+ struct psi_func_redir *redir;
+
+ if (!strcmp(func->var->name, "dlsym")) {
+ data->error(func->token, PSI_WARNING, "Cannot dlsym dlsym (sic!)");
+ return 0;
+ }
+
+ if (!validate_decl_arg(data, func)) {
+ return 0;
+ }
+ for (redir = &psi_func_redirs[0]; redir->name; ++redir) {
+ if (!strcmp(func->var->name, redir->name)) {
+ decl->call.sym = redir->func;
+ }
+ }
+ if (!decl->call.sym) {
+#ifndef RTLD_NEXT
+# define RTLD_NEXT ((void *) -1l)
+#endif
+ decl->call.sym = dlsym(dl ?: RTLD_NEXT, func->var->name);
+ if (!decl->call.sym) {
+ data->error(func->token, PSI_WARNING,
+ "Failed to locate symbol '%s': %s",
+ func->var->name, dlerror());
+ }
+ }
+ return 1;
+}
+
+static inline int validate_decl(PSI_Data *data, void *dl, decl *decl) {
+ if (!validate_decl_abi(data, decl->abi)) {
+ data->error(decl->abi->token, PSI_WARNING,
+ "Invalid calling convention: '%s'", decl->abi->token->text);
+ return 0;
+ }
+ if (!validate_decl_func(data, dl, decl, decl->func)) {
+ return 0;
+ }
+ if (decl->args) {
+ size_t i;
+
+ for (i = 0; i < decl->args->count; ++i) {
+ if (!validate_decl_arg(data, decl->args->args[i])) {
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+static inline decl_arg *locate_decl_var_arg(decl_var *var, decl_args *args, decl_arg *func) {
+ size_t i;
+
+ for (i = 0; i < args->count; ++i) {
+ decl_arg *arg = args->args[i];
+
+ if (!strcmp(var->name, arg->var->name)) {
+ ZEND_ASSERT(!var->arg || var->arg == arg);
+ return var->arg = arg;
+ }
+ }
+ if (func && !strcmp(var->name, func->var->name)) {
+ return var->arg = func;
+ }
+
+ return NULL;
+}
+static inline decl_arg *locate_struct_member(decl_struct *s, decl_var *var) {
+ if (s->args) {
+ return locate_decl_var_arg(var, s->args, NULL);
+ }
+
+ return NULL;
+}
+static inline constant *locate_num_exp_constant(num_exp *exp, constants *consts) {
+ size_t i;
+
+ for (i = 0; i < consts->count; ++i) {
+ constant *cnst = consts->list[i];
+
+ if (!strcmp(cnst->name, exp->u.numb)) {
+ free(exp->u.numb);
+ return exp->u.cnst = cnst;
+ }
+ }
+
+ return NULL;
+}
+static inline int validate_num_exp(PSI_Data *data, decl_args *dargs, decl_arg *func, num_exp *exp) {
+ if (exp->operand) {
+ switch (exp->operator) {
+ case PSI_T_PLUS:
+ exp->calculator = psi_calc_add;
+ break;
+ case PSI_T_MINUS:
+ exp->calculator = psi_calc_sub;
+ break;
+ case PSI_T_ASTERISK:
+ exp->calculator = psi_calc_mul;
+ break;
+ case PSI_T_SLASH:
+ exp->calculator = psi_calc_div;
+ break;
+ EMPTY_SWITCH_DEFAULT_CASE();
+ }
+ if (!validate_num_exp(data, dargs, func, exp->operand)) {
+ return 0;
+ }
+ }
+ switch (exp->t) {
+ case PSI_T_NAME:
+ if (!locate_decl_var_arg(exp->u.dvar, dargs, func)) {
+ data->error(exp->token, PSI_WARNING, "Unknown variable '%s' in numeric expression",
+ exp->u.dvar->name);
+ return 0;
+ }
+ return 1;
+ case PSI_T_NSNAME:
+ if (!locate_num_exp_constant(exp, data->consts)) {
+ data->error(exp->token, PSI_WARNING, "Unknown constant '%s' in numeric expression",
+ exp->u.numb);
+ return 0;
+ }
+ return 1;
+ case PSI_T_NUMBER:
+ return 1;
+ default:
+ return 0;
+ }
+}
+static inline int validate_set_value_handler(set_value *set) {
+ switch (set->func->type) {
+ case PSI_T_TO_BOOL:
+ set->func->handler = psi_to_bool;
+ break;
+ case PSI_T_TO_INT:
+ set->func->handler = psi_to_int;
+ break;
+ case PSI_T_TO_FLOAT:
+ set->func->handler = psi_to_double;
+ break;
+ case PSI_T_TO_STRING:
+ set->func->handler = psi_to_string;
+ break;
+ case PSI_T_TO_ARRAY:
+ set->func->handler = psi_to_array;
+ break;
+ case PSI_T_TO_OBJECT:
+ set->func->handler = psi_to_object;
+ break;
+ case PSI_T_VOID:
+ set->func->handler = psi_to_void;
+ break;
+ case PSI_T_ELLIPSIS:
+ if (set->outer.set && set->outer.set->func->type == PSI_T_TO_ARRAY) {
+ set->func->handler = psi_to_recursive;
+ set->inner = set->outer.set->inner;
+ set->count = set->outer.set->count;
+ break;
+ }
+ /* no break */
+ default:
+ return 0;
+ }
+ return 1;
+}
+static inline void decl_var_arg_v(decl_args *args, va_list argp) {
+ int argc;
+ decl_arg **argv;
+
+ memset(args, 0, sizeof(*args));
+
+ while ((argc = va_arg(argp, int))) {
+ argv = va_arg(argp, decl_arg **);
+ while (argc--) {
+ add_decl_arg(args, *argv++);
