static char *next_token(char **str)
{
char *p = *str;
char *start;
skip_spaces(&p);
if (*p == '\0') {
*str = p;
return 0;
}
start = p; // start of the token
for (; (*p != '\0') && (*p != ','); ++p) {
}
if (*p == '\0') {
*str = p; // eos found, str will point to '\0' at exit
} else {
*p = '\0';
*str = p + 1; // ',' found, str will point to the next char (beginning of the next token)
}
--p; // end of current token
rskip_spaces(&p, start);
if (p < start)
p = start; // empty token
else
++p; // the first space character, or '\0'
*p = '\0';
return start;
}
static inline void push_arg(struct arg *args, int *nargs, char *start, char *end)
{
if (*nargs <= MAX_VALID_NARGS) {
rskip_spaces(&end, start);
if (end > start) {
args[*nargs] = (struct arg) {start, end};
++*nargs;
}
