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<h1>url-xml.c</h1><a href="url-xml_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001
00010 <span class="comment">/* $Progeny$</span>
00011 <span class="comment"> *</span>
00012 <span class="comment"> * AUTHOR: John R. Daily <jdaily@progeny.com></span>
00013 <span class="comment"> *</span>
00014 <span class="comment"> * Copyright 2002 Progeny Linux Systems, Inc.</span>
00015 <span class="comment"> * Copyright 2002 Hewlett-Packard Company</span>
00016 <span class="comment"> *</span>
00017 <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span>
00018 <span class="comment"> * copy of this software and associated documentation files (the "Software"),</span>
00019 <span class="comment"> * to deal in the Software without restriction, including without limitation</span>
00020 <span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span>
00021 <span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span>
00022 <span class="comment"> * Software is furnished to do so, subject to the following conditions:</span>
00023 <span class="comment"> *</span>
00024 <span class="comment"> * The above copyright notice and this permission notice shall be included in</span>
00025 <span class="comment"> * all copies or substantial portions of the Software.</span>
00026 <span class="comment"> *</span>
00027 <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span>
00028 <span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span>
00029 <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</span>
00030 <span class="comment"> * THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span>
00031 <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span>
00032 <span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span>
00033 <span class="comment"> * DEALINGS IN THE SOFTWARE.</span>
00034 <span class="comment"> */</span>
00035
00036 <span class="preprocessor">#include "config.h"</span>
00037
00038 <span class="preprocessor">#include <assert.h></span>
00039 <span class="preprocessor">#include <string.h></span>
00040
00041 <span class="preprocessor">#include <expat.h></span>
00042
00043 <span class="preprocessor">#include <<a class="code" href="discover_8h.html">discover/discover.h</a>></span>
00044 <span class="preprocessor">#include <<a class="code" href="discover-conf_8h.html">discover/discover-conf.h</a>></span>
00045 <span class="preprocessor">#include <<a class="code" href="discover-xml_8h.html">discover/discover-xml.h</a>></span>
00046
00047 <span class="preprocessor">#include <discover/load-url.h></span>
00048 <span class="preprocessor">#include <discover/url-xml.h></span>
00049 <span class="preprocessor">#include <discover/utils.h></span>
00050
<a name="l00052"></a><a class="code" href="url-xml_8c.html#a22">00052</a> <span class="keyword">enum</span> <a class="code" href="conf_8c.html#a33">state</a> { START, DISCOVER_DATA };
00053 <span class="keyword">struct </span>context {
00054 <span class="keyword">enum</span> <a class="code" href="conf_8c.html#a33">state</a> <a class="code" href="conf_8c.html#a33">state</a>;
00055
00056 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *urls;
00057 <span class="keywordtype">int</span> unknown_level; <span class="comment">/* How deep are we into unknown XML tags? */</span>
00058 };
00059
00060 <span class="keyword">static</span> <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *xml_urls = NULL;
00061 <span class="keyword">static</span> <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *data_urls[<a class="code" href="group__types.html#ga14">BUS_COUNT</a>][3];
00062
00063 <span class="keyword">static</span> <span class="keywordtype">char</span> *known_url_elements[] = {
00064 <span class="stringliteral">"location"</span>,
00065 <span class="stringliteral">"discover-data"</span>,
00066 NULL
00067 };
00068
00069
00070 <span class="keyword">static</span> <span class="keywordtype">bool</span>
00071 unknown_url_element(<span class="keyword">const</span> XML_Char * <span class="keyword">const</span> tag)
00072 {
00073 <span class="keywordtype">int</span> i;
00074 <span class="keywordflow">for</span> (i = 0; known_url_elements[i] != NULL; i++) {
00075 <span class="keywordflow">if</span> (strcmp(tag, known_url_elements[i]) == 0)
00076 <span class="keywordflow">return</span> <span class="keyword">false</span>;
00077 }
00078 <span class="keywordflow">return</span> <span class="keyword">true</span>;
00079 }
00080
00081 <span class="keyword">static</span> <span class="keywordtype">void</span>
00082 add_location(<span class="keyword">struct</span> context *context, <span class="keyword">const</span> XML_Char *attrs[])
00083 {
00084 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *<span class="keyword">new</span>;
00085 <span class="keywordtype">int</span> i;
00086
00087 assert(context != NULL);
00088 assert(attrs != NULL);
00089
00090 <span class="keyword">new</span> = <a class="code" href="group__url__xml.html#ga4">discover_xml_url_new</a>();
00091
00092 <span class="keywordflow">for</span> (i = 0; attrs[i]; i += 2) {
00093 <span class="keywordflow">if</span> (strcmp(attrs[i], <span class="stringliteral">"url"</span>) == 0) {
