ref: a16c4e637079bb3d7f1cb93ae9b2348d710c003f
dir: /parse/use.c/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "parse.h"
static void wrtype(FILE *fd, Type *val);
static void rdtype(FILE *fd, Type **dest);
static void wrstab(FILE *fd, Stab *val);
static Stab *rdstab(FILE *fd);
static void wrsym(FILE *fd, Node *val);
static Node *rdsym(FILE *fd, Trait *ctx);
static void pickle(FILE *fd, Node *n);
static Node *unpickle(FILE *fd);
/* type fixup list */
static Htab *tydedup; /* map from name -> type, contains all Tynames loaded ever */
static Htab *tidmap; /* map from tid -> type */
static Htab *trmap; /* map from trait id -> trait */
#define Builtinmask (1 << 30)
static Type ***typefixdest; /* list of types we need to replace */
static size_t ntypefixdest; /* size of replacement list */
static intptr_t *typefixid; /* list of types we need to replace */
static size_t ntypefixid; /* size of replacement list */
static Trait ***traitfixdest; /* list of traits we need to replace */
static size_t ntraitfixdest; /* size of replacement list */
static Type **traitfixtype; /* list of types we need to set the trait on */
static size_t ntraitfixtype; /* size of replacement list */
static intptr_t *traitfixid; /* list of traits we need to replace */
static size_t ntraitfixid; /* size of replacement list */
/* Outputs a symbol table to file in a way that can be
* read back usefully. Only writes declarations, types
* and sub-namespaces. Captured variables are ommitted. */
static void wrstab(FILE *fd, Stab *val)
{
size_t n, i;
void **keys;
wrstr(fd, val->name);
/* write decls */
keys = htkeys(val->dcl, &n);
wrint(fd, n);
for (i = 0; i < n; i++)
wrsym(fd, getdcl(val, keys[i]));
free(keys);
/* write types */
keys = htkeys(val->ty, &n);
wrint(fd, n);
for (i = 0; i < n; i++) {
pickle(fd, keys[i]); /* name */
wrtype(fd, gettype(val, keys[i])); /* type */
}
free(keys);
/* write stabs */
keys = htkeys(val->ns, &n);
wrint(fd, n);
for (i = 0; i < n; i++)
wrstab(fd, getns(val, keys[i]));
free(keys);
}
/* Reads a symbol table from file. The converse
* of wrstab. */
static Stab *rdstab(FILE *fd)
{
Stab *st;
Type *ty;
Node *nm;
int n;
int i;
/* read dcls */
st = mkstab();
st->name = rdstr(fd);
n = rdint(fd);
for (i = 0; i < n; i++)
putdcl(st, rdsym(fd, NULL));
/* read types */
n = rdint(fd);
for (i = 0; i < n; i++) {
nm = unpickle(fd);
rdtype(fd, &ty);
puttype(st, nm, ty);
}
/* read stabs */
n = rdint(fd);
for (i = 0; i < n; i++)
putns(st, rdstab(fd));
return st;
}
static void wrucon(FILE *fd, Ucon *uc)
{
wrint(fd, uc->loc.line);
wrint(fd, uc->id);
wrbool(fd, uc->synth);
pickle(fd, uc->name);
wrbool(fd, uc->etype != NULL);
if (uc->etype)
wrtype(fd, uc->etype);
}
static Ucon *rducon(FILE *fd, Type *ut)
{
Type *et;
Node *name;
Ucon *uc;
size_t id;
int line;
int synth;
et = NULL;
line = rdint(fd);
id = rdint(fd);
synth = rdbool(fd);
name = unpickle(fd);
