a1dcfcacf37254bb5e430a0bdba17ea366a9e9cc
63 Commits
| Author | SHA1 | Message | Date | |
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da50da70b5
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Bump libakgl to pick up the six defects this port filed
Records the filing in TODO.md section 7 alongside the FILTER gap, and names the four workarounds this repository carries against them -- the embedded-dependency CMake trick, the akgl/actor.h include ahead of akgl/controller.h, and the hand-populated render vtable with its NULL-deref hazard. Each is commented at its site with the words "filed upstream" so it can be found and deleted when the fixes land. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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4fc763efb3
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Wire the sink and the three devices to libakgl
src/sink_akgl.c, src/graphics_akgl.c, src/audio_akgl.c and src/input_akgl.c, in
the akbasic_akgl target, which is the only thing here that links SDL.
-DAKBASIC_WITH_AKGL=ON had never been configured in this repository before, and
it now builds and passes.
The sink is what section 3 has been waiting on. Its character grid comes from
akgl_text_measure(font, "A", &w, &h), the direct equivalent of the reference's
font.SizeUTF8("A") and the call that did not exist until 42b60f7. Wrapping is
done on the character grid rather than by handing SDL_ttf a wraplength, because
the cursor has to land somewhere definite: a program that PRINTs a long string
and then PRINTs again expects the second to start on the row after the first
ended, and only the code that placed the characters knows which row that is.
tests/akgl_backends.c draws into a 128x128 software renderer under the dummy
video driver and reads the pixels back -- the pattern deps/libakgl/tests/draw.c
established, which needs no display and no offscreen harness. It asserts the
seam rather than libakgl's own behaviour: a BASIC line in, a lit pixel of the
right colour out.
Four things in libakgl had to be worked around to get here. All four are
commented at their site with "filed upstream" and recorded in TODO.md section 3:
- An embedded libakgl requires SDL, SDL_image, SDL_mixer, SDL_ttf and jansson to
be *installed*. It builds its own vendored copies only when it is top-level,
and they are sitting right there in deps/libakgl/deps. Every lookup is guarded
with if(NOT TARGET ...), so this adds those five subdirectories before
add_subdirectory(deps/libakgl) -- the same trick and the same ordering
requirement akerror::akerror and akstdlib::akstdlib already need.
- akgl/controller.h does not compile on its own: it declares handlers taking an
akgl_Actor * and includes nothing that declares the type.
- There is no way to attach a 2D backend to a renderer you already have.
akgl_render_init2d() installs the vtable but also creates its own window and
writes the camera global, so it belongs to the akgl_game_init() path -- which
is exactly the path an embedding host is not on. The test assigns the six
pointers by hand.
- akgl_text_rendertextat() segfaults on a backend whose vtable is empty; it
reaches through renderer->draw_texture without checking it. Same class of
defect 42b60f7's own commit added a draw test for.
The sink's readline reports end of input rather than reading: a drawn text layer
is not a source of lines, and INPUT through one wants a line editor built on the
keystroke ring. EOF rather than an error is the contract sink.h states, so INPUT
already handles it. That editor is the next piece of work there.
