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-rw-r--r--.gitignore3
-rw-r--r--.gitmodules3
-rw-r--r--CMakeLists.txt26
-rw-r--r--conf.d/cmake/config.cmake204
-rw-r--r--htdocs/nfc/AFB-websock.js174
-rw-r--r--htdocs/nfc/binding-debug.css61
-rw-r--r--htdocs/nfc/index.html31
-rw-r--r--htdocs/nfc/nfc-binding.js156
-rw-r--r--src/CMakeLists.txt44
-rw-r--r--src/api.c63
-rw-r--r--src/libnfc_reader.c366
-rw-r--r--src/libnfc_reader.h12
-rw-r--r--src/nfc-binding.c113
-rw-r--r--src/nfc-binding.h17
-rw-r--r--src/stringutils.h41
15 files changed, 1314 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
index c6127b3..ac56bab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -50,3 +50,6 @@ modules.order
Module.symvers
Mkfile.old
dkms.conf
+
+# app-templates submodule
+app-templates/
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e07cae1
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "conf.d/app-templates"]
+ path = conf.d/app-templates
+ url = https://gerrit.automotivelinux.org/gerrit/p/apps/app-templates.git
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..cb875ab
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,26 @@
+###########################################################################
+# Copyright 2015, 2016, 2017 IoT.bzh
+#
+# author: Loïc Collignon <loic.collignon@iot.bzh>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###########################################################################
+
+CMAKE_MINIMUM_REQUIRED(VERSION 3.3)
+
+option(USE_LIBNFC "Enable or disable the 'libnfc' usage." ON)
+
+include(${CMAKE_CURRENT_SOURCE_DIR}/conf.d/cmake/config.cmake)
+
+install(DIRECTORY htdocs/nfc DESTINATION htdocs)
+install(DIRECTORY etc DESTINATION ./)
diff --git a/conf.d/cmake/config.cmake b/conf.d/cmake/config.cmake
new file mode 100644
index 0000000..b9e60d9
--- /dev/null
+++ b/conf.d/cmake/config.cmake
@@ -0,0 +1,204 @@
+###########################################################################
+# Copyright 2015, 2016, 2017 IoT.bzh
+#
+# author: Fulup Ar Foll <fulup@iot.bzh>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###########################################################################
+
+# Project Info
+# ------------------
+set(PROJECT_NAME nfc-binding)
+set(PROJECT_VERSION "0.1")
+set(PROJECT_PRETTY_NAME "NFC Binding")
+set(PROJECT_DESCRIPTION "Abstract NFC readers.")
+set(PROJECT_URL "https://gerrit.automotivelinux.org/gerrit/apps/app-templates")
+set(PROJECT_ICON "icon.png")
+set(PROJECT_AUTHOR "Collignon, Loïc")
+set(PROJECT_AUTHOR_MAIL "loic.collignon@iot.bzh")
+set(PROJECT_LICENSE "APL2.0")
+set(PROJECT_LANGUAGES,"C")
+
+# Where are stored default templates files from submodule or subtree app-templates in your project tree
+# relative to the root project directory
+set(PROJECT_APP_TEMPLATES_DIR "conf.d/app-templates")
+
+# Where are stored your external libraries for your project. This is 3rd party library that you don't maintain
+# but used and must be built and linked.
+# set(PROJECT_LIBDIR "libs")
+
+# Where are stored data for your application. Pictures, static resources must be placed in that folder.
+# set(PROJECT_RESOURCES "data")
+
+# Which directories inspect to find CMakeLists.txt target files
+# set(PROJECT_SRC_DIR_PATTERN "*")
+
+# Compilation Mode (DEBUG, RELEASE)
+# ----------------------------------
+set(CMAKE_BUILD_TYPE "DEBUG")
+set(USE_EFENCE 1)
+
+# Kernel selection if needed. You can choose between a
+# mandatory version to impose a minimal version.
+# Or check Kernel minimal version and just print a Warning
+# about missing features and define a preprocessor variable
+# to be used as preprocessor condition in code to disable
+# incompatibles features. Preprocessor define is named
+# KERNEL_MINIMAL_VERSION_OK.
+#
+# NOTE*** FOR NOW IT CHECKS KERNEL Yocto environment and
+# Yocto SDK Kernel version.
+# -----------------------------------------------
+#set (kernel_mandatory_version 4.8)
+#set (kernel_minimal_version 4.8)
+
+# Compiler selection if needed. Impose a minimal version.
+# -----------------------------------------------
+set (gcc_minimal_version 4.9)
+
+# PKG_CONFIG required packages
+# -----------------------------
+set (PKG_REQUIRED_LIST
+ json-c
+ libsystemd>=222
+ afb-daemon
+ libmicrohttpd>=0.9.55
+)
+
+# Prefix path where will be installed the files
+# Default: /usr/local (need root permission to write in)
+# ------------------------------------------------------
+#set(CMAKE_INSTALL_PREFIX $ENV{HOME}/opt)
+
+# Customize link option
+# -----------------------------
+list(APPEND link_libraries -lnfc)
+
+# Compilation options definition
+# Use CMake generator expressions to specify only for a specific language
+# Values are prefilled with default options that is currently used.
+# Either separate options with ";", or each options must be quoted separately
+# DO NOT PUT ALL OPTION QUOTED AT ONCE , COMPILATION COULD FAILED !
+# ----------------------------------------------------------------------------
+#set(COMPILE_OPTIONS
+# -Wall
+# -Wextra
+# -Wconversion
+# -Wno-unused-parameter
+# -Wno-sign-compare
+# -Wno-sign-conversion
+# -Werror=maybe-uninitialized
+# -Werror=implicit-function-declaration
+# -ffunction-sections
+# -fdata-sections
+# -fPIC
+# CACHE STRING "Compilation flags")
+#set(C_COMPILE_OPTIONS "" CACHE STRING "Compilation flags for C language.")
+#set(CXX_COMPILE_OPTIONS "" CACHE STRING "Compilation flags for C++ language.")
