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Folkert 2023-10-08 23:00:44 +02:00
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46
crates/compiler/builtins/bitcode/src/str.zig
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@ -259,19 +259,49 @@ pub const RocStr = extern struct {
const old_length = self.len();
const delta_length = new_length - old_length;
var result = RocStr.allocate(new_length);
const element_width = 1;
const result_is_big = new_length >= SMALL_STRING_SIZE;
// transfer the memory
if (result_is_big) {
const capacity = utils.calculateCapacity(0, new_length, element_width);
var result = RocStr.allocateBig(new_length, capacity);
const source_ptr = self.asU8ptr();
const dest_ptr = result.asU8ptrMut();
// transfer the memory
std.mem.copy(u8, dest_ptr[0..old_length], source_ptr[0..old_length]);
std.mem.set(u8, dest_ptr[old_length .. old_length + delta_length], 0);
const source_ptr = self.asU8ptr();
const dest_ptr = result.asU8ptrMut();
self.decref();
const builtin = @import("builtin");
if (builtin.target.cpu.arch != .wasm32) {
std.debug.print("allocating a big thing? {s}\n", .{source_ptr[0..old_length]});
}
return result;
std.mem.copy(u8, dest_ptr[0..old_length], source_ptr[0..old_length]);
std.mem.set(u8, dest_ptr[old_length .. old_length + delta_length], 0);
self.decref();
return result;
} else {
var string = RocStr.empty();
const dest_ptr = @ptrCast([*]u8, &string);
dest_ptr[@sizeOf(RocStr) - 1] = @intCast(u8, new_length) | 0b1000_0000;
const source_ptr = self.asU8ptr();
const builtin = @import("builtin");
if (builtin.target.cpu.arch != .wasm32) {
std.debug.print("allocating a small thing? {s}\n", .{source_ptr[0..old_length]});
}
std.mem.copy(u8, dest_ptr[0..old_length], source_ptr[0..old_length]);
std.mem.set(u8, dest_ptr[old_length .. old_length + delta_length], 0);
self.decref();
return string;
}
}
pub fn isSmallStr(self: RocStr) bool {