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* Ensure that a hash reorganization doesn't take placeKaz Kylheku2014-10-221-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | during a traversal, which could cause items to be visited twice or skipped. * gc.c (full_gc): Changed from static to exter (full_gc): Changed to internal linkage. * gc.h (full_gc): Declared. * hash.c (struct hash): New member, usecount. (struct hash_iter): New member, next. (reachable_iters): New static variable. (hash_mark): Reset the usecount of every reachable hash table. (hash_iter_mark): Add every reachable iterator to reachable_iters list. (make_hash, make_similar_hash, copy_hash): Initialize usecount. (gethash_c): Do not call hash_grow if usecount is nonzero. (hash_begin): Initialize next field of hash_iter to null. Increment use count on hash table. (hash_next): When traversal ends, release use count, and null out the hash table reference. (do_weak_tables): New static function. (do_iters): New static function. (hash_process_weak): Weak hash processing logic moved to do_weak_tables. Also calls do_iters. * txr.1: Describe hash table traversal, and the assurances and caveats about inserting and deleting items.
* * eval.c (interp_fun): If the function doesn't haveKaz Kylheku2014-10-211-0/+6
| | | | | specials, then don't bother saving and restoring dynamic env around the argument binding and evaluation.
* * eval.c (eval_init): Register notf intrinsic function.Kaz Kylheku2014-10-211-0/+16
| | | | | | | | | | | | | | * lib.c (do_not): New static function. (notf): New function. * lib.h (notf): Declared. * txr.1: Documented notf. * share/txr/stdlib/txr-case.txr (bindable): Eliminated. (txr-if): Use functional expression, taking advantage of notf. * txr.vim: Regenerated.
* * share/txr/stdlib/txr-case.txr: New file.Kaz Kylheku2014-10-211-0/+14
| | | | | | | | | | | | * txr.1: Document txr-if, txr-when and txr-case. * genvim.txr: Added new macro names. * tests/011/txr-case.expected: New file. * tests/011/txr-case.txr: New file. * txr.vim: Regenerated.
* Source file inclusion implemented: needed for macros.Kaz Kylheku2014-10-201-0/+23
| | | | | | | | | | | | | | | | | | | | | * match.c (include_s): New symbol variable. (v_load): Function extended to handle include semantics. (include): External wrapper function for doing inclusion via v_load. (syms_init): include_s initialized. * match.h (include_s): Declared. (include): Declared. * parser.y (check_for_include): New static function. (clauses_rev): Use check_for_include to replace @(include ..) directive. * txr.1: Documented include. * genvim.txr: Added include symbol. * txr.vim: Regenerated.
* * match.c (match_fun): Bugfix: replace incorrect plain returnKaz Kylheku2014-10-191-0/+10
| | | | | | | | | with debug_return. This causes a stray debug frame to be left on the environment stack which turns to garbage, leading to an invalid longjmp in another debug_return elsewhere which tries to use that frame. This was diagnosed by valgrind indicating accesses below the stack frame, and also by glibc "longjmp causes uninitialized stack frame" abort.
* * parser.l (lisp_parse): Bugfix: the error_stream argumentKaz Kylheku2014-10-191-0/+10
| | | | | | | | | must be checked to be a stream before we plant it in place of std_error, otherwise we will get a type exception thrown lower down, which leads to runaway recursion as TXR tries to print the error messages on std_error. * dep.mk: Regenerated.
* * parser.y (r_exprs): New grammar symbol. r_exprs usesKaz Kylheku2014-10-191-0/+10
| | | | | | | | | left-recursive rules to avoid filling the yacc stack, and returns the items in reverse order. The output of each r_exprs-generating rule consists of a list which gives the terminating atom, and then the list contents in reverse order. (n_exprs): Becomes wrapper for r_exprs which deals with the terminating atom, and reversed items.
* * parser.y: Allow TXR to support large programs, and efficiently so.Kaz Kylheku2014-10-181-0/+12
| | | | | | | | | | | (clauses_rev): New grammar symbol. Uses a left-recursive rule that does not consume an amount of parser stack proportional to the number of clauses, and sticks to efficient consing, which means that the list is built up in reverse. (clauses): Now just a wrapper rule for clauses_rev which nreverses its output. (clauses_opt): Retargetted to use clauses_rev instead of clauses, and reverse its output.
