/* dict_cursor - iterators over dictionnaries */
-/* Authors: Martin Quinson */
-/* Copyright (C) 2003,2004 Martin Quinson. */
+/* Copyright (c) 2003, 2004 Martin Quinson. 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. */
+ * 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");
+XBT_LOG_EXTERNAL_CATEGORY(xbt_dict);
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_dict_cursor,xbt_dict,"To traverse dictionaries");
/*####[ Dict cursor functions ]#############################################*/
/* 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;
+ xbt_dictelm_t current;
+ int line;
+ xbt_dict_t dict;
};
-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 xbt_dict_cursor_new(const xbt_dict_t dict) {
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;
+ res = xbt_new(s_xbt_dict_cursor_t, 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) {
+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;
}
}
-/**
- * __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) {
-
+static XBT_INLINE void __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);
+/** @brief Reinitialize the cursor. Mandatory after removal or add in dict. */
+void xbt_dict_cursor_rewind(xbt_dict_cursor_t cursor) {
+ CDEBUG0(xbt_dict_cursor, "xbt_dict_cursor_rewind");
+ xbt_assert(cursor);
- if (elm->content) {
- xbt_dynar_push(cursor->keys, &elm->key );
- xbt_dynar_push(cursor->key_lens, &elm->key_len);
- count++;
+ cursor->line = 0;
+ if (cursor->dict != NULL) {
+ cursor->current = cursor->dict->table[0];
}
-
- xbt_dynar_foreach(elm->sub, i, child) {
- if (child)
- _cursor_push_keys(cursor, child);
+ else {
+ cursor->current = NULL;
}
-
- CDEBUG1(dict_cursor, "Count = %d", count);
}
/**
- * xbt_dict_cursor_rewind:
- * @cursor: the cursor
- * @Returns: xbt_error_t
+ * @brief Create the cursor if it does not exists. Rewind it in any case.
*
- * back to the first element
+ * @param dict on what to let the cursor iterate
+ * @param[out] cursor dest address
*/
-void
-xbt_dict_cursor_rewind(xbt_dict_cursor_t cursor) {
+void xbt_dict_cursor_first(const xbt_dict_t dict,
+ xbt_dict_cursor_t *cursor){
+ DEBUG0("xbt_dict_cursor_first");
+ if (!*cursor) {
+ DEBUG0("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 */
+ }
+}
- CDEBUG0(dict_cursor, "xbt_dict_cursor_rewind");
- xbt_assert(cursor);
- xbt_dynar_reset(cursor->keys);
- xbt_dynar_reset(cursor->key_lens);
+/**
+ * \brief Move to the next element.
+ */
+void xbt_dict_cursor_step(xbt_dict_cursor_t cursor) {
- if (!cursor->head)
- return ;
- _cursor_push_keys(cursor, cursor->head);
+ xbt_dictelm_t current ;
+ int line;
- xbt_dynar_cursor_first(cursor->keys, &cursor->pos );
- xbt_dynar_cursor_first(cursor->key_lens, &cursor->pos_len);
+ DEBUG0("xbt_dict_cursor_step");
+ xbt_assert(cursor);
-}
+ current = cursor->current;
+ line = cursor->line;
-/**
- * xbt_dict_cursor_first:
- * @dict: on what to let the cursor iterate
- * @cursor: dest address
- *
- * Create the cursor if it does not exists. Rewind it in any case.
- */
-void xbt_dict_cursor_first (const xbt_dict_t dict,
- xbt_dict_cursor_t *cursor){
+ if (cursor->dict != NULL) {
- if (!*cursor) {
- DEBUG0("Create the cursor on first use");
- *cursor=xbt_dict_cursor_new(dict);
+ if (current != NULL) {
+ DEBUG0("current is not null, take the next element");
+ current = current->next;
+ DEBUG1("next element: %p", current);
+ }
+
+ while (current == NULL && ++line < cursor->dict->table_size) {
+ DEBUG0("current is NULL, take the next line");
+ current = cursor->dict->table[line];
+ DEBUG1("element in the next line: %p", current);
+ }
+ DEBUG2("search finished, current = %p, line = %d", current, line);
+
+ cursor->current = current;
+ cursor->line = line;
}
-
- xbt_dict_cursor_rewind(*cursor);
}
-
/**
- * xbt_dict_cursor_step:
- * @cursor: the cursor
+ * @brief Get current data, or free the cursor if there is no data left
*
- * Move to the next element.
+ * @returns true if it's ok, false if there is no more data
*/
-void
-xbt_dict_cursor_step(xbt_dict_cursor_t cursor) {
- xbt_assert(cursor);
+int xbt_dict_cursor_get_or_free(xbt_dict_cursor_t *cursor,
+ char **key,
+ void **data) {
- xbt_dynar_cursor_step(cursor->keys, &cursor->pos);
- xbt_dynar_cursor_step(cursor->key_lens, &cursor->pos_len);
-}
+ xbt_dictelm_t current;
-/**
- * xbt_dict_cursor_get_or_free:
- * @cursor: the cursor
- * @Returns: true if it's ok, false if there is no more data
- *
- * Get current 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;
+ DEBUG0("xbt_dict_get_or_free");
- if (xbt_dynar_length((*cursor)->keys) <= (*cursor)->pos) {
- xbt_dict_cursor_free(cursor);
+
+ if (!cursor || !(*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);
- 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;
}
-
- xbt_assert1(errcode == no_error,
- "Unexpected problem while retrieving the content of cursor. Got %s",
- xbt_error_name(errcode));
-
+
+ *key = current->key;
+ *data = current->content;
return TRUE;
}
/**
- * 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));
+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);
-
- TRY(xbt_dictelm_get_ext(cursor->head, key, key_len, data));
+void *xbt_dict_cursor_get_data(xbt_dict_cursor_t cursor) {
+ __cursor_not_null(cursor);
- return errcode;
+ return cursor->current->content;
}