uc = mkucon(Zloc, name, ut, et);
uc->loc.line = line;
uc->loc.file = file->file.nfiles - 1;
if (rdbool(fd))
rdtype(fd, &uc->etype);
uc->id = id;
uc->synth = synth;
return uc;
}
/* Writes the name and type of a variable,
* but only writes its intializer for things
* we want to inline cross-file (currently,
* the only cross-file inline is generics) */
static void wrsym(FILE *fd, Node *val)
{
/* sym */
wrint(fd, val->loc.line);
pickle(fd, val->decl.name);
wrtype(fd, val->decl.type);
/* symflags */
wrint(fd, val->decl.vis);
wrbool(fd, val->decl.isconst);
wrbool(fd, val->decl.isgeneric);
wrbool(fd, val->decl.isextern);
wrbool(fd, val->decl.ispkglocal);
wrbool(fd, val->decl.isnoret);
wrbool(fd, val->decl.isexportinit);
if (val->decl.isexportinit) {
pickle(fd, val->decl.init);
}
}
static Node *rdsym(FILE *fd, Trait *ctx)
{
int line;
Node *name;
Node *n;
line = rdint(fd);
name = unpickle(fd);
n = mkdecl(Zloc, name, NULL);
n->loc.line = line;
n->loc.file = file->file.nfiles - 1;
rdtype(fd, &n->decl.type);
if (rdint(fd) == Vishidden)
n->decl.ishidden = 1;
n->decl.trait = ctx;
n->decl.isconst = rdbool(fd);
n->decl.isgeneric = rdbool(fd);
n->decl.isextern = rdbool(fd);
n->decl.ispkglocal = rdbool(fd);
n->decl.isnoret = rdbool(fd);
n->decl.isimport = 1;
n->decl.isexportinit = rdbool(fd);
if (n->decl.isexportinit)
n->decl.init = unpickle(fd);
return n;
}
/* Writes types to a file. Errors on
* internal only types like Tyvar that
* will not be meaningful in another file*/
static void typickle(FILE *fd, Type *ty)
{
size_t i;
if (!ty) {
die("trying to pickle null type\n");
return;
}
wrbyte(fd, ty->type);
wrbyte(fd, ty->vis);
/* tid is generated; don't write */
/* FIXME: since we only support hardcoded traits, we just write
* out the set of them. we should write out the trait list as
* well */
if (!ty->traits) {
wrint(fd, 0);
} else {
wrint(fd, bscount(ty->traits));
for (i = 0; bsiter(ty->traits, &i); i++) {
if (i < Ntraits)
wrint(fd, i | Builtinmask);
else
wrint(fd, i);
}
}
wrint(fd, ty->nsub);
switch (ty->type) {
case Tyunres:
pickle(fd, ty->name);
break;
case Typaram:
wrstr(fd, ty->pname);
break;
case Tystruct:
wrint(fd, ty->nmemb);
for (i = 0; i < ty->nmemb; i++)
pickle(fd, ty->sdecls[i]);
break;
case Tyunion:
wrint(fd, ty->nmemb);
for (i = 0; i < ty->nmemb; i++)
wrucon(fd, ty->udecls[i]);
break;
case Tyarray:
wrtype(fd, ty->sub[0]);
pickle(fd, ty->asize);
break;
case Tyslice:
wrtype(fd, ty->sub[0]);
break;
case Tyvar:
die("Attempting to pickle %s. This will not work.\n", tystr(ty));
break;
case Tyname:
pickle(fd, ty->name);
wrbool(fd, ty->issynth);
wrint(fd, ty->narg);
for (i = 0; i < ty->narg; i++)
wrtype(fd, ty->arg[i]);
wrtype(fd, ty->sub[0]);
break;
case Tygeneric:
pickle(fd, ty->name);
wrbool(fd, ty->issynth);
wrint(fd, ty->ngparam);
for (i = 0; i < ty->ngparam; i++)
wrtype(fd, ty->gparam[i]);
wrtype(fd, ty->sub[0]);
