2011-06-14 15:51:16 +02:00
|
|
|
/* go-make-slice.c -- make a slice.
|
|
|
|
|
|
|
|
Copyright 2011 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. */
|
|
|
|
|
|
|
|
#include <stdint.h>
|
|
|
|
|
|
|
|
#include "go-alloc.h"
|
|
|
|
#include "go-assert.h"
|
|
|
|
#include "go-panic.h"
|
|
|
|
#include "go-type.h"
|
|
|
|
#include "array.h"
|
|
|
|
#include "runtime.h"
|
2011-10-27 01:57:58 +02:00
|
|
|
#include "arch.h"
|
2011-06-14 15:51:16 +02:00
|
|
|
#include "malloc.h"
|
|
|
|
|
|
|
|
struct __go_open_array
|
|
|
|
__go_make_slice2 (const struct __go_type_descriptor *td, uintptr_t len,
|
|
|
|
uintptr_t cap)
|
|
|
|
{
|
|
|
|
const struct __go_slice_type* std;
|
|
|
|
int ilen;
|
|
|
|
int icap;
|
|
|
|
uintptr_t size;
|
|
|
|
struct __go_open_array ret;
|
|
|
|
unsigned int flag;
|
|
|
|
|
|
|
|
__go_assert (td->__code == GO_SLICE);
|
|
|
|
std = (const struct __go_slice_type *) td;
|
|
|
|
|
|
|
|
ilen = (int) len;
|
|
|
|
if (ilen < 0 || (uintptr_t) ilen != len)
|
|
|
|
__go_panic_msg ("makeslice: len out of range");
|
|
|
|
|
|
|
|
icap = (int) cap;
|
|
|
|
if (cap < len
|
|
|
|
|| (uintptr_t) icap != cap
|
2011-09-21 00:06:20 +02:00
|
|
|
|| (std->__element_type->__size > 0
|
|
|
|
&& cap > (uintptr_t) -1U / std->__element_type->__size))
|
2011-06-14 15:51:16 +02:00
|
|
|
__go_panic_msg ("makeslice: cap out of range");
|
|
|
|
|
|
|
|
ret.__count = ilen;
|
|
|
|
ret.__capacity = icap;
|
|
|
|
|
|
|
|
size = cap * std->__element_type->__size;
|
|
|
|
flag = ((std->__element_type->__code & GO_NO_POINTERS) != 0
|
|
|
|
? FlagNoPointers
|
|
|
|
: 0);
|
|
|
|
ret.__values = runtime_mallocgc (size, flag, 1, 1);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct __go_open_array
|
|
|
|
__go_make_slice1 (const struct __go_type_descriptor *td, uintptr_t len)
|
|
|
|
{
|
|
|
|
return __go_make_slice2 (td, len, len);
|
|
|
|
}
|