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* Context form error reporting in sys:capture-cont.Kaz Kylheku2015-10-283-18/+24
| | | | | | | | | | | | | | * unwind.c (sys_capture_cont_s): New variable. (uw_capture_cont): Second argument is now a context form rather than a symbol; eval_error is used for error reporting. The form's operator symbol si used in the error message, or else sys:capture-cont if the context argument is null or missing. (uw_late_init): Initialize sys_capture_cont_s. * unwind.h (uw_capture_cont): Declaration updated. * txr.1: Documented.
* Expose eval_error out of eval module.Kaz Kylheku2015-10-282-1/+2
| | | | | | * eval.c (eval_error): Static function made external. * eval.h (eval_error): Declared.
* Move noreturn macro.Kaz Kylheku2015-10-282-6/+6
| | | | | | * lib.h (noreturn): Defined here. * unwind.h (noreturn): Removed from here.
* New special macro parameter list parameter :form.Kaz Kylheku2015-10-282-12/+30
| | | | | | | | * eval.c (form_k): New keyword symbol variable. (bind_macro_params): Implement form_k. (eval_init): Initialize form_k. * txr.1: Documented :form parameter.
* Improvement in place macros.Kaz Kylheku2015-10-282-13/+40
| | | | | | | | | | | Expansion of places now gives priority to place macros. Moreover, it iterates over place macro and ordinary macro expansion. * share/txr/stdlib/place.tl (sys:trigger-load): Removed. (sys:pl-expand): Rewritten. * txr.1: Documented.
* Remove no-longer-needed bulk bit operations.Kaz Kylheku2015-10-271-17/+3
| | | | | | | * signal.c (mem_set_bits, mem_clr_bits): Static functions removed. (sig_mask): Operate on set member of small_sigset_t directly rather than as an array of bytes.
* Fix C++ clash in slots implementation.Kaz Kylheku2015-10-271-2/+2
| | | | | * struct.c (make_struct_type): Don't use nullptr identifier as variable name.
* Reduce size of saved/restored signal masks.Kaz Kylheku2015-10-272-23/+31
| | | | | | | | | | | | | | | | | | | | | | | | | On glibc, sigset_t has a ridiculous size: one kilobyte! The kernel doesn't access most of it in the sigprocmask call. Yet it blows up the size of our dynamic frames quite a lot. In this commit, we define a small_sigset_t type and use that instead. We convert to the bloated one when calling the library. * signal.c (sig_blocked_cache): Type changes to small_sigset_t. (sig_reload_cache): Retrieve signal mask with sigprocmask into a local variable, then copy a small portion from that to sig_blocked_cache. (small_sigfillset): New static function. (set_sig_handler): Local variables of sigset_t changed to small_sigset_t. (sig_mask): Arguments are pointers to small_sigset_t. Conversion to sigset_t done around the call to sigprocmask. * signal.h (copy_sigset): Inline funtion removed. (small_sigset_t): New struct type. (extended_jmp_buf): Member blocked changed to small_sigset_t. (extended_setjmp): Cast expression updated with small_sigset_t *. (extended_longjmp): Use assignment instead of copy_sigset. (sig_blocked_cache, sig_mask): Declarations updated.
* Fix *listener-hist-len* in ~/.txr_profile not working.Kaz Kylheku2015-10-271-3/+5
| | | | | | | | | | On startup, the history is trimmed to 100 lines regardless of the variable's value in the profile file. * parser.c (repl): Load the rc file first, then load the history file. Furthermore, call lino_hist_set_max_len between these operations with the latest value pulled from the *listener-hist-len* variable.
* Fix size growth of nested continuation capture.Kaz Kylheku2015-10-271-1/+2
| | | | | | | | | | | | | The issue is that captures from within a restarted continuation of the same continuation, are using the restart prompt as the delimiter rather than re-using captured block of the same name. Thus each successive capture adds a new frame, causing the size to grow drastically. * unwind.c (uw_capture_cont): Allow the existing captured block to be the delimiter; don't delimit up to the revive_cont's prompt block of the same name.
