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-rw-r--r--libcrystfel/src/symmetry.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/libcrystfel/src/symmetry.h b/libcrystfel/src/symmetry.h
index 68f17991..6bb6210e 100644
--- a/libcrystfel/src/symmetry.h
+++ b/libcrystfel/src/symmetry.h
@@ -80,6 +80,9 @@ extern const char *symmetry_name(const SymOpList *ops);
extern void set_symmetry_name(SymOpList *ops, const char *name);
extern void describe_symmetry(const SymOpList *s);
+extern int is_centric(signed int h, signed int k, signed int l,
+ const SymOpList *ops);
+
extern void add_symop(SymOpList *ops, IntegerMatrix *m);
#endif /* SYMMETRY_H */