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Fixing some errors in copyright comments.
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For instance given @(bind a ("a" "b" "c")) it is now possible
to do @(filter :upcase a) whereby a promptly takes on the value
("A" "B" "C").
* filter.c (string_filter): Function renamed to string_tree_filter.
(compound_filter): Follows rename.
(filter_string): Function renamed to filter string tree.
Can filter tree of strings, or possibly other objects,
if the filter function allows.
(filter_equal): No special case test for objects that are strings.
Just put them through the filter.
* filter.h (filter_string): Declaration updated.
* match.c (format_field, subst_vars, v_filter): Follow rename.
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* filter.c (tonumber_k, tointeger_k, tofloat_k, hextoint_k):
New keyword variables.
(filter_init): New variables initialized; new filters registered.
* filter.h (tonumber_k, tointeger_k, tofloat_k, hextoint_k):
Declared.
* lib.c (num_str): New function.
* lib.h (num_str): Declared.
* txr.1: New filters documented.
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so we make the second one optional.
* filter.c (topercent_k, frompercent_k): New keyword
variables.
(url_encode, url_decode): Take a second parameter, space_plus.
This determines whether or not to apply the rule that
a space encodes as a + character.
(filter_init): Initialize new keyword variables, and register :topercent
and :frompercent filters. Fix the previous registrations of :tourl and
:fromurl using currying.
* filter.h (urlencode, urldecode): Declarations updated.
(topercent_k, frompercent_k): Declared.
* txr.1: Documented.
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* eval.c (eval_init): New intrinsic functions: url-encode, url-decode.
* filter.c (tourl_k, fromurl_k): New keyword variables.
(is_url_reserved, digit_value): New static functions.
(url_encode, url_decode): New functions.
(filter_init): Intialize new keyword variables and register
new :tourl and :fromurl filters.
* filter.h (tourl_k, fromurl_k, url_encode, url_decode): Declared.
* txr.1: Updated.
* txr.vim: Likewise.
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* arith.h: Likewise.
* debug.c: Added copyright header.
* debug.h: Updated copyright year.
* eval.c: Likewise.
* eval.h: Likewise.
* filter.c: Likewise.
* filter.h: Likewise.
* gc.c: Likewise.
* gc.h: Likewise.
* hash.c: Likewise.
* hash.h: Likewise.
* lib.c: Likewise.
* lib.h: Likewise.
* match.c: Likewise.
* match.h: Likewise.
* parser.h: Likewise.
* regex.c: Likewise.
* regex.h: Likewise.
* stream.c: Likewise.
* stream.h: Likewise.
* txr.c: Likewise, and e-mail address.
* txr.h: Updated copyright year.
* unwind.c: Likewise.
* unwind.h: Likewise.
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(function_filter): Use :fun keyword symbol instead of fun.
(filter_init): New keyword variable initialized.
* filter.h (upcase_k, downcase_k, fun_k): Declared.
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* filter.c (filter_equal): Takes two filters instead of one.
(lfilt_k, rfilt_k): New keyword variables.
(filter_init): New keyword variables initialized.
* filter.h (filter_equal): Declaration updated.
(lfilt_k, rfilt_k): Declared.
* lib.c (funcall4): New function.
(do_curry_1234_34): New static function.
(curry_1234_34): New function.
(do_swap_12_21): New static function.
(swap_12_21): New function.
* lib.h (funcall4, curry_1234_34, swap_12_21): Declared.
* match.c (dest_bind): Swap use the function argument swapping
combinator when calling tree find such that the value
being searched is on the left and pattern material is on the right.
(v_bind): Implemented :lfilt and :rfilt.
* txr.1: Documented :lfilt and :rfilt.
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is not necessarily a trie.
(string_filter, compound_filter): New functions.
(get_filter): Recognize a compound filters and return a function
which implements it.
* filter.h (get_filter_trie): Declaration renamed.
