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change semantics of @memcpy and @memset

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Now they use slices or array pointers with any element type instead of
requiring byte pointers.

This is a breaking enhancement to the language.

The safety check for overlapping pointers will be implemented in a
future commit.

closes #14040
This commit is contained in:
Andrew Kelley
2023-04-13 21:44:40 -07:00
parent 8d88dcdc61
commit a5c910adb6
33 changed files with 220 additions and 279 deletions
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4
lib/std/array_hash_map.zig
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@@ -1893,7 +1893,7 @@ const IndexHeader = struct {
const index_size = hash_map.capacityIndexSize(new_bit_index);
const nbytes = @sizeOf(IndexHeader) + index_size * len;
const bytes = try allocator.alignedAlloc(u8, @alignOf(IndexHeader), nbytes);
@memset(bytes.ptr + @sizeOf(IndexHeader), 0xff, bytes.len - @sizeOf(IndexHeader));
@memset(bytes[@sizeOf(IndexHeader)..], 0xff);
const result = @ptrCast(*IndexHeader, bytes.ptr);
result.* = .{
.bit_index = new_bit_index,
@@ -1914,7 +1914,7 @@ const IndexHeader = struct {
const index_size = hash_map.capacityIndexSize(header.bit_index);
const ptr = @ptrCast([*]align(@alignOf(IndexHeader)) u8, header);
const nbytes = @sizeOf(IndexHeader) + header.length() * index_size;
@memset(ptr + @sizeOf(IndexHeader), 0xff, nbytes - @sizeOf(IndexHeader));
@memset(ptr[@sizeOf(IndexHeader)..nbytes], 0xff);
}
// Verify that the header has sufficient alignment to produce aligned arrays.