+#set(PROFILING_COMPILE_OPTIONS
+# -g
+# -O0
+# -pg
+# -Wp,-U_FORTIFY_SOURCE
+# CACHE STRING "Compilation flags for PROFILING build type.")
+#set(DEBUG_COMPILE_OPTIONS
+# -g
+# -ggdb
+# -Wp,-U_FORTIFY_SOURCE
+# CACHE STRING "Compilation flags for DEBUG build type.")
+#set(CCOV_COMPILE_OPTIONS
+# -g
+# -O2
+# --coverage
+# CACHE STRING "Compilation flags for CCOV build type.")
+#set(RELEASE_COMPILE_OPTIONS
+# -g
+# -O2
+# CACHE STRING "Compilation flags for RELEASE build type.")
+
+# (BUG!!!) as PKG_CONFIG_PATH does not work [should be an env variable]
+# ---------------------------------------------------------------------
+set(CMAKE_PREFIX_PATH ${CMAKE_INSTALL_PREFIX}/lib64/pkgconfig ${CMAKE_INSTALL_PREFIX}/lib/pkgconfig)
+set(LD_LIBRARY_PATH ${CMAKE_INSTALL_PREFIX}/lib64 ${CMAKE_INSTALL_PREFIX}/lib)
+
+# Optional location for config.xml.in
+# -----------------------------------
+#set(WIDGET_ICON conf.d/wgt/${PROJECT_ICON} CACHE PATH "Path to the widget icon")
+#set(WIDGET_CONFIG_TEMPLATE ${CMAKE_CURRENT_SOURCE_DIR}/conf.d/wgt/config.xml.in CACHE PATH "Path to widget config file template (config.xml.in)")
+
+# Mandatory widget Mimetype specification of the main unit
+# --------------------------------------------------------------------------
+# Choose between :
+#- text/html : HTML application,
+# content.src designates the home page of the application
+#
+#- application/vnd.agl.native : AGL compatible native,
+# content.src designates the relative path of the binary.
+#
+# - application/vnd.agl.service: AGL service, content.src is not used.
+#
+#- ***application/x-executable***: Native application,
+# content.src designates the relative path of the binary.
+# For such application, only security setup is made.
+#
+set(WIDGET_TYPE MimeType_Not_Set)
+
+# Mandatory Widget entry point file of the main unit
+# --------------------------------------------------------------
+# This is the file that will be executed, loaded,
+# at launch time by the application framework.
+#
+set(WIDGET_ENTRY_POINT EntryPoint_Path_Not_Set)
+
+# Optional dependencies order
+# ---------------------------
+#set(EXTRA_DEPENDENCIES_ORDER)
+
+# Optional Extra global include path
+# -----------------------------------
+#set(EXTRA_INCLUDE_DIRS)
+
+# Optional extra libraries
+# -------------------------
+#set(EXTRA_LINK_LIBRARIES)
+
+# Optional force binding Linking flag
+# ------------------------------------
+# set(BINDINGS_LINK_FLAG LinkOptions )
+
+# Optional force package prefix generation, like widget
+# -----------------------------------------------------
+# set(PKG_PREFIX DestinationPath)
+
+# Optional Application Framework security token
+# and port use for remote debugging.
+#------------------------------------------------------------
+set(AFB_TOKEN "" CACHE PATH "Default binder security token")
+set(AFB_REMPORT "1234" CACHE PATH "Default binder listening port")
+
+# Print a helper message when every thing is finished
+# ----------------------------------------------------
+set(CLOSING_MESSAGE "Typical binding launch: afb-daemon --port=${AFB_REMPORT} --workdir=${CMAKE_BINARY_DIR}/package --ldpaths=lib --roothttp=htdocs --token=\"${AFB_TOKEN}\" --tracereq=common --verbose")
+set(PACKAGE_MESSAGE "Install widget file using in the target : afm-util install ${PROJECT_NAME}.wgt")
+
+# Optional schema validator about now only XML, LUA and JSON
+# are supported
+#------------------------------------------------------------
+#set(LUA_CHECKER "luac" "-p" CACHE STRING "LUA compiler")
+#set(XML_CHECKER "xmllint" CACHE STRING "XML linter")
+#set(JSON_CHECKER "json_verify" CACHE STRING "JSON linter")
+
+# This include is mandatory and MUST happens at the end
+# of this file, else you expose you to unexpected behavior
+# -----------------------------------------------------------
+include(${PROJECT_APP_TEMPLATES_DIR}/cmake/common.cmake)
diff --git a/htdocs/nfc/AFB-websock.js b/htdocs/nfc/AFB-websock.js
new file mode 100644
index 0000000..08a7ffe
--- /dev/null
+++ b/htdocs/nfc/AFB-websock.js
@@ -0,0 +1,174 @@
+AFB = function(base, initialtoken){
+
+var urlws = "ws://"+window.location.host+"/"+base;
+var urlhttp = "http://"+window.location.host+"/"+base;
+
+/*********************************************/
+/**** ****/
+/**** AFB_context ****/
+/**** ****/
+/*********************************************/
+var AFB_context;
+{
+ var UUID = undefined;
+ var TOKEN = initialtoken;
+
+ var context = function(token, uuid) {
+ this.token = token;
+ this.uuid = uuid;
+ }
+
+ context.prototype = {
+ get token() {return TOKEN;},
+ set token(tok) {if(tok) TOKEN=tok;},
+ get uuid() {return UUID;},
+ set uuid(id) {if(id) UUID=id;}
+ };
+
+ AFB_context = new context();
+}
+/*********************************************/
+/**** ****/
+/**** AFB_websocket ****/
+/**** ****/
+/*********************************************/
+var AFB_websocket;
+{
+ var CALL = 2;
+ var RETOK = 3;
+ var RETERR = 4;
+ var EVENT = 5;
+
+ var PROTO1 = "x-afb-ws-json1";
+
