[FFmpeg-devel] [PATCH] lavf/aviobuf: add ff_get_line2() variant
Michael Niedermayer
michael at niedermayer.cc
Thu Oct 13 22:59:19 EEST 2016
On Thu, Oct 13, 2016 at 07:40:59PM +0200, Stefano Sabatini wrote:
> This allows to probe if the read line was partially discarded.
> ---
> libavformat/aviobuf.c | 10 +++++++++-
> libavformat/internal.h | 14 ++++++++++++++
> 2 files changed, 23 insertions(+), 1 deletion(-)
>
> diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
> index 134d627..28183b4 100644
> --- a/libavformat/aviobuf.c
> +++ b/libavformat/aviobuf.c
> @@ -764,18 +764,26 @@ unsigned int avio_rb32(AVIOContext *s)
>
> int ff_get_line(AVIOContext *s, char *buf, int maxlen)
> {
> - int i = 0;
> + return ff_get_line2(s, buf, maxlen, NULL);
> +}
> +
> +int ff_get_line2(AVIOContext *s, char *buf, int maxlen, int *readlen)
> +{
> + int i = 0, j = 0;
> char c;
>
> do {
> c = avio_r8(s);
> if (c && i < maxlen-1)
> buf[i++] = c;
> + j++;
> } while (c != '\n' && c != '\r' && c);
"\n" and "\0" would i belive both have a j=1 but they would have
differig i
is that intended ? (seems to me that this would make truncation
detection more annoying)
or am i missing something that avoids this difference?
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The educated differ from the uneducated as much as the living from the
dead. -- Aristotle
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