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* When typing nEBfilename$ (n != 0) you would find out that the construct is invalid
only after typing out the entire command.
We now throw an error immediately, ie. only Escape or string termination will be expected
in interactive mode.
* In batch mode, nothing should have changed.
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launcher command (e.g. wine or wine64)
* This can be used for bootstrapping Windows binaries cross-compiled on FreeBSD or Linux
without requiring a native build to be installed first.
It will also allow running the test suite under Wine.
While Linux allows registering Wine as the launcher via binfmt_misc,
on FreeBSD we have no choice than to use --with-launcher.
* Unfortunately, SciTECO cannot currently be properly built with versions running under Wine
and the test suite also fails.
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CI runner
These testcases can still be run with --valgrind on my PC.
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Should fix the freebsd14-sciteco CI job.
On the other hand, these test cases do run through on my workstation,
so we might want to disable them *only* when running via CI.
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statement
* this is a SciTECO extension - it's not in TECO-11
* Allows for select-case-like constructs with default-clauses as in
:Os.^EQa$
!* default *!
!s.foo!
!* ... *!
!s.bar!
!* ... *!
* Consistent with nOlabel0,label1,...$ if <n> is out of range.
Unfortunately this form of computed goto is not applicable when
"selecting" by strings or non-consecutive integers.
* In order to continue after the <:O> statement, we must keep the
program counter along with the label we were looking for.
At the end of the macro, the PC is restored instead of throwing
an error.
* Since that would be very inefficient in loops - where potentially
all iterations would result in rescanning till the end of the
macro - we now store a completed-flag in the goto table.
If it is set while trying to :O to an unknown label, we can
just continue execution.
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empty labels are ignored
* This has long been a TECO-11 incompatibility.
* The first label in a list has index 0, i.e. `1Ofoo,bar$` jumps to label `!bar!`.
Consequently 0 is also implied, so `Olabel$` continues to do what you expect.
* `0Ofoo$` was previously also jumping to `!foo!` which was inconsistent:
All invalid indexes should do nothing, i.e. execution continues after the go-to command.
* Fixed handling of empty labels as in `1Ofoo,,bar$` - execution should also continue
after the command.
This eases writing "default" clauses immediately after the go-to.
* The ED hook values now also begin at 0, so most existing ED hook macros should
continue to work.
* Similarily, the mouse events returned by -EJ also begin at 0 now,
so fnkeys.tes continues to work as expected.
* It's still very possible of course that this breaks existing code.
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* At least the MSVCRT does this by default, i.e. the translation mode of stdout
is not _O_BINARY.
* This broke piping through SciTECO with --stdin --stdout, as this relies on SciTECO's
builtin EOL normalization. Instead, you would get DOS linebreaks on output even if the
source stream contains only UNIX linebreaks.
* It would also break binary filters.
* It seems to be safe to print only LF also for regular stdio (help and error messages),
so I simply disaply the stdout (and stdin and stderr) EOL translation globally.
* Also fixes Troff warnings due to the .in preprocessor writing output with DOS linebreaks.
* Added a test case. All future platforms shouldn't perform any unexpected EOL translations
on output.
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special Q-registers ^Ax
* The unnamed buffer is also used for reading from --stdin, so you couldn't practically combine
--stdin with passing command-line arguments to macros.
* The old approach of passing command-line arguments via lines in the
unnamed buffer was flawed anyway as it wouldn't work with filenames containing LF.
This is just a very ancient feature, written when there weren't even long Q-reg names in SciTECO.
* You can now e.g. pipe into SciTECO and edit what was read interactively, e.g. `dmesg | sciteco -i`.
You can practically use SciTECO as a pager.
* htbl.tes is now a command-line filter (uses -qio).
* grosciteco.tes reads Troff intermediate code from stdin, so we no longer need
"*.intermediate" temporary files.
* added a getopt.tes test case to the testsuite.
* This change unfortunately breaks most macros accepting command-line arguments,
even if they used getopt.tes.
It also requires updating ~/.teco_ini - see fallback.teco_ini.
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* All test suite commands are now invoked with --quiet.
When having to check the stdout of the test runs, you now longer have to filter
"Info:" lines out or include them in the expout.
