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jack2/common/JackDriverLoader.cpp

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  1. /*

  2. Copyright (C) 2001-2005 Paul Davis

  3. Copyright (C) 2004-2008 Grame

  4. 

  5. This program is free software; you can redistribute it and/or modify

  6. it under the terms of the GNU General Public License as published by

  7. the Free Software Foundation; either version 2 of the License, or

  8. (at your option) any later version.

  9. 

  10. This program is distributed in the hope that it will be useful,

  11. but WITHOUT ANY WARRANTY; without even the implied warranty of

  12. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  13. GNU General Public License for more details.

  14. 

  15. You should have received a copy of the GNU General Public License

  16. along with this program; if not, write to the Free Software

  17. Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  18. 

  19. */

  20. 

  21. #include "JackSystemDeps.h"

  22. #include "JackDriverLoader.h"

  23. #include "JackConstants.h"

  24. #include "JackError.h"

  25. #include <getopt.h>

  26. #include <stdio.h>

  27. #include <errno.h>

  28. 

  29. #ifndef WIN32

  30. #include <dirent.h>

  31. #endif

  32. 

  33. jack_driver_desc_t * jackctl_driver_get_desc(jackctl_driver_t * driver);

  34. 

  35. SERVER_EXPORT void jack_print_driver_options (jack_driver_desc_t* desc, FILE* file)

  36. {

  37.     unsigned long i;

  38.     char arg_default[JACK_DRIVER_PARAM_STRING_MAX + 1];

  39. 

  40.     for (i = 0; i < desc->nparams; i++) {

  41.         switch (desc->params[i].type) {

  42.             case JackDriverParamInt:

  43.                 sprintf (arg_default, "%" "i", desc->params[i].value.i);

  44.                 break;

  45.             case JackDriverParamUInt:

  46.                 sprintf (arg_default, "%" "u", desc->params[i].value.ui);

  47.                 break;

  48.             case JackDriverParamChar:

  49.                 sprintf (arg_default, "%c", desc->params[i].value.c);

  50.                 break;

  51.             case JackDriverParamString:

  52.                 if (desc->params[i].value.str && strcmp (desc->params[i].value.str, "") != 0)

  53.                     sprintf (arg_default, "%s", desc->params[i].value.str);

  54.                 else

  55.                     sprintf (arg_default, "none");

  56.                 break;

  57.             case JackDriverParamBool:

  58.                 sprintf (arg_default, "%s", desc->params[i].value.i ? "true" : "false");

  59.                 break;

  60.         }

  61. 

  62.         fprintf (file, "\t-%c, --%s \t%s (default: %s)\n",

  63.                  desc->params[i].character,

  64.                  desc->params[i].name,

  65.                  desc->params[i].short_desc,

  66.                  arg_default);

  67.     }

  68. }

  69. 

  70. static void

  71. jack_print_driver_param_usage (jack_driver_desc_t * desc, unsigned long param, FILE *file)

  72. {

  73.     fprintf (file, "Usage information for the '%s' parameter for driver '%s':\n",

  74.              desc->params[param].name, desc->name);

  75.     fprintf (file, "%s\n", desc->params[param].long_desc);

  76. }

  77. 

  78. SERVER_EXPORT void jack_free_driver_params(JSList * driver_params)

  79. {

  80.     JSList *node_ptr = driver_params;

  81.     JSList *next_node_ptr;

  82. 

  83.     while (node_ptr) {

  84.         next_node_ptr = node_ptr->next;

  85.         free(node_ptr->data);

  86.         free(node_ptr);

  87.         node_ptr = next_node_ptr;

  88.     }

  89. }

  90. 

  91. int

  92. jack_parse_driver_params (jack_driver_desc_t * desc, int argc, char* argv[], JSList ** param_ptr)

  93. {

  94.     struct option * long_options;

  95.     char * options, * options_ptr;

  96.     unsigned long i;

  97.     int opt;

  98.     unsigned int param_index;

  99.     JSList * params = NULL;

  100.     jack_driver_param_t * driver_param;

  101. 

