Implemented first steps to a Python plugins support.

git-svn-id: svn://svn.gna.org/svn/chrysalide/trunk@146 abbe820e-26c8-41b2-8c08-b7b2b41f8b0a

4 files changed, 140 insertions, 2 deletions

diff --git a/src/common/Makefile.am b/src/common/Makefile.am
index c4937dd..7aa255e 100755
--- a/src/common/Makefile.am
+++ b/src/common/Makefile.am
@@ -4,6 +4,7 @@ lib_LTLIBRARIES = libcommon.la
 libcommon_la_SOURCES =					\
 	dllist.h dllist.c					\
 	endianness.h endianness.c			\
+	environment.h environment.c			\
 	extstr.h extstr.c					\
 	macros.h							\
 	xml.h xml.c
diff --git a/src/common/dllist.h b/src/common/dllist.h
index 499151e..504291e 100644
--- a/src/common/dllist.h
+++ b/src/common/dllist.h
@@ -121,6 +121,10 @@ void __dl_list_del(dl_list_item *, dl_list_head *);
     (iter->member.next == &head->member ?                                           \
      NULL : container_of(iter->member.next, type, member))
 
+#define dl_list_prev_iter(iter, head, type, member)                                 \
+    (&iter->member == &head->member ?                                               \
+     NULL : container_of(iter->member.prev, type, member))
+
 #define dl_list_for_each(pos, head, type, member)                                   \
 	for (pos = head;                                                                \
          pos != NULL;                                                               \
@@ -140,8 +144,7 @@ void __dl_list_del(dl_list_item *, dl_list_head *);
 #define dl_list_for_each_rev(pos, head, type, member)                               \
 	for (pos = dl_list_last(head, type, member);                                    \
          pos != NULL;                                                               \
-         pos = (pos == head ?                                                       \
-                NULL : container_of(pos->member.prev, type, member)))
+         pos = dl_list_prev_iter(pos, (head), type, member))
 
 
 
diff --git a/src/common/environment.c b/src/common/environment.c
new file mode 100644
index 0000000..a0fa568
--- /dev/null
+++ b/src/common/environment.c
@@ -0,0 +1,94 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * environment.c - manipulations des variables d'environnement.
+ *
+ * Copyright (C) 2010 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "environment.h"
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+#include "extstr.h"
+
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : name = désignation de la variable à traiter.                 *
+*                                                                             *
+*  Description : Fournit le contenu d'une variable d'environnement.           *
+*                                                                             *
+*  Retour      : Chaîne à libérer de la mémoire après usage.                  *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+char *get_env_var(const char *name)
+{
+    char *result;                           /* Chaîne à retourner          */
+
+    result = getenv(name);
+
+    if (result == NULL) result = strdup("");
+    else result = strdup(name);
+
+    return result;
+
+}
+
+
+/******************************************************************************
+*                                                                             *
+*  Paramètres  : name  = désignation de la variable à traiter.                *
+*                value = valeur à ajouter à la variable.                      *
+*                sep   = séparateur entre champs.                             *
+*                                                                             *
+*  Description : Complète le contenu d'une variable d'environnement.          *
+*                                                                             *
+*  Retour      : Bilan de l'opération.                                        *
+*                                                                             *
+*  Remarques   : -                                                            *
+*                                                                             *
+******************************************************************************/
+
+bool add_to_env_var(const char *name, const char *value, const char *sep)
+{
+    char *content;                          /* Contenu final à définir     */
+    int ret;                                /* Bilan d'un appel système    */
+
+    content = get_env_var(name);
+
+    if (strlen(content) > 0) content = stradd(content, sep);
+
+    content = stradd(content, value);
+
+    ret = setenv(name, content, 1);
+    if (ret != 0) perror(setenv);
+
+    free(content);
+
+    return (ret == 0);
+
+}
diff --git a/src/common/environment.h b/src/common/environment.h
new file mode 100644
index 0000000..a96c6eb
--- /dev/null
+++ b/src/common/environment.h
@@ -0,0 +1,40 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * environment.h - prototypes pour la manipulations des variables d'environnement.
+ *
+ * Copyright (C) 2010 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _COMMON_ENVIRONMENT_H
+#define _COMMON_ENVIRONMENT_H
+
+
+#include <stdbool.h>
+
+
+
+/* Fournit le contenu d'une variable d'environnement. */
+char *get_env_var(const char *);
+
+/* Complète le contenu d'une variable d'environnement. */
+bool add_to_env_var(const char *, const char *, const char *);
+
+
+
+#endif  /* _COMMON_ENVIRONMENT_H */