+ AFB_websocket = function(onopen, onabort) {
+ var u = urlws;
+ if (AFB_context.token) {
+ u = u + '?x-afb-token=' + AFB_context.token;
+ if (AFB_context.uuid)
+ u = u + '&x-afb-uuid=' + AFB_context.uuid;
+ }
+ this.ws = new WebSocket(u, [ PROTO1 ]);
+ this.pendings = {};
+ this.awaitens = {};
+ this.counter = 0;
+ this.ws.onopen = onopen.bind(this);
+ this.ws.onerror = onerror.bind(this);
+ this.ws.onclose = onclose.bind(this);
+ this.ws.onmessage = onmessage.bind(this);
+ this.onopen = onopen;
+ this.onabort = onabort;
+ this.onclose = onabort;
+ }
+
+ function onerror(event) {
+ var f = this.onabort;
+ if (f) {
+ delete this.onopen;
+ delete this.onabort;
+ f && f(this);
+ }
+ this.onerror && this.onerror(this);
+ }
+
+ function onopen(event) {
+ var f = this.onopen;
+ delete this.onopen;
+ delete this.onabort;
+ f && f(this);
+ }
+
+ function onclose(event) {
+ for (var id in this.pendings) {
+ var ferr = this.pendings[id].onerror;
+ ferr && ferr(null, this);
+ }
+ this.pendings = {};
+ this.onclose && this.onclose();
+ }
+
+ function fire(awaitens, name, data) {
+ var a = awaitens[name];
+ if (a)
+ a.forEach(function(handler){handler(data);});
+ var i = name.indexOf("/");
+ if (i >= 0) {
+ a = awaitens[name.substring(0,i)];
+ if (a)
+ a.forEach(function(handler){handler(data);});
+ }
+ a = awaitens["*"];
+ if (a)
+ a.forEach(function(handler){handler(data);});
+ }
+
+ function reply(pendings, id, ans, offset) {
+ if (id in pendings) {
+ var p = pendings[id];
+ delete pendings[id];
+ var f = p[offset];
+ f(ans);
+ }
+ }
+
+ function onmessage(event) {
+ var obj = JSON.parse(event.data);
+ var code = obj[0];
+ var id = obj[1];
+ var ans = obj[2];
+ AFB_context.token = obj[3];
+ switch (code) {
+ case RETOK:
+ reply(this.pendings, id, ans, 0);
+ break;
+ case RETERR:
+ reply(this.pendings, id, ans, 1);
+ break;
+ case EVENT:
+ default:
+ fire(this.awaitens, id, ans);
+ break;
+ }
+ }
+
+ function close() {
+ this.ws.close();
+ this.onabort();
+ }
+
+ function call(method, request) {
+ return new Promise((function(resolve, reject){
+ var id, arr;
+ do {
+ id = String(this.counter = 4095 & (this.counter + 1));
+ } while (id in this.pendings);
+ this.pendings[id] = [ resolve, reject ];
+ arr = [CALL, id, method, request ];
+ if (AFB_context.token) arr.push(AFB_context.token);
+ this.ws.send(JSON.stringify(arr));
+ }).bind(this));
+ }
+
+ function onevent(name, handler) {
+ var id = name;
+ var list = this.awaitens[id] || (this.awaitens[id] = []);
+ list.push(handler);
+ }
+
+ AFB_websocket.prototype = {
+ close: close,
+ call: call,
+ onevent: onevent
+ };
+}
+/*********************************************/
+/**** ****/
+/**** ****/
+/**** ****/
+/*********************************************/
+return {
+ context: AFB_context,
+ ws: AFB_websocket
+};
+};
+
diff --git a/htdocs/nfc/binding-debug.css b/htdocs/nfc/binding-debug.css
new file mode 100644
index 0000000..f41c940
--- /dev/null
+++ b/htdocs/nfc/binding-debug.css
@@ -0,0 +1,61 @@
+#debug-panel {
+ float: right;
+}
+
+#debug-panel.collapsed {
+ background-color: transparent;
+ overflow-x: hidden;
+}
+
+#debug-panel.expanded {
+ background-color: lightyellow;
+ max-width: 25%;
+ overflow-x: scroll;
+}
+
+#debug-panel.collapsed > #debug-panel-collapse {
+ display: none;
+}
+
+#debug-panel.expanded > #debug-panel-collapse {
+ display: block;
+}
+
+#debug-panel.collapsed > #debug-panel-expand {
+ display: block;
+}
+
+#debug-panel.expanded > #debug-panel-expand {
+ display: none;
+}
+
+#debug-panel.expanded > #debug-panel-content {
+ display: block;
+}
+
+#debug-panel.collapsed > #debug-panel-content {
+ display: none;
+}
+
+.json-key {
+ color: cornflowerblue;
+ font-weight: bold;
+}
+
+.json-string {
+ color: crimson;
+}
+
+.json-number {
+ color: sandybrown;
+}
+
+.json-boolean {
+ color: fuchsia;
+ font-weight: bold;
+}
+
+.json-null {
+ color: black;
+ font-weight: bold;
+}
diff --git a/htdocs/nfc/index.html b/htdocs/nfc/index.html
new file mode 100644
index 0000000..999dc0d
--- /dev/null
+++ b/htdocs/nfc/index.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<html>
+ <head>
+ <title>nfc-binding</title>
+ <meta charset="UTF-8">
+
+ <!--
+ <link rel="stylesheet" type="text/css" href="prettify.css">
+ <script type="text/javascript" src="prettify.js"></script>
+ -->
+
+ <script type="text/javascript" src="AFB-websock.js"></script>
+ <script type="text/javascript" src="nfc-binding.js"></script>
+ <link rel="stylesheet" type="text/css" href="binding-debug.css" />
+ </head>
+
+ <body onload="init();" id="app-body">
+ <div id="debug-panel-container"></div>
+ <h1>hl-persistence-binding</h1>
+ <p>
+ <ul>
+ <li><button onclick="subscribe();">Subscribe</button></li>
+ <li><button onclick="unsubscribe();">Unsubscribe</button></li>
+ <li><button onclick="list_devices();">list-devices</button></li>
+ <li><button onclick="list_devices_capabilities();">list-device-capabilities</button></li>
+ <li><button onclick="start_polling();">start-polling</button></li>
+ <li><button onclick="stop_polling();">stop-polling</button></li>