  102.     if (argc <= 1) {

  103.         *param_ptr = NULL;

  104.         return 0;

  105.     }

  106. 

  107.     /* check for help */

  108.     if (strcmp (argv[1], "-h") == 0 || strcmp (argv[1], "--help") == 0) {

  109.         if (argc > 2) {

  110.             for (i = 0; i < desc->nparams; i++) {

  111.                 if (strcmp (desc->params[i].name, argv[2]) == 0) {

  112.                     jack_print_driver_param_usage (desc, i, stdout);

  113.                     return 1;

  114.                 }

  115.             }

  116. 

  117.             fprintf (stderr, "jackd: unknown option '%s' "

  118.                      "for driver '%s'\n", argv[2],

  119.                      desc->name);

  120.         }

  121. 

  122.         printf ("Parameters for driver '%s' (all parameters are optional):\n", desc->name);

  123.         jack_print_driver_options (desc, stdout);

  124.         return 1;

  125.     }

  126. 

  127.     /* set up the stuff for getopt */

  128.     options = (char*)calloc (desc->nparams * 3 + 1, sizeof (char));

  129.     long_options = (option*)calloc (desc->nparams + 1, sizeof (struct option));

  130. 

  131.     options_ptr = options;

  132.     for (i = 0; i < desc->nparams; i++) {

  133.         sprintf (options_ptr, "%c::", desc->params[i].character);

  134.         options_ptr += 3;

  135.         long_options[i].name = desc->params[i].name;

  136.         long_options[i].flag = NULL;

  137.         long_options[i].val = desc->params[i].character;

  138.         long_options[i].has_arg = optional_argument;

  139.     }

  140. 

  141.     /* create the params */

  142.     optind = 0;

  143.     opterr = 0;

  144.     while ((opt = getopt_long(argc, argv, options, long_options, NULL)) != -1) {

  145. 

  146.         if (opt == ':' || opt == '?') {

  147.             if (opt == ':') {

  148.                 fprintf (stderr, "Missing option to argument '%c'\n", optopt);

  149.             } else {

  150.                 fprintf (stderr, "Unknownage with option '%c'\n", optopt);

  151.             }

  152. 

  153.             fprintf (stderr, "Options for driver '%s':\n", desc->name);

  154.             jack_print_driver_options (desc, stderr);

  155.             exit (1);

  156.         }

  157. 

  158.         for (param_index = 0; param_index < desc->nparams; param_index++) {

  159.             if (opt == desc->params[param_index].character) {

  160.                 break;

  161.             }

  162.         }

  163. 

  164.         driver_param = (jack_driver_param_t*)calloc (1, sizeof (jack_driver_param_t));

  165.         driver_param->character = desc->params[param_index].character;

  166. 

  167.         if (!optarg && optind < argc &&

  168.                 strlen(argv[optind]) &&

  169.                 argv[optind][0] != '-') {

  170.             optarg = argv[optind];

  171.         }

  172. 

  173.         if (optarg) {

  174.             switch (desc->params[param_index].type) {

  175.                 case JackDriverParamInt:

  176.                     driver_param->value.i = atoi (optarg);

  177.                     break;

  178.                 case JackDriverParamUInt:

  179.                     driver_param->value.ui = strtoul (optarg, NULL, 10);

  180.                     break;

  181.                 case JackDriverParamChar:

  182.                     driver_param->value.c = optarg[0];

  183.                     break;

  184.                 case JackDriverParamString:

  185.                     strncpy (driver_param->value.str, optarg, JACK_DRIVER_PARAM_STRING_MAX);

  186.                     break;

  187.                 case JackDriverParamBool:

  188. 

