diff --git a/input.c b/input.c
index 8e500b3..3a5e06a 100644
--- a/input.c
+++ b/input.c
@@ -5,24 +5,19 @@
 int
 readb(FILE *fp, unsigned char *s, int slen)
 {
-    int read, tread;
-    unsigned char *send, *sbeg;
+    unsigned char *send;
+    unsigned char *sbeg;
     unsigned char *l, *r;
     
-    read = tread = 0;
-    sbeg = l = r = s;
-    while (tread < slen && (read = fread(l, sizeof(*l), slen-tread, fp))) {
-        tread += read;
-        send = s + tread;
-        for (r = l; r < send; ++r)
-            if (*r != '\n')
-                *l++ = *r;
-        tread -= r - l;
-        if (l > sbeg) {
-            for (--l; *l == PADDING; --l)
-                ;
-            ++l;
-        }
+    sbeg = s;
+    send = s + fread(s, sizeof(*s), slen, fp);
+    for (l = r = sbeg; r < send; ++r)
+        if (*r != '\n')
+            *l++ = *r;
+    if (l > sbeg) {
+        for (--l; *l == PADDING; --l)
+            ;
+        ++l;
     }
 
     return l-sbeg;