#include "config.h"
#include "system.h"
#include "ggc.h"
#include "tree.h"
#include "hashtable.h"
#include "cpplib.h"
const char empty_string[] = "";
const char digit_vector[] = {
'0', 0, '1', 0, '2', 0, '3', 0, '4', 0,
'5', 0, '6', 0, '7', 0, '8', 0, '9', 0
};
struct ht *ident_hash;
static struct obstack string_stack;
static hashnode alloc_node PARAMS ((hash_table *));
static int mark_ident PARAMS ((struct cpp_reader *, hashnode, const PTR));
static int ht_copy_and_clear PARAMS ((cpp_reader *, hashnode, const void *));
void
init_stringpool ()
{
ident_hash = ht_create (14);
ident_hash->alloc_node = alloc_node;
gcc_obstack_init (&string_stack);
}
static hashnode
alloc_node (table)
hash_table *table ATTRIBUTE_UNUSED;
{
return GCC_IDENT_TO_HT_IDENT (make_node (IDENTIFIER_NODE));
}
const char *
ggc_alloc_string (contents, length)
const char *contents;
int length;
{
if (length == -1)
length = strlen (contents);
if (length == 0)
return empty_string;
if (length == 1 && ISDIGIT (contents[0]))
return digit_string (contents[0] - '0');
obstack_grow0 (&string_stack, contents, length);
return obstack_finish (&string_stack);
}
tree
get_identifier (text)
const char *text;
{
hashnode ht_node = ht_lookup (ident_hash,
(const unsigned char *) text,
strlen (text), HT_ALLOC);
return HT_IDENT_TO_GCC_IDENT (ht_node);
}
tree
get_identifier_with_length (text, length)
const char *text;
unsigned int length;
{
hashnode ht_node = ht_lookup (ident_hash,
(const unsigned char *) text,
length, HT_ALLOC);
return HT_IDENT_TO_GCC_IDENT (ht_node);
}
tree
maybe_get_identifier (text)
const char *text;
{
hashnode ht_node;
ht_node = ht_lookup (ident_hash, (const unsigned char *) text,
strlen (text), HT_NO_INSERT);
if (ht_node)
return HT_IDENT_TO_GCC_IDENT (ht_node);
return NULL_TREE;
}
void
stringpool_statistics ()
{
ht_dump_statistics (ident_hash);
}
static int
mark_ident (pfile, h, v)
struct cpp_reader *pfile ATTRIBUTE_UNUSED;
hashnode h;
const PTR v ATTRIBUTE_UNUSED;
{
gt_ggc_m_9tree_node (HT_IDENT_TO_GCC_IDENT (h));
return 1;
}
void
ggc_mark_stringpool ()
{
ht_forall (ident_hash, mark_ident, NULL);
}
void
gt_ggc_m_S (x)
void *x ATTRIBUTE_UNUSED;
{
}
void
gt_pch_p_S (obj, x, op, cookie)
void *obj ATTRIBUTE_UNUSED;
void *x ATTRIBUTE_UNUSED;
gt_pointer_operator op ATTRIBUTE_UNUSED;
void *cookie ATTRIBUTE_UNUSED;
{
}
void
gt_pch_n_S (x)
const void *x;
{
gt_pch_note_object ((void *)x, (void *)x, >_pch_p_S);
}
struct string_pool_data GTY(())
{
tree * GTY((length ("%h.nslots"))) entries;
unsigned int nslots;
unsigned int nelements;
};
static GTY(()) struct string_pool_data * spd;
static int
ht_copy_and_clear (r, hp, ht2_p)
cpp_reader *r ATTRIBUTE_UNUSED;
hashnode hp;
const void *ht2_p;
{
struct cpp_hashnode *h = CPP_HASHNODE (hp);
struct ht *ht2 = (struct ht *) ht2_p;
if (h->type != NT_VOID
&& (h->flags & NODE_BUILTIN) == 0)
{
cpp_hashnode *h2 = CPP_HASHNODE (ht_lookup (ht2,
NODE_NAME (h),
NODE_LEN (h),
HT_ALLOC));
h2->type = h->type;
memcpy (&h2->value, &h->value, sizeof (h->value));
h->type = NT_VOID;
memset (&h->value, 0, sizeof (h->value));
}
return 1;
}
struct ht *saved_ident_hash;
void
gt_pch_save_stringpool ()
{
unsigned int i;
spd = ggc_alloc (sizeof (*spd));
spd->nslots = ident_hash->nslots;
spd->nelements = ident_hash->nelements;
spd->entries = ggc_alloc (sizeof (tree *) * spd->nslots);
for (i = 0; i < spd->nslots; i++)
if (ident_hash->entries[i] != NULL)
spd->entries[i] = HT_IDENT_TO_GCC_IDENT (ident_hash->entries[i]);
else
spd->entries[i] = NULL;
saved_ident_hash = ht_create (14);
saved_ident_hash->alloc_node = alloc_node;
ht_forall (ident_hash, ht_copy_and_clear, saved_ident_hash);
}
void
gt_pch_fixup_stringpool ()
{
ht_forall (saved_ident_hash, ht_copy_and_clear, ident_hash);
ht_destroy (saved_ident_hash);
saved_ident_hash = 0;
}
void
gt_pch_restore_stringpool ()
{
unsigned int i;
ident_hash->nslots = spd->nslots;
ident_hash->nelements = spd->nelements;
ident_hash->entries = xrealloc (ident_hash->entries,
sizeof (hashnode) * spd->nslots);
for (i = 0; i < spd->nslots; i++)
if (spd->entries[i] != NULL)
ident_hash->entries[i] = GCC_IDENT_TO_HT_IDENT (spd->entries[i]);
else
ident_hash->entries[i] = NULL;
spd = NULL;
}
#include "gt-stringpool.h"