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fix: incredible bug #3

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Merged
Hanaasagi merged 1 commit into from
Nov 29, 2025
Merged

fix: incredible bug #3

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20 changes: 19 additions & 1 deletion src/lib.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -19,14 +19,32 @@ const RAW_POINTERS = @embedFile("./pointers.bin");
const MAPPING = @embedFile("./mapping.txt");
var POINTERS: *[]const Ptr = @ptrCast(@alignCast(@constCast(&RAW_POINTERS)));

comptime {
if (@sizeOf(Ptr) != 3) {
@compileError("Ptr layout mismatch");
}
}

// Convert Unicode points to their ASCII representation. Write to the dest, and return the slice.
// If not found, return null. Additionally, the function can also write an empty string.
pub fn getReplacement(cp: u21) ?[]const u8 {
const ptr_size = @sizeOf(Ptr);
comptime {
if (RAW_POINTERS.len % ptr_size != 0) {
@compileError("pointers.bin size is not a multiple of Ptr");
}
}

const i = @as(usize, cp);
if (i >= POINTERS.*.len) {
// DO NOT USE POINTERS.*.len
const count = RAW_POINTERS.len / ptr_size;
if (i >= count) {
return null;
}

// Trick
POINTERS.*.len = count;

const p = POINTERS.*[i];

// if length is 1 or 2, then the "pointer" data is used to store the char
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