[PING][PATCH v4][BZ #17787] Fix exponents in manual.

[OndÅej BÃlka <neleai at seznam dot cz>]

ping, is that ok now.
On Sun, Jul 12, 2015 at 11:32:56AM +0200, OndÅej BÃlka wrote:
> On Thu, Jun 18, 2015 at 04:01:09PM +0000, Joseph Myers wrote:
> > On Thu, 18 Jun 2015, Carlos O'Donell wrote:
> > 
> > > > The macro definitions should go in macros.texi, rather than being 
> > > > duplicated in each file using it.
> > > 
> > > It would also seem sensible to keep such macros near their uses,
> > > and move them to macros.texi only if globally useful or repeated
> > > more than some nominal number of times.
> > > 
> > > What if the macro was only used in one place? Would we still put
> > > it into macros.texi?
> > 
> > If it were only used in one source file, it might be reasonable to define 
> > it there, but this macro is used in three source files.
> > 
> Ok, here is new version.
> 	
> 	* manual/macros.texi: Add twoexp macro.
> 	* manual/filesys.texi: Fix exponents.
> 	* manual/llio.texi: Likewise.
> 	* manual/stdio.texi: Likewise.
> 
> diff --git a/manual/filesys.texi b/manual/filesys.texi
> index 0f2e3dc..ed4f5fd 100644
> --- a/manual/filesys.texi
> +++ b/manual/filesys.texi
> @@ -1834,7 +1834,7 @@ writing the file.  (This is unrelated to @code{st_blocks}.)
>  @end deftp
>  
>  The extensions for the Large File Support (LFS) require, even on 32-bit
> -machines, types which can handle file sizes up to @math{2^63}.
> +machines, types which can handle file sizes up to @twoexp{63}.
>  Therefore a new definition of @code{struct stat} is necessary.
>  
>  @comment sys/stat.h
> @@ -2024,7 +2024,7 @@ replaces the normal implementation.
>  @deftypefun int stat64 (const char *@var{filename}, struct stat64 *@var{buf})
>  @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
>  This function is similar to @code{stat} but it is also able to work on
> -files larger than @math{2^31} bytes on 32-bit systems.  To be able to do
> +files larger than @twoexp{31} bytes on 32-bit systems.  To be able to do
>  this the result is stored in a variable of type @code{struct stat64} to
>  which @var{buf} must point.
>  
> @@ -2097,7 +2097,7 @@ replaces the normal implementation.
>  @c Direct system call through lxstat64, sometimes with an xstat conv
>  @c call afterwards.
>  This function is similar to @code{lstat} but it is also able to work on
> -files larger than @math{2^31} bytes on 32-bit systems.  To be able to do
> +files larger than @twoexp{31} bytes on 32-bit systems.  To be able to do
>  this the result is stored in a variable of type @code{struct stat64} to
>  which @var{buf} must point.
>  
> @@ -3073,7 +3073,7 @@ systems do not support this feature and will leave the file unchanged.
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
>  @code{truncate} function is in fact @code{truncate64} and the type
>  @code{off_t} has 64 bits which makes it possible to handle files up to
> -@math{2^63} bytes in length.
> +@twoexp{63} bytes in length.
>  
>  The return value is @math{0} for success, or @math{-1} for an error.  In
>  addition to the usual file name errors, the following errors may occur:
> @@ -3110,7 +3110,7 @@ The operation was interrupted by a signal.
>  This function is similar to the @code{truncate} function.  The
>  difference is that the @var{length} argument is 64 bits wide even on 32
>  bits machines, which allows the handling of files with sizes up to
> -@math{2^63} bytes.
> +@twoexp{63} bytes.
>  
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} on a
>  32 bits machine this function is actually available under the name
> @@ -3144,7 +3144,7 @@ The example below shows how this works.
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
>  @code{ftruncate} function is in fact @code{ftruncate64} and the type
>  @code{off_t} has 64 bits which makes it possible to handle files up to
> -@math{2^63} bytes in length.
> +@twoexp{63} bytes in length.
>  
>  The return value is @math{0} for success, or @math{-1} for an error.  The
>  following errors may occur:
> @@ -3190,7 +3190,7 @@ The operation was interrupted by a signal.
>  This function is similar to the @code{ftruncate} function.  The
>  difference is that the @var{length} argument is 64 bits wide even on 32
>  bits machines which allows the handling of files with sizes up to
> -@math{2^63} bytes.
> +@twoexp{63} bytes.