  189.                     /*

  190.                                 if (strcasecmp ("false", optarg) == 0 ||

  191.                                         strcasecmp ("off", optarg) == 0 ||

  192.                                         strcasecmp ("no", optarg) == 0 ||

  193.                                         strcasecmp ("0", optarg) == 0 ||

  194.                                         strcasecmp ("(null)", optarg) == 0 ) {

  195.                     */

  196.                     // steph

  197.                     if (strcmp ("false", optarg) == 0 ||

  198.                             strcmp ("off", optarg) == 0 ||

  199.                             strcmp ("no", optarg) == 0 ||

  200.                             strcmp ("0", optarg) == 0 ||

  201.                             strcmp ("(null)", optarg) == 0 ) {

  202.                         driver_param->value.i = false;

  203. 

  204.                     } else {

  205. 

  206.                         driver_param->value.i = true;

  207. 

  208.                     }

  209.                     break;

  210.             }

  211.         } else {

  212.             if (desc->params[param_index].type == JackDriverParamBool) {

  213.                 driver_param->value.i = true;

  214.             } else {

  215.                 driver_param->value = desc->params[param_index].value;

  216.             }

  217.         }

  218. 

  219.         params = jack_slist_append (params, driver_param);

  220.     }

  221. 

  222.     free (options);

  223.     free (long_options);

  224. 

  225.     if (param_ptr)

  226.         *param_ptr = params;

  227. 

  228.     return 0;

  229. }

  230. 

  231. SERVER_EXPORT int

  232. jackctl_parse_driver_params (jackctl_driver *driver_ptr, int argc, char* argv[])

  233. {

  234.     struct option * long_options;

  235.     char * options, * options_ptr;

  236.     unsigned long i;

  237.     int opt;

  238.     JSList * node_ptr;

  239.     jackctl_parameter_t * param = NULL;

  240.     union jackctl_parameter_value value;

  241. 

  242.     if (argc <= 1)

  243.         return 0;

  244. 

  245.     const JSList * driver_params = jackctl_driver_get_parameters(driver_ptr);

  246.     if (driver_params == NULL)

  247.         return 1;

  248. 

  249.     jack_driver_desc_t * desc = jackctl_driver_get_desc(driver_ptr);

  250. 

  251.     /* check for help */

  252.     if (strcmp (argv[1], "-h") == 0 || strcmp (argv[1], "--help") == 0) {

  253.         if (argc > 2) {

  254.             for (i = 0; i < desc->nparams; i++) {

  255.                 if (strcmp (desc->params[i].name, argv[2]) == 0) {

  256.                     jack_print_driver_param_usage (desc, i, stdout);

  257.                     return 1;

  258.                 }

  259.             }

  260. 

  261.             fprintf (stderr, "jackd: unknown option '%s' "

  262.                      "for driver '%s'\n", argv[2],

  263.                      desc->name);

  264.         }

  265. 

  266.         printf ("Parameters for driver '%s' (all parameters are optional):\n", desc->name);

  267.         jack_print_driver_options (desc, stdout);

  268.         return 1;

  269.     }

  270. 

  271.    /* set up the stuff for getopt */

  272.     options = (char*)calloc (desc->nparams * 3 + 1, sizeof (char));

  273.     long_options = (option*)calloc (desc->nparams + 1, sizeof (struct option));

  274. 

  275.     options_ptr = options;

  276.     for (i = 0; i < desc->nparams; i++) {

  277.         sprintf (options_ptr, "%c::", desc->params[i].character);

  278.         options_ptr += 3;

  279.         long_options[i].name = desc->params[i].name;

  280.         long_options[i].flag = NULL;

  281.         long_options[i].val = desc->params[i].character;

  282.         long_options[i].has_arg = optional_argument;

  283.     }

  284. 

  285.     /* create the params */

  286.     optind = 0;

  287.     opterr = 0;

  288.     while ((opt = getopt_long(argc, argv, options, long_options, NULL)) != -1) {

  289. 

  290.         if (opt == ':' || opt == '?') {

  291.             if (opt == ':') {

  292.                 fprintf (stderr, "Missing option to argument '%c'\n", optopt);

  293.             } else {

  294.                 fprintf (stderr, "Unknownage with option '%c'\n", optopt);

  295.             }

  296. 

