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author | Denys Vlasenko | 2018-12-18 15:49:42 +0100 |
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committer | Denys Vlasenko | 2018-12-18 15:49:42 +0100 |
commit | 3f940c9c707904df545c148065f720d33e805aed (patch) | |
tree | af6e53ef36b07137014b59c36eceed171f98ed4a /miscutils | |
parent | 55f3cab7e9f61c1e9fc342f2d245d6b055a08b84 (diff) | |
download | busybox-3f940c9c707904df545c148065f720d33e805aed.zip busybox-3f940c9c707904df545c148065f720d33e805aed.tar.gz |
bc: shrink bc_program_index()
function old new delta
bc_program_index 66 47 -19
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(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-19) Total: -19 bytes
text data bss dec hex filename
981418 485 7296 989199 f180f busybox_old
981399 485 7296 989180 f17fc busybox_unstripped
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
-rw-r--r-- | miscutils/bc.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c index eaa28a9..2da7c31 100644 --- a/miscutils/bc.c +++ b/miscutils/bc.c @@ -5256,11 +5256,18 @@ exec_err: static size_t bc_program_index(char *code, size_t *bgn) { - char amt = code[(*bgn)++], i = 0; - size_t res = 0; + unsigned char *bytes = (void*)(code + *bgn); + unsigned amt; + unsigned i; + size_t res; + + amt = *bytes++; + *bgn += amt + 1; - for (; i < amt; ++i, ++(*bgn)) - res |= (((size_t)((int) code[*bgn]) & UCHAR_MAX) << (i * CHAR_BIT)); + amt *= 8; + res = 0; + for (i = 0; i < amt; i += 8) + res |= (size_t)(*bytes++) << i; return res; } |