Change the type of size to be u64

README.md

@@ -48,14 +48,14 @@ use oci_spec::image::{
 
 let config = DescriptorBuilder::default()
             .media_type(MediaType::ImageConfig)
-            .size(7023)
+            .size(7023u64)
             .digest("sha256:b5b2b2c507a0944348e0303114d8d93aaaa081732b86451d9bce1f432a537bc7")
             .build()
             .expect("build config descriptor");
 
 let layers: Vec<Descriptor> = [
     (
-        32654,
+        32654u64,
         "sha256:9834876dcfb05cb167a5c24953eba58c4ac89b1adf57f28f2f9d09af107ee8f0",
     ),
     (

src/image/artifact.rs

@@ -226,7 +226,7 @@ mod tests {
     fn create_manifest() -> ArtifactManifest {
         let blob = DescriptorBuilder::default()
             .media_type(MediaType::Other("application/gzip".to_string()))
-            .size(123)
+            .size(123u64)
             .digest(
                 "sha256:87923725d74f4bfb94c9e86d64170f7521aad8221a5de834851470ca142da630"
                     .to_string(),
@@ -235,7 +235,7 @@ mod tests {
             .unwrap();
         let subject = DescriptorBuilder::default()
             .media_type(MediaType::ImageManifest)
-            .size(1234)
+            .size(1234u64)
             .digest(
                 "sha256:cc06a2839488b8bd2a2b99dcdc03d5cfd818eed72ad08ef3cc197aac64c0d0a0"
                     .to_string(),

src/image/descriptor.rs

@@ -37,7 +37,7 @@ pub struct Descriptor {
     /// length of the retrieved content does not match the specified
     /// length, the content SHOULD NOT be trusted.
     #[getset(get_copy = "pub", set = "pub")]
-    size: i64,
+    size: u64,
     /// This OPTIONAL property specifies a list of URIs from which this
     /// object MAY be downloaded. Each entry MUST conform to [RFC 3986](https://tools.ietf.org/html/rfc3986).
     /// Entries SHOULD use the http and https schemes, as defined
@@ -133,7 +133,7 @@ pub struct Platform {
 
 impl Descriptor {
     /// Construct a new descriptor with the required fields.
-    pub fn new(media_type: MediaType, size: i64, digest: impl Into<String>) -> Self {
+    pub fn new(media_type: MediaType, size: u64, digest: impl Into<String>) -> Self {
         Self {
             media_type,
             size,

src/image/index.rs

@@ -239,7 +239,7 @@ mod tests {
         let ppc_manifest = DescriptorBuilder::default()
             .media_type(MediaType::ImageManifest)
             .digest("sha256:e692418e4cbaf90ca69d05a66403747baa33ee08806650b51fab815ad7fc331f")
-            .size(7143)
+            .size(7143u64)
             .platform(
                 PlatformBuilder::default()
                     .architecture(Arch::PowerPC64le)
@@ -253,7 +253,7 @@ mod tests {
         let amd64_manifest = DescriptorBuilder::default()
             .media_type(MediaType::ImageManifest)
             .digest("sha256:5b0bcabd1ed22e9fb1310cf6c2dec7cdef19f0ad69efa1f392e94a4333501270")
-            .size(7682)
+            .size(7682u64)
             .platform(
                 PlatformBuilder::default()
                     .architecture(Arch::Amd64)

src/image/manifest.rs

@@ -251,14 +251,14 @@ mod tests {
 
         let config = DescriptorBuilder::default()
             .media_type(MediaType::ImageConfig)
-            .size(7023)
+            .size(7023u64)
             .digest("sha256:b5b2b2c507a0944348e0303114d8d93aaaa081732b86451d9bce1f432a537bc7")
             .build()
             .expect("build config descriptor");
 
         let layers: Vec<Descriptor> = [
             (
-                32654,
+                32654u64,
                 "sha256:9834876dcfb05cb167a5c24953eba58c4ac89b1adf57f28f2f9d09af107ee8f0",
             ),
             (