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* stdlib/compiler.tl (compiler comp-arith-form): There is no
need here to pass the form through reduce-constant, since
we are about to divide up its arguments and individualy reduce
them, much like what that function does.
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Commit c8f12ee44d226924b89cdd764b65a5f6a4030b81 tried to fix
an aspect of this problem. I ran into an issue where the try
code produced a D register as its output, and this was
clobbered by the catch code. In fact, the catch code simply
must not clobber the try fragment's output register. No matter
what register that is, it is not safe. A writable T register
could hold a variable.
For instance, this infinitely looping code is miscompiled
such that it terminates:
(let ((x 42))
(while (eql x 42)
(catch
(progn (throw 'foo)
x)
(foo () 0))))
When the exception is caught by the (foo () 0) clause
x is overwritten with that 0 value.
The variable x is assigned to a register like t13,
and since the progn form returns x as it value, it
compiles to a fragment (tfrag) which indicates t13
as its output register.
The catch code wrongly borrows ohis as its own output
register, placing the 0 value into it.
* stdlib/compiler.tl (compiler comp-catch): Get rid of the
coreg local variable, replacing all its uses with oreg.
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The compiler is lifting top-level lambdas, such as those
generated by defun, using the load-time mechanism. This has
the undesireable effect of unnecessarily placing the lambdas
into a D register.
* stdlib/compiler.tl (*top-level*): New special variable.
This indicates that the compiler is compiling code that
is outside of any lambda.
(compiler comp-lambda-impl): Bind *top-level* to nil when
compiling lambda, so its interior is no longer at the
top level.
(compiler comp-lambda): Suppress the unnecessary lifting
optimization if the lambda expression is in the top-level,
outside of any other lambda, indicated by *top-level* being
true.
(compile-toplevel): Bind *top-level* to t.
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* stdlib/compiler.tl (compile-toplevel): Recently, I removed
the binding of *load-time* to t from this function. That is
not quite right; we want to positively bind it to nil. A new
top-level compile starts out in non-load-time. Suppose that
some compile-time evaluation recurses into the compiler.
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The checks for native Windows are incorrect, plus there
are some issues in the path-volume function.
We cannot check for native Windows at macro-expansion time simply by
calling (find #\\ path-sep-chars) because we compile on Cygwin where
that is false. What we must do is check for being on Windows at
macro-expansion time, and then in the "yes" branch of that decision, the
code must perform the path-sep-char test at run-time. In the "no"
branch, we can output smaller code that doesn't deal with Windows.
* stdlib/copy-file.tl (if-windows, if-native-windows): New macro, which
give a clear syntax to the above described testing.
(path-split): Use if-native-windows.
(path-volume): Use if-native-windows. In addition, fix some broken
tests. The tests for a UNC path "//whatever" cannot just test that the
first components are "", because that also matches the path "/".
It has t be that the first two components are "", and there are more
components. A similar issue occurs in the situation when there is
a drive letter. We cannot conclude that if the component after the
drive letter is "", then it's a drive absolute path, because that
situation occurs in a path like "c:" which is relative.
We also destructively manipulate the path to splice out the volume
part and turn it into a simple relative or absolute path. This is
because the path-simplify function deosn't deal with the volume prefix;
its logic like eliminating .. navigations from root do not work if the
prefix component is present.
(rel-path): We handle a missing error case here: one path has volume
prefix and the other doesn't. Also the error cases that can only occur
on Windows are wrapped with if-windows to remove them at compile time.
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* stdlib/match.tl (compile-match): Handle
the (sys:expr (sys:quasi ...)) case by recursing on
the (sys:quasi ...) part, thus making them equivalent.
This fixes the newly introduced broken test cases, and meets
the newly documented requirements.
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* stdlib/pic.tl (insert-commas): Use ifa to bind the
anaphoric variable it to [num (pred i)]. With the new
ifa behavior involving read-place, this now prevents
two accesses to the array.
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* stdlib/ifa.tl (ifa): When the form bound to the it
anaphoric variable is a place, such that we use placelet,
wrap the place in (read-once ...) so that multiple
evaluations of it don't cause multiple accesses of the
place.
* txr.1: Documented.
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* lisplib.c (place_set_entries): Trigger autoload on
read-once.
* stdlib/place.t (read-once): New function and place.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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This function includes the 1.0 value excluded by random-float.
