diff -r 000000000000 -r 6474c204b198 build/stlport/src/details/fstream_unistd.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/build/stlport/src/details/fstream_unistd.cpp Wed Dec 31 06:09:35 2014 +0100 @@ -0,0 +1,347 @@ +/* + * Copyright (c) 1999 + * Silicon Graphics Computer Systems, Inc. + * + * Copyright (c) 1999 + * Boris Fomitchev + * + * This material is provided "as is", with absolutely no warranty expressed + * or implied. Any use is at your own risk. + * + * Permission to use or copy this software for any purpose is hereby granted + * without fee, provided the above notices are retained on all copies. + * Permission to modify the code and to distribute modified code is granted, + * provided the above notices are retained, and a notice that the code was + * modified is included with the above copyright notice. + * + */ + +#if defined (__SUNPPRO_CC) && !defined (_STLP_NO_NEW_C_HEADERS) +# include +// For sunpro, it chokes if time.h is included through stat.h +#endif + +#include + +#ifdef __CYGWIN__ +# define __int64 long long +#endif + +extern "C" { +// open/close/read/write +#include // For stat +#if !defined (_CRAY) && ! defined (__EMX__) +# include // For mmap +#endif + +// on HP-UX 11, this one contradicts with pthread.h on pthread_atfork, unless we unset this +#if defined (__hpux) && defined (__GNUC__) +# undef _INCLUDE_POSIX1C_SOURCE +#endif + +#include +#include +} + +#ifdef __APPLE__ +# include +#endif + +const _STLP_fd INVALID_STLP_FD = -1; + +#ifndef O_ACCMODE +# define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) +#endif + +// Compare with streamoff definition in stl/char_traits.h! +#if defined (_STLP_USE_DEFAULT_FILE_OFFSET) || \ + (!defined(_LARGEFILE_SOURCE) && !defined (_LARGEFILE64_SOURCE)) +# define FSTAT fstat +# define STAT stat +# define LSEEK lseek +# define MMAP mmap +# define OPEN open +#else +# define FSTAT fstat64 +# define STAT stat64 +# define LSEEK lseek64 +# define MMAP mmap64 +# define OPEN open64 +#endif + +#ifndef MAP_FAILED /* MMAP failure return code */ +# define MAP_FAILED -1 +#endif + +_STLP_BEGIN_NAMESPACE + +static ios_base::openmode flag_to_openmode(int mode) +{ + ios_base::openmode ret = ios_base::__default_mode; + + switch ( mode & O_ACCMODE ) { + case O_RDONLY: + ret = ios_base::in; + break; + case O_WRONLY: + ret = ios_base::out; + break; + case O_RDWR: + ret = ios_base::in | ios_base::out; + break; + } + + if ( mode & O_APPEND ) + ret |= ios_base::app; + + return ret; +} + +_STLP_MOVE_TO_PRIV_NAMESPACE + +// Helper functions for _Filebuf_base. + +static bool __is_regular_file(_STLP_fd fd) { + struct STAT buf; + return FSTAT(fd, &buf) == 0 && S_ISREG(buf.st_mode); +} + +// Number of characters in the file. +static streamoff __file_size(_STLP_fd fd) { + streamoff ret = 0; + + struct STAT buf; + if (FSTAT(fd, &buf) == 0 && S_ISREG(buf.st_mode)) + ret = buf.st_size > 0 ? buf.st_size : 0; + + return ret; +} + +_STLP_MOVE_TO_STD_NAMESPACE + +size_t _Filebuf_base::_M_page_size = 4096; + +_Filebuf_base::_Filebuf_base() + : _M_file_id(INVALID_STLP_FD), + _M_openmode(0), + _M_is_open(false), + _M_should_close(false) +{} + +void _Filebuf_base::_S_initialize() +{ +#if defined (__APPLE__) + int mib[2]; + size_t pagesize, len; + mib[0] = CTL_HW; + mib[1] = HW_PAGESIZE; + len = sizeof(pagesize); + sysctl(mib, 2, &pagesize, &len, NULL, 0); + _M_page_size = pagesize; +#elif defined (__DJGPP) && defined (_CRAY) + _M_page_size = BUFSIZ; +#else + _M_page_size = sysconf(_SC_PAGESIZE); +#endif +} + +// Return the size of the file. This is a wrapper for stat. +// Returns zero if the size cannot be determined or is ill-defined. +streamoff _Filebuf_base::_M_file_size() +{ + return _STLP_PRIV __file_size(_M_file_id); +} + +bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode, + long permission) +{ + _STLP_fd file_no; + + if (_M_is_open) + return false; + + int flags = 0; + + // Unix makes no distinction between text and binary files. + switch ( openmode & (~ios_base::ate & ~ios_base::binary) ) { + case ios_base::out: + case ios_base::out | ios_base::trunc: + flags = O_WRONLY | O_CREAT | O_TRUNC; + break; + case ios_base::app: + case ios_base::out | ios_base::app: + flags = O_WRONLY | O_CREAT | O_APPEND; + break; + case ios_base::in: + flags = O_RDONLY; + permission = 0; // Irrelevant unless we're writing. + break; + case ios_base::in | ios_base::out: + flags = O_RDWR; + break; + case ios_base::in | ios_base::out | ios_base::trunc: + flags = O_RDWR | O_CREAT | O_TRUNC; + break; + case ios_base::in | ios_base::app: + case ios_base::in | ios_base::out | ios_base::app: + flags = O_RDWR | O_CREAT | O_APPEND; + break; + default: // The above are the only combinations of + return false; // flags allowed by the C++ standard. + } + + file_no = OPEN(name, flags, permission); + + if (file_no < 0) + return false; + + _M_is_open = true; + + if ((openmode & (ios_base::ate | ios_base::app)) && (LSEEK(file_no, 0, SEEK_END) == -1)) { + _M_is_open = false; + } + + _M_file_id = file_no; + _M_should_close = _M_is_open; + _M_openmode = openmode; + + if (_M_is_open) + _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id); + + return (_M_is_open != 0); +} + + +bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode) +{ + // This doesn't really grant everyone in the world read/write + // access. On Unix, file-creation system calls always clear + // bits that are set in the umask from the permissions flag. + return this->_M_open(name, openmode, S_IRUSR | S_IWUSR | S_IRGRP | + S_IWGRP | S_IROTH | S_IWOTH); +} + +// Associated the filebuf with a file descriptor pointing to an already- +// open file. Mode is set to be consistent with the way that the file +// was opened. +bool _Filebuf_base::_M_open(int file_no, ios_base::openmode) +{ + if (_M_is_open || file_no < 0) + return false; + + int mode = fcntl(file_no, F_GETFL); + + if (mode == -1) + return false; + + _M_openmode = flag_to_openmode(mode); + _M_file_id = file_no; + + _M_is_open = true; + _M_should_close = false; + _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id); + return true; +} + +bool _Filebuf_base::_M_close() +{ + if (!_M_is_open) + return false; + + bool ok = _M_should_close ? (close(_M_file_id) == 0) : true; + + _M_is_open = _M_should_close = false; + _M_openmode = 0; + return ok; +} + +// Read up to n characters into a buffer. Return value is number of +// characters read. +ptrdiff_t _Filebuf_base::_M_read(char* buf, ptrdiff_t n) +{ + return read(_M_file_id, buf, n); +} + +// Write n characters from a buffer. Return value: true if we managed +// to write the entire buffer, false if we didn't. +bool _Filebuf_base::_M_write(char* buf, ptrdiff_t n) +{ + for (;;) { + ptrdiff_t written = write(_M_file_id, buf, n); + + if (n == written) { + return true; + } + + if (written > 0 && written < n) { + n -= written; + buf += written; + } else { + return false; + } + } +} + +// Wrapper for lseek or the like. +streamoff _Filebuf_base::_M_seek(streamoff offset, ios_base::seekdir dir) +{ + int whence; + + switch ( dir ) { + case ios_base::beg: + if (offset < 0 /* || offset > _M_file_size() */ ) + return streamoff(-1); + whence = SEEK_SET; + break; + case ios_base::cur: + whence = SEEK_CUR; + break; + case ios_base::end: + if (/* offset > 0 || */ -offset > _M_file_size() ) + return streamoff(-1); + whence = SEEK_END; + break; + default: + return streamoff(-1); + } + + return LSEEK(_M_file_id, offset, whence); +} + +// Attempts to memory-map len bytes of the current file, starting +// at position offset. Precondition: offset is a multiple of the +// page size. Postcondition: return value is a null pointer if the +// memory mapping failed. Otherwise the return value is a pointer to +// the memory-mapped file and the file position is set to offset. +void* _Filebuf_base::_M_mmap(streamoff offset, streamoff len) +{ + void* base; +#if !defined (__DJGPP) && !defined (_CRAY) + base = MMAP(0, len, PROT_READ, MAP_PRIVATE, _M_file_id, offset); + if (base != (void*)MAP_FAILED) { + if (LSEEK(_M_file_id, offset + len, SEEK_SET) < 0) { + this->_M_unmap(base, len); + base = 0; + } + } else + base =0; +#else + _STLP_MARK_PARAMETER_AS_UNUSED(&offset) + _STLP_MARK_PARAMETER_AS_UNUSED(&len) + base = 0; +#endif + return base; +} + +void _Filebuf_base::_M_unmap(void* base, streamoff len) +{ + // precondition : there is a valid mapping at the moment +#if !defined (__DJGPP) && !defined (_CRAY) + munmap((char*)base, len); +#else + _STLP_MARK_PARAMETER_AS_UNUSED(&len) + _STLP_MARK_PARAMETER_AS_UNUSED(base) +#endif +} + +_STLP_END_NAMESPACE