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/*
* Copyright 2008-2009 Katholieke Universiteit Leuven
*
* Use of this software is governed by the MIT license
*
* Written by Sven Verdoolaege, K.U.Leuven, Departement
* Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
*/
#include <string.h>
#include <isl_ctx_private.h>
#include <isl_id_private.h>
/* A special, static isl_id to use as domains (and ranges)
* of sets and parameters domains.
* The user should never get a hold on this isl_id.
*/
isl_id isl_id_none = {
.ref = -1,
.ctx = NULL,
.name = "#none",
.user = NULL
};
isl_ctx *isl_id_get_ctx(__isl_keep isl_id *id)
{
return id ? id->ctx : NULL;
}
void *isl_id_get_user(__isl_keep isl_id *id)
{
return id ? id->user : NULL;
}
const char *isl_id_get_name(__isl_keep isl_id *id)
{
return id ? id->name : NULL;
}
static __isl_give isl_id *id_alloc(isl_ctx *ctx, const char *name, void *user)
{
const char *copy = name ? strdup(name) : NULL;
isl_id *id;
if (name && !copy)
return NULL;
id = isl_calloc_type(ctx, struct isl_id);
if (!id)
goto error;
id->ctx = ctx;
isl_ctx_ref(id->ctx);
id->ref = 1;
id->name = copy;
id->user = user;
id->hash = isl_hash_init();
if (name)
id->hash = isl_hash_string(id->hash, name);
else
id->hash = isl_hash_builtin(id->hash, user);
return id;
error:
free((char *)copy);
return NULL;
}
struct isl_name_and_user {
const char *name;
void *user;
};
static int isl_id_has_name_and_user(const void *entry, const void *val)
{
isl_id *id = (isl_id *)entry;
struct isl_name_and_user *nu = (struct isl_name_and_user *) val;
if (id->user != nu->user)
return 0;
if (!id->name && !nu->name)
return 1;
return !strcmp(id->name, nu->name);
}
__isl_give isl_id *isl_id_alloc(isl_ctx *ctx, const char *name, void *user)
{
struct isl_hash_table_entry *entry;
uint32_t id_hash;
struct isl_name_and_user nu = { name, user };
id_hash = isl_hash_init();
if (name)
id_hash = isl_hash_string(id_hash, name);
else
id_hash = isl_hash_builtin(id_hash, user);
entry = isl_hash_table_find(ctx, &ctx->id_table, id_hash,
isl_id_has_name_and_user, &nu, 1);
if (!entry)
return NULL;
if (entry->data)
return isl_id_copy(entry->data);
entry->data = id_alloc(ctx, name, user);
if (!entry->data)
ctx->id_table.n--;
return entry->data;
}
/* If the id has a negative refcount, then it is a static isl_id
* which should not be changed.
*/
__isl_give isl_id *isl_id_copy(isl_id *id)
{
if (!id)
return NULL;
if (id->ref < 0)
return id;
id->ref++;
return id;
}
static int isl_id_eq(const void *entry, const void *name)
{
return entry == name;
}
uint32_t isl_hash_id(uint32_t hash, __isl_keep isl_id *id)
{
if (id)
isl_hash_hash(hash, id->hash);
return hash;
}
/* Replace the free_user callback by "free_user".
*/
__isl_give isl_id *isl_id_set_free_user(__isl_take isl_id *id,
__isl_give void (*free_user)(void *user))
{
if (!id)
return NULL;
id->free_user = free_user;
return id;
}
/* If the id has a negative refcount, then it is a static isl_id
* and should not be freed.
*/
void *isl_id_free(__isl_take isl_id *id)
{
struct isl_hash_table_entry *entry;
if (!id)
return NULL;
if (id->ref < 0)
return NULL;
if (--id->ref > 0)
return NULL;
entry = isl_hash_table_find(id->ctx, &id->ctx->id_table, id->hash,
isl_id_eq, id, 0);
if (!entry)
isl_die(id->ctx, isl_error_unknown,
"unable to find id", (void)0);
else
isl_hash_table_remove(id->ctx, &id->ctx->id_table, entry);
if (id->free_user)
id->free_user(id->user);
free((char *)id->name);
isl_ctx_deref(id->ctx);
free(id);
return NULL;
}
__isl_give isl_printer *isl_printer_print_id(__isl_take isl_printer *p,
__isl_keep isl_id *id)
{
if (!id)
goto error;
if (id->name)
p = isl_printer_print_str(p, id->name);
if (id->user) {
char buffer[50];
snprintf(buffer, sizeof(buffer), "@%p", id->user);
p = isl_printer_print_str(p, buffer);
}
return p;
error:
isl_printer_free(p);
return NULL;
}
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