1 /* go-make-slice.c -- make a slice.
3 Copyright 2011 The Go Authors. All rights reserved.
4 Use of this source code is governed by a BSD-style
5 license that can be found in the LICENSE file. */
10 #include "go-assert.h"
18 struct __go_open_array
19 __go_make_slice2 (const struct __go_type_descriptor
*td
, uintptr_t len
,
22 const struct __go_slice_type
* std
;
26 struct __go_open_array ret
;
29 __go_assert (td
->__code
== GO_SLICE
);
30 std
= (const struct __go_slice_type
*) td
;
33 if (ilen
< 0 || (uintptr_t) ilen
!= len
)
34 runtime_panicstring ("makeslice: len out of range");
38 || (uintptr_t) icap
!= cap
39 || (std
->__element_type
->__size
> 0
40 && cap
> (uintptr_t) -1U / std
->__element_type
->__size
))
41 runtime_panicstring ("makeslice: cap out of range");
44 ret
.__capacity
= icap
;
46 size
= cap
* std
->__element_type
->__size
;
47 flag
= ((std
->__element_type
->__code
& GO_NO_POINTERS
) != 0
50 ret
.__values
= runtime_mallocgc (size
, flag
, 1, 1);
55 struct __go_open_array
56 __go_make_slice1 (const struct __go_type_descriptor
*td
, uintptr_t len
)
58 return __go_make_slice2 (td
, len
, len
);
61 struct __go_open_array
62 __go_make_slice2_big (const struct __go_type_descriptor
*td
, uint64_t len
,
68 slen
= (uintptr_t) len
;
69 if ((uint64_t) slen
!= len
)
70 runtime_panicstring ("makeslice: len out of range");
72 scap
= (uintptr_t) cap
;
73 if ((uint64_t) scap
!= cap
)
74 runtime_panicstring ("makeslice: cap out of range");
76 return __go_make_slice2 (td
, slen
, scap
);
79 struct __go_open_array
80 __go_make_slice1_big (const struct __go_type_descriptor
*td
, uint64_t len
)
82 return __go_make_slice2_big (td
, len
, len
);