70/70 core ctest with no SDL on the include path, 71/71 with the akgl suite,
clean under -Wall -Wextra, doxygen clean.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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83185bafa8
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Read the keyboard: implement GET, GETKEY and SCNCLR
The poll_key half of group E, against the akbasic_InputBackend record. The libakgl implementation behind it is akgl_controller_poll_key(), which drains a ring the library fills from SDL events the host pumps -- so the interpreter can answer "is there a key waiting" without owning an event loop, which is what goal 3 requires. GET and GETKEY differ in one way and it is the interesting one. GET takes whatever is there including nothing, and an empty buffer is success with the empty string rather than an error -- that is what happens on most iterations of every GET loop ever written, and upstream is explicit that its poll reports it the same way. GETKEY waits, and since the library may not block, waiting is spelled as holding the step loop: the verb sets a flag and akbasic_runtime_step() declines to advance until a key arrives. Every step still returns and a bounded run() still comes back, so a host keeps its frame rate; the program simply does not move past the GETKEY. The PLAY queue is serviced before that check on purpose -- music should keep playing while a program waits for a keypress. Withdrawing the input device while a GETKEY is holding releases it rather than wedging the script on a device that no longer exists. Both verbs accept an integer variable as well as a string one and give it the raw key code, which is what a program testing for cursor or function keys needs. No key is code zero, matching what a C128 reports. A float variable is refused: it is neither a character nor a code. SCNCLR goes through the text sink rather than a device, because the sink is where PRINT already goes and is the only thing that knows what a screen means for this host. The stdio sink treats it as a no-op; clearing a pipe means nothing. One thing worth knowing before writing any bounded-run test, and now commented in tests/input_verbs.c: source lines are stored indexed by line number and the cursor starts at zero, so a step is spent on each empty slot along the way. A program at line 10 needs eleven steps before it has run anything. 70/70 ctest, clean under -Wall -Wextra, doxygen clean. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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e24926d429
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Sound: implement the BASIC 7.0 sound verbs and the PLAY parser
SOUND, ENVELOPE, VOL, PLAY and TEMPO against the akbasic_AudioBackend record, plus FILTER, which is in the table only so that it can be refused with a reason. The PLAY note-string parser and TEMPO are here rather than in libakgl because that is where its audio commit says they belong: a tone generator synthesises pitches, but deciding that O4CDEFG is five quarter notes starting at middle C is a language question. PLAY does not block. On a C128 it holds the program until the last note ends, which section 1.6 forbids outright, so it parses the string into a fixed queue and returns; akbasic_runtime_step() releases one note at a time against whatever time the host last passed to akbasic_runtime_settime(). The driver now steps one at a time with the clock refreshed in between rather than making a single unbounded run() call -- a tune whose notes all measured themselves against a frozen zero would rush out at once. That loop is its own function because CATCH expands to a break and PASS expands to a return of the context, and main() returns an int; wrapping the loop is what the protocol prescribes for that shape. src/audio_tables.c holds the three conversions, laid out as tables because each is somewhere a wrong constant produces a plausible wrong pitch rather than an error anybody would notice. Two are transcriptions -- the SID frequency formula and its non-linear ADSR rate tables, where decay is exactly three times attack. The third is not: BASIC 7.0 never published what a whole note lasts at a given TEMPO, so 16000 ms at TEMPO 1 is a calibration choice putting a default quarter note at 120 bpm, and it is labelled as a choice where it is made. SOUND's frequency sweep is refused rather than faked, and filed upstream as akgl_audio_sweep. The only way to fake it here is to re-issue tones from step(), which ties audible pitch to how often the host calls us -- a tune that changes key with the frame rate. FILTER is refused for the reason upstream already gave: there is no filter stage and SDL3 has no primitive to build one from. The PLAY parser is tested through akbasic_play_parse() directly rather than through a program, because running one also runs the queue service -- and with the clock at zero every duration has already expired, so the queue empties before an assertion can look at it. Draining is correct behaviour and is tested on its own; the parse tests ask a different question. 68/68 ctest, clean under -Wall -Wextra, doxygen clean. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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9d99d0a67e
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Draw: implement the BASIC 7.0 graphics verbs