* rand.c (random_float_incl): New static function.
(rand_init): Register random_float_incl intrinsic.
* txr.1: Document, and add discussion about uniformity requirements
and what they mean and do not mean.
* stdlib/doc-syms.tl: Updated.
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* stdlib/compiler.tl (compiler optimize): After the dataflow-driven
peephole optimization, call elim-dead-code again.
* stdlib/optimize.tl (basic-blocks check-bypass-empty): New method.
(basic-bocks elim-dead-code): After eliminating unreachable blocks
from the list, we use check-bypass-empty to squeeze out any
empty blocks: blocks that have no instructions in their list,
other than the leading label. This helps elim-next-jmp
to find more opportunities to eliminate a wasteful jump, because
sometimes these jumps straddle over empty blocks.
Furthermore, elim-next-jmp can generate more empty blocks itself;
so we check for this situation, delete the blocks and iterate.
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* stdlib/optimize.tl (basic-blocks elim-dead-code): When
clearing the links before recalculating the graph, also clear
the next field of every block, because link-graph only sets
this if necessary, assuming that the value is already nil.
Thus by not resetting it, we risk leaving stale values in
these .next fields. The code reachability calculation relies
on next fields, so if they falsely point to dead blocks, those
blocks could be falsely retained.
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* stdlib/compiler.tl (usr:compile-toplevel): Do not
bind *load-time* to t at the top level. The idea behind this
binding was to treat load-time as a transparent form that does
nothing if it occurs in the top-level since the top-level is
already at load-time. However, this is problematic because it
breaks the expectation that load-time calculations are
factored out of a form and done prior to its evaluation, even
if that form is top-level.
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The immediate problem is that with-dyn-lib creates a defvarl,
but deffi uses load-time forms to refer to that. In compiled
code, these load-time evaluations will occur before the
defvarl exists. The conceptual problem is that with-dyn-lib
might not be a top-level form. It can be conditionally
executed, as it happens in stdlib/doc-syms.tl, which is now
broken. Let's not use load-time, but straight lexical
environments.
* stdlib/ffi.tl (with-dyn-lib): Translate to a simple let
which binds sys:ffi-lib as a lexical variable.
(sys:with-dyn-lib-check): Use lexical-var-p to test what
sys:ffi-lib is lexically bound as a variable.
(deffi, sys:deffi-cb-expander): Instead of gloval defvarl
variables, bind the needed pieces to lexical variables,
placing the generated defun into that scope.
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* stdlib/copy-file.tl (path-simplify): If the incoming path's
first component is "", it is absolute; in that case swallow
any components that go above.
* tests/018/path-equal.tl: Uncomment two previously failing
tests.
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* pic.tl (add-neg-parens): New system function.
(expand-neg-parens): New macro.
(expand-pic): New numeric pattern with parentheses.
Also suport escaping of parentheses.
(pic): Recognize parenthesized numeric pattern here also.
* tests/018/format.tl: New tests.
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* stdlib/pic.tl (comma-positions): Must also look for ! point
if the . point is not found.
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* pic.tl (expand-pic-num): If the overflowing field specifies
a decimal point other than in the rightmost position, then
stick one into the fill pattern. The motivation for this is
that it harmonizes with the digit separators. The new digit
separator insertion logic will treat the # characters like
digits, and requires the embedded decimal in order to work
properly. Allowing digit separation to work in the fill
pattern will make for better looking output in column
displays. That's the same reason why we insert digit
separators among leading zeros.
* tests/018/format.tl: Overflow test cases updated in
light of this requirement change.
* txr.1: Documented.
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* stdlib/doc-syms.tl: Updated.
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This allows for pic patterns like #,###,###.###
which incorporate digit separating commas into the output.
* stdlib/pic.tl (comma-positions, insert-commas,
expand-pic-num-commas): New system functions.
(expand-pic): Recogize comma as a character which can be
escaped using the tilde. Recognize a more complicated numeric
pattern with commas. If the matched token contains commas,
treat it using expand-pic-num-commas.
(pic): Propagate a copy of the new numeric pattern here, where
it is used for separation into tokens.
* txr.1: Documented.
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* stdlib/quips.tl: New quips about rights, Lisp smugness, macros
and Reddit.
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* stdlib/copy-file.tl (path-equal): This function is based on
rel-path and so suffers the same bugs. Retarget it to use the
new functions and approach to volumes from rel-path, so it
benefits from the fixes.