+ </ul>
+ </p>
+ </body>
+</html>
diff --git a/htdocs/nfc/nfc-binding.js b/htdocs/nfc/nfc-binding.js
new file mode 100644
index 0000000..375d036
--- /dev/null
+++ b/htdocs/nfc/nfc-binding.js
@@ -0,0 +1,156 @@
+var afb = new AFB("api", "mysecret");
+var ws;
+
+function add_debbug_panel() {
+
+ if (document.getElementById("debug-panel"))
+ return;
+
+ var itm = document.getElementById("debug-panel-container");
+ if (itm)
+ {
+ var pnl =
+ "<div id=\"debug-panel\" class=\"expanded\">\n" +
+ " <button id=\"debug-panel-collapse\" onclick=\"debug_panel_collapse();\">&gt;</button>\n" +
+ " <button id=\"debug-panel-expand\" onclick=\"debug_panel_expand();\">&lt;</button>\n" +
+ " <div id=\"debug-panel-content\">\n" +
+ " <h1>Debug</h1>\n" +
+ " <h2>Call</h2><div id=\"debug-panel-call\">\n" +
+ " <ul>\n" +
+ " <li><strong>api : </strong><span id=\"debug-panel-call-id\"></span></li>\n" +
+ " <li><strong>verb : </strong><span id=\"debug-panel-call-verb\"></span></li>\n" +
+ " <li><strong>query : </strong></li>\n" +
+ " </ul>\n" +
+ " <pre id=\"debug-panel-call-query\"></pre>\n" +
+ " </div>\n" +
+ " <h2>Response</h2><pre id=\"debug-panel-response\"></pre>\n" +
+ " <h2>Event</h2><pre id=\"debug-panel-event\"></pre>\n" +
+ " </div>\n" +
+ "</div>\n";
+ itm.insertAdjacentHTML("afterbegin", pnl);
+ }
+}
+
+function createClass(name,rules) {
+ var style = document.createElement('style');
+ style.type = 'text/css';
+ document.getElementsByTagName('head')[0].appendChild(style);
+ if(!(style.sheet||{}).insertRule)
+ (style.styleSheet || style.sheet).addRule(name, rules);
+ else
+ style.sheet.insertRule(name+"{"+rules+"}",0);
+}
+
+function syntaxHighlight(json) {
+ if (typeof json != 'string')
+ json = JSON.stringify(json, undefined, 2);
+
+ json = json.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
+ return json.replace(/("(\\u[a-zA-Z0-9]{4}|\\[^u]|[^\\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g, function (match) {
+ var cls = 'json-number';
+ if (/^"/.test(match)) {
+ if (/:$/.test(match)) {
+ cls = 'json-key';
+ } else {
+ cls = 'json-string';
+ }
+ } else if (/true|false/.test(match)) {
+ cls = 'json-boolean';
+ } else if (/null/.test(match)) {
+ cls = 'json-null';
+ }
+ return '<span class="' + cls + '">' + match + '</span>';
+ });
+}
+
+function set_item_html(id, text)
+{
+ var itm = document.getElementById(id);
+ if (itm) itm.innerHTML = text;
+}
+
+function set_item_text(id, text)
+{
+ var itm = document.getElementById(id);
+ if (itm) itm.innerText = text;
+}
+
+function debug_panel_collapse() {
+ var pnl = document.getElementById('debug-panel');
+ if (pnl)
+ {
+ pnl.classList.remove('expanded');
+ pnl.classList.add('collapsed');
+ }
+}
+
+function debug_panel_expand() {
+ var pnl = document.getElementById('debug-panel');
+ if (pnl)
+ {
+ pnl.classList.remove('collapsed');
+ pnl.classList.add('expanded');
+ }
+}
+
+function init() {
+ add_debbug_panel();
+ ws = new afb.ws(onopen, onabort);
+}
+
+function onopen() {
+ //callbinder("ll-auth", "getuser", "");
+ ws.onevent("*", gotevent);
+}
+
+function onabort() {
+}
+
+function replyok(obj) {
+ console.log("replyok:" + JSON.stringify(obj));
+ set_item_html("debug-panel-response", syntaxHighlight(JSON.stringify(obj, null, 4)));
+}
+
+function replyerr(obj) {
+ console.log("replyerr:" + JSON.stringify(obj));
+ set_item_html("debug-panel-response", syntaxHighlight(JSON.stringify(obj, null, 4)));
+}
+
+function gotevent(obj) {
+ console.log("gotevent:" + JSON.stringify(obj));
+ set_item_html("debug-panel-event", syntaxHighlight(JSON.stringify(obj, null, 4)));
+}
+
+function callbinder(api, verb, query) {
+ console.log ("subscribe api="+api+" verb="+verb+" query=" +query);
+
+ set_item_text("debug-panel-call-api", api);
+ set_item_text("debug-panel-call-verb", verb);
+ set_item_html("debug-panel-call-query", syntaxHighlight(JSON.stringify(query, null, 4)));
+
+ ws.call(api+"/"+verb, query).then(replyok, replyerr);
+}
+
+function subscribe() {
+ callbinder("nfc", "subscribe", {});
+}
+
+function unsubscribe() {
+ callbinder("nfc", "unsubscribe", {});
+}
+
+function list_devices() {
+ callbinder("nfc", "list-devices", {});
+}
+
+function list_devices_capabilities() {
+ callbinder("nfc", "list-devices-capabilities", {});
+}
+
+function start_polling() {
+ callbinder("nfc", "start-polling", {});
+}
+
+function stop_polling() {
+ callbinder("nfc", "stop-polling", {});
+}
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
new file mode 100644
index 0000000..0c9021c
--- /dev/null
+++ b/src/CMakeLists.txt
@@ -0,0 +1,44 @@
+###########################################################################
+# Copyright 2015, 2016, 2017 IoT.bzh
+#
+# author: Loïc Collignon <loic.collignon@iot.bzh>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###########################################################################
+
+CMAKE_MINIMUM_REQUIRED(VERSION 3.3)
+
+PROJECT_TARGET_ADD(nfc-binding)
+
+set(NFC_BINDING_SOURCES api.c nfc-binding.c)
+
