shell_tinyxml_read.cpp 19 KB

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  1. ////////////////////////////////////////
  2. // shell_tinyxml_read.cpp
  3. //
  4. // This file implements the means to read an XML encoded file and populate the
  5. // CLI tree based on the contents.
  6. ////////////////////////////////////////
  7. extern "C" {
  8. #include "private.h"
  9. #include "lub/string.h"
  10. #include "lub/ctype.h"
  11. }
  12. /*lint +libh(tinyxml/tinyxml.h) Add this to the library file list */
  13. #include "tinyxml/tinyxml.h"
  14. #include <string.h>
  15. #include <assert.h>
  16. typedef void (PROCESS_FN) (clish_shell_t * instance,
  17. TiXmlElement * element, void *parent);
  18. // Define a control block for handling the decode of an XML file
  19. typedef struct clish_xml_cb_s clish_xml_cb_t;
  20. struct clish_xml_cb_s {
  21. const char *element;
  22. PROCESS_FN *handler;
  23. };
  24. // forward declare the handler functions
  25. static PROCESS_FN
  26. process_clish_module,
  27. process_startup,
  28. process_view,
  29. process_command,
  30. process_param,
  31. process_action,
  32. process_ptype,
  33. process_overview, process_detail, process_namespace, process_config;
  34. static clish_xml_cb_t xml_elements[] = {
  35. {"CLISH_MODULE", process_clish_module},
  36. {"STARTUP", process_startup},
  37. {"VIEW", process_view},
  38. {"COMMAND", process_command},
  39. {"PARAM", process_param},
  40. {"ACTION", process_action},
  41. {"PTYPE", process_ptype},
  42. {"OVERVIEW", process_overview},
  43. {"DETAIL", process_detail},
  44. {"NAMESPACE", process_namespace},
  45. {"CONFIG", process_config},
  46. {NULL, NULL}
  47. };
  48. ///////////////////////////////////////
  49. // This function reads an element from the XML stream and processes it.
  50. ///////////////////////////////////////
  51. static void process_node(clish_shell_t * shell, TiXmlNode * node, void *parent)
  52. {
  53. switch (node->Type()) {
  54. case TiXmlNode::DOCUMENT:
  55. break;
  56. case TiXmlNode::ELEMENT:
  57. clish_xml_cb_t * cb;
  58. for (cb = &xml_elements[0]; cb->element; cb++) {
  59. if (0 == strcmp(node->Value(), cb->element)) {
  60. TiXmlElement *element = (TiXmlElement *) node;
  61. #ifdef DEBUG
  62. fprintf(stderr, "NODE:");
  63. element->Print(stderr, 0);
  64. fprintf(stderr, "\n***\n");
  65. #endif
  66. // process the elements at this level
  67. cb->handler(shell, element, parent);
  68. break;
  69. }
  70. }
  71. break;
  72. case TiXmlNode::COMMENT:
  73. case TiXmlNode::TEXT:
  74. case TiXmlNode::DECLARATION:
  75. case TiXmlNode::TYPECOUNT:
  76. case TiXmlNode::UNKNOWN:
  77. default:
  78. break;
  79. }
  80. }
  81. ///////////////////////////////////////
  82. static void
  83. process_children(clish_shell_t * shell,
  84. TiXmlElement * element, void *parent = NULL)
  85. {
  86. for (TiXmlNode * node = element->FirstChild();
  87. NULL != node; node = element->IterateChildren(node)) {
  88. // Now deal with all the contained elements
  89. process_node(shell, node, parent);
  90. }
  91. }
  92. ///////////////////////////////////////
  93. static void
  94. process_clish_module(clish_shell_t * shell, TiXmlElement * element, void *)
  95. {
  96. // create the global view
  97. if (NULL == shell->global) {
  98. shell->global =
  99. clish_shell_find_create_view(shell, "global", "");
  100. }
  101. process_children(shell, element, shell->global);
  102. }
  103. ///////////////////////////////////////
  104. static void process_view(clish_shell_t * shell, TiXmlElement * element, void *)
  105. {
  106. clish_view_t *view;
