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39871: cut down number of strlen()s in getstrvalue()

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This commit is contained in:
Sebastian Gniazdowski 2016-11-08 05:37:53 -08:00 • committed by Peter Stephenson
parent a57977d01a
commit 06e4ec853a
3 changed files with 32 additions and 6 deletions
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8
ChangeLog
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@ -1,3 +1,7 @@
2016-11-08 Peter Stephenson <p.stephenson@samsung.com>
* Sebastian: 39871: cut down number of strlen()s in getstrvalue().
2016-11-08 Jun-ichi Takimoto <takimoto-j@kba.biglobe.ne.jp>
* 39857: Completion/Unix/Command/_top: add support for darwin,
@ -5,8 +9,8 @@
2016-11-08 Peter Stephenson <p.stephenson@samsung.com>
* Src/builtin.c, Test/C03traps.ztst: ensure exit trap can always
run.
* 39870: Src/builtin.c, Test/C03traps.ztst: ensure exit trap can
always run.
* unposted: Src/utils.c: follow up to 39867: don't need test
against zero any more.

17
Src/params.c
View file

@ -2060,6 +2060,7 @@ getstrvalue(Value v)
{
char *s, **ss;
char buf[BDIGBUFSIZE];
int len = -1;
if (!v)
return hcalloc(1);
@ -2237,22 +2238,30 @@ getstrvalue(Value v)
return s;
if (v->start < 0) {
v->start += strlen(s);
len = strlen(s);
v->start += len;
if (v->start < 0)
v->start = 0;
}
if (v->end < 0) {
v->end += strlen(s);
if (len < 0)
len = strlen(s);
v->end += len;
if (v->end >= 0) {
char *eptr = s + v->end;
if (*eptr)
v->end += MB_METACHARLEN(eptr);
}
}
s = (v->start > (int)strlen(s)) ? dupstring("") : dupstring(s + v->start);
if (len < 0)
len = strlen(s);
s = (v->start > len) ? dupstring("") :
dupstring_wlen(s + v->start, len - v->start);
if (v->end <= v->start)
s[0] = '\0';
else if (v->end - v->start <= (int)strlen(s))
else if (v->end - v->start <= len - v->start)
s[v->end - v->start] = '\0';
return s;

13
Src/string.c
View file

@ -41,6 +41,19 @@ dupstring(const char *s)
return t;
}
/**/
mod_export char *
dupstring_wlen(const char *s, unsigned len)
{
char *t;
if (!s)
return NULL;
t = (char *) zhalloc(len + 1);
strcpy(t, s);
return t;
}
/**/
mod_export char *
ztrdup(const char *s)