+if (USE_LIBNFC)
+ set(NFC_BINDING_SOURCES ${NFC_BINDING_SOURCES} libnfc_reader.c)
+ add_definitions(-DUSE_LIBNFC=1)
+endif()
+message(STATUS "libnfc enabled: ${USE_LIBNFC}")
+
+add_library(${TARGET_NAME} MODULE ${NFC_BINDING_SOURCES})
+target_link_libraries(${TARGET_NAME} ${link_libraries})
+
+add_custom_command(TARGET ${TARGET_NAME}
+ PRE_BUILD
+ COMMAND mkdir -p ${CMAKE_CURRENT_BINARY_DIR}/../package/htdocs
+ COMMAND cp -rv ${CMAKE_CURRENT_SOURCE_DIR}/../htdocs ${CMAKE_CURRENT_BINARY_DIR}/../package/)
+
+SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES
+ PREFIX "afb-"
+ LABELS "BINDING"
+ LINK_FLAGS ${BINDINGS_LINK_FLAG}
+ OUTPUT_NAME ${TARGET_NAME})
+
diff --git a/src/api.c b/src/api.c
new file mode 100644
index 0000000..e508e86
--- /dev/null
+++ b/src/api.c
@@ -0,0 +1,63 @@
+#include "nfc-binding.h"
+
+/*
+static const struct afb_auth nfc_auths[] = {
+};
+*/
+
+static const struct afb_verb_v2 nfc_verbs[] = {
+ {
+ .verb = "subscribe",
+ .callback = verb_subscribe,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ {
+ .verb = "unsubscribe",
+ .callback = verb_unsubscribe,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ {
+ .verb = "list-devices",
+ .callback = verb_list_devices,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ {
+ .verb = "list-devices-capabilities",
+ .callback = verb_list_devices_capabilities,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ {
+ .verb = "start-polling",
+ .callback = verb_start_polling,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ {
+ .verb = "stop-polling",
+ .callback = verb_stop_polling,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ { .verb = NULL }
+};
+
+const struct afb_binding afbBindingV2 = {
+ .api = "nfc",
+ .specification = NULL,
+ .info = NULL,
+ .verbs = nfc_verbs,
+ .preinit = NULL,
+ .init = init,
+ .onevent = NULL,
+ .noconcurrency = 0
+};
diff --git a/src/libnfc_reader.c b/src/libnfc_reader.c
new file mode 100644
index 0000000..8b11f0c
--- /dev/null
+++ b/src/libnfc_reader.c
@@ -0,0 +1,366 @@
+#include "nfc-binding.h"
+
+#include <string.h>
+#include <sys/types.h>
+#include <pthread.h>
+
+// FIXME: It compile without these lines, but KDevelop complains about pthread_t being undeclared.
+#ifndef _BITS_PTHREADTYPES
+typedef unsigned long int pthread_t;
+#endif
+
+#include <nfc/nfc.h>
+#include "libnfc_reader.h"
+#include "stringutils.h"
+
+extern struct afb_event on_nfc_read_event;
+
+#define MAX_NFC_DEVICE_COUNT 8
+#define MAX_NFC_MODULATIONS 8
+#define MAX_NFC_BAUDRATES 8
+#define POLL_NUMBER 0xff
+#define POLL_PERIOD 0x05
+
+typedef struct libnfc_device_tag
+{
+ pthread_t poller;
+ nfc_device* device;
+ nfc_connstring name;
+
+ nfc_modulation* modulations;
+ size_t modulations_count;
+} libnfc_device;
+
+typedef struct libnfc_context_tag
+{
+ nfc_context* context;
+ libnfc_device* devices;
+ size_t devices_count;
+} libnfc_context;
+
+static libnfc_context libnfc = {
+ .context = NULL,
+ .devices = NULL,
+ .devices_count = 0
+};
+
+void libnfc_polling_error(int code)
+{
+ switch(code)
+ {
+ case NFC_EIO:
+ AFB_ERROR("libnfc: polling failed with NFC_EIO (%d) code: Input / output error, device may not be usable anymore without re-open it!", code);
+ break;
+ case NFC_EINVARG:
+ AFB_ERROR("libnfc: polling failed with NFC_EINVARG (%d) code: Invalid argument(s)!", code);
+ break;
+ case NFC_EDEVNOTSUPP:
+ AFB_ERROR("libnfc: polling failed with NFC_EDEVNOTSUPP (%d) code: Operation not supported by device!", code);
+ break;
+ case NFC_ENOTSUCHDEV:
+ AFB_ERROR("libnfc: polling failed with NFC_ENOTSUCHDEV (%d) code: No such device!", code);
+ break;
+ case NFC_EOVFLOW:
+ AFB_ERROR("libnfc: polling failed with NFC_EOVFLOW (%d) code: Buffer overflow!", code);
+ break;
+ case NFC_ETIMEOUT:
+ AFB_ERROR("libnfc: polling failed with NFC_ETIMEOUT (%d) code: Operation timed out!", code);
+ break;
+ case NFC_EOPABORTED:
+ AFB_ERROR("libnfc: polling failed with NFC_EOPABORTED (%d) code: Operation aborted (by user)!", code);
+ break;
+ case NFC_ENOTIMPL:
+ AFB_ERROR("libnfc: polling failed with NFC_ENOTIMPL (%d) code: Not (yet) implemented!", code);
+ break;
+ case NFC_ETGRELEASED:
+ AFB_ERROR("libnfc: polling failed with NFC_ETGRELEASED (%d) code: Target released!", code);
+ break;
+ case NFC_ERFTRANS:
+ AFB_ERROR("libnfc: polling failed with NFC_ERFTRANS (%d) code: Error while RF transmission!", code);
+ break;
+ case NFC_EMFCAUTHFAIL:
+ AFB_ERROR("libnfc: polling failed with NFC_EMFCAUTHFAIL (%d) code: MIFARE Classic: authentication failed!", code);
+ break;
+ case NFC_ESOFT:
+ AFB_ERROR("libnfc: polling failed with NFC_ESOFT (%d) code: Software error (allocation, file/pipe creation, etc.)!", code);
+ break;
+ case NFC_ECHIP:
+ AFB_ERROR("libnfc: polling failed with NFC_ECHIP (%d) code: Device's internal chip error!", code);
+ break;
+ default:
+ AFB_ERROR("libnfc: polling failed with unknown code: %d!", code);
+ break;
+ }
+}
+
+void* libnfc_reader_main(void* arg)
+{
+ libnfc_device* device;
+ nfc_target nt;
+ int polled_target_count;
+
