Submodules are evil. Undo it.

1 files changed, 110 insertions, 0 deletions

diff --git a/util/file.hh b/util/file.hh
new file mode 100644
index 000000000..185cb1f31
--- /dev/null
+++ b/util/file.hh
@@ -0,0 +1,110 @@
+#ifndef UTIL_FILE__
+#define UTIL_FILE__
+
+#include <cstddef>
+#include <cstdio>
+#include <string>
+
+#include <stdint.h>
+
+namespace util {
+
+class scoped_fd {
+  public:
+    scoped_fd() : fd_(-1) {}
+
+    explicit scoped_fd(int fd) : fd_(fd) {}
+
+    ~scoped_fd();
+
+    void reset(int to) {
+      scoped_fd other(fd_);
+      fd_ = to;
+    }
+
+    int get() const { return fd_; }
+
+    int operator*() const { return fd_; }
+
+    int release() {
+      int ret = fd_;
+      fd_ = -1;
+      return ret;
+    }
+
+    operator bool() { return fd_ != -1; }
+
+  private:
+    int fd_;
+
+    scoped_fd(const scoped_fd &);
+    scoped_fd &operator=(const scoped_fd &);
+};
+
+class scoped_FILE {
+  public:
+    explicit scoped_FILE(std::FILE *file = NULL) : file_(file) {}
+
+    ~scoped_FILE();
+
+    std::FILE *get() { return file_; }
+    const std::FILE *get() const { return file_; }
+
+    void reset(std::FILE *to = NULL) {
+      scoped_FILE other(file_);
+      file_ = to;
+    }
+
+    std::FILE *release() {
+      std::FILE *ret = file_;
+      file_ = NULL;
+      return ret;
+    }
+
+  private:
+    std::FILE *file_;
+};
+
+// Open for read only.  
+int OpenReadOrThrow(const char *name);
+// Create file if it doesn't exist, truncate if it does.  Opened for write.   
+int CreateOrThrow(const char *name);
+
+// Return value for SizeFile when it can't size properly.  
+const uint64_t kBadSize = (uint64_t)-1;
+uint64_t SizeFile(int fd);
+
+void ResizeOrThrow(int fd, uint64_t to);
+
+void ReadOrThrow(int fd, void *to, std::size_t size);
+std::size_t ReadOrEOF(int fd, void *to_void, std::size_t amount);
+
+void WriteOrThrow(int fd, const void *data_void, std::size_t size);
+void WriteOrThrow(FILE *to, const void *data, std::size_t size);
+
+void FSyncOrThrow(int fd);
+
+// Seeking
+void SeekOrThrow(int fd, uint64_t off);
+void AdvanceOrThrow(int fd, int64_t off);
+void SeekEnd(int fd);
+
+std::FILE *FDOpenOrThrow(scoped_fd &file);
+
+std::FILE *FOpenOrThrow(const char *path, const char *mode);
+
+class TempMaker {
+  public:
+    explicit TempMaker(const std::string &prefix);
+
+    // These will already be unlinked for you.  
+    int Make() const;
+    std::FILE *MakeFile() const;
+
+  private:
+    std::string base_;
+};
+
+} // namespace util
+
+#endif // UTIL_FILE__