1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/build/stlport/src/details/fstream_stdio.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,387 @@
1.4 +/*
1.5 + * Copyright (c) 1999
1.6 + * Silicon Graphics Computer Systems, Inc.
1.7 + *
1.8 + * Copyright (c) 1999
1.9 + * Boris Fomitchev
1.10 + *
1.11 + * This material is provided "as is", with absolutely no warranty expressed
1.12 + * or implied. Any use is at your own risk.
1.13 + *
1.14 + * Permission to use or copy this software for any purpose is hereby granted
1.15 + * without fee, provided the above notices are retained on all copies.
1.16 + * Permission to modify the code and to distribute modified code is granted,
1.17 + * provided the above notices are retained, and a notice that the code was
1.18 + * modified is included with the above copyright notice.
1.19 + *
1.20 + */
1.21 +
1.22 +#if defined (__SUNPPRO_CC) && !defined (_STLP_NO_NEW_C_HEADERS)
1.23 +# include <time.h>
1.24 +// For sunpro, it chokes if time.h is included through stat.h
1.25 +#endif
1.26 +
1.27 +#include <fstream>
1.28 +
1.29 +#ifdef __CYGWIN__
1.30 +# define __int64 long long
1.31 +#endif
1.32 +
1.33 +#include <cstdio>
1.34 +#if !defined(__ISCPP__)
1.35 +extern "C" {
1.36 +# include <sys/stat.h>
1.37 +}
1.38 +#endif
1.39 +
1.40 +#if defined( __MSL__ )
1.41 +# include <unix.h>
1.42 +#endif
1.43 +
1.44 +#if defined(__ISCPP__)
1.45 +# include <c_locale_is/filestat.h>
1.46 +#endif
1.47 +
1.48 +#if defined(__BEOS__) && defined(__INTEL__)
1.49 +# include <fcntl.h>
1.50 +# include <sys/stat.h> // For _fstat
1.51 +#endif
1.52 +
1.53 +#if defined (_STLP_MSVC) || defined (__MINGW32__)
1.54 +# include <fcntl.h>
1.55 +# define S_IREAD _S_IREAD
1.56 +# define S_IWRITE _S_IWRITE
1.57 +# define S_IFREG _S_IFREG
1.58 + // map permission masks
1.59 +# ifndef S_IRUSR
1.60 +# define S_IRUSR _S_IREAD
1.61 +# define S_IWUSR _S_IWRITE
1.62 +# endif
1.63 +# ifndef S_IRGRP
1.64 +# define S_IRGRP _S_IREAD
1.65 +# define S_IWGRP _S_IWRITE
1.66 +# endif
1.67 +# ifndef S_IROTH
1.68 +# define S_IROTH _S_IREAD
1.69 +# define S_IWOTH _S_IWRITE
1.70 +# endif
1.71 +
1.72 +# ifndef O_RDONLY
1.73 +# define O_RDONLY _O_RDONLY
1.74 +# define O_WRONLY _O_WRONLY
1.75 +# define O_RDWR _O_RDWR
1.76 +# define O_APPEND _O_APPEND
1.77 +# define O_CREAT _O_CREAT
1.78 +# define O_TRUNC _O_TRUNC
1.79 +# define O_TEXT _O_TEXT
1.80 +# define O_BINARY _O_BINARY
1.81 +# endif
1.82 +
1.83 +# ifndef O_ACCMODE
1.84 +# define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
1.85 +# endif
1.86 +#endif
1.87 +
1.88 +const _STLP_fd INVALID_STLP_FD = -1;
1.89 +
1.90 +
1.91 +# ifdef __MSL__
1.92 +# define _O_TEXT 0x0
1.93 +# if !defined( O_TEXT )
1.94 +# define O_TEXT _O_TEXT
1.95 +# endif
1.96 +# define _S_IFREG S_IFREG
1.97 +# define S_IREAD S_IRUSR
1.98 +# define S_IWRITE S_IWUSR
1.99 +# define S_IEXEC S_IXUSR
1.100 +# define _S_IWRITE S_IWRITE
1.101 +# define _S_IREAD S_IREAD
1.102 +# define _open open
1.103 +# define _close close
1.104 +# define _read read
1.105 +# define _write write
1.106 +# endif
1.107 +
1.108 +_STLP_BEGIN_NAMESPACE
1.109 +
1.110 +// Compare with streamoff definition in stl/char_traits.h!
1.111 +
1.112 +#if defined (_STLP_USE_DEFAULT_FILE_OFFSET) || \
1.113 + (!defined(_LARGEFILE_SOURCE) && !defined(_LARGEFILE64_SOURCE))
1.114 +# define FOPEN fopen
1.115 +# define FSEEK fseek
1.116 +# define FSTAT fstat
1.117 +# define STAT stat
1.118 +# define FTELL ftell
1.119 +#else
1.120 +# define FOPEN fopen64
1.121 +# define FSEEK fseeko64
1.122 +# define FSTAT fstat64
1.123 +# define STAT stat64
1.124 +# define FTELL ftello64
1.125 +#endif
1.126 +
1.127 +_STLP_MOVE_TO_PRIV_NAMESPACE
1.128 +
1.129 +// Helper functions for _Filebuf_base.