+ // Read datas
+ const char* mt;
+ char* field1;
+ char* field2;
+ char* field3;
+ char* field4;
+ struct json_object* result;
+
+ device = (libnfc_device*)arg;
+
+ while(device->device)
+ {
+ polled_target_count = nfc_initiator_poll_target(device->device, device->modulations, device->modulations_count, POLL_NUMBER, POLL_PERIOD, &nt);
+ switch(polled_target_count)
+ {
+ case 0:
+ AFB_INFO("libnfc: polling done with no result.");
+ break;
+
+ case 1:
+ mt = str_nfc_modulation_type(nt.nm.nmt);
+ AFB_NOTICE("libnfc: polling done with one result of type %s.", mt);
+ switch(nt.nm.nmt)
+ {
+ case NMT_ISO14443A:
+ field1 = to_hex_string(nt.nti.nai.abtAtqa, 2);
+ field2 = to_hex_string(&nt.nti.nai.btSak, 1);
+ field3 = to_hex_string(nt.nti.nai.abtUid, nt.nti.nai.szUidLen);
+ field4 = to_hex_string(nt.nti.nai.abtAts, nt.nti.nai.szAtsLen);
+
+ result = json_object_new_object();
+ json_object_object_add(result, "Type", json_object_new_string(mt));
+ if (field1) json_object_object_add(result, "ATQA", json_object_new_string(field1));
+ if (field2) json_object_object_add(result, "SAK", json_object_new_string(field2));
+ if (field3) json_object_object_add(result, "UID", json_object_new_string(field3));
+ if (field4) json_object_object_add(result, "ATS", json_object_new_string(field4));
+
+ break;
+ case NMT_ISO14443B:
+ field1 = to_hex_string(nt.nti.nbi.abtPupi, 4);
+ field2 = to_hex_string(nt.nti.nbi.abtApplicationData, 4);
+ field3 = to_hex_string(nt.nti.nbi.abtProtocolInfo, 3);
+ field4 = to_hex_string(&nt.nti.nbi.ui8CardIdentifier, 1);
+
+ result = json_object_new_object();
+ json_object_object_add(result, "Type", json_object_new_string(mt));
+ if (field1) json_object_object_add(result, "PUPI", json_object_new_string(field1));
+ if (field2) json_object_object_add(result, "Application Data", json_object_new_string(field2));
+ if (field3)json_object_object_add(result, "Protocol Info", json_object_new_string(field3));
+ if (field4)json_object_object_add(result, "Card Id", json_object_new_string(field4));
+
+ break;
+ default:
+ AFB_WARNING("libnfc: unsupported modulation type: %s.", mt);
+ break;
+ }
+
+ if (result)
+ {
+ AFB_NOTICE("libnfc: push tag read event=%s", json_object_to_json_string(result));
+ afb_event_push(on_nfc_read_event, result);
+ }
+ if (field1) free(field1);
+ if (field2) free(field2);
+ if (field3) free(field3);
+ if (field4) free(field4);
+
+ break;
+
+ default:
+ if (polled_target_count < 0)
+ libnfc_polling_error(polled_target_count);
+ else
+ AFB_WARNING("libnfc: polling done with unsupported result count: %d.", polled_target_count);
+ break;
+ }
+ }
+
+ return NULL;
+}
+
+/// @brief Start the libnfc context.
+/// @return An exit code, @c EXIT_LIBNFC_SUCCESS (zero) on success.
+int libnfc_init()
+{
+ nfc_device* dev;
+ nfc_connstring connstrings[MAX_NFC_DEVICE_COUNT];
+ const nfc_modulation_type* modulations;
+ const nfc_baud_rate* baudrates;
+ size_t ref_device_count;
+ size_t device_idx;
+ size_t modulation_idx;
+
+ nfc_init(&libnfc.context);
+ if (libnfc.context == NULL)
+ {
+ AFB_ERROR("[libnfc] Initialization failed (malloc)!");
+ return EXIT_LIBNFC_NOT_INITIALIZED;
+ }
+
+ AFB_NOTICE("[libnfc] Using libnfc version: %s.", nfc_version());
+
+ // Find and register devices
+ ref_device_count = nfc_list_devices(libnfc.context, connstrings, MAX_NFC_DEVICE_COUNT);
+ if (!ref_device_count)
+ {
+ AFB_ERROR("libnfc: No NFC device found!");
+ return EXIT_LIBNFC_NO_DEVICE_FOUND;
+ }
+ libnfc.devices_count = ref_device_count;
+ libnfc.devices = malloc(sizeof(libnfc_device) * libnfc.devices_count);
+ memset(libnfc.devices, 0, sizeof(libnfc_device) * libnfc.devices_count);
+
+ for(device_idx = 0; device_idx < ref_device_count; ++device_idx)
+ {
+ AFB_NOTICE("libnfc: NFC Device found: \"%s\".", connstrings[device_idx]);
+ strcpy(libnfc.devices[device_idx].name, connstrings[device_idx]);
+
+ // Find and register modulations
+ dev = nfc_open(libnfc.context, connstrings[device_idx]);
+ if (dev)
+ {
+ if (nfc_device_get_supported_modulation(dev, N_INITIATOR, &modulations))
+ {
+ AFB_ERROR("libnfc: Failed to get supported modulations from '%s'!", connstrings[device_idx]);
+ }
+ else
+ {
+ // Find and register modulations
+ modulation_idx = 0;
+ while(modulations[modulation_idx]) ++modulation_idx;
+ libnfc.devices[device_idx].modulations_count = modulation_idx;
+ if (modulation_idx)
+ {
+ libnfc.devices[device_idx].modulations = malloc(sizeof(nfc_modulation) * modulation_idx);
+ memset(libnfc.devices[device_idx].modulations, 0, sizeof(nfc_modulation) * modulation_idx);
+
+ modulation_idx = 0;
+ while(modulations[modulation_idx])
+ {
+ libnfc.devices[device_idx].modulations[modulation_idx].nmt = modulations[modulation_idx];
+ if (!nfc_device_get_supported_baud_rate(dev, modulations[modulation_idx], &baudrates))
+ {
+ // Keep only the first speed which is supposed to be the fastest
+ libnfc.devices[device_idx].modulations[modulation_idx].nbr = baudrates[0];
+ }
+
+ AFB_NOTICE("libnfc: - Modulation '%s' supported at '%s'."