break;
default:
for (i = 0; i < ty->nsub; i++)
wrtype(fd, ty->sub[i]);
break;
}
}
static void traitpickle(FILE *fd, Trait *tr)
{
size_t i;
wrint(fd, tr->uid);
wrbool(fd, tr->ishidden);
pickle(fd, tr->name);
typickle(fd, tr->param);
wrint(fd, tr->nmemb);
for (i = 0; i < tr->nmemb; i++)
wrsym(fd, tr->memb[i]);
wrint(fd, tr->nfuncs);
for (i = 0; i < tr->nfuncs; i++)
wrsym(fd, tr->funcs[i]);
}
static void wrtype(FILE *fd, Type *ty)
{
if (ty->tid >= Builtinmask)
die("Type id %d for %s too big", ty->tid, tystr(ty));
if (ty->vis == Visbuiltin)
wrint(fd, ty->type | Builtinmask);
else
wrint(fd, ty->tid);
}
static void rdtype(FILE *fd, Type **dest)
{
uintptr_t tid;
tid = rdint(fd);
if (tid & Builtinmask) {
*dest = mktype(Zloc, tid & ~Builtinmask);
} else {
lappend(&typefixdest, &ntypefixdest, dest);
lappend(&typefixid, &ntypefixid, itop(tid));
}
}
static void rdtrait(FILE *fd, Trait **dest, Type *ty)
{
uintptr_t tid;
tid = rdint(fd);
if (tid & Builtinmask) {
if (dest)
*dest = traittab[tid & ~Builtinmask];
if (ty)
settrait(ty, traittab[tid & ~Builtinmask]);
} else {
lappend(&traitfixdest, &ntraitfixdest, dest);
lappend(&traitfixtype, &ntraitfixtype, ty);
lappend(&traitfixid, &ntraitfixid, itop(tid));
}
}
/* Writes types to a file. Errors on
* internal only types like Tyvar that
* will not be meaningful in another file */
static Type *tyunpickle(FILE *fd)
{
size_t i, n;
Type *ty;
Ty t;
t = rdbyte(fd);
ty = mktype(Zloc, t);
ty->isimport = 1;
if (rdbyte(fd) == Vishidden)
ty->ishidden = 1;
/* tid is generated; don't write */
n = rdint(fd);
for (i = 0; i < n; i++)
rdtrait(fd, NULL, ty);
ty->nsub = rdint(fd);
if (ty->nsub > 0)
ty->sub = zalloc(ty->nsub * sizeof(Type*));
switch (ty->type) {
case Tyunres:
ty->name = unpickle(fd);
break;
case Typaram:
ty->pname = rdstr(fd);
break;
case Tystruct:
ty->nmemb = rdint(fd);
ty->sdecls = zalloc(ty->nmemb * sizeof(Node*));
for (i = 0; i < ty->nmemb; i++)
ty->sdecls[i] = unpickle(fd);
break;
case Tyunion:
ty->nmemb = rdint(fd);
ty->udecls = zalloc(ty->nmemb * sizeof(Node*));
for (i = 0; i < ty->nmemb; i++)
ty->udecls[i] = rducon(fd, ty);
break;
case Tyarray:
rdtype(fd, &ty->sub[0]);
ty->asize = unpickle(fd);
break;
case Tyslice:
rdtype(fd, &ty->sub[0]);
break;
case Tyname:
ty->name = unpickle(fd);
ty->issynth = rdbool(fd);
ty->narg = rdint(fd);
ty->arg = zalloc(ty->narg * sizeof(Type *));
for (i = 0; i < ty->narg; i++)
rdtype(fd, &ty->arg[i]);
rdtype(fd, &ty->sub[0]);
break;
case Tygeneric:
ty->name = unpickle(fd);
ty->issynth = rdbool(fd);
ty->ngparam = rdint(fd);
ty->gparam = zalloc(ty->ngparam * sizeof(Type *));
for (i = 0; i < ty->ngparam; i++)
rdtype(fd, &ty->gparam[i]);
rdtype(fd, &ty->sub[0]);
break;
default:
for (i = 0; i < ty->nsub; i++)
rdtype(fd, &ty->sub[i]);
break;
}
return ty;
}
Trait *traitunpickle(FILE *fd)
{
Trait *tr;
size_t i, n;
intptr_t uid;
/* create an empty trait */
