fix typo

[oota-llvm.git] / lib / Support / DataStream.cpp

diff --git a/lib/Support/DataStream.cpp b/lib/Support/DataStream.cpp
index b2dd979e7f1169e90f3b5d450ef57c527737e90f..3b10fc5eecaa3442e40da172429a5573a4e43be9 100644 (file)
--- a/lib/Support/DataStream.cpp
+++ b/lib/Support/DataStream.cpp
@@ -14,29 +14,29 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "Data-stream"
-#include "llvm/ADT/Statistic.h"
 #include "llvm/Support/DataStream.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Program.h"
-#include "llvm/Support/system_error.h"
 #include <string>
-#include <cerrno>
-#include <cstdio>
+#include <system_error>
 #if !defined(_MSC_VER) && !defined(__MINGW32__)
 #include <unistd.h>
 #else
 #include <io.h>
 #endif
-#include <fcntl.h>
 using namespace llvm;
 
+#define DEBUG_TYPE "Data-stream"
+
 // Interface goals:
-// * StreamableMemoryObject doesn't care about complexities like using
+// * StreamingMemoryObject doesn't care about complexities like using
 //   threads/async callbacks to actually overlap download+compile
 // * Don't want to duplicate Data in memory
 // * Don't need to know total Data len in advance
 // Non-goals:
-// StreamableMemoryObject already has random access so this interface only does
+// StreamingMemoryObject already has random access so this interface only does
 // in-order streaming (no arbitrary seeking, else we'd have to buffer all the
 // Data here in addition to MemoryObject).  This also means that if we want
 // to be able to to free Data, BitstreamBytes/BitcodeReader will implement it
@@ -49,51 +49,38 @@ DataStreamer::~DataStreamer() {}
 
 namespace {
 
-const static error_code success;
-
 // Very simple stream backed by a file. Mostly useful for stdin and debugging;
 // actual file access is probably still best done with mmap.
 class DataFileStreamer : public DataStreamer {
  int Fd;
 public:
   DataFileStreamer() : Fd(0) {}
-  virtual ~DataFileStreamer() {
-    close(Fd);
-  }
-  virtual size_t GetBytes(unsigned char *buf, size_t len) {
+  ~DataFileStreamer() override { close(Fd); }
+  size_t GetBytes(unsigned char *buf, size_t len) override {
     NumStreamFetches++;
     return read(Fd, buf, len);
   }
 
-  error_code OpenFile(const std::string &Filename) {
-    int OpenFlags = O_RDONLY;
-#ifdef O_BINARY
-    OpenFlags |= O_BINARY;  // Open input file in binary mode on win32.
-#endif
+  std::error_code OpenFile(const std::string &Filename) {
     if (Filename == "-") {
       Fd = 0;
-      sys::Program::ChangeStdinToBinary();
+      sys::ChangeStdinToBinary();
+      return std::error_code();
     }
-    else
-      Fd = ::open(Filename.c_str(), OpenFlags);
-    if (Fd == -1) return error_code(errno, posix_category());
-      return success;
+
+    return sys::fs::openFileForRead(Filename, Fd);
   }
 };
 
 }
 
-namespace llvm {
-DataStreamer *getDataFileStreamer(const std::string &Filename,
-                                  std::string *StrError) {
-  DataFileStreamer *s = new DataFileStreamer();
-  error_code e = s->OpenFile(Filename);
-  if (e != success) {
+std::unique_ptr<DataStreamer>
+llvm::getDataFileStreamer(const std::string &Filename, std::string *StrError) {
+  std::unique_ptr<DataFileStreamer> s = make_unique<DataFileStreamer>();
+  if (std::error_code e = s->OpenFile(Filename)) {
     *StrError = std::string("Could not open ") + Filename + ": " +
         e.message() + "\n";
-    return NULL;
+    return nullptr;
   }
-  return s;
-}
-
+  return std::move(s);
 }