+ , str_nfc_modulation_type(libnfc.devices[device_idx].modulations[modulation_idx].nmt)
+ , str_nfc_baud_rate(libnfc.devices[device_idx].modulations[modulation_idx].nbr));
+ ++modulation_idx;
+ }
+ }
+ }
+ nfc_close(dev);
+ }
+ }
+
+ return EXIT_LIBNFC_SUCCESS;
+}
+
+/// @brief List devices founds by libnfc.
+/// @param[in] result A json object array into which found devices are added.
+/// @return An exit code, @c EXIT_LIBNFC_SUCCESS (zero) on success.
+int libnfc_list_devices(struct json_object* result)
+{
+ struct json_object* device;
+ size_t i;
+
+ for(i = 0; i < libnfc.devices_count; ++i)
+ {
+ device = json_object_new_object();
+ json_object_object_add(device, "source", json_object_new_string("libnfc"));
+ json_object_object_add(device, "name", json_object_new_string(libnfc.devices[i].name));
+ json_object_array_add(result, device);
+ }
+
+ return EXIT_LIBNFC_SUCCESS;
+}
+
+int libnfc_list_devices_capabilities(struct json_object* result, struct json_object* devices)
+{
+ struct json_object* device;
+ struct json_object* mods;
+ struct json_object* mod;
+ size_t i, j;
+
+ for(i = 0; i < libnfc.devices_count; ++i)
+ {
+ device = json_object_new_object();
+ json_object_object_add(device, "source", json_object_new_string("libnfc"));
+ json_object_object_add(device, "name", json_object_new_string(libnfc.devices[i].name));
+ mods = json_object_new_array();
+
+ for(j = 0; j < libnfc.devices[i].modulations_count; ++j)
+ {
+ mod = json_object_new_object();
+ json_object_object_add(mod, "modulation", json_object_new_string(str_nfc_modulation_type(libnfc.devices[i].modulations[j].nmt)));
+ json_object_object_add(mod, "baudrate", json_object_new_string(str_nfc_baud_rate(libnfc.devices[i].modulations[j].nbr)));
+ json_object_array_add(mods, mod);
+ }
+
+ json_object_object_add(device, "modulations", mods);
+ json_object_array_add(result, device);
+ }
+
+ return EXIT_LIBNFC_SUCCESS;
+}
+
+int libnfc_start_polling(struct json_object* result, struct json_object* devices)
+{
+ struct json_object* device;
+ size_t i;
+ int r;
+
+ for(i = 0; i < libnfc.devices_count; ++i)
+ {
+ device = json_object_new_object();
+ json_object_object_add(device, "source", json_object_new_string("libnfc"));
+ json_object_object_add(device, "name", json_object_new_string(libnfc.devices[i].name));
+ if (libnfc.devices[i].device)
+ {
+ json_object_object_add(device, "status", json_object_new_string("already polling"));
+ AFB_NOTICE("libnfc: Device '%s' is already polling.", libnfc.devices[i].name);
+ }
+ else
+ {
+ libnfc.devices[i].device = nfc_open(libnfc.context, libnfc.devices[i].name);
+ if (libnfc.devices[i].device)
+ {
+ if (nfc_initiator_init(libnfc.devices[i].device) < 0)
+ {
+ nfc_close(libnfc.devices[i].device);
+ libnfc.devices[i].device = NULL;
+ json_object_object_add(device, "status", json_object_new_string("failed to set initiator mode"));
+ AFB_ERROR("libnfc: nfc_initiator_init failedfor device '%s'!", libnfc.devices[i].name);
+ }
+ else
+ {
+ r = pthread_create(&libnfc.devices[i].poller, NULL, libnfc_reader_main, (void*)&libnfc.devices[i]);
+ if (r)
+ {
+ nfc_close(libnfc.devices[i].device);
+ libnfc.devices[i].device = NULL;
+ json_object_object_add(device, "status", json_object_new_string("failed to create the polling thread"));
+ AFB_ERROR("libnfc: pthread_create failed!");
+ }
+ else
+ {
+ json_object_object_add(device, "status", json_object_new_string("polling"));
+ AFB_NOTICE("libnfc: Polling the device '%s'.", libnfc.devices[i].name);
+ }
+ }
+ }
+ else
+ {
+ json_object_object_add(device, "status", json_object_new_string("failed to open device"));
+ AFB_ERROR("libnfc: Failed to open device '%s'!", libnfc.devices[i].name);
+ }
+ }
+ json_object_array_add(result, device);
+ }
+
+ return EXIT_LIBNFC_SUCCESS;
+}
diff --git a/src/libnfc_reader.h b/src/libnfc_reader.h
new file mode 100644
index 0000000..1209fda
--- /dev/null
+++ b/src/libnfc_reader.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include <json-c/json.h>
+
+#define EXIT_LIBNFC_SUCCESS 0
+#define EXIT_LIBNFC_NOT_INITIALIZED 1
+#define EXIT_LIBNFC_NO_DEVICE_FOUND 2
+
+int libnfc_init();
+int libnfc_list_devices(struct json_object* result);
+int libnfc_list_devices_capabilities(struct json_object* result, struct json_object* devices);
+int libnfc_start_polling(struct json_object* result, struct json_object* devices);
diff --git a/src/nfc-binding.c b/src/nfc-binding.c
new file mode 100644
index 0000000..3d96cbb
--- /dev/null
+++ b/src/nfc-binding.c
@@ -0,0 +1,113 @@
+#include "nfc-binding.h"
+
+#if USE_LIBNFC == 1
+#include "libnfc_reader.h"
+#endif
+
+struct afb_event on_nfc_read_event;
+
+/// @brief Binding's initialization.
