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// +build darwin nintendoswitch wasi
package syscall
import (
"unsafe"
)
type sliceHeader struct {
buf *byte
len uintptr
cap uintptr
}
func Close(fd int) (err error) {
if libc_close(int32(fd)) < 0 {
err = getErrno()
}
return
}
func Write(fd int, p []byte) (n int, err error) {
buf, count := splitSlice(p)
n = libc_write(int32(fd), buf, uint(count))
if n < 0 {
err = getErrno()
}
return
}
func Read(fd int, p []byte) (n int, err error) {
buf, count := splitSlice(p)
n = libc_read(int32(fd), buf, uint(count))
if n < 0 {
err = getErrno()
}
return
}
func Seek(fd int, offset int64, whence int) (off int64, err error) {
return 0, ENOSYS // TODO
}
func Open(path string, flag int, mode uint32) (fd int, err error) {
data := append([]byte(path), 0)
fd = int(libc_open(&data[0], int32(flag), mode))
if fd < 0 {
err = getErrno()
}
return
}
func Mkdir(path string, mode uint32) (err error) {
return ENOSYS // TODO
}
func Unlink(path string) (err error) {
return ENOSYS // TODO
}
func Kill(pid int, sig Signal) (err error) {
return ENOSYS // TODO
}
func Getenv(key string) (value string, found bool) {
data := append([]byte(key), 0)
raw := libc_getenv(&data[0])
if raw == nil {
return "", false
}
ptr := uintptr(unsafe.Pointer(raw))
for size := uintptr(0); ; size++ {
v := *(*byte)(unsafe.Pointer(ptr))
if v == 0 {
src := *(*[]byte)(unsafe.Pointer(&sliceHeader{buf: raw, len: size, cap: size}))
return string(src), true
}
ptr += unsafe.Sizeof(byte(0))
}
}
func splitSlice(p []byte) (buf *byte, len uintptr) {
slice := (*sliceHeader)(unsafe.Pointer(&p))
return slice.buf, slice.len
}
// ssize_t write(int fd, const void *buf, size_t count)
//export write
func libc_write(fd int32, buf *byte, count uint) int
// char *getenv(const char *name);
//export getenv
func libc_getenv(name *byte) *byte
// ssize_t read(int fd, void *buf, size_t count);
//export read
func libc_read(fd int32, buf *byte, count uint) int
// int open(const char *pathname, int flags, mode_t mode);
//export open
func libc_open(pathname *byte, flags int32, mode uint32) int32
// int close(int fd)
//export close
func libc_close(fd int32) int32
|
