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fix(Buffer): prevent integer bit truncation crash in files with extremely long lines

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CJ van den Berg 2024-07-02 12:43:52 +02:00
parent 5164164fd7
commit 581dbfb749
2 changed files with 5 additions and 5 deletions
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6
src/buffer/Buffer.zig
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@ -517,16 +517,16 @@ const Node = union(enum) {
return pred(ecg);
}
pub fn get_line_width_map(self: *const Node, line: usize, map: *ArrayList(u16), plane: Plane) error{ Stop, NoSpaceLeft }!void {
pub fn get_line_width_map(self: *const Node, line: usize, map: *ArrayList(usize), plane: Plane) error{ Stop, NoSpaceLeft }!void {
const Ctx = struct {
map: *ArrayList(u16),
map: *ArrayList(usize),
wcwidth: usize = 0,
fn walker(ctx_: *anyopaque, egc: []const u8, wcwidth: usize, _: Plane) Walker {
const ctx = @as(*@This(), @ptrCast(@alignCast(ctx_)));
var n = egc.len;
while (n > 0) : (n -= 1) {
const p = ctx.map.addOne() catch |e| return .{ .err = e };
p.* = @intCast(ctx.wcwidth);
p.* = ctx.wcwidth;
}
ctx.wcwidth += wcwidth;
return if (egc[0] == '\n') Walker.stop else Walker.keep_walking;