DevFS initial implementation

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index 254d829e5bfcc3b60beeaed579d4231348b05583..b3ff7b749a7805b26a3d1fe4b1576ad0391fc160 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -16,6 +16,7 @@
 #include "vm/dart_api_state.h"
 #include "vm/dart_entry.h"
 #include "vm/debugger.h"
+#include "vm/dev_fs.h"
 #include "vm/exceptions.h"
 #include "vm/flags.h"
 #include "vm/growable_array.h"
@@ -5895,6 +5896,80 @@ DART_EXPORT Dart_Handle Dart_ServiceSendDataEvent(const char* stream_id,
 }
 
 
+DART_EXPORT bool Dart_IsDevFSUri(Dart_Handle uri) {
+  DARTSCOPE(Thread::Current());
+  const String& uri_string = Api::UnwrapStringHandle(Z, uri);
+  if (uri_string.IsNull()) {
+    return false;
+  }
+  ParsedUri parsed_uri;
+  if (!ParseUri(uri_string.ToCString(), &parsed_uri)) {
+    return false;
+  }
+  if ((parsed_uri.scheme == NULL) ||
+      (strcmp(parsed_uri.scheme, "dart-devfs") != 0)) {
+    return false;
+  }
+  return true;
+}
+
+
+DART_EXPORT Dart_Handle Dart_DevFSReadFile(Dart_Handle uri) {
+  DARTSCOPE(Thread::Current());
+  const String& uri_string = Api::UnwrapStringHandle(Z, uri);
+  if (uri_string.IsNull()) {
+    RETURN_TYPE_ERROR(Z, uri, String);
+  }
+  ParsedUri parsed_uri;
+  if (!ParseUri(uri_string.ToCString(), &parsed_uri)) {
+    return Api::NewError("%s: Unable to parse uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  if ((parsed_uri.scheme == NULL) ||
+      (strcmp(parsed_uri.scheme, "dart-devfs") != 0)) {
+    return Api::NewError("%s: Not a dart-devfs uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  if (parsed_uri.host == NULL) {
+    return Api::NewError("%s: Invalid dart-devfs uri '%s'.",

[turnidge, 2016/06/10 18:45:34]

Make error message better. "No authority specified in...

+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  if (parsed_uri.path == NULL) {
+    return Api::NewError("%s: No path specified in dart-devfs uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  return DevFS::ReadFile(parsed_uri.host, parsed_uri.path);
+}
+
+
+DART_EXPORT Dart_Handle Dart_DevFSReadFileAsUTF8String(Dart_Handle uri) {
+  DARTSCOPE(Thread::Current());
+  const String& uri_string = Api::UnwrapStringHandle(Z, uri);
+  if (uri_string.IsNull()) {
+    RETURN_TYPE_ERROR(Z, uri, String);
+  }
+  ParsedUri parsed_uri;
+  if (!ParseUri(uri_string.ToCString(), &parsed_uri)) {
+    return Api::NewError("%s: Unable to parse uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  if ((parsed_uri.scheme == NULL) ||
+      (strcmp(parsed_uri.scheme, "dart-devfs") != 0)) {
+    return Api::NewError("%s: Not a dart-devfs uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  if (parsed_uri.host == NULL) {
+    return Api::NewError("%s: Invalid dart-devfs uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  if (parsed_uri.path == NULL) {
+    return Api::NewError("%s: No path specified in dart-devfs uri '%s'.",
+                         CURRENT_FUNC, uri_string.ToCString());
+  }
+  return DevFS::ReadFileAsString(parsed_uri.host, parsed_uri.path);
+}
+
+
 DART_EXPORT int64_t Dart_TimelineGetMicros() {
   return OS::GetCurrentMonotonicMicros();
 }