lib/fmt: port V-side modifier formatting (#94 fold-e6)

V's vfprintf parsed mods via scanmods but dropped them after parse —
vformatfield routed straight to vwriteone (no width / alignment / pad
/ sign / base / prec honoured). Port the OLD modifier path (fmt.ww:
443-641 rawlen* / formatraw / formatone) into vstream.ww as the v*
twins, widen vformatfield to take *mods, and pass &m through vfprintf
at the call site.

The v* helpers mirror OLD verbatim (compute body identical; vputbytes
+ (size | io.error) routing replacing putbytes + (i32 | io.closed));
shared compute helpers (signof / digitsu64 / basenum) and modifier
enums (neg / alignment / mods) are reused directly from fmt.ww via
package scope. fmt.ww UNCHANGED — fold-eFinal (#50) collapses both
surfaces and dedupes the rawlen-family.

drew NaN/Inf signoff: strconv.f64tos / f32tos already render
"nan"/"infinity" with no leading '-', so the sign-peel in vrawlenf64
+ vformatraw f64 arm is a no-op on those views (same OLD path at
fmt.ww:520-562).

ken cs==ww mechanical: both stages compile the new V-side identically;
990-997 byte-id gates + combined_ww_fresh stay green (fmt is not
embedded in any selfhost main.combined.ww — grep verified pre-impl).

test/wcc/780_fmt_vstream_mods_run.c (cstage-only per #209): 5 rows
covering width / precision / base_hex / sign_plus / zero_pad. STAGE_WW
blocked by #209 (wwstage formattable match-arm bail), same carve-out
as 777_fmt_vstream_run.
This commit is contained in:
2026-05-29 11:50:55 +09:00
parent d87ee01cdf
commit a3f3153943
3 changed files with 604 additions and 13 deletions

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@@ -328,6 +328,7 @@ TESTS = $(BIN)/test_smoke $(BIN)/test_lex $(BIN)/test_parse $(BIN)/test_check \
$(BIN)/test_io_vtable_run \
$(BIN)/test_memio_vstream_run \
$(BIN)/test_fmt_vstream_run \
$(BIN)/test_fmt_vstream_mods_run \
$(BIN)/test_bufio_vstream_run \
$(BIN)/test_log_vstream_run \
$(BIN)/test_use_promote_alias \
@@ -706,6 +707,13 @@ $(BIN)/test_fmt_vstream_run: test/wcc/777_fmt_vstream_run.c \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_fmt_vstream_mods_run: test/wcc/780_fmt_vstream_mods_run.c \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \
lib/fmt/fmt.ww lib/fmt/vstream.ww \
$(LIB)/libwwrt.a | $(BIN)
$(CC) $(CFLAGS) -o $@ $<
$(BIN)/test_bufio_vstream_run: test/wcc/778_bufio_vstream_run.c \
$(BIN)/ww $(BIN)/w6c $(BIN)/w6a $(BIN)/w6l \
$(BIN)/ww_ww $(BIN)/w6c_ww $(BIN)/w6a_ww $(BIN)/w6l_ww \

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@@ -39,7 +39,15 @@
// because the OLD versions take `*io.stream` (the legacy struct) and
// fmt.ww must stay UNCHANGED this fold. Shared bits — `i64dec`,
// `modsinit`, `scandigits`, `scanmods`, `formattable`, `field`,
// `mods`, `fmtabort` — are reused directly from fmt.ww (same package).
// `mods`, `fmtabort`, `signof`, `digitsu64`, `basenum`, the modifier
// enums (`neg`, `alignment`) — are reused directly from fmt.ww (same
// package). The v* modifier-formatting helpers (vrawleni64 / vrawlenstr
// / vrawlenf64 / vrawlen / vformatraw / vformatone) mirror the OLD
// rawlen* / formatraw / formatone verbatim (compute body identical;
// vputbytes + (size | io.error) routing instead of putbytes +
// (i32 | io.closed)) — #94 fold-e6 ports them V-side so V's printf
// honours modifiers (fold-e3 dropped them after parse). eFinal (#50)
// collapses both surfaces.
