#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Format.h"
-#include "llvm/System/Program.h"
-#include "llvm/System/Process.h"
+#include "llvm/Support/Program.h"
+#include "llvm/Support/Process.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/System/Signals.h"
#include "llvm/ADT/STLExtras.h"
#include <cctype>
#include <cerrno>
#if defined(HAVE_FCNTL_H)
# include <fcntl.h>
#endif
+#if defined(HAVE_SYS_UIO_H) && defined(HAVE_WRITEV)
+# include <sys/uio.h>
+#endif
+
+#if defined(__CYGWIN__)
+#include <io.h>
+#endif
#if defined(_MSC_VER)
#include <io.h>
return write(CurPtr, EndPtr-CurPtr);
}
-raw_ostream &raw_ostream::write_escaped(StringRef Str) {
+raw_ostream &raw_ostream::write_escaped(StringRef Str,
+ bool UseHexEscapes) {
for (unsigned i = 0, e = Str.size(); i != e; ++i) {
unsigned char c = Str[i];
break;
}
- // Always expand to a 3-character octal escape.
- *this << '\\';
- *this << char('0' + ((c >> 6) & 7));
- *this << char('0' + ((c >> 3) & 7));
- *this << char('0' + ((c >> 0) & 7));
+ // Write out the escaped representation.
+ if (UseHexEscapes) {
+ *this << '\\' << 'x';
+ *this << hexdigit((c >> 4 & 0xF));
+ *this << hexdigit((c >> 0) & 0xF);
+ } else {
+ // Always use a full 3-character octal escape.
+ *this << '\\';
+ *this << char('0' + ((c >> 6) & 7));
+ *this << char('0' + ((c >> 3) & 7));
+ *this << char('0' + ((c >> 0) & 7));
+ }
}
}
/// stream should be immediately destroyed; the string will be empty
/// if no error occurred.
raw_fd_ostream::raw_fd_ostream(const char *Filename, std::string &ErrorInfo,
- unsigned Flags) : Error(false), pos(0) {
+ unsigned Flags)
+ : Error(false), UseAtomicWrites(false), pos(0)
+{
assert(Filename != 0 && "Filename is null");
// Verify that we don't have both "append" and "excl".
assert((!(Flags & F_Excl) || !(Flags & F_Append)) &&
ShouldClose = true;
}
+/// raw_fd_ostream ctor - FD is the file descriptor that this writes to. If
+/// ShouldClose is true, this closes the file when the stream is destroyed.
+raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered)
+ : raw_ostream(unbuffered), FD(fd),
+ ShouldClose(shouldClose), Error(false), UseAtomicWrites(false) {
+#ifdef O_BINARY
+ // Setting STDOUT and STDERR to binary mode is necessary in Win32
+ // to avoid undesirable linefeed conversion.
+ if (fd == STDOUT_FILENO || fd == STDERR_FILENO)
+ setmode(fd, O_BINARY);
+#endif
+
+ // Get the starting position.
+ off_t loc = ::lseek(FD, 0, SEEK_CUR);
+ if (loc == (off_t)-1)
+ pos = 0;
+ else
+ pos = static_cast<uint64_t>(loc);
+}
+
raw_fd_ostream::~raw_fd_ostream() {
if (FD >= 0) {
flush();
pos += Size;
do {
- ssize_t ret = ::write(FD, Ptr, Size);
+ ssize_t ret;
+
+ // Check whether we should attempt to use atomic writes.
+ if (BUILTIN_EXPECT(!UseAtomicWrites, true)) {
+ ret = ::write(FD, Ptr, Size);
+ } else {
+ // Use ::writev() where available.
+#if defined(HAVE_WRITEV)
+ struct iovec IOV = { (void*) Ptr, Size };
+ ret = ::writev(FD, &IOV, 1);
+#else
+ ret = ::write(FD, Ptr, Size);
+#endif
+ }
if (ret < 0) {
// If it's a recoverable error, swallow it and retry the write.
}
//===----------------------------------------------------------------------===//
-// raw_stdout/err_ostream
+// outs(), errs(), nulls()
//===----------------------------------------------------------------------===//
-// Set buffer settings to model stdout and stderr behavior.
-// Set standard error to be unbuffered by default.
-raw_stdout_ostream::raw_stdout_ostream():raw_fd_ostream(STDOUT_FILENO, false) {}
-raw_stderr_ostream::raw_stderr_ostream():raw_fd_ostream(STDERR_FILENO, false,
- true) {}
-
-// An out of line virtual method to provide a home for the class vtable.
-void raw_stdout_ostream::handle() {}
-void raw_stderr_ostream::handle() {}
-
/// outs() - This returns a reference to a raw_ostream for standard output.
/// Use it like: outs() << "foo" << "bar";
raw_ostream &llvm::outs() {
- static raw_stdout_ostream S;
+ // Set buffer settings to model stdout behavior.
+ // Delete the file descriptor when the program exists, forcing error
+ // detection. If you don't want this behavior, don't use outs().
+ static raw_fd_ostream S(STDOUT_FILENO, true);
return S;
}
/// errs() - This returns a reference to a raw_ostream for standard error.
/// Use it like: errs() << "foo" << "bar";
raw_ostream &llvm::errs() {
- static raw_stderr_ostream S;
+ // Set standard error to be unbuffered by default.
+ static raw_fd_ostream S(STDERR_FILENO, false, true);
return S;
}
uint64_t raw_null_ostream::current_pos() const {
return 0;
}
-
-//===----------------------------------------------------------------------===//
-// tool_output_file
-//===----------------------------------------------------------------------===//
-
-/// SetupRemoveOnSignal - This is a helper for tool_output_file's constructor
-/// to allow the signal handlers to be installed before constructing the
-/// base class raw_fd_ostream.
-static const char *SetupRemoveOnSignal(const char *Filename) {
- // Arrange for the file to be deleted if the process is killed.
- if (strcmp(Filename, "-") != 0)
- sys::RemoveFileOnSignal(sys::Path(Filename));
- return Filename;
-}
-
-tool_output_file::tool_output_file(const char *filename, std::string &ErrorInfo,
- unsigned Flags)
- : raw_fd_ostream(SetupRemoveOnSignal(filename), ErrorInfo, Flags),
- Filename(filename),
- Keep(!ErrorInfo.empty() /* If open fails, no cleanup is needed. */) {
-}
-
-tool_output_file::~tool_output_file() {
- // Delete the file if the client hasn't told us not to.
- if (!Keep && Filename != "-")
- sys::Path(Filename).eraseFromDisk();
-}
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