-/* $Id$ */
+/* dict_cursor - iterators over dictionaries */
-/* dict_cursor - iterators over dictionnaries */
-
-/* Copyright (c) 2003, 2004 Martin Quinson. All rights reserved. */
+/* Copyright (c) 2004-2018. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
#include "xbt/misc.h"
+#include "xbt/ex.h"
#include "dict_private.h"
-#include <string.h> /* strlen() */
-
-XBT_LOG_EXTERNAL_CATEGORY(dict);
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(dict_cursor,dict,"To traverse dictionaries");
+#include <string.h> /* strlen() */
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_dict_cursor, xbt_dict, "To traverse dictionaries");
/*####[ Dict cursor functions ]#############################################*/
/* To traverse (simple) dicts */
/* Don't add or remove entries to the dict while traversing !!! */
/*###########################################################################*/
-struct xbt_dict_cursor_ {
- /* we store all level encountered until here, to backtrack on next() */
- xbt_dynar_t keys;
- xbt_dynar_t key_lens;
- int pos;
- int pos_len;
- xbt_dictelm_t head;
-};
-
-static _XBT_INLINE void
-_cursor_push_keys(xbt_dict_cursor_t p_cursor,
- xbt_dictelm_t p_elm);
-
-#undef xbt_dict_CURSOR_DEBUG
-/*#define xbt_dict_CURSOR_DEBUG 1*/
-/**
- * xbt_dict_cursor_new:
- *
- * @head: the head of the dict
- * @cursor: the curent position in the dict
- *
- * Structure creator
+/** @brief Creator
+ * @param dict the dict
*/
-xbt_dict_cursor_t
-xbt_dict_cursor_new(const xbt_dict_t head) {
- xbt_dict_cursor_t res = NULL;
-
- res = xbt_new(s_xbt_dict_cursor_t,1);
- res->keys = xbt_dynar_new(sizeof(char **), NULL);
- res->key_lens = xbt_dynar_new(sizeof(int *), NULL);
- res->pos = 0;
- res->pos_len = 0;
- res->head = head ? head->head : NULL;
+inline xbt_dict_cursor_t xbt_dict_cursor_new(const xbt_dict_t dict)
+{
+ xbt_dict_cursor_t res = xbt_new(struct s_xbt_dict_cursor, 1);
+ res->dict = dict;
xbt_dict_cursor_rewind(res);
}
/**
- * xbt_dict_cursor_free:
- *
- * @cursor: poor victim
- *
- * Structure destructor
+ * @brief Destructor
+ * @param cursor poor victim
*/
-void
-xbt_dict_cursor_free(xbt_dict_cursor_t *cursor) {
- if (*cursor) {
- xbt_dynar_free(&((*cursor)->keys));
- xbt_dynar_free(&((*cursor)->key_lens));
- xbt_free(*cursor);
- *cursor = NULL;
- }
+inline void xbt_dict_cursor_free(xbt_dict_cursor_t * cursor)
+{
+ xbt_free(*cursor);
+ *cursor = NULL;
}
-/**
- * __cursor_not_null:
- *
+/*
* Sanity check to see if the head contains something
*/
-static _XBT_INLINE
-xbt_error_t
-__cursor_not_null(xbt_dict_cursor_t cursor) {
-
- xbt_assert0(cursor, "Null cursor");
-
- if (!cursor->head) {
- return mismatch_error;
- }
-
- return no_error;
-}
-
