Add a error analyzer

header/error_analyzer.h

@@ -0,0 +1,12 @@
+#ifndef _ERROR_ANALYZER_H_
+#define _ERROR_ANALYZER_H_
+
+#include "../header/common.h"
+#include "../header/instruction_table.h"
+#include "../header/shash/shash.h"
+
+/* Check if there exist errors in the Assembly using the tokens array
+   Returns amount of errors found, and prints out the error's to stdout */
+unsigned int check_token_errors(char tokens[][MAX_TOKEN_SIZE], shash_hashtable_t instruction_information_table);
+
+#endif

src/error_analyzer.c

@@ -0,0 +1,95 @@
+#include "../header/error_analyzer.h"
+#include "../header/instruction_table.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+
+unsigned int check_token_errors(char tokens[][MAX_TOKEN_SIZE], shash_hashtable_t instruction_information_table)
+{
+    printf("=====================\nErrors found:\n");
+    unsigned int error_count = 0;
+
+    for (int i = 0; tokens[i][0] != EOF; i++)
+    {
+        instruction_information_t *current_token_info = shash_get(tokens[i], (unsigned int)strlen(tokens[i]), &instruction_information_table);
+        if (current_token_info == NULL)
+        {
+            // Couldn't find the instruction
+            printf("ERROR: Insruction %s does not exist\n", tokens[i]);
+            error_count++;
+
+            // Loop to the next ;
+            for (; tokens[i][0] != ';'; i++)
+            {
+                if (tokens[i][0] == EOF)
+                    break;
+            }
+            continue;
+        }
+
+        if (current_token_info->requires_adress == 1)
+        {
+            switch (current_token_info->supports_adress_label)
+            {
+            case 1:
+            /* Labels are not implemented yet
+               When they are, we need to check wether we got a label,
+               And if yes, we need to make sure the label exists */
+            case 0:
+            {
+                // Check the adress stored at the next token
+                i++;
+		if(tokens[i][0] == ';')
+		{
+		    printf("ERROR: expected adress at token %d\n", i);
+		    error_count++;
+		    break;
+		}
+
+		
+                int adress = atoi(tokens[i]);
+                if (adress > MAX_MEMORY || adress < 1)
+                {
+                    printf("ERROR: Adress %s at token %d is invalid\n", tokens[i], i);
+                    error_count++;
+                }
+
+		// Check that the next token is a ;
+		i++;
+		if (tokens[i][0] != ';')
+		{
+		    printf("ERROR: Expected end of instruction at %d but found \"%s\"\n", i, tokens[i]);
+		    error_count++;
+
+		    // Loop to the next ;
+		    for (; tokens[i][0] != ';'; i++)
+		    {
+			if (tokens[i][0] == EOF)
+			    break;
+		    }
+		}
+                break;
+            }
+            }
+        }
+        else
+        {
+            // Check that the next token is a ;
+            i++;
+            if (tokens[i][0] != ';')
+            {
+                printf("ERROR: Expected end of instruction at %d but found \"%s\"\n", i, tokens[i]);
+                error_count++;
+
+                // Loop to the next ;
+                for (; tokens[i][0] != ';'; i++)
+                {
+                    if (tokens[i][0] == EOF)
+                        break;
+                }
+            }
+        }
+    }
+    return error_count;
+}

src/main.c

@@ -15,6 +15,8 @@ It also is responsible for Argument Parsing
 #include "../header/image_saver.h"
 #include "../header/lexer.h"
 #include "../header/target_code_generator.h"
+#include "../header/error_analyzer.h"
+#include "../header/instruction_table.h"
 
 
 const char *argp_program_version =
@@ -117,6 +119,8 @@ int main(int argc, char **argv)
     // A variable for storing retrun values of functions that return errors on failure
     int error;
 
+    shash_hashtable_t instruction_informations = create_instruction_information_hastable();
+
     // set defaults
     arguments.output_file = DEFAULT_OUT_FILE;
     arguments.input_file = "";
@@ -141,7 +145,9 @@ int main(int argc, char **argv)
     
     lexer(assembly_file, tokens);
     fclose(assembly_file);
-
+    
+    printf("Found %d errors\n", check_token_errors(tokens, instruction_informations));
+    
     if(target_code == NULL)
     {
 	printf("Error: Could not allocate memory for the target code\n");
@@ -167,5 +173,7 @@ int main(int argc, char **argv)
     if (arguments.print_target_code)
         print_target_code(target_code);
 
+    destroy_instruction_information_hashtable(&instruction_informations);
+    
     return EXIT_SUCCESS;
 }

test/errors.eipaasm

@@ -0,0 +1,8 @@
+INP;
+INP 30 ; helo
+INC 43;
+INC;
+EOJJ
+EOJ
+STA 45 hmmm
+RER;xs