Annotation of mqtt/src/pubmqtt.c, revision 1.2.2.9
1.2 misho 1: #include "global.h"
2:
3:
4: extern const char sql_schema[];
5:
6:
7: /*
8: * mqtt_db_log() Log database connection message
9: *
10: * @fmt = format string
11: * @... = argument list
12: * return: none
13: */
14: static void
15: mqtt_rtlm_log(const char *fmt, ...)
16: {
17: va_list lst;
18:
19: va_start(lst, fmt);
20: vsyslog(LOG_ERR, fmt, lst);
21: va_end(lst);
22: }
1.2.2.5 misho 23: #define MQTT_RTLM_LOG(_sql) (assert((_sql)), mqtt_rtlm_log("Error:: %s(%d) SQL #%d - %s", \
24: __func__, __LINE__, \
1.2 misho 25: sqlite3_errcode((_sql)), sqlite3_errmsg((_sql))))
26:
27:
28: /*
29: * mqtt_rtlm_open() Open database connection
30: *
31: * @cfg = config filename
32: * return: NULL error or SQL handle
33: */
34: sqlite3 *
1.2.2.3 misho 35: mqtt_rtlm_open(cfg_root_t *cfg)
1.2 misho 36: {
37: sqlite3 *sql = NULL;
38: const char *str = NULL;
39:
40: if (!cfg)
41: return NULL;
42:
1.2.2.3 misho 43: str = cfg_getAttribute(cfg, "mqtt_pub", "name");
1.2 misho 44: if (!str) {
45: mqtt_rtlm_log("Error:: Unknown database name ...\n");
46: return NULL;
47: }
48:
49: if (sqlite3_open_v2(str, &sql, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL)) {
50: MQTT_RTLM_LOG(sql);
51: sqlite3_close(sql);
52: return NULL;
53: }
54:
55: if (sqlite3_exec(sql, sql_schema, NULL, NULL, NULL)) {
56: MQTT_RTLM_LOG(sql);
57: sqlite3_close(sql);
58: return NULL;
59: }
60: return sql;
61: }
62:
63: /*
64: * mqtt_rtlm_close() Close database connection
65: *
66: * @sql = SQL handle
67: * return: none
68: */
69: void
70: mqtt_rtlm_close(sqlite3 *sql)
71: {
72: sqlite3_close(sql);
73: }
74:
75: /*
76: * mqtt_rtlm_init_session() Create session
77: *
78: * @cfg = loaded config
79: * @sql = SQL handle
80: * @connid = connection id
81: * @user = username
82: * @host = hostname
83: * @will = will flag if !=0 must fill arguments
84: * @... = will arguments in order topic,msg,qos,retain
85: * return: -1 error, 0 session already appears or >0 row changed
86: */
87: int
1.2.2.3 misho 88: mqtt_rtlm_init_session(cfg_root_t *cfg, sqlite3 *sql, const char *connid, const char *user,
1.2 misho 89: const char *host, char will, ...)
