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signm2signo: do not goto into a branch

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I'm not necessarily against every goto in general, but jumping into a
branch is definitely a bad idea.  Better refactor.
This commit is contained in:
卜部昌平 2020-06-16 15:46:30 +09:00
parent 7cf4625690
commit 224e9c3835
Notes: git 2020-06-29 11:06:51 +09:00 
Merged: https://github.com/ruby/ruby/pull/3247
1 changed files with 19 additions and 18 deletions
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27
signal.c
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@ -243,6 +243,20 @@ signm2signo(VALUE *sig_ptr, int negative, int exit, int *prefix_ptr)
prefix += signame_prefix_len;
}
if (len <= (long)prefix) {
goto unsupported;
}
if (prefix_ptr) *prefix_ptr = prefix;
nmlen = len - prefix;
nm += prefix;
if (nmlen > LONGEST_SIGNAME) goto unsupported;
FOREACH_SIGNAL(sigs, !exit) {
if (memcmp(sigs->signm, nm, nmlen) == 0 &&
sigs->signm[nmlen] == '\0') {
return negative ? -sigs->signo : sigs->signo;
}
}
unsupported:
if (prefix == signame_prefix_len) {
prefix = 0;
@ -262,19 +276,6 @@ signm2signo(VALUE *sig_ptr, int negative, int exit, int *prefix_ptr)
prefix, signame_prefix, vsig);
}
if (prefix_ptr) *prefix_ptr = prefix;
nmlen = len - prefix;
nm += prefix;
if (nmlen > LONGEST_SIGNAME) goto unsupported;
FOREACH_SIGNAL(sigs, !exit) {
if (memcmp(sigs->signm, nm, nmlen) == 0 &&
sigs->signm[nmlen] == '\0') {
return negative ? -sigs->signo : sigs->signo;
}
}
goto unsupported;
}
static const char*
signo2signm(int no)
{