1 files changed, 18 insertions, 31 deletions

diff --git a/libtommath/bn_mp_sqrt.c b/libtommath/bn_mp_sqrt.c
index 116fb14..aaeac1d 100644
--- a/libtommath/bn_mp_sqrt.c
+++ b/libtommath/bn_mp_sqrt.c
@@ -1,16 +1,7 @@
 #include "tommath_private.h"
 #ifdef BN_MP_SQRT_C
-/* LibTomMath, multiple-precision integer library -- Tom St Denis
- *
- * LibTomMath is a library that provides multiple-precision
- * integer arithmetic as well as number theoretic functionality.
- *
- * The library was designed directly after the MPI library by
- * Michael Fromberger but has been written from scratch with
- * additional optimizations in place.
- *
- * SPDX-License-Identifier: Unlicense
- */
+/* LibTomMath, multiple-precision integer library -- Tom St Denis */
+/* SPDX-License-Identifier: Unlicense */
 
 #ifndef NO_FLOATING_POINT
 #include <math.h>
@@ -20,9 +11,9 @@
 #endif
 
 /* this function is less generic than mp_n_root, simpler and faster */
-int mp_sqrt(const mp_int *arg, mp_int *ret)
+mp_err mp_sqrt(const mp_int *arg, mp_int *ret)
 {
-   int res;
+   mp_err err;
    mp_int t1, t2;
 #ifndef NO_FLOATING_POINT
    int i, j, k;
@@ -36,7 +27,7 @@ int mp_sqrt(const mp_int *arg, mp_int *ret)
    }
 
    /* easy out */
-   if (mp_iszero(arg) == MP_YES) {
+   if (MP_IS_ZERO(arg)) {
       mp_zero(ret);
       return MP_OKAY;
    }
@@ -45,11 +36,11 @@ int mp_sqrt(const mp_int *arg, mp_int *ret)
 
    i = (arg->used / 2) - 1;
    j = 2 * i;
-   if ((res = mp_init_size(&t1, i+2)) != MP_OKAY) {
-      return res;
+   if ((err = mp_init_size(&t1, i+2)) != MP_OKAY) {
+      return err;
    }
 
-   if ((res = mp_init(&t2)) != MP_OKAY) {
+   if ((err = mp_init(&t2)) != MP_OKAY) {
       goto E2;
    }
 
@@ -99,11 +90,11 @@ int mp_sqrt(const mp_int *arg, mp_int *ret)
 
 #else
 
-   if ((res = mp_init_copy(&t1, arg)) != MP_OKAY) {
-      return res;
+   if ((err = mp_init_copy(&t1, arg)) != MP_OKAY) {
+      return err;
    }
 
-   if ((res = mp_init(&t2)) != MP_OKAY) {
+   if ((err = mp_init(&t2)) != MP_OKAY) {
       goto E2;
    }
 
@@ -113,24 +104,24 @@ int mp_sqrt(const mp_int *arg, mp_int *ret)
 #endif
 
    /* t1 > 0  */
-   if ((res = mp_div(arg, &t1, &t2, NULL)) != MP_OKAY) {
+   if ((err = mp_div(arg, &t1, &t2, NULL)) != MP_OKAY) {
       goto E1;
    }
-   if ((res = mp_add(&t1, &t2, &t1)) != MP_OKAY) {
+   if ((err = mp_add(&t1, &t2, &t1)) != MP_OKAY) {
       goto E1;
    }
-   if ((res = mp_div_2(&t1, &t1)) != MP_OKAY) {
+   if ((err = mp_div_2(&t1, &t1)) != MP_OKAY) {
       goto E1;
    }
    /* And now t1 > sqrt(arg) */
    do {
-      if ((res = mp_div(arg, &t1, &t2, NULL)) != MP_OKAY) {
+      if ((err = mp_div(arg, &t1, &t2, NULL)) != MP_OKAY) {
          goto E1;
       }
-      if ((res = mp_add(&t1, &t2, &t1)) != MP_OKAY) {
+      if ((err = mp_add(&t1, &t2, &t1)) != MP_OKAY) {
          goto E1;
       }
-      if ((res = mp_div_2(&t1, &t1)) != MP_OKAY) {
+      if ((err = mp_div_2(&t1, &t1)) != MP_OKAY) {
          goto E1;
       }
       /* t1 >= sqrt(arg) >= t2 at this point */
@@ -142,11 +133,7 @@ E1:
    mp_clear(&t2);
 E2:
    mp_clear(&t1);
-   return res;
+   return err;
 }
 
 #endif
-
-/* ref:         $Format:%D$ */
-/* git commit:  $Format:%H$ */
-/* commit time: $Format:%ai$ */