ref: 6a921aa5b2045b172370c1677c1e3f75b8c3cfc4
dir: /parse/node.c/
#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <stdarg.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"
Node **nodes;
size_t nnodes;
Node **decls;
size_t ndecls;
char *fname(Srcloc l)
{
return file->file.files[l.file];
}
int lnum(Srcloc l)
{
return l.line;
}
/*
* Bah, this is going to need to know how to fold things.
* FIXME: teach it.
*/
uint64_t arraysz(Node *sz)
{
Node *n;
n = sz;
if (exprop(n) != Olit)
fatal(sz, "too many layers of indirection when finding intializer. (initialization loop?)");
n = n->expr.args[0];
if (n->lit.littype != Lint)
fatal(sz, "initializer is not an integer");
return n->lit.intval;
}
Node *mknode(Srcloc loc, Ntype nt)
{
Node *n;
n = zalloc(sizeof(Node));
n->nid = nnodes;
n->type = nt;
n->loc = loc;
lappend(&nodes, &nnodes, n);
return n;
}
Node *mkfile(char *name)
{
Node *n;
n = mknode(Zloc, Nfile);
n->file.ns = mkht(strhash, streq);
lappend(&n->file.files, &n->file.nfiles, strdup(name));
return n;
}
Node *mkuse(Srcloc loc, char *use, int islocal)
{
Node *n;
n = mknode(loc, Nuse);
n->use.name = strdup(use);
n->use.islocal = islocal;
return n;
}
Node *mksliceexpr(Srcloc loc, Node *sl, Node *base, Node *off)
{
if (!base)
base = mkintlit(loc, 0);
if (!off)
off = mkexpr(loc, Omemb, sl, mkname(loc, "len"), NULL);
return mkexpr(loc, Oslice, sl, base, off, NULL);
}
Node *mkexprl(Srcloc loc, Op op, Node **args, size_t nargs)
{
Node *n;
n = mknode(loc, Nexpr);
n->expr.op = op;
n->expr.args = args;
n->expr.nargs = nargs;
return n;
}
Node *mkexpr(Srcloc loc, Op op, ...)
{
Node *n;
va_list ap;
Node *arg;
n = mknode(loc, Nexpr);
n->expr.op = op;
va_start(ap, op);
while ((arg = va_arg(ap, Node*)) != NULL)
lappend(&n->expr.args, &n->expr.nargs, arg);
va_end(ap);
return n;
}
Node *mkcall(Srcloc loc, Node *fn, Node **args, size_t nargs)
{
Node *n;
size_t i;
n = mkexpr(loc, Ocall, fn, NULL);
for (i = 0; i < nargs; i++)
lappend(&n->expr.args, &n->expr.nargs, args[i]);
return n;
}
Node *mkifstmt(Srcloc loc, Node *cond, Node *iftrue, Node *iffalse)
{
Node *n;
n = mknode(loc, Nifstmt);
n->ifstmt.cond = cond;
n->ifstmt.iftrue = iftrue;
n->ifstmt.iffalse = iffalse;
return n;
}
Node *mkloopstmt(Srcloc loc, Node *init, Node *cond, Node *incr, Node *body)
{
Node *n;
n = mknode(loc, Nloopstmt);
n->loopstmt.init = init;
n->loopstmt.cond = cond;
n->loopstmt.step = incr;
n->loopstmt.body = body;
return n;
}
Node *mkiterstmt(Srcloc loc, Node *elt, Node *seq, Node *body)
{
Node *n;
n = mknode(loc, Niterstmt);
n->iterstmt.elt = elt;
n->iterstmt.seq = seq;
n->iterstmt.body = body;
return n;
}
Node *mkmatchstmt(Srcloc loc, Node *val, Node **matches, size_t nmatches)
{
Node *n;
n = mknode(loc, Nmatchstmt);
n->matchstmt.val = val;
n->matchstmt.matches = matches;
n->matchstmt.nmatches = nmatches;
return n;
}
Node *mkmatch(Srcloc loc, Node *pat, Node *body)
{
Node *n;
n = mknode(loc, Nmatch);
n->match.pat = pat;
n->match.block = body;
return n;
}
Node *mkfunc(Srcloc loc, Node **args, size_t nargs, Type *ret, Node *body)
{
Node *n;
Node *f;
size_t i;
f = mknode(loc, Nfunc);
f->func.args = args;
f->func.nargs = nargs;
f->func.body = body;
f->func.scope = mkstab();
f->func.type = mktyfunc(loc, args, nargs, ret);
for (i = 0; i < nargs; i++)
putdcl(f->func.scope, args[i]);
n = mknode(loc, Nlit);
n->lit.littype = Lfunc;
n->lit.fnval = f;
return n;
}
Node *mkblock(Srcloc loc, Stab *scope)
{
Node *n;
n = mknode(loc, Nblock);
n->block.scope = scope;
return n;
}
Node *mkimplstmt(Srcloc loc, Node *name, Type *t, Node **decls, size_t ndecls)
{
Node *n;
n = mknode(loc, Nimpl);
n->impl.traitname = name;
n->impl.type = t;
n->impl.decls = decls;
n->impl.ndecls = ndecls;
return n;
}
Node *mkintlit(Srcloc loc, uvlong val)
{
return mkexpr(loc, Olit, mkint(loc, val), NULL);