* Capture portion of stack beyond prompting block.Kaz Kylheku2015-10-261-1/+3
| | | | | | | | | | Without this we don't properly capture some of the context in some built-in special operator functions like op_for when we capture up to their implicit blocks. * unwind.c (capture_cont): Capture an extra region of the stack above the delimiting block. 32 words seems like a reasonable fudge value.
* TXR gets delimited continuations.Kaz Kylheku2015-10-253-5/+345
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * unwind.c (sys_cont_s): New symbol variable. (uw_pop_block): New function, supporting uw_block_end macro. Special logic is needed for popping blocks now, because a block can be a captured stub at the top of a continuation, which must not be popped in the regular manner. (struct cont): New struct type. (cont_destroy, cont_mark): New static functions. (cont_ops): New static structure. (revive_cont, capture_cont): New static functions. (uw_capture_cont): New functions. (uw_init): Initialize sys_cont_s. Register sys:capture-cont intrinsic. * unwind.h (enum uw_frtype): New enum member UW_CAPTURED_BLOCK. When a block is captured as a stub copy of the prompt block of a delimited continuation, its type is changed from UW_BLOCK to this new type. This does two things: it makes the block invisible to block-related code that does nothing with continuations (code that looks for UW_BLOCK and ignores anything else). Secondly, there is some special handling related to UW_CAPTURED_BLOCK frames. (uw_pop_block, uw_capture_cont): Declared. (uw_block_begin): New local pointer uw_rslt introduced which helps communicate the result variable over to the uw_block_end macro (so we don't have to add a variable argument to the latter). (uw_block_end): Use uw_pop_block instead of uw_pop_frame. * txr.1: Documented delimited continuations.
* Bugfix: incompletely implemented zap macro.Kaz Kylheku2015-10-251-2/+2
| | | | * share/txr/stdlib/place.tl (zap): Missing second argument.
* Expose memory region marking function.Kaz Kylheku2015-10-252-0/+6
| | | | | | * gc.c (gc_mark_mem): New function. * gc.h (gc_mark_mem): Declared.
* Stop using C library setjmp/longjmp.Kaz Kylheku2015-10-2526-32/+270
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TXR is moving to custom assembly-language routines. This is mainly motivated by a very dubious thing done in the GNU C Library setjmp and longjmp in the name of security. Evidently, glibc's setjmp "mangles" certain pointer values which are stored into the jmp_buf buffer. It's been that way since 2005, evidently. This means that, firstly, all along, the use of setjmp in gc.c to get registers into a buffer so they can be scanned has not actually worked properly. More importantly, this pointer mangling in setjmp and longjmp is very hostile to a stack copying implementation of delimited continuations. The reason is that continuations contain jmp_buf buffers, which get relocated in the process of capturing and reviving a continuation. Any pointers in a jmp_buf which point into the captured stack segment have to be fixed up to point into the relocated location. Mangled pointers make this difficult, requiring hacks which are specific to glibc and the machine architecture. We might as well implement a clean, well-behaved setjmp and longjmp. * Makefile (jmp.o): New object file. (dbg/%.o, opt/%.o): New rules for .S prerequisites. * args.c, arith.c, cadr.c, combi.c, cadr.c, combi.c, debug.c, eval.c, filter.c, glob.c, hash.c, lib.c, match.c, parser.c, rand.c, regex.c, signal.c, stream.c, struct.c, sysif.c, syslog.c, txr.c, unwind.c, utf8.c: Removed <setjmp.h> include. * gc.c: Switch to struct jmp and jmp_save, instead of jmp_buf and setjmp. * jmp.S: New source file. * signal.h (struct jmp): New struct type. (jmp_save, jmp_restore): New function declarations denoting assembly language routines in jmp.S. (extended_jmp_buf): Uses struct jmp instead of setjmp. (extended_setjmp): Use jmp_save instead of setjmp. (extended_longjmp): Use jmp_restore instead of longjmp.
