Repatch (from linux) of OSX IRAF

1 files changed, 56 insertions, 0 deletions

diff --git a/pkg/system/help/lroff/nextcmd.x b/pkg/system/help/lroff/nextcmd.x
new file mode 100644
index 00000000..d4b09f44
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+++ b/pkg/system/help/lroff/nextcmd.x
@@ -0,0 +1,56 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<ctype.h>
+include	"lroff.h"
+
+.help nextcmd
+.nf ________________________________________________________________________
+NEXTCMD -- Examine the input line; if it is an Lroff directive, return
+the integer code of the directive, otherwise NULL.  Leave IP pointing
+to the argument field if a command, otherwise leave it pointing at the
+first char of the text line.  Note that the "directives" string must
+match the opcode definitions given in lroff.h
+.endhelp ___________________________________________________________________
+
+define	SZ_OPCODE	2
+
+int procedure nextcmd (linebuf, ip)
+
+char	linebuf[ARB]
+int	ip, op
+char	opcode[SZ_OPCODE]
+int	command, kwp, strmatch(), strncmp()
+string	directives "finfjunjrjshihnhbrcespinlslebptpkskehrhn"
+
+begin
+	if (linebuf[1] != '.')			# not a command line?
+	    return (NULL)
+	if (strmatch (linebuf, "^.endhelp") > 0)
+	    return (ENDHELP)
+	ip = 2					# skip the '.'
+
+	# Directives may be either upper or lower case.
+	for (op=1;  op <= SZ_OPCODE;  op=op+1) {
+	    opcode[op] = linebuf[ip]
+	    if (IS_UPPER (opcode[op]))
+		opcode[op] = TO_LOWER (opcode[op])
+	    ip = ip + 1
+	}
+
+	# Just in case a directive happens to be longer than 2 chars, make
+	# sure IP points past the directive name.
+	while (IS_ALPHA (linebuf[ip]))
+	    ip = ip + 1
+
+	# Lookup directive, return opcode number if found.
+	command = NULL
+	for (kwp=1;  directives[kwp] != EOS;  kwp=kwp+SZ_OPCODE)
+	    if (strncmp (opcode, directives[kwp], SZ_OPCODE) == 0) {
+		command = (kwp+1) / SZ_OPCODE
+		break
+	    }
+
+	if (command == NULL)			# unrecognized directive
+	    ip = 1		
+	return (command)
+end