Re: [std.file] dirEntries
On Monday, 12 December 2011 at 14:43:38 UTC, Tobias Pankrath
wrote:
I can't see, what I'am doing wrong. Can anyone help?
You can't do this only using a glob. The glob syntax used by
dirEntries is described here:
http://dlang.org/phobos/std_path.html#globMatch
You can do this with std.algorithm.filter: auto files = filter!
q{a.name.startsWith("temp_") && !a.name.canFind('.')}
(dirEntries("myDir", SpanMode.breadth));
foreach (de; files)
writeln(de.name);
Restrict access to "critical" functions
Hi, I want to restrict the access of a piece of d2-code to just some functions I declare allowed. E.g. I would like to forbid all access to io and prevent the program to format my hd. Or even better I would like to tell D2 which functions of the std-libraries are allowed, all other functions should not be callable. Goal would be to have a possibility to compile and let run code from random people (some of them perhaps evil minded), watch over the processes and kill them, if they take too long or use up too much memory. Thanks in advance Christian Köstlin
Re: How is string from "..." different from string from a file ?
Thank you very much, you made my day, that was it :-) Cheers, ParticlePeter ! > OpenGL probably wants a zero-terminated string. It works if you add the > code as a literal because string literals are zero-terminated. > > string fragString = readText( "Shader.vert" ) ~ '\0'; > > Alternatively, you can embed the file in you executable: > > immutable string fragString = import( "Shader.vert" ); // read at > compile time
Re: [std.file] dirEntries
I'm not sure if it's a different RegEx pattern than other languages, but you may wish to try: temp_[^\.]* [] typically indicates a character class or set of characters. ^ is used to indicate unallowed / exception characters . will typically need to be escaped, depending on context.
Re: How is string from "..." different from string from a file ?
On Mon, 12 Dec 2011 12:59:11 -0500, Timon Gehr wrote: On 12/12/2011 06:37 PM, bearophile wrote: Timon Gehr: string fragString = readText( "Shader.vert" ) ~ '\0'; I think using toStringz is more self-documenting. Bye, bearophile There is nothing more self-documenting than actually appending the zero. Claiming toStringz is better in that regard is like saying a+1 is less self-documenting than doAddo(a) ;) There might be other benefits of using toStringz though, (for example, it won't add the zero if it is already there, but that does not apply here). x ~ y *always* makes a copy of x, whereas toStringz(x) will (should?) use append (which could potentially save another heap allocation). However, I'm not sure what kind of state the result of readText is in. -Steve
Re: How is string from "..." different from string from a file ?
On 12/12/2011 06:37 PM, bearophile wrote: Timon Gehr: string fragString = readText( "Shader.vert" ) ~ '\0'; I think using toStringz is more self-documenting. Bye, bearophile There is nothing more self-documenting than actually appending the zero. Claiming toStringz is better in that regard is like saying a+1 is less self-documenting than doAddo(a) ;) There might be other benefits of using toStringz though, (for example, it won't add the zero if it is already there, but that does not apply here).
Re: How is string from "..." different from string from a file ?
Timon Gehr: > string fragString = readText( "Shader.vert" ) ~ '\0'; I think using toStringz is more self-documenting. Bye, bearophile
Re: How is string from "..." different from string from a file ?
On 12/12/2011 03:35 PM, ParticlePeter wrote: Hi, I have a hard time reading in a string from a file. I don't get any compile time or run time errors, but my application does not work reliably when I read a string from a file. But when I define the same string within my code, everything runs perfect, allways. The string I want to use is an OpenGL Shader, but the problem is not to be related to OpenGL as far as a I see. Are there some format strings which I need to get rid of, and how ? I tried: import std.file ; string fragString = readText( "Shader.vert" ) ; import std.file , std.utf ; string fragString = toUTF8( readText( "Shader.vert" ) ) ; import std.stdio ; string text = "" ; auto file = File( "Shader.vert" ) ; foreach( line ; file.byLine() ) string ~= strip( to!( string )( line ) ) ; What else could I try ? Cheers, ParticlePeter ! OpenGL probably wants a zero-terminated string. It works if you add the code as a literal because string literals are zero-terminated. string fragString = readText( "Shader.vert" ) ~ '\0'; Alternatively, you can embed the file in you executable: immutable string fragString = import( "Shader.vert" ); // read at compile time
Re: Reading in files as int/float array or one String/char[] ( OpenGL Data )
On 12/12/2011 09:31, ParticlePeter wrote: Hi, I read several posts about reading in files, but I can't find the "best" way for my purpose. I am using std.file in the examples bellow. 1.) I'm trying to read an OpenGL Vertex and Fragment Shader. The wired thing on my approach is that it works ... sometimes, but sometimes the Shaders cannot be compiled. So how should I read a file as one complete char[] in a safe way ? This is my way: auto fileFrag = cast( GLchar[] )readText( "Shader/Shader_01.frag" ) ; const GLchar * fragSource = cast( GLchar * )fileFrag ; string literals are zero terminated, but strings returned by library functions may not be. Try appending a zero to the read string: string fragString = readText( "Shader.vert" ) ~ "\0"; -- My enormous talent is exceeded only by my outrageous laziness. http://www.ssTk.co.uk
[std.file] dirEntries
Hello,
I'm struggling with std.file.dirEntries. I want iterate over every file
below a directory, which name starts with "test_" and does not
contain a point (".").
I've tried this, but it does not work:
--
foreach(DirEntry de; dirEntries("myDir", "temp_[!.]*", SpanMode.breadth))
{
writeln(de.name);
}
--
It also prints names of files, which names do contain points.
I can't see, what I'am doing wrong. Can anyone help?
Tobias
How is string from "..." different from string from a file ?