GRAPHIC, COLOR, DRAW, BOX, CIRCLE, PAINT, SCALE, SSHAPE, GSHAPE and LOCATE, all against the akbasic_GraphicsBackend record rather than akgl_draw_* directly, so src/runtime_graphics.c includes no SDL and the whole group is testable in a build with no SDL on the machine. The reference lists every one of these as unimplemented, so the semantics come from Commodore BASIC 7.0 rather than from a port, and four places where a modern renderer cannot do what a C128 did are recorded in TODO.md section 5 rather than silently substituted: - CIRCLE is drawn as a polygon of inc-degree segments and akgl_draw_circle is deliberately unused. 7.0's CIRCLE takes two radii, an arc range and a rotation, so the primitive could serve only the fully-defaulted call, and a shape that changed character depending on whether the radii happened to be equal would be worse than one uniformly a polygon. - SSHAPE puts a SHAPE:<n> handle in the string variable rather than the pixels, because a value's string is a fixed 256 bytes and a region is a device surface. GSHAPE refuses a string without that prefix instead of parsing whatever digits it finds and pasting an unrelated slot. - BOX fills on a negative angle; 7.0 puts the fill flag after the rotation, which would make a filled box a seventh argument. - GRAPHIC stores its mode and honours only the one consequence that means anything here -- mode 0 is text -- while still refusing an out-of-range mode, since that is a typo worth catching. PAINT surfaces the flood fill's AKERR_OUTOFBOUNDS as an error rather than success. The device gives up when its span stack runs out having filled *part* of the region, and a program that cannot tell that happened cannot recover from it. Note the shape of that handler: HANDLE sets handled = true on the context, so a FAIL_RETURN from inside the HANDLE block hands the caller something already marked handled, whose FINISH_LOGIC then declines to pass it up and releases it -- the error disappears and PAINT reports success. Flag inside the block, raise after FINISH. COLOR, LOCATE and SCALE need no device on purpose, so a program can set itself up before a host has lent it a renderer. Adds a second golden corpus under tests/language/. The corpus in deps/basicinterpret is a submodule and nothing here may add files to it, but goal 2's new verbs still need the .bas/.txt half of their coverage. Registered under local_ so a failure names which corpus it came from. What it can cover is limited -- these verbs draw rather than print -- so the behaviour that reaches a device is asserted against tests/mockdevice.h instead. 65/65 ctest, clean under -Wall -Wextra, doxygen clean. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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5077efc3a7
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Re-sequence the language queue now that libakgl closed the gaps
The bump in
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7f16337a16
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Bump libakgl to 42b60f7: every gap this port filed is now closed
All four capability gaps filed against libakgl have landed upstream, so nothing
in this repository is waiting on that library any more.
text measurement -> akgl_text_measure, akgl_text_measure_wrapped
immediate drawing -> akgl_draw_point/_line/_rect/_filled_rect/_circle/
_flood_fill/_copy_region/_paste_region
audio -> akgl_audio_init/_tone/_envelope/_waveform/_volume/
_stop/_voice_active/_mix
console input -> akgl_controller_poll_key, akgl_controller_flush_keys
The signatures came back close to what was filed, and two details are worth
recording for whoever writes src/sink_akgl.c next. The draw calls take an
akgl_RenderBackend * as their first argument rather than reaching for a global
renderer, which fits goal 3's rule that the interpreter draws through whatever
renderer the host already initialized. And the audio API is a synthesised-voice
one -- a tone on a numbered voice plus a separate ADSR envelope -- which is the
shape PLAY and ENVELOPE actually need, rather than the sample playback
SDL3_mixer would have offered.
Checked rather than assumed: libakgl's status band is still 256-260, so the
coordinated range map in CLAUDE.md is unaffected and akbasic's 512-767 does not
move.
Documentation that described these as open is corrected in the same commit --
section 7's gap list, section 3's "known gap" note, the priority list, the
dependency table, and the README's unimplemented-verbs section all said blocked
and no longer are. Section 3 also gains the thing that replaced the gap: the
character grid comes from akgl_text_measure(font, "A", &w, &h), the direct
equivalent of the font.SizeUTF8("A") at basicruntime.go:96, and
akgl_text_measure_wrapped takes the same wraplength argument
akgl_text_rendertextat does so the measurement and the draw cannot disagree
about where a line breaks.
One caveat recorded rather than papered over: -DAKBASIC_WITH_AKGL=ON has never
been configured in this repository, because until now there was nothing to build
against. The akbasic_akgl target is unproven and needs libakgl's own submodules
present. Expect to fix something there on the first attempt.
Default build unaffected: ctest 61/61, doxygen exits 0, no warnings.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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506af093a1
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Add mutation testing, and split the release gates into their own workflow
Ports libakstdlib's mutation harness (the newest of the three) to scripts/
mutation_test.py, adds the namespaced `mutation` CMake target the sibling
libraries have, and splits CI in two.
.gitea/workflows/ci.yaml keeps the push path: suite, ASan+UBSan, coverage, and a
mutation run bounded to src/convert.c and src/symtab.c -- about four minutes,
scoring 77.8% against a gate of 65.