90: {
91: va_list lst;
92: int ret = 0;
93: char *str, szStmt[BUFSIZ] = { 0 };
94: sqlite3_stmt *stmt;
95:
96: if (!cfg || !sql)
97: return -1;
98:
1.2.2.3 misho 99: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_online");
1.2 misho 100: if (!str) {
101: mqtt_rtlm_log("Error:: not found online table name");
102: return -1;
103: }
104: if (!will)
105: snprintf(szStmt, sizeof szStmt, "INSERT INTO %s (ConnID, Username, RemoteHost, "
106: "WillFlag) VALUES ('%s', '%s', '%s', 0);", str, connid, user, host);
107: else {
108: va_start(lst, will);
109: snprintf(szStmt, sizeof szStmt, "INSERT INTO %s (ConnID, Username, RemoteHost, "
110: "WillFlag, WillRetain, WillQoS, WillMsg, WillTopic) "
111: "VALUES ('%s', '%s', '%s', %d, %d, %d, '%s', '%s');",
112: str, connid, user, host, will,
113: va_arg(lst, int), va_arg(lst, int), va_arg(lst, char*), va_arg(lst, char*));
114: va_end(lst);
115: }
116:
117: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
118: MQTT_RTLM_LOG(sql);
119: return -1;
120: }
121: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
122: ret = sqlite3_changes(sql);
123: else {
124: if (ret > SQLITE_OK && ret < SQLITE_ROW)
125: MQTT_RTLM_LOG(sql);
126: ret = 0;
127: }
128: sqlite3_finalize(stmt);
129:
130: return ret;
131: }
132:
133: /*
134: * mqtt_rtlm_fini_session() Delete session(s)
135: *
136: * @cfg = loaded config
137: * @sql = SQL handle
138: * @connid = connection id
139: * @user = username
140: * @host = hostname
141: * return: -1 error, 0 session already appears or >0 row changed
142: */
143: int
1.2.2.3 misho 144: mqtt_rtlm_fini_session(cfg_root_t *cfg, sqlite3 *sql, const char *connid, const char *user, const char *host)
1.2 misho 145: {
146: int ret = 0;
147: char *str, szStmt[BUFSIZ] = { 0 };
148: sqlite3_stmt *stmt;
149:
150: if (!cfg || !sql)
151: return -1;
152:
1.2.2.3 misho 153: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_online");
1.2 misho 154: if (!str) {
155: mqtt_rtlm_log("Error:: not found online table name");
156: return -1;
157: }
158: snprintf(szStmt, sizeof szStmt, "DELETE FROM %s WHERE ConnID = '%s' AND Username = '%s' "
159: "AND RemoteHost LIKE '%s';", str, connid, user, host);
160:
161: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
162: MQTT_RTLM_LOG(sql);
163: return -1;
164: }
165: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
166: ret = sqlite3_changes(sql);
167: else {
168: if (ret > SQLITE_OK && ret < SQLITE_ROW)
169: MQTT_RTLM_LOG(sql);
170: ret = 0;
171: }
172: sqlite3_finalize(stmt);
173:
174: return ret;
175: }
176:
177: /*
178: * mqtt_rtlm_chk_session() Check session(s)
179: *
180: * @cfg = loaded config
181: * @sql = SQL handle
182: * @connid = connection id
183: * @user = username
184: * @host = hostname
185: * return: -1 error, 0 not logged or >0 logged found rows
186: */
187: int
1.2.2.3 misho 188: mqtt_rtlm_chk_session(cfg_root_t *cfg, sqlite3 *sql, const char *connid, const char *user, const char *host)
1.2 misho 189: {
190: int ret = 0;
191: char *str, szStmt[BUFSIZ] = { 0 };
192: sqlite3_stmt *stmt;
193:
194: if (!cfg || !sql)
195: return -1;
196:
1.2.2.3 misho 197: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_online");
1.2 misho 198: if (!str) {
199: mqtt_rtlm_log("Error:: not found online table name");
