7dc0a5128
Denys Vlasenko
2018-12-13
Subject
bc: further zbc_vm_stdin() optimizations
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miscutils/bc.c+7 -10
| @@ -7072,11 +7072,9 @@ static BC_STATUS zbc_vm_stdin(void) | |
| else if (buf.v[0] == G.sbgn) | |
| str += 1; | |
| } else { | |
| - | size_t i; |
| - | for (i = 0; i < len; ++i) { |
| - | char c = string[i]; |
| - | |
| - | if (i - 1 > len || string[i - 1] != '\\') { |
| + | while (*string) { |
| + | char c = *string; |
| + | if (string != buf.v && string[-1] != '\\') { |
| // checking applet type is cheaper than accessing sbgn/send | |
| if (IS_DC) // dc: sbgn = send = '"' | |
| str ^= (c == '"'); | |
| @@ -7087,16 +7085,15 @@ static BC_STATUS zbc_vm_stdin(void) | |
| str += 1; | |
| } | |
| } | |
| - | |
| - | if (c == '/' && !comment && string[i + 1] == '*') { |
| + | string++; |
| + | if (c == '/' && *string == '*') { |
| comment = true; | |
| break; | |
| } | |
| - | else if (c == '*' && comment && string[i + 1] == '/') |
| + | if (c == '*' && *string == '/') |
| comment = false; | |
| } | |
| - | |
| - | if (str || comment || string[len - 2] == '\\') { |
| + | if (str || comment || string[-2] == '\\') { |
| bc_vec_concat(&buffer, buf.v); | |
| continue; | |
| } | |