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refactor list walking

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This commit is contained in:
Folkert 2021-03-29 16:32:43 +02:00
parent 4ce520fed6
commit 1302ee296f
8 changed files with 144 additions and 147 deletions
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36
compiler/builtins/bitcode/src/list.zig
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@ -502,6 +502,42 @@ pub fn listWalkBackwards(list: RocList, stepper: Opaque, stepper_caller: Caller2
utils.decref(std.heap.c_allocator, alignment, list.bytes, data_bytes);
}
pub fn listWalkUntil(list: RocList, stepper: Opaque, stepper_caller: Caller2, accum: Opaque, alignment: usize, element_width: usize, accum_width: usize, output: Opaque) callconv(.C) void {
if (accum_width == 0) {
return;
}
if (list.isEmpty()) {
@memcpy(output orelse unreachable, accum orelse unreachable, accum_width);
return;
}
const alloc: [*]u8 = @ptrCast([*]u8, std.heap.c_allocator.alloc(u8, accum_width) catch unreachable);
var b1 = output orelse unreachable;
var b2 = alloc;
@memcpy(b2, accum orelse unreachable, accum_width);
if (list.bytes) |source_ptr| {
var i: usize = 0;
const size = list.len();
while (i < size) : (i += 1) {
const element = source_ptr + i * element_width;
stepper_caller(stepper, element, b2, b1);
const temp = b1;
b2 = b1;
b1 = temp;
}
}
@memcpy(output orelse unreachable, b2, accum_width);
std.heap.c_allocator.free(alloc[0..accum_width]);
const data_bytes = list.len() * element_width;
utils.decref(std.heap.c_allocator, alignment, list.bytes, data_bytes);
}
// List.contains : List k, k -> Bool
pub fn listContains(list: RocList, key: Opaque, key_width: usize, is_eq: EqFn) callconv(.C) bool {
if (list.bytes) |source_ptr| {