Date: Fri, 1 Aug 2014 02:00:24 +0200 From: Polytropon <freebsd@edvax.de> To: Gary Kline <kline@thought.org> Cc: FreeBSD Mailing List <freebsd-questions@FreeBSD.ORG> Subject: Re: how to grab text w/ fcanf Message-ID: <20140801020024.bf03b2d3.freebsd@edvax.de> In-Reply-To: <20140731233335.GA24151@ethic.thought.org> References: <20140731233335.GA24151@ethic.thought.org>
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On Thu, 31 Jul 2014 16:33:35 -0700, Gary Kline wrote:
> I've got a *.c file that returns in [let's say]
>
> /tmp/share/voice
>
> a bunch of files named: "text.1.txt", "text.2.txt",
> "text.3.txt" ... text.N-1.txt", each file containing a few
> sentences of plain ol' ASCII or [whatever] text.
>
> what is the easiest way, in C, *knowing the count=N*, to
> grab the *text files and stuff the paragraphs into a global
> buffer: char *parabuffer[1024]; ??
I think scandir() is what you're searching for, in combination
with alphasort() to get the "natural" ordering of the files.
Plain C.
Example code:
#include <dirent.h>
#include <stdio.h>
#include <stdlib.h>
...
struct dirent **namelist;
int i,n;
n = scandir(".", &namelist, 0, alphasort);
if (n < 0)
perror("scandir");
else {
for (i = 0; i < n; i++) {
printf("%s\n", namelist[i]->d_name);
free(namelist[i]);
}
}
free(namelist);
...
Source for example:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/alphasort.html
You can iterate over namelist[] and access the d_name structure
member for the file name, and then use string operations like
strlcmp() or strnstr() to check for desired entries (given a
file mask, such as "test.*.txt", as a pattern).
See "man scandir" for details. Maybe consider readdir(),
see "man readdir" which contains the following example:
len = strlen(name);
dirp = opendir(".");
while ((dp = readdir(dirp)) != NULL)
if (dp->d_namlen == len && !strcmp(dp->d_name, name)) {
(void)closedir(dirp);
return FOUND;
}
(void)closedir(dirp);
return NOT_FOUND;
If this is too complicated, you could do the following, but
know that it's quick and _very_ dirty: sprintf() the filenames
with a counter N in the _known_ (!) pattern and test if the
files do exist, with fopen(); if fopen() fails, you know
that no further files will follow, you decrease the counter
by 1 and have the last valid index. :-)
As I initially said, this is quite low level C. Maybe you can
see something more elegant in the Gtk 3 documentation? But if
it has to be C, the suggested solutions are possible.
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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