1: /*************************************************************************
2: * (C) 2008 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: queue.c,v 1.11 2012/09/19 15:22:32 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47:
48:
49: static inline struct tagCfg *
50: _selectAttribute(cfg_root_t * __restrict cfg, const char *csSec, const char *csAttr)
51: {
52: struct tagCfg fav, *c;
53:
54: if (!cfg)
55: return NULL;
56: else
57: memset(&fav, 0, sizeof fav);
58:
59: if (csSec && *csSec)
60: AIT_KEY(&fav.cfg_sec) = crcFletcher16((u_short*) csSec,
61: io_align(strlen(csSec), 2) / 2);
62: if (csAttr)
63: AIT_KEY(&fav.cfg_attr) = crcFletcher16((u_short*) csAttr,
64: io_align(strlen(csAttr), 2) / 2);
65:
66: if (!csAttr)
67: return RB_NFIND(tagRC, cfg, &fav);
68: else {
69: c = RB_FIND(tagRC, cfg, &fav);
70: if (!c)
71: return NULL; /* not found */
72: do {
73: if (!strcmp(AIT_GET_STR(&c->cfg_attr), csAttr))
74: return c; /* FOUND! */
75: } while (RB_NEXT(tagRC, cfg, c) && !cfg_tree_cmp(c, &fav));
76: return NULL; /* not found */
77: }
78: }
79:
80: /* --------------------------------------------------------------- */
81:
82: /*
83: * cfg_findAttribute() - Find attribute position in config file
84: *
85: * @cfg = Config root
86: * @csSec = Config section //[{csSec}]
87: * @csAttr = Config attribute //{csAttr} = ...
88: * return: 0 not found item, -1 error or >0 position in list
89: */
90: inline int
91: cfg_findAttribute(cfg_root_t * __restrict cfg, const char *csSec, const char *csAttr)
92: {
93: struct tagCfg *av, fav;
94: register int cx = 0;
95:
96: if (!cfg || !csAttr) {
97: cfg_SetErr(EINVAL, "Invalid argument(s)");
98: return -1;
99: } else
100: memset(&fav, 0, sizeof fav);
101:
102: if (csSec && *csSec)
103: AIT_KEY(&fav.cfg_sec) = crcFletcher16((u_short*) csSec,
104: io_align(strlen(csSec), 2) / 2);
105: if (csAttr)
106: AIT_KEY(&fav.cfg_attr) = crcFletcher16((u_short*) csAttr,
107: io_align(strlen(csAttr), 2) / 2);
108:
109: SLIST_FOREACH(av, cfg, cfg_next) {
110: ++cx;
111: if (!cfg_tree_cmp(&fav, av))
112: return cx;
113: }
114:
115: return 0;
116: }
117:
118: /*
119: * cfg_unsetAttribute() - Unset item from config and free resources
120: *
121: * @cfg = Config root
122: * @csSec = Config section //[{csSec}], if NULL unset in *default* section
123: * @csAttr = Config attribute //{csAttr} = ...
124: * return: 0 item not found, -1 error or 1 removed item
125: */
126: int
127: cfg_unsetAttribute(cfg_root_t * __restrict cfg, const char *csSec, const char *csAttr)
128: {
129: struct tagCfg *av;
130:
131: if (!cfg || !csAttr)
132: return -1;
133:
134: av = _selectAttribute(cfg, csSec, csAttr);
135: if (!av)
136: return 0;
137:
138: CFG_RC_LOCK(cfg);
139: RB_REMOVE(tagRC, cfg, av);
140: SLIST_REMOVE(cfg, av, tagCfg, cfg_next);
141: CFG_RC_UNLOCK(cfg);
142:
143: AIT_FREE_VAL(&av->cfg_val);
144: AIT_FREE_VAL(&av->cfg_attr);
145: AIT_FREE_VAL(&av->cfg_sec);
146: io_free(av);
147: return 1;
148: }
149:
150: /*
151: * cfg_setAttribute() - Set item in config or adding new item if not exists
152: *
153: * @cfg = Config root
154: * @csSec = Config section //[{csSec}], if NULL set in *default* section
155: * @csAttr = Config attribute //{csAttr} = ...
