namespace factor { struct factorvm { // contexts cell ds_size, rs_size; context *unused_contexts; void reset_datastack(); void reset_retainstack(); void fix_stacks(); void save_stacks(); context *alloc_context(); void dealloc_context(context *old_context); void nest_stacks(); void unnest_stacks(); void init_stacks(cell ds_size_, cell rs_size_); bool stack_to_array(cell bottom, cell top); cell array_to_stack(array *array, cell bottom); inline void vmprim_datastack(); inline void vmprim_retainstack(); inline void vmprim_set_datastack(); inline void vmprim_set_retainstack(); inline void vmprim_check_datastack(); // run cell T; /* Canonical T object. It's just a word */ inline void vmprim_getenv(); inline void vmprim_setenv(); inline void vmprim_exit(); inline void vmprim_micros(); inline void vmprim_sleep(); inline void vmprim_set_slot(); inline void vmprim_load_locals(); cell clone_object(cell obj_); inline void vmprim_clone(); // profiler bool profiling_p; void init_profiler(); code_block *compile_profiling_stub(cell word_); void set_profiling(bool profiling); inline void vmprim_profiling(); // errors void out_of_memory(); void fatal_error(const char* msg, cell tagged); void critical_error(const char* msg, cell tagged); void throw_error(cell error, stack_frame *callstack_top); void not_implemented_error(); bool in_page(cell fault, cell area, cell area_size, int offset); void memory_protection_error(cell addr, stack_frame *native_stack); void signal_error(int signal, stack_frame *native_stack); void divide_by_zero_error(); void fp_trap_error(stack_frame *signal_callstack_top); inline void vmprim_call_clear(); inline void vmprim_unimplemented(); void memory_signal_handler_impl(); void misc_signal_handler_impl(); void fp_signal_handler_impl(); void type_error(cell type, cell tagged); void general_error(vm_error_type error, cell arg1, cell arg2, stack_frame *callstack_top); //callstack // bignum int bignum_equal_p(bignum * x, bignum * y); enum bignum_comparison bignum_compare(bignum * x, bignum * y); bignum *bignum_add(bignum * x, bignum * y); bignum *bignum_subtract(bignum * x, bignum * y); bignum *bignum_multiply(bignum * x, bignum * y); void bignum_divide(bignum * numerator, bignum * denominator, bignum * * quotient, bignum * * remainder); bignum *bignum_quotient(bignum * numerator, bignum * denominator); bignum *bignum_remainder(bignum * numerator, bignum * denominator); cell bignum_to_cell(bignum * bignum); fixnum bignum_to_fixnum(bignum * bignum); s64 bignum_to_long_long(bignum * bignum); u64 bignum_to_ulong_long(bignum * bignum); double bignum_to_double(bignum * bignum); bignum *double_to_bignum(double x); int bignum_equal_p_unsigned(bignum * x, bignum * y); enum bignum_comparison bignum_compare_unsigned(bignum * x, bignum * y); bignum *bignum_add_unsigned(bignum * x, bignum * y, int negative_p); bignum *bignum_subtract_unsigned(bignum * x, bignum * y); bignum *bignum_multiply_unsigned(bignum * x, bignum * y, int negative_p); bignum *bignum_multiply_unsigned_small_factor(bignum * x, bignum_digit_type y,int negative_p); void bignum_destructive_add(bignum * bignum, bignum_digit_type n); void bignum_destructive_scale_up(bignum * bignum, bignum_digit_type factor); void bignum_divide_unsigned_large_denominator(bignum * numerator, bignum * denominator, bignum * * quotient, bignum * * remainder, int q_negative_p, int r_negative_p); void bignum_divide_unsigned_normalized(bignum * u, bignum * v, bignum * q); bignum_digit_type bignum_divide_subtract(bignum_digit_type * v_start, bignum_digit_type * v_end, bignum_digit_type guess, bignum_digit_type * u_start); void bignum_divide_unsigned_medium_denominator(bignum * numerator,bignum_digit_type denominator, bignum * * quotient, bignum * * remainder,int q_negative_p, int r_negative_p); void bignum_destructive_normalization(bignum * source, bignum * target, int shift_left); void bignum_destructive_unnormalization(bignum * bignum, int shift_right); bignum_digit_type bignum_digit_divide(bignum_digit_type uh, bignum_digit_type ul, bignum_digit_type v, bignum_digit_type * q) /* return value */; bignum_digit_type