From: Lukas Krickl <lukas@krickl.dev>
Date: Thu, 22 Feb 2024 18:38:19 +0000 (+0100)
Subject: WIP: disasm
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=40b3b16ba3da8087f02dfbe6681127acefa343ec;p=ulas%2F.git

WIP: disasm
---

diff --git a/src/uldas.c b/src/uldas.c
index cac2532..15cddab 100644
--- a/src/uldas.c
+++ b/src/uldas.c
@@ -1,17 +1,28 @@
 #include "uldas.h"
 
+// dasm the next instruction
+// if there are no more bytes to be read, return 0
+// on error return -1
+// otherwise return 1
+int ulas_dasm_next(FILE *src, FILE *dst) {
+  unsigned long srctell = ftell(src);
+  // read n bytes (as many as in instruction)
+  char outbuf[ULAS_OUTBUFMAX];
+  memset(outbuf, 0, ULAS_OUTBUFMAX);
+
+  return 0;
+}
+
 int ulas_dasm(FILE *src, FILE *dst) {
-  // pass 1: run and collect labels 
+  // pass 1: run and collect labels
   // pass 2: run and output to file
-  
-  // TODO: the instruction list should be sorted so we can search it faster
-  // but for now we just do it as a linear search
-  
-  unsigned long srctell = ftell(src);
-  
-  int c = '\0';
-  while (fgetc(src) != EOF) {
+
+  int rc = 0;
+  while ((rc = ulas_dasm_next(src, dst)) > 0) {
+    if (rc == -1) {
+      return -1;
+    }
   }
 
-  return 0;
+  return rc;
 }