From 6eb40f45f49f664ad67687236caf426efb86f74c Mon Sep 17 00:00:00 2001
From: mquinson <mquinson@48e7efb5-ca39-0410-a469-dd3cf9ba447f>
Date: Mon, 29 Jun 2009 21:11:27 +0000
Subject: [PATCH] Add xbt_set_get_by_name_or_null() [Silas De Munck]

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@6391 48e7efb5-ca39-0410-a469-dd3cf9ba447f
---
 ChangeLog         |  3 +++
 include/xbt/set.h | 15 ++++++++-------
 src/xbt/set.c     | 12 ++++++++++++
 3 files changed, 23 insertions(+), 7 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c628e23e38..0b4b561be6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -3,6 +3,9 @@ SimGrid (3.3.2-svn) unstable; urgency=low
  SMPI:
   * Implement MPI_Waitany and MPI_Waitall 
 
+ XBT:
+  * Add xbt_set_get_by_name_or_null() [Silas De Munck]
+
  -- Da SimGrid team <simgrid-devel@lists.gforge.inria.fr>
 
 SimGrid (3.3.1) stable; urgency=low
diff --git a/include/xbt/set.h b/include/xbt/set.h
index db57ed89c6..9191f6ae0e 100644
--- a/include/xbt/set.h
+++ b/include/xbt/set.h
@@ -17,7 +17,7 @@ SG_BEGIN_DECL()
 
 /** @addtogroup XBT_set
  *  @brief A data container consisting in \ref XBT_dict and \ref XBT_dynar
- * 
+ *
  *  The elements stored in such a data structure can be retrieve both by
  *  name and by ID. For this to work, the first fields of the structures
  *  stored must begin with the following fields:
@@ -25,22 +25,22 @@ SG_BEGIN_DECL()
  unsigned int ID;
  char        *name;
  unsigned int name_len;
- // my other fields, constituting the payload 
+ // my other fields, constituting the payload
 } my_element_type_t; \endverbatim
- * 
- *  Since we are casting elements around, no protection is ensured by the 
- * compiler. It is thus safer to define the headers using the macro 
+ *
+ *  Since we are casting elements around, no protection is ensured by the
+ * compiler. It is thus safer to define the headers using the macro
  * defined to that extend:
  *  \verbatim struct {
  XBT_SET_HEADERS;
 
- // my other fields, constituting the payload 
+ // my other fields, constituting the payload
 } my_element_type_t; \endverbatim
  *
  *  It is now possible to remove an element from such a data structure.
  *
  *  @todo
- *  Such a datastructure was necessary/useful to store the GRAS type 
+ *  Such a datastructure was necessary/useful to store the GRAS type
  *  descriptions, but it should be reworked to become generic.
  *
  */
@@ -80,6 +80,7 @@ XBT_PUBLIC(void) xbt_set_add(xbt_set_t set, xbt_set_elm_t elm,
                              void_f_pvoid_t free_func);
 XBT_PUBLIC(void) xbt_set_remove(xbt_set_t set, xbt_set_elm_t elm);
 XBT_PUBLIC(void) xbt_set_remove_by_name(xbt_set_t set, const char *key);
+XBT_PUBLIC(xbt_set_elm_t) xbt_set_get_by_name_or_null(xbt_set_t set, const char *key);
 XBT_PUBLIC(void) xbt_set_remove_by_name_ext(xbt_set_t set, const char *key,
                                             int key_len);
 XBT_PUBLIC(void) xbt_set_remove_by_id(xbt_set_t set, int id);
diff --git a/src/xbt/set.c b/src/xbt/set.c
index 0e56152a8d..62250a248d 100644
--- a/src/xbt/set.c
+++ b/src/xbt/set.c
@@ -182,6 +182,18 @@ xbt_set_elm_t xbt_set_get_by_name(xbt_set_t set, const char *name)
   return xbt_dict_get(set->dict, name);
 }
 
+/** @brief Retrieve data by providing its name.
+ *
+ * \param set
+ * \param name Name of the searched cell
+ * \returns the data you're looking for, returns NULL if not found
+ */
+xbt_set_elm_t xbt_set_get_by_name_or_null    (xbt_set_t     set,
+                                      const char     *name) {
+  DEBUG1("Lookup key %s",name);
+  return xbt_dict_get_or_null(set->dict, name);
+}
+
 /** @brief Retrieve data by providing its name and the length of the name
  *
  * \param set
-- 
2.20.1