tr = mktrait(Zloc, NULL, NULL, NULL, 0, NULL, 0, 0);
uid = rdint(fd);
tr->ishidden = rdbool(fd);
tr->name = unpickle(fd);
tr->param = tyunpickle(fd);
n = rdint(fd);
for (i = 0; i < n; i++)
lappend(&tr->memb, &tr->nmemb, rdsym(fd, tr));
n = rdint(fd);
for (i = 0; i < n; i++)
lappend(&tr->funcs, &tr->nfuncs, rdsym(fd, tr));
htput(trmap, itop(uid), tr);
return tr;
}
/* Pickles a node to a file. The format
* is more or less equivalen to to
* simplest serialization of the
* in-memory representation. Minimal
* checking is done, so a bad type can
* crash the compiler */
static void pickle(FILE *fd, Node *n)
{
size_t i;
if (!n) {
wrbyte(fd, Nnone);
return;
}
wrbyte(fd, n->type);
wrint(fd, n->loc.line);
switch (n->type) {
case Nfile:
wrstr(fd, n->file.files[0]);
wrint(fd, n->file.nuses);
for (i = 0; i < n->file.nuses; i++)
pickle(fd, n->file.uses[i]);
wrint(fd, n->file.nstmts);
for (i = 0; i < n->file.nstmts; i++)
pickle(fd, n->file.stmts[i]);
wrstab(fd, n->file.globls);
break;
case Nexpr:
wrbyte(fd, n->expr.op);
wrtype(fd, n->expr.type);
wrbool(fd, n->expr.isconst);
pickle(fd, n->expr.idx);
wrint(fd, n->expr.nargs);
for (i = 0; i < n->expr.nargs; i++)
pickle(fd, n->expr.args[i]);
break;
case Nname:
wrbool(fd, n->name.ns != NULL);
if (n->name.ns) {
wrstr(fd, n->name.ns);
}
wrstr(fd, n->name.name);
break;
case Nuse:
wrbool(fd, n->use.islocal);
wrstr(fd, n->use.name);
break;
case Nlit:
wrbyte(fd, n->lit.littype);
wrtype(fd, n->lit.type);
wrint(fd, n->lit.nelt);
switch (n->lit.littype) {
case Lchr: wrint(fd, n->lit.chrval); break;
case Lint: wrint(fd, n->lit.intval); break;
case Lflt: wrflt(fd, n->lit.fltval); break;
case Lstr: wrlenstr(fd, n->lit.strval); break;
case Llbl: wrstr(fd, n->lit.lblval); break;
case Lbool: wrbool(fd, n->lit.boolval); break;
case Lfunc: pickle(fd, n->lit.fnval); break;
}
break;
case Nloopstmt:
pickle(fd, n->loopstmt.init);
pickle(fd, n->loopstmt.cond);
pickle(fd, n->loopstmt.step);
pickle(fd, n->loopstmt.body);
break;
case Niterstmt:
pickle(fd, n->iterstmt.elt);
pickle(fd, n->iterstmt.seq);
pickle(fd, n->iterstmt.body);
break;
case Nmatchstmt:
pickle(fd, n->matchstmt.val);
wrint(fd, n->matchstmt.nmatches);
for (i = 0; i < n->matchstmt.nmatches; i++)
pickle(fd, n->matchstmt.matches[i]);
break;
case Nmatch:
pickle(fd, n->match.pat);
pickle(fd, n->match.block);
break;
case Nifstmt:
pickle(fd, n->ifstmt.cond);
pickle(fd, n->ifstmt.iftrue);
pickle(fd, n->ifstmt.iffalse);
break;
case Nblock:
wrstab(fd, n->block.scope);
wrint(fd, n->block.nstmts);
for (i = 0; i < n->block.nstmts; i++)
pickle(fd, n->block.stmts[i]);
break;
case Ndecl:
/* sym */
pickle(fd, n->decl.name);
wrtype(fd, n->decl.type);
/* symflags */
wrbool(fd, n->decl.isconst);
wrbool(fd, n->decl.isgeneric);
wrbool(fd, n->decl.isextern);
wrbool(fd, n->decl.isnoret);
wrbool(fd, n->decl.ispkglocal);
/* init */
pickle(fd, n->decl.init);
break;
case Nfunc:
wrtype(fd, n->func.type);
wrstab(fd, n->func.scope);
wrint(fd, n->func.nargs);
for (i = 0; i < n->func.nargs; i++)
pickle(fd, n->func.args[i]);
pickle(fd, n->func.body);
break;
case Nimpl:
pickle(fd, n->impl.traitname);
wrint(fd, n->impl.trait->uid);
wrtype(fd, n->impl.type);
wrint(fd, n->impl.ndecls);
for (i = 0; i < n->impl.ndecls; i++)
wrsym(fd, n->impl.decls[i]);
break;
case Nnone:
die("Nnone should not be seen as node type!");
break;
}
}
/* Unpickles a node from a file. Minimal checking
* is done. Specifically, no checks are done for
* sane arities, a bad file can crash the compiler */
static Node *unpickle(FILE *fd)
{
size_t i;
Ntype type;
Node *n;
type = rdbyte(fd);
if (type == Nnone)
return NULL;
n = mknode(Zloc, type);
n->loc.line = rdint(fd);
n->loc.file = file->file.nfiles - 1;
switch (n->type) {
case Nfile:
lappend(&n->file.files, &n->file.nfiles, rdstr(fd));
n->file.nuses = rdint(fd);
n->file.uses = zalloc(sizeof(Node*)*n->file.nuses);
for (i = 0; i < n->file.nuses; i++)
n->file.uses[i] = unpickle(fd);
n->file.nstmts = rdint(fd);
n->file.stmts = zalloc(sizeof(Node*)*n->file.nstmts);
for (i = 0; i < n->file.nstmts; i++)
n->file.stmts[i] = unpickle(fd);
n->file.globls = rdstab(fd);
break;
case Nexpr:
n->expr.op = rdbyte(fd);
rdtype(fd, &n->expr.type);
n->expr.isconst = rdbool(fd);
n->expr.idx = unpickle(fd);
n->expr.nargs = rdint(fd);
n->expr.args = zalloc(sizeof(Node *)*n->expr.nargs);
for (i = 0; i < n->expr.nargs; i++)
n->expr.args[i] = unpickle(fd);
break;
case Nname:
if (rdbool(fd))
n->name.ns = rdstr(fd);
n->name.name = rdstr(fd);
break;
case Nuse:
n->use.islocal = rdbool(fd);
n->use.name = rdstr(fd);
break;
case Nlit:
n->lit.littype = rdbyte(fd);
rdtype(fd, &n->lit.type);
n->lit.nelt = rdint(fd);
switch (n->lit.littype) {
case Lchr: n->lit.chrval = rdint(fd); break;
case Lint: n->lit.intval = rdint(fd); break;
case Lflt: n->lit.fltval = rdflt(fd); break;
case Lstr: rdlenstr(fd, &n->lit.strval); break;
case Llbl: n->lit.lblval = rdstr(fd); break;
case Lbool: n->lit.boolval = rdbool(fd); break;
case Lfunc: n->lit.fnval = unpickle(fd); break;
}
break;
case Nloopstmt:
n->loopstmt.init = unpickle(fd);
n->loopstmt.cond = unpickle(fd);
n->loopstmt.step = unpickle(fd);
n->loopstmt.body = unpickle(fd);
break;
case Niterstmt:
n->iterstmt.elt = unpickle(fd);
n->iterstmt.seq = unpickle(fd);
n->iterstmt.body = unpickle(fd);
break;
case Nmatchstmt:
n->matchstmt.val = unpickle(fd);
n->matchstmt.nmatches = rdint(fd);
n->matchstmt.matches = zalloc(sizeof(Node *)*n->matchstmt.nmatches);
for (i = 0; i < n->matchstmt.nmatches; i++)
n->matchstmt.matches[i] = unpickle(fd);
break;
case Nmatch:
n->match.pat = unpickle(fd);
n->match.block = unpickle(fd);
break;
case Nifstmt:
n->ifstmt.cond = unpickle(fd);
n->ifstmt.iftrue = unpickle(fd);
n->ifstmt.iffalse = unpickle(fd);
break;
case Nblock:
n->block.scope = rdstab(fd);