200: return -1;
201: }
202: snprintf(szStmt, sizeof szStmt, "SELECT ConnID, RemoteHost FROM %s WHERE "
1.2.2.8 misho 203: "ConnID = '%s' AND Username LIKE '%s' AND RemoteHost LIKE '%s';",
1.2 misho 204: str, connid, user, host);
205:
206: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
207: MQTT_RTLM_LOG(sql);
208: return -1;
209: }
210: if (sqlite3_step(stmt) == SQLITE_ROW)
211: ret = sqlite3_changes(sql);
212: else
213: ret = 0;
214: sqlite3_finalize(stmt);
215:
216: return ret;
217: }
218:
219: /*
220: * mqtt_rtlm_write_topic() Publish topic
221: *
222: * @cfg = loaded config
223: * @sql = SQL handle
1.2.2.8 misho 224: * @connid = connection id
1.2 misho 225: * @msgid = MessageID
226: * @topic = topic
227: * @txt = text
228: * @user = username
229: * @host = hostname
230: * @retain = !=0 retain message to database
231: * return: -1 error, 0 no publish or >0 published ok
232: */
233: int
1.2.2.8 misho 234: mqtt_rtlm_write_topic(cfg_root_t *cfg, sqlite3 *sql, const char *connid, u_short msgid,
235: const char *topic, const char *txt, const char *user, const char *host, char retain)
1.2 misho 236: {
237: int ret = 0;
238: char *str, szStmt[BUFSIZ] = { 0 };
239: sqlite3_stmt *stmt;
240:
241: if (!cfg || !sql || !topic)
242: return -1;
243:
1.2.2.3 misho 244: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_topics");
1.2 misho 245: if (!str) {
246: mqtt_rtlm_log("Error:: not found topics table name");
247: return -1;
248: }
1.2.2.8 misho 249: snprintf(szStmt, sizeof szStmt, "INSERT INTO %s (Retain, ConnID, MsgID, Topic, Value, PubUser, "
250: "PubDate, PubHost) VALUES (%d, '%s', %d, '%s', '%s', '%s', "
1.2 misho 251: "datetime('now', 'localtime'), '%s');",
1.2.2.8 misho 252: str, retain, connid, msgid, topic, txt, user, host);
253:
254: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
255: MQTT_RTLM_LOG(sql);
256: return -1;
257: }
258: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
259: ret = sqlite3_changes(sql);
260: else {
261: if (ret > SQLITE_OK && ret < SQLITE_ROW)
262: MQTT_RTLM_LOG(sql);
263: ret = 0;
264: }
265: sqlite3_finalize(stmt);
266:
267: return ret;
268: }
269:
270: /*
271: * mqtt_rtlm_wipe_topic() Wipe all topics
272: *
273: * @cfg = loaded config
274: * @sql = SQL handle
275: * @connid = connection id
276: * @user = username
277: * @retain = -1 no matter
278: * return: -1 error, 0 no changes or >0 deleted rows
279: */
280: int
281: mqtt_rtlm_wipe_topic(cfg_root_t *cfg, sqlite3 *sql, const char *connid, const char *user, char retain)
282: {
283: int ret = 0;
284: char *str, *rtn, szStmt[BUFSIZ] = { 0 };
285: sqlite3_stmt *stmt;
286:
287: if (!cfg || !sql || !connid)
288: return -1;
289:
290: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_topics");
291: if (!str) {
292: mqtt_rtlm_log("Error:: not found topics table name");
293: return -1;
294: }
295: switch (retain) {
296: case -1:
297: rtn = "";
298: break;
299: case 0:
300: rtn = "AND Retain = 0";
301: break;
302: default:
303: rtn = "AND Retain != 0";
304: break;
305: }
306: snprintf(szStmt, sizeof szStmt, "DELETE FROM %s WHERE ConnID = '%s' AND "
307: "PubUser LIKE '%s' %s;", str, connid, user, rtn);
1.2 misho 308:
309: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
