--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bootmatch/comp_ranges.c	Sat Jun 10 02:55:29 2023 +0000
@@ -0,0 +1,92 @@
+/*
+ * Bootmatch compiler: here we read and parse the *.ranges file.
+ */
+
+#include <sys/types.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "comp_defs.h"
+
+extern struct range range_list[MAX_RANGES];
+extern unsigned range_count;
+
+static void
+process_line(line, filename, lineno)
+	char *line, *filename;
+{
+	char *cp;
+	struct range *rp;
+	u_long hex_start, hex_end;
+
+	for (cp = line; isspace(*cp); cp++)
+		;
+	if (*cp == '\0' || *cp == '#')
+		return;
+	if (!isxdigit(*cp)) {
+inv_syntax:	fprintf(stderr, "%s line %d: invalid syntax\n",
+			filename, lineno);
+		exit(1);
+	}
+	hex_start = strtoul(cp, &cp, 16);
+	if (!isspace(*cp))
+		goto inv_syntax;
+	while (isspace(*cp))
+		cp++;
+	if (!isxdigit(*cp))
+		goto inv_syntax;
+	hex_end = strtoul(cp, &cp, 16);
+	if (*cp && !isspace(*cp))
+		goto inv_syntax;
+	while (isspace(*cp))
+		cp++;
+	if (*cp && *cp != '#')
+		goto inv_syntax;
+	if (hex_start >= BOOT_BLOCK_SIZE) {
+		fprintf(stderr, "%s line %d: start offset is out of range\n",
+			filename, lineno);
+		exit(1);
+	}
+	if (hex_end >= BOOT_BLOCK_SIZE) {
+		fprintf(stderr, "%s line %d: end offset is out of range\n",
+			filename, lineno);
+		exit(1);
+	}
+	if (hex_start >= hex_end) {
+		fprintf(stderr,
+		"%s line %d: end offset must be greater than start offset\n",
+			filename, lineno);
+		exit(1);
+	}
+	if (range_count >= MAX_RANGES) {
+		fprintf(stderr, "%s line %d: too many ranges defined\n",
+			filename, lineno);
+		exit(1);
+	}
+	rp = range_list + range_count;
+	rp->offset = hex_start;
+	rp->nbytes = hex_end - hex_start;
+	range_count++;
+}
+
+void
+read_ranges_file(filename)
+	char *filename;
+{
+	FILE *inf;
+	char linebuf[256];
+	int lineno;
+
+	inf = fopen(filename, "r");
+	if (!inf) {
+		perror(filename);
+		exit(1);
+	}
+	for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++)
+		process_line(linebuf, filename, lineno);
+	fclose(inf);
+	if (!range_count) {
+		fprintf(stderr, "error: no ranges defined in %s\n", filename);
+		exit(1);
+	}
+}