//
// Sibling tasks parked here (filed, NOT fixed):
//
@@ -136,33 +144,253 @@ fn vwriteone(vs: io.vstream, a: formattable) (size | io.error) = {
return 0: size;
};
// vformatfield — field→formattable inline-per-arm dispatch. The
// for-loop call site in vfprintf would trip task #18 (silent
// miscompile of 24B return-by-value in for-loop context) if widened
// via a helper; inline-per-arm sidesteps it — same shape OLD
// ---- V-side modifier formatting (port of OLD rawlen*/formatraw/
// formatone from fmt.ww:443-641). Project #94 fold-e6.
//
// V-side mirror of the OLD modifier-formatting machinery so the V
// printf path honours width / alignment / pad / sign / base / prec
// instead of dropping mods after parse. Drew-signoff: NaN/Inf safe
// — strconv.f64tos / f32tos render "nan"/"infinity" with no leading
// '-', so the sign-peel in vrawlenf64 / vformatraw f64 arm is a
// no-op on those views (sibling of OLD rawlenf64's same path). Ken-
// signoff: cs==ww mechanical — both stages compile the new V-side
// identically; eFinal (#50) graduates the V-side over the OLD.
//
// Helpers mirror fmt.ww verbatim (compute-only, no I/O) rather than
// reusing OLD by call — fold-eFinal (#50) atomically deletes the OLD
// surface AND collapses these v* names back, so the duplication is
// transient. Mirror sites:
//
// vrawleni64 fmt.ww:443 rawleni64
// vrawlenstr fmt.ww:457 rawlenstr
// vrawlenf64 fmt.ww:569 rawlenf64
// vrawlen fmt.ww:585 rawlen
// vformatraw fmt.ww:465 formatraw
// vformatone fmt.ww:598 formatone
// vrawleni64 — bytes the raw render of `v` under `m` would emit; the
// signof / digitsu64 / basenum helpers are read from fmt.ww (same
// package). Mirror fmt.ww:443.
fn vrawleni64(v: i64, m: *mods) i32 = {
let neg_flag: bool = v < 0;
let u: u64 = v: u64;
if (neg_flag) { u = (-v): u64; };
let signlen: i32 = 0;
if (signof(neg_flag, m) != 0u8) { signlen = 1; };
let dlen: i32 = digitsu64(u, basenum(m.base));
let inner: i32 = dlen;
if (m.prec > signlen + dlen) { inner = m.prec - signlen; };
return signlen + inner;
};
// vrawlenstr — bytes the raw render of `s` would emit (after `prec`
// truncation). Mirror fmt.ww:457.
fn vrawlenstr(s: str, m: *mods) i32 = {
if (m.prec > 0 && m.prec < s.len) { return m.prec; };
return s.len;
};
// vrawlenf64 — bytes the raw render of `v` under `m` would emit; the
// strconv.f64tos static-buffer view is consumed by reading view.len
// + view.ptr[0] before the sign byte is folded into signof. Mirror
// fmt.ww:569; drew NaN/Inf safe (strconv emits no leading '-' on
// nan/inf, so the peel is a no-op on those views).
fn vrawlenf64(v: f64, m: *mods) i32 = {
let view: str = strconv.f64tos(v);
let body: i32 = view.len;
let had_neg: bool = false;
if (body > 0 && view.ptr[0] == 45u8) {
had_neg = true;
body -= 1;
};
let signlen: i32 = 0;
if (signof(had_neg, m) != 0u8) { signlen = 1; };
return signlen + body;
};
// vrawlen — dispatch the rawlen sum over formattable. Mirror fmt.ww:585.
fn vrawlen(arg: formattable, m: *mods) i32 = {
match (arg) {
case let v: i64 => return vrawleni64(v, m);
case let v: str => return vrawlenstr(v, m);
case let b: bool => { if (b) { return 4; }; return 5; };
case let r: rune => return 1;
case let v: f64 => return vrawlenf64(v, m);
};
return 0; // unreachable — match is exhaustive
};
// vformatraw — write the bare value (no width padding) to `vs`. Mirror
// fmt.ww:465 formatraw, vputbytes-routed and (size | io.error)-typed.
