reverting version

include/Module/CharBuffer.h

@@ -0,0 +1,72 @@
+#pragma once
+
+#include <Arduino.h>
+
+class CharBuffer : Print {
+   public:
+    CharBuffer(size_t size) : _capacity(size < 2 ? 2 : size), _write(0), _read(0) {
+        _pool = new char[_capacity + 1];
+        memset(_pool, 0, _capacity + 1);
+    }
+
+    CharBuffer(const CharBuffer &src) {
+        _capacity = src._capacity;
+        _write = src._write;
+        memcpy(_pool, src._pool, src._write);
+    }
+
+    CharBuffer(const char *str) : CharBuffer(strlen(str) + 1) {
+        write((const uint8_t *)str, strlen(str));
+    }
+
+    ~CharBuffer() {
+        delete _pool;
+    }
+
+    void clear() {
+        memset(_pool, 0, _capacity);
+        _write = 0;
+        _read = 0;
+    }
+
+    size_t size() const { return _capacity; }
+
+    size_t free() const { return _capacity - _write - 2; }
+
+    size_t available() const { return _write; }
+
+    const char *c_str() {
+        if (_pool[_write] != '\x00')
+            _pool[_write] = '\x00';
+        return _pool;
+    }
+
+    size_t write(char ch) {
+        return write((uint8_t)ch);
+    };
+
+    size_t write(const uint8_t ch) {
+        size_t n = 0;
+        if (_write < (_capacity - 2)) {
+            _pool[_write++] = ch;
+            n = 1;
+        }
+        return n;
+    }
+
+    size_t write(const uint8_t *ptr, const size_t size) {
+        size_t n = 0;
+        while (n < size) {
+            uint8_t ch = ptr[n++];
+            if (!write(ch))
+                break;
+        }
+        return n;
+    }
+
+   protected:
+    char *_pool;
+    size_t _capacity;
+    size_t _write;
+    size_t _read;
+};