Fixed file mode

Author: fzhinkin

core/common/src/files/Paths.kt

@@ -11,6 +11,8 @@ import kotlinx.io.Source
 /**
  * A wrapper around a string representing a file path allowing to read from and write to a
  * corresponding file using [Sink] and [Source].
+ *
+ * **This API is unstable and subject to change.**
  */
 public expect class Path
 

core/native/src/files/PathsNative.kt

@@ -19,13 +19,13 @@ public actual class Path internal constructor(internal val path: String,
 public actual fun Path(path: String): Path = Path(path, null)
 
 public actual fun Path.source(): Source {
-    val openFile: CPointer<FILE> = fopen(path, "r")
+    val openFile: CPointer<FILE> = fopen(path, "rb")
         ?: throw IOException("Failed to open $path with ${strerror(errno)?.toKString()}")
     return FileSource(openFile).buffered()
 }
 
 public actual fun Path.sink(): Sink {
-    val openFile: CPointer<FILE> = fopen(path, "w")
+    val openFile: CPointer<FILE> = fopen(path, "wb")
         ?: throw IOException("Failed to open $path with ${strerror(errno)?.toKString()}")
     return FileSink(openFile).buffered()
 }