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Add POSIX Reg Extended tool
This commit is contained in:
Davidson Francis
parent
32b9d8b772
commit
82f59c760b
22
tools/Makefile
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22
tools/Makefile
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#
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# Alertik: a tiny 'syslog' server & notification tool for Mikrotik routers.
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# This is free and unencumbered software released into the public domain.
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#
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CC ?= cc
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CC_JS = emcc
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CFLAGS += -Wall -Wextra -O2
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CFLAGS_JS += $(CFLAGS)
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CFLAGS_JS += -s EXPORTED_FUNCTIONS='["_do_regex", "_malloc", "_free"]'
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CFLAGS_JS += -s 'EXPORTED_RUNTIME_METHODS=["stringToUTF8", "UTF8ToString", "setValue"]'
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all: regext.js regext Makefile
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regext.js: regext.c
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$(CC_JS) $(CFLAGS_JS) regext.c -o regext.js
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regext: regext.c
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$(CC) $(CFLAGS) -DUSE_C regext.c -o regext
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clean:
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rm -f regext.js regext.wasm regext *.o
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232
tools/index.html
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232
tools/index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>POSIX Regex Extended Validator</title>
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<style>
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body {
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font-family: Arial, sans-serif;
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background-color: #e0f7da;
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color: #2e7d32;
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display: flex;
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justify-content: center;
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align-items: center;
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height: 100vh;
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margin: 0;
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}
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.container {
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background-color: #a5d6a7;
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border-radius: 10px;
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box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
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padding: 20px;
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max-width: 800px;
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width: 100%;
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text-align: center;
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}
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.container h1 {
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margin-bottom: 20px;
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font-size: 24px;
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}
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.form-group {
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margin-bottom: 15px;
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width: 100%;
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}
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.form-group label {
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font-weight: bold;
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display: block;
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margin-bottom: 5px;
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}
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.form-group textarea,
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.form-group input {
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width: calc(100% - 20px);
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padding: 10px;
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border: 1px solid #81c784;
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border-radius: 5px;
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box-sizing: border-box;
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}
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textarea {
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resize: none;
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}
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input[readonly],
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.output {
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background-color: #f1f8e9;
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text-align: left;
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}
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.form-group input[type="text"].no-match {
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background-color: #ffcccb;
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}
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ul {
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list-style-type: none;
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padding-left: 0;
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margin: 0;
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}
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ul li {
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background-color: #f1f8e9;
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border: 1px solid #81c784;
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border-radius: 5px;
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margin-bottom: 5px;
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padding: 10px;
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}
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.result {
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font-weight: bold;
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}
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.env-variable {
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margin-top: 10px;
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font-style: italic;
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color: #1b5e20;
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}
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.footer {
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margin-top: 20px;
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display: flex;
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align-items: center;
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justify-content: center;
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}
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.footer img {
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width: 20px;
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height: 20px;
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margin-right: 10px;
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}
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.flex-container {
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display: flex;
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justify-content: space-between;
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align-items: flex-start;
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width: 100%;
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}
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.flex-item {
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width: 48%;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>POSIX Regex Extended Validator</h1>
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<div class="form-group">
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<label for="regex">Your Regex</label>
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<textarea id="regex" placeholder="Enter your regex" oninput="validateRegex()"></textarea>
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</div>
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<div class="form-group">
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<label for="inputString">Input Field</label>
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<textarea id="inputString" placeholder="Enter input string" oninput="validateRegex()"></textarea>
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</div>
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<div class="flex-container">
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<div class="flex-item">
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<div class="form-group">
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<label for="isMatch">Matches?</label>
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<input type="text" id="isMatch" readonly />
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</div>
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<div class="form-group">
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<label for="matches">Matching Output</label>
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<input type="text" id="matches" readonly />
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</div>
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</div>
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<div class="flex-item">
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<div class="form-group">
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<label for="groups">Matching Groups</label>
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<ul id="groups" class="output"></ul>
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</div>
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</div>
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</div>
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<div id="envVariable" class="env-variable"></div>
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<div class="footer">
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<a href="https://github.com/Theldus/alertik" target="_blank">
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<img src="https://github.githubassets.com/images/modules/logos_page/GitHub-Mark.png" alt="GitHub Logo" />
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</a>
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<span>by Theldus</span>
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</div>
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</div>
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<script async type="text/javascript" src="regext.js"></script>
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<script>
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function arrayToPtr(array, bytes_per_element) {
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var ptr = Module._malloc(array.length * bytes_per_element);
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for (var i = 0; i < array.length; i++) {
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Module.setValue(ptr + i * bytes_per_element, array[i], "i32");
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}
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return ptr;
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}
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function ptrToArray(ptr, length, bytes_per_element) {
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var array = new Int32Array(length);
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var pos = ptr / bytes_per_element;
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array.set(Module.HEAP32.subarray(pos, pos + length));
