From 384eec9bc3cb8c8bc0d9862b6110df017fea874f Mon Sep 17 00:00:00 2001
From: Michael Lotz <mmlr@mlotz.ch>
Date: Tue, 26 Jan 2010 23:34:23 +0000
Subject: [PATCH] Add "hid_decode" which uses the usb_hid HID parser to decode
 a report descriptor (which is conveniently stored by usb_hid to /tmp for each
 device you plug in).

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35306 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 src/bin/Jamfile                   |  1 +
 src/bin/hid_decode/Jamfile        | 23 +++++++++++
 src/bin/hid_decode/UserlandHID.h  |  9 +++++
 src/bin/hid_decode/hid_decode.cpp | 64 +++++++++++++++++++++++++++++++
 4 files changed, 97 insertions(+)
 create mode 100644 src/bin/hid_decode/Jamfile
 create mode 100644 src/bin/hid_decode/UserlandHID.h
 create mode 100644 src/bin/hid_decode/hid_decode.cpp

diff --git a/src/bin/Jamfile b/src/bin/Jamfile
index 355d01ae88..77a45c608b 100644
--- a/src/bin/Jamfile
+++ b/src/bin/Jamfile
@@ -205,6 +205,7 @@ SubInclude HAIKU_TOP src bin fwcontrol ;
 SubInclude HAIKU_TOP src bin gawk ;
 SubInclude HAIKU_TOP src bin gdb ;
 SubInclude HAIKU_TOP src bin grep ;
+SubInclude HAIKU_TOP src bin hid_decode ;
 SubInclude HAIKU_TOP src bin iasl ;
 SubInclude HAIKU_TOP src bin ideinfo ;
 SubInclude HAIKU_TOP src bin keymap ;
diff --git a/src/bin/hid_decode/Jamfile b/src/bin/hid_decode/Jamfile
new file mode 100644
index 0000000000..dfe2abe1ca
--- /dev/null
+++ b/src/bin/hid_decode/Jamfile
@@ -0,0 +1,23 @@
+SubDir HAIKU_TOP src bin hid_decode ;
+
+local defines = [ FDefines USERLAND_HID ] ;
+local driverDir = [ FDirName $(HAIKU_TOP) src add-ons kernel drivers input
+	usb_hid ] ;
+
+SubDirC++Flags $(defines) ;
+
+UsePrivateHeaders drivers ;
+UseHeaders $(driverDir) ;
+
+BinCommand hid_decode :
+	HIDCollection.cpp
+	HIDParser.cpp
+	HIDReport.cpp
+	HIDReportItem.cpp
+
+	hid_decode.cpp
+	: be
+;
+
+SEARCH on [ FGristFiles HIDCollection.cpp HIDParser.cpp HIDReport.cpp
+	HIDReportItem.cpp ] = $(driverDir) ;
diff --git a/src/bin/hid_decode/UserlandHID.h b/src/bin/hid_decode/UserlandHID.h
new file mode 100644
index 0000000000..4962670a3b
--- /dev/null
+++ b/src/bin/hid_decode/UserlandHID.h
@@ -0,0 +1,9 @@
+#ifndef HID_USERLAND_H
+#define HID_USERLAND_H
+
+#include <stdio.h>
+
+#define TRACE(x...)			/*printf(x)*/
+#define TRACE_ALWAYS(x...)	printf(x)
+
+#endif
diff --git a/src/bin/hid_decode/hid_decode.cpp b/src/bin/hid_decode/hid_decode.cpp
new file mode 100644
index 0000000000..1dcb3ff12a
--- /dev/null
+++ b/src/bin/hid_decode/hid_decode.cpp
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2010, Michael Lotz, mmlr@mlotz.ch.
+ * Distributed under the terms of the MIT License.
+ */
+
+#include "HIDCollection.h"
+#include "HIDParser.h"
+#include "HIDReport.h"
+
+#include <File.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+int
+main(int argc, char *argv[])
+{
+	if (argc < 2) {
+		printf("usage: %s <hid_descriptor_file>\n", argv[0]);
+		return 1;
+	}
+
+	BFile file(argv[1], B_READ_ONLY);
+	if (!file.IsReadable()) {
+		printf("can't open file \"%s\" for reading\n", argv[1]);
+		return 2;
+	}
+
+	off_t descriptorLength;
+	file.GetSize(&descriptorLength);
+
+	uint8 *reportDescriptor = (uint8 *)malloc(descriptorLength);
+	if (reportDescriptor == NULL) {
+		printf("failed to allocate buffer of %lld bytes\n", descriptorLength);
+		return 3;
+	}
+
+	ssize_t read = file.Read(reportDescriptor, descriptorLength);
+	if (read != descriptorLength) {
+		printf("failed to read file of %lld bytes: %s\n", descriptorLength,
+			strerror(read));
+		return 4;
+	}
+
+	HIDParser parser(NULL);
+	status_t result = parser.ParseReportDescriptor(reportDescriptor,
+		descriptorLength);
+
+	free(reportDescriptor);
+	if (result != B_OK) {
+		printf("failed to parse descriptor: %s\n", strerror(result));
+		return 5;
+	}
+
+	for (uint32 i = 0; i < parser.CountReports(HID_REPORT_TYPE_ANY); i++)
+		parser.ReportAt(HID_REPORT_TYPE_ANY, i)->PrintToStream();
+
+	if (parser.RootCollection() != NULL)
+		parser.RootCollection()->PrintToStream();
+
+	return 0;
+}