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avutil/bprint: C++ compatible AVBPrint definition. 

Previous version reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Vadim Kalinsky 2014-11-24 10:38:05 -05:00 committed by Michael Niedermayer
parent 0cb994dfe3
commit 2db29482f1
1 changed files with 9 additions and 6 deletions
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15
libavutil/bprint.h
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@ -30,9 +30,13 @@
* Define a structure with extra padding to a fixed size
* This helps ensuring binary compatibility with future versions.
*/
#define FF_PAD_STRUCTURE(size, ...) \
#define FF_PAD_STRUCTURE(name, size, ...) \
struct ff_pad_helper_##name { __VA_ARGS__ }; \
typedef struct name { \
__VA_ARGS__ \
char reserved_padding[size - sizeof(struct { __VA_ARGS__ })];
char reserved_padding[size - sizeof(struct ff_pad_helper_##name)]; \
} name;
/**
* Buffer to print data progressively
@ -74,15 +78,14 @@
* internal buffer is large enough to hold a reasonable paragraph of text,
* such as the current paragraph.
*/
typedef struct AVBPrint {
FF_PAD_STRUCTURE(1024,
FF_PAD_STRUCTURE(AVBPrint, 1024,
char *str; /**< string so far */
unsigned len; /**< length so far */
unsigned size; /**< allocated memory */
unsigned size_max; /**< maximum allocated memory */
char reserved_internal_buffer[1];
)
} AVBPrint;
)
/**
* Convenience macros for special values for av_bprint_init() size_max