Some more overflow checks

1 files changed, 4 insertions, 0 deletions

diff --git a/src/debug.h b/src/debug.h
index 69b0a7c..e58c1d5 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -25,6 +25,10 @@ bool is_quiet_mode();
 bool is_issue(uint issue);
 bool is_legacy_mode();
 
+#define check_int_mult_overflow(m,n) \
+  { auto x = m * n;                                      \
+    enforce_msg(x / m == n, "multiply integer overflow"); }
+
 gsl_matrix *gsl_matrix_safe_alloc(size_t rows,size_t cols);
 int gsl_matrix_safe_memcpy (gsl_matrix *dest, const gsl_matrix *src);
 void gsl_matrix_safe_free (gsl_matrix *v);