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June 01, 2004 writing files: trouble | ||||
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I need some help... I am trying to save a file. It (almost works)... but it happens that this code prints some extra characters in the beggining of the file. why? void save(char[] filename){ int node, offset; OutBuffer buffer = new OutBuffer(); buffer.reserve(20*_xdim*_ydim); buffer.printf("lines = %d\r\n", _ydim); buffer.printf("columns = %d\r\n", _xdim); for (int line = 0; line < _ydim; ++line){ for (int col = 0; col < _xdim; ++col){ offset = node*_nways; buffer.printf("node %d = %d:%d:%d:%d:%d\r\n", node, _paths[offset + 0], _paths[offset + 1], _paths[offset + 2], _paths[offset + 3], _bonus[node++]); } } buffer.printf("\r\n"); File file = new File(filename, FileMode.Out); file.write(buffer.toString()); file.close(); thanks, Miguel |
June 01, 2004 Re: writing files: trouble | ||||
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Posted in reply to Miguel Ferreira Simões | I noticed that FileMode.Out overrides the file it it exists previously... the result is a file that is a mix of two files!?! (running windows xp sp1/dmd 0.91) |
June 01, 2004 Re: writing files: trouble | ||||
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Posted in reply to Miguel Ferreira Simões | > file.write(buffer.toString()); stream.write(char[]) will first write the length of the string and then the string contents. The function writeString will just write the contents: file.writeString(buffer.toString()); |
June 01, 2004 Re: writing files: trouble | ||||
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Posted in reply to Ben Hinkle | <shameless plug> this is where multiple distinct readers/writers (BinaryWriter, DisplayWriter etc)really helps within mango.io :-) </shameless plug> "Ben Hinkle" <bhinkle4@juno.com> wrote in message news:c9go14$28s4$1@digitaldaemon.com... > > > file.write(buffer.toString()); > > stream.write(char[]) will first write the length of the string and then the > string contents. The function writeString will just write the contents: > file.writeString(buffer.toString()); > > |
June 01, 2004 Re: writing files: trouble | ||||
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Posted in reply to Ben Hinkle | Thanks. One problem solved... what can I do to have the writeString() function not overriding an existing file, I mean delete the file and then write, just like an fopen(filename, "w"); "Ben Hinkle" <bhinkle4@juno.com> escreveu na mensagem news:c9go14$28s4$1@digitaldaemon.com... > > > file.write(buffer.toString()); > > stream.write(char[]) will first write the length of the string and then the > string contents. The function writeString will just write the contents: > file.writeString(buffer.toString()); > > |
June 01, 2004 Re: writing files: trouble | ||||
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Posted in reply to Miguel Ferreira Simões | Miguel Ferreira Simes wrote:
> Thanks. One problem solved...
> what can I do to have the writeString() function not overriding an
> existing file, I mean delete the file and then write,
> just like an fopen(filename, "w");
I think you have to use std.file:
if (std.file.exist(filename)) std.file.remove(filename);
and catch any exceptions that may be thrown if something fails.
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June 01, 2004 Re: writing files: trouble | ||||
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Posted in reply to Ben Hinkle | "Ben Hinkle" <bhinkle4@juno.com> wrote in message news:c9gs25$2ei4$1@digitaldaemon.com... > Miguel Ferreira Simes wrote: > > > Thanks. One problem solved... > > what can I do to have the writeString() function not overriding an > > existing file, I mean delete the file and then write, > > just like an fopen(filename, "w"); > > I think you have to use std.file: > if (std.file.exist(filename)) std.file.remove(filename); > and catch any exceptions that may be thrown if something fails. File has a create method. |
June 02, 2004 Re: writing files: trouble | ||||
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Posted in reply to Miguel Ferreira Simões | On Tue, 1 Jun 2004 03:47:27 +0100
"Miguel Ferreira Simões" <kobold@netcabo.pt> wrote:
> Thanks. One problem solved...
> what can I do to have the writeString() function not overriding an
> existing file, I mean delete the file and then write,
> just like an fopen(filename, "w");
What version of dmd or gdc are you using for this? Using dmd 0.90 and/or the current gdc, my files are overwritten (completely recreated) when using File(someString, FileMode.Out) to construct the File stream.
Dennis
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June 02, 2004 Re: writing files: trouble | ||||
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Posted in reply to Dennis Walters, II | I am using dmd 0.91. (windows xp sp1) "Dennis Walters, II" <scruff@myrealbox.com> escreveu na mensagem news:20040601232230.6a15982c.scruff@myrealbox.com... On Tue, 1 Jun 2004 03:47:27 +0100 "Miguel Ferreira Simões" <kobold@netcabo.pt> wrote: > Thanks. One problem solved... > what can I do to have the writeString() function not overriding an > existing file, I mean delete the file and then write, > just like an fopen(filename, "w"); What version of dmd or gdc are you using for this? Using dmd 0.90 and/or the current gdc, my files are overwritten (completely recreated) when using File(someString, FileMode.Out) to construct the File stream. Dennis |
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