1 files changed, 42 insertions, 0 deletions
diff --git a/emu.c b/emu.c
new file mode 100644
index 0000000..490268c
--- /dev/null
+++ b/emu.c
@@ -0,0 +1,42 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+  if (argc < 2)
+    return 1;
+
+  FILE* file = fopen(argv[1], "r");
+  fseek(file, 0, SEEK_END);
+  int flen = ftell(file) / 4;
+  fseek(file, 0, SEEK_SET);
+
+  int* mem = calloc(flen, sizeof(int));
+  fread(mem, sizeof(int), flen, file);
+  fclose(file);
+
+  int a, b, c;
+  int pc = 0;
+
+  while (pc >= 0) {
+    a = mem[pc];
+    b = mem[pc + 1];
+    c = mem[pc + 2];
+    if (a < 0 || b < 0)
+      pc = -1;
+    else {
+      mem[b] = mem[b] - mem[a];
+      if (mem[b] > 0)
+        pc += 3;
+      else
+        pc = c;
+    }
+  }
+
+  file = fopen(argv[1], "w");
+  fwrite(mem, sizeof(int), flen, file);
+  fflush(file);
+  fclose(file);
+  free(mem);
+
+  return 0;
+}