* Use expout to compare the outputs of the stdio commands instead of just
counting the number of output lines.
* The <EO> command check is simplified by doing the arithmetics in SciTECO.
* test the --stdin and --stdout options as well
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commands with multiple string arguments
* When `@`-modifying a command with several string arguments and choosing `{` as the alternative
string termination character, the parser would get totally confused.
Any sequence of `{` would be ignored and only the first non-`{` would become the termination character.
Consequently you also couldn't choose a new terminator after the closing `}`.
So even a documented code example from sciteco(7) wouldn't work.
The same was true when using $ (escape) or ^A as the alternative termination character.
* We can now correctly parse e.g. `@FR{foo}{bar}` or `@FR$foo$bar$` (even though the
latter one is quite pointless).
* has probably been broken forever (has been broken even before v2.0).
* Whitespace is now ignored in front of alternative termination characters as in TECO-64, so
we can also write `@S /foo/` or even
```
@^Um
{
!* blabla *!
}
```
I wanted to disallow whitespace termination characters, so the alternative would have been
to throw an error.
The new implementation at least adds some functionality.
* Avoid redundancies when parsing no-op characters via teco_is_noop().
I assume that this is inlined and drawn into any jump-table what would be
generated for the switch-statement in teco_state_start_input().
* Alternative termination characters are still case-folded, even if they are Unicode glyphs,
so `@IЖfooж` would work and insert `foo`.
This should perhaps be restricted to ANSI characters?
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`echo -n` is not POSIX and obviously not supported on Mac OS' standard shell.
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and also the CTRL+L immediate editing command
* ^W can be added to loops in order to view progress in interactive mode.
It also sleeps for a given number of milliseconds (10ms by default).
* In batch mode it is therefore the sleep command.
* Since CTRL+W is an immediate editing command, you will usually type it Caret+W.
ASCII 23 however will also be accepted.
* While ^W only updates the screen, you can force a complete redraw by pressing CTRL+L.
This is what most terminal applications use for redrawing.
It will make it harder to insert ASCII 12, but this is seldom necessary since it
is a form feed.
^L (ASCII 12 and the upcaret variant ) is still a whitespace character and therefore treated as a NOP.
* DEC TECO had CTRL+W as the refresh immediate editing command.
Video TECO uses <ET> as a regular command for refreshign in loops.
I'd rather keep ET reserved as a potential terminal configuration command
as in DEC TECO, though.
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* DEC TECO had an <EO> command.
In contrast to DEC TECO's implementation, the value reported by
<EO> encodes a major.minor.micro semantic version.
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partially replaces ^B
* :^H and ::^H now return the timestamps, while ^B only returns the date.
* Pressing CTRL+H will rubout, so you will usually write it in upcaret mode.
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stdin or the user
* n:^T always prints bytes (cf. :^A)
* ^T without arguments returns a codepoint or byte from stdin.
In interactive mode, this currentply places a cursor in the message line and waits for a keypress.
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In particular, fixes the test case `3<255=>` which would print
only one number in interactive mode.
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causing assertions when entering interactive mode
Also added a regression test case.
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* When writing UTF-8, we must first peek in reverse order since we can
only write from left to right.
* When writing in raw ANSI, we can immediately pop the values from the stack
but must write in reverse.
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* Practically all calls to teco_expressions_args() must be preceded by teco_expressions_eval().
* In code paths where we know that teco_expressions_args() > 0, it is safe
to call teco_expressions_pop_num(0) instead of teco_expressions_pop_num_calc().
This is both easier and faster.
* teco_expressions_pop_num_calc() is for simple applications where you just want to get
a command argument with default (implied) values.
Since it includes teco_expressions_eval(), we can avoid superfluous calls.
* -EC...$ turned out to be broken and is fixed now.
A test case has been added.
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current buffer
* refactored some code that is common with Xq into teco_get_range_args().
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* Greatly improved usability as a scripting language.
* The command is in DEC TECO, but in contrast to DEC TECO, we also
support string building constructs in ^A.
* Required some refactoring: As we want it to write everything verbatim
to stdout, the per-interface method is now teco_interface_msg_literal()
and it has to deal with unprintable characters.