>  
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} on a
>  32 bits machine this function is actually available under the name
> @@ -3430,7 +3430,7 @@ interface transparently replaces the old interface.
>  @safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@acsmem{} @acsfd{} @aculock{}}}
>  This function is similar to @code{tmpfile}, but the stream it returns a
>  pointer to was opened using @code{tmpfile64}.  Therefore this stream can
> -be used for files larger than @math{2^31} bytes on 32-bit machines.
> +be used for files larger than @twoexp{31} bytes on 32-bit machines.
>  
>  Please note that the return type is still @code{FILE *}.  There is no
>  special @code{FILE} type for the LFS interface.
> diff --git a/manual/llio.texi b/manual/llio.texi
> index 4f3fada..019dea2 100644
> --- a/manual/llio.texi
> +++ b/manual/llio.texi
> @@ -150,8 +150,8 @@ or @code{O_CREAT} is set and the file does not already exist.
>  If on a 32 bit machine the sources are translated with
>  @code{_FILE_OFFSET_BITS == 64} the function @code{open} returns a file
>  descriptor opened in the large file mode which enables the file handling
> -functions to use files up to @math{2^63} bytes in size and offset from
> -@math{-2^63} to @math{2^63}.  This happens transparently for the user
> +functions to use files up to @twoexp{63} bytes in size and offset from
> +@minus{}@twoexp{63} to @twoexp{63}.  This happens transparently for the user
>  since all of the lowlevel file handling functions are equally replaced.
>  
>  This function is a cancellation point in multi-threaded programs.  This
> @@ -201,8 +201,8 @@ open (@var{filename}, O_WRONLY | O_CREAT | O_TRUNC, @var{mode})
>  If on a 32 bit machine the sources are translated with
>  @code{_FILE_OFFSET_BITS == 64} the function @code{creat} returns a file
>  descriptor opened in the large file mode which enables the file handling
> -functions to use files up to @math{2^63} in size and offset from
> -@math{-2^63} to @math{2^63}.  This happens transparently for the user
> +functions to use files up to @twoexp{63} in size and offset from
> +@minus{}@twoexp{63} to @twoexp{63}.  This happens transparently for the user
>  since all of the lowlevel file handling functions are equally replaced.
>  @end deftypefn
>  
> @@ -422,7 +422,7 @@ not affected by the operation.  The value is the same as before the call.
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
>  @code{pread} function is in fact @code{pread64} and the type
>  @code{off_t} has 64 bits, which makes it possible to handle files up to
> -@math{2^63} bytes in length.
> +@twoexp{63} bytes in length.
>  
>  The return value of @code{pread} describes the number of bytes read.
>  In the error case it returns @math{-1} like @code{read} does and the
> @@ -451,7 +451,7 @@ version 2.
>  This function is similar to the @code{pread} function.  The difference
>  is that the @var{offset} parameter is of type @code{off64_t} instead of
>  @code{off_t} which makes it possible on 32 bit machines to address
> -files larger than @math{2^31} bytes and up to @math{2^63} bytes.  The
> +files larger than @twoexp{31} bytes and up to @twoexp{63} bytes.  The
>  file descriptor @code{filedes} must be opened using @code{open64} since
>  otherwise the large offsets possible with @code{off64_t} will lead to
>  errors with a descriptor in small file mode.
> @@ -623,7 +623,7 @@ not affected by the operation.  The value is the same as before the call.
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
>  @code{pwrite} function is in fact @code{pwrite64} and the type
>  @code{off_t} has 64 bits, which makes it possible to handle files up to
> -@math{2^63} bytes in length.
> +@twoexp{63} bytes in length.
>  
>  The return value of @code{pwrite} describes the number of written bytes.
>  In the error case it returns @math{-1} like @code{write} does and the
> @@ -652,7 +652,7 @@ version 2.
>  This function is similar to the @code{pwrite} function.  The difference
>  is that the @var{offset} parameter is of type @code{off64_t} instead of
>  @code{off_t} which makes it possible on 32 bit machines to address
> -files larger than @math{2^31} bytes and up to @math{2^63} bytes.  The
> +files larger than @twoexp{31} bytes and up to @twoexp{63} bytes.  The
>  file descriptor @code{filedes} must be opened using @code{open64} since
>  otherwise the large offsets possible with @code{off64_t} will lead to
>  errors with a descriptor in small file mode.
> @@ -752,7 +752,7 @@ only for pipes and FIFOs, but on @gnusystems{}, you always get
>  When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
>  @code{lseek} function is in fact @code{lseek64} and the type
>  @code{off_t} has 64 bits which makes it possible to handle files up to
> -@math{2^63} bytes in length.
