libvpx: Pull from upstream

source/libvpx/third_party/nestegg/src/nestegg.c

Index: source/libvpx/third_party/nestegg/src/nestegg.c
===================================================================
--- source/libvpx/third_party/nestegg/src/nestegg.c	(revision 263011)
+++ source/libvpx/third_party/nestegg/src/nestegg.c	(working copy)
@@ -694,14 +694,15 @@
 {
   char * str;
   int r;
+  const size_t alloc_size = (size_t)length + 1;
 
   if (length == 0 || length > LIMIT_STRING)
     return -1;
-  str = ne_pool_alloc(length + 1, ctx->alloc_pool);
-  r = ne_io_read(ctx->io, (unsigned char *) str, length);
+  str = ne_pool_alloc(alloc_size, ctx->alloc_pool);
+  r = ne_io_read(ctx->io, (unsigned char *) str, alloc_size - 1);
   if (r != 1)
     return r;
-  str[length] = '\0';
+  str[alloc_size - 1] = '\0';
   *val = str;
   return 1;
 }
@@ -711,9 +712,9 @@
 {
   if (length == 0 || length > LIMIT_BINARY)
     return -1;
-  val->data = ne_pool_alloc(length, ctx->alloc_pool);
-  val->length = length;
-  return ne_io_read(ctx->io, val->data, length);
+  val->length = (size_t)length;
+  val->data = ne_pool_alloc(val->length, ctx->alloc_pool);
+  return ne_io_read(ctx->io, val->data, val->length);
 }
 
 static int
@@ -1043,7 +1044,7 @@
           ne_read_single_master(ctx, element);
         continue;
       } else {
-        r = ne_read_simple(ctx, element, size);
+        r = ne_read_simple(ctx, element, (size_t)size);
         if (r < 0)
           break;
       }
@@ -1062,7 +1063,7 @@
 
       if (id != ID_VOID && id != ID_CRC32)
         ctx->log(ctx, NESTEGG_LOG_DEBUG, "unknown element %llx", id);
-      r = ne_io_read_skip(ctx->io, size);
+      r = ne_io_read_skip(ctx->io, (size_t)size);
       if (r != 1)
         break;
     }
@@ -1151,7 +1152,8 @@
   r = ne_read_vint(io, &lace, &length);
   if (r != 1)
     return r;
-  *read += length;
+  assert(length <= 8);
+  *read += (size_t)length;
 
   sizes[i] = lace;
   sum = sizes[i];
@@ -1163,7 +1165,8 @@
     r = ne_read_svint(io, &slace, &length);
     if (r != 1)
       return r;
-    *read += length;
+    assert(length <= 8);
+    *read += (size_t)length;
     sizes[i] = sizes[i - 1] + slace;
     sum += sizes[i];
     i += 1;
@@ -1263,7 +1266,8 @@
   if (track_number == 0 || (unsigned int)track_number != track_number)
     return -1;
 
-  consumed += length;
+  assert(length <= 8);
+  consumed += (size_t)length;
 
   r = ne_read_int(ctx->io, &timecode, 2);
   if (r != 1)
@@ -1307,7 +1311,7 @@
   case LACING_XIPH:
     if (frames == 1)
       return -1;
-    r = ne_read_xiph_lacing(ctx->io, block_size, &consumed, frames, frame_sizes);
+    r = ne_read_xiph_lacing(ctx->io, (size_t)block_size, &consumed, frames, frame_sizes);
     if (r != 1)
       return r;
     break;
@@ -1320,7 +1324,7 @@
   case LACING_EBML:
     if (frames == 1)
       return -1;
-    r = ne_read_ebml_lacing(ctx->io, block_size, &consumed, frames, frame_sizes);
+    r = ne_read_ebml_lacing(ctx->io, (size_t)block_size, &consumed, frames, frame_sizes);
     if (r != 1)
       return r;
     break;
@@ -1365,9 +1369,9 @@
       return -1;
     }
     f = ne_alloc(sizeof(*f));
-    f->data = ne_alloc(frame_sizes[i]);
-    f->length = frame_sizes[i];
-    r = ne_io_read(ctx->io, f->data, frame_sizes[i]);
+    f->length = (size_t)frame_sizes[i];
+    f->data = ne_alloc(f->length);
+    r = ne_io_read(ctx->io, f->data, f->length);
     if (r != 1) {
       free(f->data);
       free(f);
@@ -1406,7 +1410,8 @@
   if (!element)
     return 1;
 
-  r = ne_read_simple(ctx, element, size);
+  assert((size_t)size == size);
+  r = ne_read_simple(ctx, element, (size_t)size);
   if (r != 1)
     return r;
   storage = (struct ebml_type *) (ctx->ancestor->data + element->offset);
@@ -1600,7 +1605,7 @@
   struct sniff_buffer * sb = user_data;
 
   int rv = 1;
-  size_t available = sb->length - sb->offset;
+  size_t available = sb->length - (size_t)sb->offset;
 
   if (available < length)
     return 0;
@@ -2074,7 +2079,7 @@
         p += sizes[i];
       }
       *data = p;
-      *length = sizes[item];
+      *length = (size_t)sizes[item];
   } else {
     *data = codec_private.data;
     *length = codec_private.length;