diff options
Diffstat (limited to 'src/arith_uint256.h')
| -rw-r--r-- | src/arith_uint256.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/arith_uint256.h b/src/arith_uint256.h index 0f6b3d4fba..c7734035df 100644 --- a/src/arith_uint256.h +++ b/src/arith_uint256.h @@ -31,12 +31,16 @@ public: base_uint() { + static_assert(BITS/32 > 0 && BITS%32 == 0, "Template parameter BITS must be a positive multiple of 32."); + for (int i = 0; i < WIDTH; i++) pn[i] = 0; } base_uint(const base_uint& b) { + static_assert(BITS/32 > 0 && BITS%32 == 0, "Template parameter BITS must be a positive multiple of 32."); + for (int i = 0; i < WIDTH; i++) pn[i] = b.pn[i]; } @@ -50,6 +54,8 @@ public: base_uint(uint64_t b) { + static_assert(BITS/32 > 0 && BITS%32 == 0, "Template parameter BITS must be a positive multiple of 32."); + pn[0] = (unsigned int)b; pn[1] = (unsigned int)(b >> 32); for (int i = 2; i < WIDTH; i++) @@ -174,7 +180,7 @@ public: { // prefix operator int i = 0; - while (++pn[i] == 0 && i < WIDTH-1) + while (i < WIDTH && ++pn[i] == 0) i++; return *this; } @@ -191,7 +197,7 @@ public: { // prefix operator int i = 0; - while (--pn[i] == (uint32_t)-1 && i < WIDTH-1) + while (i < WIDTH && --pn[i] == (uint32_t)-1) i++; return *this; } |