1 files changed, 58 insertions, 0 deletions
diff --git a/metapost/context/base/mpii/mp-func.mpii b/metapost/context/base/mpii/mp-func.mpii
new file mode 100644
index 000000000..94e400b91
--- /dev/null
+++ b/metapost/context/base/mpii/mp-func.mpii
@@ -0,0 +1,58 @@
+%D \module
+%D   [       file=mp-func.mpii,
+%D        version=2001.12.29,
+%D          title=\CONTEXT\ \METAPOST\ graphics,
+%D       subtitle=function hacks,
+%D         author=Hans Hagen,
+%D           date=\currentdate,
+%D      copyright={PRAGMA / Hans Hagen \& Ton Otten}]
+%C
+%C This module is part of the \CONTEXT\ macro||package and is
+%C therefore copyrighted by \PRAGMA. See licen-en.pdf for
+%C details.
+
+%D Under construction.
+
+if known context_func : endinput ; fi ;
+
+boolean context_func ; context_func := true ;
+
+string pathconnectors[] ;
+
+pathconnectors[0] := ","   ;
+pathconnectors[1] := "--"  ;
+pathconnectors[2] := ".."  ;
+pathconnectors[3] := "..." ;
+
+vardef function (expr f) (expr u, t, b, e, s) = save x ; numeric x ;
+  for xx := b step s until e :
+    hide (x := xx ;) if xx>b : scantokens(pathconnectors[f]) fi
+    (scantokens(u),scantokens(t))
+  endfor
+enddef ;
+
+def punkedfunction = function (1) enddef ;
+def curvedfunction = function (2) enddef ;
+def tightfunction  = function (3) enddef ;
+
+vardef constructedpath (expr f) (text t) =
+  save ok ; boolean ok ; ok := false ;
+  for i=t :
+    if ok : scantokens(pathconnectors[f]) else : ok := true ; fi i
+  endfor
+enddef ;
+
+def punkedpath = constructedpath (1) enddef ;
+def curvedpath = constructedpath (2) enddef ;
+def tightpath  = constructedpath (3) enddef ;
+
+vardef constructedpairs (expr f) (text p) =
+  save i ; i := -1 ;
+  forever : exitif unknown p[incr(i)] ;
+    if i>0 : scantokens(pathconnectors[f]) fi p[i]
+  endfor
+enddef ;
+
+def punkedpairs = constructedpairs (1) enddef ;
+def curvedpairs = constructedpairs (2) enddef ;
+def tightpairs  = constructedpairs (3) enddef ;