}
Node *mklbl(Srcloc loc, char *lbl)
{
Node *n;
assert(lbl != NULL);
n = mknode(loc, Nlit);
n->lit.littype = Llbl;
n->lit.lblval = strdup(lbl);
return mkexpr(loc, Olit, n, NULL);
}
Node *mkstr(Srcloc loc, Str val)
{
Node *n;
n = mknode(loc, Nlit);
n->lit.littype = Lstr;
n->lit.strval.len = val.len;
n->lit.strval.buf = malloc(val.len);
memcpy(n->lit.strval.buf, val.buf, val.len);
return n;
}
Node *mkint(Srcloc loc, uint64_t val)
{
Node *n;
n = mknode(loc, Nlit);
n->lit.littype = Lint;
n->lit.intval = val;
return n;
}
Node *mkchar(Srcloc loc, uint32_t val)
{
Node *n;
n = mknode(loc, Nlit);
n->lit.littype = Lchr;
n->lit.chrval = val;
return n;
}
Node *mkfloat(Srcloc loc, double val)
{
Node *n;
n = mknode(loc, Nlit);
n->lit.littype = Lflt;
n->lit.fltval = val;
return n;
}
Node *mkidxinit(Srcloc loc, Node *idx, Node *init)
{
init->expr.idx = idx;
return init;
}
Node *mkname(Srcloc loc, char *name)
{
Node *n;
n = mknode(loc, Nname);
n->name.name = strdup(name);
return n;
}
Node *mknsname(Srcloc loc, char *ns, char *name)
{
Node *n;
n = mknode(loc, Nname);
n->name.ns = strdup(ns);
n->name.name = strdup(name);
return n;
}
Node *mkdecl(Srcloc loc, Node *name, Type *ty)
{
Node *n;
n = mknode(loc, Ndecl);
n->decl.did = ndecls;
n->decl.name = name;
n->decl.type = ty;
lappend(&decls, &ndecls, n);
return n;
}
Ucon *mkucon(Srcloc loc, Node *name, Type *ut, Type *et)
{
Ucon *uc;
uc = zalloc(sizeof(Ucon));
uc->loc = loc;
uc->name = name;
uc->utype = ut;
uc->etype = et;
return uc;
}
Node *mkbool(Srcloc loc, int val)
{
Node *n;
n = mknode(loc, Nlit);
n->lit.littype = Lbool;
n->lit.boolval = val;
return n;
}
char *declname(Node *n)
{
Node *name;
assert(n->type == Ndecl);
name = n->decl.name;
return name->name.name;
}
Type *decltype(Node *n)
{
assert(n->type == Ndecl);
return nodetype(n);
}
Type *exprtype(Node *n)
{
assert(n->type == Nexpr);
return nodetype(n);
}
Type *nodetype(Node *n)
{
switch (n->type) {
case Ndecl: return n->decl.type; break;
case Nexpr: return n->expr.type; break;
case Nlit: return n->lit.type; break;
default: die("Node %s has no type", nodestr[n->type]); break;
}
return NULL;
}
int liteq(Node *a, Node *b)
{
assert(a->type == Nlit && b->type == Nlit);
if (a->lit.littype != b->lit.littype)
return 0;
if (!tyeq(a->lit.type, b->lit.type))
return 0;
switch (a->lit.littype) {
case Lchr:
return a->lit.chrval == b->lit.chrval;
case Lbool:
return a->lit.boolval == b->lit.boolval;
case Lint:
return a->lit.intval == b->lit.intval;
case Lflt:
return a->lit.fltval == b->lit.fltval;
case Lstr:
return a->lit.strval.len == b->lit.strval.len &&
!memcmp(a->lit.strval.buf, b->lit.strval.buf, a->lit.strval.len);
case Lfunc:
return a->lit.fnval == b->lit.fnval;
case Llbl:
return !strcmp(a->lit.lblval, b->lit.lblval);
break;
}
return 0;
}
/* name hashing */
ulong namehash(void *p)
{
Node *n;
n = p;
return strhash(namestr(n)) ^ strhash(n->name.ns);
}
int nameeq(void *p1, void *p2)
{
Node *a, *b;
a = p1;
b = p2;
if (a == b)
return 1;
return streq(namestr(a), namestr(b)) && streq(a->name.ns, b->name.ns);
}
void setns(Node *n, char *ns)
{
assert(!n->name.ns || !strcmp(n->name.ns, ns));
n->name.ns = strdup(ns);
}
Op exprop(Node *e)
{
assert(e->type == Nexpr);
return e->expr.op;
}
char *namestr(Node *name)
{
if (!name)
return "";
assert(name->type == Nname);
return name->name.name;
}
static size_t did(Node *n)
{
if (n->type == Ndecl) {
return n->decl.did;
} else if (n->type == Nexpr) {
assert(exprop(n) == Ovar);
return n->expr.did;
}
dump(n, stderr);
die("Can't get did");
return 0;
}
/* Hashes a Ovar expr or an Ndecl */
ulong varhash(void *dcl)
{
/* large-prime hash. meh. */
return did(dcl) * 366787;
}
/* Checks if the did of two vars are equal */
int vareq(void *a, void *b)
{
return did(a) == did(b);
}