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-rwxr-xr-xsrc/common/Makefile.am16
-rwxr-xr-xsrc/common/endianness.c166
-rwxr-xr-xsrc/common/endianness.h54
3 files changed, 236 insertions, 0 deletions
diff --git a/src/common/Makefile.am b/src/common/Makefile.am
new file mode 100755
index 0000000..323ba17
--- /dev/null
+++ b/src/common/Makefile.am
@@ -0,0 +1,16 @@
+
+lib_LIBRARIES = libcommon.a
+
+libcommon_a_SOURCES = \
+ endianness.h endianness.c
+
+libcommon_a_CFLAGS = $(AM_CFLAGS)
+
+
+INCLUDES =
+
+AM_CPPFLAGS =
+
+AM_CFLAGS = $(DEBUG_CFLAGS) $(WARNING_FLAGS)
+
+SUBDIRS =
diff --git a/src/common/endianness.c b/src/common/endianness.c
new file mode 100755
index 0000000..202262a
--- /dev/null
+++ b/src/common/endianness.c
@@ -0,0 +1,166 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * endianness.c - manipulation abstraite des nombres
+ *
+ * Copyright (C) 2008 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 "endianness.h"
+
+
+
+
+
+
+
+/******************************************************************************
+* *
+* Paramètres : target = lieu d'enregistrement de la lecture. [OUT] *
+* data = flux de données à analyser. *
+* pos = position courante dans ce flux. [OUT] *
+* len = taille totale des données à analyser. *
+* endian = ordre des bits dans la source. *
+* *
+* Description : Lit un nombre non signé sur un octet. *
+* *
+* Retour : Bilan de l'opération : true en cas de succès, false sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool read_u8(uint8_t *target, const uint8_t *data, off_t *pos, off_t len, SourceEndian endian)
+{
+ if ((len - *pos) < 1) return false;
+
+ *target = data[*pos];
+
+ *pos += 1;
+
+ return true;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : target = lieu d'enregistrement de la lecture. [OUT] *
+* data = flux de données à analyser. *
+* pos = position courante dans ce flux. [OUT] *
+* len = taille totale des données à analyser. *
+* endian = ordre des bits dans la source. *
+* *
+* Description : Lit un nombre non signé sur deux octets. *
+* *
+* Retour : Bilan de l'opération : true en cas de succès, false sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool read_u16(uint16_t *target, const uint8_t *data, off_t *pos, off_t len, SourceEndian endian)
+{
+ if ((len - *pos) < 2) return false;
+
+ switch (endian)
+ {
+
+
+
+ case SRE_BIG:
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+
+ *target = data[*pos + 1] | (uint16_t)data[*pos] << 8;
+
+#elif __BYTE_ORDER == __BIG_ENDIAN
+
+ *target = data[*pos] | (uint16_t)data[*pos + 1] << 8;
+
+#else
+
+# error "TODO : PDP !"
+
+#endif
+
+ break;
+
+
+ }
+
+ *pos += 2;
+
+ return true;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : target = lieu d'enregistrement de la lecture. [OUT] *
+* data = flux de données à analyser. *
+* pos = position courante dans ce flux. [OUT] *
+* len = taille totale des données à analyser. *
+* endian = ordre des bits dans la source. *
+* *
+* Description : Lit un nombre non signé sur quatre octets. *
+* *
+* Retour : Bilan de l'opération : true en cas de succès, false sinon. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool read_u32(uint32_t *target, const uint8_t *data, off_t *pos, off_t len, SourceEndian endian)
+{
+ if ((len - *pos) < 4) return false;
+
+ switch (endian)
+ {
+
+
+
+ case SRE_BIG:
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+
+ *target = data[*pos + 3] | (uint16_t)data[*pos + 2] << 8;
+ *target |= data[*pos + 1] << 16 | (uint16_t)data[*pos] << 24;
+
+#elif __BYTE_ORDER == __BIG_ENDIAN
+
+ *target = data[*pos] | (uint16_t)data[*pos + 1] << 8;
+ *target |= data[*pos + 2] << 16 | (uint16_t)data[*pos + 3] << 24;
+
+#else
+
+# error "TODO : PDP !"
+
+#endif
+
+ break;
+
+
+ }
+
+ *pos += 4;
+
+ return true;
+
+}
diff --git a/src/common/endianness.h b/src/common/endianness.h
new file mode 100755
index 0000000..7ae9575
--- /dev/null
+++ b/src/common/endianness.h
@@ -0,0 +1,54 @@
+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * endianness.h - prototypes pour la manipulation abstraite des nombres
+ *
+ * Copyright (C) 2008 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_ENDIANNESS_H
+#define _COMMON_ENDIANNESS_H
+
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+
+/* Type de boutismes existants */
+typedef enum _SourceEndian
+{
+ SRE_LITTLE, /* Petits boutistes */
+ SRE_BIG, /* Gros boutistes */
+ SRE_MIDDLE /* Moyens boutistes */
+
+} SourceEndian;
+
+
+/* Lit un nombre non signé sur un octet. */
+bool read_u8(uint8_t *, const uint8_t *, off_t *, off_t, SourceEndian );
+
+/* Lit un nombre non signé sur deux octets. */
+bool read_u16(uint16_t *, const uint8_t *, off_t *, off_t, SourceEndian);
+
+/* Lit un nombre non signé sur quatre octets. */
+bool read_u32(uint32_t *, const uint8_t *, off_t *, off_t, SourceEndian);
+
+
+
+#endif /* _COMMON_ENDIANNESS_H */