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The first bug is that we are using the spl function with
pat-sep-chars. But spl does not take a set of characters; we
need the sspl function. Other bugs are handling drive letters
or UNC paths properly on Windows.
* stdlib/copy-file.tl (path-split, path-volume): New
functions.
(rel-path): Split path properly. Diagnose for all bad
combinations of mismatching absolute/relative paths
with or without a volume or incompatible volumes.
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* lisplib.c (copy_file_set_entries): Add path-equal to autoload symbols.
* stdlib/copy-file.tl (path-equal): New function.
* tests/018/path-equal.tl: New file.
* txr.1: Documented.
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* stdlib/copy-file.tl (path-simplify): New function.
(rel-path): Get rid of macrolet by using macro-time
expression; remove flet since canon is now path-simplify at
the top level. Fix diagnostic.
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* RELNOTES: Updated.
* configure (txr_ver): Bumped version.
* stdlib/ver.tl (lib-version): Bumped.
* txr.1: Bumped version and date.
* txr.vim, tl.vim: Regenerated.
* protsym.c: Likewise.
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* stdlib/awk.tl (sys:awk-compile-time): Slot field-names renamed to
field-name-conv.
(sys:awk-expander): Parse the new syntax which allows (sym fn)
pairs with optional fn, creating a list of normalized items
in the field-name-conv slot of the compile-time structure.
(sys:awk-symac-let): Adjust the code to the pair representation in
field-name-conv.
(sys:awk-field-name-code): New function for generating the
field conversion code.
(awk): Now that we have two optional pieces of code to wrap around
p-actions form, we factor that out of the awk-lambda, to a series
of conditional assignments. Here we handle the generation of the
field conversionns.
* conv.tl (sys:conv-expand-sym): New macro, used in
sys:awk-field-name-code and sys:conv-let.
(sys:conv-let): Simplify with sys:conv-expand-sym. Drop optional
argument from i; it connects with no documented feature, and is
not usable from fconv.
* tests/015/awk-fields.tl: New tests.
* txr.1: Updated, including cruft in fconv documentation.
Change-Id: Ie42819f58af039fdbcdb1ae365c89dc1add55c93
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* ffi.c (cptr_carray): New function.
(ffi_init): Register cptr-carray intrinsic.
* ffi.h (cptr_carray): Declared.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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* stdlib/awk.tl (sys:awk-compile-time): New slot, field-names.
(sys:awk-expander): Validate and store field-names into compile-time
structure.
(sys:awk-symac-let): New macro.
(awk): Wrap sys:awk-symac-let around code to generate field
name macros.
* tests/015/awk-fields.tl: New file.
* txr.1: Documented.
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* stdlib/optimize.tl (basic-block peephole-block): In a few more
cases, we should be setting the recalc flag to recalculate liveness,
and adding some block to the rescan list.
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* stdlib/optimize.tl (basic-blocks peephole-block): Rearrange the code a
bit so we don't calculate the xbl, which potentially performs the
cut-block, if there is no ybl. We set the bb.recalc flag since we may
have cut a block into two and have redirected a jump, and also
update the links for that reason.
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* stdlib/optimize.tl (basic-blocks thread-jumps-block,
basic-blocks peephole-block): Streamline various cases of [bb.hash
jlabel] being wastefully called twice to look up the same block
referenced by the same label.
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The next-block method performs a linear search through the basic
block list, which is physically ordered, to find the physically
next block. This is actually not needed in several places that use the
method; they want the logically next block, which is nil if the last
instruction of the current doesn't potentially fall through to the next
block. In the one place where we need the physical next block, in the
elim-next-jump method, the caller can dynamically provide this, since it
walks the list.
* stdlib/optimize.tl (basic-block next-block): Method removed.
(basic-block link-graph): We revise the logic here a little bit. All of
the cases now consistently use the mechanism of setting link-next to
nil to indicate that they don't fall through to the next block.
The special case handling of the close instruction is clearer.
(basic-block (thread-jumps-block, peephole-block)): Several cases here
referred to the physically next block via the next-block method. This
can be replaced by just using the next pointer, which will be the same.
(basic-blocks elim-next-jump): This method now takes the next block as
an argument, since there is no next-block method it can call to get
the physcally next block. The argument is guaranteed non-null, so we
don't need the .? null-safe slot access syntax.