n->block.nstmts = rdint(fd);
n->block.stmts = zalloc(sizeof(Node *)*n->block.nstmts);
n->block.scope->super = curstab();
pushstab(n->func.scope->super);
for (i = 0; i < n->block.nstmts; i++)
n->block.stmts[i] = unpickle(fd);
popstab();
break;
case Ndecl:
n->decl.did = ndecls; /* unique within file */
/* sym */
n->decl.name = unpickle(fd);
rdtype(fd, &n->decl.type);
/* symflags */
n->decl.isconst = rdbool(fd);
n->decl.isgeneric = rdbool(fd);
n->decl.isextern = rdbool(fd);
n->decl.isnoret = rdbool(fd);
n->decl.ispkglocal = rdbool(fd);
/* init */
n->decl.init = unpickle(fd);
lappend(&decls, &ndecls, n);
break;
case Nfunc:
rdtype(fd, &n->func.type);
n->func.scope = rdstab(fd);
n->func.nargs = rdint(fd);
n->func.args = zalloc(sizeof(Node *)*n->func.nargs);
n->func.scope->super = curstab();
pushstab(n->func.scope->super);
for (i = 0; i < n->func.nargs; i++)
n->func.args[i] = unpickle(fd);
n->func.body = unpickle(fd);
popstab();
break;
case Nimpl:
n->impl.traitname = unpickle(fd);
i = rdint(fd);
rdtrait(fd, &n->impl.trait, NULL);
rdtype(fd, &n->impl.type);
n->impl.ndecls = rdint(fd);
n->impl.decls = zalloc(sizeof(Node *)*n->impl.ndecls);
for (i = 0; i < n->impl.ndecls; i++)
n->impl.decls[i] = rdsym(fd, n->impl.trait);
break;
case Nnone:
die("Nnone should not be seen as node type!");
break;
}
return n;
}
static Stab *findstab(Stab *st, char *pkg)
{
Stab *s;
if (!pkg) {
if (!st->name)
return st;
else
return NULL;
}
s = getns_str(st, pkg);
if (!s) {
s = mkstab();
s->name = strdup(pkg);
putns(st, s);
}
return s;
}
static int isspecialization(Type *t1, Type *t2)
{
if ((t1->type != Tygeneric || t2->type != Tyname) &&
(t1->type != Tyname || t2->type != Tygeneric) &&
(t1->type != Tyname || t2->type != Tyname))
return 0;
/* FIXME: this should be done better */
return nameeq(t1->name, t2->name);
}
static void fixtypemappings(Stab *st)
{
size_t i;
Type *t, *old;
/*
* merge duplicate definitions.
* This allows us to compare named types by id, instead
* of doing a deep walk through the type. This ability is
* depended on when we do type inference.
*/
for (i = 0; i < ntypefixdest; i++) {
t = htget(tidmap, itop(typefixid[i]));
if (!t)
die("Unable to find type for id %zd\n", typefixid[i]);
if ((t->type == Tyname || t->type == Tygeneric) && !t->issynth) {
t = htget(tydedup, t);
}
*typefixdest[i] = t;
}
/* check for duplicate type definitions */
for (i = 0; i < ntypefixdest; i++) {
t = htget(tidmap, itop(typefixid[i]));
if ((t->type != Tyname && t->type != Tygeneric) || t->issynth)
continue;
old = htget(tydedup, t);
if (old && !tyeq(t, old) && !isspecialization(t, old))
lfatal(t->loc, "Duplicate definition of type %s on %s:%d", tystr(old), file->file.files[old->loc.file], old->loc.line);
}
lfree(&typefixdest, &ntypefixdest);
lfree(&typefixid, &ntypefixid);
}
static void fixtraitmappings(Stab *st)
{
size_t i;
Trait *t;
/*
* merge duplicate definitions.
