3f940c9c7
Denys Vlasenko
2018-12-18
Subject
bc: shrink bc_program_index()
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miscutils/bc.c+11 -4
| @@ -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; | |
| } | |