.gitea/workflows/release.yaml is new and manual (workflow_dispatch). It carries
the doxygen gate, moved out of ci.yaml, and a whole-tree mutation run: 3675
mutants and hours of runner time, which is a release cost rather than a
per-commit one. Both artifacts a release wants -- api-documentation and
mutation-report -- come out of it. Two optional inputs narrow the run or change
the threshold; they arrive through the environment rather than being
interpolated into the shell, because ${{ }} substitution happens before the
shell sees the line.
The harness paid for itself immediately, which is the point of it. Three real
gaps, each checked to be a genuine bug rather than an equivalent mutant:
- errno was never asserted clear before a strtoll. Confirmed with a standalone
probe that strtoll leaves a stale errno untouched on success, so without the
`errno = 0` a valid conversion raises ERANGE.
- Nothing exercised a maximum-length symbol-table key, so every MAX_KEY - 1
off-by-one in a strncpy and its NUL terminator survived. The same hole exists
for strings in src/value.c and is filed.
- Nothing asserted a freshly initialised table was actually zeroed.
Closing the first two took the measured score from 73.1% to 77.8%.
I set the push-path threshold to 75 first, on an estimate. Measuring gave 73.1%
and the job would have failed on its first run -- the earlier per-file figure was
too high because the captured output had been truncated to its last lines and I
counted fewer survivors than there were. It is 65 now, and the gate was run as
written and confirmed to exit 0.
src/value.c is the file most worth mutating and is deliberately off the push
path: 368 mutants at ~11s each is about 70 minutes, because almost everything
links against it. A partial run over it found the same maximum-length-string
hole plus two genuinely equivalent mutants that only exist because of reference
defect section 6 item 5 -- adding both of the right operand's numeric fields
works only while the unused one is zero, so + and - are interchangeable there.
Recorded in TODO.md.
ctest 61/61; doxygen exits 0; both workflows' steps were executed locally, both
input paths included.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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2ddee571a1
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Add a Gitea workflow
Fills the gap TODO.md recorded last commit: the sibling libraries all carry .gitea/workflows/ci.yaml and this one did not, so every gate was run by hand. Four jobs, in the shape libakerror and libakstdlib use, down to the JUnit reporting and the annotate_only note about Gitea 404ing on the Checks API. cmake_build configures, builds and runs the 61-case suite with JUnit output. docs runs `doxygen Doxyfile` -- a real gate, since WARN_AS_ERROR is set -- and uploads build/docs/html as the api-documentation artifact. sanitizers runs the whole suite under ASan and UBSan, which libakstdlib's TODO.md calls its own highest-value missing item and which matters here because this library is all fixed pools and manual buffer arithmetic. coverage gates at 90% of lines against an actual 92.3% and uploads the html report. Two things worth knowing, both checked rather than assumed. The checkout is submodules: true, not recursive. The build needs libakerror, libakstdlib and basicinterpret; it does not need libakgl, which is guarded behind AKBASIC_WITH_AKGL and defaults OFF, and recursing would clone SDL, SDL_image, SDL_mixer, SDL_ttf and jansson for a target that is never configured. The nested submodules are uninitialized in this working tree today and the build is green, which is the proof. The docs job takes no submodules at all -- verified by running doxygen against a tree with deps/ absent. There is no branch-coverage gate. Branch coverage reads 17.3% and is not a meaningful number here, for the reason libakgl's and libakstdlib's TODO.md both record: the akerror control-flow macros expand into large branch trees at every call site, most unreachable in normal operation. Gating on it would mean writing tests for libakerror's macros. All four jobs were executed locally end to end before committing, not just eyeballed: 61/61 plain, 61/61 under ASan+UBSan, doxygen exit 0 producing 441 files, and gcovr exit 0 at the 90 gate. The gate was also confirmed to bite by raising it to 99. Not added: a mutation-testing job, which all three siblings have. There is no scripts/mutation_test.py in this repository to run, and porting libakerror's is its own piece of work -- filed in TODO.md, where it matters more than usual because the akerror macros expand at their call sites and coverage cannot see them. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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134ade9392
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Document the public API in libakgl's Doxygen style
