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tree.c 9.9 KB

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  1. /*
  2. * tree.c
  3. *
  4. * This file provides the implementation of a konf_tree class
  5. */
  6. #include "private.h"
  7. #include "lub/argv.h"
  8. #include "lub/string.h"
  9. #include "lub/ctype.h"
  10. #include <assert.h>
  11. #include <stdlib.h>
  12. #include <string.h>
  13. #include <stdio.h>
  14. #include <sys/types.h>
  15. #include <regex.h>
  16. /*---------------------------------------------------------
  17. * PRIVATE META FUNCTIONS
  18. *--------------------------------------------------------- */
  19. static int konf_tree_compare(const void *first, const void *second)
  20. {
  21. const konf_tree_t *f = (const konf_tree_t *)first;
  22. const konf_tree_t *s = (const konf_tree_t *)second;
  23. /* Priority check */
  24. if (f->priority != s->priority)
  25. return (f->priority - s->priority);
  26. /* Sequence check */
  27. if (f->seq_num != s->seq_num)
  28. return (f->seq_num - s->seq_num);
  29. /* Sub-sequence check */
  30. if (f->sub_num != s->sub_num)
  31. return (f->sub_num - s->sub_num);
  32. /* Line check */
  33. return strcmp(f->lower_line, s->lower_line);
  34. }
  35. /*---------------------------------------------------------
  36. * PRIVATE METHODS
  37. *--------------------------------------------------------- */
  38. static void konf_tree_init(konf_tree_t * this, const char *line,
  39. unsigned short priority)
  40. {
  41. /* set up defaults */
  42. this->line = strdup(line);
  43. this->lower_line = lub_string_tolower(line);
  44. this->priority = priority;
  45. this->seq_num = 0;
  46. this->sub_num = KONF_ENTRY_OK;
  47. this->splitter = BOOL_TRUE;
  48. this->depth = -1;
  49. /* initialise the list of commands for this conf */
  50. this->list = lub_list_new(konf_tree_compare);
  51. }
  52. /*--------------------------------------------------------- */
  53. static void konf_tree_fini(konf_tree_t * this)
  54. {
  55. lub_list_node_t *iter;
  56. /* delete each conf held by this conf */
  57. while ((iter = lub_list__get_head(this->list))) {
  58. /* remove the conf from the tree */
  59. lub_list_del(this->list, iter);
  60. /* release the instance */
  61. konf_tree_delete((konf_tree_t *)lub_list_node__get_data(iter));
  62. lub_list_node_free(iter);
  63. }
  64. lub_list_free(this->list);
  65. /* free our memory */
  66. free(this->line);
  67. this->line = NULL;
  68. free(this->lower_line);
  69. this->lower_line = NULL;
  70. }
  71. /*---------------------------------------------------------
  72. * PUBLIC META FUNCTIONS
  73. *--------------------------------------------------------- */
  74. /*--------------------------------------------------------- */
  75. konf_tree_t *konf_tree_new(const char *line, unsigned short priority)
  76. {
  77. konf_tree_t *this = malloc(sizeof(konf_tree_t));
  78. if (this)
  79. konf_tree_init(this, line, priority);
  80. return this;
  81. }
  82. /*---------------------------------------------------------
  83. * PUBLIC METHODS
  84. *--------------------------------------------------------- */
  85. void konf_tree_delete(konf_tree_t * this)
  86. {
  87. konf_tree_fini(this);
  88. free(this);
  89. }
  90. /*--------------------------------------------------------- */
  91. void konf_tree_fprintf(konf_tree_t *this, FILE *stream,
  92. const char *pattern, int top_depth, int depth,
  93. bool_t seq, unsigned char prev_pri_hi)
  94. {
  95. konf_tree_t *conf;
  96. lub_list_node_t *iter;
  97. unsigned char pri = 0;
  98. regex_t regexp;
  99. if (this->line && (*(this->line) != '\0') &&
  100. (this->depth > top_depth) &&
  101. ((depth < 0 ) || (this->depth <= (top_depth + depth)))) {
  102. char *space = NULL;
  103. unsigned space_num = this->depth - top_depth - 1;
  104. if (space_num > 0) {
  105. space = malloc(space_num + 1);
  106. memset(space, ' ', space_num);
  107. space[space_num] = '\0';
  108. }