When displaying in the UI, we use teco_curses_format_str() and TecoGtkLabel
functions/widgets to deal with possible control codes.
* Numbers printed with `=` have to be written with a trailing linefeed,
which would also be visible as a reverse "LF" in the UI.
Not sure whether this is acceptable - the alternative would be to strip
the strings before displaying them.
* Messages written to stdout are also auto-flushed at the moment.
In the future we might want to put flushing under control of the language.
Perhaps :^A could inhibit the flushing.
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* These are famously in DEC TECO-11, but also in Video TECO.
* The implementation is tricky. They need to use lookahead states,
but this would be inacceptable during interactive execution.
Therefore only if executing from the end of the command line
`==` and `===` are allowed to print multiple values.
The number is therefore also not popped form the stack immediately
but only peeked. It's popped only when it has been decided that
the command has ended.
* This may break existing macros that use multiple `=` in a row
to print multiple values from the stack.
You will now e.g. have to insert whitespace to separate such `=` commands.
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$$ into the commandline
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support the append operation (:Xq, :^Uq...)
Works via a default implementation in the "external" Q-register "class"
by first querying the string, appending and re-setting it.
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* regression introduced in 2baa14add6d9976c29b27cf4470bb458a0198694
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* In this case we always save the given buffer and never the current Q-Register.
* The current Q-Register is only saved without any numeric argument.
The same semantics make sense for <EF> so that Q*EF closes the current buffer
even when editing a Q-Register.
* This variant is present in Video TECO.
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* Could be used to check whether the stack is currently empty,
although peeking would be cumbersome: `:]q"S [q !...! | !...! '`
* This is from DEC TECO-11.
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* These were leaked e.g. in case of end-of-macro errors,
but also in case of syntax highlighting (teco_lexer_style()).
I considered to solve this by overwriting more of the end_of_macro_cb,
but it didn't turn out to be trivial always.
* Considering that the union in teco_machine_main_t saved only 3 machine words
of memory, I decided to sacrifice those for more robust memory management.
* teco_machine_qregspec_t cannot be directly embedded into teco_machine_main_t
due to recursive dependencies with teco_machine_stringbuilding_t.
It could now and should perhaps be allocated only once in teco_machine_main_init(),
but it would require more refactoring.
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* This command exists in Video TECO.
In Video TECO it also supports reading multiple files with a glob pattern -- we do not support that
as I am not convinced of its usefulness.
* teco_view_load() has been extended, so it can read into dot without
discarding the existing document.
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* ED hooks are not executed in this case
* <EF> is now allowed even when editing a Q-Reg, unless you try to close the
current buffer
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* It is encoded with the same formula as on VAX/VMS on TECO-11, on TECOC and TECO-64.
* As an extension, when colon-modified it returns the number of seconds since the epoch.
It might be even more useful to return the microseconds since the epoch, but that would require
64-bit integers, which can theoretically be disabled at build time.
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codepoints in a strtoul()-like manner
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* We must call teco_interface_bytes2glyphs() only ever with byte offsets
that already exist in the buffer.
* regression, introduced in aaa1d51a4c85fcc627e88ef7cf5292d9c5f5f840
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* Previously, deleting text after a text match or insertion
could result in wrong ^S/^Y results.
In particular, the amount of characters deleted by <FD> at the end of a buffer
couldn't be queried.
* This also fixes the M#rf (reflow paragraph) macro.
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* This is not in Video TECO, but TECO-11 has a search-and-replace variant of <N>.
<N> however is a search-over-page-boundary command in TECO-11, which has been repurposed
as search-over-buffer-boundary in Video TECO and SciTECO.
* <N> and <FN> no longer call the edit hook after *every* invocation, but only
if the current buffer changes. This is not really relevant with the current
default hook from fallback.teco_ini, but might be depending on the use case.
* Added testcases both for <N> and <FN>.
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* The old behavior of throwing an error was inherited from Video TECO.
* The command is now more similar to TECO-11.
* Since -1 is taken, invalid and incomplete UTF-8 byte sequences
are now reported as -2/-3.
I wasn't really able to provoke -3, though.
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command now
* Improves DEC TECO-11 compatibility.
* <EM> is still supported as a synonym, but considered deprecated and is no longer documented.
