Update LibTomMath to 1.2.0 (#84)

* update C files

* update other files

* update headers

* update makefiles

* remove mp_set/get_double()

* use ltm 1.2.0 API

* update ltm_desc

* use bundled tommath if system-tommath is too old

* XMALLOC etc. were changed to MP_MALLOC etc.

1 files changed, 27 insertions, 0 deletions

diff --git a/libtommath/bn_mp_error_to_string.c b/libtommath/bn_mp_error_to_string.c
new file mode 100644
index 0000000..2e2adb0
--- /dev/null
+++ b/libtommath/bn_mp_error_to_string.c
@@ -0,0 +1,27 @@
+#include "tommath_private.h"
+#ifdef BN_MP_ERROR_TO_STRING_C
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
+
+/* return a char * string for a given code */
+const char *mp_error_to_string(mp_err code)
+{
+   switch (code) {
+   case MP_OKAY:
+      return "Successful";
+   case MP_ERR:
+      return "Unknown error";
+   case MP_MEM:
+      return "Out of heap";
+   case MP_VAL:
+      return "Value out of range";
+   case MP_ITER:
+      return "Max. iterations reached";
+   case MP_BUF:
+      return "Buffer overflow";
+   default:
+      return "Invalid error code";
+   }
+}
+
+#endif