// Wrapper of C-language FILE struct -*- C++ -*-
-// Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+// Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
#include <bits/basic_file.h>
#include <fcntl.h>
-#include <unistd.h>
#include <errno.h>
+#ifdef _GLIBCXX_HAVE_POLL
+#include <poll.h>
+#endif
+
+// Pick up ioctl on Solaris 2.8
+#ifdef _GLIBCXX_HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+// Pick up FIONREAD on Solaris 2
+#ifdef _GLIBCXX_HAVE_SYS_IOCTL_H
+#define BSD_COMP
+#include <sys/ioctl.h>
+#endif
+
+// Pick up FIONREAD on Solaris 2.5.
+#ifdef _GLIBCXX_HAVE_SYS_FILIO_H
+#include <sys/filio.h>
+#endif
+
+#ifdef _GLIBCXX_HAVE_SYS_UIO_H
+#include <sys/uio.h>
+#endif
+
+#if defined(_GLIBCXX_HAVE_S_ISREG) || defined(_GLIBCXX_HAVE_S_IFREG)
+# include <sys/stat.h>
+# ifdef _GLIBCXX_HAVE_S_ISREG
+# define _GLIBCXX_ISREG(x) S_ISREG(x)
+# else
+# define _GLIBCXX_ISREG(x) (((x) & S_IFMT) == S_IFREG)
+# endif
+#endif
+
+#include <limits> // For <off_t>::max() and min()
+
+namespace __gnu_internal
+{
+ // Map ios_base::openmode flags to a string for use in fopen().
+ // Table of valid combinations as given in [lib.filebuf.members]/2.
+ static const char*
+ fopen_mode(std::ios_base::openmode mode)
+ {
+ enum
+ {
+ in = std::ios_base::in,
+ out = std::ios_base::out,
+ trunc = std::ios_base::trunc,
+ app = std::ios_base::app,
+ binary = std::ios_base::binary
+ };
+
+ switch (mode & (in|out|trunc|app|binary))
+ {
+ case ( out ): return "w";
+ case ( out |app ): return "a";
+ case ( out|trunc ): return "w";
+ case (in ): return "r";
+ case (in|out ): return "r+";
+ case (in|out|trunc ): return "w+";
+
+ case ( out |binary): return "wb";
+ case ( out |app|binary): return "ab";
+ case ( out|trunc |binary): return "wb";
+ case (in |binary): return "rb";
+ case (in|out |binary): return "r+b";
+ case (in|out|trunc |binary): return "w+b";
+
+ default: return 0; // invalid
+ }
+ }
+} // namespace __gnu_internal
+
namespace std
{
// Definitions for __basic_file<char>.
__basic_file<char>::~__basic_file()
{ this->close(); }
- void
- __basic_file<char>::_M_open_mode(ios_base::openmode __mode, int& __p_mode,
- int&, char* __c_mode)
- {
- bool __testb = __mode & ios_base::binary;
- bool __testi = __mode & ios_base::in;
- bool __testo = __mode & ios_base::out;
- bool __testt = __mode & ios_base::trunc;
- bool __testa = __mode & ios_base::app;
-
- // Set __c_mode for use in fopen.
- // Set __p_mode for use in open.
