fix: bugs associated to map reallocating

1 files changed, 5 insertions, 10 deletions

diff --git a/sys/libn/bufio.c b/sys/libn/bufio.c
index ac8e175..05b6068 100644
--- a/sys/libn/bufio.c
+++ b/sys/libn/bufio.c
@@ -18,7 +18,7 @@ bufio·initreader(io·Buffer *buf, io·Reader rdr, void *h)
     buf->beg      = buf->buf + bufio·ungets;
     buf->pos      = buf->beg;
     buf->end      = buf->pos; 
-    buf->size     = buf->end - buf->beg;
+    buf->size     = bufio·size - bufio·ungets;
 
     return 0;
 }
@@ -40,8 +40,9 @@ refill(io·Buffer *buf)
     if (buf->state & bufio·end) {
         return bufio·err;
     }
+    memcpy(buf->buf, buf->pos - bufio·ungets, bufio·ungets);
 
-    n = buf->rdr.read(buf->h, 1, buf->size, buf->buf);
+    n = buf->rdr.read(buf->h, 1, buf->size, buf->beg);
     if (n < 0) 
         return bufio·err;
     if (n == 0) {
@@ -49,14 +50,8 @@ refill(io·Buffer *buf)
         return 0;
     }
 
-    if (n < buf->size) {
-        d = buf->size - n;
-
-        buf->state |= bufio·end;
-
-        memmove(buf->pos + d, buf->pos, n);
-        memmove(buf->pos + d - bufio·ungets, buf->buf, bufio·ungets);
-    }
+    buf->pos = buf->beg;
+    buf->end = buf->pos + n;
 
     return n;
 }