Adds a Doxyfile in the shape libakgl uses -- fifteen deliberate lines, including WARN_IF_UNDOCUMENTED and WARN_AS_ERROR=FAIL_ON_WARNINGS -- and fills in the 70 public declarations that had no doc block, bringing include/akbasic to 114 of 114. libakgl is the model rather than libakstdlib. Measured before starting: libakgl documents 122 of 122 public declarations and libakstdlib 3 of 25, and libakstdlib's Doxyfile is the unedited doxygen default, PROJECT_NAME = "My Project" and an empty INPUT. So the house standard is libakgl's, down to the boilerplate phrasing for the recurring parameters -- "Object to initialize, inspect, or modify", "Output destination populated by the function", "`NULL` on success, otherwise an error context owned by the caller". Worth knowing what the gate actually gates. EXTRACT_ALL=YES suppresses doxygen's undocumented-entity warnings, so the rule it enforces is that a *partial* block is an error: document one @param and you must document them all. Verified by deleting a @param and confirming a non-zero exit, then restoring it. Full coverage is therefore a convention this commit adopts rather than something the tool made me do. Where a contract is non-obvious the block says so rather than restating the signature: math_plus explains why it alone mutates its left operand, new_unary notes that hanging the operand on .right is what makes the parser miscount a negative literal argument, leaf_to_string warns that an assignment renders with an empty operator, and stop_waiting records that a verb nobody is waiting for is tolerated. Each cross-references its TODO.md section 6 item. Also records in TODO.md that this repository has no CI, which libakgl and libakstdlib both have -- so ctest, the sanitizer build, coverage and this new doxygen gate are all run by hand today. ctest 61/61; doxygen Doxyfile exits 0; no warnings under -Wall -Wextra. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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e51b9a1694
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Document host/script variable exchange, and file the scope hazard it exposes
The host can expose variables to a BASIC program, in both directions and for every type, with no marshalling layer -- akbasic_environment_get() finds or creates by name, the type comes from the suffix as it does for BASIC code, and host and script share the same akbasic_Value. Nothing new was needed to make that work. Testing it before writing it up turned up a hazard worth stating plainly, so the README documents the pattern and section 6 item 17 records the gap. Seeding before akbasic_runtime_start() and reading after the script stops is safe, and so is updating an existing global at any time, because the parent chain is searched. Creating one mid-run is not, in two ways, and both are silent. A script suspended part-way through a bounded run() is usually inside a FOR or GOSUB scope, so a variable created through obj->environment lands in that scope and dies when it pops -- the script reads it correctly inside the loop and gets 0 immediately after. And reaching for the root explicitly does not help: akbasic_environment_get only auto-creates when the environment it is given is the active one, so with a child active it returns NULL through dest without raising, and an unchecked host dereferences it. This one is ours rather than inherited. It falls out of the environment pool meeting the bounded run(), a combination the reference never had because its run() never returned. examples/hostvars.c demonstrates both hazards rather than describing them, and prints what it observes, so the day this is fixed that output changes and the example needs revisiting. Like examples/embed.c it is built and run by every build. Both README snippets were extracted and compiled as a check. Not fixed here: akbasic_runtime_global() would close it in about fifteen lines, but what it should do when the script is suspended inside a user function's scope is a design question worth settling deliberately rather than discovering. Filed with the proposed signature and the tests it wants. ctest 61/61; ASan+UBSan 61/61; no warnings under -Wall -Wextra. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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cde6fa8f59
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Port the README from the Go version and document embedding
