The Tor Browser: build/stlport/src/stdio_streambuf.cpp@b8a032363ba2 (annotated)

build/stlport/src/stdio_streambuf.cpp@b8a032363ba2 (annotated)

build/stlport/src/stdio_streambuf.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /*
  * 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.
  *
  */
 #include "stlport_prefix.h"
 #include "stdio_streambuf.h"
 #ifdef _STLP_UNIX
 #  include <sys/types.h>
 #  include <sys/stat.h>
 #endif
 #include <fstream>
 #include <limits>
 _STLP_BEGIN_NAMESPACE
 _STLP_MOVE_TO_PRIV_NAMESPACE
 // Compare with streamoff definition in stl/char_traits.h!
 #if defined (_STLP_USE_DEFAULT_FILE_OFFSET) || \
     (!defined(_LARGEFILE_SOURCE) && !defined(_LARGEFILE64_SOURCE))
 #  if !defined (_STLP_MSVC) || (_STLP_MSVC < 1400) || defined(_STLP_WCE)
 #    define FSEEK fseek
 #  else
 #    define FSEEK _fseeki64
 #  endif
 #  define FSETPOS  fsetpos
 #  define FGETPOS  fgetpos
 #  define FPOS_T   fpos_t
 #else
 #  define FSEEK fseeko64
 #  define FSETPOS  fsetpos64
 #  define FGETPOS  fgetpos64
 #  define FPOS_T   fpos64_t
 #endif
 //----------------------------------------------------------------------
 // Class stdio_streambuf_base
 stdio_streambuf_base::stdio_streambuf_base(FILE* file)
     : /* _STLP_STD::FILE_basic_streambuf(file, 0), */
     _M_file(file)
 {}
 stdio_streambuf_base::~stdio_streambuf_base() {
   _STLP_VENDOR_CSTD::fflush(_M_file);
 }
 _STLP_STD::streambuf* stdio_streambuf_base::setbuf(char* s, streamsize n) {
 #ifdef _STLP_WCE
   // no buffering in windows ce .NET
 #else
   size_t __n_size_t = (sizeof(streamsize) > sizeof(size_t)) ? __STATIC_CAST(size_t, (min)(__STATIC_CAST(streamsize, (numeric_limits<size_t>::max)()), n))
                                                             : __STATIC_CAST(size_t, n);
   _STLP_VENDOR_CSTD::setvbuf(_M_file, s, (s == 0 && n == 0) ? _IONBF : _IOFBF, __n_size_t);
 #endif
   return this;
 }
 stdio_streambuf_base::pos_type
 stdio_streambuf_base::seekoff(off_type off, ios_base::seekdir dir,
                               ios_base::openmode /* mode */) {
   int whence;
   switch (dir) {
   case ios_base::beg:
     whence = SEEK_SET;
     break;
   case ios_base::cur:
     whence = SEEK_CUR;
     break;
   case ios_base::end:
     whence = SEEK_END;
     break;
   default:
     return pos_type(-1);
   }
   if (off <= numeric_limits<off_type>::max() && FSEEK(_M_file, off, whence) == 0) {
     FPOS_T pos;
     FGETPOS(_M_file, &pos);
     // added 21 june 00 mdb,rjf,wjs: glibc 2.2 changed fpos_t to be a struct instead
     // of a primitive type
 #if (defined (__GLIBC__) && ((__GLIBC__ > 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 2))))
     return pos_type((streamoff)pos.__pos);
 #elif defined (__ISCPP__) || defined (__MVS__) || defined (__OS400__)
     return pos_type(pos.__fpos_elem[ 0 ]);
 #elif defined (__EMX__)
     return pos_type((streamoff)pos._pos);
 #else
     return pos_type(pos);
 #endif
   }
   else
     return pos_type(-1);
 }
 stdio_streambuf_base::pos_type
 stdio_streambuf_base::seekpos(pos_type pos, ios_base::openmode /* mode */) {
   // added 21 june 00 mdb,rjf,wjs: glibc 2.2 changed fpos_t to be a struct instead
