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| author | Denys Vlasenko <vda.linux@googlemail.com> | 2018-12-22 21:52:30 +0100 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2018-12-22 21:52:30 +0100 |
| commit | a9f59db809d45847779b9c631d663a25b6115d7d (patch) | |
| tree | 5d1492f5874e9901c38a57270681f35c2c1c854a /miscutils/bc.c | |
| parent | 2ea8ddf8c245dd160eacf35409572c28345506f7 (diff) | |
| download | busybox-a9f59db809d45847779b9c631d663a25b6115d7d.tar.gz | |
bc: avoid having to twiddle b->neg in zbc_num_p()
function old new delta
zbc_num_ulong_abs - 70 +70
zbc_num_p 424 413 -11
zbc_num_ulong 81 21 -60
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 0/2 up/down: 70/-71) Total: -1 bytes
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils/bc.c')
| -rw-r--r-- | miscutils/bc.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index d7595ce8e..ae5105b01 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -1439,13 +1439,11 @@ static void bc_num_copy(BcNum *d, BcNum *s) } } -static BC_STATUS zbc_num_ulong(BcNum *n, unsigned long *result_p) +static BC_STATUS zbc_num_ulong_abs(BcNum *n, unsigned long *result_p) { size_t i; unsigned long result; - if (n->neg) RETURN_STATUS(bc_error("negative number")); - result = 0; i = n->len; while (i > n->rdx) { @@ -1462,6 +1460,14 @@ static BC_STATUS zbc_num_ulong(BcNum *n, unsigned long *result_p) RETURN_STATUS(BC_STATUS_SUCCESS); } +#define zbc_num_ulong_abs(...) (zbc_num_ulong_abs(__VA_ARGS__) COMMA_SUCCESS) + +static BC_STATUS zbc_num_ulong(BcNum *n, unsigned long *result_p) +{ + if (n->neg) RETURN_STATUS(bc_error("negative number")); + + RETURN_STATUS(zbc_num_ulong_abs(n, result_p)); +} #define zbc_num_ulong(...) (zbc_num_ulong(__VA_ARGS__) COMMA_SUCCESS) #if ULONG_MAX == 0xffffffffUL // 10 digits: 4294967295 @@ -2109,9 +2115,7 @@ static FAST_FUNC BC_STATUS zbc_num_p(BcNum *a, BcNum *b, BcNum *restrict c, size } neg = b->neg; - b->neg = false; - s = zbc_num_ulong(b, &pow); - b->neg = neg; + s = zbc_num_ulong_abs(b, &pow); if (s) RETURN_STATUS(s); // b is not used beyond this point @@ -6150,7 +6154,6 @@ static BC_STATUS zdc_program_asciify(void) char *str; char c; size_t idx; - unsigned long val; if (!STACK_HAS_MORE_THAN(&G.prog.results, 0)) RETURN_STATUS(bc_error_stack_has_too_few_elements()); @@ -6160,6 +6163,7 @@ static BC_STATUS zdc_program_asciify(void) if (s) RETURN_STATUS(s); if (BC_PROG_NUM(r, num)) { + unsigned long val; BcNum strmb; BcDig strmb_digs[ULONG_NUM_BUFSIZE]; |