windows support + ci

.github/workflows/build-windows.yml

@@ -0,0 +1,34 @@
+name: build-windows
+
+on:
+    push:
+        branches: [ master ]
+    pull_request:
+        branches: [ master ]
+
+jobs:
+    windows:
+        runs-on: ${{ matrix.os }}
+        strategy:
+            matrix:
+                os: [windows-2022, windows-2019]
+                swift: [5.6.2]
+        steps:
+            -   name: checkout 
+                uses: actions/checkout@v2
+
+            -   name: toolchain 
+                uses: compnerd/gha-setup-swift@v0.0.1
+                with:
+                    branch: swift-${{ matrix.swift }}-release
+                    tag: ${{ matrix.swift }}-RELEASE
+            -   name: build 
+                run: |
+                    swift --version
+                    swift build
+            -   name: test 
+                run: |
+                    swift --version
+                    swift run -c debug PNGTests
+                    swift run -c release PNGIntegrationTests
+                    swift run -c release PNGCompressionTests

README.md

@@ -1,16 +1,16 @@
-<p align="center">
-  <a href="https://swift.org"><img alt="platforms: all" src="https://img.shields.io/badge/platforms-all-lightgrey.svg"/></a>
-  <a href="https://github.com/kelvin13/swift-png/releases"><img alt="releases" src="https://img.shields.io/github/v/release/kelvin13/swift-png"/></a>
-  <a href="https://github.com/kelvin13/swift-png/actions?query=workflow%3Abuild"><img alt="build status" src="https://img.shields.io/github/workflow/status/kelvin13/swift-png/documentation/master?label=build"/></a>
-  <a href="https://github.com/kelvin13/swift-png/actions?query=workflow%3Adocumentation"><img alt="documentation status" src="https://img.shields.io/github/workflow/status/kelvin13/swift-png/documentation/master?label=build%20docs"/></a>
-  <a href="https://github.com/kelvin13/swift-png/issues?state=open"><img alt="issues" src="https://img.shields.io/github/issues/kelvin13/swift-png"/></a>
-  <a href="https://swift.org"><img alt="language" src="https://img.shields.io/badge/version-swift_5.5-ffa020.svg"/></a>
-  <a href="https://github.com/kelvin13/swift-png/blob/master/LICENSE"><img alt="license: mpl2" src="https://img.shields.io/badge/license-MPL2-ff3079.svg"/></a>
-</p>
-
-<p align="center">
-  <em><code>png</code></em><br/><code>4.0.2</code>
-</p>
+<div align="center">
+
+***`png`***<br>`4.1.0`
+
+[![ci status](https://github.com/kelvin13/swift-png/actions/workflows/build.yml/badge.svg)](https://github.com/kelvin13/swift-png/actions/workflows/build.yml)
+[![ci status](https://github.com/kelvin13/swift-png/actions/workflows/build-devices.yml/badge.svg)](https://github.com/kelvin13/swift-png/actions/workflows/build-devices.yml)
+[![ci status](https://github.com/kelvin13/swift-png/actions/workflows/build-windows.yml/badge.svg)](https://github.com/kelvin13/swift-png/actions/workflows/build-windows.yml)
+
+
+[![swift package index versions](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fkelvin13%2Fswift-hash%2Fbadge%3Ftype%3Dswift-versions)](https://swiftpackageindex.com/kelvin13/swift-png)
+[![swift package index platforms](https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2Fkelvin13%2Fswift-hash%2Fbadge%3Ftype%3Dplatforms)](https://swiftpackageindex.com/kelvin13/swift-png)
+
+</div>
 
 *Swift PNG* is a pure, cross-platform Swift framework for decoding, inspecting, editing, and encoding PNG images. The framework does not depend on *Foundation* or any other packages, and will compile and provide consistent behavior on all Swift platforms. *Swift PNG* also comes with built-in file system support on Linux and MacOS.
 

Sources/PNG/LZ77/General.Dictionary.swift

@@ -1,4 +1,6 @@
-#if arch(x86_64) && !NO_INTRINSICS
+// https://github.com/apple/swift/issues/60534
+// https://forums.swift.org/t/builtin-intrinsics-intel-module-is-not-available-on-windows-pc-with-intel-cpu/61862
+#if arch(x86_64) && !NO_INTRINSICS && !os(Windows)
 
 import _Builtin_intrinsics.intel
 

Sources/PNG/System.swift

@@ -6,11 +6,14 @@
     import Darwin
 #elseif os(Linux)
     import Glibc
+#elseif os(Windows)
+    #warning("Windows in not oficially supported and is untested platform (please open an issue at https://github.com/kelvin13/swift-png/issues)")
+    import ucrt
 #else
     #warning("unsupported or untested platform (please open an issue at https://github.com/kelvin13/swift-png/issues)")
 #endif
 
-#if os(macOS) || os(Linux)
+#if os(macOS) || os(Linux) || os(Windows)
 
 /// enum System 
 ///     A namespace for platform-dependent functionality.
@@ -155,13 +158,23 @@ extension System.File.Source
             return nil 
         }
 
+        #if os(Windows)
+        switch Int32.init(status.st_mode) & S_IFMT 
+        {
+        case S_IFREG:
+            break 
+        default:
+            return nil 
+        }
+        #else
         switch status.st_mode & S_IFMT 
         {
         case S_IFREG, S_IFLNK:
             break 
         default:
             return nil 
         }
+        #endif
 
         return Int.init(status.st_size)
     }