From 7378f5ddf46ef0317343ad310d703c4f4ff8d703 Mon Sep 17 00:00:00 2001
From: Daniel Brahneborg <basic@chello.se>
Date: Fri, 8 Mar 2002 19:44:37 +0000
Subject: Initial stuff for checking requisites and previous versions.

---
 lib/sisfile.cpp       |  6 ++++++
 lib/sisfile.h         | 13 +++++++++++++
 lib/sisfileheader.cpp | 16 ++++++++++++++++
 lib/sisfileheader.h   |  5 +++++
 lib/sistypes.h        |  6 ++++++
 5 files changed, 46 insertions(+)

(limited to 'lib')

diff --git a/lib/sisfile.cpp b/lib/sisfile.cpp
index ec8adb8..634266f 100644
--- a/lib/sisfile.cpp
+++ b/lib/sisfile.cpp
@@ -27,6 +27,12 @@
 
 #include <stdio.h>
 
+SisRC
+SISFile::compareApp(SISFile* other)
+{
+	return m_header.compareApp(&other->m_header);
+}
+
 SisRC
 SISFile::fillFrom(uint8_t* buf, off_t len)
 {
diff --git a/lib/sisfile.h b/lib/sisfile.h
index cae00ee..2bfcea5 100644
--- a/lib/sisfile.h
+++ b/lib/sisfile.h
@@ -38,6 +38,14 @@ class SISReqRecord;
 class SISFile
 {
 public:
+
+	/**
+	 * Compare uid and version number of this file, with another.
+	 *
+	 * @see SISFileHeader::compareApp()
+	 */
+	SisRC compareApp(SISFile* other);
+
 	/**
 	 * Populate the fields.
 	 *
@@ -62,6 +70,11 @@ public:
 	 */
 	uint8_t* getName();
 
+	/**
+	 * Is this the same application?
+	 */
+	bool sameApp(SISFile* other);
+
 	/**
 	 * Set the installed drive.
 	 */
diff --git a/lib/sisfileheader.cpp b/lib/sisfileheader.cpp
index 19724c3..97e0687 100644
--- a/lib/sisfileheader.cpp
+++ b/lib/sisfileheader.cpp
@@ -28,6 +28,22 @@
 const int OFF_NUMBER_OF_FILES = 26;
 const int OFF_INSTALLATION_DRIVE = 28;
 
+SisRC
+SISFileHeader::compareApp(SISFileHeader* other)
+{
+	if (m_uid1 != other->m_uid1)
+		return SIS_DIFFERENT_APP;
+	if ((m_major < other->m_major) ||
+		((m_major == other->m_major) &&
+		 (m_minor < other->m_minor)))
+		return SIS_VER_EARLIER;
+	if ((m_major == other->m_major) &&
+		(m_minor == other->m_minor) &&
+		(m_variant != other->m_variant))
+		return SIS_OTHER_VARIANT;
+	return SIS_SAME_OR_LATER;
+}
+
 SisRC
 SISFileHeader::fillFrom(uint8_t* buf, int* base, off_t len)
 {
diff --git a/lib/sisfileheader.h b/lib/sisfileheader.h
index 6b5fa3f..0c2d635 100644
--- a/lib/sisfileheader.h
+++ b/lib/sisfileheader.h
@@ -35,6 +35,11 @@ class SISFileHeader
 {
 public:
 
+	/**
+	 * Compare uid and version number of this file, with another.
+	 */
+	SisRC compareApp(SISFileHeader* other);
+
 	/**
 	 * Populate the fields.
 	 *
diff --git a/lib/sistypes.h b/lib/sistypes.h
index 12f237b..a5d008f 100644
--- a/lib/sistypes.h
+++ b/lib/sistypes.h
@@ -32,6 +32,12 @@ enum SisRC {
 	SIS_OK = 0,
 	SIS_TRUNCATED,
 	SIS_CORRUPTED,
+	SIS_FAILED,
+	SIS_ABORTED,
+	SIS_DIFFERENT_APP,
+	SIS_VER_EARLIER,
+	SIS_SAME_OR_LATER,
+	SIS_OTHER_VARIANT,
 };
 
 extern uint16_t read16(uint8_t* p);
-- 
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