- if (!__testi && __testo && !__testt && !__testa)
- {
- strcpy(__c_mode, "w");
- __p_mode = (O_WRONLY | O_CREAT);
- }
- if (!__testi && __testo && !__testt && __testa)
- {
- strcpy(__c_mode, "a");
- __p_mode |= O_WRONLY | O_CREAT | O_APPEND;
- }
- if (!__testi && __testo && __testt && !__testa)
- {
- strcpy(__c_mode, "w");
- __p_mode |= O_WRONLY | O_CREAT | O_TRUNC;
- }
-
- if (__testi && !__testo && !__testt && !__testa)
- {
- strcpy(__c_mode, "r");
-#if defined (O_NONBLOCK)
- __p_mode |= O_RDONLY | O_NONBLOCK;
-#else
- __p_mode |= O_RDONLY;
-#endif
- }
- if (__testi && __testo && !__testt && !__testa)
- {
- strcpy(__c_mode, "r+");
- __p_mode |= O_RDWR | O_CREAT;
- }
- if (__testi && __testo && __testt && !__testa)
- {
- strcpy(__c_mode, "w+");
- __p_mode |= O_RDWR | O_CREAT | O_TRUNC;
- }
- if (__testb)
- strcat(__c_mode, "b");
- }
-
__basic_file<char>*
__basic_file<char>::sys_open(__c_file* __file, ios_base::openmode)
{
{
_M_cfile = __file;
_M_cfile_created = false;
+ this->sync();
__ret = this;
}
return __ret;
}
__basic_file<char>*
- __basic_file<char>::sys_open(int __fd, ios_base::openmode __mode,
- bool __del)
+ __basic_file<char>::sys_open(int __fd, ios_base::openmode __mode)
{
__basic_file* __ret = NULL;
- int __p_mode = 0;
- int __rw_mode = 0;
- char __c_mode[4];
-
- _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
- if (!this->is_open() && (_M_cfile = fdopen(__fd, __c_mode)))
+ const char* __c_mode = __gnu_internal::fopen_mode(__mode);
+ if (__c_mode && !this->is_open()
+ && (_M_cfile = fdopen(__fd, __c_mode)))
{
- // Iff __del is true, then close will fclose the fd.
- _M_cfile_created = __del;
-
+ _M_cfile_created = true;
if (__fd == 0)
setvbuf(_M_cfile, reinterpret_cast<char*>(NULL), _IONBF, 0);
-
__ret = this;
}
return __ret;
}
-
- int
- __basic_file<char>::sys_getc()
- { return getc(_M_cfile); }
-
- int
- __basic_file<char>::sys_ungetc(int __c)
- { return ungetc(__c, _M_cfile); }
__basic_file<char>*
__basic_file<char>::open(const char* __name, ios_base::openmode __mode,
int /*__prot*/)
{
__basic_file* __ret = NULL;
- int __p_mode = 0;
- int __rw_mode = 0;
- char __c_mode[4];
-
- _M_open_mode(__mode, __p_mode, __rw_mode, __c_mode);
-
- if (!this->is_open())
+ const char* __c_mode = __gnu_internal::fopen_mode(__mode);
+ if (__c_mode && !this->is_open())
{
+#ifdef _GLIBCXX_USE_LFS
+ if ((_M_cfile = fopen64(__name, __c_mode)))
+#else
if ((_M_cfile = fopen(__name, __c_mode)))
+#endif
{
_M_cfile_created = true;
-
-#if defined (F_SETFL) && defined (O_NONBLOCK)
- // Set input to nonblocking for fifos.
- if (__mode & ios_base::in)
- fcntl(this->fd(), F_SETFL, O_NONBLOCK);
-#endif
-
__ret = this;
}
}
__basic_file<char>*
__basic_file<char>::close()
{
- __basic_file* __retval = static_cast<__basic_file*>(NULL);
+ __basic_file* __ret = static_cast<__basic_file*>(NULL);
if (this->is_open())
{
- fflush(_M_cfile);
- if ((_M_cfile_created && fclose(_M_cfile) == 0) || !_M_cfile_created)
- {
- _M_cfile = 0;
- __retval = this;
- }
+ if (_M_cfile_created)
+ fclose(_M_cfile);
+ else
+ this->sync();
+ _M_cfile = 0;
+ __ret = this;
}
- return __retval;
+ return __ret;
}
- // In the next four functions we want to use stdio functions only
- // when synced with stdio (_M_buf_size == 1): I/O primitives do not
- // block until the asked number of bytes are available.
