* @file
* @brief Hash table to store names.
* @author Goetz Lindenmaier
- * @version $Id$
*/
#include "config.h"
#include "ident_t.h"
#include "set.h"
#include "xmalloc.h"
+#include "hashptr.h"
-/* for debugging only, not the real implementation */
-struct _ident {
- char reserved[sizeof(unsigned) + sizeof(size_t)];
- char data[1];
-};
+static set *id_set;
-/** The current ident module implementation. */
-static ident_if_t impl;
-
-/**
- * Stores a string in the ident module and returns a handle for the string.
- *
- * @param handle the handle for the set
- * @param str the string which shall be stored
- * @param len length of str in bytes
- *
- * @return id - a handle for the generated ident
- *
- * Default implementation using libfirm sets.
- */
-static ident *set_new_id_from_chars(void *handle, const char *str, int len)
+void init_ident(void)
{
- set *id_set = handle;
-
- return (ident *)set_hinsert0(id_set, str, len, ID_HASH(unsigned char, str, len));
+ /* it's ok to use memcmp here, we check only strings */
+ id_set = new_set(memcmp, 128);
}
-/**
- * Stores a string in the ident module and returns a handle for the string.
- *
- * @param handle the handle for the set
- * @param str the string (or whatever) which shall be stored
- *
- * Default implementation using libfirm sets.
- */
-static ident *set_new_id_from_str(void *handle, const char *str)
+ident *new_id_from_chars(const char *str, size_t len)
{
- assert(str);
- return set_new_id_from_chars(handle, str, strlen(str));
-}
-
-/**
- * Returns a string represented by an ident.
- *
- * @param handle the handle for the set
- * @param id the ident
- *
- * Default implementation using libfirm sets.
- */
-static const char *set_get_id_str(void *handle, ident *id)
-{
- struct set_entry *entry = (struct set_entry *)id;
- (void) handle;
-
- return (const char *)entry->dptr;
-}
-
-/**
- * Returns the length of the string represented by an ident.
- *
- * @param handle the handle for the set
- * @param id the ident
- *
- * Default implementation using libfirm sets.
- */
-static int set_get_id_strlen(void *handle, ident *id)
-{
- struct set_entry *entry = (struct set_entry *)id;
- (void) handle;
-
- return entry->size;
-}
-
-/**
- * Default implementation using libfirm sets.
- */
-void set_finish_ident(void *handle)
-{
- set *id_set = handle;
-
- del_set(id_set);
-}
-
-/**
- * Default implementation if no new_id_from_str() is provided.
- */
-static ident *def_new_id_from_str(void *handle, const char *str)
-{
- return impl.new_id_from_chars(handle, str, strlen(str));
-}
-
-/**
- * Default implementation if no get_id_strlen() is provided.
- */
-static int def_get_id_strlen(void *handle, ident *id)
-{
- return strlen(impl.get_id_str(handle, id));
-}
-
-/* Initialize the ident module. */
-void init_ident(ident_if_t *id_if, int initial_n_idents)
-{
- if (id_if) {
- memcpy(&impl, id_if, sizeof(impl));
-
- if (! impl.new_id_from_str)
- impl.new_id_from_str = def_new_id_from_str;
- if (! impl.get_id_strlen)
- impl.get_id_strlen = def_get_id_strlen;
- } else {
- impl.new_id_from_str = set_new_id_from_str;
- impl.new_id_from_chars = set_new_id_from_chars;
- impl.get_id_str = set_get_id_str;
- impl.get_id_strlen = set_get_id_strlen;
- impl.finish_ident = set_finish_ident;
-
- /* it's ok to use memcmp here, we check only strings */
- impl.handle = new_set(memcmp, initial_n_idents);
- }
+ unsigned hash = hash_data((const unsigned char*)str, len);
+ ident *result = (ident*) set_hinsert0(id_set, str, len, hash);
+ return result;
}
ident *new_id_from_str(const char *str)
{
- assert(str != NULL);
- return impl.new_id_from_str(impl.handle, str);
-}
-
-ident *new_id_from_chars(const char *str, int len)
-{
- return impl.new_id_from_chars(impl.handle, str, len);
+ assert(str != NULL);
+ return new_id_from_chars(str, strlen(str));
}
const char *get_id_str(ident *id)
{
- return impl.get_id_str(impl.handle, id);
+ struct set_entry *entry = (struct set_entry*) id;
+ return (const char*) entry->dptr;
}
-int get_id_strlen(ident *id)
+size_t get_id_strlen(ident *id)
{
- return impl.get_id_strlen(impl.handle, id);
+ struct set_entry *entry = (struct set_entry*) id;
+ return entry->size;
}
void finish_ident(void)
{
- if (impl.finish_ident)
- impl.finish_ident(impl.handle);
+ del_set(id_set);
+ id_set = NULL;
}
int id_is_prefix(ident *prefix, ident *id)
{
- if (get_id_strlen(prefix) > get_id_strlen(id)) return 0;
- return 0 == memcmp(get_id_str(prefix), get_id_str(id), get_id_strlen(prefix));
+ size_t prefix_len = get_id_strlen(prefix);
+ if (prefix_len > get_id_strlen(id))
+ return 0;
+ return 0 == memcmp(get_id_str(prefix), get_id_str(id), prefix_len);
}
int id_is_suffix(ident *suffix, ident *id)
{
- int suflen = get_id_strlen(suffix);
- int idlen = get_id_strlen(id);
- const char *part;
+ size_t suflen = get_id_strlen(suffix);
+ size_t idlen = get_id_strlen(id);
+ const char *part;
- if (suflen > idlen) return 0;
+ if (suflen > idlen)
+ return 0;
- part = get_id_str(id);
- part = part + (idlen - suflen);
+ part = get_id_str(id);
+ part = part + (idlen - suflen);
- return 0 == memcmp(get_id_str(suffix), part, suflen);
+ return 0 == memcmp(get_id_str(suffix), part, suflen);
}
int id_contains_char(ident *id, char c)
{
- return strchr(get_id_str(id), c) != NULL;
+ return strchr(get_id_str(id), c) != NULL;
}
ident *id_unique(const char *tag)
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