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quakeforge/libs/ruamoko/rua_hash.c
Bill Currie e7ac637687 [ruamoko] Wrap hash table callbacks with push/pop frame 
Builtins that call progs with parameters now must always wrap the call
to PR_ExecuteProgram so that the data stack is properly preserved across
the call.

I need to do an audit of all the calls to PR_ExecuteProgram.
2022-01-31 23:47:02 +09:00

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/*
bi_hash.c
QuakeC hash table api
Copyright (C) 2003 Bill Currie
Author: Bill Currie <bill@taniwha.org>
Date: 2003/4/7
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdlib.h>
#include "QF/hash.h"
#include "QF/progs.h"
#include "rua_internal.h"
typedef struct bi_hashtab_s {
struct bi_hashtab_s *next;
struct bi_hashtab_s **prev;
progs_t *pr;
hashtab_t *tab;
pr_func_t gk;
pr_func_t gh;
pr_func_t cmp;
pr_func_t f;
pr_ptr_t ud;
} bi_hashtab_t;
typedef struct {
PR_RESMAP (bi_hashtab_t) table_map;
bi_hashtab_t *tabs;
} hash_resources_t;
static bi_hashtab_t *
table_new (hash_resources_t *res)
{
return PR_RESNEW (res->table_map);
}
static void
table_free (hash_resources_t *res, bi_hashtab_t *table)
{
PR_RESFREE (res->table_map, table);
}
static void
table_reset (hash_resources_t *res)
{
PR_RESRESET (res->table_map);
}
static inline bi_hashtab_t *
table_get (hash_resources_t *res, int index)
{
return PR_RESGET(res->table_map, index);
}
static inline int __attribute__((pure))
table_index (hash_resources_t *res, bi_hashtab_t *table)
{
return PR_RESINDEX(res->table_map, table);
}
static const char *
bi_get_key (const void *key, void *_ht)
{
bi_hashtab_t *ht = (bi_hashtab_t *)_ht;
PR_PushFrame (ht->pr);
PR_RESET_PARAMS (ht->pr);
P_INT (ht->pr, 0) = (intptr_t) (key);
P_INT (ht->pr, 1) = ht->ud;
ht->pr->pr_argc = 2;
PR_ExecuteProgram (ht->pr, ht->gk);
pr_string_t string = R_STRING (ht->pr);
PR_PopFrame (ht->pr);
return PR_GetString (ht->pr, string);
}
static uintptr_t
bi_get_hash (const void *key, void *_ht)
{
bi_hashtab_t *ht = (bi_hashtab_t *)_ht;
PR_PushFrame (ht->pr);
PR_RESET_PARAMS (ht->pr);
P_INT (ht->pr, 0) = (intptr_t) (key);
P_INT (ht->pr, 1) = ht->ud;
ht->pr->pr_argc = 2;
PR_ExecuteProgram (ht->pr, ht->gh);
int hash = R_INT (ht->pr);
PR_PopFrame (ht->pr);
return hash;
}
static int
bi_compare (const void *key1, const void *key2, void *_ht)
{
bi_hashtab_t *ht = (bi_hashtab_t *)_ht;
PR_PushFrame (ht->pr);
PR_RESET_PARAMS (ht->pr);
P_INT (ht->pr, 0) = (intptr_t) (key1);
P_INT (ht->pr, 1) = (intptr_t) (key2);
P_INT (ht->pr, 2) = ht->ud;
ht->pr->pr_argc = 3;
PR_ExecuteProgram (ht->pr, ht->cmp);
int cmp = R_INT (ht->pr);
PR_PopFrame (ht->pr);
return cmp;
}
static void
bi_free (void *key, void *_ht)
{
bi_hashtab_t *ht = (bi_hashtab_t *)_ht;
PR_PushFrame (ht->pr);
PR_RESET_PARAMS (ht->pr);
P_INT (ht->pr, 0) = (intptr_t) (key);
P_INT (ht->pr, 1) = ht->ud;
ht->pr->pr_argc = 2;
PR_ExecuteProgram (ht->pr, ht->f);
PR_PopFrame (ht->pr);
}
static void
bi_Hash_NewTable (progs_t *pr)
{
hash_resources_t *res = PR_Resources_Find (pr, "Hash");
int tsize = P_INT (pr, 0);
const char *(*gk)(const void*,void*);
void (*f)(void*,void*);
bi_hashtab_t *ht;
ht = table_new (res);
ht->pr = pr;
ht->gk = P_FUNCTION (pr, 1);
ht->f = P_FUNCTION (pr, 2);
ht->ud = P_INT (pr, 3); // don't convert pointer for speed reasons
ht->next = res->tabs;
ht->prev = &res->tabs;
if (res->tabs)
res->tabs->prev = &ht->next;
res->tabs = ht;
gk = ht->gk ? bi_get_key : 0;
f = ht->f ? bi_free : 0;
ht->tab = Hash_NewTable (tsize, gk, f, ht, pr->hashlink_freelist);
R_INT (pr) = table_index (res, ht);
}
static bi_hashtab_t *
get_table (progs_t *pr, const char *name, int index)
{
hash_resources_t *res = PR_Resources_Find (pr, "Hash");
bi_hashtab_t *ht = table_get (res, index);
if (!ht)
PR_RunError (pr, "invalid hash table index passed to %s", name + 3);
return ht;
}
static void
bi_Hash_SetHashCompare (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
uintptr_t (*gh)(const void*,void*);
int (*cmp)(const void*,const void*,void*);
ht->gh = P_FUNCTION (pr, 1);
ht->cmp = P_FUNCTION (pr, 2);
gh = ht->gh ? bi_get_hash : 0;
cmp = ht->cmp ? bi_compare : 0;
Hash_SetHashCompare (ht->tab, gh, cmp);
}
static void
bi_Hash_DelTable (progs_t *pr)
{
hash_resources_t *res = PR_Resources_Find (pr, "Hash");
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
Hash_DelTable (ht->tab);
*ht->prev = ht->next;
if (ht->next)
ht->next->prev = ht->prev;
table_free (res, ht);
}
static void
bi_Hash_FlushTable (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
Hash_FlushTable (ht->tab);
}
static void
bi_Hash_Add (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
R_INT (pr) = Hash_Add (ht->tab, (void *) (intptr_t) P_INT (pr, 1));
}
static void
bi_Hash_AddElement (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
R_INT (pr) = Hash_AddElement (ht->tab, (void *) (intptr_t) P_INT (pr, 1));
}
static void
bi_Hash_Find (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
R_INT (pr) = (intptr_t) Hash_Find (ht->tab, P_GSTRING (pr, 1));
}
static void
bi_Hash_FindElement (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
R_INT (pr) = (intptr_t) Hash_FindElement (ht->tab,
(void *) (intptr_t) P_INT (pr, 1));
}
static void
bi_Hash_FindList (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
void **list, **l;
pr_type_t *pr_list;
int count;
list = Hash_FindList (ht->tab, P_GSTRING (pr, 1));
for (count = 1, l = list; *l; l++)
count++;
pr_list = PR_Zone_Malloc (pr, count * sizeof (pr_type_t));
// the hash tables stores progs pointers...
