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alvaromuir/obj-c_marcos

Created January 5, 2014 17:10
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Some common Objective-C Macros
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obj-c_marcos
#define PI 3.141592654
#define TWO_PI 2.0 * PI
#define SQUARE(x) ((x)*(x))
#define CUBE(x) ((x)*(x)*(x))
#define IS_LEAP_YEAR(y) y % 4 == 0 && y % 100 != 0 || y % 400 == 0
#define IS_LOWER_CASE(x) ( ((x) >= 'a') && ((x) <= 'z'))
#define TO_UPPER(x) (IS_LOWER_CASE(x) ? (x) - 'a' + 'A': (x))
#define INCHES_PER_CENT 0.394
#define CENT_PER_INCH (1/INCHES_PER_CENT)
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