Hi, I have a hard time reading in a string from a file. I don't get any compile time or run time errors, but my application does not work reliably when I read a string from a file. But when I define the same string within my code, everything runs perfect, allways. The string I want to use is an OpenGL Shader, but the problem is not to be related to OpenGL as far as a I see. Are there some format strings which I need to get rid of, and how ? I tried: import std.file ; string fragString = readText( "Shader.vert" ) ; import std.file , std.utf ; string fragString = toUTF8( readText( "Shader.vert" ) ) ; import std.stdio ; string text = "" ; auto file = File( "Shader.vert" ) ; foreach( line ; file.byLine() ) string ~= strip( to!( string )( line ) ) ; What else could I try ? Cheers, ParticlePeter !
Re: Reading in files as int/float array or one String/char[] ( OpenGL Data )
2.) I am reading in Vertex Data from a file. It holds only floats, e.g.: -38.3887 97.7612 -10.5231 -38.3572 98.8543 -10.5064 ... There is no metadata in the file giving information about the count of values. 3.) When reading a file line by line it would be nice to have the count of Lines of the file ( numLines ) If each line takes at least 25 bytes, you can divide file size by 25 - this will be an estimation of number of lines.
Re: Reading in files as int/float array or one String/char[] ( OpenGL Data )
ParticlePeter:
> auto fileFrag = cast( GLchar[] )readText( "Shader/Shader_01.frag" ) ;
> const GLchar * fragSource = cast( GLchar * )fileFrag ;
Avoid raw casts every time it is possible. The second cast is not necessary,
using the ".ptr".
> I use a dynamic array, and append each line to my array, which I think is not
> the most clever or efficient approach:
Try std.array.appender.
> 3.) When reading a file line by line it would be nice to have the count of
> Lines of the file ( numLines ) and the line number in a variable, so I could
> random access a fixed size array with this line number.
Fixed-sized arrays are often not good if you need to put lot of data inside
them, because the stack has limited space (unless you allocate the fixed sized
array on the heap).
> Can I get all floats ( words as float ) from a file at once without using
> file.byLine into a Dynamic array ( or fixed array, I know the word count ) ?
In theory std.conv.parse is useful for this:
import std.stdio, std.conv;
void main() {
string s = "[[1,2],[3,4]]";
auto p = parse!(double[][])(s);
writeln(p);
}
In practice the signature of one parse overload is:
Target parse(Target, Source)(ref Source s, dchar lbracket = '[', dchar rbracket
= ']', dchar comma = ',');
lbracket is a char instead of being a string, so I don't know how to parse a
row that lacks commas and brackets. This seems an enhancement request.
> How can I get the Line count from a file,
You probably need to just iterate the file lines, and count them.
> and how can I get the line numbers without initializing a counter in front of
> the foreach loop and increase it manually inside the loop ?
With walkLength:
import std.stdio, std.range;
void main() {
immutable size_t nLines = walkLength(File("data.txt").byLine());
writeln(nLines);
}
Bye,
bearophile
Re: Reading in files as int/float array or one String/char[] ( OpenGL
Andrej Mitrovic Wrote: > I have a funky feeling you're reading NeHe? Try this: THX, that's very cool, will definitly look deeper into these samples. I know NeHe, but am following The OpenGL Book, and using DerelictSDL. This shows me how you do it, but does not answer my questions, my Shader Issue in particular. I need to add that when I use the Shaders from within my code, defined as a String, the Shader Program compiles and links always, but when I read the same Shaders from a file with my method they compile and link randomly. How do you read in Shaders ? Cheers, ParticlePeter !
Re: Reading in files as int/float array or one String/char[] ( OpenGL Data )
I have a funky feeling you're reading NeHe? Try this: https://github.com/AndrejMitrovic/DNeonHelium/blob/master/Samples/win32/lesson25.d#L87
Reading in files as int/float array or one String/char[] ( OpenGL Data )
Hi, I read several posts about reading in files, but I can't find the "best" way for my purpose. I am using std.file in the examples bellow. 1.) I'm trying to read an OpenGL Vertex and Fragment Shader. The wired thing on my approach is that it works ... sometimes, but sometimes the Shaders cannot be compiled. So how should I read a file as one complete char[] in a safe way ? This is my way: auto fileFrag = cast( GLchar[] )readText( "Shader/Shader_01.frag" ) ; const GLchar * fragSource = cast( GLchar * )fileFrag ; 2.) I am reading in Vertex Data from a file. It holds only floats, e.g.: -38.3887 97.7612 -10.5231 -38.3572 98.8543 -10.5064 ... There is no metadata in the file giving information about the count of values. I use a dynamic array, and append each line to my array, which I think is not the most clever or efficient approach: vertices = new GLfloat[0] ; auto file = File( "Data/Vertices_01.txt" ) ; foreach( line ; file.byLine() ) vertices ~= to!( GLfloat[] )( line.split ) ; file.close() ; Can I get all floats ( words as float ) from a file at once without using file.byLine into a Dynamic array ( or fixed array, I know the word count ) ? If not, what would be the most efficient approach for these kind of files ( they might get huge ) ? 3.) When reading a file line by line it would be nice to have the count of Lines of the file ( numLines ) and the line number in a variable, so I could random access a fixed size array with this line number. I tried this code, which works for arrays, but unfortunately not for lines ( for me ). GLfloat arrVertex[ numLines ][ 3 ] ; foreach( i , line ; file.byLine() ) arrVertex[ i ] = to!( GLfloat[3] )( line.split ) ; How can I get the Line count from a file, and how can I get the line numbers without initializing a counter in front of the foreach loop and increase it manually inside the loop ? Thank you for any advice, Cheers, ParticlePeter !