+/// @return Exit code, zero on success, non-zero otherwise.
+int init()
+{
+ on_nfc_read_event = afb_daemon_make_event("on-nfc-read");
+ if (!afb_event_is_valid(on_nfc_read_event))
+ {
+ AFB_ERROR("Failed to create a valid event!");
+ return 1;
+ }
+
+#if USE_LIBNFC == 1
+ if (libnfc_init())
+ {
+ AFB_ERROR("Failed start libnfc reader!");
+ return 2;
+ }
+#endif
+
+ return 0;
+}
+
+/// @brief Get a list of devices.
+/// @param[in] req The query.
+void verb_subscribe(struct afb_req req)
+{
+ if (afb_req_subscribe(req, on_nfc_read_event)) afb_req_fail(req, NULL, "Subscription failure!");
+ else afb_req_success(req, NULL, "Subscription success!");
+}
+
+/// @brief Get a list of devices.
+/// @param[in] req The query.
+void verb_unsubscribe(struct afb_req req)
+{
+ if (afb_req_unsubscribe(req, on_nfc_read_event)) afb_req_fail(req, NULL, "Unsubscription failure!");
+ else afb_req_success(req, NULL, "Unsubscription success!");
+}
+
+/// @brief Get a list of devices.
+/// @param[in] req The query.
+void verb_list_devices(struct afb_req req)
+{
+ struct json_object* result;
+
+ result = json_object_new_array();
+
+#if USE_LIBNFC == 1
+ if (libnfc_list_devices(result))
+ {
+ afb_req_fail(req, "Failed to get devices list from libnfc!", NULL);
+ return;
+ }
+#endif
+
+ afb_req_success(req, result, NULL);
+}
+
+/// @brief Get a list of devices capabilities.
+/// @param[in] req The query.
+void verb_list_devices_capabilities(struct afb_req req)
+{
+ struct json_object* result;
+ struct json_object* arg;
+
+ arg = afb_req_json(req);
+
+ result = json_object_new_array();
+
+#if USE_LIBNFC == 1
+ if (libnfc_list_devices_capabilities(result, arg))
+ {
+ afb_req_fail(req, "Failed to get devices list from libnfc!", NULL);
+ return;
+ }
+#endif
+
+ afb_req_success(req, result, NULL);
+}
+
+/// @brief Start polling.
+/// @param[in] req The query.
+void verb_start_polling(struct afb_req req)
+{
+ struct json_object* result;
+ struct json_object* arg;
+
+ arg = afb_req_json(req);
+
+ result = json_object_new_array();
+
+#if USE_LIBNFC == 1
+ if (libnfc_start_polling(result, arg))
+ {
+ afb_req_fail(req, "Failed to get devices list from libnfc!", NULL);
+ return;
+ }
+#endif
+
+ afb_req_success(req, result, NULL);
+}
+
+void verb_stop_polling(struct afb_req req)
+{
+ afb_req_fail(req, "Not implemented yet!", NULL);
+}
diff --git a/src/nfc-binding.h b/src/nfc-binding.h
new file mode 100644
index 0000000..a4fcfb4
--- /dev/null
+++ b/src/nfc-binding.h
@@ -0,0 +1,17 @@
+#pragma once
+
+#include <json-c/json.h>
+
+#define AFB_BINDING_VERSION 2
+#include <afb/afb-binding.h>
+
+// Initializations
+int init();
+
+// Verbs
+void verb_subscribe(struct afb_req req);
+void verb_unsubscribe(struct afb_req req);
+void verb_list_devices(struct afb_req req);
+void verb_list_devices_capabilities(struct afb_req req);
+void verb_start_polling(struct afb_req req);
+void verb_stop_polling(struct afb_req req);
diff --git a/src/stringutils.h b/src/stringutils.h
new file mode 100644
index 0000000..824d09d
--- /dev/null
+++ b/src/stringutils.h
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <stdlib.h>
+
+/**
+ * @brief Get a hexadecimal string representation from memory buffer.
+ * @param[in] src Buffer's pointer.
+ * @param[in] sz Buffer's size.
+ * @return A pointer to the result string. Caller is responsible for the result lifetime.
+ */
+static inline char* to_hex_string(const void* src, long unsigned int sz)
+{
+ static const char lookup[] =
+ {
+ '0', '1', '2', '3',
+ '4', '5', '6', '7',
+ '8', '9', 'a', 'b',
+ 'c', 'd', 'e', 'f'
+ };
+
+ const char* source;
+ char* result;
+ long unsigned int i;
+
+ result = NULL;
+ if (src && sz)
+ {
+ source = (const char*)src;
+ result = (char*)malloc(sz * 2 + 1);
+ if (result)
+ {
+ result[sz * 2] = 0;
+ for (i = 0; i < sz; ++i)
+ {
+ result[i * 2] = lookup[(source[i] & 0xf0) >> 4];
+ result[i * 2 + 1] = lookup[source[i] & 0x0f];
+ }
+ }
+ }
+ return result;
+}