bignum_digit_divide_subtract(bignum_digit_type v1, bignum_digit_type v2, bignum_digit_type guess, bignum_digit_type * u); void bignum_divide_unsigned_small_denominator(bignum * numerator, bignum_digit_type denominator, bignum * * quotient, bignum * * remainder,int q_negative_p, int r_negative_p); bignum_digit_type bignum_destructive_scale_down(bignum * bignum, bignum_digit_type denominator); bignum * bignum_remainder_unsigned_small_denominator(bignum * n, bignum_digit_type d, int negative_p); bignum *bignum_digit_to_bignum(bignum_digit_type digit, int negative_p); bignum *allot_bignum(bignum_length_type length, int negative_p); bignum * allot_bignum_zeroed(bignum_length_type length, int negative_p); bignum *bignum_shorten_length(bignum * bignum, bignum_length_type length); bignum *bignum_trim(bignum * bignum); bignum *bignum_new_sign(bignum * x, int negative_p); bignum *bignum_maybe_new_sign(bignum * x, int negative_p); void bignum_destructive_copy(bignum * source, bignum * target); bignum *bignum_bitwise_not(bignum * x); bignum *bignum_arithmetic_shift(bignum * arg1, fixnum n); bignum *bignum_bitwise_and(bignum * arg1, bignum * arg2); bignum *bignum_bitwise_ior(bignum * arg1, bignum * arg2); bignum *bignum_bitwise_xor(bignum * arg1, bignum * arg2); bignum *bignum_magnitude_ash(bignum * arg1, fixnum n); bignum *bignum_pospos_bitwise_op(int op, bignum * arg1, bignum * arg2); bignum *bignum_posneg_bitwise_op(int op, bignum * arg1, bignum * arg2); bignum *bignum_negneg_bitwise_op(int op, bignum * arg1, bignum * arg2); void bignum_negate_magnitude(bignum * arg); bignum *bignum_integer_length(bignum * x); int bignum_logbitp(int shift, bignum * arg); int bignum_unsigned_logbitp(int shift, bignum * bignum); bignum *digit_stream_to_bignum(unsigned int n_digits, unsigned int (*producer)(unsigned int, factorvm *), unsigned int radix, int negative_p); //data_heap bool secure_gc; /* Set by the -securegc command line argument */ bool gc_off; /* GC is off during heap walking */ data_heap *data; /* A heap walk allows useful things to be done, like finding all references to an object for debugging purposes. */ cell heap_scan_ptr; cell init_zone(zone *z, cell size, cell start); void init_card_decks(); data_heap *alloc_data_heap(cell gens, cell young_size,cell aging_size,cell tenured_size); data_heap *grow_data_heap(data_heap *data, cell requested_bytes); void dealloc_data_heap(data_heap *data); void clear_cards(cell from, cell to); void clear_decks(cell from, cell to); void clear_allot_markers(cell from, cell to); void reset_generation(cell i); void reset_generations(cell from, cell to); void set_data_heap(data_heap *data_); void init_data_heap(cell gens,cell young_size,cell aging_size,cell tenured_size,bool secure_gc_); cell untagged_object_size(object *pointer); cell unaligned_object_size(object *pointer); inline void vmprim_size(); cell binary_payload_start(object *pointer); inline void vmprim_data_room(); void begin_scan(); void end_scan(); inline void vmprim_begin_scan(); cell next_object(); inline void vmprim_next_object(); inline void vmprim_end_scan(); template void each_object(T &functor); cell find_all_words(); cell object_size(cell tagged); //write barrier inline card *addr_to_card(cell a); inline cell card_to_addr(card *c); inline cell card_offset(card *c); inline card_deck *addr_to_deck(cell a); inline cell deck_to_addr(card_deck *c); inline card *deck_to_card(card_deck *d); inline card *addr_to_allot_marker(object *a); inline void write_barrier(object *obj); inline void allot_barrier(object *address); //data_gc /* used during garbage collection only */ zone *newspace; bool performing_gc; bool performing_compaction; cell collecting_gen; /* if true, we collecting aging space for the second time, so if it is still full, we go on to collect tenured */ bool collecting_aging_again; /* in case a generation fills up in the middle of a gc, we jump back up to try collecting the next generation. */ jmp_buf gc_jmp; gc_stats stats[max_gen_count]; u64 cards_scanned; u64 decks_scanned; u64 card_scan_time; cell code_heap_scans; /* What generation