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return array;
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}
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function validateRegex() {
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const regexInput = document.getElementById("regex").value;
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const inputString = document.getElementById("inputString").value;
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const isMatchInput = document.getElementById("isMatch");
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const matchesInput = document.getElementById("matches");
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const groupsList = document.getElementById("groups");
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const envVariable = document.getElementById("envVariable");
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if (regexInput === "" || inputString === "") {
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isMatchInput.value = "";
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matchesInput.value = "";
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groupsList.innerHTML = "";
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envVariable.textContent = "";
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return;
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}
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const subExpr = new Int32Array(1);
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const rmSo = new Int32Array(32);
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const rmEo = new Int32Array(32);
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const errorMsg = new Uint8Array(128);
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const rePtr = Module._malloc(regexInput.length + 1);
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Module.stringToUTF8(regexInput, rePtr, regexInput.length + 1);
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const strPtr = Module._malloc(inputString.length + 1);
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Module.stringToUTF8(inputString, strPtr, inputString.length + 1);
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const subExprPtr = arrayToPtr(subExpr, 4);
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const rmSoPtr = arrayToPtr(rmSo, 4);
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const rmEoPtr = arrayToPtr(rmEo, 4);
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const errorMsgPtr = arrayToPtr(errorMsg, 1);
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const result = Module._do_regex(rePtr, strPtr, subExprPtr, rmSoPtr,
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rmEoPtr, errorMsgPtr);
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if (result === -1) {
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const errorMsgStr = Module.UTF8ToString(errorMsgPtr);
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isMatchInput.value = "Invalid Regex";
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matchesInput.value = "";
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groupsList.innerHTML = "";
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envVariable.textContent = "";
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isMatchInput.classList.add("no-match");
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} else if (result === 0) {
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isMatchInput.value = "No";
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matchesInput.value = "";
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groupsList.innerHTML = "";
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envVariable.textContent = "";
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isMatchInput.classList.add("no-match");
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} else {
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const subExprCount = ptrToArray(subExprPtr, 1, 4)[0] + 1;
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const rmSoArray = ptrToArray(rmSoPtr, subExprCount, 4);
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const rmEoArray = ptrToArray(rmEoPtr, subExprCount, 4);
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isMatchInput.value = "Yes";
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matchesInput.value = inputString.substring(rmSoArray[0], rmEoArray[0]);
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let groupsHtml = "";
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for (let i = 1; i < subExprCount; i++) {
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const match = inputString.substring(rmSoArray[i], rmEoArray[i]);
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groupsHtml += `<li>$${i}: ${match}</li>`;
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}
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groupsList.innerHTML = groupsHtml;
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envVariable.textContent =
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`Example environment var: EVENT0_MATCH_STR="${regexInput}"`;
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isMatchInput.classList.remove("no-match");
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}
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Module._free(rePtr);
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Module._free(strPtr);
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Module._free(subExprPtr);
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Module._free(rmSoPtr);
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Module._free(rmEoPtr);
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Module._free(errorMsgPtr);
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}
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</script>
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</body>
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</html>
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100
tools/regext.c
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100
tools/regext.c
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/*
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* Alertik: a tiny 'syslog' server & notification tool for Mikrotik routers.
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* This is free and unencumbered software released into the public domain.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <regex.h>
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#include <stdint.h>
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#ifdef DBG
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#define LOG(...) printf(__VA_ARGS__)
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#else
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#define LOG(...)
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#endif
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int do_regex(
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const char *re, const char *str,
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int32_t *sub_expr, int32_t *rm_so, int32_t *rm_eo,
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char *error_msg)
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{
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int ret;
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regex_t regex;
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regmatch_t pmatch[32];
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if ((ret = regcomp(®ex, re, REG_EXTENDED))) {
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regerror(ret, ®ex, error_msg, 128);
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regfree(®ex);
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LOG("Error: %s\n", error_msg);
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return (-1);
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}
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if (regexec(®ex, str, 32, pmatch, 0) == REG_NOMATCH) {
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LOG("No match!\n");
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return (0);
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}
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*sub_expr = regex.re_nsub;
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if (!regex.re_nsub) {
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regfree(®ex);
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LOG("Match without subexpressions!\n");
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return (1);
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}
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LOG("N subexpr: %d\n", *sub_expr);
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/* If exists sub-expressions, save them. */
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for (size_t i = 0; i < regex.re_nsub + 1; i++) {
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rm_so[i - 0] = pmatch[i].rm_so;
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rm_eo[i - 0] = pmatch[i].rm_eo;
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LOG("rm_so[i-1] = %d\nrm_eo[i-1] = %d\n",
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rm_so[i],
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rm_eo[i]);
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}
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regfree(®ex);
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return (2);
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}
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#ifdef USE_C
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int main(int argc, char **argv)
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{
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int32_t se, so[32], eo[32];
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char msg[128] = {0};
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char *re = argv[1];
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char *in = argv[2];
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if (argc < 3) {
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fprintf(stderr, "Usage: %s <regex> <input-text>\n", argv[0]);
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return (1);
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}
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printf("Regex : %s\n", re);
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printf("input-text: %s\n", in);
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int r = do_regex(re, in, &se, so, eo, msg);
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switch (r) {
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case -1:
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printf("Error, reason: %s\n", msg);
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break;
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case 0:
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printf("No match!\n");
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break;
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case 1:
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printf("Match without sub-expressions!\n");
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break;
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case 2:
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printf("Match!!: %.*s\n", eo[0]-so[0], in+so[0]);
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printf("Found %d sub-expressions:\n", se);
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for (int i = 1; i < se+1; i++) {
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printf("$%d: %.*s\n", i, eo[i]-so[i], in+so[i]);
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}
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break;
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}
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return (0);
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}
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#endif
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