156: * @csVal = Config value //... = {csVal} to setup
157: * return: 0 nothing changed, -1 error, 1 found and updated item or 2 added new item
158: */
159: int
160: cfg_setAttribute(cfg_root_t * __restrict cfg, const char *csSec, const char *csAttr, const char *csVal)
161: {
162: struct tagCfg *av, *section;
163:
164: if (!cfg || !csAttr)
165: return -1;
166:
167: av = _selectAttribute(cfg, csSec, csAttr);
168: if (!av) {
169: /* adding new element */
170: section = _selectAttribute(cfg, csSec, NULL);
171:
172: av = io_malloc(sizeof(struct tagCfg));
173: if (!av) {
174: LOGERR;
175: return -1;
176: } else {
177: memset(av, 0, sizeof(struct tagCfg));
178:
179: CFG_RC_LOCK(cfg);
180: if (!section)
181: SLIST_INSERT_HEAD(cfg, av, cfg_next);
182: else
183: SLIST_INSERT_AFTER(section, av, cfg_next);
184: CFG_RC_UNLOCK(cfg);
185: }
186:
187: if (csSec && *csSec) {
188: AIT_SET_STR(&av->cfg_sec, csSec);
189: AIT_KEY(&av->cfg_sec) = crcFletcher16(AIT_GET_LIKE(&av->cfg_sec, u_short*),
190: io_align(AIT_LEN(&av->cfg_sec) - 1, 2) / 2);
191: }
192: AIT_SET_STR(&av->cfg_val, csVal ? csVal : "");
193: AIT_SET_STR(&av->cfg_attr, csAttr);
194: AIT_KEY(&av->cfg_attr) = crcFletcher16(AIT_GET_LIKE(&av->cfg_attr, u_short*),
195: io_align(AIT_LEN(&av->cfg_attr) - 1, 2) / 2);
196:
197: CFG_RC_LOCK(cfg);
198: RB_INSERT(tagRC, cfg, av);
199: CFG_RC_UNLOCK(cfg);
200: return 2;
201: }
202:
203: if (csVal && AIT_ADDR(&av->cfg_val) &&
204: strcmp((char*) csVal, (char*) AIT_GET_STR(&av->cfg_val))) {
205: /* Update element */
206: AIT_FREE_VAL(&av->cfg_val);
207: AIT_SET_STR(&av->cfg_val, csVal);
208: return 1;
209: }
210:
211: /* Nothing happens ... found & values is equal! */
212: return 0;
213: }
214:
215: /*
216: * cfg_getAttribute() - Get item from config and return value from it
217: *
218: * @cfg = Config root
219: * @csSec = Config section //[{csSec}], if NULL unset in *default* section
220: * @csAttr = Config attribute //{csAttr} = ..., if NULL unset as *any* attribute
221: * return: NULL item not found or null parameters, !=NULL value const string
222: */
223: inline const char *
224: cfg_getAttribute(cfg_root_t * __restrict cfg, const char *csSec, const char *csAttr)
225: {
226: struct tagCfg *av;
227:
228: if (!cfg || !csAttr)
229: return NULL;
230:
231: av = _selectAttribute(cfg, csSec, csAttr);
232: if (!av)
233: return NULL;
234:
235: return AIT_GET_STR(&av->cfg_val);
236: }
237:
238: /*
239: * cfg_loadAttribute() - Get guarded attribute, if not found item return *default value*
240: *
241: * @cfg = Config root
242: * @csSec = Config section //[{csSec}], if NULL unset in *default* section
243: * @csAttr = Config attribute //{csAttr} = ...
244: * @val = Return buffer for item Value //... = {val}
245: * @csDefValue = *Default Value* for return in //{val}, if not found item in config
246: * return: 0 item not found, -1 error or >0 number of copied bytes in //{val}
247: */
248: int
249: cfg_loadAttribute(cfg_root_t * __restrict cfg, const char *csSec, const char *csAttr,
250: ait_val_t * __restrict val, const char *csDefValue)
251: {
252: struct tagCfg *av;
253: int ret = 0;
254:
255: if (!cfg || !csAttr || !val) {
256: cfg_SetErr(EINVAL, "Invalid argument(s)");
257: return -1;
258: }
259:
260: AIT_INIT_VAL(val);
261: av = _selectAttribute(cfg, csSec, csAttr);
262: if (!av) {
263: /* not found item */
264: if (csDefValue) {
265: AIT_SET_STR(val, csDefValue);
266: ret = AIT_LEN(val);
267: } else
268: AIT_INIT_VAL(val);
269: return ret;
270: }
271:
272: if (AIT_ISEMPTY(&av->cfg_val) || !AIT_ADDR(&av->cfg_val) ||
273: !*AIT_GET_LIKE(&av->cfg_val, char*)) {
274: /* empty value */
275: if (csDefValue) {
276: AIT_SET_STR(val, csDefValue);
277: ret = AIT_LEN(val);
278: } else
279: AIT_INIT_VAL(val);
280: } else {
281: /* copy value */
282: AIT_SET_STR(val, AIT_GET_STR(&av->cfg_val));
283: ret = AIT_LEN(val);
284: }
285:
286: return ret;
287: }
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