != nil {
return nil
}
ns := env.Namespaces[s.name]
if ns != nil {
ns.MaybeLazy("FindNameSpace")
}
return ns
}
func (env *Env) RemoveNamespace(s Symbol) *Namespace {
if s.ns != nil {
return nil
}
if s.Equals(SYMBOLS.joker_core) {
panic(RT.NewError("Cannot remove core namespace"))
}
ns := env.Namespaces[s.name]
delete(env.Namespaces, s.name)
return ns
}
func (env *Env) ResolveSymbol(s Symbol) Symbol {
if strings.ContainsRune(*s.name, '.') {
return s
}
if s.ns == nil && TYPES[s.name] != nil {
return s
}
currentNs := env.CurrentNamespace()
if s.ns != nil {
ns := env.NamespaceFor(currentNs, s)
if ns == nil || ns.Name.name == s.ns {
if ns != nil {
ns.isUsed = true
ns.isGloballyUsed = true
}
return s
}
ns.isUsed = true
ns.isGloballyUsed = true
return Symbol{
name: s.name,
ns: ns.Name.name,
}
}
vr, ok := currentNs.mappings[s.name]
if !ok {
return Symbol{
name: s.name,
ns: currentNs.Name.name,
}
}
vr.isUsed = true
vr.isGloballyUsed = true
vr.ns.isUsed = true
vr.ns.isGloballyUsed = true
return Symbol{
name: vr.name.name,
ns: vr.ns.Name.name,
}
}
func init() {
GLOBAL_ENV.SetCurrentNamespace(GLOBAL_ENV.EnsureSymbolIsNamespace(MakeSymbol("user")))
}