From e96329ac0383dc5e9eaf9fdee9c6cdf36ba2ab8f Mon Sep 17 00:00:00 2001
From: Steven Tracey <steven@nevets.tech>
Date: Thu, 3 Nov 2022 12:47:44 -0400
Subject: [PATCH] Upload

---
 .idea/.gitignore              |   8 +++
 .idea/HexDecBinCalculator.iml |   8 +++
 .idea/modules.xml             |   8 +++
 .idea/php.xml                 |   4 ++
 conversions.php               |  75 +++++++++++++++++++++++
 index.php                     | 111 ++++++++++++++++++++++++++++++++++
 style.css                     |  35 +++++++++++
 7 files changed, 249 insertions(+)
 create mode 100644 .idea/.gitignore
 create mode 100644 .idea/HexDecBinCalculator.iml
 create mode 100644 .idea/modules.xml
 create mode 100644 .idea/php.xml
 create mode 100644 conversions.php
 create mode 100644 index.php
 create mode 100644 style.css

diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/HexDecBinCalculator.iml b/.idea/HexDecBinCalculator.iml
new file mode 100644
index 0000000..c956989
--- /dev/null
+++ b/.idea/HexDecBinCalculator.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..8e58e57
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/HexDecBinCalculator.iml" filepath="$PROJECT_DIR$/.idea/HexDecBinCalculator.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/php.xml b/.idea/php.xml
new file mode 100644
index 0000000..7e5d55a
--- /dev/null
+++ b/.idea/php.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PhpProjectSharedConfiguration" php_language_level="8.1" />
+</project>
\ No newline at end of file
diff --git a/conversions.php b/conversions.php
new file mode 100644
index 0000000..86b3b95
--- /dev/null
+++ b/conversions.php
@@ -0,0 +1,75 @@
+<?php
+
+function hex_to_decimal(string $hex) : int {
+    $chars = array(0 => 0, 1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 5, 6 => 6, 7 => 7, 8 => 8,
+        9 => 9, "A" => 10, "B" => 11, "C" => 12, "D" => 13, "E" => 14, "F" => 15);
+    $decimal = 0;
+    $hex_chars = str_split(strrev(strtoupper($hex)));
+    for ($i = 0; $i < sizeof($hex_chars); $i++) {
+        $decimal += $chars[$hex_chars[$i]] * (16 ** $i);
+    }
+
+    return $decimal;
+}
+
+function hex_to_binary(string $hex) : int {
+    $decimal = hex_to_decimal($hex);
+    return decimal_to_binary($decimal);
+}
+
+function decimal_to_hex(int $decimal) : string {
+    $chars = array(0 => 0, 1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 5, 6 => 6, 7 => 7, 8 => 8,
+        9 => 9, 10 => "A", 11 => "B", 12 => "C", 13 => "D", 14 => "E", 15 => "F");
+    $remainder = $decimal;
+    $hex_string = "";
+    while ($remainder > 0) {
+        if ($remainder < 16) {
+            $hex_string = $chars[$remainder] . $hex_string;
+            break;
+        } else {
+            $temp_remainder = $remainder % 16;
+            $quotient = ($remainder - $temp_remainder) / 16;
+
+            $hex_string = $chars[$temp_remainder] . $hex_string;
+            $remainder = $quotient;
+        }
+    }
+    return $hex_string;
+}
+
+function decimal_to_binary(int $decimal) : int {
+    $remainder = $decimal;
+    $greatest_base_2 = 0;
+    $binary_str = "";
+    for ($i = 0; (2 ** $i) < $remainder; $i++) {
+        $greatest_base_2 = $i;
+    }
+    while ($greatest_base_2 >= 0) {
+        if ($remainder < (2 ** $greatest_base_2)) {
+            $binary_str = $binary_str . "0";
+        } else {
+            $remainder = $remainder - (2 ** $greatest_base_2);
+            $binary_str = $binary_str . "1";
+        }
+        $greatest_base_2--;
+    }
+
+    return intval($binary_str);
+}
+
+function binary_to_decimal(int $binary) : int {
+    $digits = str_split(strrev(strval($binary)));
+    $decimal = 0;
+    for ($i = 0; $i < sizeof($digits); $i++) {
+        if ($digits[$i] == "1") {
+            $decimal = $decimal + (2 ** $i);
+        }
+    }
+
+    return $decimal;
+}
+
+function binary_to_hex(int $binary) : string {
+    $decimal = binary_to_decimal($binary);
+    return decimal_to_hex($decimal);
+}
\ No newline at end of file
diff --git a/index.php b/index.php
new file mode 100644
index 0000000..b87de5f
--- /dev/null
+++ b/index.php
@@ -0,0 +1,111 @@
+<?php
+include "./conversions.php";
+?>
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <link rel="stylesheet" href="./style.css">
+    <title>HexDecBin Calc</title>
+</head>
+<body>
+    <div class="inputs">
+        <form action="index.php" method="get">
+            <?php
