-bool is_space(char c) {
- return (c == ' ') || (c == '\t');
-}
-
-bool is_number(char c) {
- return ('0' <= c) && (c <= '9');
-}
-
-bool is_alpha(char c) {
- return (c == '_') || (('a' <= c) && (c <= 'z')) || (('A' <= c) && (c <= 'Z'));
-}
-
-bool is_alpha_num(c) {
- return is_number(c) || is_alpha(c);
-}
-
-size_t DLList_equation_print(DLList* l, FILE* fp) {
- size_t cant = 0;
- Equation* eq;
- for (eq = DLList_begin(l); DLList_have_more(l); eq = DLList_next(l)) {
- cant += Equation_print(eq, fp);
- }
- return cant;
-}