void
get_list(char *list)
{
size_t setautostart, start, stop;
char *pos;
char *p;
/*
* set a byte in the positions array to indicate if a field or
* column is to be selected; use +1, it's 1-based, not 0-based.
* This parser is less restrictive than the Draft 9 POSIX spec.
* POSIX doesn't allow lists that aren't in increasing order or
* overlapping lists. We also handle "-3-5" although there's no
* real reason too.
*/
for (; (p = strsep(&list, ", \t")) != NULL;) {
setautostart = start = stop = 0;
if (*p == '-') {
++p;
setautostart = 1;
}
if (isdigit((unsigned char)*p)) {
start = stop = strtol(p, &p, 10);
if (setautostart && start > autostart)
autostart = start;
}
if (*p == '-') {
if (isdigit((unsigned char)p[1]))
stop = strtol(p + 1, &p, 10);
if (*p == '-') {
++p;
if (!autostop || autostop > stop)
autostop = stop;
}
}
if (*p)
errx(1, "[-cf] list: illegal list value");
if (!stop || !start)
errx(1, "[-cf] list: values may not include zero");
if (maxval < stop) {
maxval = stop;
needpos(maxval + 1);
}
for (pos = positions + start; start++ <= stop; *pos++ = 1);
}
/* overlapping ranges */
if (autostop && maxval > autostop) {
maxval = autostop;
needpos(maxval + 1);
}
/* set autostart */
if (autostart)
memset(positions + 1, '1', autostart);
}
static void
get_list(char *list)
{
size_t setautostart, start, stop;
char *pos;
char *p;
/*
* set a byte in the positions array to indicate if a field or
* column is to be selected; use +1, it's 1-based, not 0-based.
* Numbers and number ranges may be overlapping, repeated, and in
* any order. We handle "-3-5" although there's no real reason to.
*/
for (; (p = strsep(&list, ", \t")) != NULL;) {
setautostart = start = stop = 0;
if (*p == '-') {
++p;
setautostart = 1;
}
if (isdigit((unsigned char)*p)) {
start = stop = strtol(p, &p, 10);
if (setautostart && start > autostart)
autostart = start;
}
if (*p == '-') {
if (isdigit((unsigned char)p[1]))
stop = strtol(p + 1, &p, 10);
if (*p == '-') {
++p;
if (!autostop || autostop > stop)
autostop = stop;
}
}
if (*p)
errx(1, "[-bcf] list: illegal list value");
if (!stop || !start)
errx(1, "[-bcf] list: values may not include zero");
if (maxval < stop) {
maxval = stop;
needpos(maxval + 1);
}
for (pos = positions + start; start++ <= stop; *pos++ = 1);
}
/* overlapping ranges */
if (autostop && maxval > autostop) {
maxval = autostop;
needpos(maxval + 1);
}
/* set autostart */
if (autostart)
memset(positions + 1, '1', autostart);
}
