ABS               158 lib/png.c              int pa = ABS(p - a);      // distances to a, b, c
ABS               159 lib/png.c              int pb = ABS(p - b);
ABS               160 lib/png.c              int pc = ABS(p - c);
ABS               233 src/png2swf.c          int pa = ABS(p - a);      // distances to a, b, c
ABS               234 src/png2swf.c          int pb = ABS(p - b);
ABS               235 src/png2swf.c          int pc = ABS(p - c);