2fa11b6d3
Denys Vlasenko
2018-12-06
Subject
bc: add comment about BC_NUM_DEF_SIZE
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miscutils/bc.c+12 -11
| @@ -205,9 +205,6 @@ typedef struct BcVec { | |
| BcVecFree dtor; | |
| } BcVec; | |
| - | #define bc_vec_pop(v) (bc_vec_npop((v), 1)) |
| - | #define bc_vec_top(v) (bc_vec_item_rev((v), 0)) |
| - | |
| typedef signed char BcDig; | |
| typedef struct BcNum { | |
| @@ -218,16 +215,17 @@ typedef struct BcNum { | |
| bool neg; | |
| } BcNum; | |
| - | #define BC_NUM_MIN_BASE ((unsigned long) 2) |
| - | #define BC_NUM_MAX_IBASE ((unsigned long) 16) |
| - | #define BC_NUM_DEF_SIZE (16) |
| - | #define BC_NUM_PRINT_WIDTH (69) |
| + | #define BC_NUM_MIN_BASE ((unsigned long) 2) |
| + | #define BC_NUM_MAX_IBASE ((unsigned long) 16) |
| + | // larger value might speed up BIGNUM calculations a bit: |
| + | #define BC_NUM_DEF_SIZE (16) |
| + | #define BC_NUM_PRINT_WIDTH (69) |
| - | #define BC_NUM_KARATSUBA_LEN (32) |
| + | #define BC_NUM_KARATSUBA_LEN (32) |
| - | #define BC_NUM_NEG(n, neg) ((((ssize_t)(n)) ^ -((ssize_t)(neg))) + (neg)) |
| - | #define BC_NUM_ONE(n) ((n)->len == 1 && (n)->rdx == 0 && (n)->num[0] == 1) |
| - | #define BC_NUM_INT(n) ((n)->len - (n)->rdx) |
| + | #define BC_NUM_NEG(n, neg) ((((ssize_t)(n)) ^ -((ssize_t)(neg))) + (neg)) |
| + | #define BC_NUM_ONE(n) ((n)->len == 1 && (n)->rdx == 0 && (n)->num[0] == 1) |
| + | #define BC_NUM_INT(n) ((n)->len - (n)->rdx) |
| #define BC_NUM_AREQ(a, b) \ | |
| (BC_MAX((a)->rdx, (b)->rdx) + BC_MAX(BC_NUM_INT(a), BC_NUM_INT(b)) + 1) | |
| #define BC_NUM_MREQ(a, b, scale) \ | |
| @@ -1078,6 +1076,9 @@ static void bc_vec_expand(BcVec *v, size_t req) | |
| } | |
| } | |
| + | #define bc_vec_pop(v) (bc_vec_npop((v), 1)) |
| + | #define bc_vec_top(v) (bc_vec_item_rev((v), 0)) |
| + | |
| static void bc_vec_npop(BcVec *v, size_t n) | |
| { | |
| if (!v->dtor) | |