(basic-blocks elim-dead-code): Iterate over the next blocks
simultaneously, and pass the next block into elim-next-jump.
We no longer iterate over the last block, which has no physical next
block.
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* stdlib/optimize.tl (basic-blocks join-block): Merge set
forms into one.
(basic-blocks elim-dead-code): Likewise.
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* stdlib/optimize.tl (basic-blocks link-graph): Do not search
the entire list for a block's successor. Iterate over the cdr
of the list in parallel, so that the next block is directly
available at each iteration.
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* stdlib/optimize.tl (basic-blocks thread-jumps-block): There
can't be any instructions in a basic block after an if or ifq,
so in these cases, jrest is always nil. Let's ignore that nil
efficiently with @nil, and get rid of the cut-block branches
of the code. There is a similar case in peephole-block, but
the target of the jump is an (end ...) which doesn't
necessarily end a basic block. I temporarily put in an (assert
(null jrest)), and, surprisingly, it never went off during a
rebuild of the library or running of the test case. Still,
only a jend ends a basic block; it would not be correct to
simplify it like these two cases in thread-jumps-block.
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When a jmp instruction is removed from (necessarily) the end of a basic
block, that basic block can be merged with the next one, and marked for
re-scanning.
A test case where this eliminates wasteful register-register move
instruction is (match #(@a) #(3) a).
* stdlib/optimize.tl (basic-blocks): New slot, tryjoin.
(basic-blocks join-block): Null out the instruction list of the joined
block. This helps if we do this during peephole processing, because it
happens in the middle of an iteration over a list of blocks which can
still visit the next block that has been merged into its predecesor; we
don't want to be processing instructions that are no longer relevant.
(basic-blocks peephole-block): In the one case where a conditional
instruction is deleted from the end of the basic block, we add the block
to the rescan list, and also to the tryjoin list. If the block can
be merged with the next one, that can create more opportunities for
peephole optimization.
(basic-blocks peephole): Use zap in a few places to condense the logic
of sampling a state variable that needs to be nulled out. Add the
processing of the tryjoin list: pop basic blocks from the list, and try
to merge them with their successor, if possible. We handle cases here
where the next block could itself be in tryjoin. Also, if we join any
blocks, we set the recalc flag to recalculate the liveness info.
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* stdlib/optimize.tl (basic-blocks peephole-block): When we match a
branching instruction, including jend, we know that's the end of the
basic block. So there is no need to splice the (rest insns) into
the output; let's get rid of that. On the other hand, there is also no
need to have a specific pattern match for the end of the list such
as ((jmp @label)). This costs extra cycles to validate. Let's
consistently match these basic-block terminating instructions using
prefix patterns like ((jmp @label) . @nil)).
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* quips.tl: New quip.
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This specifies the environment to be used for executing
programs.
* stream.c (open_subprocess, run): Check *child-env* variable and if
other than t, then install the environment before execvp.
In the spawn-based version of run, we save and restore the
environment around the spawn call, if *child-env* is in
effect.
* sysif.c (child_env_s): New symbol variable.
(exec_wrap): If *child-env* is other than t, then save the
environment in a list, and install the specified environment
before calling execvp. If that function returns, restore the
environbment.
* sysif.h (child_env_s): Declared.
(child_env): New macro.
* tests/018/process.tl: New tests.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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Using this new function together with env, it's now possible
to save the set of environment variables, clobber it to a
specified set (possibly empty) and then restore it.
Useful for improved security in running child processes.
* lib.[ch] (chk_substrdup_utf8): New function.
* sysif.c (replace_env): New function.
(sysif_init): Register replace-env intrinsic.
* sysif.h (replace_env): Declared.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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The various accessibility functions like path-writable-to-me
should use the real credentials, the same way that the
POSIX access function does. This makes them much more useful
and secure in setuid programs, since they answer the question
"does the underlying user, without these elevated privileges,
have this access".
* stdlib/path-test.tl (path-mine-p): Use getuid, not geteuid.
(path-my-group-p): Use getgid, not getegid.
(sys:path-access, path-private-to-me,
path-strictly-private-to-me): Use getuid, getgid and
rename euid variable to uid.
* txr.1: Updated.
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The new function:
- just returns the name if it contains path name components.
- returns nil if the name is "." or "..".