  107. const char *name = element->Attribute("name");
  108. const char *prompt = element->Attribute("prompt");
  109. const char *depth = element->Attribute("depth");
  110. const char *restore = element->Attribute("restore");
  111. // re-use a view if it already exists
  112. view = clish_shell_find_create_view(shell, name, prompt);
  113. if ((depth != NULL) && (*depth != '\0') && (lub_ctype_isdigit(*depth))) {
  114. unsigned res = atoi(depth);
  115. clish_view__set_depth(view, res);
  116. }
  117. if (restore) {
  118. if (!lub_string_nocasecmp(restore, "depth"))
  119. clish_view__set_restore(view, CLISH_RESTORE_DEPTH);
  120. else if (!lub_string_nocasecmp(restore, "view"))
  121. clish_view__set_restore(view, CLISH_RESTORE_VIEW);
  122. else
  123. clish_view__set_restore(view, CLISH_RESTORE_NONE);
  124. }
  125. process_children(shell, element, view);
  126. }
  127. ///////////////////////////////////////
  128. static void process_ptype(clish_shell_t * shell, TiXmlElement * element, void *)
  129. {
  130. clish_ptype_method_e method;
  131. clish_ptype_preprocess_e preprocess;
  132. clish_ptype_t *ptype;
  133. const char *name = element->Attribute("name");
  134. const char *help = element->Attribute("help");
  135. const char *pattern = element->Attribute("pattern");
  136. const char *method_name = element->Attribute("method");
  137. const char *preprocess_name = element->Attribute("preprocess");
  138. assert(name);
  139. assert(pattern);
  140. method = clish_ptype_method_resolve(method_name);
  141. preprocess = clish_ptype_preprocess_resolve(preprocess_name);
  142. ptype = clish_shell_find_create_ptype(shell,
  143. name,
  144. help,
  145. pattern, method, preprocess);
  146. assert(ptype);
  147. }
  148. ///////////////////////////////////////
  149. static void
  150. process_overview(clish_shell_t * shell, TiXmlElement * element, void *)
  151. {
  152. // read the following text element
  153. TiXmlNode *text = element->FirstChild();
  154. if (NULL != text) {
  155. assert(TiXmlNode::TEXT == text->Type());
  156. // set the overview text for this view
  157. assert(NULL == shell->overview);
  158. // store the overview
  159. shell->overview = lub_string_dup(text->Value());
  160. }
  161. }
  162. ////////////////////////////////////////
  163. static void
  164. process_command(clish_shell_t * shell, TiXmlElement * element, void *parent)
  165. {
  166. clish_view_t *v = (clish_view_t *) parent;
  167. clish_command_t *cmd = NULL;
  168. bool allowed = true;
  169. clish_command_t *old;
  170. char *alias_name = NULL;
  171. clish_view_t *alias_view = NULL;
  172. const char *access = element->Attribute("access");
  173. const char *name = element->Attribute("name");
  174. const char *help = element->Attribute("help");
  175. const char *view = element->Attribute("view");
  176. const char *viewid = element->Attribute("viewid");
  177. const char *escape_chars = element->Attribute("escape_chars");
  178. const char *args_name = element->Attribute("args");
  179. const char *args_help = element->Attribute("args_help");
  180. const char *lock = element->Attribute("lock");
  181. const char *ref = element->Attribute("ref");
  182. if (NULL != access) {
  183. allowed = false; // err on the side of caution
  184. if (shell->client_hooks->access_fn) {
  185. // get the client to authenticate
  186. allowed =
  187. shell->client_hooks->access_fn(shell,
  188. access) ? true :
  189. false;
  190. }
  191. }
  192. if (!allowed)
  193. return;
  194. old = clish_view_find_command(v, name, BOOL_FALSE);
  195. // check this command doesn't already exist