> +@twoexp{63} bytes in length.
>  
>  This function is a cancellation point in multi-threaded programs.  This
>  is a problem if the thread allocates some resources (like memory, file
> @@ -775,7 +775,7 @@ descriptors.
>  This function is similar to the @code{lseek} function.  The difference
>  is that the @var{offset} parameter is of type @code{off64_t} instead of
>  @code{off_t} which makes it possible on 32 bit machines to address
> -files larger than @math{2^31} bytes and up to @math{2^63} bytes.  The
> +files larger than @twoexp{31} bytes and up to @twoexp{63} bytes.  The
>  file descriptor @code{filedes} must be opened using @code{open64} since
>  otherwise the large offsets possible with @code{off64_t} will lead to
>  errors with a descriptor in small file mode.
> @@ -848,7 +848,7 @@ is transparently replaced by @code{off64_t}.
>  This type is used similar to @code{off_t}.  The difference is that even
>  on 32 bit machines, where the @code{off_t} type would have 32 bits,
>  @code{off64_t} has 64 bits and so is able to address files up to
> -@math{2^63} bytes in length.
> +@twoexp{63} bytes in length.
>  
>  When compiling with @code{_FILE_OFFSET_BITS == 64} this type is
>  available under the name @code{off_t}.
> diff --git a/manual/macros.texi b/manual/macros.texi
> index f32c86d..9cf8031 100644
> --- a/manual/macros.texi
> +++ b/manual/macros.texi
> @@ -256,4 +256,15 @@ cwd\comments\
>  !posix\comments\
>  @end macro
>  
> +@iftex
> +@macro twoexp{exp}
> +@math{2^{{\exp\}}}
> +@end macro
> +@end iftex
> +@ifnottex
> +@macro twoexp{exp}
> +2^\exp\
> +@end macro
> +@end ifnottex
> +
>  @end ifclear
> diff --git a/manual/stdio.texi b/manual/stdio.texi
> index e407170..5d31774 100644
> --- a/manual/stdio.texi
> +++ b/manual/stdio.texi
> @@ -270,7 +270,7 @@ Locks}.
>  @safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{} @asulock{}}@acunsafe{@acsmem{} @acsfd{} @aculock{}}}
>  This function is similar to @code{fopen} but the stream it returns a
>  pointer for is opened using @code{open64}.  Therefore this stream can be
> -used even on files larger than @math{2^31} bytes on 32 bit machines.
> +used even on files larger than @twoexp{31} bytes on 32 bit machines.
>  
>  Please note that the return type is still @code{FILE *}.  There is no
>  special @code{FILE} type for the LFS interface.
> @@ -336,7 +336,7 @@ interface replaces transparently the old interface.
>  @safety{@prelim{}@mtsafe{}@asunsafe{@asucorrupt{}}@acunsafe{@acucorrupt{} @acsfd{}}}
>  This function is similar to @code{freopen}.  The only difference is that
>  on 32 bit machine the stream returned is able to read beyond the
> -@math{2^31} bytes limits imposed by the normal interface.  It should be
> +@twoexp{31} bytes limits imposed by the normal interface.  It should be
>  noted that the stream pointed to by @var{stream} need not be opened
>  using @code{fopen64} or @code{freopen64} since its mode is not important
>  for this function.
> @@ -4412,7 +4412,7 @@ This function is similar to @code{ftello} with the only difference that
>  the return value is of type @code{off64_t}.  This also requires that the
>  stream @var{stream} was opened using either @code{fopen64},
>  @code{freopen64}, or @code{tmpfile64} since otherwise the underlying
> -file operations to position the file pointer beyond the @math{2^31}
> +file operations to position the file pointer beyond the @twoexp{31}
>  bytes limit might fail.
>  
>  If the sources are compiled with @code{_FILE_OFFSET_BITS == 64} on a 32
> @@ -4473,7 +4473,7 @@ the @var{offset} parameter is of type @code{off64_t}.  This also
>  requires that the stream @var{stream} was opened using either
>  @code{fopen64}, @code{freopen64}, or @code{tmpfile64} since otherwise
>  the underlying file operations to position the file pointer beyond the
> -@math{2^31} bytes limit might fail.
> +@twoexp{31} bytes limit might fail.
>  
>  If the sources are compiled with @code{_FILE_OFFSET_BITS == 64} on a 32
>  bits machine this function is available under the name @code{fseeko}

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