-
-static _XBT_INLINE
-void
-_cursor_push_keys(xbt_dict_cursor_t cursor,
- xbt_dictelm_t elm) {
- xbt_dictelm_t child = NULL;
- int i = 0;
- static volatile int count = 0; /* ??? */
-
- CDEBUG1(dict_cursor, "Push childs of %p in the cursor", (void*)elm);
-
- if (elm->content) {
- xbt_dynar_push(cursor->keys, &elm->key );
- xbt_dynar_push(cursor->key_lens, &elm->key_len);
- count++;
- }
-
- xbt_dynar_foreach(elm->sub, i, child) {
- if (child)
- _cursor_push_keys(cursor, child);
- }
-
- CDEBUG1(dict_cursor, "Count = %d", count);
+static inline void __cursor_not_null(xbt_dict_cursor_t cursor)
+{
+ xbt_assert(cursor, "Null cursor");
}
-/**
- * xbt_dict_cursor_rewind:
- * @cursor: the cursor
- * @Returns: xbt_error_t
- *
- * back to the first element
- */
-void
-xbt_dict_cursor_rewind(xbt_dict_cursor_t cursor) {
-
- CDEBUG0(dict_cursor, "xbt_dict_cursor_rewind");
+/** @brief Reinitialize the cursor. Mandatory after removal or add in dict. */
+inline void xbt_dict_cursor_rewind(xbt_dict_cursor_t cursor)
+{
+ XBT_CDEBUG(xbt_dict_cursor, "xbt_dict_cursor_rewind");
xbt_assert(cursor);
- xbt_dynar_reset(cursor->keys);
- xbt_dynar_reset(cursor->key_lens);
-
- if (!cursor->head)
- return ;
-
- _cursor_push_keys(cursor, cursor->head);
-
- xbt_dynar_cursor_first(cursor->keys, &cursor->pos );
- xbt_dynar_cursor_first(cursor->key_lens, &cursor->pos_len);
-
+ cursor->line = 0;
+ if (cursor->dict != NULL) {
+ cursor->current = cursor->dict->table[0];
+ } else {
+ cursor->current = NULL;
+ }
}
/**
- * xbt_dict_cursor_first:
- * @dict: on what to let the cursor iterate
- * @cursor: dest address
+ * @brief Create the cursor if it does not exists. Rewind it in any case.
*
- * Create the cursor if it does not exists. Rewind it in any case.
+ * @param dict on what to let the cursor iterate
+ * @param[out] cursor dest address
*/
-void xbt_dict_cursor_first (const xbt_dict_t dict,
- xbt_dict_cursor_t *cursor){
-
+inline void xbt_dict_cursor_first(const xbt_dict_t dict, xbt_dict_cursor_t * cursor)
+{
+ XBT_CDEBUG(xbt_dict_cursor, "xbt_dict_cursor_first");
if (!*cursor) {
- DEBUG0("Create the cursor on first use");
- *cursor=xbt_dict_cursor_new(dict);
+ XBT_CDEBUG(xbt_dict_cursor, "Create the cursor on first use");
+ *cursor = xbt_dict_cursor_new(dict);
+ } else {
+ xbt_dict_cursor_rewind(*cursor);
+ }
+ if (dict != NULL && (*cursor)->current == NULL) {
+ xbt_dict_cursor_step(*cursor); /* find the first element */
}
-
- xbt_dict_cursor_rewind(*cursor);
}
+/** \brief Move to the next element. */
+inline void xbt_dict_cursor_step(xbt_dict_cursor_t cursor)
+{
+ xbt_dictelm_t current;
+ int line;
-/**
- * xbt_dict_cursor_step:
- * @cursor: the cursor
- *
- * Move to the next element.
