From ed354867a954013acf9077ab15b572665220822a Mon Sep 17 00:00:00 2001
From: Yuichi Nishiwaki <yuichi.nishiwaki@gmail.com>
Date: Fri, 26 Sep 2014 14:13:17 +0900
Subject: [PATCH] suppress warnings of implicit size_t <-> int conversion
 (blob.c)

---
 blob.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/blob.c b/blob.c
index d98187eb..e927f4ff 100644
--- a/blob.c
+++ b/blob.c
@@ -67,7 +67,10 @@ pic_blob_make_bytevector(pic_state *pic)
   if (b < 0 || b > 255)
     pic_errorf(pic, "byte out of range");
 
-  blob = pic_make_blob(pic, k);
+  if (k < 0)
+    pic_errorf(pic, "make-bytevector: cannot create a bytevector of length %d", k);
+
+  blob = pic_make_blob(pic, (size_t)k);
   for (i = 0; i < k; ++i) {
     blob->data[i] = (unsigned char)b;
   }
@@ -82,7 +85,7 @@ pic_blob_bytevector_length(pic_state *pic)
 
   pic_get_args(pic, "b", &bv);
 
-  return pic_int_value(bv->len);
+  return pic_int_value((int)bv->len);
 }
 
 static pic_value
@@ -123,7 +126,7 @@ pic_blob_bytevector_copy_i(pic_state *pic)
   case 3:
     start = 0;
   case 4:
-    end = from->len;
+    end = (int)from->len;
   }
 
   if (to == from && (start <= at && at < end)) {
@@ -146,7 +149,7 @@ static pic_value
 pic_blob_bytevector_copy(pic_state *pic)
 {
   pic_blob *from, *to;
-  int n, start, end, i = 0;
+  int n, start, end, k, i = 0;
 
   n = pic_get_args(pic, "b|ii", &from, &start, &end);
 
@@ -154,10 +157,15 @@ pic_blob_bytevector_copy(pic_state *pic)
   case 1:
     start = 0;
   case 2:
-    end = from->len;
+    end = (int)from->len;
   }
 
-  to = pic_make_blob(pic, end - start);
+  k = end - start;
+
+  if (k < 0)
+    pic_errorf(pic, "make-bytevector: cannot create a bytevector of length %d", k);
+
+  to = pic_make_blob(pic, (size_t)k);
   while (start < end) {
     to->data[i++] = from->data[start++];
   }
@@ -202,7 +210,7 @@ pic_blob_list_to_bytevector(pic_state *pic)
 
   pic_get_args(pic, "o", &list);
 
-  blob = pic_make_blob(pic, pic_length(pic, list));
+  blob = pic_make_blob(pic, (size_t)pic_length(pic, list));
 
   data = blob->data;
 
@@ -230,7 +238,7 @@ pic_blob_bytevector_to_list(pic_state *pic)
   case 1:
     start = 0;
   case 2:
-    end = blob->len;
+    end = (int)blob->len;
   }
 
   list = pic_nil_value();