// `prec` ignored on f64 (strconv.f64tos is shortest-G with no precision
// knob); base ignored on f64 (Hare too — base is int-only). Drew-
// signoff: NaN/Inf strings emitted unchanged via vputbytes.
fn vformatraw(vs: io.vstream, arg: formattable, m: *mods) (size | io.error) = {
match (arg) {
case let v: i64 => {
let neg_flag: bool = v < 0;
let u: u64 = v: u64;
if (neg_flag) { u = (-v): u64; };
let sb: u8 = signof(neg_flag, m);
let total: size = 0;
if (sb != 0u8) {
let buf: [1]u8;
buf[0] = sb;
let r: (size | io.error) = vputbytes(vs, &buf[0], 1);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
};
let dlen: i32 = digitsu64(u, basenum(m.base));
let signlen: i32 = 0;
if (sb != 0u8) { signlen = 1; };
let pad0: i32 = 0;
if (m.prec > signlen + dlen) { pad0 = m.prec - signlen - dlen; };
let pi: i32 = 0;
for (pi < pad0) {
let buf: [1]u8;
buf[0] = 48u8; // '0'
let r: (size | io.error) = vputbytes(vs, &buf[0], 1);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
pi += 1;
};
let view: str = strconv.u64tos(u, m.base);
let r: (size | io.error) = vputbytes(vs, view.ptr, view.len);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
return total;
};
case let v: str => {
let n: i32 = vrawlenstr(v, m);
return vputbytes(vs, v.ptr, n);
};
case let b: bool => {
let v: str = "false";
if (b) { v = "true"; };
return vputbytes(vs, v.ptr, v.len);
};
case let r: rune => {
let buf: [4]u8;
buf[0] = r: u8;
return vputbytes(vs, &buf[0], 1);
};
case let v: f64 => {
// strconv.f64tos prepends '-' for negative values; peel
// here so signof folds neg/plus/space mods uniformly with
// the i64 arm. Drew NaN/Inf signoff: nan/infinity views
// have no leading '-', so this peel is a no-op for them
// (sign-mod on a nan emits e.g. "+nan" — a fmt-layer edge,
// not strconv's; same OLD behaviour at fmt.ww:520-562).
let view: str = strconv.f64tos(v);
let neg_flag: bool = false;
if (view.len > 0 && view.ptr[0] == 45u8) { // '-'
neg_flag = true;
view.ptr = view.ptr + 1u64;
view.len -= 1;
};
let sb: u8 = signof(neg_flag, m);
let total: size = 0;
if (sb != 0u8) {
let buf: [1]u8;
buf[0] = sb;
let r: (size | io.error) = vputbytes(vs, &buf[0], 1);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
};
let r: (size | io.error) = vputbytes(vs, view.ptr, view.len);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
return total;
};
};
let z: size = 0; return z; // unreachable — match is exhaustive
};
// vformatone — render `arg` to `vs` with `m`'s width / alignment / pad
// applied. Mirror fmt.ww:598 formatone; the tail-pad loop drives on
// a counter (mirrors OLD) because vputbytes over memio.fixed reports
// a full buffer as a 0-byte partial write, not io.error — looping on
// `total < m.width` would spin on bsprintf_v when the sink runs out.
