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pretty_mask(): Use explicit lengths instead of temporarily writing '\0'.

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This is slightly simpler and should fix Coverity warnings.
This commit is contained in:
Jilles Tjoelker 2014-10-10 23:05:41 +02:00
parent 7db54a1f97
commit f4e893b515
1 changed files with 26 additions and 37 deletions
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63
src/chmode.c
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@ -374,18 +374,17 @@ pretty_mask(const char *idmask)
{
static char mask_buf[BUFSIZE];
int old_mask_pos;
char *nick, *user, *host, *forward = NULL;
char splat[] = "*";
const char *nick, *user, *host, *forward = NULL;
char *t, *at, *ex, *ex2;
char ne = 0, ue = 0, he = 0, fe = 0; /* save values at nick[NICKLEN], et all */
char e2 = 0; /* save value that delimits forward channel */
int nl, ul, hl, fl;
char e2 = 0;
char *mask;
mask = LOCAL_COPY(idmask);
mask = check_string(mask);
collapse(mask);
nick = user = host = splat;
nick = user = host = "*";
if((size_t) BUFSIZE - mask_pos < strlen(mask) + 5)
return NULL;
@ -457,31 +456,29 @@ pretty_mask(const char *idmask)
}
/* truncate values to max lengths */
if(strlen(nick) > NICKLEN - 1)
{
ne = nick[NICKLEN - 1];
nick[NICKLEN - 1] = '\0';
}
if(strlen(user) > USERLEN)
{
ue = user[USERLEN];
user[USERLEN] = '\0';
}
if(strlen(host) > HOSTLEN)
{
he = host[HOSTLEN];
host[HOSTLEN] = '\0';
}
if(forward && strlen(forward) > CHANNELLEN)
{
fe = forward[CHANNELLEN];
forward[CHANNELLEN] = '\0';
}
nl = strlen(nick);
if(nl > NICKLEN - 1)
nl = NICKLEN - 1;
ul = strlen(user);
if(ul > USERLEN)
ul = USERLEN;
hl = strlen(host);
if(hl > HOSTLEN)
hl = HOSTLEN;
fl = forward ? strlen(forward) : 0;
if(fl > CHANNELLEN)
fl = CHANNELLEN;
if (forward)
mask_pos += rb_sprintf(mask_buf + mask_pos, "%s!%s@%s$%s", nick, user, host, forward) + 1;
else
mask_pos += rb_sprintf(mask_buf + mask_pos, "%s!%s@%s", nick, user, host) + 1;
memcpy(mask_buf + mask_pos, nick, nl), mask_pos += nl;
mask_buf[mask_pos++] = '!';
memcpy(mask_buf + mask_pos, user, ul), mask_pos += ul;
mask_buf[mask_pos++] = '@';
memcpy(mask_buf + mask_pos, host, hl), mask_pos += hl;
if (forward) {
mask_buf[mask_pos++] = '$';
memcpy(mask_buf + mask_pos, forward, fl), mask_pos += fl;
}
mask_buf[mask_pos++] = '\0';
/* restore mask, since we may need to use it again later */
if(at)
@ -490,14 +487,6 @@ pretty_mask(const char *idmask)
*ex = '!';
if(ex2)
*ex2 = e2;
if(ne)
nick[NICKLEN - 1] = ne;
if(ue)
user[USERLEN] = ue;
if(he)
host[HOSTLEN] = he;
if(fe)
forward[CHANNELLEN] = fe;
return mask_buf + old_mask_pos;
}