  297.             fprintf (stderr, "Options for driver '%s':\n", desc->name);

  298.             jack_print_driver_options(desc, stderr);

  299.             return 1;

  300.         }

  301. 

  302.         node_ptr = (JSList *)driver_params;

  303.        	while (node_ptr) {

  304.             param = (jackctl_parameter_t*)node_ptr->data;

  305.             if (opt == jackctl_parameter_get_id(param)) {

  306.                 break;

  307.             }

  308.             node_ptr = node_ptr->next;

  309.         }

  310. 

  311.         if (!optarg && optind < argc &&

  312.             strlen(argv[optind]) &&

  313.             argv[optind][0] != '-') {

  314.             optarg = argv[optind];

  315.         }

  316. 

  317.         if (optarg) {

  318.             switch (jackctl_parameter_get_type(param)) {

  319.                 case JackDriverParamInt:

  320.                     value.i = atoi (optarg);

  321.                     jackctl_parameter_set_value(param, &value);

  322.                     break;

  323.                 case JackDriverParamUInt:

  324.                     value.ui = strtoul (optarg, NULL, 10);

  325.                     jackctl_parameter_set_value(param, &value);

  326.                     break;

  327.                 case JackDriverParamChar:

  328.                     value.c = optarg[0];

  329.                     jackctl_parameter_set_value(param, &value);

  330.                     break;

  331.                 case JackDriverParamString:

  332.                     strncpy (value.str, optarg, JACK_DRIVER_PARAM_STRING_MAX);

  333.                     jackctl_parameter_set_value(param, &value);

  334.                     break;

  335.                 case JackDriverParamBool:

  336.                     /*

  337.                      if (strcasecmp ("false", optarg) == 0 ||

  338.                          strcasecmp ("off", optarg) == 0 ||

  339.                          strcasecmp ("no", optarg) == 0 ||

  340.                          strcasecmp ("0", optarg) == 0 ||

  341.                          strcasecmp ("(null)", optarg) == 0 ) {

  342.                     */

  343.                     // steph

  344.                     if (strcmp ("false", optarg) == 0 ||

  345.                         strcmp ("off", optarg) == 0 ||

  346.                         strcmp ("no", optarg) == 0 ||

  347.                         strcmp ("0", optarg) == 0 ||

  348.                         strcmp ("(null)", optarg) == 0 ) {

  349.                         value.i = false;

  350.                     } else {

  351.                         value.i = true;

  352.                     }

  353.                     jackctl_parameter_set_value(param, &value);

  354.                     break;

  355.             }

  356.         } else {

  357.             if (jackctl_parameter_get_type(param) == JackParamBool) {

  358.                 value.i = true;

  359.             } else {

  360.                 value = jackctl_parameter_get_default_value(param);

  361.             }

  362.             jackctl_parameter_set_value(param, &value);

  363.         }

  364.     }

  365. 

  366.     free(options);

  367.     free(long_options);

  368.     return 0;

  369. }

  370. 

  371. jack_driver_desc_t *

  372. jack_find_driver_descriptor (JSList * drivers, const char * name)

  373. {

  374.     jack_driver_desc_t * desc = 0;

  375.     JSList * node;

  376. 

  377.     for (node = drivers; node; node = jack_slist_next (node)) {

  378.         desc = (jack_driver_desc_t *) node->data;

  379. 

  380.         if (strcmp (desc->name, name) != 0) {

  381.             desc = NULL;

  382.         } else {

  383.             break;

  384.         }

  385.     }

  386. 

  387.     return desc;

  388. }

  389. 