Carries the reference README across, adjusted where C changes the answer: cmake instead of make, the ak* libraries instead of the go-sdl2 bindings, and the limits table now includes the three ceilings the Go version did not need because it called make(). The new "Embedding the interpreter" section is the point of the rewrite, so it states the four rules the library holds to -- nothing terminates the process, nothing calls malloc, no file-scope mutable state, the host owns the loop -- and each was checked against the tree rather than asserted. Adds akbasic_runtime_load(). Writing the section turned up a real gap: a host usually already holds its script as a string and wants the sink reserved for output, and the only path that existed was AKBASIC_MODE_RUNSTREAM reading the program through the sink's readline, which forces a game to point its output device at its source text. The alternative was reaching into the header's "internal API" block for store_line. Neither is something to put in a README. Adds examples/embed.c, which is the code the README quotes -- a custom sink, a bounded per-frame run, and the PASS-not-CATCH rule for a loop inside an ATTEMPT. It is built by every build and registered as a CTest case, so a signature change breaks the build instead of rotting the document. The README's own snippet is compiled separately as a check; both were run before committing. The "What Isn't Implemented / Isn't Working" section leads with the eleven inherited defects rather than burying them, because five of them were found by this port and a reader deserves to know that 1 - 2 - 3 computes 1 - 2 before they hit it. Corrected two claims while verifying: the runtime is 10.1MB rather than the ~8MB first written, and its largest single cost is the environment pool at 4.1MB, not the source table. ctest 60/60; ASan+UBSan 60/60; no warnings under -Wall -Wextra. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> |
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f8c15c2f2c
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Port the BASIC interpreter from Go to C
Reproduces deps/basicinterpret in C, in the idiom of the ak* libraries. All 41
.bas files in the reference's corpus produce byte-identical stdout, including
the trailing double newline on an error line -- that comes from basicError
building a string ending in \n and handing it to Println, and
array_outofbounds.txt encodes it.
The corpus is driven in place from the submodule as 41 individual CTest cases
rather than copied, so it cannot drift from upstream. Eighteen unit tests cover
what the corpus cannot reach.
Three structural changes carry most of the work. Go's three reflection lookups
(Command*, Function*, ParseCommand*) become one sorted dispatch table in
src/verbs.c searched with bsearch; adding a verb is a row and two functions. The
five Go maps become one fixed open-addressed table over aksl_strhash_djb2. And
run(), which owned the process until MODE_QUIT, splits into step() plus a
bounded run() -- goal 3 requires a host game to be able to bound execution, and
nothing in the library now terminates the process or touches SDL.
Output goes through an akbasic_TextSink vtable. src/sink_stdio.c is what makes
the corpus runnable with no SDL present; the akgl-backed sink is still to come
and is blocked on libakgl having no text-measurement call.
src/convert.c exists because libakstdlib's aksl_ato* family cannot report a
conversion failure (its TODO.md 2.1.5). The reference checks strconv's error at
four sites and turns it into a BASIC error; routing those through aksl_atoi
would have turned four diagnosable errors into wrong answers, with VAL("garbage")
quietly returning 0. TODO.md 1.9 records which libakstdlib calls are cleared for
use here and which are not.
Reference defects are reproduced, not fixed: the golden files encode the observed
behaviour and a silent correction is a behaviour change. TODO.md section 6 lists
sixteen, and tests/known_reference_defects.c asserts the *correct* contract for
six of them under AKBASIC_KNOWN_FAILING_TESTS, so a fix shows up as
"unexpectedly passed". Five of the sixteen were found by this port and are new:
subtraction stops after one operator so 1-2-3 computes 1-2 and abandons the rest
of the line (a wrong answer, not a refused one); a unary-minus argument inflates
a function's arity so ABS(-9) is rejected; a comparison operator in a line's
final column is dropped; hex literals never survive the scanner; and the
"Reserved word in variable name" check is dead code.
Where the reference reaches undefined behaviour by a route that is defined in Go
-- an out-of-range shift, a negative string multiplier, integer division by zero
-- this raises instead of inheriting the UB. No golden case exercises any of
them.
The top-level CMakeLists shadows add_test, set_tests_properties and
add_custom_target around all three add_subdirectory calls. Without it libakerror's
tests land in our suite as Not Run, and its un-namespaced `coverage` target stops
a coverage build from configuring at all. Test targets are akbasic_test_<name>:
bare test_<name> collides with libakstdlib's, which is what broke libakgl's
configure in c2b16d3.
ctest 59/59; ASan+UBSan 59/59; 92.3% line and 96.9% function coverage; no
warnings under -Wall -Wextra. Branch coverage is not a target, for the reason
libakstdlib and libakgl both record: the akerror macros expand into large branch
trees at every call site.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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