- */
-void
-xbt_dict_cursor_step(xbt_dict_cursor_t cursor) {
+ XBT_CDEBUG(xbt_dict_cursor, "xbt_dict_cursor_step");
xbt_assert(cursor);
- xbt_dynar_cursor_step(cursor->keys, &cursor->pos);
- xbt_dynar_cursor_step(cursor->key_lens, &cursor->pos_len);
+ current = cursor->current;
+ line = cursor->line;
+
+ if (cursor->dict != NULL) {
+ if (current != NULL) {
+ XBT_CDEBUG(xbt_dict_cursor, "current is not null, take the next element");
+ current = current->next;
+ XBT_CDEBUG(xbt_dict_cursor, "next element: %p", current);
+ }
+
+ while (current == NULL && (line + 1) <= cursor->dict->table_size) {
+ line++;
+ XBT_CDEBUG(xbt_dict_cursor, "current is NULL, take the next line");
+ current = cursor->dict->table[line];
+ XBT_CDEBUG(xbt_dict_cursor, "element in the next line: %p", current);
+ }
+ XBT_CDEBUG(xbt_dict_cursor, "search finished, current = %p, line = %d", current, line);
+
+ cursor->current = current;
+ cursor->line = line;
+ }
}
/**
- * xbt_dict_cursor_get_or_free:
- * @cursor: the cursor
- * @Returns: true if it's ok, false if there is no more data
+ * @brief Get current data, or free the cursor if there is no data left
*
- * Get current data
+ * @returns true if it's ok, false if there is no more data
*/
-int
-xbt_dict_cursor_get_or_free(xbt_dict_cursor_t *cursor,
- char **key,
- void **data) {
- xbt_error_t errcode = no_error;
- int key_len = 0;
-
- if (!cursor || !(*cursor))
- return FALSE;
+inline int xbt_dict_cursor_get_or_free(xbt_dict_cursor_t * cursor, char **key, void **data)
+{
+ xbt_dictelm_t current;
- if (xbt_dynar_length((*cursor)->keys) <= (*cursor)->pos) {
- xbt_dict_cursor_free(cursor);
- return FALSE;
- }
-
- *key = xbt_dynar_get_as((*cursor)->keys, (*cursor)->pos, char*);
- key_len = xbt_dynar_get_as((*cursor)->key_lens, (*cursor)->pos_len, int);
+ XBT_CDEBUG(xbt_dict_cursor, "xbt_dict_get_or_free");
+
+ if (!cursor || !(*cursor))
+ return 0;
- errcode = xbt_dictelm_get_ext((*cursor)->head, *key, key_len, data);
- if (errcode == mismatch_error) {
+ current = (*cursor)->current;
+ if (current == NULL) { /* no data left */
xbt_dict_cursor_free(cursor);
- return FALSE;
+ return 0;
}
- xbt_assert1(errcode == no_error,
- "Unexpected problem while retrieving the content of cursor. Got %s",
- xbt_error_name(errcode));
-
- return TRUE;
+ *key = current->key;
+ *data = current->content;
+ return 1;
}
/**
- * xbt_dict_cursor_get_key:
- * @cursor: the cursor
- * @key: the current element
- * @Returns: xbt_error_t
- *
- * Get current key
+ * @brief Get current key
+ * @param cursor: the cursor
+ * @returns the current key
*/
-xbt_error_t
-xbt_dict_cursor_get_key(xbt_dict_cursor_t cursor,
- /*OUT*/char **key) {
- xbt_error_t errcode = no_error;
-
- TRY(__cursor_not_null(cursor));
+inline char *xbt_dict_cursor_get_key(xbt_dict_cursor_t cursor)
+{
+ __cursor_not_null(cursor);
- *key = xbt_dynar_get_as(cursor->keys, cursor->pos - 1, char*);
-
- return errcode;
+ return cursor->current->key;
}
/**
- * xbt_dict_cursor_get_data:
- * @cursor: the cursor
- *
- * Get current data
+ * @brief Get current data
+ * @param cursor the cursor
+ * @returns the current data
*/
-xbt_error_t
-xbt_dict_cursor_get_data(xbt_dict_cursor_t cursor,
- /*OUT*/void **data) {
- xbt_error_t errcode = no_error;
- char *key = NULL;
- int key_len = 0;
-
- TRY(__cursor_not_null(cursor));
-
- key = xbt_dynar_get_as(cursor->keys, cursor->pos-1, char *);
- key_len = xbt_dynar_get_as(cursor->key_lens, cursor->pos_len-1, int);
+inline void *xbt_dict_cursor_get_data(xbt_dict_cursor_t cursor)
+{
+ __cursor_not_null(cursor);
- TRY(xbt_dictelm_get_ext(cursor->head, key, key_len, data));
-
- return errcode;
+ return cursor->current->content;
}
-
-
