1 files changed, 55 insertions, 0 deletions
diff --git a/utils.c b/utils.c
new file mode 100644
index 0000000..2b2cac1
--- /dev/null
+++ b/utils.c
@@ -0,0 +1,55 @@
+
+#define _GNU_SOURCE
+#include <stdio.h>
+#undef _GNU_SOURCE
+#include <stdlib.h>
+
+#include "utils.h"
+
+int write_int(const char *path, int val)
+{
+	FILE *f;
+
+	f = fopen(path, "w");
+	if (!f) {
+		fprintf(stderr, "failed to open '%s': %m\n", path);
+		return -1;
+	}
+
+	fprintf(f, "%d", val);
+
+	fclose(f);
+
+	return 0;
+}
+
+int read_int(const char *path, int *val)
+{
+	FILE *f;
+
+	f = fopen(path, "r");
+
+	if (!f) {
+		fprintf(stderr, "failed to open '%s': %m\n", path);
+		return -1;
+	}
+
+	fscanf(f, "%d", val);
+
+	fclose(f);
+
+	return 0;
+}
+
+int store_line(const char *line, void *data)
+{
+	FILE *f = data;
+
+	/* ignore comment line */
+	if (line[0] == '#')
+		return 0;
+
+	fprintf(f, "%s", line);
+
+	return 0;
+}