  390. static jack_driver_desc_t *

  391. jack_get_descriptor (JSList * drivers, const char * sofile, const char * symbol)

  392. {

  393.     jack_driver_desc_t * descriptor, * other_descriptor;

  394.     JackDriverDescFunction so_get_descriptor = NULL;

  395.     JSList * node;

  396.     void * dlhandle;

  397.     char * filename;

  398. #ifdef WIN32

  399.     int dlerr;

  400. #else

  401.     const char * dlerr;

  402. #endif

  403. 

  404.     int err;

  405.     const char* driver_dir;

  406. 

  407.     if ((driver_dir = getenv("JACK_DRIVER_DIR")) == 0) {

  408.         // for WIN32 ADDON_DIR is defined in JackConstants.h as relative path

  409.         // for posix systems, it is absolute path of default driver dir

  410. #ifdef WIN32

  411.         char temp_driver_dir1[512];

  412.         char temp_driver_dir2[512];

  413.         GetCurrentDirectory(512, temp_driver_dir1);

  414.         sprintf(temp_driver_dir2, "%s/%s", temp_driver_dir1, ADDON_DIR);

  415.         driver_dir = temp_driver_dir2;

  416. #else

  417.         driver_dir = ADDON_DIR;

  418. #endif

  419.     }

  420. 

  421.     filename = (char *)malloc(strlen (driver_dir) + 1 + strlen(sofile) + 1);

  422.     sprintf (filename, "%s/%s", driver_dir, sofile);

  423. 

  424.     if ((dlhandle = LoadDriverModule(filename)) == NULL) {

  425. #ifdef WIN32

  426.         jack_error ("could not open driver .dll '%s': %ld", filename, GetLastError());

  427. #else

  428.         jack_error ("could not open driver .so '%s': %s", filename, dlerror());

  429. #endif

  430. 

  431.         free(filename);

  432.         return NULL;

  433.     }

  434. 

  435.     so_get_descriptor = (JackDriverDescFunction)

  436.                         GetProc(dlhandle, symbol);

  437. 

  438. #ifdef WIN32

  439.     if ((so_get_descriptor == NULL) && (dlerr = GetLastError()) != 0) {

  440.         jack_log("jack_get_descriptor : dll is not a driver, err = %ld", dlerr);

  441. #else

  442.     if ((so_get_descriptor == NULL) && (dlerr = dlerror ()) != NULL) {

  443.         jack_log("jack_get_descriptor err = %s", dlerr);

  444. #endif

  445. 

  446.         UnloadDriverModule(dlhandle);

  447.         free(filename);

  448.         return NULL;

  449.     }

  450. 

  451.     if ((descriptor = so_get_descriptor ()) == NULL) {

  452.         jack_error("driver from '%s' returned NULL descriptor", filename);

  453.         UnloadDriverModule(dlhandle);

  454.         free(filename);

  455.         return NULL;

  456.     }

  457. 

  458. #ifdef WIN32

  459.     if ((err = UnloadDriverModule(dlhandle)) == 0) {

  460.         jack_error ("error closing driver .so '%s': %ld", filename, GetLastError ());

  461.     }

  462. #else

  463.     if ((err = UnloadDriverModule(dlhandle)) != 0) {

  464.         jack_error ("error closing driver .so '%s': %s", filename, dlerror ());

  465.     }

  466. #endif

  467. 

  468.     /* check it doesn't exist already */

  469.     for (node = drivers; node; node = jack_slist_next (node)) {

  470.         other_descriptor = (jack_driver_desc_t *) node->data;

  471. 

  472.         if (strcmp(descriptor->name, other_descriptor->name) == 0) {

  473.             jack_error("the drivers in '%s' and '%s' both have the name '%s'; using the first",

  474.                        other_descriptor->file, filename, other_descriptor->name);

  475.             /* FIXME: delete the descriptor */

  476.             free(filename);

  477.             return NULL;

  478.         }

  479.     }

  480. 

  481.     strncpy(descriptor->file, filename, JACK_PATH_MAX);

  482.     free(filename);

  483.     return descriptor;

  484. }

  485. 