* Reduce stack usage for args in a few places.Kaz Kylheku2015-10-242-5/+3
| | | | | | * eval.c (apply, do_eval): Use ARGS_MIN instead of ARGS_MAX. * unwind.c (uw_throw): Ditto, when invoking handler.
* Implementing truncate-stream.Kaz Kylheku2015-10-215-10/+104
| | | | | | | | | | | | | | | | | | | | | | | * configure: Test for ftruncate and chsize. * stream.c (unimpl_truncate): New static function. (fill_stream_ops): Default the truncate operation to unimpl_truncate. (null_ops): Initialize truncate to unimpl_truncate. (stdio_truncate): New static function. (stdio_ops, tail_ops): Initialize truncate to stdio_truncate. (pipe_ops, dir_ops, string_ops, byte_in_ops, string_out_ops, strlist_out_ops, cat_stream_ops): Initialize truncate to null, so it gets defaulted by fill_stream_ops. (truncate_stream): New function. (stream_init): Register truncate-stream intrinsic. * stream.h (struct strm_ops): New member, truncate. (strm_ops_init): New truncate argument added to macro. (truncate_stream): Declared. *syslog.c (syslog_strm_ops): Initialize truncate to null. * txr.1: Documented.
* Correction in error message on unimplemented seek.Kaz Kylheku2015-10-211-1/+1
| | | | | * stream.c (unimpl_seek): Function should identify itself as seek-stream, not seek.
* Doc improvements in Structures.Kaz Kylheku2015-10-191-10/+16
| | | | | * txr.1: mention defmeth in Structures intro plus a number of wording changes and corrections.
* defmeth and with-objects formatting fix.Kaz Kylheku2015-10-191-1/+2
| | | | | * txr.1: Bad syntax formatting in defmeth. Missing .desc under with-objects.
* Version 120.txr-120Kaz Kylheku2015-10-186-374/+430
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* Bugfix: unterminated format argument list in repl code.Kaz Kylheku2015-10-181-1/+1
| | | | | * parser.c (repl): Missing nao terminator in format call which computes expression name.
* Support binary specifier in format.Kaz Kylheku2015-10-172-5/+31
| | | | | | | | * stream.c (formatv): New 'b' case along side 'o', handling binary in straightforward way for bignums, and with binary formatting loop code for fixnums. * txr.1: Documented b.
* Use chk_manage_vec for static slots arrays.Kaz Kylheku2015-10-171-4/+7
| | | | | | | | * struct.c (make_struct_type): Use chk_manage_vec for initial allocation of static slot array. (static_slot_ensure): Use chk_manage_vec to grow the array when adding a slot. The function will automatically double the array in power of two step sizes.
* New function chk_manage_vec.Kaz Kylheku2015-10-172-0/+51
| | | | | | | | | | | | This function manages a dynamic array using only the filled size as input, while minimizing reallocations. The allocated size is implicitly always the next power of two at or above the filled size. * lib.c (next_pow_two): New static function. (chk_manage_vec): New function. * lib.h (chk_manage_vec): Declared.
* Fix overflow check using wrong variable.Kaz Kylheku2015-10-171-1/+1
| | | | | * lib.c (chk_grow_vec): It is newelems which must be compared against the no_oflow value, not bytes.
* New test case for handle and frame introspection.Kaz Kylheku2015-10-172-0/+19
| | | | | | * tests/012/except.tl: New file. * tests/012/except.expected: New file.
* Streamline handling of struct type arguments.Kaz Kylheku2015-10-172-98/+86
| | | | | | | | | | * struct.c (stype_handle): New static function. (make_struct_type, super, make_struct, static_slot, static_slot_set, static_slot_ensure, slotp, static_slot_p): Use stype_handle, * txr.1: Documented that static-slot and static-slot-set take type as a symbol.
* Fix formatting under caar, cadr, ...Kaz Kylheku2015-10-161-0/+1
| | | | * txr.1: .cblk with no closing .cble.
