Z3 | Verilog implementation of the Infocom Z

by charcole C Version: Current License: BSD-3-Clause

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | Z3 Summary

Z3 is a C library typically used in Embedded System applications. Z3 has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

a verilog implementation of the infocom z-machine v3. back in the very early 80s infocom, the purveyor of very fine text based video games, when faced with the problems of porting their games to the plethora of home computers available back in the day invented a virtual machine optimised for running interactive fiction. then interpreters were written for all the popular computers of the day so they could all run the same code. this virtual machine was never meant to be implemented in hardware although now thanks to cheap fpgas it can be! the z-machine cpu is written in verilog and included here. so using a cyclone ii ep2c5 fpga (~$10), a tft lcd arduino shield (~$3), 512kb 8-bit flash (~$2), 128kb 8-bit sram (~$2) and a adc ($2) you too could have a functioning z-machine system. check out the following youtube video to see it in action…. the spec the z3 follows is… specifically version 3, the so called "standard" games. these were released between 1982 and 1987 and covers most infocom games. z3 passes the "czech -

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Support

Z3 has a low active ecosystem.

It has 115 star(s) with 14 fork(s). There are 9 watchers for this library.

It had no major release in the last 6 months.

Z3 has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Z3 is current.

Quality

Z3 has no bugs reported.

Security

Z3 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

Z3 is licensed under the BSD-3-Clause License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

Z3 releases are not available. You will need to build from source code and install.

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Z3 Key Features

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Z3 Examples and Code Snippets

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Community Discussions

Trending Discussions on Z3

How to reduce the lines of code with multi variable equations?

Merge each group's rows into one row

Need to insert new key value pairs recursiverly inside every children json array

Writeint not displaying the value in EAX register

c# how to convert a JWK to a RsaSecurityKey

Smoothing a curve with vectors made by few elements?

How to get confirmation on every Z3 query?

Dafny as a SAT-QBF solver is not giving right results

How to interpret the output of the z3.solve() function from the z3 API solver?

Select specific date / hour range from list elements and create dataframe

QUESTION

How to reduce the lines of code with multi variable equations?

Asked 2021-Jun-15 at 19:41

I am trying to reduce lines of code because I realized that I am repeating the same equations every time. I am programming a contour map and putting several sources of intensity into it. Until now I put 3 sources, but in the future I want to put more, and that will increase the lines a lot. So I want to see if it is possible to reduce the lines of "source positions" and "Intensity equations". As you can see the last equation is a logaritmic summation of z1, z2 and z3, is it possible to reduce that, any idea?

...

ANSWER

Answered 2021-Jun-15 at 15:45

You could iterate over certain parts in a loop.

I tried to keep the same format overall and just rearranged the code to show how you might do it.

Source https://stackoverflow.com/questions/67989343

QUESTION

Merge each group's rows into one row

Asked 2021-Jun-14 at 09:18

I'm experienced with Pandas but stumbled upon a problem that I can't seem to figure out.

I have a large dataset ((40,000, 16)) and I am trying to group it by a specific column ("group_name" for this matter) and then for each group apply the following rules so it'd merge into one row per group:

x1, x2, x3 are the "important" columns, if one row has less nulls than the others, take it. (see example with row D)
If there are conflicts in any column, it's arbitrary and we can pick whatever.
Combine the nulls on the important fields (x1, x2, x3), see example with row A.

Here is an example with 6 rows that should turn into 4 groups (aka 4 rows).

So far I have groups = df.groupby['group_name']

I tried many other solutions such as summing each group, applying a transformation, aggregating by each 'important' column, merging on each 'important' column and more. Each solution brought it's own problems so I'm offering this question here without limiting people to a certain way.

Also, I spent nearly two days combining different solutions from other questions but none has seem to work. Perhaps I've missed something.

Please note that since this is a large dataset, I'd very much like to avoid using for loop on each group since efficiency is something to consider here.

I hope I explained everything properly, please let me know if something is unclear.

Code to re-create the dataframe (thanks to @Henry Ecker from the first answer):

...

ANSWER

Answered 2021-Jun-13 at 16:35

Try with groupby aggregate 'first' to get the first (valid) value from every column for each group_name:

Source https://stackoverflow.com/questions/67960309

QUESTION

Need to insert new key value pairs recursiverly inside every children json array

Asked 2021-Jun-12 at 10:08

i have a nested json array of objects:

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ANSWER

Answered 2021-Jun-12 at 09:54

$arr = json_decode('[{
    "form_name": "z1",
    "name":"name1",
    "peopleCount": "125,678,190",
    "children": [{
        "form_name": "z2",
        "name":"name2",
        "peopleCount": "156,987",
        "children": [{
            "form_name": "z3",
            "name":"name2",
            "peopleCount": "678,098"
        }]
    }]
}]', TRUE);
function countTotal($data) {
    if(is_array($data)){
        foreach($data as $row){
            $row['peopleCount'] = 0;///here total val
            if(isset($row['children']) {
                countTotal($row['children']);
            }
        }
    }
    else {
        $data['peopleCount'] = 0;//here total val
    }
}
countTotal(&$arr);

Source https://stackoverflow.com/questions/67947494

QUESTION

Writeint not displaying the value in EAX register

Asked 2021-Jun-11 at 09:34

I have written the following assembly code.
It's displaying the output of writeint as +0
But When I put the debug point on the line before writeint and look at the registers
I see EAX=0000BFBE. As per my understanding writeint should print the value of EAX
register. What could be the reason that it's showing +0?

...