1.130 +
1.131 +static bool __is_regular_file(_STLP_fd fd) {
1.132 + struct STAT buf;
1.133 + return FSTAT(fd, &buf) == 0 && (buf.st_mode & S_IFREG) != 0 ;
1.134 +}
1.135 +
1.136 +// Number of characters in the file.
1.137 +static streamoff __file_size(_STLP_fd fd) {
1.138 + streamoff ret = 0;
1.139 +
1.140 + struct STAT buf;
1.141 + if (FSTAT(fd, &buf) == 0 && (buf.st_mode & S_IFREG) != 0)
1.142 + ret = buf.st_size > 0 ? buf.st_size : 0;
1.143 +
1.144 + return ret;
1.145 +}
1.146 +
1.147 +_STLP_MOVE_TO_STD_NAMESPACE
1.148 +
1.149 +// All version of Unix have mmap and lseek system calls. Some also have
1.150 +// longer versions of those system calls to accommodate 64-bit offsets.
1.151 +// If we're on a Unix system, define some macros to encapsulate those
1.152 +// differences.
1.153 +
1.154 +size_t _Filebuf_base::_M_page_size = 4096;
1.155 +
1.156 +_Filebuf_base::_Filebuf_base()
1.157 + : _M_file_id(INVALID_STLP_FD),
1.158 + _M_openmode(0),
1.159 + _M_is_open(false),
1.160 + _M_should_close(false)
1.161 +{}
1.162 +
1.163 +void _Filebuf_base::_S_initialize()
1.164 +{
1.165 +
1.166 +}
1.167 +
1.168 +// Return the size of the file. This is a wrapper for stat.
1.169 +// Returns zero if the size cannot be determined or is ill-defined.
1.170 +streamoff _Filebuf_base::_M_file_size()
1.171 +{
1.172 + return _STLP_PRIV __file_size(_M_file_id);
1.173 +}
1.174 +
1.175 +bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode,
1.176 + long permission)
1.177 +{
1.178 + _STLP_fd file_no;
1.179 +
1.180 + if (_M_is_open)
1.181 + return false;
1.182 +
1.183 + // use FILE-based i/o
1.184 + const char* flags;
1.185 +
1.186 + switch (openmode & (~ios_base::ate)) {
1.187 + case ios_base::out:
1.188 + case ios_base::out | ios_base::trunc:
1.189 + flags = "w";
1.190 + break;
1.191 +
1.192 + case ios_base::out | ios_base::binary:
1.193 + case ios_base::out | ios_base::trunc | ios_base::binary:
1.194 + flags = "wb";
1.195 + break;
1.196 +
1.197 + case ios_base::out | ios_base::app:
1.198 + flags = "a";
1.199 + break;
1.200 +
1.201 + case ios_base::out | ios_base::app | ios_base::binary:
1.202 + flags = "ab";
1.203 + break;
1.204 +
1.205 + case ios_base::in:
1.206 + flags = "r";
1.207 + break;
1.208 +
1.209 + case ios_base::in | ios_base::binary:
1.210 + flags = "rb";
1.211 + break;
1.212 +
1.213 + case ios_base::in | ios_base::out:
1.214 + flags = "r+";
1.215 + break;
1.216 +
1.217 + case ios_base::in | ios_base::out | ios_base::binary:
1.218 + flags = "r+b";
1.219 + break;
1.220 +
1.221 + case ios_base::in | ios_base::out | ios_base::trunc:
1.222 + flags = "w+";
1.223 + break;
1.224 +
1.225 + case ios_base::in | ios_base::out | ios_base::trunc | ios_base::binary:
1.226 + flags = "w+b";
1.227 + break;
1.228 +
1.229 + default: // The above are the only combinations of
1.230 + return false; // flags allowed by the C++ standard.
1.231 + }
1.232 +
1.233 + // fbp : TODO : set permissions !
1.234 + (void)permission; // currently unused //*TY 02/26/2000 - added to suppress warning message
1.235 + _M_file = FOPEN(name, flags);
1.236 +
1.237 + if (_M_file) {
1.238 + file_no = fileno(_M_file);
1.239 + } else {
1.240 + return false;
1.241 + }
1.242 +
1.243 + // unset buffering immediately
1.244 + setbuf(_M_file, 0);
1.245 +
1.246 + _M_is_open = true;
1.247 +
1.248 + if (openmode & ios_base::ate) {
1.249 + if (FSEEK(_M_file, 0, SEEK_END) != 0)
1.250 + _M_is_open = false;
1.251 + }
1.252 +
1.253 + _M_file_id = file_no;
1.254 + _M_should_close = _M_is_open;
1.255 + _M_openmode = openmode;
1.256 +
1.257 + if (_M_is_open)
1.258 + _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id);
1.259 +
1.260 + return (_M_is_open != 0);
1.261 +}
1.262 +
1.263 +
1.264 +bool _Filebuf_base::_M_open(const char* name, ios_base::openmode openmode)
1.265 +{
1.266 + // This doesn't really grant everyone in the world read/write
1.267 + // access. On Unix, file-creation system calls always clear
1.268 + // bits that are set in the umask from the permissions flag.