* This allows us to compare named types by id, instead
* of doing a deep walk through the type. This ability is
* depended on when we do type inference.
*/
for (i = 0; i < ntraitfixdest; i++) {
t = htget(trmap, itop(traitfixid[i]));
if (!t)
die("Unable to find trait for id %zd\n", traitfixid[i]);
if (traitfixdest[i])
*traitfixdest[i] = t;
if (traitfixtype[i])
settrait(traitfixtype[i], t);
}
lfree(&traitfixdest, &ntraitfixdest);
lfree(&traitfixid, &ntraitfixid);
}
ulong tdhash(void *pt)
{
Type *t;
t = pt;
return t->type * namehash(t->name);
}
int tdeq(void *pa, void *pb)
{
Type *a, *b;
a = pa;
b = pb;
return a->type == b->type && nameeq(a->name, b->name);
}
/* Usefile format:
* U<pkgname>
* T<pickled-type>
* R<picled-trait>
* I<pickled-impl>
* D<picled-decl>
* G<pickled-decl><pickled-initializer>
*/
int loaduse(char *path, FILE *f, Stab *st, Vis vis)
{
intptr_t tid;
size_t i;
char *pkg;
Node *dcl, *impl;
Stab *s;
Type *ty;
Trait *tr;
char *lib;
int c;
pushstab(file->file.globls);
if (!tydedup)
tydedup = mkht(tdhash, tdeq);
if (fgetc(f) != 'U')
return 0;
if (rdint(f) != Abiversion) {
fprintf(stderr, "abi version mismatch\n");
return 0;
}
pkg = rdstr(f);
/* if the package names match up, or the usefile has no declared
* package, then we simply add to the current stab. Otherwise,
* we add a new stab under the current one */
if (st->name) {
if (pkg && !strcmp(pkg, st->name)) {
s = st;
} else {
s = findstab(st, pkg);
}
} else {
if (pkg) {
s = findstab(st, pkg);
} else {
s = st;
}
}
if (!streq(st->name, pkg))
vis = Visintern;
if (!s) {
printf("could not find matching package for merge: %s in %s\n", st->name, path);
exit(1);
}
tidmap = mkht(ptrhash, ptreq);
trmap = mkht(ptrhash, ptreq);
/* builtin traits */
for (i = 0; i < Ntraits; i++)
htput(trmap, itop(i), traittab[i]);
while ((c = fgetc(f)) != EOF) {
switch(c) {
case 'L':
lib = rdstr(f);
for (i = 0; i < file->file.nlibdeps; i++)
if (!strcmp(file->file.libdeps[i], lib))
/* break out of both loop and switch */
goto foundlib;
lappend(&file->file.libdeps, &file->file.nlibdeps, lib);
foundlib:
break;
case 'F':
lappend(&file->file.files, &file->file.nfiles, rdstr(f));
break;
case 'G':
case 'D':
dcl = rdsym(f, NULL);
dcl->decl.vis = vis;
putdcl(s, dcl);
break;
case 'R':
tr = traitunpickle(f);
tr->vis = vis;
puttrait(s, tr->name, tr);
for (i = 0; i < tr->nfuncs; i++)
putdcl(s, tr->funcs[i]);
break;
case 'T':
tid = rdint(f);
ty = tyunpickle(f);
if(!ty->ishidden)
ty->vis = vis;
htput(tidmap, itop(tid), ty);
/* fix up types */
if (ty->type == Tyname || ty->type == Tygeneric) {
if (ty->issynth)
break;
if (!streq(s->name, ty->name->name.ns))
ty->ishidden = 1;
if (!gettype(s, ty->name) && !ty->ishidden)
puttype(s, ty->name, ty);
if (!hthas(tydedup, ty))