fn vformatone(vs: io.vstream, arg: formattable, m: *mods) (size | io.error) = {
let start: i32 = 0;
if (m.width > 0 && m.alignment != alignment.LEFT) {
let raw: i32 = vrawlen(arg, m);
let pad: i32 = 0;
if (raw < m.width) { pad = m.width - raw; };
if (m.alignment == alignment.CENTER) { start = (pad + 1) / 2; }
else { start = pad; };
};
let total: size = 0;
let i: i32 = 0;
let padb: [1]u8;
padb[0] = m.pad: u8;
for (i < start) {
let r: (size | io.error) = vputbytes(vs, &padb[0], 1);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
i += 1;
};
let r1: (size | io.error) = vformatraw(vs, arg, m);
match (r1) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
let need: i32 = 0;
let twidth: size = m.width: size;
if (twidth > total) { need = (twidth - total): i32; };
let j: i32 = 0;
for (j < need) {
let r: (size | io.error) = vputbytes(vs, &padb[0], 1);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;
};
j += 1;
};
return total;
};
// vformatfield — field→formattable inline-per-arm dispatch through
// vformatone. The for-loop call site in vfprintf would trip task #18
// (silent miscompile of 24B return-by-value in for-loop context) if
// widened via a helper; inline-per-arm sidesteps it — same shape OLD
// formatfield uses at fmt.ww:648. `*mods` arm aborts (parametric '%'
// form not implemented; OLD fprintf aborts identically).
fn vformatfield(vs: io.vstream, f: field) (size | io.error) = {
// form not implemented; OLD fprintf aborts identically). #94 fold-e6
// widens the signature with `*mods` so the V path honours modifiers
// (fold-e3 dropped them after parse).
fn vformatfield(vs: io.vstream, f: field, m: *mods) (size | io.error) = {
match (f) {
case let v: i64 => {
let a: formattable = v;
return vwriteone(vs, a);
return vformatone(vs, a, m);
};
case let v: str => {
let a: formattable = v;
return vwriteone(vs, a);
return vformatone(vs, a, m);
};
case let b: bool => {
let a: formattable = b;
return vwriteone(vs, a);
return vformatone(vs, a, m);
};
case let r: rune => {
let a: formattable = r;
return vwriteone(vs, a);
return vformatone(vs, a, m);
};
case let v: f64 => {
let a: formattable = v;
return vwriteone(vs, a);
return vformatone(vs, a, m);
};
case let p: *mods => { fmtabort(); let z: size = 0; return z; };
};
@@ -236,7 +464,7 @@ export fn vfprintf(vs: io.vstream, fmt: str, args: field...) (size | io.error) =
if (i >= fmt.len || fmt[i] != 125u8) { fmtabort(); };
i += 1;
if (idx >= args.len) { fmtabort(); };
let r: (size | io.error) = vformatfield(vs, args[idx]);
let r: (size | io.error) = vformatfield(vs, args[idx], &m);
match (r) {
case let n: size => { total += n; };
case let e: io.error => return e;

View File

@@ -0,0 +1,355 @@
/*
* 780_fmt_vstream_mods_run — project #94 fold-e6 sentinel. Pins the
* V-side modifier-formatting machinery (vrawleni64 / vrawlenstr /
* vrawlenf64 / vrawlen / vformatraw / vformatone) in lib/fmt/
* vstream.ww. Before fold-e6, the V printf path parsed mods via
* scanmods but dropped them after parse: vformatfield routed straight
* to vwriteone (no width / alignment / pad / sign / base / prec
* honoured). fold-e6 widens vformatfield to take `*mods` and routes
* through vformatone — same dispatch shape as OLD formatfield at
* fmt.ww:648. Coexists with the OLD modifier path at fmt.ww:443-641
* (fmt.ww UNCHANGED this fold); fold-eFinal (task #50) collapses both
* surfaces.
*
* Each row imports fmt + os + io, opens a per-process /tmp output
* file, calls fdprintf_v with a {:mods} format string + one arg, and
* asserts the exact byte content read back.
*
* Cstage-only per row — pre-existing wwstage bug #209 (sibling of
* #190): the wwstage checker bails on fmt.formattable match-arms
* whenever a downstream probe `import fmt;`s the package. Identical
* carve-out to 777_fmt_vstream_run (cited there at line 18-33).
* Byte-id graduates with #209 close.
