remove ternary operator in rainbow to compute max

clang-tidy9.0.0 added a new check: bugprone-branch-clone
(https://releases.llvm.org/9.0.0/tools/clang/tools/extra/docs/ReleaseNotes.html)
This doesn't like both branches of an if are the same.
This lead to a warning in rainbow, as where the maximum of two values (which
are always the same) is computed in a macro.
I don't always agree with this warning, but here I think it's worth to
remove the macro.

crypto_sign/rainbowIIIc-classic/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWIIICCLASSIC_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowIIIc-classic/clean/rainbow_config.h

@@ -9,6 +9,7 @@
 #define _V1 68
 #define _O1 36
 #define _O2 36
+#define _MAX_O 36
 #define _HASH_LEN 48
 
 
@@ -27,6 +28,7 @@
 #define _V2_BYTE (_V2)
 #define _O1_BYTE (_O1)
 #define _O2_BYTE (_O2)
+#define _MAX_O_BYTE (_MAX_O)
 #define _PUB_N_BYTE (_PUB_N)
 #define _PUB_M_BYTE (_PUB_M)
 

crypto_sign/rainbowIIIc-cyclic-compressed/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWIIICCYCLICCOMPRESSED_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowIIIc-cyclic-compressed/clean/rainbow_config.h

@@ -9,6 +9,7 @@
 #define _V1 68
 #define _O1 36
 #define _O2 36
+#define _MAX_O 36
 #define _HASH_LEN 48
 
 
@@ -27,6 +28,7 @@
 #define _V2_BYTE (_V2)
 #define _O1_BYTE (_O1)
 #define _O2_BYTE (_O2)
+#define _MAX_O_BYTE (_MAX_O)
 #define _PUB_N_BYTE (_PUB_N)
 #define _PUB_M_BYTE (_PUB_M)
 

crypto_sign/rainbowIIIc-cyclic/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWIIICCYCLIC_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowIIIc-cyclic/clean/rainbow_config.h

@@ -9,6 +9,7 @@
 #define _V1 68
 #define _O1 36
 #define _O2 36
+#define _MAX_O 36
 #define _HASH_LEN 48
 
 
@@ -27,6 +28,7 @@
 #define _V2_BYTE (_V2)
 #define _O1_BYTE (_O1)
 #define _O2_BYTE (_O2)
+#define _MAX_O_BYTE (_MAX_O)
 #define _PUB_N_BYTE (_PUB_N)
 #define _PUB_M_BYTE (_PUB_M)
 

crypto_sign/rainbowIa-classic/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWIACLASSIC_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowIa-classic/clean/rainbow_config.h

@@ -10,6 +10,7 @@
 #define _V1 32
 #define _O1 32
 #define _O2 32
+#define _MAX_O 32
 #define _HASH_LEN 32
 
 
@@ -28,6 +29,7 @@
 #define _V2_BYTE (_V2 / 2)
 #define _O1_BYTE (_O1 / 2)
 #define _O2_BYTE (_O2 / 2)
+#define _MAX_O_BYTE (_MAX_O / 2)
 #define _PUB_N_BYTE (_PUB_N / 2)
 #define _PUB_M_BYTE (_PUB_M / 2)
 

crypto_sign/rainbowIa-cyclic-compressed/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWIACYCLICCOMPRESSED_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowIa-cyclic-compressed/clean/rainbow_config.h

@@ -10,6 +10,7 @@
 #define _V1 32
 #define _O1 32
 #define _O2 32
+#define _MAX_O 32
 #define _HASH_LEN 32
 
 
@@ -28,6 +29,7 @@
 #define _V2_BYTE (_V2 / 2)
 #define _O1_BYTE (_O1 / 2)
 #define _O2_BYTE (_O2 / 2)
+#define _MAX_O_BYTE (_MAX_O / 2)
 #define _PUB_N_BYTE (_PUB_N / 2)
 #define _PUB_M_BYTE (_PUB_M / 2)
 

crypto_sign/rainbowIa-cyclic/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWIACYCLIC_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowIa-cyclic/clean/rainbow_config.h

@@ -10,6 +10,7 @@
 #define _V1 32
 #define _O1 32
 #define _O2 32
+#define _MAX_O 32
 #define _HASH_LEN 32
 
 
@@ -28,6 +29,7 @@
 #define _V2_BYTE (_V2 / 2)
 #define _O1_BYTE (_O1 / 2)
 #define _O2_BYTE (_O2 / 2)
+#define _MAX_O_BYTE (_MAX_O / 2)
 #define _PUB_N_BYTE (_PUB_N / 2)
 #define _PUB_M_BYTE (_PUB_M / 2)
 

crypto_sign/rainbowVc-classic/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWVCCLASSIC_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowVc-classic/clean/rainbow_config.h

@@ -9,6 +9,7 @@
 #define _V1 92
 #define _O1 48
 #define _O2 48
+#define _MAX_O 48
 #define _HASH_LEN 64
 
 
@@ -27,6 +28,7 @@
 #define _V2_BYTE (_V2)
 #define _O1_BYTE (_O1)
 #define _O2_BYTE (_O2)
+#define _MAX_O_BYTE (_MAX_O)
 #define _PUB_N_BYTE (_PUB_N)
 #define _PUB_M_BYTE (_PUB_M)
 

crypto_sign/rainbowVc-cyclic-compressed/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWVCCYCLICCOMPRESSED_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowVc-cyclic-compressed/clean/rainbow_config.h

@@ -9,6 +9,7 @@
 #define _V1 92
 #define _O1 48
 #define _O2 48
+#define _MAX_O 48
 #define _HASH_LEN 64
 
 
@@ -27,6 +28,7 @@
 #define _V2_BYTE (_V2)
 #define _O1_BYTE (_O1)
 #define _O2_BYTE (_O2)
+#define _MAX_O_BYTE (_MAX_O)
 #define _PUB_N_BYTE (_PUB_N)
 #define _PUB_M_BYTE (_PUB_M)
 

crypto_sign/rainbowVc-cyclic/clean/rainbow.c

@@ -15,8 +15,6 @@
 #include <string.h>
 
 #define MAX_ATTEMPT_FRMAT 128
-#define _MAX_O ((_O1 > _O2) ? _O1 : _O2)
-#define _MAX_O_BYTE ((_O1_BYTE > _O2_BYTE) ? _O1_BYTE : _O2_BYTE)
 
 int PQCLEAN_RAINBOWVCCYCLIC_CLEAN_rainbow_sign(uint8_t *signature, const sk_t *sk, const uint8_t *_digest) {
     uint8_t mat_l1[_O1 * _O1_BYTE];

crypto_sign/rainbowVc-cyclic/clean/rainbow_config.h

@@ -9,6 +9,7 @@
 #define _V1 92
 #define _O1 48
 #define _O2 48
+#define _MAX_O 48
 #define _HASH_LEN 64
 
 
@@ -27,6 +28,7 @@
 #define _V2_BYTE (_V2)
 #define _O1_BYTE (_O1)
 #define _O2_BYTE (_O2)
+#define _MAX_O_BYTE (_MAX_O)
 #define _PUB_N_BYTE (_PUB_N)
 #define _PUB_M_BYTE (_PUB_M)