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-rw-r--r--src/common/Makefile.am1
-rw-r--r--src/common/compression.c175
-rw-r--r--src/common/compression.h52
3 files changed, 228 insertions, 0 deletions
diff --git a/src/common/Makefile.am b/src/common/Makefile.am
index b5b008c..7a13aa8 100644
--- a/src/common/Makefile.am
+++ b/src/common/Makefile.am
@@ -6,6 +6,7 @@ libcommon_la_SOURCES = \
asm.h asm.c \
bconst.h \
bits.h bits.c \
+ compression.h compression.c \
cpp.h \
dllist.h dllist.c \
endianness.h endianness.c \
diff --git a/src/common/compression.c b/src/common/compression.c
new file mode 100644
index 0000000..d443924
--- /dev/null
+++ b/src/common/compression.c
@@ -0,0 +1,175 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * compression.c - facilités de manipulation des archives
+ *
+ * Copyright (C) 2018 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide 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.
+ *
+ * Chrysalide 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "compression.h"
+
+
+#include <fcntl.h>
+#include <stdio.h>
+
+
+#include "io.h"
+
+
+
+/* Fixe le tampon pour la lecture des fichiers à inclure */
+#define ARCHIVE_RBUF_SIZE 2048
+
+
+
+/******************************************************************************
+* *
+* Paramètres : output = archive dont le contenu est à composer. *
+* filename = chemin d'accès au fichier d'entrée. *
+* path = chemin d'accès dans l'archive. *
+* *
+* Description : Ajoute un élement à une archive. *
+* *
+* Retour : Code de retour pour l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+CPError add_file_into_archive(struct archive *output, const char *filename, const char *path)
+{
+ CPError result; /* Code de retour à renvoyer */
+ struct stat info; /* Informations d'origine */
+ int ret; /* Bilan d'un appel */
+ struct archive_entry *entry; /* Elément de l'archive */
+ int fd; /* Flux ouvert en lecture */
+ char buffer[ARCHIVE_RBUF_SIZE]; /* Tampon pour les transferts */
+ ssize_t len; /* Quantité de données lues */
+
+ result = CPE_ARCHIVE_ERROR;
+
+ ret = stat(filename, &info);
+ if (ret != 0)
+ {
+ perror("stat");
+ result = CPE_SYSTEM_ERROR;
+ goto afia_exit;
+ }
+
+ entry = archive_entry_new();
+
+ archive_entry_copy_stat(entry, &info);
+ archive_entry_set_pathname(entry, path);
+
+ ret = archive_write_header(output, entry);
+ if (ret != 0) goto afia_exit;
+
+ fd = open(filename, O_RDONLY);
+ if (fd == -1)
+ {
+ perror("open");
+ result = CPE_SYSTEM_ERROR;
+ goto afia_exit;
+ }
+
+ for (len = safe_read_partial(fd, buffer, ARCHIVE_RBUF_SIZE);
+ len > 0;
+ len = safe_read_partial(fd, buffer, ARCHIVE_RBUF_SIZE))
+ {
+ if (archive_write_data(output, buffer, len) != len)
+ goto afia_exit;
+ }
+
+ close(fd);
+
+ archive_entry_free(entry);
+
+ return CPE_NO_ERROR;
+
+ afia_exit:
+
+ archive_entry_free(entry);
+
+ return result;
+
+}
+
+
+/******************************************************************************
+* *
+* Paramètres : intput = archive dont le contenu est à extraire. *
+* entry = entrée de l'archive à extraire. *
+* filename = chemin d'accès au fichier de sortie. *
+* *
+* Description : Extrait un élement d'une archive. *
+* *
+* Retour : Bilan de l'opération. *
+* *
+* Remarques : - *
+* *
+******************************************************************************/
+
+bool dump_archive_entry_into_file(struct archive *input, struct archive_entry *entry, const char *filename)
+{
+ bool result; /* Conclusion à retourner */
+ int flags; /* Propriétés à extraire */
+ struct archive *output; /* Extracteur générique */
+ int ret; /* Bilan d'un appel */
+ const void *buff; /* Tampon de copie */
+ size_t size; /* Quantité copiée */
+ __LA_INT64_T offset; /* Position de lecture */
+
+ result = false;
+
+ archive_entry_set_pathname(entry, filename);
+
+ /* Propriétés à restaurer */
+ flags = ARCHIVE_EXTRACT_TIME;
+ flags |= ARCHIVE_EXTRACT_PERM;
+ flags |= ARCHIVE_EXTRACT_ACL;
+ flags |= ARCHIVE_EXTRACT_FFLAGS;
+
+ output = archive_write_disk_new();
+ archive_write_disk_set_options(output, flags);
+ archive_write_disk_set_standard_lookup(output);
+
+ ret = archive_write_header(output, entry);
+ if (ret != ARCHIVE_OK) goto daeif_exit;
+
+ for (ret = archive_read_data_block(input, &buff, &size, &offset);
+ ret == ARCHIVE_OK;
+ ret = archive_read_data_block(input, &buff, &size, &offset))
+ {
+ ret = archive_write_data_block(output, buff, size, offset);
+ }
+
+ if (ret != ARCHIVE_EOF)
+ goto daeif_exit;
+
+ ret = archive_write_finish_entry(output);
+
+ result = (ret == ARCHIVE_OK);
+
+ daeif_exit:
+
+ archive_write_close(output);
+ archive_write_free(output);
+
+ return result;
+
+}
diff --git a/src/common/compression.h b/src/common/compression.h
new file mode 100644
index 0000000..632147a
--- /dev/null
+++ b/src/common/compression.h
@@ -0,0 +1,52 @@
+
+/* Chrysalide - Outil d'analyse de fichiers binaires
+ * compression.h - prototypes pour les facilités de manipulation des archives
+ *
+ * Copyright (C) 2018 Cyrille Bagard
+ *
+ * This file is part of Chrysalide.
+ *
+ * Chrysalide 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.
+ *
+ * Chrysalide 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 Chrysalide. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _COMMON_COMPRESSION_H
+#define _COMMON_COMPRESSION_H
+
+
+#include <archive.h>
+#include <archive_entry.h>
+#include <stdbool.h>
+
+
+
+/* Codes de retour pour la compression */
+typedef enum _CPError
+{
+ CPE_NO_ERROR, /* Aucun souci particulier */
+ CPE_SYSTEM_ERROR, /* Le soucis vient de l'archive*/
+ CPE_ARCHIVE_ERROR /* Le soucis vient du système */
+
+} CPError;
+
+
+/* Ajoute un élement à une archive. */
+CPError add_file_into_archive(struct archive *, const char *, const char *);
+
+/* Extrait un élement d'une archive. */
+bool dump_archive_entry_into_file(struct archive *, struct archive_entry *, const char *);
+
+
+
+#endif /* _COMMON_COMPRESSION_H */
generated by cgit v0.11.2-87-g4458 at 2024-12-25 06:26:32 (GMT)