310: MQTT_RTLM_LOG(sql);
311: return -1;
312: }
313: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
314: ret = sqlite3_changes(sql);
315: else {
316: if (ret > SQLITE_OK && ret < SQLITE_ROW)
317: MQTT_RTLM_LOG(sql);
318: ret = 0;
319: }
320: sqlite3_finalize(stmt);
321:
322: return ret;
323: }
324:
325: /*
326: * mqtt_rtlm_delete_topic() Delete topic
327: *
328: * @cfg = loaded config
329: * @sql = SQL handle
1.2.2.8 misho 330: * @connid = connection id
1.2 misho 331: * @msgid = MessageID
332: * @topic = topic
333: * @user = username
334: * @host = hostname
335: * @retain = -1 no matter
336: * return: -1 error, 0 no changes or >0 deleted rows
337: */
338: int
1.2.2.8 misho 339: mqtt_rtlm_delete_topic(cfg_root_t *cfg, sqlite3 *sql, const char *connid, u_short msgid,
340: const char *topic, const char *user, const char *host, char retain)
1.2 misho 341: {
342: int ret = 0;
343: char *str, *rtn, szStmt[BUFSIZ] = { 0 };
344: sqlite3_stmt *stmt;
345:
346: if (!cfg || !sql || !topic)
347: return -1;
348:
1.2.2.3 misho 349: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_topics");
1.2 misho 350: if (!str) {
351: mqtt_rtlm_log("Error:: not found topics table name");
352: return -1;
353: }
354: switch (retain) {
355: case -1:
356: rtn = "";
357: break;
358: case 0:
359: rtn = "AND Retain = 0";
360: break;
361: default:
362: rtn = "AND Retain != 0";
363: break;
364: }
1.2.2.8 misho 365: snprintf(szStmt, sizeof szStmt, "DELETE FROM %s WHERE ConnID = '%s' AND MsgID = %d AND "
366: "Topic LIKE '%s' AND PubUser LIKE '%s' AND PubHost LIKE '%s' %s;", str,
367: connid, msgid, topic, user, host, rtn);
1.2 misho 368:
369: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
370: MQTT_RTLM_LOG(sql);
371: return -1;
372: }
373: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
374: ret = sqlite3_changes(sql);
375: else {
376: if (ret > SQLITE_OK && ret < SQLITE_ROW)
377: MQTT_RTLM_LOG(sql);
378: ret = 0;
379: }
380: sqlite3_finalize(stmt);
381:
382: return ret;
383: }
384:
385: /*
386: * mqtt_rtlm_read_topic() Get topic
387: *
388: * @cfg = loaded config
389: * @sql = SQL handle
1.2.2.8 misho 390: * @connid = connection id
1.2 misho 391: * @msgid = MessageID
392: * @topic = topic
393: * @retain = retain 0 get only dynamic, >0 get only retained and -1 no matter
394: * return: NULL error or not found and !=NULL allocated subscribe topics
395: */
396: mqtt_subscr_t *
1.2.2.8 misho 397: mqtt_rtlm_read_topic(cfg_root_t *cfg, sqlite3 *sql, const char *connid, u_short msgid,
398: const char *topic, char retain)
1.2 misho 399: {
400: int rowz = 0;
401: char *str, szStr[STRSIZ], szStmt[BUFSIZ] = { 0 };
402: sqlite3_stmt *stmt;
403: register int j;
404: mqtt_subscr_t *s = NULL;
405:
406: if (!cfg || !sql || !topic)
407: return NULL;
408:
409: switch (retain) {
410: case -1:
411: memset(szStr, 0, sizeof szStr);
412: break;
413: case 0:
414: snprintf(szStr, sizeof szStr, "AND Retain = 0");
415: break;
416: default:
417: snprintf(szStr, sizeof szStr, "AND Retain > 0");
418: break;
419: }
420:
1.2.2.3 misho 421: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_topics");
1.2 misho 422: if (!str) {
423: mqtt_rtlm_log("Error:: not found topics table name");
424: return NULL;
425: }