- tests for existence only, not permission to execute.
* lisplib.c (path_test_set_entries): Do not auto-load path-test
module on the path-search symbol, since it is no longer implemented
there.
* stdlib/path-test.tl (path-search): Function removed.
* stream.c (path_var_sep_char): New global variable.
(path_search): New function.
(detect_path_separators): Also set path_var_sep_char to semicolon
on Cygnal.
(stream-init): Register path-search intrinsic here now.
* stream.h (path_var_sep_char, path_search): Declared.
* tests/018/path-test.tl: New tests.
* txr.1: Documentation revised for path-search.
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* lisplib.c (arith_each_instantiate, arith_each_set_entries): New
functions.
(each_prod_set_entries): Add sum-each-prod, sum-each-prod*,
mul-each-prod and mul-each-prod* as autoload triggers for
each-prod.tl, where those macros are now defined.
(lisplib_init): Register autoloading of arith-each.tl via the
two new functions.
* stdlib/arith-each.tl: New file.
* stdlib/each-prod.tl (sys:expand-each-prod*): Handle sum-each-prod* and
mul-each-prod* in the same way, by mapping to their parallel binding
counterparts.
(sys:expand-arith-each-prod): New function.
(sym-each-prod, mul-each-prod, sum-each-prod*, mul-each-prod*): New
macros.
* tests/016/arith.tl: New tests.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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* Makefile (psquare.o): New object file.
* arith.c (psq_ops): New static structure.
(quant_fun): New static function.
(quantile): New function.
(arith_init): Register quantile intrinsic.
* arith.h (quantile): Declared.
* psquare.c, psquare.h: New files.
* tests/016/arith.tl: New tests.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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* stdlib/compiler.tl (compiler comp-fun-form): Reduce
single-argument logior and logand calls to just the argument.
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* stdlib/defset.tl (set-mask, clear-mask): New update macros.
* stdlib/optimize.tl (calc-liveness): Use the new macros.
* stdlib/socket.tl (sys:str-inaddr-net-impl, str-in6addr-net):
Same.
* stdlib/termios.tl (set-iflags, set-oflags, set-cflags,
set-lflags, clear-iflags, clear-oflags, clear-cflags,
clear-lflags): Same.
* lisplib.c (defset_set_entries): Add set-mask and clear-mask
to autoload symbols for defset.
* txr.1: Documented.
* stdlib/doc-syms.tl: Updated.
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At optimization level 2 or higher, an issue occurs whereby
code generation exhibits instabilities. The same code is
compiled slightly differently (but not incorrectly) depending
on irrelevant circumstances, due to some different registers
being used.
* stdlib/compiler.tl (compiler eliminate-frame): Do not free
the newly allocated t-registers inside a dohash loop.
We have a separate list of them in order; just hand that off
to free-tregs. The dohash loop is not ordered, because it
traverses a hash, which is keyed by object identities; i.e.
machine addresses assigned by memory allocation.
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The new sock-opt and sock-set-opt functions are wrappers around
getsockopt and setsockopt, respectively.
All POSIX socket options are registered. Platform-specific
options may be added in the future.
* ffi.c (sock_opt, sock_set_opt): New functions.
(ffi_init): Register sock-opt, sock-set-opt, sol-socket,
ipproto-ip, ipproto-ipv6, ipproto-tcp, ipproto-udp,
so-acceptconn, so-broadcast, so-debug, so-dontroute, so-error,
so-keepalive, so-linger, so-oobinline, so-rcvbuf, so-rcvlowat,
so-rcvtimeo, so-reuseaddr, so-sndbuf, so-sndlowat, so-sndtimeo,
so-type, ipv6-join-group, ipv6-leave-group, ipv6-multicast-hops,
ipv6-multicast-if, ipv6-multicast-loop, ipv6-unicast-hops,
ipv6-v6only, tcp-nodelay.
* lisplib.c (sock_set_entries): Add sock-opt and sock-set-opt.
* stdlib/socket.tl (sock-opt): Define as syntactic place.
* tests/014/socket-misc.tl: New cases, for sock-opt.
(set-and-get): New macro.
* txr.1: Documented. Also, mention that sock-bind enables
so-reuseaddr.
* stdlib/doc-syms.tl: Updated.
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* stdlib/socket.tl (sock-peer): Remove excess apostrophe in
getter.
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