* Deal with situation when GC is disabled and the freshobj array runs outKaz Kylheku2014-10-181-0/+17
| | | | | | | | | | | | | | | | of room. This could happen when parsing a really large TXR program, since gc is disabled during parsing. Currently it asserts, which is not acceptable. * gc.c (make_obj): If after gc, the freshobj array has not been emptied (obviously because gc is disabled), do not assert. Rather, set the full_gc flag to request a full garbage collection when gc is re-enabled. Furthermore, only place newly allocated objects into freshobj if full_gc has not been set. Thus, if we exhaust the freshobj array while gc is off, the full_gc flag is set, and we discontinue use of that array. When gc is re-enabled, we will do a full gc pass. A full gc pass ignores freshobj array, so it doesn't matter that its use was discontinued.
* * match.c (mf_all): Drop data_lineno parameter. InitializeKaz Kylheku2014-10-181-0/+12
| | | | | | | | | | | the corresponding member based on whether or not data is nil. (do_match_line, mf_from_ml, match_filter, match_fun, extract): Do not pass starting line number argument to mf_all. This fixes a bug when the line number at @(eof) for an empty file comes out as zero. (mf_args, v_skip, v_fuzz, v_next, v_gather, v_collect, open_data_source, match_files): Use zero and one instead of num(0) and num(1).
* * match.c (v_eof): Bugfix: we are at EOF not only whenKaz Kylheku2014-10-171-0/+6
| | | | | the remaining data is nil but when it is (nil). This happens for interactive streams.
* * match.c (dest_bind): Remove the restriction of not allowingKaz Kylheku2014-10-171-0/+12
| | | | | | | | | | | @(expr ...) and @var on the left side of a bind. This is useful, and necessary for @(line @(lisp expr)) to work: matching computed line numbers and character positions. * txr.1: Document use of Lisp on left hand side of bind, that there is a restriction on the left hand side of a set, and that Lisp can be used in a line or chr directive for computed matches.
* * HACKING: New section Type Safety.Kaz Kylheku2014-10-171-0/+7
| | | | | | Table of contents regenerated with line numbers. * HACKING-toc.txr: New file.
* Converting cast expressions to macros that are retargettedKaz Kylheku2014-10-171-0/+94
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | to C++ style casts when compiling as C++. * lib.h (strip_qual, convert, coerce): New casting macros. (TAG_MASK, tag, type, wli_noex, auto_str, static_str, litptr, num_fast, chr, lit_noex, nil, nao): Use cast macros. * arith.c (mul, isqrt_fixnum, bit): Use cast macros. * configure (INT_PTR_MAX): Define using cast macro. * debug.c (debug_init): Use cast macro. * eval.c (do_eval, expand_macro, reg_op, reg_mac, eval_init): Use cast macros. * filter.c (filter_init): Use cast macro. * gc.c (more, mark_obj, in_heap, mark, sweep_one, unmark): Use cast macros. * hash.c (hash_double, equal_hash, eql_hash, hash_equal_op, hash_hash_op, hash_print_op, hash_mark, make_hash, make_similar_hash, copy_hash, gethash_c, gethash, gethash_f, gethash_n, remhash, hash_count, get_hash_userdata, set_hash_userdata, hash_iter_destroy, hash_iter_mark, hash_begin, hash_uni, hash_diff, hash_isec): Use cast macros. * lib.c (code2type, chk_malloc, chk_malloc_gc_more, chk_calloc, chk_realloc, chk_strdup, num, c_num, string, mkstring, mkustring, upcase_str, downcase_str, string_extend, sub_str, cat_str, trim_str, c_chr, vector, vec_set_length, copy_vec, sub_vec, cat_vec, cobj_print_op, obj_init): Likewise. * match.c (do_match_line, hv_trampoline, match_files, dir_tables_init): Likewise. * parser.l (grammar): Likewise. * parser.y (parse): Likewise. * rand.c (make_state, make_random_state, random_fixnum, random): Likewise. * regex.c (CHAR_SET_L2_LO, CHAR_SET_L2_HI, CHAR_SET_L1_LO, CHAR_SET_L1_HI, CHAR_SET_L0_LO, CHAR_SET_L0_HI, L0_full, L0_fill_range, L1_full, L1_fill_range, L1_contains, L1_free, L2_full, L2_fill_range, L2_contains, L2_free, L3_fill_range, L3_contains, L3_free, char_set_create, char_set_cobj_destroy, nfa_state_accept, nfa_state_empty, nfa_state_single, nfa_state_wild, nfa_state_set,