   // of a primitive type
 #if (defined(__GLIBC__) && ( (__GLIBC__ > 2) || ( (__GLIBC__ == 2) && (__GLIBC_MINOR__ >= 2) ) ) )
   FPOS_T p;
   p.__pos = pos;
 #  ifdef _STLP_USE_UCLIBC
 #    ifdef __STDIO_MBSTATE
   memset( &(p.__mbstate), 0, sizeof(p.__mbstate) );
 #    endif
 #    ifdef __STDIO_WIDE
   p.mblen_pending = 0;
 #    endif
 #  else
   memset( &(p.__state), 0, sizeof(p.__state) );
 #  endif
 #elif defined (__MVS__) || defined (__OS400__)
   FPOS_T p;
   p.__fpos_elem[0] = pos;
 #elif defined (__EMX__)
   FPOS_T p;
   p._pos = pos;
   memset( &(p._mbstate), 0, sizeof(p._mbstate) );
 #else
   FPOS_T p(pos);
 #endif
   return FSETPOS(_M_file, &p) == 0 ? pos : pos_type(-1);
 }
 int stdio_streambuf_base::sync() {
   return _STLP_VENDOR_CSTD::fflush(_M_file) == 0 ? 0 : -1;
 }
 //----------------------------------------------------------------------
 // Class stdio_istreambuf
 stdio_istreambuf::~stdio_istreambuf() {}
 streamsize stdio_istreambuf::showmanyc()
 { return 0; }
 stdio_istreambuf::int_type stdio_istreambuf::underflow()
 {
 #ifdef _STLP_WCE
   int c = fgetc(_M_file);
 #else
   int c = getc(_M_file);
 #endif
   if (c != EOF) {
     _STLP_VENDOR_CSTD::ungetc(c, _M_file);
     return c;
   }
   else
     return traits_type::eof();
 }
 stdio_istreambuf::int_type stdio_istreambuf::uflow() {
 #ifdef _STLP_WCE
   int c = fgetc(_M_file);
 #else
   int c = getc(_M_file);
 #endif
   return c != EOF ? c : traits_type::eof();
 }
 stdio_istreambuf::int_type stdio_istreambuf::pbackfail(int_type c) {
   if (c != traits_type::eof()) {
     int result = _STLP_VENDOR_CSTD::ungetc(c, _M_file);
     return result != EOF ? result : traits_type::eof();
   }
   else{
     if (this->eback() < this->gptr()) {
       this->gbump(-1);
       return traits_type::not_eof(c);
     }
     else
       return traits_type::eof();
   }
 }
 //----------------------------------------------------------------------
 // Class stdio_ostreambuf
 stdio_ostreambuf::~stdio_ostreambuf() {}
 streamsize stdio_ostreambuf::showmanyc()
 { return -1; }
 stdio_ostreambuf::int_type stdio_ostreambuf::overflow(int_type c) {
   // Write the existing buffer, without writing any additional character.
   if (c == traits_type::eof()) {
     // Do we have a buffer to write?
     ptrdiff_t unwritten = this->pptr() - this->pbase();
     if (unwritten != 0) {
       _STLP_VENDOR_CSTD::fflush(_M_file);
       // Test if the write succeeded.
       if (this->pptr() - this->pbase() < unwritten)
         return traits_type::not_eof(c);
       else
         return traits_type::eof();
     }
     // We always succeed if we don't have to do anything.
     else
       return traits_type::not_eof(c);
   }
   // Write the character c, and whatever else might be in the buffer.
   else {
 #ifdef _STLP_WCE
     int result = fputc(c, _M_file);
 #else
     int result = putc(c, _M_file);
 #endif
     return result != EOF ? result : traits_type::eof();
   }
 }
 _STLP_MOVE_TO_STD_NAMESPACE
 _STLP_END_NAMESPACE
 // Local Variables:
 // mode:C++
 // End:

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build/stlport/src/stdio_streambuf.cpp@b8a032363ba2 (annotated)

build/stlport/src/stdio_streambuf.cpp