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varmod-order-numeric.mk revision 1.4 
      1  1.4  rillig # $NetBSD: varmod-order-numeric.mk,v 1.4 2021/07/31 20:55:46 rillig Exp $
      2  1.1     sjg #
      3  1.1     sjg # Tests for the :On variable modifier, which returns the words, sorted in
      4  1.1     sjg # ascending numeric order.
      5  1.1     sjg 
      6  1.2  rillig # This list contains only 32-bit numbers since the make code needs to conform
      7  1.2  rillig # to C90, which does not provide integer types larger than 32 bit.  It uses
      8  1.2  rillig # 'long long' by default, but that type is overridable if necessary.
      9  1.2  rillig # To get 53-bit integers even in C90, it would be possible to switch to
     10  1.2  rillig # 'double' instead, but that would allow floating-point numbers as well, which
     11  1.2  rillig # is out of scope for this variable modifier.
     12  1.2  rillig NUMBERS=	3 5 7 1 42 -42 5K -3m 1M 1k -2G
     13  1.1     sjg 
     14  1.2  rillig .if ${NUMBERS:On} != "-2G -3m -42 1 3 5 7 42 1k 5K 1M"
     15  1.1     sjg .  error ${NUMBERS:On}
     16  1.1     sjg .endif
     17  1.1     sjg 
     18  1.2  rillig .if ${NUMBERS:Orn} != "1M 5K 1k 42 7 5 3 1 -42 -3m -2G"
     19  1.1     sjg .  error ${NUMBERS:Orn}
     20  1.1     sjg .endif
     21  1.1     sjg 
     22  1.2  rillig # Both ':Onr' and ':Orn' have the same effect.
     23  1.2  rillig .if ${NUMBERS:Onr} != "1M 5K 1k 42 7 5 3 1 -42 -3m -2G"
     24  1.2  rillig .  error ${NUMBERS:Onr}
     25  1.2  rillig .endif
     26  1.2  rillig 
     27  1.4  rillig # If there are several numbers that have the same integer value, they are
     28  1.4  rillig # returned in unspecified order.
     29  1.4  rillig SAME_VALUE:=	${:U 79 80 0x0050 81 :On}
     30  1.4  rillig .if ${SAME_VALUE} != "79 80 0x0050 81" && ${SAME_VALUE} != "79 0x0050 80 81"
     31  1.4  rillig .  error ${SAME_VALUE}
     32  1.2  rillig .endif
     33  1.2  rillig 
     34  1.4  rillig # Hexadecimal and octal numbers are supported as well.
     35  1.4  rillig OCTAL=		0 010 0x7 9
     36  1.4  rillig .if ${OCTAL:On} != "0 0x7 010 9"
     37  1.4  rillig .  error ${OCTAL:On}
     38  1.2  rillig .endif
     39  1.2  rillig 
     40  1.1     sjg all:
     41