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-rw-r--r--pkg/xtools/strdetab.x30
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diff --git a/pkg/xtools/strdetab.x b/pkg/xtools/strdetab.x
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+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# STRDETAB -- Procedure to remove tabs from a line of text and replace with
+# blanks.
+
+procedure strdetab (line, outline, maxch, tabsize)
+
+int ip, op, maxch, tabsize
+char line[ARB], outline [ARB]
+
+begin
+ op=1
+ ip=1
+
+ while (line[ip] != EOS && op <= maxch) {
+ if (line[ip] == '\t') {
+ repeat {
+ outline[op] = ' '
+ op = op + 1
+ } until ((mod (op, tabsize) == 1) || (op > maxch))
+ ip = ip + 1
+ } else {
+ outline[op] = line[ip]
+ op = op + 1
+ ip = ip + 1
+ }
+ }
+
+ outline[op] = EOS
+end