+            session_start();
+
+            $bin = 0;
+            $dec = 0;
+            $hex = 0;
+            $new = false;
+
+            if (!isset($_GET['binary']) ||
+                !isset($_GET['decimal']) ||
+                !isset($_GET['hexadecimal'])) {
+                $new = true;
+            }
+
+            if (!isset($_SESSION['bin']) ||
+                !isset($_SESSION['dec']) ||
+                !isset($_SESSION['hex'])) {
+                $_SESSION['bin'] = 0;
+                $_SESSION['dec'] = 0;
+                $_SESSION['hex'] = 0;
+            }
+
+            if (!$new) {
+                $last_bin = $_SESSION['bin'];
+                $last_dec = $_SESSION['dec'];
+                $last_hex = $_SESSION['hex'];
+
+                $bin = $_GET['binary'];
+                $dec = $_GET['decimal'];
+                $hex = $_GET['hexadecimal'];
+
+                if ($bin == 0 && $dec == 0) {
+                    $bin = hex_to_binary($hex);
+                    $_SESSION['bin'] = $bin;
+                    $dec = hex_to_decimal($hex);
+                    $_SESSION['dec'] = $dec;
+                    $_SESSION['hex'] = $hex;
+                } else if ($bin == 0 && $hex == 0) {
+                    $bin = decimal_to_binary($dec);
+                    $_SESSION['bin'] = $bin;
+                    $_SESSION['dec'] = $dec;
+                    $hex = decimal_to_hex($dec);
+                    $_SESSION['hex'] = $hex;
+                } else if ($dec == 0 && $hex == 0) {
+                    $_SESSION['bin'] = $bin;
+                    $dec = binary_to_decimal($bin);
+                    $_SESSION['dec'] = $dec;
+                    $hex = binary_to_hex($bin);
+                    $_SESSION['hex'] = $hex;
+                }
+                else {
+                    if ($bin == $last_bin && $dec == $last_dec && $hex != $last_hex) {
+                        $bin = hex_to_binary($hex);
+                        $_SESSION['bin'] = $bin;
+                        $dec = hex_to_decimal($hex);
+                        $_SESSION['dec'] = $dec;
+                        $_SESSION['hex'] = $hex;
+                    } else if ($bin == $last_bin && $hex == $last_hex && $dec != $last_dec) {
+                        $bin = decimal_to_binary($dec);
+                        $_SESSION['bin'] = $bin;
+                        $_SESSION['dec'] = $dec;
+                        $hex = decimal_to_hex($dec);
+                        $_SESSION['hex'] = $hex;
+                    } else if ($dec == $last_dec && $hex == $last_hex && $bin != $last_bin) {
+                        $_SESSION['bin'] = $bin;
+                        $dec = binary_to_decimal($bin);
+                        $_SESSION['dec'] = $dec;
+                        $hex = binary_to_hex($bin);
+                        $_SESSION['hex'] = $hex;
+                    } else {
+                        $bin = 0;
+                        $dec = 0;
+                        $hex = 0;
+                    }
+                }
+            }
+            ?>
+            <div>
+                <label for="binary">Binary: </label>
+                <input type="text" id="binary" name="binary" value="<?php echo $bin; ?>">
+            </div>
+
+            <div>
+                <label for="decimal">Decimal: </label>
+                <input type="text" id="decimal" name="decimal" value="<?php echo $dec; ?>">
+            </div>
+
+            <div>
+                <label for="hexadecimal">Hexadecimal: </label>
+                <input type="text" id="hexadecimal" name="hexadecimal" value="<?php echo $hex; ?>">
+            </div>
+
+            <div>
+                <input class="submit" type="submit">
+            </div>
+        </form>
+    </div>
+</body>
+</html>
diff --git a/style.css b/style.css
new file mode 100644
index 0000000..32c815c
--- /dev/null
+++ b/style.css
@@ -0,0 +1,35 @@
+* {
+    background-color: #27263D;
+    color: white;
+    font-family: "Trebuchet MS", serif;
+}
+
+.inputs {
+    margin: 50px auto auto;
+    width: 50%;
+    border: 2px solid black;
+    border-radius: 50px;
+    padding: 10px;
+}
+
+.submit {
+    margin: auto 30%;
+    width: 40%;
+    padding: 10px;
+}
+
+div {
+    margin-bottom: 10px;
+}
+
+label {
+    display: inline-block;
+    width: 40%;
+    text-align: right;
+}
+
+input {
+    margin: 10px auto auto;
+    width: 25%;
+    padding: 10px;
+}