[Ffmpeg-devel] SIGN Macro

Colin Ward hitman
Wed Oct 11 12:15:17 CEST 2006


  Hi all.

  What are the generally accepted rules and conventions regarding macros in
public code?  I just performed an svn update and there is now a SIGN macro
defined in libavutil/common.h.  ie.

  #define SIGN(a) ((a) > 0 ? 1 : -1)

  This clashes with a macro defined in the system headers of my OS so I get
lots of warnings.  For FFMPEG macros, weren't people usually prefixing them
with FF_ or something similar, to avoid clashes such as this one?

-- 
/-------------------------------------------------------------------\
[Hitman/Code HQ - 6502/z80/68000/604e/80x86/ARM coder - Amiga rulez!]
[VZ-200/VIC-20/MZ-700/c16/c64*10/c128*8/Plus-4/CPC464/CD32/500*2    ]
[600/1000/1200*2/A4000/SNES/N64/Dreamcast/Athlon 1100/AmigaOne      ]
[Assembly Language: The most fun you can have with your clothes on! ]
\-------------------------------------------------------------------/





More information about the ffmpeg-devel mailing list