* Adding defmeth macro and static-slot-ensure.Kaz Kylheku2015-10-164-0/+135
| | | | | | | | | | | | | | | | | * share/txr/stdlib/struct.tl (defmeth): New macro. * struct.c (struct struct_type): New member, dvtypes. (struct_init): Register static-slot-ensure intrinsic. (make_struct_type): Initialize dvtypes of newly instantiated struct_type struct. If a super is specified, add new type to the super's dvtypes. (struct_type_mark): Mark st->dvtypes. (static_slot_ensure): New function. * struct.h (static_slot_ensure): Declared. * txr.1: Documented defmeth and static-slot-ensure.
* Remove use of the system function.Kaz Kylheku2015-10-162-19/+35
| | | | | | | | | | System depends on environment variables, and also causes SIGINT and SIGQUIT to be ignored. * stream.c (sh): Function rewritten in terms of sh, in two platform variants. * txr.1: Documented that sh doesn't use system as of TXR 120.
* Most uses of auto_str should be static_str.Kaz Kylheku2015-10-161-3/+3
| | | | | | | | | These functions do exactly same thing, but communicate something different to the reader of the code. An auto_str is on the stack, and so must not be passed somewhere where it will be retained. * txr.c (help, compat, txr_main): Use static_str on version.
* Renaming some functions for consistency.Kaz Kylheku2015-10-168-42/+69
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * combi.c (perm_list, perm_str, rperm_list, reperm_gen_fun, rperm_vec, comb_vec, rcomb_list, rcomb_vec, rcomb_str): Follow rename of list_vector to list_vec. * eval.c (vector_list_s): Global variable renamed to vec_list_s. (expand_qquote): Follow vector_list_s to vec_list_s. (eval_init): Follow renames of all identifiers. Functions num-chr, chr-num, vector-list and list-vector are registered under new names, while remaining registered under old names. * eval.h (vector_list_s): Declaration renamed. * filter.c (url_encode): Follow chr_num to chr_int rename. * lib.c (make_like, interpose, shuffle): Follow vector_list to vec_list rename. (tolist, replace, replace_list): Follow list_vector to list_vec rename. (num_chr): Renamed to int_chr. (chr_num): Renamed to chr_int. (vector_list): Renamed to vec_list. (list_vector): Renamed to list_vec. * lib.h (num_chr, chr_num, list_vector, vector_list): * Declarations renamed. * parser.y (vector): Follow vector_list to vec_list rename. * txr.1: Updated documentation for num-chr, chr-num, list-vector and vector-list with new names, and notes about the old names being supported, but obsolescent.
* Adding find-frame function.Kaz Kylheku2015-10-154-2/+110
| | | | | | | | | | | | * unwind.c (uw_find_frame): New function. (uw_late_init): Registered find-frame intrinsic. * unwind.h (uw_find_frame): Declared. * lib.h (default_arg_strict): New inline function. Will not replace nil value with default. * txr.1: Documented find-frame.
* Introspection over catch and handle frames.Kaz Kylheku2015-10-153-1/+242
| | | | | | | | | | | | | | * unwind.c (types_s, jump_s): New symbol variables. (frame_type, catch_frame_type, handle_frame_type): New globals denoting struct types. (uw_get_frames, uw_invoke_catch): New functions. (uw_late_init): Initialize new global variables. Register get-frames and invoke-catch intrinsics. * unwind.h (uw_get_frames, uw_invoke_catch): Declared. * txr.1: Documented frame, catch-frame, handle-frame, get-frames and invoke-catch.
* List another limitation of listener.Kaz Kylheku2015-10-151-0/+6
| | | | * txr.1: suports only VT100.
* Slight section restructuring.Kaz Kylheku2015-10-141-1/+3
| | | | * txr.1: Object Type and Equivalence split into two.
* Adding typecase macro.Kaz Kylheku2015-10-143-0/+97
| | | | | | | | | | * lisplib.c (type_set_entries, type_instantiate): New static functions. (lisplib_init): Register new functions in dl_table. * share/txr/stdlib/type.tl: New file, providing typecase * txr.1: Documented typecase.