  486. static bool check_symbol(const char* sofile, const char* symbol)

  487. {

  488.     void * dlhandle;

  489.     bool res = false;

  490.     const char* driver_dir;

  491. 

  492.     if ((driver_dir = getenv("JACK_DRIVER_DIR")) == 0) {

  493.         // for WIN32 ADDON_DIR is defined in JackConstants.h as relative path

  494.         // for posix systems, it is absolute path of default driver dir

  495. #ifdef WIN32

  496.         char temp_driver_dir1[512];

  497.         char temp_driver_dir2[512];

  498.         GetCurrentDirectory(512, temp_driver_dir1);

  499.         sprintf(temp_driver_dir2, "%s/%s", temp_driver_dir1, ADDON_DIR);

  500.         driver_dir = temp_driver_dir2;

  501. #else

  502.         driver_dir = ADDON_DIR;

  503. #endif

  504.     }

  505. 

  506.     char* filename = (char *)malloc(strlen (driver_dir) + 1 + strlen(sofile) + 1);

  507.     sprintf (filename, "%s/%s", driver_dir, sofile);

  508. 

  509.     if ((dlhandle = LoadDriverModule(filename)) == NULL) {

  510. #ifdef WIN32

  511.         jack_error ("could not open component .dll '%s': %ld", filename, GetLastError());

  512. #else

  513.         jack_error ("could not open component .so '%s': %s", filename, dlerror());

  514. #endif

  515.      } else {

  516.         res = (GetProc(dlhandle, symbol)) ? true : false;

  517.         UnloadDriverModule(dlhandle);

  518.     }

  519. 

  520.     free(filename);

  521.     return res;

  522. }

  523. 

  524. #ifdef WIN32

  525. 

  526. JSList *

  527. jack_drivers_load (JSList * drivers) {

  528.     char * driver_dir;

  529.     char driver_dir_storage[512];

  530.     char dll_filename[512];

  531.     WIN32_FIND_DATA filedata;

  532.     HANDLE file;

  533.     const char * ptr = NULL;

  534.     JSList * driver_list = NULL;

  535.     jack_driver_desc_t * desc;

  536. 

  537.     if ((driver_dir = getenv("JACK_DRIVER_DIR")) == 0) {

  538.         // for WIN32 ADDON_DIR is defined in JackConstants.h as relative path

  539.         GetCurrentDirectory(512, driver_dir_storage);

  540.         strcat(driver_dir_storage, "/");

  541.         strcat(driver_dir_storage, ADDON_DIR);

  542.         driver_dir = driver_dir_storage;

  543.     }

  544. 

  545.     sprintf(dll_filename, "%s/*.dll", driver_dir);

  546. 

  547.     file = (HANDLE )FindFirstFile(dll_filename, &filedata);

  548. 

  549.     if (file == INVALID_HANDLE_VALUE) {

  550.         jack_error("error invalid handle");

  551.         return NULL;

  552.     }

  553. 

  554.     do {

  555.         ptr = strrchr (filedata.cFileName, '.');

  556.         if (!ptr) {

  557.             continue;

  558.         }

  559.         ptr++;

  560.         if (strncmp ("dll", ptr, 3) != 0) {

  561.             continue;

  562.         }

  563. 

  564.         desc = jack_get_descriptor (drivers, filedata.cFileName, "driver_get_descriptor");

  565.         if (desc) {

  566.             driver_list = jack_slist_append (driver_list, desc);

  567.         }

  568. 

  569.     } while (FindNextFile(file, &filedata));

  570. 

  571.     if (!driver_list) {

  572.         jack_error ("could not find any drivers in %s!", driver_dir);

  573.         return NULL;

  574.     }

  575. 

  576.     return driver_list;

  577. }

  578. 

  579. #else

  580. 

  581. JSList *

  582. jack_drivers_load (JSList * drivers) {

  583.     struct dirent * dir_entry;

  584.     DIR * dir_stream;

  585.     const char * ptr;

  586.     int err;

  587.     JSList * driver_list = NULL;

  588.     jack_driver_desc_t * desc;

  589. 

