| Topic: |
DEVELOP > c-Plus-Plus |
| User: |
"Jacob Voytko" |
| Date: |
01 Dec 2004 01:49:50 PM |
| Object: |
g++: How do I access a list of all files in a folder? |
I am working with a group to write a program that organizes mp3 files
in a root folder based on tag criteria. The tag readers are written,
we are having trouble finding g++ documentation on reading all files
in a folder, and deciding which files are mp3's. Any help will be
appreciated.
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| User: "Jacek Dziedzic" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
01 Dec 2004 04:13:10 PM |
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Jacob Voytko wrote:
I am working with a group to write a program that organizes mp3 files
in a root folder based on tag criteria. The tag readers are written,
we are having trouble finding g++ documentation on reading all files
in a folder, and deciding which files are mp3's. Any help will be
appreciated.
What's a folder? <g>
- J.
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| User: "Victor Bazarov" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
01 Dec 2004 02:00:21 PM |
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Jacob Voytko wrote:
I am working with a group to write a program that organizes mp3 files
in a root folder based on tag criteria. The tag readers are written,
we are having trouble finding g++ documentation on reading all files
in a folder, and deciding which files are mp3's. Any help will be
appreciated.
news:gnu.g++.help
news:comp.os.<your_os_here>.*
V
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| User: "Jacob Voytko" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
01 Dec 2004 06:26:24 PM |
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Gracias, seņor
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| User: "Thomas Ruschival" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
01 Dec 2004 03:53:55 PM |
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just use the standard C function readdir()
the best thing about c++ is, you an use almost all th C-Libraries that have been developped ever since K&R invented C
Thomas
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| User: "Jerry Coffin" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
01 Dec 2004 08:40:27 PM |
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Thomas Ruschival <t.ruschival@vivid-md.de> wrote in message news:<20041201225355.082fc7a5@Woody>...
just use the standard C function readdir()
While readdir is in a standard, it's in the POSIX standard, not the C
standard.
the best thing about c++ is, you an use almost all th C-Libraries that have
been developped ever since K&R invented C
C was invented and in wide use for a LONG time before readdir was
invented (before System V or so, directories also followed the UNIX
dictum that everything be treated as files -- a directory was just a
file full of structures of a specific type).
While Brian Kernighan helped write the original book on C, he did not,
by all accounts, help to invent the language -- if you were going to
give credit to anybody but Dennis Ritchie, possibilities might include
Ken Thompson (invented B, C's progenitor as well as the UNIX system to
which C was so closely bound, early on), Martin Richards (inventor of
BCPL, the progenitor of B) and/or Doug McIlroy (apparently invented
C's preprocessor, among many other things).
Though I wasn't present at the time, so my opinion should be taken
with a grain of salt, my own nomination in this category would
probably be Doug McIlroy -- reading books, papers, etc., it seems to
me like he influenced nearly every part of early UNIX and
(particularly) may have been one of the most careful about getting
things _right_ rather than "close enough."
--
Later,
Jerry.
The universe is a figment of its own imagination.
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| User: "Ron Natalie" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
02 Dec 2004 09:13:14 AM |
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Jerry Coffin wrote:
C was invented and in wide use for a LONG time before readdir was
invented (before System V or so, directories also followed the UNIX
dictum that everything be treated as files -- a directory was just a
file full of structures of a specific type).
And it still is (actually, the more modern ones have variable length
things in it). Readdir just knows how to parse the directory file.
If I remember correctly, the original directories were just the
following:
struct {
unsigned short ino;
char name[14];
};
repeated.
When a file was removed, it just wrote zero to the ino member.
This led to an activity of artfully creating and deleting files
so that when you did something like:
cat /tmp
after some initial garbage for the files that were actually in use
there would appear a few new lines and some sort of ASCII-art picture.
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| User: "Victor Bazarov" |
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| Title: Re: g++: How do I access a list of all files in a folder? |
01 Dec 2004 03:59:04 PM |
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Thomas Ruschival wrote:
just use the standard C function readdir()
There no such standard C function. Perhaps you're considering the library
you have for programming your OS as standard. It isn't.
the best thing about c++ is, you an use almost all th C-Libraries that have been developped ever since K&R invented C
That's only true if you use an object-file compatible compiler.
V
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