From 332faac3f152e14fb43351e82e3be034e72b73b3 Mon Sep 17 00:00:00 2001
From: Joshua Hill
Date: Thu, 20 May 2010 05:46:51 -0400
Subject: Initial commit

---
 src/ipsw.c | 117 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)
 create mode 100644 src/ipsw.c

(limited to 'src/ipsw.c')

diff --git a/src/ipsw.c b/src/ipsw.c
new file mode 100644
index 0000000..d33d95f
--- /dev/null
+++ b/src/ipsw.c
@@ -0,0 +1,117 @@
+/*
+ * ipsw.h
+ * Utilities for extracting and manipulating IPSWs
+ *
+ * Copyright (c) 2010 Joshua Hill. All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <zip.h>
+#include <stdlib.h>
+#include <string.h>
+#include "ipsw.h"
+
+ipsw_archive* ipsw_open(const char* ipsw) {
+	int err = 0;
+	ipsw_archive* archive = (ipsw_archive*) malloc(sizeof(ipsw_archive));
+	if(archive == NULL) {
+		error("ERROR: Out of memory\n");
+		return NULL;
+	}
+
+	archive->zip = zip_open(ipsw, 0, &err);
+	if(archive->zip == NULL) {
+		error("ERROR: zip_open: %s: %d\n", ipsw, err);
+		free(archive);
+		return NULL;
+	}
+
+	return archive;
+}
+
+ipsw_file* ipsw_extract_file(ipsw_archive* archive, const char* filename) {
+	if(archive == NULL || archive->zip == NULL) {
+		error("ERROR: Invalid archive\n");
+		return NULL;
+	}
+
+	int zindex = zip_name_locate(archive->zip, filename, 0);
+	if(zindex < 0) {
+		error("ERROR: zip_name_locate: %s\n", filename);
+		return NULL;
+	}
+
+	struct zip_stat zstat;
+	zip_stat_init(&zstat);
+	if(zip_stat_index(archive->zip, zindex, 0, &zstat) != 0) {
+		error("ERROR: zip_stat_index: %s\n", filename);
+		return NULL;
+	}
+
+	struct zip_file* zfile = zip_fopen_index(archive->zip, zindex, 0);
+	if(zfile == NULL) {
+		error("ERROR: zip_fopen_index: %s\n", filename);
+		return NULL;
+	}
+
+	ipsw_file* file = (ipsw_file*) malloc(sizeof(ipsw_file));
+	if(file == NULL) {
+		error("ERROR: Out of memory\n");
+		zip_fclose(zfile);
+		return NULL;
+	}
+
+	file->size = zstat.size;
+	file->index = zstat.index;
+	file->name = strdup(zstat.name);
+	file->data = (unsigned char*) malloc(file->size);
+	if(file->data == NULL) {
+		error("ERROR: Out of memory\n");
+		ipsw_free_file(file);
+		zip_fclose(zfile);
+		return NULL;
+	}
+
+	if(zip_fread(zfile, file->data, file->size) != file->size) {
+		error("ERROR: zip_fread: %s\n", filename);
+		ipsw_free_file(file);
+		zip_fclose(zfile);
+		return NULL;
+	}
+
+	zip_fclose(zfile);
+	return file;
+}
+
+void ipsw_free_file(ipsw_file* file) {
+	if(file != NULL) {
+		if(file->name != NULL) {
+			free(file->name);
+		}
+		if(file->data != NULL) {
+			free(file->data);
+		}
+		free(file);
+	}
+}
+
+void ipsw_close(ipsw_archive* archive) {
+	if(archive != NULL) {
+		zip_unchange_all(archive->zip);
+		zip_close(archive->zip);
+		free(archive);
+	}
+}
-- 
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