  590.     const char* driver_dir;

  591.     if ((driver_dir = getenv("JACK_DRIVER_DIR")) == 0) {

  592.         driver_dir = ADDON_DIR;

  593.     }

  594. 

  595.     /* search through the driver_dir and add get descriptors

  596.     from the .so files in it */

  597.     dir_stream = opendir (driver_dir);

  598.     if (!dir_stream) {

  599.         jack_error ("could not open driver directory %s: %s",

  600.                     driver_dir, strerror (errno));

  601.         return NULL;

  602.     }

  603. 

  604.     while ((dir_entry = readdir(dir_stream))) {

  605. 

  606.         /* check the filename is of the right format */

  607.         if (strncmp ("jack_", dir_entry->d_name, 5) != 0) {

  608.             continue;

  609.         }

  610. 

  611.         ptr = strrchr (dir_entry->d_name, '.');

  612.         if (!ptr) {

  613.             continue;

  614.         }

  615.         ptr++;

  616.         if (strncmp ("so", ptr, 2) != 0) {

  617.             continue;

  618.         }

  619. 

  620.         desc = jack_get_descriptor (drivers, dir_entry->d_name, "driver_get_descriptor");

  621.         if (desc) {

  622.             driver_list = jack_slist_append (driver_list, desc);

  623.         }

  624.     }

  625. 

  626.     err = closedir (dir_stream);

  627.     if (err) {

  628.         jack_error ("error closing driver directory %s: %s",

  629.                     driver_dir, strerror (errno));

  630.     }

  631. 

  632.     if (!driver_list) {

  633.         jack_error ("could not find any drivers in %s!", driver_dir);

  634.         return NULL;

  635.     }

  636. 

  637.     return driver_list;

  638. }

  639. 

  640. #endif

  641. 

  642. #ifdef WIN32

  643. 

  644. JSList *

  645. jack_internals_load (JSList * internals) {

  646.     char * driver_dir;

  647.     char driver_dir_storage[512];

  648.     char dll_filename[512];

  649.     WIN32_FIND_DATA filedata;

  650.     HANDLE file;

  651.     const char * ptr = NULL;

  652.     JSList * driver_list = NULL;

  653.     jack_driver_desc_t * desc;

  654. 

  655.     if ((driver_dir = getenv("JACK_DRIVER_DIR")) == 0) {

  656.         // for WIN32 ADDON_DIR is defined in JackConstants.h as relative path

  657.         GetCurrentDirectory(512, driver_dir_storage);

  658.         strcat(driver_dir_storage, "/");

  659.         strcat(driver_dir_storage, ADDON_DIR);

  660.         driver_dir = driver_dir_storage;

  661.     }

  662. 

  663.     sprintf(dll_filename, "%s/*.dll", driver_dir);

  664. 

  665.     file = (HANDLE )FindFirstFile(dll_filename, &filedata);

  666. 

  667.     if (file == INVALID_HANDLE_VALUE) {

  668.         jack_error("error");

  669.         return NULL;

  670.     }

  671. 

  672.     do {

  673. 

  674.         ptr = strrchr (filedata.cFileName, '.');

  675.         if (!ptr) {

  676.             continue;

  677.         }

  678.         ptr++;

  679.         if (strncmp ("dll", ptr, 3) != 0) {

  680.             continue;

  681.         }

  682. 

  683.         /* check if dll is an internal client */

  684.         if (!check_symbol(filedata.cFileName, "jack_internal_initialize")) {

  685.              continue;

  686.         }

  687. 

  688.         desc = jack_get_descriptor (internals, filedata.cFileName, "jack_get_descriptor");

  689.         if (desc) {

  690.             driver_list = jack_slist_append (driver_list, desc);

  691.         }

  692. 

  693.     } while (FindNextFile(file, &filedata));

  694. 