  196. if (old) {
  197. // flag the duplication then ignore further definition
  198. printf("DUPLICATE COMMAND: %s\n",
  199. clish_command__get_name(old));
  200. return;
  201. }
  202. assert(name);
  203. assert(help);
  204. /* Reference 'ref' field */
  205. if (ref) {
  206. char *saveptr;
  207. const char *delim = "@";
  208. char *view_name = NULL;
  209. char *cmd = NULL;
  210. char *str = lub_string_dup(ref);
  211. cmd = strtok_r(str, delim, &saveptr);
  212. if (!cmd) {
  213. printf("EMPTY REFERENCE COMMAND: %s\n", name);
  214. lub_string_free(str);
  215. return;
  216. }
  217. alias_name = lub_string_dup(cmd);
  218. view_name = strtok_r(NULL, delim, &saveptr);
  219. if (!view_name)
  220. alias_view = v;
  221. else
  222. alias_view = clish_shell_find_create_view(shell,
  223. view_name, NULL);
  224. lub_string_free(str);
  225. }
  226. /* create a command */
  227. cmd = clish_view_new_command(v, name, help);
  228. assert(cmd);
  229. clish_command__set_pview(cmd, v);
  230. if (NULL != escape_chars) {
  231. /* define some specialist escape characters */
  232. clish_command__set_escape_chars(cmd,
  233. escape_chars);
  234. }
  235. if (NULL != args_name) {
  236. /* define a "rest of line" argument */
  237. clish_param_t *param;
  238. clish_ptype_t *tmp = NULL;
  239. assert(NULL != args_help);
  240. tmp = clish_shell_find_create_ptype(shell,
  241. "internal_ARGS",
  242. "Arguments", "[^\\]+",
  243. CLISH_PTYPE_REGEXP,
  244. CLISH_PTYPE_NONE);
  245. assert(tmp);
  246. param =
  247. clish_param_new(args_name, args_help, tmp);
  248. clish_command__set_args(cmd, param);
  249. }
  250. // define the view which this command changes to
  251. if (NULL != view) {
  252. clish_view_t *next =
  253. clish_shell_find_create_view(shell, view,
  254. NULL);
  255. // reference the next view
  256. clish_command__set_view(cmd, next);
  257. }
  258. // define the view id which this command changes to
  259. if (NULL != viewid) {
  260. clish_command__set_viewid(cmd, viewid);
  261. }
  262. /* lock field */
  263. if (lock && (lub_string_nocasecmp(lock, "false") == 0))
  264. clish_command__set_lock(cmd, BOOL_FALSE);
  265. else
  266. clish_command__set_lock(cmd, BOOL_TRUE);
  267. /* Set alias */
  268. if (alias_name) {
  269. clish_command__set_alias(cmd, alias_name);
  270. assert(alias_view);
  271. clish_command__set_alias_view(cmd, alias_view);
  272. lub_string_free(alias_name);
  273. }
  274. process_children(shell, element, cmd);
  275. }
  276. ///////////////////////////////////////
  277. static void
  278. process_startup(clish_shell_t * shell, TiXmlElement * element, void *parent)
  279. {
  280. clish_view_t *v = (clish_view_t *) parent;
  281. clish_command_t *cmd = NULL;
  282. const char *view = element->Attribute("view");
  283. const char *viewid = element->Attribute("viewid");
  284. const char *default_shebang = element->Attribute("default_shebang");
  285. assert(NULL == shell->startup);
  286. assert(view);
  287. /* create a command with NULL help */
  288. cmd = clish_view_new_command(v, "startup", NULL);
  289. clish_command__set_lock(cmd, BOOL_FALSE);
  290. // define the view which this command changes to
  291. clish_view_t *next = clish_shell_find_create_view(shell, view, NULL);
  292. // reference the next view
  293. clish_command__set_view(cmd, next);
  294. // define the view id which this command changes to
  295. if (NULL != viewid) {
  296. clish_command__set_viewid(cmd, viewid);
  297. }
  298. if (NULL != default_shebang)
  299. clish_shell__set_default_shebang(shell, default_shebang);
