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/* search.c
Free software by Richard W.E. Furse. Do with as you will. No
warranty. */
/*****************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <dirent.h>
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include <glib.h>
/*****************************************************************************/
#include "ladspa.h"
#include "utils.h"
/*****************************************************************************/
/* Search just the one directory. */
static void
LADSPADirectoryPluginSearch
(const char *pcDirectory,
LADSPAPluginSearchCallbackFunction fCallbackFunction)
{
char *pcFilename;
DIR *psDirectory;
LADSPA_Descriptor_Function fDescriptorFunction;
long lDirLength;
long iNeedSlash;
struct dirent *psDirectoryEntry;
void *pvPluginHandle;
lDirLength = strlen (pcDirectory);
if (!lDirLength)
return;
if (pcDirectory[lDirLength - 1] == '/')
iNeedSlash = 0;
else
iNeedSlash = 1;
psDirectory = opendir (pcDirectory);
if (!psDirectory)
return;
while (1) {
psDirectoryEntry = readdir (psDirectory);
if (!psDirectoryEntry) {
closedir (psDirectory);
return;
}
pcFilename = malloc (lDirLength + strlen (psDirectoryEntry->d_name)
+ 1 + iNeedSlash);
strcpy (pcFilename, pcDirectory);
if (iNeedSlash)
strcat (pcFilename, "/");
strcat (pcFilename, psDirectoryEntry->d_name);
pvPluginHandle = dlopen (pcFilename, RTLD_LAZY);
if (pvPluginHandle) {
/* This is a file and the file is a shared library! */
dlerror ();
fDescriptorFunction
= (LADSPA_Descriptor_Function) dlsym (pvPluginHandle,
"ladspa_descriptor");
if (dlerror () == NULL && fDescriptorFunction) {
/* We've successfully found a ladspa_descriptor function. Pass
it to the callback function. */
fCallbackFunction (pcFilename, pvPluginHandle, fDescriptorFunction);
} else {
/* It was a library, but not a LADSPA one. Unload it. */
dlclose (pvPluginHandle);
}
}
free (pcFilename);
}
}
/*****************************************************************************/
void
LADSPAPluginSearch (LADSPAPluginSearchCallbackFunction fCallbackFunction)
{
char *pcBuffer;
const char *pcEnd;
const char *pcLADSPAPath;
const char *pcStart;
/* thomasvs: I'm sorry, but I'm going to add glib stuff here.
* I'm appending logical values for LADSPA_PATH here
*/
pcLADSPAPath = g_strdup_printf ("%s:/usr/lib/ladspa:/usr/local/lib/ladspa",
getenv ("LADSPA_PATH"));
if (!pcLADSPAPath) {
/* fprintf(stderr, */
/* "Warning: You do not have a LADSPA_PATH " */
/* "environment variable set.\n"); */
return;
}
pcStart = pcLADSPAPath;
while (*pcStart != '\0') {
pcEnd = pcStart;
while (*pcEnd != ':' && *pcEnd != '\0')
pcEnd++;
pcBuffer = malloc (1 + pcEnd - pcStart);
if (pcEnd > pcStart)
strncpy (pcBuffer, pcStart, pcEnd - pcStart);
pcBuffer[pcEnd - pcStart] = '\0';
LADSPADirectoryPluginSearch (pcBuffer, fCallbackFunction);
free (pcBuffer);
pcStart = pcEnd;
if (*pcStart == ':')
pcStart++;
}
g_free ((gpointer) pcLADSPAPath);
}
/*****************************************************************************/
/* EOF */
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