21 lines
593 B
Text
21 lines
593 B
Text
divert(-1)
|
|
|
|
#
|
|
# m4 is a macro language, so this is just a matter of defining a
|
|
# macro, using the built-in branching macro "ifelse".
|
|
#
|
|
# ifelse2(x1,x2,y1,y2,exprxy,exprx,expry,expr)
|
|
#
|
|
# Checks if x1 and x2 are equal strings and if y1 and y2 are equal
|
|
# strings.
|
|
#
|
|
define(`ifelse2',
|
|
`ifelse(`$1',`$2',`ifelse(`$3',`$4',`$5',`$6')',
|
|
`ifelse(`$3',`$4',`$7',`$8')')')
|
|
|
|
divert`'dnl
|
|
dnl
|
|
ifelse2(1,1,2,2,`exprxy',`exprx',`expry',`expr')
|
|
ifelse2(1,1,2,-2,`exprxy',`exprx',`expry',`expr')
|
|
ifelse2(1,-1,2,2,`exprxy',`exprx',`expry',`expr')
|
|
ifelse2(1,-1,2,-2,`exprxy',`exprx',`expry',`expr')
|