Repatch (from linux) of OSX IRAF

1 files changed, 38 insertions, 0 deletions

diff --git a/pkg/xtools/strentab.x b/pkg/xtools/strentab.x
new file mode 100644
index 00000000..e2173c47
--- /dev/null
+++ b/pkg/xtools/strentab.x
@@ -0,0 +1,38 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+# STRENTAB -- Procedure to replace blanks with tabs and blanks.
+
+procedure strentab (line, outline, maxch, tabsize)
+
+int   maxch, tabsize
+char  line[ARB], outline[ARB]
+
+int   ip, op, ltab
+
+begin
+	op = 1
+	ip = 1
+
+	repeat {
+	    ltab = ip
+	    while (line[ltab] == ' ' && op <= maxch) {
+		ltab = ltab + 1
+		if (mod(ltab, tabsize) == 1) {
+		    outline[op] = '\t'
+		    ip = ltab
+		    op = op + 1
+		}
+	    }
+	    for (; ip < ltab && op <= maxch; ip = ip + 1) {
+		outline[op] = ' '
+		op = op + 1
+	    }
+	    if (line[ip] == EOS || op >= maxch+1)
+		break
+	    outline[op] = line[ip]
+	    op = op + 1
+	    ip = ip + 1
+	} until (line[ip] == EOS || op >= maxch+1)
+
+	outline[op] = EOS
+end