  300. // remember this command
  301. shell->startup = cmd;
  302. process_children(shell, element, cmd);
  303. }
  304. ///////////////////////////////////////
  305. static void
  306. process_param(clish_shell_t * shell, TiXmlElement * element, void *parent)
  307. {
  308. clish_command_t *cmd = NULL;
  309. clish_param_t *p_param = NULL;
  310. if (0 == lub_string_nocasecmp(element->Parent()->Value(), "PARAM"))
  311. p_param = (clish_param_t *) parent;
  312. else
  313. cmd = (clish_command_t *) parent;
  314. if ((NULL != cmd) || (NULL != p_param)) {
  315. assert((!cmd) || (cmd != shell->startup));
  316. const char *name = element->Attribute("name");
  317. const char *help = element->Attribute("help");
  318. const char *ptype = element->Attribute("ptype");
  319. const char *prefix = element->Attribute("prefix");
  320. const char *defval = element->Attribute("default");
  321. const char *mode = element->Attribute("mode");
  322. const char *optional = element->Attribute("optional");
  323. const char *value = element->Attribute("value");
  324. const char *hidden = element->Attribute("hidden");
  325. const char *test = element->Attribute("test");
  326. clish_param_t *param;
  327. clish_ptype_t *tmp = NULL;
  328. // create a command
  329. assert(name);
  330. assert(help);
  331. assert(ptype);
  332. if (ptype && *ptype) {
  333. tmp = clish_shell_find_create_ptype(shell, ptype,
  334. NULL, NULL,
  335. CLISH_PTYPE_REGEXP,
  336. CLISH_PTYPE_NONE);
  337. assert(tmp);
  338. }
  339. param = clish_param_new(name, help, tmp);
  340. /* If prefix is set clish will emulate old optional
  341. * command syntax over newer optional command mechanism.
  342. * It will create nested PARAM.
  343. */
  344. if (NULL != prefix) {
  345. const char *ptype_name = "__SUBCOMMAND";
  346. clish_param_t *opt_param = NULL;
  347. /* Create a ptype for prefix-named subcommand that
  348. * will contain the nested optional parameter. The
  349. * name of ptype is hardcoded. It's not good but
  350. * it's only the service ptype.
  351. */
  352. tmp = (clish_ptype_t *)lub_bintree_find(
  353. &shell->ptype_tree, ptype_name);
  354. if (!tmp)
  355. tmp = clish_shell_find_create_ptype(shell,
  356. ptype_name, "Option", "[^\\]+",
  357. CLISH_PTYPE_REGEXP, CLISH_PTYPE_NONE);
  358. assert(tmp);
  359. opt_param = clish_param_new(prefix, help, tmp);
  360. clish_param__set_mode(opt_param,
  361. CLISH_PARAM_SUBCOMMAND);
  362. clish_param__set_optional(opt_param, BOOL_TRUE);
  363. if (NULL != test)
  364. clish_param__set_test(opt_param, test);
  365. if (cmd)
  366. // add the parameter to the command
  367. clish_command_insert_param(cmd, opt_param);
  368. if (p_param)
  369. // add the parameter to the param
  370. clish_param_insert_param(p_param, opt_param);
  371. /* Unset cmd and set parent param to opt_param */
  372. cmd = NULL;
  373. p_param = opt_param;
  374. }
  375. if (NULL != defval) {
  376. clish_param__set_default(param, defval);
  377. }
  378. if (hidden && (lub_string_nocasecmp(hidden, "true") == 0))
  379. clish_param__set_hidden(param, BOOL_TRUE);
  380. else
  381. clish_param__set_hidden(param, BOOL_FALSE);
  382. if (NULL != mode) {
  383. if (!lub_string_nocasecmp(mode, "switch")) {
  384. clish_param__set_mode(param,
  385. CLISH_PARAM_SWITCH);
  386. /* Force hidden attribute */
  387. clish_param__set_hidden(param, BOOL_TRUE);
  388. } else if (!lub_string_nocasecmp(mode, "subcommand"))
  389. clish_param__set_mode(param,
  390. CLISH_PARAM_SUBCOMMAND);
  391. else
  392. clish_param__set_mode(param,
  393. CLISH_PARAM_COMMON);
  394. }