  695.     if (!driver_list) {

  696.         jack_error ("could not find any internals in %s!", driver_dir);

  697.         return NULL;

  698.     }

  699. 

  700.     return driver_list;

  701. }

  702. 

  703. #else

  704. 

  705. JSList *

  706. jack_internals_load (JSList * internals) {

  707.     struct dirent * dir_entry;

  708.     DIR * dir_stream;

  709.     const char * ptr;

  710.     int err;

  711.     JSList * driver_list = NULL;

  712.     jack_driver_desc_t * desc;

  713. 

  714.     const char* driver_dir;

  715.     if ((driver_dir = getenv("JACK_DRIVER_DIR")) == 0) {

  716.         driver_dir = ADDON_DIR;

  717.     }

  718. 

  719.     /* search through the driver_dir and add get descriptors

  720.     from the .so files in it */

  721.     dir_stream = opendir (driver_dir);

  722.     if (!dir_stream) {

  723.         jack_error ("could not open driver directory %s: %s\n",

  724.                     driver_dir, strerror (errno));

  725.         return NULL;

  726.     }

  727. 

  728.     while ((dir_entry = readdir(dir_stream))) {

  729. 

  730.         ptr = strrchr (dir_entry->d_name, '.');

  731.         if (!ptr) {

  732.             continue;

  733.         }

  734.         ptr++;

  735.         if (strncmp ("so", ptr, 2) != 0) {

  736.             continue;

  737.         }

  738. 

  739.         /* check if dll is an internal client */

  740.         if (!check_symbol(dir_entry->d_name, "jack_internal_initialize")) {

  741.              continue;

  742.         }

  743. 

  744.         desc = jack_get_descriptor (internals, dir_entry->d_name, "jack_get_descriptor");

  745.         if (desc) {

  746.             driver_list = jack_slist_append (driver_list, desc);

  747.         }

  748.     }

  749. 

  750.     err = closedir (dir_stream);

  751.     if (err) {

  752.         jack_error ("error closing internal directory %s: %s\n",

  753.                     driver_dir, strerror (errno));

  754.     }

  755. 

  756.     if (!driver_list) {

  757.         jack_error ("could not find any internals in %s!", driver_dir);

  758.         return NULL;

  759.     }

  760. 

  761.     return driver_list;

  762. }

  763. 

  764. #endif

  765. 

  766. Jack::JackDriverClientInterface* JackDriverInfo::Open(jack_driver_desc_t* driver_desc, 

  767.                                                     Jack::JackLockedEngine* engine, 

  768.                                                     Jack::JackSynchro* synchro, 

  769.                                                     const JSList* params)

  770. {

  771. #ifdef WIN32

  772.     int errstr;

  773. #else

  774.     const char * errstr;

  775. #endif

  776. 

  777.     fHandle = LoadDriverModule (driver_desc->file);

  778.     

  779.     if (fHandle == NULL) {

  780. #ifdef WIN32

  781.         if ((errstr = GetLastError ()) != 0) {

  782.             jack_error ("can't load \"%s\": %ld", driver_desc->file, errstr);

  783. #else

  784.         if ((errstr = dlerror ()) != 0) {

  785.             jack_error ("can't load \"%s\": %s", driver_desc->file, errstr);

  786. #endif

  787. 

  788.         } else {

  789.             jack_error ("bizarre error loading driver shared object %s", driver_desc->file);

  790.         }

  791.         return NULL;

  792.     }

  793. 

  794.     fInitialize = (driverInitialize)GetProc(fHandle, "driver_initialize");

  795. 

  796. #ifdef WIN32

  797.     if ((fInitialize == NULL) && (errstr = GetLastError ()) != 0) {

  798. #else

  799.     if ((fInitialize == NULL) && (errstr = dlerror ()) != 0) {

  800. #endif

  801.         jack_error("no initialize function in shared object %s\n", driver_desc->file);

  802.         return NULL;

  803.     }

  804. 

  805.     return fInitialize(engine, synchro, params);

  806. }