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-rw-r--r--src/fs.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/fs.h b/src/fs.h
new file mode 100644
index 0000000..b71889f
--- /dev/null
+++ b/src/fs.h
@@ -0,0 +1,7 @@
+#ifndef DUCC_FS_H
+#define DUCC_FS_H
+
+// 'ext' must include '.'.
+char* replace_extension(const char* file_name, const char* ext);
+
+#endif