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Add some comments, optimise out a few strlen()s and

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remove a few extraneous assignments.
This commit is contained in:
Brian Somers 1999-05-27 09:50:10 +00:00
parent d0b3b745ba
commit 4d9c2bb9ae
1 changed files with 23 additions and 16 deletions
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39
usr.sbin/ppp/chat.c
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@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: chat.c,v 1.54 1999/02/12 00:52:29 brian Exp $
* $Id: chat.c,v 1.55 1999/05/08 11:06:18 brian Exp $
*/
#include <sys/param.h>
@ -213,6 +213,10 @@ chat_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
/* We leave room for a potential HDLC header in the target string */
ExpandString(c, c->argptr, c->exp + 2, sizeof c->exp - 2, needcr);
/*
* Now read our string. If it's not a special string, we unset
* ``special'' to break out of the loop.
*/
if (gotabort) {
if (c->abort.num < MAXABORTS) {
int len, i;
@ -490,6 +494,10 @@ chat_Write(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
}
if (physical_IsSync(c->physical)) {
/*
* XXX: Fix me
* This data should be stuffed down through the link layers
*/
/* There's always room for the HDLC header */
c->argptr -= 2;
c->arglen += 2;
@ -579,29 +587,25 @@ chat_Destroy(struct chat *c)
* \U Auth User
*/
static char *
ExpandString(struct chat *c, const char *str, char *result, int reslen,
int sendmode)
ExpandString(struct chat *c, const char *str, char *result, int reslen, int cr)
{
int addcr = 0;
int len;
result[--reslen] = '\0';
if (sendmode)
addcr = 1;
while (*str && reslen > 0) {
switch (*str) {
case '\\':
str++;
switch (*str) {
case 'c':
if (sendmode)
addcr = 0;
cr = 0;
break;
case 'd': /* Delay 2 seconds */
chat_Pause(c, 2 * SECTICKS);
break;
case 'p':
chat_Pause(c, SECTICKS / 4);
break; /* Pause 0.25 sec */
break; /* Delay 0.25 seconds */
case 'n':
*result++ = '\n';
reslen--;
@ -620,20 +624,23 @@ ExpandString(struct chat *c, const char *str, char *result, int reslen,
break;
case 'P':
strncpy(result, c->physical->dl->bundle->cfg.auth.key, reslen);
reslen -= strlen(result);
result += strlen(result);
len = strlen(result);
reslen -= len;
result += len;
break;
case 'T':
if (c->phone) {
strncpy(result, c->phone, reslen);
reslen -= strlen(result);
result += strlen(result);
len = strlen(result);
reslen -= len;
result += len;
}
break;
case 'U':
strncpy(result, c->physical->dl->bundle->cfg.auth.name, reslen);
reslen -= strlen(result);
result += strlen(result);
len = strlen(result);
reslen -= len;
result += len;
break;
default:
reslen--;
@ -657,7 +664,7 @@ ExpandString(struct chat *c, const char *str, char *result, int reslen,
}
}
if (--reslen > 0) {
if (addcr)
if (cr)
*result++ = '\r';
}
if (--reslen > 0)