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#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "util.h"
#include "cc.h"
struct scope filescope;
void
scopeinit(void)
{
static struct builtin {
char *name;
struct decl decl;
} builtins[] = {
{"__builtin_alloca", {.kind = DECLBUILTIN, .u.builtin = BUILTINALLOCA}},
{"__builtin_constant_p", {.kind = DECLBUILTIN, .u.builtin = BUILTINCONSTANTP}},
{"__builtin_expect", {.kind = DECLBUILTIN, .u.builtin = BUILTINEXPECT}},
{"__builtin_inff", {.kind = DECLBUILTIN, .u.builtin = BUILTININFF}},
{"__builtin_nanf", {.kind = DECLBUILTIN, .u.builtin = BUILTINNANF}},
{"__builtin_offsetof", {.kind = DECLBUILTIN, .u.builtin = BUILTINOFFSETOF}},
{"__builtin_types_compatible_p",
{.kind = DECLBUILTIN, .u.builtin = BUILTINTYPESCOMPATIBLEP}},
{"__builtin_unreachable", {.kind = DECLBUILTIN, .u.builtin = BUILTINUNREACHABLE}},
{"__builtin_va_arg", {.kind = DECLBUILTIN, .u.builtin = BUILTINVAARG}},
{"__builtin_va_copy", {.kind = DECLBUILTIN, .u.builtin = BUILTINVACOPY}},
{"__builtin_va_end", {.kind = DECLBUILTIN, .u.builtin = BUILTINVAEND}},
{"__builtin_va_start", {.kind = DECLBUILTIN, .u.builtin = BUILTINVASTART}},
};
static struct decl valist;
struct builtin *b;
for (b = builtins; b < builtins + LEN(builtins); ++b)
scopeputdecl(&filescope, b->name, &b->decl);
valist.kind = DECLTYPE;
valist.type = targ->typevalist;
scopeputdecl(&filescope, "__builtin_va_list", &valist);
}
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)
delmap(s->decls, NULL);
if (s->tags)
delmap(s->tags, NULL);
free(s);
return parent;
}
struct decl *
scopegetdecl(struct scope *s, const char *name, bool recurse)
{
struct decl *d;
struct mapkey k;
mapkey(&k, name, strlen(name));
do {
d = s->decls ? mapget(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 mapkey k;
mapkey(&k, name, strlen(name));
do {
t = s->tags ? mapget(s->tags, &k) : NULL;
s = s->parent;
} while (!t && s && recurse);
return t;
}
void
scopeputdecl(struct scope *s, const char *name, struct decl *d)
{
struct mapkey k;
if (!s->decls)
s->decls = mkmap(32);
mapkey(&k, name, strlen(name));
*mapput(s->decls, &k) = d;
}
void
scopeputtag(struct scope *s, const char *name, struct type *t)
{
struct mapkey k;
if (!s->tags)
s->tags = mkmap(32);
mapkey(&k, name, strlen(name));
*mapput(s->tags, &k) = t;
}
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