* Purge stray occurrences of "void *" from code base.Kaz Kylheku2014-10-171-0/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * lib.c (cobj_print_op): In the format call, cast the C pointer to val, since the ~p conversion now takes a val rather than void *. (cptr_equal_op, obj_print, obj_pprint): Remove cast to void *, since obj now already has the type that ~p expects. * lib.h (struct any): Use mem_t * instead of void *. * parser.h (yyscan_t): Repeat the definition from inside the Flex-generated lex.yy.c. (yylex_init, yylex_destroy, yyget_extra, yyset_extra): Re-declare using yyscan_t typedef in place of void *. * parser.l (yyget_column, yyerrprepf): Re-declare using yyscan_t. (grammar): Use yyg in place of yyscanner in calls to yyerrprepf. * parser.y (yylex, %lex-param): Use yyscan_t instead of void *. (parse): Use yyscan_t for local variable. * signal.c (stack): Change type from void * to mem_t *. * stream.c (vformat): Conversion specifier p extracts val instead of void *. (run): Use casts that only remove const, not all the way to void *. * txr.1: Documented p conversion specifier of format. * Makefile (OBJS-y): Initialize with := to make sure it is a simple variable, and not a macro. (SRCS): New variable, listing source files. (enforce): New rule for enforcing coding conventions. Currently checks for void * occurrences.
* * arith.c (gcd): Fix semantics. If either operand isKaz Kylheku2014-10-161-0/+17
| | | | | | | | | | | | | | | | zero, return the other operand. (lcm): New function. * eval.c (eval_init): Retarget registration of gcd to variable argument gcdv function. Register lcm. * lib.c (gcdv, lcmv): New functions. * lib.h (gcdv, lcm, lcmv): Declared. * txr.1: Re-document gcd with coverage of lcm. * txr.vim: Regenerated.
* * arith.c (gcd, lognot): Bugfix: bignum resultsKaz Kylheku2014-10-161-0/+5
| | | | in fixnum range not normalized.
* * match.c (dest_bind): More detailed log message for variableKaz Kylheku2014-10-161-0/+5
| | | | mismatch.
* New @(line) and @(chr) directives.Kaz Kylheku2014-10-161-0/+15
| | | | | | | | | | | | | * match.c (line_s): New variable. (h_chr, v_line): New static functions. (syms_init): line_s initialized. (dir_tables_init): Register v_line and h_chr. * match.h (line_s): Declared. * txr.1: Document @(line) and @(chr) directives. * txr.vim: Regenerated.
* * match.c (subst_vars): Fix buggy rendering of TXR Lisp expressionsKaz Kylheku2014-10-151-0/+18
| | | | | | | | | | | | | | | | | that evaluate to lists. For instance `@(list)` renders to the string "nil", and `@(list 1 2)` renders as "(1 2)". The desired behavior is "" and "1 2", respectively. (do_output_line): In output directives, there is a similar problem. A @(list) in the middle of an output block turns to nil, and a @(list 1 2) renders in parentheses as (1 2). Furthermore, there is the additional problem that no filtering is applied to the interpolated value. These behaviors are subject to the compatibility option, since they change the externally visible behavior of TXR programs. * txr.1: Document that empty lists in @(output) variable substitutions turn into nothing. Document value of 100 for -C option, describing the above issue.
