--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netdiff/renpart/mainproc.c	Mon Sep 07 04:02:14 2020 +0000
@@ -0,0 +1,121 @@
+#include <ctype.h>
+#include <string.h>
+#include <strings.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "struct.h"
+
+extern struct part_rename *part_rename_list;
+
+#define	MAX_FIELDS	2
+
+static char *infname;
+static FILE *inf;
+static char linebuf[512];
+static int lineno;
+static char *fields[MAX_FIELDS];
+static unsigned nfields;
+
+static
+get_line()
+{
+	if (!fgets(linebuf, sizeof linebuf, inf))
+		return(0);
+	lineno++;
+	if (!index(linebuf, '\n')) {
+		fprintf(stderr, "%s line %d: missing newline\n",
+			infname, lineno);
+		exit(1);
+	}
+	return(1);
+}
+
+static void
+parse_into_fields()
+{
+	char *cp;
+
+	nfields = 0;
+	for (cp = linebuf; ; ) {
+		while (isspace(*cp))
+			cp++;
+		if (*cp == '\0' || *cp == '#')
+			break;
+		if (nfields >= MAX_FIELDS) {
+			fprintf(stderr, "%s line %d: too many fields\n",
+				infname, lineno);
+			exit(1);
+		}
+		fields[nfields++] = cp;
+		while (*cp) {
+			if (isspace(*cp)) {
+				*cp++ = '\0';
+				break;
+			}
+			if (*cp++ != '\\')
+				continue;
+			switch (*cp++) {
+			case '\\':
+			case 'n':
+			case 'r':
+			case 't':
+			case ' ':
+			case '\t':
+				continue;
+			default:
+				fprintf(stderr, "%s line %d: invalid escape\n",
+					infname, lineno);
+				exit(1);
+			}
+		}
+	}
+}
+
+static void
+process_netpoint()
+{
+	char *cp, *refdes;
+	struct part_rename *rp;
+
+	cp = index(fields[1], '.');
+	if (!cp) {
+		fprintf(stderr, "%s line %d: expected '.' not found\n",
+			infname, lineno);
+		exit(1);
+	}
+	*cp++ = '\0';
+	refdes = fields[1];
+	for (rp = part_rename_list; rp; rp = rp->next) {
+		if (!strcmp(refdes, rp->old)) {
+			refdes = rp->new;
+			break;
+		}
+	}
+	printf("%s\t%s.%s\n", fields[0], refdes, cp);
+}
+
+main_process(input_filename)
+	char *input_filename;
+{
+	infname = input_filename;
+	inf = fopen(infname, "r");
+	if (!inf) {
+		perror(infname);
+		exit(1);
+	}
+	for (;;) {
+		if (!get_line())
+			break;
+		parse_into_fields();
+		if (!nfields)
+			continue;
+		if (nfields != 2) {
+			fprintf(stderr, "%s line %d: expected 2 fields\n",
+				infname, lineno);
+			exit(1);
+		}
+		process_netpoint();
+	}
+	fclose(inf);
+	return(0);
+}