mark fall through as intentional

header/common.h

@@ -33,6 +33,7 @@ Here, common macros are specified
 #define ASCII_TAB 9
 #define ASCII_SPACE 32
 #define ASCII_NEWLINE 10
+#define ASCII_CARRIAGE_RETURN 13
 
 #define INSTR_INP 0b0001
 #define INSTR_OUT 0b0010

src/error_analyzer.c

@@ -60,10 +60,12 @@ unsigned int check_token_errors(char tokens[][MAX_TOKEN_SIZE], shash_hashtable_t
 				    break;
 			    }
 			}
+			// Do not fall through
 			break;
 		    }
 		    
 		}
+		// fall through
                 case 0:
                 {
                     // Check the adress stored at the next token

src/lexer.c

@@ -91,6 +91,30 @@ void lexer(FILE *input_file, dynamic_buffer_t *tokens)
 
             is_pos_line_start = 1;
             break;
+	case ASCII_CARRIAGE_RETURN:
+	    // Some operating systems use \r\n or just \r for newlines in texts.
+
+	    // This is a indice of a new token -> increase token_index
+	    token_index++;
+
+            // This also is a indice of a new instruction beginning
+            // in the tokens array, instructions are seperated by semicolons
+            ((char (*)[MAX_TOKEN_SIZE]) tokens->buffer)[token_index][0] = ';';
+	    tokens->used += MAX_TOKEN_SIZE;
+
+            // Since the Instruction seperator (';') is also a token, we need to increase token_index again
+            token_index++;
+
+	    // Check for \r\n
+	    if((char) prefgetc(input_file) == ASCII_NEWLINE)
+	    {
+		// Skip over this \n
+		current_char = fgetc(input_file);
+	    }
+
+            is_pos_line_start = 1;
+            break;
+	    
         case ';':
             // Loop over the comment
             while (prefgetc(input_file) != ASCII_NEWLINE && prefgetc(input_file) != '\0')

src/main.c

@@ -127,7 +127,7 @@ int main(int argc, char **argv)
 
     // Tokenize the EIPA Assembly
     FILE *assembly_file;
-    assembly_file = fopen(arguments.input_file, "r");
+    assembly_file = fopen(arguments.input_file, "rb");
     if (assembly_file == NULL)
     {
 	printf("Error: Couldn't open input file\n");