  109. if ((0 == this->depth) &&
  110. (this->splitter ||
  111. (konf_tree__get_priority_hi(this) != prev_pri_hi)))
  112. fprintf(stream, "!\n");
  113. fprintf(stream, "%s", space ? space : "");
  114. if (seq && (konf_tree__get_seq_num(this) != 0))
  115. fprintf(stream, "%u ", konf_tree__get_seq_num(this));
  116. fprintf(stream, "%s\n", this->line);
  117. free(space);
  118. }
  119. /* regexp compilation */
  120. if (pattern)
  121. if (regcomp(&regexp, pattern, REG_EXTENDED | REG_ICASE) != 0)
  122. return;
  123. /* iterate child elements */
  124. for(iter = lub_list__get_head(this->list);
  125. iter; iter = lub_list_node__get_next(iter)) {
  126. conf = (konf_tree_t *)lub_list_node__get_data(iter);
  127. if (pattern && (0 != regexec(&regexp, conf->line, 0, NULL, 0)))
  128. continue;
  129. konf_tree_fprintf(conf, stream, NULL, top_depth, depth, seq, pri);
  130. pri = konf_tree__get_priority_hi(conf);
  131. }
  132. if (pattern)
  133. regfree(&regexp);
  134. }
  135. /*-------------------------------------------------------- */
  136. static int normalize_seq(konf_tree_t * this, unsigned short priority,
  137. lub_list_node_t *start)
  138. {
  139. unsigned short cnt = 1;
  140. konf_tree_t *conf = NULL;
  141. lub_list_node_t *iter;
  142. unsigned short cur_pri;
  143. if (start) {
  144. lub_list_node_t *prev;
  145. iter = start;
  146. if ((prev = lub_list_node__get_prev(iter))) {
  147. conf = (konf_tree_t *)lub_list_node__get_data(prev);
  148. cnt = konf_tree__get_seq_num(conf) + 1;
  149. }
  150. } else {
  151. iter = lub_list__get_head(this->list);
  152. }
  153. /* If list is empty */
  154. if (!iter)
  155. return 0;
  156. /* Iterate and renum */
  157. do {
  158. conf = (konf_tree_t *)lub_list_node__get_data(iter);
  159. cur_pri = konf_tree__get_priority(conf);
  160. if (cur_pri > priority)
  161. break;
  162. if (cur_pri < priority)
  163. continue;
  164. if (konf_tree__get_seq_num(conf) == 0)
  165. continue;
  166. konf_tree__set_seq_num(conf, cnt++);
  167. } while ((iter = lub_list_node__get_next(iter)));
  168. return 0;
  169. }
  170. /*--------------------------------------------------------- */
  171. konf_tree_t *konf_tree_new_conf(konf_tree_t * this,
  172. const char *line, unsigned short priority,
  173. bool_t seq, unsigned short seq_num)
  174. {
  175. lub_list_node_t *node;
  176. /* Allocate the memory for a new child element */
  177. konf_tree_t *newconf = konf_tree_new(line, priority);
  178. assert(newconf);
  179. /* Sequence */
  180. if (seq) {
  181. konf_tree__set_seq_num(newconf,
  182. seq_num ? seq_num : 0xffff);
  183. konf_tree__set_sub_num(newconf, KONF_ENTRY_NEW);
  184. }
  185. /* Insert it into the list */
  186. node = lub_list_add(this->list, newconf);
  187. if (seq) {
  188. normalize_seq(this, priority, node);
  189. konf_tree__set_sub_num(newconf, KONF_ENTRY_OK);
  190. }
  191. return newconf;
  192. }
  193. /*--------------------------------------------------------- */
  194. konf_tree_t *konf_tree_find_conf(konf_tree_t * this,
  195. const char *line, unsigned short priority, unsigned short seq_num)
  196. {
  197. konf_tree_t *conf;
  198. lub_list_node_t *iter;
  199. int check_pri = 0;
  200. char *lower_line;
  201. /* If list is empty */
  202. if (!(iter = lub_list__get_tail(this->list)))
  203. return NULL;
  204. if ((0 != priority) && (0 != seq_num))
  205. check_pri = 1;
  206. /* Iterate non-empty tree */
  207. lower_line = lub_string_tolower(line);
  208. do {
  209. conf = (konf_tree_t *)lub_list_node__get_data(iter);
  210. if (check_pri) {
  211. if (priority < conf->priority)
  212. continue;
  213. if (priority > conf->priority)
  214. break;
  215. if (seq_num < conf->seq_num)
  216. continue;
  217. if (seq_num > conf->seq_num)
  218. break;
  219. }
  220. if (!strcmp(conf->lower_line, lower_line)) {
  221. free(lower_line);
  222. return conf;
  223. }
  224. } while ((iter = lub_list_node__get_prev(iter)));
  225. free(lower_line);
  226. return NULL;