  395. if (optional && (lub_string_nocasecmp(optional, "true") == 0))
  396. clish_param__set_optional(param, BOOL_TRUE);
  397. else
  398. clish_param__set_optional(param, BOOL_FALSE);
  399. if (NULL != value) {
  400. clish_param__set_value(param, value);
  401. /* Force mode to subcommand */
  402. clish_param__set_mode(param,
  403. CLISH_PARAM_SUBCOMMAND);
  404. }
  405. if ((NULL != test) && (NULL == prefix))
  406. clish_param__set_test(param, test);
  407. if (cmd)
  408. // add the parameter to the command
  409. clish_command_insert_param(cmd, param);
  410. if (p_param)
  411. // add the parameter to the param
  412. clish_param_insert_param(p_param, param);
  413. process_children(shell, element, param);
  414. }
  415. }
  416. ////////////////////////////////////////
  417. static void
  418. process_action(clish_shell_t * shell, TiXmlElement * element, void *parent)
  419. {
  420. clish_command_t *cmd = (clish_command_t *) parent;
  421. if (NULL != cmd) {
  422. // read the following text element
  423. TiXmlNode *text = element->FirstChild();
  424. const char *builtin = element->Attribute("builtin");
  425. const char *shebang = element->Attribute("shebang");
  426. if (NULL != text) {
  427. assert(TiXmlNode::TEXT == text->Type());
  428. // store the action
  429. clish_command__set_action(cmd, text->Value());
  430. }
  431. if (NULL != builtin) {
  432. // store the action
  433. clish_command__set_builtin(cmd, builtin);
  434. }
  435. if (NULL != shebang)
  436. clish_command__set_shebang(cmd, shebang);
  437. }
  438. }
  439. ////////////////////////////////////////
  440. static void
  441. process_detail(clish_shell_t * shell, TiXmlElement * element, void *parent)
  442. {
  443. clish_command_t *cmd = (clish_command_t *) parent;
  444. // read the following text element
  445. TiXmlNode *text = element->FirstChild();
  446. if ((NULL != cmd) && (NULL != text)) {
  447. assert(TiXmlNode::TEXT == text->Type());
  448. // store the action
  449. clish_command__set_detail(cmd, text->Value());
  450. }
  451. }
  452. ///////////////////////////////////////
  453. static void
  454. process_namespace(clish_shell_t * shell, TiXmlElement * element, void *parent)
  455. {
  456. clish_view_t *v = (clish_view_t *) parent;
  457. clish_nspace_t *nspace = NULL;
  458. const char *view = element->Attribute("ref");
  459. const char *prefix = element->Attribute("prefix");
  460. const char *prefix_help = element->Attribute("prefix_help");
  461. const char *help = element->Attribute("help");
  462. const char *completion = element->Attribute("completion");
  463. const char *context_help = element->Attribute("context_help");
  464. const char *inherit = element->Attribute("inherit");
  465. assert(view);
  466. clish_view_t *ref_view =
  467. clish_shell_find_create_view(shell, view, NULL);
  468. assert(ref_view);
  469. nspace = clish_nspace_new(ref_view);
  470. assert(nspace);
  471. clish_view_insert_nspace(v, nspace);
  472. if (NULL != prefix) {
  473. clish_nspace__set_prefix(nspace, prefix);
  474. if (prefix_help)
  475. clish_nspace_create_prefix_cmd(nspace,
  476. "prefix",
  477. prefix_help);
  478. else
  479. clish_nspace_create_prefix_cmd(nspace,
  480. "prefix",
  481. "Prefix for the imported commands.");
  482. }
  483. if (help && (lub_string_nocasecmp(help, "true") == 0))
  484. clish_nspace__set_help(nspace, BOOL_TRUE);
  485. else
  486. clish_nspace__set_help(nspace, BOOL_FALSE);
  487. if (completion && (lub_string_nocasecmp(completion, "false") == 0))
  488. clish_nspace__set_completion(nspace, BOOL_FALSE);
  489. else