A warning is printed when invoked.
It can be repurposed at any time in the future.
* `EI$` is not yet supported.
I am unsure whether this makes any sense.
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* This may break existing macros!
^C is now essentially a synonym for $$ and may not terminate the program
when called from a non-toplevel macro frame.
However it improves compatibility with TECO-11.
* In contrast to TECO-11, ^C^C (exit) can be typed completely in upcaret mode.
Otherwise it wouldn't have been possible to use the exit command in ASCII-only scripts.
* The implementation of ^C^C uses a lookahead state similar to ^[ (escape).
^C does not return immediately, but the following character determines whether it will
perform a return or exit.
It's one of the rare cases in SciTECO where this is possible and safe since
^C is also disallowed on the command-line to avoid undesired command-line terminations
after ^C interruptions.
(You can only use $$ to terminate the command-line interactively.)
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* Any value left on the numeric stack now determines the exit code.
This ensures you can call n^C as the SciTECO version of exit(n).
It will also work with n$$ in the top level macro.
But you don't necessarily need any of these commands.
* Could be useful in shell scripting as in
`sciteco -e "@EB/file/ :@S/foo/\"F1'"` to fail `foo` is not found.
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* Test cases where hard to read since there was a layer of shell and M4 escaping -- sometimes
with the help of quadrigraphs -- to preserve the original TECO characters.
* We introduced TE_CHECK() and TE_CHECK_CMDLINE() M4 macros which care about shell escaping
automatically.
* If all TECO code is double quoted with [[ and ]], single square and round brackets
are preserved as well.
* Only in case of using *unbalanced* single square brackets, you have to take action
and add `![!` or `!]!` TECO comments to balance them out.
This is still better than quadrigraphs.
* The $ESCAPE and $RUBOUT environment variables are replaced by equivalent
M4 macros, so they can be used with TE_CHECK_CMDLINE().
* Other references to shell variables have been resolved by exporting them
into the environment (as in the case of $srcdir) or by introducing
new M4 macros (TE_MAXINTxx, TE_MININTxx).
* The $WORDS_EXAMPLE variable has been got rid of by writing it into a temporary
file instead. There is some redundancy -- in principle an M4 macro could have also been used.
* This leaves only 6 remaining usages of AT_CHECK() for invoking SciTECO,
mainly for testing opener.tes, where we have to pass in command line arguments.
In theory most of them could be avoided as well by preparing the unnamed buffer appropriately.
However the way that command line parameters are passed will be changed sooner or later.
* This uses GNU M4 extensions, but Autoconf requires that anyway.
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replacement register (after `{`)
I found that terminating the command-line while editing the replacement register,
leaves you in a hard-to-recover state. You can/should no longer call `}`, so you would
have to go back to the last buffer (Q*U*).
Instead, this is now checked against and a test case has also been added.
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* When popping from the Q-Register stack to local Q-Registers in macro calls,
problems would arise when rubbing out that macro call since we would eventually restore
a pointer that has been permanently freed along with the local Q-Registers.
* Naturally this could result in everything from Valgrind warnings to crashes.
* Added test case.
* There is still a test case that fails when run under `--valgrind`,
but it's apparently due to a glib-internal memory leak.
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* After detecting +line[,column] constructs, the next argument is not parsed as a potential
filename:line[:column] construct.
* This code turned out to be tricky to get right, so I added a test case.
Standard library modules can well be checked in the test suite since
we have $SCITECOPATH pointing to the source tree's lib/ directory.
* Make sure that relevant variables from atlocal.in are really exported into the
process environment.
This was also broken for the Glib debug options.
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* It turns out that `bool` (_Bool) in bitfields may cause
padding to the next 32-bit word.
This was only observed on MinGW.
I am not entirely sure why, although the C standard does
not guarantee much with regard to bitfield memory layout
and there are 64-bit available due to passing anyway.
Actually, they could also be layed out in a different order.
* I am now consistently using guint instead of `bool` in bitfields
to prevent any potential surprises.
* The way that guint was aliased with bitfield structs
for undoing teco_machine_main_t and teco_machine_qregspec_t flags
was therefore insecure.
It was not guaranteed that the __flags field really "captures"
all of the bit field.
