[Done] Implemented chip state management

lib/chip/source/state.php

@@ -0,0 +1,101 @@
+#!/usr/bin/php
+
+<?php
+
+	require_once __DIR__.'/../../include/php/const';
+
+
+	function chip_state($p_id_chip, $p_state){
+
+		$g_pins  = null;
+		$g_state = null;
+
+
+
+		/* [1] Cache chips
+		=========================================================*/
+		/* (1) Get file handler */
+		$f_chips = new SplFileObject(CHIPS_CONF, 'r');
+
+		/* (2) Parse line by line */
+		while( !$f_chips->eof() ){
+
+			// {1} Try to parse current line //
+			$parsed = json_decode($f_chips->fgets(), true);
+
+			// {2} If cannot parse, go to next //
+			if( is_null($parsed) )
+				continue;
+
+			// {3} Check if choosen pin //
+			if( $parsed[0] == $p_id_chip ){
+
+				// store pin list
+				$g_pins = $parsed[1];
+
+				/* (3) Check if choosen state */
+				foreach($parsed[2] as $state=>$pinValues){
+
+					if( "$state" === "$p_state" ){
+						
+						// store state values
+						$g_state = $pinValues;
+						break;
+					}
+
+				}
+
+				break;
+			}
+		}
+
+		/* (3) If chip not found -> abort */
+		if( is_null($g_pins) || is_null($g_state) )
+			return 127;
+			
+
+
+		/* [2] Set chip to choosen state
+		=========================================================*/
+		/* (1) Activate pin + set OUT mode */
+		foreach($g_pins as $pinNumber)
+			// if failed -> propagate error
+			if( syscall(SOURCE_DIR."/gpio/out {$pinNumber}") == false )
+				return 127;
+
+		/* (2) For each pin, set the associated value */
+		foreach($g_state as $pinIndex=>$pinValue){
+
+			// {1} set value to LOW if 0 //
+			if( $pinValue == 0 )
+				if( syscall(SOURCE_DIR."/gpio/low ".$g_pins[$pinIndex]) == false )
+					return 127;
+
+			// {2} set value to HIGH if not 0 //
+			else
+				if( syscall(SOURCE_DIR."/gpio/high ".$g_pins[$pinIndex]) == false )
+					return 127;
+
+		}
+
+
+		return 0;
+
+	}
+
+
+	/* [1] Check argument (chip position, chip state)
+	=========================================================*/
+	if( $argc < 3 || !preg_match('@^\d+$@', $argv[1]) || !preg_match('@^[A-Za-z0-9]{1}$@', $argv[2]) ){
+		echo 127;
+		die(127);
+	}
+
+	/* [2] Launch main script
+	=========================================================*/
+	$exec = chip_state($argv[1], $argv[2]);
+
+	echo $exec;
+	die($exec);
+?>
+

lib/chip/state

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/usr/bin/env php $(realpath $(dirname $0))/source/state.php $*;