/
mruby.go
156 lines (144 loc) · 4.24 KB
/
mruby.go
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package mruby
/*
#include <stdlib.h>
#include <mruby.h>
#include <mruby/proc.h>
#include <mruby/data.h>
#undef INCLUDE_ENCODING
#include <mruby/string.h>
#include <mruby/khash.h>
#include <mruby/hash.h>
#include <mruby/array.h>
#include <mruby/class.h>
#include <mruby/variable.h>
#include <mruby/compile.h>
#include <mruby/value.h>
static int _RARRAY_LEN(mrb_value a) { return (RARRAY(a)->len); }
static int _mrb_fixnum(mrb_value o) { return (int) mrb_fixnum(o); }
static float _mrb_float(mrb_value o) { return (float) mrb_float(o); }
#cgo CFLAGS: -Imruby/include
#cgo LDFLAGS: -L mruby/build/host/lib -lmruby -lm
#cgo windows LDFLAGS: ./libmruby.dll.a
*/
import "C"
import "unsafe"
import "reflect"
type MRuby struct {
mrb *C.mrb_state
}
func New() *MRuby {
return &MRuby{C.mrb_open()}
}
func go2mruby(mrb *C.mrb_state, o interface{}) C.mrb_value {
v := reflect.ValueOf(o)
switch v.Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return C.mrb_fixnum_value(C.mrb_int(v.Int()))
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return C.mrb_fixnum_value(C.mrb_int(v.Uint()))
case reflect.Float32, reflect.Float64:
return C.mrb_float_value((*C.struct_mrb_state)(mrb), (C.mrb_float)(v.Float()))
case reflect.Complex64, reflect.Complex128:
return C.mrb_float_value((*C.struct_mrb_state)(mrb), (C.mrb_float)(v.Float()))
case reflect.String:
ptr := C.CString(v.String())
return C.mrb_str_new(mrb, ptr, C.strlen(ptr))
case reflect.Bool:
if v.Bool() {
return C.mrb_true_value()
}
return C.mrb_false_value()
case reflect.Array, reflect.Slice:
ary := C.mrb_ary_new(mrb)
for i := 0; i < v.Len(); i++ {
C.mrb_ary_push(mrb, ary, go2mruby(mrb, v.Index(i).Interface()))
}
return ary
case reflect.Map:
hash := C.mrb_hash_new(mrb)
for _, key := range v.MapKeys() {
val := v.MapIndex(key)
C.mrb_hash_set(mrb, hash, go2mruby(mrb, key.String()), go2mruby(mrb, val.Interface()))
}
return hash
case reflect.Interface:
return go2mruby(mrb, v.Elem().Interface())
}
return C.mrb_nil_value()
}
func mruby2go(mrb *C.mrb_state, o C.mrb_value) interface{} {
switch o.tt {
case C.MRB_TT_TRUE:
return true
case C.MRB_TT_FALSE:
return false
case C.MRB_TT_FLOAT:
return float32(C._mrb_float(o))
case C.MRB_TT_FIXNUM:
return int32(C._mrb_fixnum(o))
case C.MRB_TT_ARRAY:
{
var list []interface{}
for i := 0; i < int(C._RARRAY_LEN(o)); i++ {
list = append(list, mruby2go(mrb, C.mrb_ary_ref(mrb, o, C.mrb_int(i))))
}
return list
}
case C.MRB_TT_HASH:
{
hash := make(map[string]interface{})
keys := C.mrb_hash_keys(mrb, o)
for i := 0; i < int(C._RARRAY_LEN(keys)); i++ {
key := C.mrb_ary_ref(mrb, keys, C.mrb_int(i))
val := C.mrb_hash_get(mrb, o, key)
hash[C.GoString(C.mrb_string_value_ptr(mrb, key))] = mruby2go(mrb, val)
}
return hash
}
case C.MRB_TT_STRING:
return C.GoString(C.mrb_string_value_ptr(mrb, o))
}
return nil
}
func (m *MRuby) Run(code string, args ...interface{}) {
c := C.CString(code)
defer C.free(unsafe.Pointer(c))
x := C.mrbc_context_new(m.mrb)
defer C.mrbc_context_free(m.mrb, x)
p := C.mrb_parse_string(m.mrb, c, x)
n := C.mrb_generate_code(m.mrb, p)
C.mrb_pool_close((*C.mrb_pool)(p.pool))
a := C.CString("ARGV")
defer C.free(unsafe.Pointer(a))
ARGV := C.mrb_ary_new(m.mrb)
for i := 0; i < len(args); i++ {
C.mrb_ary_push(m.mrb, ARGV, go2mruby(m.mrb, args[i]))
}
C.mrb_define_global_const(m.mrb, a, ARGV)
C.mrb_run(m.mrb, n, C.mrb_top_self(m.mrb))
if m.mrb.exc != nil {
C.mrb_p(m.mrb, C.mrb_obj_value(unsafe.Pointer(m.mrb.exc)))
}
}
func (m *MRuby) Eval(code string, args ...interface{}) interface{} {
c := C.CString(code)
defer C.free(unsafe.Pointer(c))
x := C.mrbc_context_new(m.mrb)
defer C.mrbc_context_free(m.mrb, x)
p := C.mrb_parse_string(m.mrb, c, x)
n := C.mrb_generate_code(m.mrb, p)
C.mrb_pool_close((*C.mrb_pool)(p.pool))
a := C.CString("ARGV")
defer C.free(unsafe.Pointer(a))
ARGV := C.mrb_ary_new(m.mrb)
for i := 0; i < len(args); i++ {
C.mrb_ary_push(m.mrb, ARGV, go2mruby(m.mrb, args[i]))
}
C.mrb_define_global_const(m.mrb, a, ARGV)
return mruby2go(m.mrb, C.mrb_run(m.mrb, n, C.mrb_top_self(m.mrb)))
}
func (m *MRuby) Close() {
if m.mrb != nil {
C.mrb_close(m.mrb)
}
}