  227. }
  228. /*--------------------------------------------------------- */
  229. int konf_tree_del_pattern(konf_tree_t *this,
  230. const char *line, bool_t unique,
  231. const char *pattern, unsigned short priority,
  232. bool_t seq, unsigned short seq_num)
  233. {
  234. int res = 0;
  235. konf_tree_t *conf;
  236. lub_list_node_t *iter;
  237. lub_list_node_t *tmp;
  238. regex_t regexp;
  239. int del_cnt = 0; /* how many strings were deleted */
  240. if (seq && (0 == priority))
  241. return -1;
  242. /* Is tree empty? */
  243. if (!(iter = lub_list__get_head(this->list)))
  244. return 0;
  245. /* Compile regular expression */
  246. if (regcomp(&regexp, pattern, REG_EXTENDED | REG_ICASE) != 0)
  247. return -1;
  248. /* Iterate configuration tree */
  249. tmp = lub_list_node_new(NULL);
  250. do {
  251. conf = (konf_tree_t *)lub_list_node__get_data(iter);
  252. if ((0 != priority) &&
  253. (priority != conf->priority))
  254. continue;
  255. if (seq && (seq_num != 0) &&
  256. (seq_num != conf->seq_num))
  257. continue;
  258. if (seq && (0 == seq_num) && (0 == conf->seq_num))
  259. continue;
  260. if (0 != regexec(&regexp, conf->line, 0, NULL, 0))
  261. continue;
  262. if (unique && line && !strcmp(conf->lower_line, line)) {
  263. res++;
  264. continue;
  265. }
  266. lub_list_del(this->list, iter);
  267. konf_tree_delete(conf);
  268. lub_list_node_copy(tmp, iter);
  269. lub_list_node_free(iter);
  270. iter = tmp;
  271. del_cnt++;
  272. } while ((iter = lub_list_node__get_next(iter)));
  273. lub_list_node_free(tmp);
  274. regfree(&regexp);
  275. if (seq && (del_cnt != 0))
  276. normalize_seq(this, priority, NULL);
  277. return res;
  278. }
  279. /*--------------------------------------------------------- */
  280. unsigned short konf_tree__get_priority(const konf_tree_t * this)
  281. {
  282. return this->priority;
  283. }
  284. /*--------------------------------------------------------- */
  285. unsigned char konf_tree__get_priority_hi(const konf_tree_t * this)
  286. {
  287. return (unsigned char)(this->priority >> 8);
  288. }
  289. /*--------------------------------------------------------- */
  290. unsigned char konf_tree__get_priority_lo(const konf_tree_t * this)
  291. {
  292. return (unsigned char)(this->priority & 0xff);
  293. }
  294. /*--------------------------------------------------------- */
  295. bool_t konf_tree__get_splitter(const konf_tree_t * this)
  296. {
  297. return this->splitter;
  298. }
  299. /*--------------------------------------------------------- */
  300. void konf_tree__set_splitter(konf_tree_t *this, bool_t splitter)
  301. {
  302. this->splitter = splitter;
  303. }
  304. /*--------------------------------------------------------- */
  305. unsigned short konf_tree__get_seq_num(const konf_tree_t * this)
  306. {
  307. return this->seq_num;
  308. }
  309. /*--------------------------------------------------------- */
  310. void konf_tree__set_seq_num(konf_tree_t * this, unsigned short seq_num)
  311. {
  312. this->seq_num = seq_num;
  313. }
  314. /*--------------------------------------------------------- */
  315. unsigned short konf_tree__get_sub_num(const konf_tree_t * this)
  316. {
  317. return this->sub_num;
  318. }
  319. /*--------------------------------------------------------- */
  320. void konf_tree__set_sub_num(konf_tree_t * this, unsigned short sub_num)
  321. {
  322. this->sub_num = sub_num;
  323. }
  324. /*--------------------------------------------------------- */
  325. const char * konf_tree__get_line(const konf_tree_t * this)
  326. {
  327. return this->line;
  328. }
  329. /*--------------------------------------------------------- */
  330. void konf_tree__set_depth(konf_tree_t * this, int depth)
  331. {
  332. this->depth = depth;
  333. }
  334. /*--------------------------------------------------------- */
  335. int konf_tree__get_depth(const konf_tree_t * this)
  336. {
  337. return this->depth;
  338. }