Loren J. Rittle ddf1e65262 porting.texi: Add documentation about libstdc++-v3-specific macros that are currently... ... libstdc++/2071 * porting.texi: Add documentation about libstdc++-v3-specific macros that are currently included in os_defines.h files. * config/basic_file_stdio.h (sys_getc): New method. (sys_ungetc): New method. * include/bits/basic_file.h: (sys_getc): New method signature. (sys_ungetc): New method signature. * include/bits/fstream.tcc (underflow): Add conditional code paths which avoid using short seeks on streams (especially useful when the stream might be interactive or a pipe). At the moment, this alternate path only avoids seeking when the ``buffer size'' of underflow() is 1 since the C standard only guarantees buffer space for one ungetc (this technique could be extended since *-*-solaris* supports buffering for 4 calls to ungetc and *-*-*bsd* supports buffering limited only by memory resources). Also, _GLIBCPP_AVOID_FSEEK must be defined in a port's os_defines.h file for this alternate path to even be considered. As a bonus, the idiom of using getc/ungetc requires no system calls whereas fseek maps to one or two system call(s) on many platforms. * config/os/bsd/freebsd/bits/os_defines.h (_GLIBCPP_AVOID_FSEEK): Define it. * config/os/solaris/solaris2.5/bits/os_defines.h (_GLIBCPP_AVOID_FSEEK): Likewise. * config/os/solaris/solaris2.6/bits/os_defines.h (_GLIBCPP_AVOID_FSEEK): Likewise. * config/os/solaris/solaris2.7/bits/os_defines.h (_GLIBCPP_AVOID_FSEEK): Likewise. From-SVN: r43278		2001-06-12 23:09:09 +00:00
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cpu
os	porting.texi: Add documentation about libstdc++-v3-specific macros that are currently...	2001-06-12 23:09:09 +00:00
basic_file_libio.cc	basic_file.h: Include basic_file_model.h.	2001-02-28 03:20:36 +00:00
basic_file_libio.h	basic_file.h (get_fileno): Remove.	2001-03-27 03:48:17 +00:00
basic_file_stdio.cc	basic_file.h: Include basic_file_model.h.	2001-02-28 03:20:36 +00:00
basic_file_stdio.h	porting.texi: Add documentation about libstdc++-v3-specific macros that are currently...	2001-06-12 23:09:09 +00:00
c_io_libio_codecvt.c
c_io_libio.h	std_iosfwd.h: Remove string forward decls here.	2001-03-07 22:22:41 +00:00
c_io_stdio.h	basic_string.h (string::compare): Adjust signatures as per DR 5.	2001-06-12 02:30:37 +00:00
c_locale_generic.cc
c_locale_generic.h
c_locale_gnu.cc
c_locale_gnu.h