Hojun-Cho/ww
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os: graduate O_*, SEEK_* defs to flag and whence enums

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Mirrors Hare's `fs::flag` and `io::whence`:

    export type flag = enum i32 {
            RDONLY  = 0,
            WRONLY  = 1,
            RDWR    = 2,
            CREATE  = 64,    // 0o100
            TRUNC   = 512,   // 0o1000
    };

    export type whence = enum i32 { SET = 0, CUR = 1, END = 2 };

open/tryopen/lseek signatures take the enum types (`flags: flag`,
`w: whence`) so callers get type-checked: `os.open(p, os.flag.RDONLY,
0)` is the correct shape, and `os.flag.WRONLY | os.flag.CREATE |
os.flag.TRUNC` typechecks as a `flag` via the same-named-type rule.

Callers in selfhost/cmd/{ww,w6c,w6a,w6l,wwdump} updated from
`os.O_RDONLY` etc. to `os.flag.RDONLY`. SYS_* syscall numbers kept
as `def` for now (internal-only, ABI surface, no Hare analogue in
this scope).

selfhost/test/smoke.ww keeps its standalone-compile property by
using a numeric literal (`0`, RDONLY's value) for the open flags
arg — probe 6 in 990_selfhost compiles smoke.ww with no `use`
expansion, so cross-module type refs like `os.flag.RDONLY` can't
resolve there. Untyped 0 → flag via type_isnum.
This commit is contained in:
Hojun-Cho
2026-05-12 04:41:50 +09:00
parent 5149d10618
commit b9443b1f33
16 changed files with 202 additions and 154 deletions
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6
selfhost/cmd/w6l/main.ww
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@@ -99,7 +99,7 @@ fn buildpathv(dst: *u8, dir: *u8, name: *u8, v: u64) u64 = {
// islinkable: read first 8 bytes; require !<arch>\n or \x7fELF.
fn islinkable(path: *u8) bool = {
let fd: i32 = os.open(path, os.O_RDONLY, 0i32);
let fd: i32 = os.open(path, os.flag.RDONLY, 0i32);
if (fd < 0) { return false; };
let mp: *u8 = os.alloc(8u64): *u8;
let n: i64 = os.read(fd, mp, 8u64);
@@ -168,7 +168,7 @@ fn resolvelib(a: *arena, name: *u8, libdirs: **u8, nlibdirs: i32) *u8 = {
// Read first 20 bytes; return 1 for ET_DYN .so, 0 for ar/.o.
fn isso(path: *u8) i32 = {
let fd: i32 = os.open(path, os.O_RDONLY, 0i32);
let fd: i32 = os.open(path, os.flag.RDONLY, 0i32);
if (fd < 0) { return 0; };
let mp: *u8 = os.alloc(20u64): *u8;
let n: i64 = os.read(fd, mp, 20u64);
@@ -312,7 +312,7 @@ export fn main(argc: i32, argv: **u8) i32 = {
return 1;
};
let flags: i32 = os.O_WRONLY | os.O_CREAT | os.O_TRUNC;
let flags: os.flag = os.flag.WRONLY | os.flag.CREATE | os.flag.TRUNC;
let fd: i32 = os.open(outpath, flags, 493i32); // 0o755
if (fd < 0) {
os.write(2, "w6l: cannot open output\n".ptr, 23u64);