  490. clish_nspace__set_completion(nspace, BOOL_TRUE);
  491. if (context_help && (lub_string_nocasecmp(context_help, "true") == 0))
  492. clish_nspace__set_context_help(nspace, BOOL_TRUE);
  493. else
  494. clish_nspace__set_context_help(nspace, BOOL_FALSE);
  495. if (inherit && (lub_string_nocasecmp(inherit, "false") == 0))
  496. clish_nspace__set_inherit(nspace, BOOL_FALSE);
  497. else
  498. clish_nspace__set_inherit(nspace, BOOL_TRUE);
  499. }
  500. ////////////////////////////////////////
  501. static void
  502. process_config(clish_shell_t * shell, TiXmlElement * element, void *parent)
  503. {
  504. clish_command_t *cmd = (clish_command_t *) parent;
  505. if (NULL == cmd)
  506. return;
  507. // read the following text element
  508. const char *operation = element->Attribute("operation");
  509. const char *priority = element->Attribute("priority");
  510. const char *pattern = element->Attribute("pattern");
  511. const char *file = element->Attribute("file");
  512. const char *splitter = element->Attribute("splitter");
  513. const char *seq = element->Attribute("sequence");
  514. const char *unique = element->Attribute("unique");
  515. const char *cfg_depth = element->Attribute("depth");
  516. if (operation && !lub_string_nocasecmp(operation, "unset"))
  517. clish_command__set_cfg_op(cmd, CLISH_CONFIG_UNSET);
  518. else if (operation && !lub_string_nocasecmp(operation, "none"))
  519. clish_command__set_cfg_op(cmd, CLISH_CONFIG_NONE);
  520. else if (operation && !lub_string_nocasecmp(operation, "dump"))
  521. clish_command__set_cfg_op(cmd, CLISH_CONFIG_DUMP);
  522. else {
  523. clish_command__set_cfg_op(cmd, CLISH_CONFIG_SET);
  524. /* The priority if no clearly specified */
  525. clish_command__set_priority(cmd, 0x7f00);
  526. }
  527. if ((priority != NULL) && (*priority != '\0')) {
  528. long val = 0;
  529. char *endptr;
  530. unsigned short pri;
  531. val = strtol(priority, &endptr, 0);
  532. if (endptr == priority)
  533. pri = 0;
  534. else if (val > 0xffff)
  535. pri = 0xffff;
  536. else if (val < 0)
  537. pri = 0;
  538. else
  539. pri = (unsigned short)val;
  540. clish_command__set_priority(cmd, pri);
  541. }
  542. if (pattern != NULL)
  543. clish_command__set_pattern(cmd, pattern);
  544. else
  545. clish_command__set_pattern(cmd, "^${__cmd}");
  546. if (file != NULL)
  547. clish_command__set_file(cmd, file);
  548. if (splitter && (lub_string_nocasecmp(splitter, "false") == 0))
  549. clish_command__set_splitter(cmd, BOOL_FALSE);
  550. else
  551. clish_command__set_splitter(cmd, BOOL_TRUE);
  552. if (unique && (lub_string_nocasecmp(unique, "false") == 0))
  553. clish_command__set_unique(cmd, BOOL_FALSE);
  554. else
  555. clish_command__set_unique(cmd, BOOL_TRUE);
  556. if (seq != NULL)
  557. clish_command__set_seq(cmd, seq);
  558. else
  559. /* The entries without sequence cannot be non-unique */
  560. clish_command__set_unique(cmd, BOOL_TRUE);
  561. if (cfg_depth != NULL)
  562. clish_command__set_cfg_depth(cmd, cfg_depth);
  563. }
  564. ///////////////////////////////////////
  565. int clish_shell_xml_read(clish_shell_t * shell, const char *filename)
  566. {
  567. int ret = -1;
  568. TiXmlDocument doc;
  569. // keep the white space
  570. TiXmlBase::SetCondenseWhiteSpace(false);
  571. if (doc.LoadFile(filename)) {
  572. TiXmlNode *child = 0;
  573. while ((child = doc.IterateChildren(child))) {
  574. process_node(shell, child, NULL);
  575. }
  576. ret = 0;
  577. } else {
  578. printf("Unable to open %s\n", filename);
  579. }
  580. return ret;
  581. }
  582. ///////////////////////////////////////