*
* row | format | arg | expect | exit
* -----------------+------------+--------------+-----------+-----
* width | "{:5}" | 42i64 | " 42" | 50
* precision | "{:.3}" | "hello" | "hel" | 51
* base_hex | "{:x}" | 255i64 | "ff" | 52
* sign_plus | "{:+}" | 7i64 | "+7" | 53
* zero_pad | "{:_05}" | 42i64 | "00042" | 54
*
* Modifier surface exercised (subset of scanmods at fmt.ww:376-405):
*
* width digits 1..9 — RIGHT-align pad to N chars
* prec '.' + digits — str truncation / int min-digits
* base 'x' — strconv.base.HEX_LOWER
* neg '+' — emit '+' on non-negative
* pad '_<rune>' — pad rune override (default space when ':')
*
* Drew NaN/Inf signoff (carry from task #58): f64 arm not exercised
* here (rows pin i64+str+bool fastpaths); follow-on fold can add f64
* once Drew's strconv.f64tos shortest-G stays static. The fold-e6
* implementation honours the sign-peel in vformatraw f64 arm; an
* end-to-end test lands when a NaN/Inf-aware probe joins the corpus.
*
* IMPORT-ORDER WORKAROUND (sibling task #208, pre-existing): every
* row places `import os;` FIRST for the same reason 776/777 document
* (wwstage checker ordering-sensitivity on os.tryread/trywrite/
* tryopen's bare `return r;` over a tagged return type).
*
* SIBLINGS (filed inline, NOT fixed here — fold-e6 is purely additive
* over fold-e1/e2/e3/e4/e5's frozen io.* + memio.* + fmt.* + bufio.*
* + log.* surface):
*
* - #209 (wwstage formattable match-arm bail): blocks STAGE_WW
* here, same as 777_fmt_vstream_run. Cstage-only until close.
* - eFinal (#50): collapses V + OLD surfaces; the `v*` names rename
* off and the OLD rawlen* / formatraw / formatone delete. The v*
* duplication of the rawlen-family today is transient — eFinal
* dedupes.
*
* BOOTSTRAP-EMBED CHECK: fmt is NOT embedded in any selfhost
* combined.ww (grep confirmed pre-impl). Adding modifier formatting
* to lib/fmt/vstream.ww does NOT require a Makefile regen (#110);
* only test paths see the new machinery. 990-997 byte-id gates stay
* green by virtue of fmt being test-only on the bootstrap surface.
*
* GATE POLARITY: must stay GREEN. A red here means vformatone /
* vformatraw / vrawlen miscomputed bytes, vformatfield regressed its
* *mods route, scanmods/modsinit (shared from fmt.ww) drifted, or
* the strconv.u64tos base path miscompiled under fdprintf_v's
* intrusive vstream→*fd_ctx dispatch.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>
static int
runwait(const char *cmd)
{
int rc = system(cmd);
if (rc == -1) return -1;
if (WIFEXITED(rc)) return WEXITSTATUS(rc);
return -1;
}
#define STAGE_CS 1
#define STAGE_WW 2
struct row {
const char *label;
const char *src;
int want_exit;
int stage_mask;
int byte_id;
};
static const struct row rows[] = {
{ "width",
"package main;\n"
"import os;\n"
"import fmt;\n"
"import io;\n"
"export fn main() i32 = {\n"
" let path: str = \"/tmp/wwfmtv_780_a\";\n"
" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
" if (fd < 0) { return 90; };\n"
" let wr = fmt.fdprintf_v(fd, \"{:5}\", 42i64);\n"
" let nw: size = 0;\n"
" match (wr) {\n"
" case let n: size => { nw = n; };\n"
" case io.error => { return 91; };\n"
" };\n"
" os.close(fd);\n"
" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
" if (rd < 0) { return 92; };\n"
" let buf: [16]u8;\n"
" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
" os.close(rd);\n"
" if (n != 5i64) { return 93; };\n"
" if (nw != 5: size) { return 94; };\n"
" if (buf[0] != 32u8 || buf[1] != 32u8 || buf[2] != 32u8 || buf[3] != 52u8 || buf[4] != 50u8) { return 95; };\n"
" return 50;\n"
"};\n",
50,
STAGE_CS, 0 },
{ "precision",
"package main;\n"
"import os;\n"
"import fmt;\n"
"import io;\n"
"export fn main() i32 = {\n"
" let path: str = \"/tmp/wwfmtv_780_b\";\n"
" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
" if (fd < 0) { return 90; };\n"
" let wr = fmt.fdprintf_v(fd, \"{:.3}\", \"hello\");\n"
" let nw: size = 0;\n"
" match (wr) {\n"
" case let n: size => { nw = n; };\n"
" case io.error => { return 91; };\n"
" };\n"
" os.close(fd);\n"
" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
" if (rd < 0) { return 92; };\n"
" let buf: [16]u8;\n"
" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
" os.close(rd);\n"
" if (n != 3i64) { return 93; };\n"
" if (nw != 3: size) { return 94; };\n"
" if (buf[0] != 104u8 || buf[1] != 101u8 || buf[2] != 108u8) { return 95; };\n"
" return 51;\n"
"};\n",
51,
STAGE_CS, 0 },
{ "base_hex",
"package main;\n"
"import os;\n"
"import fmt;\n"
"import io;\n"
"export fn main() i32 = {\n"
" let path: str = \"/tmp/wwfmtv_780_c\";\n"
" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
" if (fd < 0) { return 90; };\n"
" let wr = fmt.fdprintf_v(fd, \"{:x}\", 255i64);\n"
" let nw: size = 0;\n"
" match (wr) {\n"
" case let n: size => { nw = n; };\n"
" case io.error => { return 91; };\n"
" };\n"
" os.close(fd);\n"
" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
" if (rd < 0) { return 92; };\n"
" let buf: [16]u8;\n"
" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
" os.close(rd);\n"
" if (n != 2i64) { return 93; };\n"
" if (nw != 2: size) { return 94; };\n"
" if (buf[0] != 102u8 || buf[1] != 102u8) { return 95; };\n"
" return 52;\n"
"};\n",
52,
STAGE_CS, 0 },
{ "sign_plus",
"package main;\n"
"import os;\n"
"import fmt;\n"
"import io;\n"
"export fn main() i32 = {\n"
" let path: str = \"/tmp/wwfmtv_780_d\";\n"
" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
" if (fd < 0) { return 90; };\n"
" let wr = fmt.fdprintf_v(fd, \"{:+}\", 7i64);\n"
" let nw: size = 0;\n"
" match (wr) {\n"
" case let n: size => { nw = n; };\n"
" case io.error => { return 91; };\n"
" };\n"
" os.close(fd);\n"
" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
" if (rd < 0) { return 92; };\n"
" let buf: [16]u8;\n"
" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
" os.close(rd);\n"
" if (n != 2i64) { return 93; };\n"
" if (nw != 2: size) { return 94; };\n"
" if (buf[0] != 43u8 || buf[1] != 55u8) { return 95; };\n"
" return 53;\n"
"};\n",
53,
STAGE_CS, 0 },
{ "zero_pad",
"package main;\n"
"import os;\n"
"import fmt;\n"
"import io;\n"
"export fn main() i32 = {\n"
" let path: str = \"/tmp/wwfmtv_780_e\";\n"
" let fd: i32 = os.open(path, os.flag.RDWR | os.flag.CREATE | os.flag.TRUNC, 0o644: i32);\n"
" if (fd < 0) { return 90; };\n"
" let wr = fmt.fdprintf_v(fd, \"{:_05}\", 42i64);\n"
" let nw: size = 0;\n"
" match (wr) {\n"
" case let n: size => { nw = n; };\n"
" case io.error => { return 91; };\n"
" };\n"
" os.close(fd);\n"
" let rd: i32 = os.open(path, os.flag.RDONLY, 0i32);\n"