Even with `guint v : 1` fields, this was not guaranteed.
We would have required a static assertion for robustness.
Alternatively, we could have declared a `gsize __flags` variable
as well. This __should__ be safe since gsize should always be
pointer sized and correspond to the platform's alignment.
However, it's also not 100% guaranteed.
Using classic ANSI C enums with bit operations to encode multiple
fields and flags into a single integer also doesn't look very
attractive.
* Instead, we now define scalar types with their own teco_undo_push()
shortcuts for the bitfield structs.
This is in one way simpler and much more robust, but on the other
hand complicates access to the flag variables.
* It's a good question whether a `struct __attribute__((packed))` bitfield
with guint fields would be a reliable replacement for flag enums, that
are communicated with the "outside" (TECO) world.
I am not going to risk it until GCC gives any guarantees, though.
For the time being, bitfields are only used internally where
the concrete memory layout (bit positions) is not crucial.
* This fixes the test suite and therefore probably CI and nightly
builds on Windows.
* Test case: Rub out `@I//` or `@Xq` until before the `@`.
The parser doesn't know that `@` is still set and allows
all sorts of commands where `@` should be forbidden.
* It's unknown how long this has been broken on Windows - quite
possibly since v2.0.
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`a-b"=` idiom
* There might theoretically be problems with the uncommon one's complement or magnitude
representation of negative integers, but it's practically impossible to meet those in
the wild.
* Still, we do some checks now, so we will at least notice any exotic architectures.
* Also, documented the `a^#b"=` idiom for checking for equality.
It's longer to type, but faster and will also work for floats.
For floats it will be the only permissible idiom for checking for bitwise equality
as `a-b` can be 0 even if a!=b (if the difference is very small).
Changing the `-` semantics is out of the question.
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* In other words, fixed `-9223372036854775808\` on --with-teco-integer=64
(which is the default).
* The reason is that ABS(G_MININT64) == G_MININT64 since -G_MININT64 == G_MININT64.
It is therefore important not to call ABS() on arbitrary teco_int_t's.
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* Instead of separate stand-alone commands, they are now allowed only immediately
in front of the commands that accept them.
* The order is still insignificant if both `@` and `:` are accepted.
* The number of colon modifiers is now also checked.
We basically get this for free.
* `@` has syntactic significance, so it could not be set conditionally anyway.
Still, it was possible to provoke bugs were `@` was interpreted conditionally
as in `@ 2<I/foo/$>`.
* Even when not causing bugs, a mistyped `@` would often influence the
__next__ command, causing unexpected behavior, for instance when
typing `@(233C)W`.
* While it was theoretically possible to set `:` conditionally, it could also
be "passed through" accidentally to some command where it wasn't expected as in
`:Ifoo$ C`.
I do not know of any real useful application or idiom of a conditionally set `:`.
If there would happen to be some kind of useful application, `:'` and `:|` could
be re-allowed easily, though.
* I was condidering introducing a common parser state for modified commands,
but that would have been tricky and introduce a lot of redundant command lists.
So instead, we now simply everywhere check for excess modifiers.
To simplify this task, teco_machine_main_transition_t now contains flags
signaling whether the transition is allowed with `@` or `:` modifiers set.
It currently only has to be checked in the start state, after `E` and `F`.
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* This was actually broken if the command is preceded by `@` and `:` characters, which
are __not__ modifiers.
E.g. `Q:@I/foo^W` would have rubbed out the `:` register as well.
* Also, since it was all done in teco_state_process_edit_cmd(),
it would also rub out modifier characters from within string arguments,
E.g. `@I/::^EQ^W`
* Real commands now have their own ^W rubout implementation, while the generic
fallback just rubs out until the start state is re-established.
This fails to rub out modifiers as in `@I/^W`, though.
* Real command characters now use the common TECO_DEFINE_STATE_COMMAND().
* Added test cases for CTRL+W rub out.
A few control characters are now portably available to tests
via environment variables `$ESCAPE`, `$RUBOUT` and `$RUBOUT_WORD`.
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* Added a test case for the known bug of out-of-place modifiers.
Well, this is a syntactic shortcoming rather than a true bug.
But I did run into it more than once.
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