1 files changed, 53 insertions, 0 deletions
diff --git a/unix/boot/spp/rpp/rpprat/squash.r b/unix/boot/spp/rpp/rpprat/squash.r
new file mode 100644
index 00000000..9990fe1a
--- /dev/null
+++ b/unix/boot/spp/rpp/rpprat/squash.r
@@ -0,0 +1,53 @@
+include  defs
+
+# SQUASH - convert a long or special identifier into a Fortran variable
+
+subroutine squash (id)
+
+character id(MAXTOK)
+integer junk, i, j
+integer lookup, ludef
+character newid(MAXTOK), recdid(MAXTOK)
+include COMMON_BLOCKS
+
+	# identify names for which error checking is to be performed
+	if (body == YES & errtbl != NULL & ername == NO)
+	    if (lookup (id, junk, errtbl) == YES)
+		ername = YES
+
+	j = 1
+	for (i=1;  id(i) != EOS;  i=i+1)		# copy, delete '_'
+	    if (IS_LETTER(id(i)) | IS_DIGIT(id(i))) {
+		newid(j) = id(i)
+	        j = j + 1
+	    }
+	newid(j) = EOS
+
+	# done if ordinary (short) Fortran variable
+	if (i-1 < MAXIDLENGTH & i == j)
+	    return
+
+# Otherwise, the identifier (1) is longer than Fortran allows,
+# (2) contains special characters (_ or .), or (3) is the maximum
+# length permitted by the Fortran compiler.  The first two cases
+# obviously call for name conversion; the last case may require conversion
+# to avoid accidental conflicts with automatically generated names.
+
+	if (lookup (id, junk, fkwtbl) == YES)	# Fortran key word?
+	    return				# (must be treated as reserved)
+
+	if (ludef (id, recdid, namtbl) == YES) {   # have we seen this before?
+	    call scopy (recdid, 1, id, 1)
+	    return
+	}
+		
+	call mapid (newid)			# try standard mapping
+	if (lookup (newid, junk, gentbl) == YES) {
+	    call synerr ("Warning: identifier mapping not unique.")
+	    call uniqid (newid)
+	}
+	call entdef (newid, id, gentbl)
+
+	call entdef (id, newid, namtbl)		# record it for posterity
+	call scopy (newid, 1, id, 1)		# substitute it for the old one
+end