" if (rd < 0) { return 92; };\n"
" let buf: [16]u8;\n"
" let n: i64 = os.read(rd, &buf[0], 16u64);\n"
" os.close(rd);\n"
" if (n != 5i64) { return 93; };\n"
" if (nw != 5: size) { return 94; };\n"
" if (buf[0] != 48u8 || buf[1] != 48u8 || buf[2] != 48u8 || buf[3] != 52u8 || buf[4] != 50u8) { return 95; };\n"
" return 54;\n"
"};\n",
54,
STAGE_CS, 0 },
};
static int
write_source(const char *path, const char *src)
{
FILE *f = fopen(path, "wb");
if (!f) return -1;
fputs(src, f);
fclose(f);
return 0;
}
/* Per-row tmpdir cleanup. ww_ww writes intermediates next to the
* source (filed task #15), so each row's build leaves
* <src>.{combined.ww,s,o} + bare exe alongside. Mirror of 777's. */
static void
cleanup_tmp(const char *tmpdir, const char *base)
{
char p[640];
snprintf(p, sizeof p, "%s/%s.ww", tmpdir, base); unlink(p);
snprintf(p, sizeof p, "%s/%s.s", tmpdir, base); unlink(p);
snprintf(p, sizeof p, "%s/%s.o", tmpdir, base); unlink(p);
snprintf(p, sizeof p, "%s/%s.combined.ww", tmpdir, base); unlink(p);
snprintf(p, sizeof p, "%s/%s", tmpdir, base); unlink(p);
rmdir(tmpdir);
}
static int
build_via_driver(const char *driver, const char *tmpdir, const char *cwd,
const char *src)
{
char cmd[2048];
snprintf(cmd, sizeof cmd,
"cd %s && timeout 180 %s build -I %s/lib %s 2>/dev/null",
tmpdir, driver, cwd, src);
return runwait(cmd);
}
static int
run_row(const char *driver, const char *cwd, const struct row *r, int seq)
{
char tmpdir[256], src[512], base[64], outbin[768];
snprintf(tmpdir, sizeof tmpdir, "/tmp/fvm_%d_d_%d", getpid(), seq);
snprintf(base, sizeof base, "main780");
snprintf(src, sizeof src, "%s/%s.ww", tmpdir, base);
mkdir(tmpdir, 0755);
if (write_source(src, r->src) != 0) { cleanup_tmp(tmpdir, base); return -1; }
int rc;
int br = build_via_driver(driver, tmpdir, cwd, src);
if (br == 0) {
snprintf(outbin, sizeof outbin, "%s/%s", tmpdir, base);
rc = runwait(outbin);
} else {
rc = -1;
}
cleanup_tmp(tmpdir, base);
return rc;
}
int
main(void)
{
const char *bin = getenv("BIN");
if (!bin) bin = "out/bin";
char cwd[256];
if (getcwd(cwd, sizeof cwd) == NULL) return 1;
char absbin[512];
if (bin[0] != '/') {
snprintf(absbin, sizeof absbin, "%s/%s", cwd, bin);
bin = absbin;
}
char cdrv[640], wdrv[640];
snprintf(cdrv, sizeof cdrv, "%s/ww", bin);
snprintf(wdrv, sizeof wdrv, "%s/ww_ww", bin);
int n = (int)(sizeof rows / sizeof rows[0]);
int total = 0, fail = 0;
int wwpresent = (access(wdrv, X_OK) == 0);
int seq = 0;
for (int i = 0; i < n; i++) {
if (rows[i].stage_mask & STAGE_CS) {
total++;
int got = run_row(cdrv, cwd, &rows[i], seq++);
if (got != rows[i].want_exit) {
fprintf(stderr,
"fmt_vstream_mods_run[cs][%s]: exit=%d want=%d\n",
rows[i].label, got, rows[i].want_exit);
fail++;
}
}
if (wwpresent && (rows[i].stage_mask & STAGE_WW)) {
total++;
int got = run_row(wdrv, cwd, &rows[i], seq++);
if (got != rows[i].want_exit) {
fprintf(stderr,
"fmt_vstream_mods_run[ww][%s]: exit=%d want=%d\n",
rows[i].label, got, rows[i].want_exit);
fail++;
}
}
}
if (!wwpresent)
fprintf(stderr, "fmt_vstream_mods_run: skip wwstage (no %s)\n", wdrv);
if (fail) {
fprintf(stderr, "fmt_vstream_mods_run: %d/%d fixtures failed\n",
fail, total);
return 1;
}
printf("fmt_vstream_mods_run: %d/%d ok\n", total, total);
return 0;
}