1 files changed, 70 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/ratlibr/makpat.r b/unix/boot/spp/rpp/ratlibr/makpat.r
new file mode 100644
index 00000000..a310ada7
--- /dev/null
+++ b/unix/boot/spp/rpp/ratlibr/makpat.r
@@ -0,0 +1,70 @@
+include	defs
+
+# makpat --- make pattern from arg (from), terminate at delim
+
+   integer function makpat (arg, from, delim, pat)
+   character arg (MAXARG), delim, pat (MAXPAT)
+   integer from
+
+   character esc
+
+   integer i, j, junk, lastcl, lastj, lj,
+      tagnst, tagnum, tagstk (9)
+   integer addset, getccl, stclos
+
+   j = 1      # pat index
+   lastj = 1
+   lastcl = 0
+   tagnum = 0
+   tagnst = 0
+   for (i = from; arg (i) != delim & arg (i) != EOS; i = i + 1) {
+      lj = j
+      if (arg (i) == ANY)
+	 junk = addset (ANY, pat, j, MAXPAT)
+      else if (arg (i) == BOL & i == from)
+	 junk = addset (BOL, pat, j, MAXPAT)
+      else if (arg (i) == EOL & arg (i + 1) == delim)
+	 junk = addset (EOL, pat, j, MAXPAT)
+      else if (arg (i) == CCL) {
+	 if (getccl (arg, i, pat, j) == ERR) {
+	    makpat = ERR
+	    return
+	    }
+	 }
+      else if (arg (i) == CLOSURE & i > from) {
+	 lj = lastj
+	 if (pat (lj) == BOL | pat (lj) == EOL | pat (lj) == CLOSURE |
+	       pat (lj) == START_TAG | pat (lj) == STOP_TAG)
+	    break
+	 lastcl = stclos (pat, j, lastj, lastcl)
+	 }
+      else if (arg (i) == START_TAG) {
+	 if (tagnum >= 9)    # too many tagged sub-patterns
+	    break
+	 tagnum = tagnum + 1
+	 tagnst = tagnst + 1
+	 tagstk (tagnst) = tagnum
+	 junk = addset (START_TAG, pat, j, MAXPAT)
+	 junk = addset (tagnum, pat, j, MAXPAT)
+	 }
+      else if (arg (i) == STOP_TAG & tagnst > 0) {
+	 junk = addset (STOP_TAG, pat, j, MAXPAT)
+	 junk = addset (tagstk (tagnst), pat, j, MAXPAT)
+	 tagnst = tagnst - 1
+	 }
+      else {
+	 junk = addset (CHAR, pat, j, MAXPAT)
+	 junk = addset (esc (arg, i), pat, j, MAXPAT)
+	 }
+      lastj = lj
+      }
+   if (arg (i) != delim)   # terminated early
+      makpat = ERR
+   else if (addset (EOS, pat, j, MAXPAT) == NO)   # no room
+      makpat = ERR
+   else if (tagnst != 0)
+      makpat = ERR
+   else
+      makpat = i
+   return
+   end