1 files changed, 32 insertions, 0 deletions
diff --git a/libgamma_strerror.c b/libgamma_strerror.c
new file mode 100644
index 0000000..c252a49
--- /dev/null
+++ b/libgamma_strerror.c
@@ -0,0 +1,32 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Get a description of an error
+ * 
+ * @param   error_code  The error code, may be an `errno` value, if
+ *                      `LIBGAMMA_ERRNO_SET`, the current value of `errno`
+ *                      will be used
+ * @return              The description associated with the error code,
+ *                      `NULL` if the error code is not recognised
+ */
+const char *
+libgamma_strerror(int error_code)
+{
+	const char *desc;
+	if (error_code == LIBGAMMA_ERRNO_SET)
+		error_code = errno;
+	switch (error_code) {
+#define X(NAME, DESC)\
+	case NAME:\
+		desc = #NAME;\
+		break;
+	LIST_ERRORS(X)
+#undef X
+	default:
+		desc = NULL;
+		break;
+	}
+	return desc ? desc : error_code < 0 ? NULL : strerror(error_code);
+}