Initial commit

1 files changed, 40 insertions, 0 deletions

diff --git a/unix/boot/spp/rpp/rpprat/balpar.r b/unix/boot/spp/rpp/rpprat/balpar.r
new file mode 100644
index 00000000..8e0388b8
--- /dev/null
+++ b/unix/boot/spp/rpp/rpprat/balpar.r
@@ -0,0 +1,40 @@
+#-h-  balpar			  854  local   12/01/80  15:53:46
+# balpar - copy balanced paren string
+   include  defs
+
+   subroutine balpar
+
+   character t, token (MAXTOK)
+   character gettok, gnbtok
+
+   integer nlpar
+
+   if (gnbtok (token, MAXTOK) != LPAREN) {
+      call synerr ("missing left paren.")
+      return
+      }
+   call outstr (token)
+   nlpar = 1
+   repeat {
+      t = gettok (token, MAXTOK)
+      if (t == SEMICOL | t == LBRACE | t == RBRACE | t == EOF) {
+	 call pbstr (token)
+	 break
+	 }
+      if (t == NEWLINE)      # delete newlines
+	 token (1) = EOS
+      else if (t == LPAREN)
+	 nlpar = nlpar + 1
+      else if (t == RPAREN)
+	 nlpar = nlpar - 1
+      if (t == ALPHA)
+	 call squash (token)
+      # else nothing special
+      call outstr (token)
+      } until (nlpar <= 0)
+
+   if (nlpar != 0)
+      call synerr ("missing parenthesis in condition.")
+
+   return
+   end