WIP. Somewhere in between the init of basic_cmd_run and basic_cmd_list calls to _cputs stop working with constant character string pointers and only work with pointers off the heap.

src/basic.c

@@ -42,27 +42,37 @@ void basic_cmd_rem(void *expr)
 void basic_cmd_list(void *data)
 {
   int i = 0;
+  int x = 0;
   int limit = basic_last_stored_lineno;
   char *lineptr = NULL;
 
   i = 0;
   /* I don't know why, but somehow, this makes the interspersed _cputs() calls below work.
    * Take this out, and those lines stop working.
+   *
    * WHAT. THE. FUCK.
+   *
+   *
+   * memcpy((char *)&const_string_test, (char *)"            \0", strlen("            \0"));
+   * _cputs((char *)&const_string_test);
    */
-  memcpy((char *)&const_string_test, (char *)"OMG WTF BBQ\n\0", strlen("OMG WTF BBQ\n\0"));
-  _cputs((char *)&const_string_test);
+  /* 12 characters of nothing? This does the same thing as the cputs above. 
+   * But cputs is still broken after this. It's the memcpy that is fixing whatever is wrong.
+   */
+  /*for ( i = 0; i < 12; i++ ) {
+    _putch(' ');
+    advanceCursor();
+  }*/
   for ( i = 0; i <= limit ; i++ ) {
-    lineptr = basic_memory_line_address(i);
-    if ( lineptr == NULL ) {
-      continue;
-    }
-    if ( (char)*lineptr != 0x00 ) {
+    if ( basic_memory_lines[i][0] != 0 ) {
       itoa(i+1, (char *)&decimal);
       _cputs((char *)&decimal);
-      _cputs(" WTF");
-      _cputs(lineptr);
-      _cputs("BBQ\n");
+      _putch(' ');
+      advanceCursor();
+      _cputs(basic_memory_line_address(i));
+      _putch('\n');
+      _cursor_x = 80;
+      advanceCursor();
     }
   }
 }
@@ -86,9 +96,9 @@ void basic_cmd_run(void *data)
   char *lineptr;
   for ( i = 0; i <= basic_last_stored_lineno ; i++ ) {
     basic_errno = 0;
-    lineptr = basic_memory_line_address(i);
-    if ( (char)*lineptr != 0x00 ) {
-      rc = basic_run_line_v2(lineptr, 0);
+    /*lineptr = basic_memory_line_address(i);*/
+    if ( basic_memory_lines[i][0] != 0x00 ) {
+      rc = basic_run_line_v2((char *)basic_memory_lines[i], 1);
       if ( rc != 0 || basic_errno != 0 ) {
         _cputs("Error at Line ");
         itoa(i+1, (char *)&decimal);
@@ -134,20 +144,21 @@ char *_tokenize(char *ptr, char *token)
 
   memset(&_tokenizer_value, 0x00, BASIC_TOKENIZER_MAX_LENGTH);
   while ( *ptr != 0x0 ) {
-    tokenptr = token;
-    for ( i = 0 ; i < numtokens; i++) {
-      if ( *ptr == *(tokenptr + i)) {
-        if ( len == 0 ) {
-          len = 1;
-          ptr += 1;
-        }
-        goto _tokenize_copy;
-      }      
+    /*for ( tokenptr = token ; *tokenptr != 0x00; tokenptr += 1) {
+      if ( *ptr == *tokenptr) {
+        goto _tokenize_copy;*/
+      if ( *ptr == ' ' ) {
+        break;
       }      
+    /*}*/
     ptr += 1;
     len += 1;
   }
 _tokenize_copy:
+  if ( len == 0 ) {
+    len = 1;
+    ptr += 1;
+  }
   if ( len > BASIC_TOKENIZER_MAX_LENGTH ) {
     basic_errno = BASIC_ERR_SYNTAX_TOKEN_LENGTH;
     return NULL;
@@ -192,9 +203,10 @@ int basic_memory_line_store(char *content, int lineno)
      * through to LIST those lines later we may find garbage. Let's clean it up.
      */
     for ( i = basic_last_stored_lineno+1; i <= lineno ; i++ ) {
-      ptr = basic_memory_line_address(i);
       /* We don't need to zero the entire string, just the first character, don't waste time */
-      memset(ptr, 0x00, BASIC_MAX_LINE_LENGTH);
+      basic_memory_lines[i][0] = 0x00;
+      /*ptr = basic_memory_line_address(i);*/
+      /*memset(ptr, 0x00, BASIC_MAX_LINE_LENGTH);*/
     }
   }
   lineno -= 1;
@@ -246,6 +258,7 @@ int basic_run_line_v2(char *codeline, int repl_mode)
 
     /* Report errors */
     if ( basic_errno != 0 ) {
+      /*_cputs(token);*/
       basic_report_error("Parsing error: ");
     }
 
@@ -289,11 +302,10 @@ void basic_repl(void)
   char keybuff[512];
   int i;
   char *ptr;
+  char *token;
 
   blankScreen();
   setCursorPosition(0, 0);
-  _cputs("Piquant Basic v0.1\n");
-  _cputs("READY\n");
 
   basic_repl_mode = 1;
   basic_memory_line_store("LIST", 10);
@@ -301,13 +313,29 @@ void basic_repl(void)
   basic_memory_line_store("PRINT WORLD\n", 30);
   basic_memory_line_store("PRINT GOODBYE\n", 40);
 
+  _cputs("Piquant Basic v0.1\n");
+  _cputs("READY\n");
+
   while ( 1 ) {
     basic_errno = 0;
     if ( basic_repl_mode == 1 ) {
       basic_cmd_run(NULL);
+      /*basic_cmd_list(NULL);
+      ptr = _tokenize((char *)&basic_memory_lines[19], " ");
+      token = tokenizer_token();
+      basic_cmd_print(ptr);
+      ptr = _tokenize((char *)&basic_memory_lines[29], " ");
+      token = tokenizer_token();
+      basic_cmd_print(ptr);
+      ptr = _tokenize((char *)&basic_memory_lines[39], " ");
+      token = tokenizer_token();
+      basic_cmd_print(ptr);
+      basic_run_line_v2((char *)&basic_memory_lines[19], 1);
+      basic_run_line_v2((char *)&basic_memory_lines[29], 1);
+      basic_run_line_v2((char *)&basic_memory_lines[39], 1);*/
       basic_repl_mode = 0;
     }
-    _cputs("> ");
+    _cputs("\n> ");
 
     /* Read */
     memset((void *)&keybuff, 0x00, 512);