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-rw-r--r--libcrystfel/src/cell-utils.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/libcrystfel/src/cell-utils.c b/libcrystfel/src/cell-utils.c
index 605aa449..a36ebe1c 100644
--- a/libcrystfel/src/cell-utils.c
+++ b/libcrystfel/src/cell-utils.c
@@ -1570,7 +1570,9 @@ int cell_is_sensible(UnitCell *cell)
* lattice is a conventional Bravais lattice.
* Warnings are printied if any of the checks are failed.
*
- * Returns: true if cell is invalid.
+ * Returns: zero if the cell is fine, 1 if it is unconventional but otherwise
+ * OK (e.g. left-handed or not a Bravais lattice), and 2 if there is a serious
+ * problem such as the parameters being physically impossible.
*
*/
int validate_cell(UnitCell *cell)
@@ -1580,7 +1582,7 @@ int validate_cell(UnitCell *cell)
if ( cell_has_parameters(cell) && !cell_is_sensible(cell) ) {
ERROR("WARNING: Unit cell parameters are not sensible.\n");
- err = 1;
+ err = 2;
}
if ( !bravais_lattice(cell) ) {
@@ -1604,7 +1606,7 @@ int validate_cell(UnitCell *cell)
|| ((cen == 'C') && (ua == 'c')) ) {
ERROR("WARNING: A, B or C centering matches unique"
" axis.\n");
- err = 1;
+ err = 2;
}
}