more changes, working on the asm parser

src/spider/compiler/text/TextReader.cpp

@@ -16,6 +16,33 @@ namespace spider {
 
     TextReader::~TextReader() {}
 
+    bool TextReader::eat(u32 _char) {
+        if(current() == _char) {
+            nextChar();
+            return true;
+        }
+        return false;
+    }
+    
+    bool TextReader::eat(char _char) {
+        return this->eat(u32(_char));
+    }
+
+    bool TextReader::eat(const std::string& chars) {
+        isize index = 0, count = 0;
+        u32 _char;
+        while(index < chars.length()) {
+            if(!utf8::charAt(chars, index, _char)) return false;
+            if(_char != peekChar(count)) return false;
+            count++;
+        }
+        if(index == chars.length()) {
+            nextChar(count);
+            return true;
+        }
+        return false;
+    }
+
     char TextReader::readByte() {
         if (err) return 0;
         auto& s = getStream();
@@ -49,14 +76,16 @@ namespace spider {
     /**
      * Reads the next character and advances the position tracker.
      */
-    u32 TextReader::nextChar() {
+    u32 TextReader::nextChar(isize n) {
         if (err) return 0;
 
         // Ensure the character we are moving TO exists
-        if (fillBufferTo(1)) {
-            // Track the cursor position using the character we are leaving behind
-            advance(current());
-            bufferIndex++;
+        if (fillBufferTo(n)) {
+            // advance n characters
+            while(n--) {
+                advance(current());
+                bufferIndex++;
+            }
             return current();
         }