ANSWER

Answered 2021-Jun-11 at 09:34

By putting the breakpoint on the line before, I assume you mean that you put the breakpoint here:

Source https://stackoverflow.com/questions/67934031

QUESTION

c# how to convert a JWK to a RsaSecurityKey

Asked 2021-Jun-02 at 09:23

I am trying to verify signatures against a public key, and i got that working using RSACryptoproviders etc. I set the public key (importing the key in PEM format, reading the rsa parameters and then creating an RsaSecurityKey) It all works, but now a client wants me to support not only the PEM format, but also de JWK format.

When I google, I find 100 sites converting PEM's to JWK's (there is a JwkConvert class even) but it only goes one way.

How in c# can I do it the other way around? so I can convert the JWK to a RsaSecurityKey?

I found this post: How to transform a jwk to public key over openssl But i'm hoping i don't have to write all that myself..

Also, i'm allready using BouncyCastle crypto library (I use it for importing the PEM format)

I was hoping I could retreive the RsaParameters from the JWK, but i'm just a user of crypto and the letters don't tell me anything.

to give a bit more information, this is my JWK:

...

ANSWER

Answered 2021-Jun-02 at 09:23

as it turns out it was an oopsie from my side.. the string i posted was a jsonWebKeySET and not just a single jsonwebkey. I put it in the constructor of the JsonWebKey class and got no parse error whatsoever (grrr microsoft) so assumed it was correct.

Turns out I had to use the JsonWebKeySet() class. @jps comment helped a lot after that. (don't know how to give you credit for that)

Source https://stackoverflow.com/questions/67800128

QUESTION

Smoothing a curve with vectors made by few elements?

Asked 2021-May-29 at 18:38

I have 4 curves that are represented by these vectors:

...

ANSWER

Answered 2021-May-29 at 18:38

Alright, so what I'm proposing here is cheating and inventing data, but at least it makes the curves look a little more like you (or your supervisor) want.

Source https://stackoverflow.com/questions/67750011

QUESTION

How to get confirmation on every Z3 query?

Asked 2021-May-29 at 10:26

I am using a remote Z3 console by sending queries through the standard input and reading stdout/err for errors and responses. The problem is I don't see a way to reasonably check if the query has been successfully executed without falling into data races.

Example of issue:

Let's say I send a query

...

ANSWER

Answered 2021-May-29 at 10:26

I think (set-option :print-success true) should do exactly that.

Source https://stackoverflow.com/questions/67750125

QUESTION

Dafny as a SAT-QBF solver is not giving right results

Asked 2021-May-27 at 08:42

I am trying to get the habit to use Dafny as a friendly SAT-QBF solver for some simple formulae, since doing it in, for instance, Z3 is too uncomfortable.

The context for this is that I have implemented Cooper's algorithm for quantifier elimination and, when all the variables are bounded, it can be used as a decision procedure: therefore, I want to know which is the result that I should get before executing it.

However, I encountered a problem in Dafny.

Let us raise, for instance, this formula (written in Dafny):

...

ANSWER

Answered 2021-May-25 at 17:29

You cannot do this with Dafny. While Dafny supports quantifiers, booleans, arithmetic, and many other things (recursive functions, sets, sequences, objects and references, multi-dimensional arrays, induction, inductive and coinductive datatypes, bitvectors, greatest and least fixpoints of monotonic functions, etc.), it is not suitable for SAT-QBF (or QBF + artihmetic) benchmarks.

Dafny's errors, including the assertion violation, tell you that the verifier was not able to do the proof. It may be that the property still holds, but you'll need to supply more of the proof yourself. In other words, you should interpret the assertion violation as a "don't know" answer. Stated differently, you cannot decide (only semi-decide) formulas with Dafny.

Dafny uses quantifiers in the SMT solvers via matching patterns, aka triggers. When a quantifier has no good triggers, which is what Dafny's "no trigger" warning is telling you, you may see bad performance, unstable verifications, and so-called butterfly effects (where a small and seemingly unrelated part of the program causes a change in the automatic construction of other proofs). Triggers are driven by uninterpreted function symbols, which your example doesn't have at all.

If you want a readable syntax, you may be able to do what you're trying through Boogie. I have not tried that, but you could try putting Boogie in its monomorphic mode and then supplying prover options to ask for the SAT-QBF or something similar (see Boogie's /help). Otherwise, if you're interested in deciding these problems, then going directly to SMT solver is the way to go.

Source https://stackoverflow.com/questions/67669782

QUESTION

How to interpret the output of the z3.solve() function from the z3 API solver?

Asked 2021-May-26 at 16:34

I'm new to z3 smt solver.I'm using the python API z3py.

I have a quick question concerning the output of the z3.solve() function.what does it mean when I call z3.solve() on some constraints and I get [] as an output? Also could someone refer me to a good documentation please

...

ANSWER

Answered 2021-May-26 at 15:31

You really need to provide an input that causes this, as it really depends on your constraints. But here's the simplest way to illustrate this behavior:

Source https://stackoverflow.com/questions/67707493

QUESTION

Select specific date / hour range from list elements and create dataframe

Asked 2021-May-26 at 15:29

I have a list with approximately 150 elements (data frames) of weather data (ID,date,time,temperature). I want to select specific date range and time from each list element (df) and create a data frame (or multiple) with these selected rows. Given the fact I can't provide real data I've created a reproducible example:

...

ANSWER

Answered 2021-May-26 at 15:29

As mentioned by @AntoniosK, your filter logic was off so I made a few amendments but most importantly, for this filter to work, we need to make sure the date and time are "date" and "time" class respectively.

Source https://stackoverflow.com/questions/67706151

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You can download it from GitHub.

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