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Add doxy comments for macro GET_UTF8 

another fix in PUT_UTF8 doxy description

Originally committed as revision 6917 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Guillaume Poirier 2006-11-06 12:38:00 +00:00
parent 79e7b9609e
commit d73427e347
1 changed files with 14 additions and 2 deletions
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16
libavutil/common.h
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@ -322,6 +322,18 @@ static inline int ff_get_fourcc(const char *s){
#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
#define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
/*!
* \def GET_UTF8(val, GET_BYTE, ERROR)
* converts a utf-8 character (up to 4 bytes long) to its 32-bit ucs-4 encoded form
* \param val is the output and should be of type uint32_t. It holds the converted
* ucs-4 character and should be a left value.
* \param GET_BYTE gets utf-8 encoded bytes from any proper source. It can be
* a function or a statement whose return value or evaluated value is of type
* uint8_t. It will be execuded up to 4 times.
* \param ERROR action that should be taken when an invalid utf-8 byte is returned
* from GET_BYTE. It should be a statement that jumps out of the macro,
* like exit(), goto, return, break, or continue.
*/
#define GET_UTF8(val, GET_BYTE, ERROR)\
val= GET_BYTE;\
{\
@ -339,7 +351,7 @@ static inline int ff_get_fourcc(const char *s){
/*!
* \def PUT_UTF8(val, tmp, PUT_BYTE)
* converts a 32-bit unicode character to its utf-8 encoded form (up to 6 bytes long).
* converts a 32-bit unicode character to its utf-8 encoded form (up to 4 bytes long).
* \param val is an input only argument and should be of type uint32_t. It holds
* a ucs4 encoded unicode character that is to be converted to utf-8. If
* val is given as a function it's executed only once.
@ -349,7 +361,7 @@ static inline int ff_get_fourcc(const char *s){
* \param PUT_BYTE writes the converted utf-8 bytes to any proper destination.
* It could be a function or a statement, and uses tmp as the input byte.
* For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
* executed up to 6 times, depending on the length of the converted
* executed up to 4 times, depending on the length of the converted
* unicode character.
*/
#define PUT_UTF8(val, tmp, PUT_BYTE)\