* More type safety, with help from C++ compiler.Kaz Kylheku2014-10-141-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | * parser.h (scanner_t): New typedef. Cleverly, we use yyguts_t as the basis for this, which pays off in a few places, getting rid of conversions. (parser_t): scanner member redeclared to scanner_t *. (yyerror, yyerr, yyerrof, end_of_regex, end_of_char): Declarations updated. * parser.l (yyerror, yyerrorf, num_esc): scanner argument becomes scanner_t * instead of void *. (yyscanner): Occurrences replaced by yyg: why should we refer to the type-unsafe void *yyscanner, when we know that in the middle of the yylex function we have the properly typed yyguts_t *yyg. (end_of_regex, end_of_char): Argument changes to scanner_t * and name strategically changes to yyg, eliminating the local variable and cast. * parser.y (sym_helper): scanner argument becomes scanner_t * instead of void *. (%parse-param}: void *scnr becomes scanner_t *scnr. (define-transform, yybadtoken): Use scanner_t * instead of void *. (parse): Since yylex_init takes a void **, we use it to initialize a local void *, and then assign it to the structure member.
* C++ upkeep.Kaz Kylheku2014-10-141-0/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TXR's support for compiling as C++ pays off: C++ compiler finds serious bugs introduced in August 2 ("Big switch to reentrant lexing and parsing"). The yyerror function was being misused; some of the calls reversed the scanner and parser arguments. Since one of the two parameters is void *, this reversal wasn't caught. * parser.l (yyerror): Fix first two arguments being reversed. (num_esc): Change previously correct call to yyerror to follow reversed arguments, so that it stays correct. * parser.y (%parse-param): Change order of these directives so that the scnr parameter is before the parser parameter. This causes the yacc-generated calls to yyerror to have the arguments in the correct order. It also has the effect of changing the signature of yyparse, reversing its parameters. (parse): Update call to yyparse to new argument order. * parser.h (yyparse): Declaration removed. (yyerror): Declaration updated. * regex.c (regex_kind_t): New enum typedef. (struct regex): Use regex_kind_t rather than an enum inside the struct, which has different scoping rules under C++. * txr.c (get_self_path): Fix signed/unsigned warning.
* * txr.1: Round of fixes.Kaz Kylheku2014-10-131-0/+4
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* * eval.c (eval_init): Register greater function as intrinsic.Kaz Kylheku2014-10-131-0/+22
| | | | | | | | | | | | | | | | | | | | * lib.c (gt_f, lt_f): Global variables removed. (greater_f): New variable. (greater): New function. (find_max, pos_max): Use greater_f as default for testfun, rather than gt_f. (find_min, pos_min): Use less_f as default for testfun, rather than lt_f. (obj_init): Remove references to gt_f and lt_f. GC-protect and initialize greater_f. * lib.h (greater_f): Declared. (gt_f, lt_f): Declarations removed. * txr.1: Documented greater, and use of less and greater in pos-min, pos-max, find-min and find-max. * txr.vim: Regenerated.
* * genvim.txr (sortuniq): Remove unnecessary function,Kaz Kylheku2014-10-131-0/+5
| | | | since (sortuniq list) can be done as (sort (uniq list)).
* * eval.c (merge_wrap): New static functionKaz Kylheku2014-10-121-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | (eval_init): Register less as intrinsic. Retarget merge intrinsic to merge_wrap for proper argument defaulting which is missing from merge, and which we don't want to introduce there since internal calls to merge don't erquire it. Change registration of sort so it has only one required argument, not two. * lib.c (less_f): New global variable. (less_tab): New static array. (less_tab_init): New static function. (less): New function. (sort): Default lessfun argument to the less function. (obj_init): GC-protect the less_f variable. Initialize it with a function object made from the less function. (init): Call less_tab_init. * lib.h (enum type): New enumeration member MAX_TYPE, an alias for the largest type. (less_f, less): Declared. * txr.1: Documented new less function, and that the lessfun argument in sort and merge is optional, defaulting to less. * txr.vim: Regenerated.
* * eval.c (eval_init): Register chr_isblank and chr_isunisp asKaz Kylheku2014-10-111-0/+17
| | | | | | | | | | | | | | | | intrinsics. * lib.c (chr_isblank, chr_isunisp): New functions. * lib.h (chr_isblank, chr_isunisp): Declared. * regex.h (spaces): Declaration for existing variable added. * txr.1: Documented chr-isblank and chr-isunisp. * genvim.txr: Add missing sysif.c. * txr.vim: Regenerated.
