diff options
Diffstat (limited to 'manual/stdio.texi')
| -rw-r--r-- | manual/stdio.texi | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/manual/stdio.texi b/manual/stdio.texi index 39fd4fb123..977989d95e 100644 --- a/manual/stdio.texi +++ b/manual/stdio.texi @@ -2357,7 +2357,8 @@ make_message (char *name, char *value) @{ /* @r{Reallocate buffer now that we know how much space is needed.} */ - buffer = (char *) xrealloc (buffer, nchars + 1); + size = nchars + 1; + buffer = (char *) xrealloc (buffer, size); if (buffer != NULL) /* @r{Try again.} */ @@ -2392,8 +2393,9 @@ This function is similar to @code{sprintf}, except that it dynamically allocates a string (as with @code{malloc}; @pxref{Unconstrained Allocation}) to hold the output, instead of putting the output in a buffer you allocate in advance. The @var{ptr} argument should be the -address of a @code{char *} object, and @code{asprintf} stores a pointer -to the newly allocated string at that location. +address of a @code{char *} object, and a successful call to +@code{asprintf} stores a pointer to the newly allocated string at that +location. The return value is the number of characters allocated for the buffer, or less than zero if an error occurred. Usually this means that the buffer @@ -4852,8 +4854,9 @@ Got r @comment GNU @deftypefun {FILE *} open_memstream (char **@var{ptr}, size_t *@var{sizeloc}) This function opens a stream for writing to a buffer. The buffer is -allocated dynamically (as with @code{malloc}; @pxref{Unconstrained -Allocation}) and grown as necessary. +allocated dynamically and grown as necessary, using @code{malloc}. +After you've closed the stream, this buffer is your responsibility to +clean up using @code{free} or @code{realloc}. @xref{Unconstrained Allocation}. When the stream is closed with @code{fclose} or flushed with @code{fflush}, the locations @var{ptr} and @var{sizeloc} are updated to @@ -5067,14 +5070,11 @@ You should define the function to perform seek operations on the cookie as: @smallexample -int @var{seeker} (void *@var{cookie}, fpos_t *@var{position}, int @var{whence}) +int @var{seeker} (void *@var{cookie}, off64_t *@var{position}, int @var{whence}) @end smallexample For this function, the @var{position} and @var{whence} arguments are -interpreted as for @code{fgetpos}; see @ref{Portable Positioning}. In -the GNU library, @code{fpos_t} is equivalent to @code{off_t} or -@code{long int}, and simply represents the number of bytes from the -beginning of the file. +interpreted as for @code{fgetpos}; see @ref{Portable Positioning}. After doing the seek operation, your function should store the resulting file position relative to the beginning of the file in @var{position}. |