* match.c (format_field, v_bind, v_output): Follow get_filter_trie
rename. Error message text updated.
* txr.1: Describe compound filters.
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* filter.c (filter_equal): New function.
(upcase_k, downcase_k): New keyword variables.
(filter_init): New keyword variables initialized,
and new upcase and downcase filters registered.
* filter.h (filter_equal): Declared.
* lib.c (tree_find): Takes new argument, the equality test function.
(upcase_str, downcase_str): New functions.
(do_curry_123_23): New static function.
(curry_123_23): New function.
* lib.h (tree_find): Declaration updated.
(upcase_str, downcase_str, curry_123_23): Declared.
* match.c (dest_bind): Updated to take equality function.
Uses it and passes it down to tree_find.
(v_bind): Filter feature implemented.
(h_var, v_try): Add equal_f to dest_bind argument list.
* txr.1: Updated to describe new filters and bind arguments.
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hash.h, lib.c, lib.h, match.c, match.h, parser.h, parser.l, parser.y,
regex.c, regex.h, stream.c, stream.h, txr.1, txr.c, txr.h, unwind.c,
unwind.h, utf8.c, utf8.h: Updated e-mail address.
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Bugfix in @(throw) when non-symbol is thrown: exception message
referred to the symbol throw rather than the erroneous object.
* filter.c (build_filter_from_list, register_filter): New functions.
* filter.h (register_filter): New function declared.
* lib.c (deffilter_s): New variable defined.
(chain): Function changed from single list argument to variable
argument list to reduce the complexity of use.
(do_and, and): New functions.
(obj_init): deffilter_s initializatio added.
* lib.h (deffilter_s, and): New declarations.
(chain): Declaration updated to new function signature.
(eq): Changed from macro to inline function.
* match.c (do_output_line): Simplified expression involving chain.
(do_output): Likewise.
(match_files): Bugfix in error handling of throw.
Implementation of deffilter.
* txr.1: Documented deffilter.
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* filter.c (from_html_k): New variable.
(to_html_table): New static array.
(filter_init): Intern new symbol. Instantiate new filter
and store in filters hash.
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* filter.c, filter.h: New files.
* Makefile (OBJS): filter.o added.
* gc.c (mark_obj): Mark new alloc field of string objets.
* hash.c (struct hash): New member, userdata.
(hash_mark): Mark new userdata member of hash.
(make_hash): Initialize userdata.
(get_hash_userdata, set_hash_userdata, hashp): New functions.
* hash.h (get_hash_userdata, set_hash_userdata, hashp): New functions
declared.
* lib.c (getplist, string_extend, cobjp): New functions.
(string_own, string, string_utf8): Initialize new alloc field to nil.
(mkstring, mkustring): Initialize new alloc field to actual size.
(length_str): When length is computed and cached, also compute
and cache alloc.
(init): Call filter_init.
* lib.h (string string): New member, alloc.
(num_fast): Macro converted to inline function.
(getplist, string_extend, cobjp): New functions declared.
* match.c (match_line): Follows change of modifier s-exp syntax.
(format_field): New parameter, filter.
New modifier syntax parsed. Filter retrieved, and applied.
(subst_vars): New parameter, filter. Filter is either applied
in this function or passed to format_field, as needed.
(eval_form): Pass nil to new parameter of subst_vars.
(do_output_line): New parameter, filter. Passed down to subst_vars.
(do_output): New parameter, filter. Passed down to do_output_line.
(match_files): Pass nil filter to subst_vars in cat directive.
Output directive refactored to parse keywords, extract the
filter and pass down to do_output.
* parser.y (regex): Generate (sys:regex regex syntax ...)
instead of (regex syntax ...).
(elem, expr): Updated w.r.t. regex syntax change.
(var): Cases '{' IDENT regex '}' and '{' IDENT NUMBER '}'
are removed. new syntax '{' IDENT exprs '}' to handle these
more generally and allow for keywords.
* txr.1: Updated.
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