htput(tydedup, ty, ty);
} else if (ty->type == Tyunion) {
for (i = 0; i < ty->nmemb; i++)
if (!getucon(s, ty->udecls[i]->name) && !ty->udecls[i]->synth)
putucon(s, ty->udecls[i]);
}
break;
case 'I':
impl = unpickle(f);
putimpl(s, impl);
/* specialized declarations always go into the global stab */
for (i = 0; i < impl->impl.ndecls; i++)
putdcl(file->file.globls, impl->impl.decls[i]);
break;
case EOF:
break;
}
}
fixtypemappings(s);
fixtraitmappings(s);
htfree(tidmap);
popstab();
return 1;
}
void readuse(Node *use, Stab *st, Vis vis)
{
size_t i;
FILE *fd;
char *t, *p;
/* local (quoted) uses are always relative to the cwd */
fd = NULL;
if (use->use.islocal) {
p = strdup(use->use.name);
fd = fopen(p, "r");
/* nonlocal (barename) uses are always searched on the include path */
} else {
for (i = 0; i < nincpaths; i++) {
t = strjoin(incpaths[i], "/");
p = strjoin(t, use->use.name);
fd = fopen(p, "r");
if (fd) {
free(t);
break;
}
}
}
if (!fd)
fatal(use, "Could not open %s", use->use.name);
if (!loaduse(p, fd, st, vis))
die("Could not load usefile %s from %s", use->use.name, p);
free(p);
}
/* Usefile format:
* U<pkgname>
* L<liblist>
* I<initlist>
* T<pickled-type>
* D<picled-decl>
* G<pickled-decl><pickled-initializer>
* Z
*/
void writeuse(FILE *f, Node *file)
{
Stab *st;
void **k;
Node *s, *u;
size_t i, n;
assert(file->type == Nfile);
st = file->file.globls;
/* usefile name */
wrbyte(f, 'U');
wrint(f, Abiversion); /* use version */
if (st->name)
wrstr(f, st->name);
else
wrstr(f, NULL);
/* library deps */
for (i = 0; i < file->file.nuses; i++) {
u = file->file.uses[i];
if (!u->use.islocal) {
wrbyte(f, 'L');
wrstr(f, u->use.name);
}
}
for (i = 0; i < file->file.nlibdeps; i++) {
wrbyte(f, 'L');
wrstr(f, file->file.libdeps[i]);
}
/* source file name */
wrbyte(f, 'F');
wrstr(f, file->file.files[0]);
for (i = 0; i < ntypes; i++) {
if (types[i]->vis == Visexport || types[i]->vis == Vishidden) {
wrbyte(f, 'T');
wrint(f, types[i]->tid);
typickle(f, types[i]);
}
}
for (i = 0; i < ntraittab; i++) {
if (traittab[i]->vis == Visexport || traittab[i]->vis == Vishidden) {
wrbyte(f, 'R');
traitpickle(f, traittab[i]);
}
}
k = htkeys(st->impl, &n);
for (i = 0; i < n; i++) {
/* merging during inference should remove all protos */
s = getimpl(st, k[i]);
assert(!s->impl.isproto);
if (s->impl.vis == Visexport || s->impl.vis == Vishidden) {
wrbyte(f, 'I');
pickle(f, s);
}
}
free(k);
k = htkeys(st->dcl, &n);
for (i = 0; i < n; i++) {
s = getdcl(st, k[i]);
assert(s != NULL);
if (s->decl.vis == Visintern || s->decl.vis == Visbuiltin)
continue;
/* trait functions get written out with their traits */
if (s->decl.trait)
continue;
if (s->decl.isgeneric)
wrbyte(f, 'G');
else
wrbyte(f, 'D');
wrsym(f, s);
}
free(k);
}