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bc: further zbc_vm_stdin() optimizations

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function                                             old     new   delta
bc_vm_run                                            534     514     -20

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-12-13 17:36:41 +01:00
parent 40534bb6e2
commit 7dc0a51286
1 changed files with 7 additions and 10 deletions
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17
miscutils/bc.c
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@ -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;
}