* New way of handling exceptions without unwinding.Kaz Kylheku2015-10-147-7/+350
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * eval.c (handler_bind_s): New symbol variable. (op_handler_bind): New static function. (do_expand): Traverse handler-bind forms. (eval_init): Initialize handler_bind_s variable and register handler-bind operator. * lisplib.c (except_set_entries, except_instantiate): New functions. (lisplib_init): Register new functions in dl_table. * parser.c (intr_s): New symbol variable. (repl_intr): Throw exception of type intr, rather than error. This way we can interrupt accidental exception handling loops involving exceptions derived from error. (parse_init): Initialize intr_s. * share/txr/stdlib/except.tl: New file, defines handle macro. * unwind.c (uw_push_handler): New function. (invoke_handler): New static function. (uw_throw): Search loop looks for and processes handlers in addition to catches. * unwind.h (uw_frtype_t): New enum member, UW_HANDLE. (struct uw_catch): Move member visible so it is in the same position as in struct uw_handler. (struct uw_handler): New struct type. (union uw_frame): New member ha of type struct uw_handler. (uw_push_handler): Function declared. * txr.1: Added introductory paragraphs to Exception Handling section. Documented handler-bind and handle. Some minor errors corrected.
* Go into listener if no arguments are given.Kaz Kylheku2015-10-131-0/+24
| | | | | | | | * txr.c (help): Document the behavior. (banner): New static function. (txr_main): If listener support compiled in, show the banner and go to REPL instead of showing the usage hint and bailing.
* Capitalization in help text.Kaz Kylheku2015-10-131-3/+3
| | | | * txr.c (help): Capitalize TXR, Copyright and Usage.
* Hash table iterators exposed, with new macro.Kaz Kylheku2015-10-114-0/+141
| | | | | | | | | | | * eval.c (eval_init): Register hash-begin and hash-next intrinsics. * lisplib.c (hash_set_entries, hash_instantiate): New static functions. (lisplib_init): Register new tables in dl_table. * share/txr/stdlib/hash.tl: New file. * txr.1: Document with-hash-iter macro.
* Invoke finalizers if object initialization bails.Kaz Kylheku2015-10-102-0/+22
| | | | | | | | | | * struct.c (make_struct): Add unwind protection around the initialization of the struct object, which calls the partially initialized object's finalizers if initialization is abandoned by a non-local exit. * txr.1: Document the behavior, under make-struct and the new macro.
* Struct finalizers should be registered first.Kaz Kylheku2015-10-102-15/+15
| | | | | | | | | | | * share/txr/stdlib/struct.tl (defstruct): Rearrange the generated instance initialization function so that if a :fini block was specified, it is performed first. Thus if the remaining initialization code is abandoned, it is possible to intercept that and invoke the finalizer, which can clean up any mess left behind. * txr.1: Document changed order.
* defstruct bugfix: nonexistent function called.Kaz Kylheku2015-10-101-6/+6
| | | | | * share/txr/stdlib/struct.tl (defstruct): The nonexistent uw-throwf function was called instead of throw.
* Version 119.txr-119Kaz Kylheku2015-10-106-406/+479
| | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version and date. * share/txr/stdlib/ver.tl: Likewise. * txr.vim, tl.vim: Regenerated.
* New macro: with-objects.Kaz Kylheku2015-10-103-1/+62
| | | | | | | | | | | * lisplib.c (with_resources_set_entries): "with-objects" added to name table. * share/txr/stdlib/with-resources.tl (with-objects): New macro. * txr.1: Documented with-objects. Added note to :fini specifier of defstruct pointing to call-finalizers and with-objects.
* Improve progn expansion.Kaz Kylheku2015-10-091-4/+13
| | | | | * eval.c (do_expand): Reduce (progn) to nil, and (progn single) to single.
* Tweaking expansions of when and until.Kaz Kylheku2015-10-092-6/+14
| | | | | | | * eval.c (me_when): Expand to if if there aren't multiple body forms. (me_unless): Simplify progn. * tests/012/struct.tl: Update string representation in struct test case.
* Add note to :init and :fini.Kaz Kylheku2015-10-091-0/+14
| | | | * txr.1: Unlike methods, these don't have an implicit block.
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