+ }
+ }
+}
+static inline int validate_set_value_ex(PSI_Data *data, set_value *set, decl_arg *ref, decl_args *ref_list) {
+ size_t i;
+ decl_type *ref_type;
+ decl_var *set_var = set->vars->vars[0];
+
+ if (!validate_set_value_handler(set)) {
+ data->error(set->func->token, PSI_WARNING, "Invalid cast '%s' in `set` statement", set->func->name);
+ return 0;
+ }
+
+ for (i = 0; i < set->vars->count; ++i) {
+ decl_var *svar = set->vars->vars[i];
+ if (!svar->arg && !locate_decl_var_arg(svar, ref_list, NULL)) {
+ data->error(svar->token, PSI_WARNING, "Unknown variable '%s' in `set` statement", svar->name);
+ return 0;
+ }
+ }
+
+ if (!ref) {
+ ref = set_var->arg;
+ }
+ ref_type = real_decl_type(ref->type);
+
+ if (set->count) {
+ int is_to_array = (set->func->type == PSI_T_TO_ARRAY);
+ int is_pointer_to_struct = (ref_type->type == PSI_T_STRUCT && ref->var->pointer_level);
+
+ if (!is_to_array && !is_pointer_to_struct) {
+ data->error(set->func->token, E_WARNING, "Inner `set` statement casts only work with "
+ "to_array() casts on structs or pointers: %s(%s...", set->func->name, set->vars->vars[0]->name);
+ return 0;
+ }
+ }
+ if (set->num) {
+ if (!validate_num_exp(data, ref_list, ref, set->num)) {
+ return 0;
+ }
+ }
+
+ if (ref_type->type == PSI_T_STRUCT) {
+ /* to_array(struct, to_...) */
+ if (!set->outer.set || set->outer.set->inner != set->inner) {
+ for (i = 0; i < set->count; ++i) {
+ decl_var *sub_var = set->inner[i]->vars->vars[0];
+ decl_arg *sub_ref = locate_struct_member(ref_type->strct, sub_var);
+
+ if (sub_ref) {
+ if (!validate_set_value_ex(data, set->inner[i], sub_ref, ref_type->strct->args)) {
+ return 0;
+ }
+ }
+ }
+ }
+ } else if (set->count == 1) {
+ /* to_array(ptr, to_string(*ptr)) */
+ decl_var *sub_var = set->inner[0]->vars->vars[0];
+ decl_arg *sub_ref = locate_decl_var_arg(sub_var, ref_list, ref);
+
+ if (sub_ref) {
+ if (strcmp(sub_var->name, set_var->name)) {
+ data->error(sub_var->token, E_WARNING, "Inner `set` statement casts on pointers must reference the same variable");
+ return 0;
+ }
+ if (!validate_set_value_ex(data, set->inner[0], sub_ref, ref_list)) {
+ return 0;
+ }
+ }
+ } else if (set->count > 1) {
+ data->error(set->func->token, E_WARNING, "Inner `set` statement casts on pointers may only occur once");
+ return 0;
+ }
+
+ return 1;
+}
+static inline int validate_set_value(PSI_Data *data, set_value *set, ...) {
+ va_list argp;
+ decl_args args = {0};
+ int check;
+
+ va_start(argp, set);
+ decl_var_arg_v(&args, argp);
+ va_end(argp);
+
+ check = validate_set_value_ex(data, set, NULL, &args);
+ if (args.args) {
+ free(args.args);
+ }
+ return check;
+}
+static inline decl *locate_impl_decl(decls *decls, return_stmt *ret) {
+ if (decls) {
+ size_t i;
+
+ for (i = 0; i < decls->count; ++i) {
+ if (!strcmp(decls->list[i]->func->var->name, ret->set->vars->vars[0]->name)) {
+ ret->decl = decls->list[i]->func;
+ return decls->list[i];
+ }
+ }
+ }
+
+ return NULL;
+}
+static inline int validate_impl_ret_stmt(PSI_Data *data, impl *impl) {
+ return_stmt *ret;
+
+ /* we must have exactly one ret stmt delcaring the native func to call */
+ /* and which type cast to apply */
+ if (impl->stmts->ret.count != 1) {
+ if (impl->stmts->ret.count > 1) {
+ data->error(impl->stmts->ret.list[1]->token, PSI_WARNING,
+ "Too many `return` statements for implmentation %s;"
+ " found %zu, exactly one is needed",
+ impl->func->name, impl->stmts->ret.count);
+ } else {
+ data->error(impl->func->token, PSI_WARNING,
+ "Missing `return` statement for implementation %s",
+ impl->func->name);
+ }
+ return 0;
+ }
+
+ ret = impl->stmts->ret.list[0];
+
+ if (!(impl->decl = locate_impl_decl(data->decls, ret))) {
+ data->error(ret->token, PSI_WARNING,
+ "Missing declaration '%s' for `return` statment for implementation %s",
+ ret->set->vars->vars[0]->name, impl->func->name);
+ return 0;
+ }
+
+ if (!validate_set_value(data, ret->set, 1, &ret->decl, impl->decl->args ? (int) impl->decl->args->count : 0, impl->decl->args ? impl->decl->args->args : NULL, 0)) {
+ return 0;
+ }
+
+ impl->decl->impl = impl;
+
+ return 1;
+}
+
+static inline int validate_impl_let_stmts(PSI_Data *data, impl *impl) {