* Fix gc safety issue in abs_path_p function.Kaz Kylheku2014-10-091-0/+9
| | | | | | | * stream.c (ap_regex): New static variable. (abs_path_p): Remove local reg variable; replace uses of reg with ap_regex. (stream_init): gc-protect ap_regex.
* * stream.c (stream_init): No need to gc-protectKaz Kylheku2014-10-091-0/+10
| | | | | | | | | std_input, std_output, std_debug, std_error and std_null. These are not ordinary variables but macros which expand to locations in the variable binding environment that are already protected. This call was actually doing nothing, because the symbol involved in the expression std_input is not yet initialized and so &std_input yields a null pointer which causes protect to bail.
* Moving system interface functions to separate module out ofKaz Kylheku2014-10-081-0/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the eval and stream modules. * Makefile (OBJS): Add sysif.o. * dep.mk: Regenerated. * eval.c (errno_wrap, daemon_wrap, exit_wrap, usleep_wrap, getpid_wrap, getppid_wrap, env_hash): Functions moved to sysif.c and changed to static functions. (eval_init): Registrations of functions moved to sysif.c. * lib.c (init): Call sysif_init. * stream.c (w_stat, statf, mkdir_wrap, chdir_wrap, getcwd_wrap, makedev_wrap, minor_wrap, major_wrap, mknod_wrap): Functions moved to sysif.c and become static functions. (stream_init): Registration of stat moved to sysif.c. (open_files, open_files_star): Bugfix: no longer erroneously included in #ifdef HAVE_UNISTD_H block. * stream.h (mkdir_wrap, chdir_wrap, getcwd_wrap, makedev_wrap, minor_wrap, major_wrap, mknod_wrap, symlink_wrap, link_wrap, readlink_wrap): Declarations removed. * sysif.c: New file. * sysif.h: New file.
* Add test case for recent breakage.Kaz Kylheku2014-10-081-0/+12
| | | | | | | | | | * tests/006/freeform-3.expected: New file. * tests/006/freeform-3.txr: New file. * tests/006/passwd: New file. * Makefile (TXR_ARGS): Set up for new test case.
* Fix 2011-12-03 regression. The freeform directive codeKaz Kylheku2014-10-081-0/+20
| | | | | | | | | | | | | | | | | | | relies on lazy_str_get_trailing_list and the behavior of that function changed because (split-str "" any-separator) changed from returning nil to returning the empty string. The resulting behavior change of lazy_str_get_trailing_list was later described in the documentation, thereby codifying it. This patch changes the lazy_str_get_trailing_list behavior, which is poor, and causes infinite looping. We do not want an extra empty string prepended, because it looks like a spurious line. * lib.c (lazy_str_get_trailing_list): if split_str produces a the list (""), then just return the unmaterialized list from the lazy string without prepending that one-element list to it. * txr.1: Updated documentation for lazy-str-get-trailing-list.
* Version 99.txr-99Kaz Kylheku2014-10-051-0/+14
| | | | | | | | | | | | * RELNOTES: Updated. * configure, txr.1: Bumped version. * share/txr/stdlib/ver.txr: Likewise * Makefile: Improve binary packaging rules. * regex.c: #include <stdarg.h> added.
* Printing of regular expression objects implemented.Kaz Kylheku2014-10-041-0/+10
| | | | | | | | * regex.c (regex_print): New static function. (regex_obj_ops): Registered regex_print. (print_class_char, paren_print_rec, print_rec): New static functions. * dep.mk: Regenerated.
* Keep regex source code in regex objects, in anticipationKaz Kylheku2014-10-041-0/+10
| | | | | | | | | of pretty-printing. Fix object construction bugs. * regex.c (struct regex): New member, source. (regex_mark): Ensure source is visited by garbage collector. (regex_compile): Store regex_sexp in source. Fix violations of section 3.2 of HACKING document.
