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// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
export type slice = struct {
data: nullable *opaque,
length: size,
capacity: size,
};
export fn ensure(s: *slice, membsz: size) bool = {
let cap = s.capacity;
if (cap >= s.length) {
return true;
};
for (cap < s.length) {
assert(cap >= s.capacity, "slice out of memory (overflow)");
if (cap == 0) {
cap = s.length;
} else {
cap *= 2;
};
};
s.capacity = cap;
let data = realloc(s.data, s.capacity * membsz);
if (data == null) {
if (s.capacity * membsz == 0) {
s.data = null;
return true;
} else {
return false;
};
};
s.data = data;
return true;
};
export fn unensure(s: *slice, membsz: size) void = {
let cap = s.capacity;
for (cap > s.length) {
cap /= 2;
};
cap *= 2;
s.capacity = cap;
let data = realloc(s.data, s.capacity * membsz);
if (data != null || s.capacity * membsz == 0) {
s.data = data;
};
};
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