FFmpeg
jacosub.h
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1 /*
2  * Copyright (c) 2012 Clément Bœsch
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * JACOsub shared utils
24  */
25 
26 #ifndef AVCODEC_JACOSUB_H
27 #define AVCODEC_JACOSUB_H
28 
29 #include "libavutil/common.h"
30 
31 #define JSS_MAX_LINESIZE 512
32 
34 {
35  return c == ' ' || (c >= '\t' && c <= '\r');
36 }
37 
38 static av_always_inline const char *jss_skip_whitespace(const char *p)
39 {
40  while (jss_whitespace(*p))
41  p++;
42  return p;
43 }
44 
45 #endif /* AVCODEC_JACOSUB_H */
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
jss_whitespace
static av_always_inline int jss_whitespace(char c)
Definition: jacosub.h:33
jss_skip_whitespace
static const av_always_inline char * jss_skip_whitespace(const char *p)
Definition: jacosub.h:38
common.h
av_always_inline
#define av_always_inline
Definition: attributes.h:49