1.269 + return this->_M_open(name, openmode, S_IRUSR | S_IWUSR | S_IRGRP |
1.270 + S_IWGRP | S_IROTH | S_IWOTH);
1.271 +}
1.272 +
1.273 +// Associated the filebuf with a file descriptor pointing to an already-
1.274 +// open file. Mode is set to be consistent with the way that the file
1.275 +// was opened.
1.276 +bool _Filebuf_base::_M_open( int file_no, ios_base::openmode )
1.277 +{
1.278 + if (_M_is_open || file_no < 0)
1.279 + return false;
1.280 +
1.281 + struct STAT buf;
1.282 + if (FSTAT(file_no, &buf) != 0)
1.283 + return false;
1.284 + int mode = buf.st_mode;
1.285 +
1.286 + switch ( mode & (S_IWRITE | S_IREAD) ) {
1.287 + case S_IREAD:
1.288 + _M_openmode = ios_base::in;
1.289 + break;
1.290 + case S_IWRITE:
1.291 + _M_openmode = ios_base::out;
1.292 + break;
1.293 + case (S_IWRITE | S_IREAD):
1.294 + _M_openmode = ios_base::in | ios_base::out;
1.295 + break;
1.296 + default:
1.297 + return false;
1.298 + }
1.299 + _M_file_id = file_no;
1.300 + _M_is_open = true;
1.301 + _M_should_close = false;
1.302 + _M_regular_file = _STLP_PRIV __is_regular_file(_M_file_id);
1.303 + return true;
1.304 +}
1.305 +
1.306 +bool _Filebuf_base::_M_close()
1.307 +{
1.308 + if (!_M_is_open)
1.309 + return false;
1.310 +
1.311 + bool ok = _M_should_close ? (fclose(_M_file) == 0) : true;
1.312 +
1.313 + _M_is_open = _M_should_close = false;
1.314 + _M_openmode = 0;
1.315 + return ok;
1.316 +}
1.317 +
1.318 +// Read up to n characters into a buffer. Return value is number of
1.319 +// characters read.
1.320 +ptrdiff_t _Filebuf_base::_M_read(char* buf, ptrdiff_t n) {
1.321 + return fread(buf, 1, n, _M_file);
1.322 +}
1.323 +
1.324 +// Write n characters from a buffer. Return value: true if we managed
1.325 +// to write the entire buffer, false if we didn't.
1.326 +bool _Filebuf_base::_M_write(char* buf, ptrdiff_t n)
1.327 +{
1.328 + for (;;) {
1.329 + ptrdiff_t written = fwrite(buf, 1, n, _M_file);
1.330 +
1.331 + if (n == written) {
1.332 + return true;
1.333 + }
1.334 +
1.335 + if (written > 0 && written < n) {
1.336 + n -= written;
1.337 + buf += written;
1.338 + } else {
1.339 + return false;
1.340 + }
1.341 + }
1.342 +}
1.343 +
1.344 +// Wrapper for lseek or the like.
1.345 +streamoff _Filebuf_base::_M_seek(streamoff offset, ios_base::seekdir dir)
1.346 +{
1.347 + int whence;
1.348 +
1.349 + switch ( dir ) {
1.350 + case ios_base::beg:
1.351 + if (offset < 0 /* || offset > _M_file_size() */ )
1.352 + return streamoff(-1);
1.353 + whence = SEEK_SET;
1.354 + break;
1.355 + case ios_base::cur:
1.356 + whence = SEEK_CUR;
1.357 + break;
1.358 + case ios_base::end:
1.359 + if (/* offset > 0 || */ -offset > _M_file_size() )
1.360 + return streamoff(-1);
1.361 + whence = SEEK_END;
1.362 + break;
1.363 + default:
1.364 + return streamoff(-1);
1.365 + }
1.366 +
1.367 + if ( FSEEK(_M_file, offset, whence) == 0 ) {
1.368 + return FTELL(_M_file);
1.369 + }
1.370 +
1.371 + return streamoff(-1);
1.372 +}
1.373 +
1.374 +
1.375 +// Attempts to memory-map len bytes of the current file, starting
1.376 +// at position offset. Precondition: offset is a multiple of the
1.377 +// page size. Postcondition: return value is a null pointer if the
1.378 +// memory mapping failed. Otherwise the return value is a pointer to
1.379 +// the memory-mapped file and the file position is set to offset.
1.380 +void *_Filebuf_base::_M_mmap(streamoff, streamoff )
1.381 +{
1.382 + return 0;
1.383 +}
1.384 +
1.385 +void _Filebuf_base::_M_unmap(void*, streamoff)
1.386 +{
1.387 + // precondition : there is a valid mapping at the moment
1.388 +}
1.389 +
1.390 +_STLP_END_NAMESPACE