streamsize
- __basic_file<char>::xsgetn(char* __s, streamsize __n, bool __stdio)
+ __basic_file<char>::xsgetn(char* __s, streamsize __n)
{
- if (__stdio)
- return fread(__s, 1, __n, _M_cfile);
- else
- {
- streamsize __ret;
- do
- __ret = read(this->fd(), __s, __n);
- while (__ret == -1L && errno == EINTR);
- return __ret;
- }
+ streamsize __ret;
+ do
+ __ret = read(this->fd(), __s, __n);
+ while (__ret == -1L && errno == EINTR);
+ return __ret;
}
streamsize
- __basic_file<char>::xsputn(const char* __s, streamsize __n, bool __stdio)
+ __basic_file<char>::xsputn(const char* __s, streamsize __n)
{
- if (__stdio)
- return fwrite(__s, 1, __n, _M_cfile);
- else
- {
- streamsize __ret;
- do
- __ret = write(this->fd(), __s, __n);
- while (__ret == -1L && errno == EINTR);
- return __ret;
- }
+ streamsize __ret;
+ do
+ __ret = write(this->fd(), __s, __n);
+ while (__ret == -1L && errno == EINTR);
+ return __ret;
}
-
- streamoff
- __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way,
- bool __stdio, ios_base::openmode /*__mode*/)
- {
- if (!__stdio)
- return lseek(this->fd(), __off, __way);
- else
+
+ streamsize
+ __basic_file<char>::xsputn_2(const char* __s1, streamsize __n1,
+ const char* __s2, streamsize __n2)
+ {
+ streamsize __ret = 0;
+#ifdef _GLIBCXX_HAVE_WRITEV
+ struct iovec __iov[2];
+ __iov[0].iov_base = const_cast<char*>(__s1);
+ __iov[0].iov_len = __n1;
+ __iov[1].iov_base = const_cast<char*>(__s2);
+ __iov[1].iov_len = __n2;
+
+ do
+ __ret = writev(this->fd(), __iov, 2);
+ while (__ret == -1L && errno == EINTR);
+#else
+ if (__n1)
+ do
+ __ret = write(this->fd(), __s1, __n1);
+ while (__ret == -1L && errno == EINTR);
+
+ if (__ret == __n1)
{
- if (!fseek(_M_cfile, __off, __way))
- return ftell(_M_cfile);
- else
- // Fseek failed.
- return -1L;
+ do
+ __ret = write(this->fd(), __s2, __n2);
+ while (__ret == -1L && errno == EINTR);
+
+ if (__ret != -1L)
+ __ret += __n1;
}
+#endif
+ return __ret;
}
streamoff
- __basic_file<char>::seekpos(streamoff __pos, bool __stdio,
- ios_base::openmode /*__mode*/)
- {
- if (!__stdio)
- return lseek(this->fd(), __pos, ios_base::beg);
- else
- {
- if (!fseek(_M_cfile, __pos, ios_base::beg))
- return ftell(_M_cfile);
- else
- // Fseek failed.
- return -1L;
- }
+ __basic_file<char>::seekoff(streamoff __off, ios_base::seekdir __way)
+ {
+#ifdef _GLIBCXX_USE_LFS
+ return lseek64(this->fd(), __off, __way);
+#else
+ if (__off > std::numeric_limits<off_t>::max()
+ || __off < std::numeric_limits<off_t>::min())
+ return -1L;
+ return lseek(this->fd(), __off, __way);
+#endif
}
-
+
int
__basic_file<char>::sync()
{ return fflush(_M_cfile); }
+
+ streamsize
+ __basic_file<char>::showmanyc()
+ {
+#ifdef FIONREAD
+ // Pipes and sockets.
+#ifdef _GLIBCXX_FIONREAD_TAKES_OFF_T
+ off_t __num = 0;
+#else
+ int __num = 0;
+#endif
+ int __r = ioctl(this->fd(), FIONREAD, &__num);
+ if (!__r && __num >= 0)
+ return __num;
+#endif
+
+#ifdef _GLIBCXX_HAVE_POLL
+ // Cheap test.
+ struct pollfd __pfd[1];
+ __pfd[0].fd = this->fd();
+ __pfd[0].events = POLLIN;
+ if (poll(__pfd, 1, 0) <= 0)
+ return 0;
+#endif
+
+#if defined(_GLIBCXX_HAVE_S_ISREG) || defined(_GLIBCXX_HAVE_S_IFREG)
+ // Regular files.
+ struct stat __buffer;
+ int __ret = fstat(this->fd(), &__buffer);
+ if (!__ret && _GLIBCXX_ISREG(__buffer.st_mode))
+ return __buffer.st_size - lseek(this->fd(), 0, ios_base::cur);
+#endif
+ return 0;
+ }
} // namespace std
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