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livetrax/libs/pbd/pathscanner.cc

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/*
Copyright (C) 1998-99 Paul Barton-Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id$
*/
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <vector>
#include <dirent.h>
#include "pbd/error.h"
#include "pbd/pathscanner.h"
#include "pbd/stl_delete.h"
using namespace PBD;
vector<string *> *
PathScanner::operator() (const string &dirpath, const string &regexp,
bool match_fullpath, bool return_fullpath,
long limit)
{
int err;
char msg[256];
if ((err = regcomp (&compiled_pattern, regexp.c_str(),
REG_EXTENDED|REG_NOSUB))) {
regerror (err, &compiled_pattern,
msg, sizeof (msg));
error << "Cannot compile soundfile regexp for use ("
<< msg
<< ")"
<< endmsg;
return 0;
}
return run_scan (dirpath, &PathScanner::regexp_filter,
(bool (*)(const string &, void *)) 0,
0,
match_fullpath,
return_fullpath,
limit);
}
vector<string *> *
PathScanner::run_scan (const string &dirpath,
bool (PathScanner::*memberfilter)(const string &),
bool (*filter)(const string &, void *),
void *arg,
bool match_fullpath, bool return_fullpath,
long limit)
{
vector<string *> *result = 0;
DIR *dir;
struct dirent *finfo;
char *pathcopy = strdup (dirpath.c_str());
char *thisdir;
char fullpath[PATH_MAX+1];
string search_str;
string *newstr;
long nfound = 0;
if ((thisdir = strtok (pathcopy, ":")) == 0 ||
strlen (thisdir) == 0) {
free (pathcopy);
return 0;
}
result = new vector<string *>;
do {
if ((dir = opendir (thisdir)) == 0) {
continue;
}
while ((finfo = readdir (dir)) != 0) {
snprintf (fullpath, sizeof(fullpath), "%s/%s",
thisdir, finfo->d_name);
if (match_fullpath) {
search_str = fullpath;
} else {
search_str = finfo->d_name;
}
/* handle either type of function ptr */
if (memberfilter) {
if (!(this->*memberfilter)(search_str)) {
continue;
}
} else {
if (!filter(search_str, arg)) {
continue;
}
}
if (return_fullpath) {
newstr = new string (fullpath);
} else {
newstr = new string (finfo->d_name);
}
result->push_back (newstr);
nfound++;
}
closedir (dir);
} while ((limit < 0 || (nfound < limit)) && (thisdir = strtok (0, ":")));
free (pathcopy);
return result;
}
string *
PathScanner::find_first (const string &dirpath,
const string &regexp,
bool match_fullpath,
bool return_fullpath)
{
vector<string *> *res;
string *ret;
int err;
char msg[256];
if ((err = regcomp (&compiled_pattern, regexp.c_str(),
REG_EXTENDED|REG_NOSUB))) {
regerror (err, &compiled_pattern,
msg, sizeof (msg));
error << "Cannot compile soundfile regexp for use (" << msg << ")" << endmsg;
return 0;
}
res = run_scan (dirpath,
&PathScanner::regexp_filter,
(bool (*)(const string &, void *)) 0,
0,
match_fullpath,
return_fullpath,
1);
if (res->size() == 0) {
ret = 0;
} else {
ret = res->front();
}
vector_delete (res);
delete res;
return ret;
}
string *
PathScanner::find_first (const string &dirpath,
bool (*filter)(const string &, void *),
void *arg,
bool match_fullpath,
bool return_fullpath)
{
vector<string *> *res;
string *ret;
res = run_scan (dirpath,
(bool (PathScanner::*)(const string &)) 0,
filter,
0,
match_fullpath,
return_fullpath, 1);
if (res->size() == 0) {
ret = 0;
} else {
ret = res->front();
}
vector_delete (res);
delete res;
return ret;
}