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#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "util.h"
#include "htab.h"
#include "scope.h"
struct scope filescope;
struct scope *
mkscope(struct scope *parent)
{
struct scope *s;
s = xmalloc(sizeof(*s));
s->decls = NULL;
s->tags = NULL;
s->breaklabel = parent->breaklabel;
s->continuelabel = parent->continuelabel;
s->switchcases = parent->switchcases;
s->parent = parent;
return s;
}
struct scope *
delscope(struct scope *s)
{
struct scope *parent = s->parent;
if (s->decls)
delhtab(s->decls, NULL);
if (s->tags)
delhtab(s->tags, NULL);
free(s);
return parent;
}
struct declaration *
scopegetdecl(struct scope *s, const char *name, bool recurse)
{
struct declaration *d;
struct hashtablekey k;
htabstrkey(&k, name);
do {
d = s->decls ? htabget(s->decls, &k) : NULL;
s = s->parent;
} while (!d && s && recurse);
return d;
}
struct type *
scopegettag(struct scope *s, const char *name, bool recurse)
{
struct type *t;
struct hashtablekey k;
htabstrkey(&k, name);
do {
t = s->tags ? htabget(s->tags, &k) : NULL;
s = s->parent;
} while (!t && s && recurse);
return t;
}
void
scopeputdecl(struct scope *s, const char *name, struct declaration *d)
{
struct hashtablekey k;
if (!s->decls)
s->decls = mkhtab(32);
htabstrkey(&k, name);
*htabput(s->decls, &k) = d;
}
void
scopeputtag(struct scope *s, const char *name, struct type *t)
{
struct hashtablekey k;
if (!s->tags)
s->tags = mkhtab(32);
htabstrkey(&k, name);
*htabput(s->tags, &k) = t;
}
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