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Questions tagged [xbase]

(A) Xbase is a structured format for storing data in files and indexes. It was used originally by foxPro and dBase. (B) Xbase is an expression language provided by Xtext.

83 questions
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3 answers

Python: Fast querying in a big dbf (xbase) file

I have a big DBF file (~700MB). I'd like to select only a few lines from it using a python script. I've seen that dbfpy is a nice module that allows to open this type of database, but for now I haven't found any querying capability. Iterating…
static_rtti
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1 answer

Access outer variable inside a block and Y-combinator

I hope you all to be fine. I'm implementing the fixed-point Y-combinator in Harbour and I'm having some troubles with it. Well, the Y-combinator can be defined by the lambda-calculus as: Y = (λh.λF.F(λ x.((h(h))(F))(x))) (λh.λF.F(λ…
Marcelo Camargo
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What is __GNU LesserC__, __GNU LesserG__?

I found following code in library I'm trying to compile #ifdef __GNU LesserC__ __attribute__((packed)) #endif and #ifdef __GNU LesserG__ #pragma interface #endif What the hell is __GNU LesserC__? Why is there the space, #ifdef afaik doesn't…
graywolf
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3
votes
4 answers

Visual FoxPro Compact Index File Format

I am trying to understand the file format of a Visual FoxPro compact index (*.IDX). I am currently referring to Microsoft's documentation for guidance. The index is a B-tree of 512-byte nodes. Each leaf ("exterior") node contains multiple entries.…
Adam Paynter
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3
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2 answers

Which header format can be assumed by reading an initial .DBF byte?

Regarding the first byte of a .DBF file and how to detect the version of xbase used (ie, the format of the rest of the file), the most comprehensive list I can compile is: Byte 0 ----------- x xxx x 001 = 0x?1 not used 0 000 0 010 = 0x02 FoxBASE 0…
user358080
3
votes
1 answer

How to use XBaseInterpreter in Xtext?

can someone tell me, how i can use "xbaseinterpreter"? I have no idea :( I have written a DSL used to define simple protocol-structure for a sensornet, the goal of the work is to check if a data-message(as Instance) belongs to any user-defined…
Wendsja
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1 answer

How to add custom import statements in the generated java file in xtext using jvmmodelInferrer?

I have written a grammar for my domain specific language in xtext and I am using jvmmodelInferrer to generate java code. I can generate fields and custom methods but how can I add custom import statements like 'import java.util.*' in the generated…
Kartik Raut
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1 answer

Xbase - How to add tags on top on inferrer generated methods

I have figured out how to create methods and add to the bodies of the method. What I need to also do is add annotations to the generated method such as @Test etc, how would I accomplish this?
J. Doe
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2
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2 answers

how to update a record with the dbf module

How can I update a record in a dbf with the dbf module : https://pypi.python.org/pypi/dbf Here is what I tried: table2 = dbf.Table(filename, codepage="cp1252") table[0].name = "changed" But I get: File "", line 1, in File…
maazza
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2
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2 answers

java expressions with binary operators in xbase not working

I'm using xbase grammar xolang.Xolang with org.eclipse.xtext.xbase.Xbase and an XBlockExpression where I expect to write my code When write an expression like val c = 1 + 1 Then I get the following error The method +(int) is undefined The same…
tgoossens
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2
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0 answers

Xtext: Couldn't resolve reference to JvmType 'String'

For our master project at university we created multiple DSLs using Xtext. One of the DSLs is a model entity DSL which allows the user to create a class with properties and methods. We reuse Xbase because, of course, we want the methods to have a…
dst
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2 answers

How do I interface an xBase based ERP to a web application?

I am required to setup a web application that will interact with an existing ERP system (WinMagi). The ERP is basically a front-end to an xBase (FoxPro) database. The database is located on an in-house server. The ERP, as far as I'm aware, doesn't…
max
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KivyMD FitImage from xbase64 raw data

I have a response from a server that gives me an xbase64 image. I need to turn this image into a FitImage. My kivy file has an element like this: FitImage: id: fish_image pos_hint: {'center_y': 0.85} allow_stretch: True …
artem abdyushev
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php-xbase: .fpt file disappears when appending record to .dbf file

I have successfully managed to append a record to a .dbf file using hasumi's php-xbase extension in PHP. However, the .fpt file containing memo data disappears every time I append a record. use XBase\Enum\FieldType; use XBase\Enum\TableType; use…
cp_bmwebdev
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1 answer

Solving a left recursion problem in xText

I am currently working on creating a DSL in xText and I am stumbling upon a problem which is probably related to an ambiguity or left recursion problem. I am not sure which of these two problems applies to my case (similar topics I found online also…
Jos B.
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