426: snprintf(szStmt, sizeof szStmt, "SELECT Retain, Topic, Value FROM %s WHERE "
1.2.2.8 misho 427: "ConnID = '%s' AND MsgID = %d AND Topic LIKE '%s' %s;",
428: str, connid, msgid, topic, szStr);
1.2 misho 429:
430: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
431: MQTT_RTLM_LOG(sql);
432: return NULL;
433: }
434:
435: /* calculate count of rows and allocate subscribe items */
436: while (sqlite3_step(stmt) == SQLITE_ROW)
437: rowz++;
1.2.2.9 ! misho 438: if (!(s = io_malloc((rowz + 1) * sizeof(mqtt_subscr_t)))) {
1.2 misho 439: mqtt_rtlm_log("Error:: System #%d - %s", errno, strerror(errno));
440: goto end;
441: } else
442: memset(s, 0, (rowz + 1) * sizeof(mqtt_subscr_t));
443: sqlite3_reset(stmt);
444:
445: /* fill with data */
446: for (j = 0; j < rowz && sqlite3_step(stmt) == SQLITE_ROW; j++) {
447: s[j].sub_ret = (char) sqlite3_column_int(stmt, 0);
1.2.2.9 ! misho 448: s[j].sub_topic.msg_base = (u_char*) io_strdup((char*) sqlite3_column_text(stmt, 1));
1.2.2.1 misho 449: s[j].sub_topic.msg_len = strlen((char*) s[j].sub_topic.msg_base);
1.2.2.9 ! misho 450: s[j].sub_value.msg_base = (u_char*) io_strdup((char*) sqlite3_column_text(stmt, 2));
1.2.2.1 misho 451: s[j].sub_value.msg_len = strlen((char*) s[j].sub_value.msg_base);
1.2 misho 452: }
453: end:
454: sqlite3_finalize(stmt);
455:
456: return s;
457: }
1.2.2.2 misho 458:
459: /*
460: * mqtt_rtlm_write_subscribe() Subscribe topic
461: *
462: * @cfg = loaded config
463: * @sql = SQL handle
1.2.2.8 misho 464: * @connid = connection id
1.2.2.2 misho 465: * @msgid = MessageID
466: * @topic = topic
467: * @user = username
468: * @host = hostname
469: * @qos = Subscribe QoS
470: * return: -1 error, 0 no publish or >0 published ok
471: */
472: int
1.2.2.8 misho 473: mqtt_rtlm_write_subscribe(cfg_root_t *cfg, sqlite3 *sql, const char *connid, u_short msgid,
474: const char *topic, const char *user, const char *host, char qos)
1.2.2.2 misho 475: {
476: int ret = 0;
477: char *str, szStmt[BUFSIZ] = { 0 };
478: sqlite3_stmt *stmt;
479:
480: if (!cfg || !sql || !topic)
481: return -1;
482:
1.2.2.3 misho 483: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_subscribes");
1.2.2.2 misho 484: if (!str) {
485: mqtt_rtlm_log("Error:: not found subscribes table name");
486: return -1;
487: }
1.2.2.8 misho 488: snprintf(szStmt, sizeof szStmt, "INSERT INTO %s (ConnID, MsgID, QoS, Topic, PubUser, "
489: "PubDate, PubHost) VALUES ('%s', %d, %d, '%s', '%s', "
1.2.2.2 misho 490: "datetime('now', 'localtime'), '%s');", str,
1.2.2.8 misho 491: connid, msgid, qos, topic, user, host);
1.2.2.2 misho 492:
493: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
494: MQTT_RTLM_LOG(sql);
495: return -1;
496: }
497: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
498: ret = sqlite3_changes(sql);
499: else {
500: if (ret > SQLITE_OK && ret < SQLITE_ROW)
501: MQTT_RTLM_LOG(sql);
502: ret = 0;
503: }
504: sqlite3_finalize(stmt);
505:
506: return ret;
507: }
508:
509: /*
510: * mqtt_rtlm_delete_subscribe() Delete subscribe
511: *
512: * @cfg = loaded config
513: * @sql = SQL handle
1.2.2.8 misho 514: * @connid = connection id
1.2.2.2 misho 515: * @topic = topic
516: * @user = username
517: * @host = hostname
518: * return: -1 error, 0 no changes or >0 deleted rows