* Eliminating the extra list wrapping applied to regularKaz Kylheku2014-10-031-0/+20
| | | | | | | | | | | | | | | | | | | expression objects in the syntax tree. The parser just puts out a #<regex ...> instead of (#<regex ...> regex-syntax). * eval.c (do_eval): We no longer need the hack of treating (#<regex> ...) as a special form which evaluates to #<regex>. (expand): We no longer have to skip over regex syntax, so the case is removed. * match.c (h_var, do_txeval, do_match_line): regexp cases are no longer subcases of consp but stand on their own. In do_match_line, we introduce a COBJ case into the type switch for regexes. * parser.y: regexes are now compiled in the regex and lisp_regex grammar rules instead of the dependent rules, and are not wrapped in extra syntax.
* * match.c (h_var): Fix regression introduced in 2014-08-11Kaz Kylheku2014-10-031-0/+12
| | | | | | | | | | | commit. The incompleteness of that change broke the case of an unbound variable followed by a bound variable. The value of the second variable was still being wrapped in the old complicated representation before being pushed to the front of the spec. * txr.1: Replace bogus text which says that variables are not bound to regexes, and so regex matches from variable substitutions do not arise. This works fine after this change.
* * Makefile: rules that rely on values from config.makeKaz Kylheku2014-10-031-0/+5
| | | | now have config.make as a prerequisite.
* Using unified COBJ representation for both regex kinds,Kaz Kylheku2014-10-021-0/+25
| | | | | | | | | | | | | | | | | | | | | | | | rather than the list-based notation for derivative-based regexes, and an encapsulated COBJ for NFA-based regexes. * lib.c (compiled_regex_s): Variable removed. (obj_init): Initialization of compiled_regex_s removed. * lib.h (compiled_regex_s): Declaration removed. * regex.c (struct regex, regex_t): New type. (regex_destroy): Object is now a regex_t, not nfa_t. (regex_mark): New function. (regex_obj_ops): Register regex_mark operation. (reg_nullable, reg_derivative): Remove cases that handles compiled_regex_s. (regex_compile): Output of dv_compile_regex becomes a cobj nwo. Output of nfa_compile_regex must be embedded in regex_t structure. (regexp): Drop the check for compiles_regex_s. (regex_nfa): Function removed. (regex_run, regex_machine_init): Use cobj_handle to retrieve regex_t * pointer and dispatch appropriate code based on regex->kind.
* * genman.txr: Add PayPal donation button.Kaz Kylheku2014-09-301-0/+7
| | | | | * txr.1: Avoid escapes at the end of a line; man2html doesn't handle this properly.
* * genman.txr: TXR is now bolded in the title.Kaz Kylheku2014-09-301-0/+6
| | | | * txr.1: More formatting and wording fixes.
* * lib.c (do_and): Fix andf again: (andf) not producingKaz Kylheku2014-09-261-0/+5
| | | | a function that returns t, as documented.
* Version 98.txr-98Kaz Kylheku2014-09-261-0/+12
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* * txr.1: Substantially revised with rich troff markup,Kaz Kylheku2014-09-261-0/+8
| | | | | | | and restructured in some places. * genman.txr: No longer generate the whole document in monospaced font. Add hyperlinks.
* * lib.c (do_and, do_or): Fix broken andf and orf,Kaz Kylheku2014-09-251-0/+6
| | | | | lacking the semantics of returning the last value, or the first true value, respectively.
* * Makefile (txr-manpage.pdf): New target.Kaz Kylheku2014-09-221-0/+4
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* * lib.c (compat_fixup): void return changed to int.Kaz Kylheku2014-09-101-0/+10
| | | | | | | | | Returns minimum supported emulation. * lib.h (compat_fixup): Declaration fixed. * txr.c (compat): Replace hard-coded min version by return value of compat_fixup.
* * txr.c (help): List new --compat option.Kaz Kylheku2014-09-091-0/+10
| | | | | | | | | (requires_arg, do_fixnum_opt, compat, array_dim, gc_delta): New static functions. (txr_main): Use do_fixnum_opt for handling options with integer argument. Add --compat alias for -C. * txr.1: Documented --compat. Added missing description of --debugger.
* * txr.c (txr_main): Cleaning up option handling code.Kaz Kylheku2014-09-091-0/+5
| | | | Better checking for misused long options.
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