moved buffer into heap, prep to remove substates

include/fh_mem.h

@@ -7,6 +7,8 @@
 #ifndef FORTH_FH_MEM_H
 #define FORTH_FH_MEM_H
 
+void fh_fill_input_buffer(struct fh_thread_s *fh, const char *data, size_t num);
+
 void fh_align(struct fh_thread_s *fh);
 
 void fh_setbase(struct fh_thread_s *fh, uint32_t base);

include/fh_runtime.h

@@ -148,6 +148,11 @@ struct fh_thread_s {
   /** Address of the last dict word */
   uint32_t dict_last;
 
+  /** Input buffer parse position */
+  uint32_t inputptr;
+  /** Input buffer total content size */
+  uint32_t inputlen;
+
   /** Forth state */
   enum fh_state state;
 
@@ -158,6 +163,10 @@ struct fh_thread_s {
   uint32_t base;
 };
 
+#define HEAP_END      (HEAP_SIZE - WORDBUF_SIZE - INPUT_BUFFER_SIZE)
+#define WORDBUF_ADDR  HEAP_END
+#define INPUTBUF_ADDR (HEAP_END + WORDBUF_SIZE)
+
 enum fh_error fh_add_word(const struct fh_word_s *w, struct fh_thread_s *fh);
 
 void fh_setstate(struct fh_thread_s *fh, enum fh_state state, enum fh_substate substate);

include/forth.h

@@ -16,6 +16,6 @@
 struct fh_thread_s;
 
 enum fh_error fh_init(struct fh_thread_s *fh);
-enum fh_error fh_process_line(struct fh_thread_s *fh, const char *linebuf);
+enum fh_error fh_process_line(struct fh_thread_s *fh, const char *linebuf, size_t len);
 
 #endif //FORTH_H