free(d->child);
free(d);
- return 1;
+ return 0;
}
/*
return -1;
}
- return 1;
+ return 0;
}
return 0;
* depth-first preorder traversal. The function is given a pointer to the
* declarator as well as to the pointer which was used to reach that
* declarator: this can be used to rewrite entire subtrees.
+ *
+ * The called function may return a negative value to indicate an error
+ * which terminates traversal.
+ *
+ * Returns 0 on success, or a negative value on failure.
*/
-static bool forall_declarators(struct cdecl *decl,
+static int forall_declarators(struct cdecl *decl,
int f(struct cdecl_declarator **, struct cdecl_declarator *))
{
struct cdecl_declarator *d, **p;
- for (p = &decl->declarators, d = *p; d; p = &d->child, d = *p) {
- switch (f(p, d)) {
- case 0:
- break;
- case 1:
- d = *p;
- break;
- case -1:
- return false;
- default:
- assert(0);
- }
+ for (p = &decl->declarators; *p; p = &d->child) {
+ int rc;
+
+ rc = f(p, *p);
+ if (rc < 0)
+ return rc;
+ d = *p;
if (d->type == CDECL_DECL_FUNCTION) {
struct cdecl *i;
for (i = d->u.function.parameters; i; i = i->next) {
- if (!forall_declarators(i, f))
- return false;
+ rc = forall_declarators(i, f);
+ if (rc < 0)
+ return rc;
}
}
}
- return true;
+ return 0;
}
static struct cdecl *do_parse(const char *str, int english_mode)
for (i = decl; i; i = i->next) {
if (!english_mode) {
- if (!forall_declarators(i, reduce_parentheses))
+ if (forall_declarators(i, reduce_parentheses) < 0)
return 0;
- if (!forall_declarators(i, simplify_functions))
+ if (forall_declarators(i, simplify_functions) < 0)
return 0;
}
- if (!forall_declarators(i, check_parameters))
+ if (forall_declarators(i, check_parameters) < 0)
return 0;
- if (!forall_declarators(i, check_rettypes))
+ if (forall_declarators(i, check_rettypes) < 0)
return 0;
- if (!forall_declarators(i, check_arrays))
+ if (forall_declarators(i, check_arrays) < 0)
return 0;
- if (!forall_declarators(i, normalize_specs))
+ if (forall_declarators(i, normalize_specs) < 0)
return 0;
- if (!forall_declarators(i, check_qualifiers))
+ if (forall_declarators(i, check_qualifiers) < 0)
return 0;
if (!valid_declspecs(i, true))