519: */
520: int
1.2.2.8 misho 521: mqtt_rtlm_delete_subscribe(cfg_root_t *cfg, sqlite3 *sql, const char *connid,
522: const char *topic, const char *user, const char *host)
1.2.2.2 misho 523: {
524: int ret = 0;
1.2.2.7 misho 525: char *str, szStmt[BUFSIZ] = { 0 };
1.2.2.2 misho 526: sqlite3_stmt *stmt;
527:
528: if (!cfg || !sql || !topic)
529: return -1;
530:
1.2.2.3 misho 531: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_subscribes");
1.2.2.2 misho 532: if (!str) {
533: mqtt_rtlm_log("Error:: not found subscribes table name");
534: return -1;
535: }
1.2.2.8 misho 536: snprintf(szStmt, sizeof szStmt, "DELETE FROM %s WHERE ConnID = '%s' AND "
537: "Topic LIKE '%s' AND PubUser LIKE '%s' AND PubHost LIKE '%s';", str,
538: connid, topic, user, host);
1.2.2.2 misho 539:
540: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
541: MQTT_RTLM_LOG(sql);
542: return -1;
543: }
544: if ((ret = sqlite3_step(stmt)) == SQLITE_DONE)
545: ret = sqlite3_changes(sql);
546: else {
547: if (ret > SQLITE_OK && ret < SQLITE_ROW)
548: MQTT_RTLM_LOG(sql);
549: ret = 0;
550: }
551: sqlite3_finalize(stmt);
552:
553: return ret;
554: }
555:
556: /*
557: * mqtt_rtlm_read_subscribe() Get subscribe topic
558: *
559: * @cfg = loaded config
560: * @sql = SQL handle
1.2.2.8 misho 561: * @connid = connection id
1.2.2.2 misho 562: * @topic = topic
563: * return: NULL error or not found and !=NULL allocated subscribe topics
564: */
565: mqtt_subscr_t *
1.2.2.8 misho 566: mqtt_rtlm_read_subscribe(cfg_root_t *cfg, sqlite3 *sql, const char *connid, const char *topic)
1.2.2.2 misho 567: {
568: int rowz = 0;
569: char *str, szStmt[BUFSIZ] = { 0 };
570: sqlite3_stmt *stmt;
571: register int j;
572: mqtt_subscr_t *s = NULL;
573:
574: if (!cfg || !sql || !topic)
575: return NULL;
576:
1.2.2.3 misho 577: str = (char*) cfg_getAttribute(cfg, "mqtt_pub", "tbl_subscribes");
1.2.2.2 misho 578: if (!str) {
579: mqtt_rtlm_log("Error:: not found subscribes table name");
580: return NULL;
581: }
1.2.2.8 misho 582: snprintf(szStmt, sizeof szStmt, "SELECT QoS, Topic FROM %s WHERE ConnID = '%s' AND "
583: "Topic LIKE '%s';", str, connid, topic);
1.2.2.2 misho 584:
585: if (sqlite3_prepare_v2(sql, szStmt, strlen(szStmt), &stmt, NULL)) {
586: MQTT_RTLM_LOG(sql);
587: return NULL;
588: }
589:
590: /* calculate count of rows and allocate subscribe items */
591: while (sqlite3_step(stmt) == SQLITE_ROW)
592: rowz++;
1.2.2.9 ! misho 593: if (!(s = io_malloc((rowz + 1) * sizeof(mqtt_subscr_t)))) {
1.2.2.2 misho 594: mqtt_rtlm_log("Error:: System #%d - %s", errno, strerror(errno));
595: goto end;
596: } else
597: memset(s, 0, (rowz + 1) * sizeof(mqtt_subscr_t));
598: sqlite3_reset(stmt);
599:
600: /* fill with data */
601: for (j = 0; j < rowz && sqlite3_step(stmt) == SQLITE_ROW; j++) {
602: s[j].sub_ret = (char) sqlite3_column_int(stmt, 0);
1.2.2.9 ! misho 603: s[j].sub_topic.msg_base = (u_char*) io_strdup((char*) sqlite3_column_text(stmt, 1));
1.2.2.2 misho 604: s[j].sub_topic.msg_len = strlen((char*) s[j].sub_topic.msg_base);
605: s[j].sub_value.msg_base = NULL;
606: s[j].sub_value.msg_len = 0;
607: }
608: end:
609: sqlite3_finalize(stmt);
610:
611: return s;
612: }
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