patch, 3 partsremote-testsvn.c: Avoid the getline() GNU extension function

> The getline() function is a GNU extension (you need to define
> _GNU_SOURCE before including stdio.h) and is, therefore, not
> portable. In particular, getline() is not available on MinGW.
>
> In order to support non-GNU systems, we replace the call to
> getline() with (almost) equivalent code using strbuf_getline().
> Note that, unlike getline(), strbuf_getline() removes the
> newline terminator from the returned string. This difference
> in semantics does not matter at this call-site. Also, we note
> that the original code was leaking the memory allocated to
> 'line' by getline().
>
> Signed-off-by: Ramsay Jones ramsay@ramsay1.demon.co.uk

> ---
>
> Hi Florian,
>
> Could you please squash this into commit 0320cef0 ("remote-svn: add
> marks-file regeneration", 22-08-2012).
>
> ATB,
> Ramsay Jones
>
> remote-testsvn.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/remote-testsvn.c b/remote-testsvn.c
> index 09dc304..d0b81d5 100644
> --- a/remote-testsvn.c
> +++ b/remote-testsvn.c
> @@ -121,9 +121,8 @@ static void regenerate_marks(void)
>
> static void check_or_regenerate_marks(int latestrev) {
>  FILE *marksfile;
> - char *line = NULL;
> - size_t linelen = 0;
>  struct strbuf sb = STRBUF_INIT;
> + struct strbuf line = STRBUF_INIT;
>  int found = 0;
>
>  if (latestrev < 1)
> @@ -139,8 +138,8 @@ static void check_or_regenerate_marks(int
>  latestrev) { fclose(marksfile);
>  } else {
>  strbuf_addf(&sb, ":%d ", latestrev);
> - while (getline(&line, &linelen, marksfile) != -1) {
> - if (!prefixcmp(line, sb.buf)) {
> + while (strbuf_getline(&line, marksfile, '\n') != EOF) {
> + if (!prefixcmp(line.buf, sb.buf)) {
>  found++;
>  break;
>  }
> @@ -151,6 +150,7 @@ static void check_or_regenerate_marks(int
>  latestrev) { }
>  free_notes(NULL);
>  strbuf_release(&sb);
> + strbuf_release(&line);
> }
>
> static int cmd_import(const char *line)

> On Sat, Aug 25, 2012 at 7:13 PM, Ramsay Jones
> <ramsay@ramsay1.demon.co.uk> wrote:
>>
>> The getline() function is a GNU extension (you need to define
>> _GNU_SOURCE before including stdio.h) and is, therefore, not
>> portable. In particular, getline() is not available on MinGW.
>
> Actually, getline is a POSIX-2008 feature, so it's not (simply) a GNU extension:
>
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/getline.html

> Erik Faye-Lund <kusmabite@gmail.com> writes:
> 
>> On Sat, Aug 25, 2012 at 7:13 PM, Ramsay Jones
>> <ramsay@ramsay1.demon.co.uk> wrote:
>>>
>>> The getline() function is a GNU extension (you need to define
>>> _GNU_SOURCE before including stdio.h) and is, therefore, not
>>> portable. In particular, getline() is not available on MinGW.
>>
>> Actually, getline is a POSIX-2008 feature, so it's not (simply) a GNU extension:
>>
>> http://pubs.opengroup.org/onlinepubs/9699919799/functions/getline.html
> 
> True, thanks for pointing it out.  Justify the change with something
> like this instead, perhaps?
> 
> 	The getline() function, even though is in POSIX.1-2008, is
> 	not available on some platforms.  Use strbuf_getline() for
> 	portability.
> 
> By the way, the remainder of the proposed log message talks about
> the difference between getline() that keeps the terminating LF vs
> strbuf_getline() that drops it.  Would strbuf_getwholeline() be a
> better alternative?

> On Sat, Aug 25, 2012 at 7:13 PM, Ramsay Jones
> <ramsay@ramsay1.demon.co.uk> wrote:
>>
>> The getline() function is a GNU extension (you need to define
>> _GNU_SOURCE before including stdio.h) and is, therefore, not
>> portable. In particular, getline() is not available on MinGW.
> 
> Actually, getline is a POSIX-2008 feature, so it's not (simply) a GNU extension:
> 
> http://pubs.opengroup.org/onlinepubs/9699919799/functions/getline.html