for (count = 0, l = list; *l; l++)
pr_list[count++].int_var = (intptr_t) *l;
free (list);
RETURN_POINTER (pr, pr_list);
}
static void
bi_Hash_FindElementList (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
void **list, **l;
pr_type_t *pr_list;
int count;
list = Hash_FindElementList (ht->tab, (void *) (intptr_t) P_INT (pr, 1));
for (count = 1, l = list; *l; l++)
count++;
pr_list = PR_Zone_Malloc (pr, count * sizeof (pr_type_t));
// the hash tables stores progs pointers...
for (count = 0, l = list; *l; l++)
pr_list[count++].int_var = (intptr_t) *l;
free (list);
RETURN_POINTER (pr, pr_list);
}
static void
bi_Hash_Del (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
R_INT (pr) = (intptr_t) Hash_Del (ht->tab, P_GSTRING (pr, 1));
}
static void
bi_Hash_DelElement (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
R_INT (pr) = (intptr_t) Hash_DelElement (ht->tab,
(void *) (intptr_t) P_INT (pr, 1));
}
static void
bi_Hash_Free (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
Hash_Free (ht->tab, (void *) (intptr_t) P_INT (pr, 1));
}
static void
bi_Hash_String (progs_t *pr)
{
R_INT (pr) = Hash_String (P_GSTRING (pr, 0));
}
static void
bi_Hash_Buffer (progs_t *pr)
{
R_INT (pr) = Hash_Buffer (P_GPOINTER (pr, 0), P_INT (pr, 1));
}
static void
bi_Hash_GetList (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
void **list, **l;
pr_type_t *pr_list;
int count;
list = Hash_GetList (ht->tab);
for (count = 1, l = list; *l; l++)
count++;
pr_list = PR_Zone_Malloc (pr, count * sizeof (pr_type_t));
// the hash tables stores progs pointers...
for (count = 0, l = list; *l; l++)
pr_list[count++].int_var = (intptr_t) *l;
free (list);
RETURN_POINTER (pr, pr_list);
}
static void
bi_Hash_Stats (progs_t *pr)
{
bi_hashtab_t *ht = get_table (pr, __FUNCTION__, P_INT (pr, 0));
Hash_Stats (ht->tab);
}
static void
bi_hash_clear (progs_t *pr, void *data)
{
hash_resources_t *res = (hash_resources_t *) data;
bi_hashtab_t *ht;
for (ht = res->tabs; ht; ht = ht->next)
Hash_DelTable (ht->tab);
res->tabs = 0;
table_reset (res);
}
#define bi(x,np,params...) {#x, bi_##x, -1, np, {params}}
#define p(type) PR_PARAM(type)
static builtin_t builtins[] = {
bi(Hash_NewTable, 4, p(int), p(func), p(func), p(ptr)),
bi(Hash_SetHashCompare, 3, p(ptr), p(func), p(func)),
bi(Hash_DelTable, 1, p(ptr)),
bi(Hash_FlushTable, 1, p(ptr)),
bi(Hash_Add, 2, p(ptr), p(ptr)),
bi(Hash_AddElement, 2, p(ptr), p(ptr)),
bi(Hash_Find, 2, p(ptr), p(string)),
bi(Hash_FindElement, 2, p(ptr), p(ptr)),
bi(Hash_FindList, 2, p(ptr), p(string)),
bi(Hash_FindElementList, 2, p(ptr), p(ptr)),
bi(Hash_Del, 2, p(ptr), p(string)),
bi(Hash_DelElement, 2, p(ptr), p(ptr)),
bi(Hash_Free, 2, p(ptr), p(ptr)),
bi(Hash_String, 1, p(string)),
bi(Hash_Buffer, 2, p(ptr), p(int)),
bi(Hash_GetList, 1, p(ptr)),
bi(Hash_Stats, 1, p(ptr)),
{0}
};
void
RUA_Hash_Init (progs_t *pr, int secure)
{
hash_resources_t *res = calloc (1, sizeof (hash_resources_t));
res->tabs = 0;
PR_Resources_Register (pr, "Hash", res, bi_hash_clear);
PR_RegisterBuiltins (pr, builtins, res);
}
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