static bool upb_isident(const char *str, size_t len, bool full, upb_status *s) {
bool start = true;
for (size_t i = 0; i < len; i++) {
char c = str[i];
if (c == '.') {
if (start || !full) {
upb_status_seterrf(s, "invalid name: unexpected '.' (%s)", str);
return false;
}
start = true;
} else if (start) {
if (!upb_isletter(c)) {
upb_status_seterrf(
s, "invalid name: path components must start with a letter (%s)",
str);
return false;
}
start = false;
} else {
if (!upb_isalphanum(c)) {
upb_status_seterrf(s, "invalid name: non-alphanumeric character (%s)",
str);
return false;
}
}
}
return !start;
}
static bool upb_isident(const char *str, size_t len, bool full) {
bool start = true;
for (size_t i = 0; i < len; i++) {
char c = str[i];
if (c == '.') {
if (start || !full) return false;
start = true;
} else if (start) {
if (!upb_isletter(c)) return false;
start = false;
} else {
if (!upb_isalphanum(c)) return false;
}
}
return !start;
}
static bool upb_isalphanum(char c) {
return upb_isletter(c) || upb_isbetween(c, '0', '9');
}