was being collected when copy_code_heap_roots() was last called? Until the next call to add_code_block(), future collections of younger generations don't have to touch the code heap. */ cell last_code_heap_scan; /* sometimes we grow the heap */ bool growing_data_heap; data_heap *old_data_heap; void init_data_gc(); object *copy_untagged_object_impl(object *pointer, cell size); object *copy_object_impl(object *untagged); bool should_copy_p(object *untagged); object *resolve_forwarding(object *untagged); template T *copy_untagged_object(T *untagged); cell copy_object(cell pointer); void copy_handle(cell *handle); void copy_card(card *ptr, cell gen, cell here); void copy_card_deck(card_deck *deck, cell gen, card mask, card unmask); void copy_gen_cards(cell gen); void copy_cards(); void copy_stack_elements(segment *region, cell top); void copy_registered_locals(); void copy_registered_bignums(); void copy_roots(); cell copy_next_from_nursery(cell scan); cell copy_next_from_aging(cell scan); cell copy_next_from_tenured(cell scan); void copy_reachable_objects(cell scan, cell *end); void begin_gc(cell requested_bytes); void end_gc(cell gc_elapsed); void garbage_collection(cell gen,bool growing_data_heap_,cell requested_bytes); void gc(); inline void vmprim_gc(); inline void vmprim_gc_stats(); void clear_gc_stats(); inline void vmprim_become(); void inline_gc(cell *gc_roots_base, cell gc_roots_size); inline bool collecting_accumulation_gen_p(); inline object *allot_zone(zone *z, cell a); inline object *allot_object(header header, cell size); template TYPE *allot(cell size); inline void check_data_pointer(object *pointer); inline void check_tagged_pointer(cell tagged); inline void vmprim_clear_gc_stats(); // local roots /* If a runtime function needs to call another function which potentially allocates memory, it must wrap any local variable references to Factor objects in gc_root instances */ std::vector gc_locals; std::vector gc_bignums; // generic arrays template T *allot_array_internal(cell capacity); template bool reallot_array_in_place_p(T *array, cell capacity); template TYPE *reallot_array(TYPE *array_, cell capacity); //debug bool fep_disabled; bool full_output; cell look_for; cell obj; void print_chars(string* str); void print_word(word* word, cell nesting); void print_factor_string(string* str); void print_array(array* array, cell nesting); void print_tuple(tuple *tuple, cell nesting); void print_nested_obj(cell obj, fixnum nesting); void print_obj(cell obj); void print_objects(cell *start, cell *end); void print_datastack(); void print_retainstack(); void print_stack_frame(stack_frame *frame); void print_callstack(); void dump_cell(cell x); void dump_memory(cell from, cell to); void dump_zone(zone *z); void dump_generations(); void dump_objects(cell type); void find_data_references_step(cell *scan); void find_data_references(cell look_for_); void dump_code_heap(); void factorbug(); inline void vmprim_die(); //arrays array *allot_array(cell capacity, cell fill_); inline void vmprim_array(); cell allot_array_1(cell obj_); cell allot_array_2(cell v1_, cell v2_); cell allot_array_4(cell v1_, cell v2_, cell v3_, cell v4_); inline void vmprim_resize_array(); inline void set_array_nth(array *array, cell slot, cell value); //strings cell string_nth(string* str, cell index); void set_string_nth_fast(string *str, cell index, cell ch); void set_string_nth_slow(string *str_, cell index, cell ch); void set_string_nth(string *str, cell index, cell ch); string *allot_string_internal(cell capacity); void fill_string(string *str_, cell start, cell capacity, cell fill); string *allot_string(cell capacity, cell fill); inline void vmprim_string(); bool reallot_string_in_place_p(string *str, cell capacity); string* reallot_string(string *str_, cell capacity); inline void vmprim_resize_string(); inline void vmprim_string_nth(); inline void vmprim_set_string_nth_fast(); inline void vmprim_set_string_nth_slow(); //booleans void box_boolean(bool value); bool to_boolean(cell value); inline cell tag_boolean(cell untagged); //byte arrays byte_array *allot_byte_array(cell size); inline void vmprim_byte_array(); inline void vmprim_uninitialized_byte_array(); inline void vmprim_resize_byte_array(); //tuples tuple *allot_tuple(cell layout_); inline void vmprim_tuple(); inline void vmprim_tuple_boa(); //words word *allot_word(cell vocab_, cell name_); inline void vmprim_word(); inline void vmprim_word_xt(); void update_word_xt(cell w_); inline void vmprim_optimized_p(); inline void vmprim_wrapper(); //math cell bignum_zero; cell bignum_pos_one; cell bignum_neg_one; inline void vmprim_bignum_to_fixnum(); inline void vmprim_float_to_fixnum(); inline void vmprim_fixnum_divint(); inline void vmprim_fixnum_divmod(); bignum *fixnum_to_bignum(fixnum); bignum *cell_to_bignum(cell); bignum *long_long_to_bignum(s64 n); bignum *ulong_long_to_bignum(u64 n); inline fixnum sign_mask(fixnum x); inline fixnum branchless_max(fixnum x, fixnum y); inline fixnum branchless_abs(fixnum x); inline void vmprim_fixnum_shift(); inline void vmprim_fixnum_to_bignum(); inline void vmprim_float_to_bignum(); inline void vmprim_bignum_eq(); inline void vmprim_bignum_add(); inline void vmprim_bignum_subtract(); inline void vmprim_bignum_multiply(); inline void vmprim_bignum_divint(); inline void vmprim_bignum_divmod(); inline void vmprim_bignum_mod(); inline void vmprim_bignum_and(); inline void vmprim_bignum_or(); inline void vmprim_bignum_xor(); inline void vmprim_bignum_shift(); inline void vmprim_bignum_less(); inline void vmprim_bignum_lesseq(); inline void vmprim_bignum_greater(); inline void vmprim_bignum_greatereq(); inline void vmprim_bignum_not(); inline void vmprim_bignum_bitp(); inline void vmprim_bignum_log2(); unsigned int bignum_producer(unsigned int digit); inline void vmprim_byte_array_to_bignum(); cell unbox_array_size(); inline void vmprim_fixnum_to_float(); inline void vmprim_bignum_to_float(); inline void vmprim_str_to_float(); inline void vmprim_float_to_str(); inline void vmprim_float_eq(); inline void vmprim_float_add(); inline void vmprim_float_subtract(); inline void vmprim_float_multiply(); inline void vmprim_float_divfloat(); inline void vmprim_float_mod(); inline void vmprim_float_less(); inline void vmprim_float_lesseq(); inline void vmprim_float_greater(); inline void vmprim_float_greatereq(); inline void vmprim_float_bits(); inline void vmprim_bits_float(); inline void vmprim_double_bits(); inline void vmprim_bits_double(); fixnum to_fixnum(cell tagged); cell to_cell(cell tagged); void box_signed_1(s8 n); void box_unsigned_1(u8 n); void box_signed_2(s16 n); void box_unsigned_2(u16 n); void box_signed_4(s32 n); void box_unsigned_4(u32 n); void box_signed_cell(fixnum integer); void box_unsigned_cell(cell cell); void box_signed_8(s64 n); s64 to_signed_8(cell obj); void box_unsigned_8(u64 n); u64 to_unsigned_8(cell obj); void box_float(float flo); float to_float(cell value); void box_double(double flo); double to_double(cell value); void overflow_fixnum_add(fixnum x, fixnum y); void overflow_fixnum_subtract(fixnum x, fixnum y); void overflow_fixnum_multiply(fixnum x, fixnum y); inline cell allot_integer(fixnum x); inline cell allot_cell(cell x); inline cell allot_float(double n); inline bignum *float_to_bignum(cell tagged); inline double bignum_to_float(cell tagged); inline double untag_float(cell tagged); inline double untag_float_check(cell tagged); inline fixnum float_to_fixnum(cell tagged); inline double fixnum_to_float(cell tagged); template T *untag_check(cell value); template T *untag(cell value); //io void init_c_io(); void io_error(); inline void vmprim_fopen(); inline void vmprim_fgetc(); inline void vmprim_fread(); inline void vmprim_fputc(); inline void vmprim_fwrite(); inline void vmprim_fseek(); inline void vmprim_fflush(); inline void vmprim_fclose(); int err_no(); void clear_err_no(); //code_gc void clear_free_list(heap *heap); void new_heap(heap *heap, cell size); void add_to_free_list(heap *heap, free_heap_block *block); void build_free_list(heap *heap, cell size); void assert_free_block(free_heap_block *block); free_heap_block *find_free_block(heap *heap, cell size); free_heap_block *split_free_block(heap *heap, free_heap_block *block, cell size); heap_block *heap_allot(heap *heap, cell size); void heap_free(heap *heap, heap_block *block); void mark_block(heap_block *block); void unmark_marked(heap *heap); void free_unmarked(heap *heap, heap_iterator iter); void heap_usage(heap *heap, cell *used, cell *total_free, cell *max_free); cell heap_size(heap *heap); cell compute_heap_forwarding(heap *heap, unordered_map &forwarding); void compact_heap(heap *heap, unordered_map &forwarding); //code_block relocation_type relocation_type_of(relocation_entry r); relocation_class relocation_class_of(relocation_entry r); cell relocation_offset_of(relocation_entry r); void flush_icache_for(code_block *block); int number_of_parameters(relocation_type type); void *object_xt(cell obj); void *xt_pic(word *w, cell tagged_quot); void *word_xt_pic(word *w); void *word_xt_pic_tail(word *w); void undefined_symbol(); void *get_rel_symbol(array *literals, cell index); cell compute_relocation(relocation_entry rel, cell index, code_block *compiled); void iterate_relocations(code_block *compiled, relocation_iterator iter); void store_address_2_2(cell *ptr, cell value); void store_address_masked(cell *ptr, fixnum value, cell mask, fixnum shift); void store_address_in_code_block(cell klass, cell offset, fixnum absolute_value); void update_literal_references_step(relocation_entry rel, cell index, code_block *compiled); void update_literal_references(code_block *compiled); void copy_literal_references(code_block *compiled); void relocate_code_block_step(relocation_entry rel, cell index, code_block *compiled); void update_word_references_step(relocation_entry rel, cell index, code_block *compiled); void update_word_references(code_block *compiled); void update_literal_and_word_references(code_block *compiled); void check_code_address(cell address); void mark_code_block(code_block *compiled); void mark_stack_frame_step(stack_frame *frame); void mark_active_blocks(context *stacks); void mark_object_code_block(object *object); void relocate_code_block(code_block *compiled); void fixup_labels(array *labels, code_block *compiled); code_block *allot_code_block(cell size); code_block *add_code_block(cell type,cell code_,cell labels_,cell relocation_,cell literals_); //code_heap heap code; unordered_map forwarding; void init_code_heap(cell size); bool in_code_heap_p(cell ptr); void jit_compile_word(cell word_, cell def_, bool relocate); void iterate_code_heap(code_heap_iterator iter); void copy_code_heap_roots(); void update_code_heap_words(); inline void vmprim_modify_code_heap(); inline void vmprim_code_room(); code_block *forward_xt(code_block *compiled); void forward_frame_xt(stack_frame *frame); void forward_object_xts(); void fixup_object_xts(); void compact_code_heap(); inline void check_code_pointer(cell ptr); // next method here: //image cell code_relocation_base; cell data_relocation_base; void init_objects(image_header *h); void load_data_heap(FILE *file, image_header *h, vm_parameters *p); void load_code_heap(FILE *file, image_header *h, vm_parameters *p); bool save_image(const vm_char *filename); inline void vmprim_save_image(); inline void vmprim_save_image_and_exit(); void data_fixup(cell *cell); template void code_fixup(T **handle); void fixup_word(word *word); void fixup_quotation(quotation *quot); void fixup_alien(alien *d); void fixup_stack_frame(stack_frame *frame); void fixup_callstack_object(callstack *stack); void relocate_object(object *object); void relocate_data(); void fixup_code_block(code_block *compiled); void relocate_code(); void load_image(vm_parameters *p); //callstack template void iterate_callstack_object(callstack *stack_, T &iterator); void check_frame(stack_frame *frame); callstack *allot_callstack(cell size); stack_frame *fix_callstack_top(stack_frame *top, stack_frame *bottom); stack_frame *capture_start(); inline void vmprim_callstack(); inline void vmprim_set_callstack(); code_block *frame_code(stack_frame *frame); cell frame_type(stack_frame *frame); cell frame_executing(stack_frame *frame); stack_frame *frame_successor(stack_frame *frame); cell frame_scan(stack_frame *frame); inline void vmprim_callstack_to_array(); stack_frame *innermost_stack_frame(callstack *stack); stack_frame *innermost_stack_frame_quot(callstack *callstack); inline void vmprim_innermost_stack_frame_executing(); inline void vmprim_innermost_stack_frame_scan(); inline void vmprim_set_innermost_stack_frame_quot(); void save_callstack_bottom(stack_frame *callstack_bottom); template void iterate_callstack(cell top, cell bottom, T &iterator); inline void do_slots(cell obj, void (* iter)(cell *,factorvm*)); //alien char *pinned_alien_offset(cell obj); cell allot_alien(cell delegate_, cell displacement); inline void vmprim_displaced_alien(); inline void vmprim_alien_address(); void *alien_pointer(); inline void vmprim_dlopen(); inline void vmprim_dlsym(); inline void vmprim_dlclose(); inline void vmprim_dll_validp(); char *alien_offset(cell obj); char *unbox_alien(); void box_alien(void *ptr); void to_value_struct(cell src, void *dest, cell size); void box_value_struct(void *src, cell size); void box_small_struct(cell x, cell y, cell size); void box_medium_struct(cell x1, cell x2, cell x3, cell x4, cell size); //quotations inline void vmprim_jit_compile(); inline void vmprim_array_to_quotation(); inline void vmprim_quotation_xt(); void set_quot_xt(quotation *quot, code_block *code); void jit_compile(cell quot_, bool relocating); void compile_all_words(); fixnum quot_code_offset_to_scan(cell quot_, cell offset); cell lazy_jit_compile_impl(cell quot_, stack_frame *stack); inline void vmprim_quot_compiled_p(); //dispatch cell megamorphic_cache_hits; cell megamorphic_cache_misses; cell search_lookup_alist(cell table, cell klass); cell search_lookup_hash(cell table, cell klass, cell hashcode); cell nth_superclass(tuple_layout *layout, fixnum echelon); cell nth_hashcode(tuple_layout *layout, fixnum echelon); cell lookup_tuple_method(cell obj, cell methods); cell lookup_hi_tag_method(cell obj, cell methods); cell lookup_hairy_method(cell obj, cell methods); cell lookup_method(cell obj, cell methods); inline void vmprim_lookup_method(); cell object_class(cell obj); cell method_cache_hashcode(cell klass, array *array); void update_method_cache(cell cache, cell klass, cell method); inline void vmprim_mega_cache_miss(); inline void vmprim_reset_dispatch_stats(); inline void vmprim_dispatch_stats(); //inline cache cell max_pic_size; cell cold_call_to_ic_transitions; cell ic_to_pic_transitions; cell pic_to_mega_transitions; cell pic_counts[4]; /* PIC_TAG, PIC_HI_TAG, PIC_TUPLE, PIC_HI_TAG_TUPLE */ void init_inline_caching(int max_size); void deallocate_inline_cache(cell return_address); cell determine_inline_cache_type(array *cache_entries); void update_pic_count(cell type); code_block *compile_inline_cache(fixnum index,cell generic_word_,cell methods_,cell cache_entries_,bool tail_call_p); void *megamorphic_call_stub(cell generic_word); cell inline_cache_size(cell cache_entries); cell add_inline_cache_entry(cell cache_entries_, cell klass_, cell method_); void update_pic_transitions(cell pic_size); void *inline_cache_miss(cell return_address); inline void vmprim_reset_inline_cache_stats(); inline void vmprim_inline_cache_stats(); //factor void default_parameters(vm_parameters *p); bool factor_arg(const vm_char* str, const vm_char* arg, cell* value); void init_parameters_from_args(vm_parameters *p, int argc, vm_char **argv); void do_stage1_init(); void init_factor(vm_parameters *p); void pass_args_to_factor(int argc, vm_char **argv); void start_factor(vm_parameters *p); void start_embedded_factor(vm_parameters *p); void start_standalone_factor(int argc, vm_char **argv); char *factor_eval_string(char *string); void factor_eval_free(char *result); void factor_yield(); void factor_sleep(long us); //utilities void *safe_malloc(size_t size); vm_char *safe_strdup(const vm_char *str); void nl(); void print_string(const char *str); void print_cell(cell x); void print_cell_hex(cell x); void print_cell_hex_pad(cell x); void print_fixnum(fixnum x); cell read_cell_hex(); }; extern factorvm *vm; }