Hojun-Cho
e8d3d89fef
New `w6c -I <out.wwi>` flag (both stages) writes a re-parseable ww-prototype rendering of a package's EXPORTED surface. M2 dead-code: nothing consumes .wwi yet (combined.ww stays the live path); the flag is off on every existing invocation, so the 990-997 byte-id gates and all prior tests are unperturbed. The unparse walks the AST type-expr subtree (N_T* nodes), not the tinfo Type* (which collapses nominal pkg.Name identity). Deterministic output: package line, byte-sorted imports, byte-sorted decls — a pure function of the exported API. cmd/w6c/wwi.c + selfhost/cmd/wcc/wwi.ww emit byte-identical .wwi (new cross-stage byte-id substrate, rule 10). check_exported_type (drew) rides the producer entry, flag-gated: an exported signature naming a non-exported nominal is loud-rejected before any byte is written, identically on both stages. Ports harec check.c:4092-4168, recursing the type-AST and gating on the resolved SK_TYPE sym's decl export flag (Sym.exported is vestigial in both stages; the predeclared synthetic `nomem` decl carries no source position and is treated as a builtin leaf — cstage parity). Two wwstage checker AST-mutations are normalized to cstage's pristine view for byte-id: the N_TPARAM tuple-element wrapper (unwrapped) and the variadic `T...`→`[]T` param desugar (peeled). Gate 989_m2wwi_run: ascii/strings/getopt each produce a .wwi that re-parses (wwdump -a) and is cs==ww byte-identical; a private-type-leak fixture is rejected identically by both stages (non-vacuous check).
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
/*
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* w6c — amd64 compiler driver. Reads a .ww source file, runs the
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* libwcc frontend (lex → parse → check), then walks the typed AST
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* via cgen.c and writes Plan 9-flavoured amd64 asm to stdout (or
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* the file given by -o).
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*/
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#include "gc.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static int
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slurp(const char *path, char **outbuf, u64 *outlen)
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{
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FILE *f = fopen(path, "rb");
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if (f == NULL) return -1;
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fseek(f, 0, SEEK_END);
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long n = ftell(f);
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fseek(f, 0, SEEK_SET);
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if (n < 0) { fclose(f); return -1; }
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char *b = malloc((size_t)n + 1);
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if (b == NULL) { fclose(f); return -1; }
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if (fread(b, 1, (size_t)n, f) != (size_t)n) { free(b); fclose(f); return -1; }
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b[n] = '\0';
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fclose(f);
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*outbuf = b;
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*outlen = (u64)n;
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return 0;
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}
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int
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main(int argc, char **argv)
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{
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const char *src = NULL;
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const char *out = NULL;
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const char *wwiout = NULL; /* -I <out.wwi>: M2 export-data producer */
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int testmode = 0;
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for (int i = 1; i < argc; i++) {
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const char *a = argv[i];
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if (strcmp(a, "-o") == 0 && i + 1 < argc) {
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out = argv[++i];
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} else if (strcmp(a, "-I") == 0 && i + 1 < argc) {
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wwiout = argv[++i];
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} else if (strcmp(a, "-T") == 0) {
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testmode = 1;
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} else if (a[0] == '-') {
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fprintf(stderr, "w6c: unknown flag %s\n", a);
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return 2;
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} else if (src == NULL) {
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src = a;
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} else {
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fprintf(stderr, "w6c: only one input supported\n");
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return 2;
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}
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}
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if (src == NULL) {
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fputs("usage: w6c [-T] [-o out.s] file.ww\n", stderr);
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return 2;
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}
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char *buf;
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u64 len;
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if (slurp(src, &buf, &len) < 0) {
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fprintf(stderr, "w6c: %s: cannot read\n", src);
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return 1;
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}
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Arena *a = newarena();
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Lex l;
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Parser p;
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Checker c;
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Cg cg;
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lexinit(&l, a, src, buf, len);
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parserinit(&p, a, &l);
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Node *file = parsefile(&p);
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if (l.errs || p.errs) return 1;
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check_init(&c, a);
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c.is_test = testmode;
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check_file(&c, file);
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if (c.errs) return 1;
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/* M2 export-data: write the `.wwi` after a clean check, before cgen.
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* Dead on the live path (no existing invocation passes -I); the
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* producer's check_exported_type may reject a dangling export. */
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if (wwiout) {
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FILE *wf = fopen(wwiout, "wb");
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if (wf == NULL) {
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fprintf(stderr, "w6c: cannot open %s\n", wwiout);
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return 1;
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}
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if (wwi_emit(&c, wf, file) != 0) { fclose(wf); return 1; }
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fclose(wf);
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}
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FILE *of = stdout;
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if (out) {
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of = fopen(out, "wb");
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if (of == NULL) {
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fprintf(stderr, "w6c: cannot open %s\n", out);
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return 1;
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}
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}
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cg_init(&cg, a);
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cg_file(&cg, of, file);
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if (of != stdout) fclose(of);
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freearena(a);
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free(buf);
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return 0;
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}
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