- for (i = 0; i < padding; ++i) {
- ffi_type *pad = malloc(sizeof(*pad));
-
- memcpy(pad, &ffi_type_schar, sizeof(*pad));
- *els++ = pad;
- }
-
- return padding;
-}
-
-struct psi_ffi_struct_element_storage {
- ffi_type **els;
- size_t nels;
- size_t argc;
- size_t offset;
- size_t max_align;
- size_t last_arg_pos;
-};
-
-static inline void psi_ffi_struct_type_element(
- struct psi_ffi_struct_element_storage *s, struct psi_decl_arg *darg) {
-
- ffi_type *type, **tmp;
- size_t padding;
-
- if (darg->layout->pos == s->last_arg_pos) {
- /* skip bit fields */
- return;
- }
- s->last_arg_pos = darg->layout->pos;
-
- type = malloc(sizeof(*type));
- *type = *psi_ffi_decl_arg_type(darg, NULL);
-
- if (type->alignment > s->max_align) {
- s->max_align = type->alignment;
- }
-
- assert(type->size <= darg->layout->len);
- if ((padding = psi_offset_padding(darg->layout->pos - s->offset, type->alignment))) {
- if (s->nels + padding + 1 > s->argc) {
- s->argc += padding;
- tmp = realloc(s->els, (s->argc + 1) * sizeof(*s->els));
- if (tmp) {
- s->els = tmp;
- } else {
- free(s->els);
- abort();
- }
- s->els[s->argc] = NULL;
- }
- psi_ffi_struct_type_pad(&s->els[s->nels], padding);
- s->nels += padding;
- s->offset += padding;
- }
- assert(s->offset == darg->layout->pos);
-
- s->offset = (s->offset + darg->layout->len + type->alignment - 1) & ~(type->alignment - 1);
- s->els[s->nels++] = type;
-}
-
-static ffi_type **psi_ffi_struct_type_elements(struct psi_decl_struct *strct) {
- size_t i = 0;
- ffi_type **tmp;
- struct psi_decl_arg *darg;
- struct psi_ffi_struct_element_storage s = {0};
-
- s.last_arg_pos = -1;
- s.argc = psi_plist_count(strct->args);
- s.els = calloc(s.argc + 1, sizeof(*s.els));
-
- while (psi_plist_get(strct->args, i++, &darg)) {
- psi_ffi_struct_type_element(&s, darg);
- }
-
- /* apply struct alignment padding */
- s.offset = (s.offset + s.max_align - 1) & ~(s.max_align - 1);
-
- assert(s.offset <= strct->size);
- if (s.offset < strct->size) { /* WTF? */
- size_t padding = strct->size - s.offset;
-
- tmp = realloc(s.els, (padding + s.argc + 1) * sizeof(*s.els));
- if (tmp) {
- s.els = tmp;
- } else {
- free(s.els);
- return NULL;
- }
- psi_ffi_struct_type_pad(&s.els[s.nels], padding);
- s.els[s.argc + padding] = NULL;
- }
-
- return s.els;
-}
-
-static inline ffi_type *psi_ffi_decl_type(struct psi_decl_type *type) {
- struct psi_decl_type *real = psi_decl_type_get_real(type);
-
- if (real != type && type->real.def->var->pointer_level) {
- return &ffi_type_pointer;
- }
-
- switch (real->type) {
- case PSI_T_STRUCT:
- if (!real->real.strct->engine.type) {
- ffi_type *strct = calloc(1, sizeof(ffi_type));
-
- strct->type = FFI_TYPE_STRUCT;
- strct->size = 0;
- strct->elements = psi_ffi_struct_type_elements(real->real.strct);
-
- real->real.strct->engine.type = strct;
- real->real.strct->engine.dtor = psi_ffi_type_dtor;
- }
-
- return real->real.strct->engine.type;
-
- case PSI_T_UNION:
- {
- struct psi_decl_arg *arg;
- psi_plist_get(real->real.unn->args, 0, &arg);
- return psi_ffi_decl_arg_type(arg, NULL);
- }
-
- default:
- break;
- }
-
- return psi_ffi_token_type(real->type);
-}
-
-static inline ffi_type *psi_ffi_decl_func_array_type(struct psi_decl *fn) {
- struct psi_ffi_decl_info *info = fn->info;
- struct psi_ffi_struct_element_storage s = {0};
- struct psi_layout l;
- size_t i;
-
- s.last_arg_pos = -1;
- s.argc = fn->func->var->array_size;
- s.els = calloc(s.argc + 1, sizeof(*s.els));
-
- assert(!fn->func->layout);
- l.pos = 0;
- l.len = psi_decl_arg_get_size(fn->func);
-
- fn->func->layout = &l;
- psi_ffi_struct_type_element(&s, fn->func);
- fn->func->layout = NULL;
-
- info->rv_array = calloc(1, sizeof(ffi_type));
- info->rv_array->type = FFI_TYPE_STRUCT;
- info->rv_array->size = 0;
- info->rv_array->elements = s.els;
-
- return info->rv_array;
-}
-
-static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg,
- struct psi_decl *fn) {
- if (darg->var->pointer_level) {
- if (darg->var->array_size && fn) {
- /* mimic a struct resembling the array return type of fn */
- return psi_ffi_decl_func_array_type(fn);
- }
- return &ffi_type_pointer;
- } else {
- return psi_ffi_decl_type(darg->type);
- }