00094 <span class="keyword">new</span>->url = _discover_xstrdup(attrs[i + 1]);
00095 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(attrs[i], <span class="stringliteral">"bus"</span>) == 0) {
00096 <span class="keyword">new</span>->bus = _discover_xstrdup(attrs[i + 1]);
00097 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (strcmp(attrs[i], <span class="stringliteral">"type"</span>) == 0) {
00098 <span class="keyword">new</span>->type = _discover_xstrdup(attrs[i + 1]);
00099 }
00100 }
00101
00102 <span class="keywordflow">if</span> (context->urls) {
00103 <span class="keywordflow">if</span> (context->urls->last) {
00104 context->urls->last->next = <span class="keyword">new</span>;
00105 } <span class="keywordflow">else</span> {
00106 context->urls->next = <span class="keyword">new</span>;
00107 }
00108 context->urls->last = <span class="keyword">new</span>;
00109 } <span class="keywordflow">else</span> {
00110 context->urls = <span class="keyword">new</span>;
00111 context->urls->next = context->urls->last = NULL;
00112 }
00113 }
00114
00115 <span class="keyword">static</span> <span class="keywordtype">void</span>
00116 start_element(<span class="keywordtype">void</span> *ctx, <span class="keyword">const</span> XML_Char *name, <span class="keyword">const</span> XML_Char *attrs[])
00117 {
00118 <span class="keyword">struct </span>context *context = ctx;
00119
00120 assert(context != NULL);
00121 assert(name != NULL);
00122
00123 <span class="keywordflow">if</span> (unknown_url_element(name)) {
00124 context->unknown_level++;
00125 <span class="keywordflow">return</span>;
00126 }
00127
00128 <span class="keywordflow">if</span> (context->unknown_level > 0) {
00129 <span class="keywordflow">return</span>;
00130 }
00131
00132 <span class="keywordflow">switch</span> (context->state) {
00133 <span class="keywordflow">case</span> START:
00134 <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"discover-data"</span>) == 0) {
00135 context->state = DISCOVER_DATA;
00136 }
00137 <span class="keywordflow">break</span>;
00138
00139 <span class="keywordflow">case</span> DISCOVER_DATA:
00140 <span class="keywordflow">if</span> (strcmp(name, <span class="stringliteral">"location"</span>) == 0) {
00141 add_location(context, attrs);
00142 }
00143 <span class="keywordflow">break</span>;
00144 }
00145 }
00146
00147 <span class="keyword">static</span> <span class="keywordtype">void</span>
00148 end_element(<span class="keywordtype">void</span> *ctx, <span class="keyword">const</span> XML_Char *name)
00149 {
00150 <span class="keyword">struct </span>context *context = ctx;
00151
00152 assert(context != NULL);
00153 assert(name != NULL);
00154
00155 <span class="keywordflow">if</span> (unknown_url_element(name)) {
00156 context->unknown_level--;
00157 <span class="keywordflow">return</span>;
00158 }
00159
00160 <span class="keywordflow">if</span> (context->unknown_level > 0) {
00161 <span class="keywordflow">return</span>;
00162 }
00163
00164 <span class="comment">/*</span>
00165 <span class="comment"> * We don't have any end tags to worry about, but if we did, they</span>
00166 <span class="comment"> * would be handled here.</span>
00167 <span class="comment"> */</span>
00168 }
00169
00181 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *
<a name="l00182"></a><a class="code" href="group__url__xml.html#ga0">00182</a> <a class="code" href="group__url__xml.html#ga0">discover_xml_get_urls</a>(<a class="code" href="structdiscover__error.html">discover_error_t</a> *status)
00183 {
00184 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *urls, *i;
00185 XML_Parser parser;
00186 <span class="keyword">struct </span>context context;
00187 <span class="keywordtype">int</span> loaded_urls = 0;
00188
00189 assert(status != NULL);
00190
00191 status-><a class="code" href="structdiscover__error.html#o0">code</a> = 0;
00192
00193 <span class="keywordflow">if</span> (!xml_urls) {
00194 context.state = START;
00195 context.urls = NULL;
00196 context.unknown_level = 0;
00197
00198 urls = <a class="code" href="group__conf.html#ga7">discover_conf_get_urls</a>(status);
00199 <span class="keywordflow">if</span> (status->code != 0) {
00200 <span class="keywordflow">return</span> NULL;
00201 }
00202
00203 <span class="keywordflow">for</span> (i = urls;
00204 i;
00205 i = i->next) {
00206 parser = XML_ParserCreate(NULL);
00207 XML_SetElementHandler(parser, start_element, end_element);
00208 XML_SetUserData(parser, &context);
00209
00210 <span class="keywordflow">if</span> (_discover_load_url(i->url, parser)) {
00211 loaded_urls++;
00212 }
00213
00214 }
00215
00216 <span class="keywordflow">if</span> (loaded_urls == 0) {
00217 <a class="code" href="group__url__xml.html#ga12">discover_xml_url_free</a>(context.urls);
00218 XML_ParserFree(parser);
00219 status->code = <a class="code" href="group__types.html#gga15a16">DISCOVER_EIO</a>;
00220 <span class="keywordflow">return</span> NULL;
00221 }
00222
00223 <span class="keywordflow">if</span> (!XML_Parse(parser, <span class="stringliteral">""</span>, 0, 1)) {
00224 status->code = <a class="code" href="group__types.html#gga15a17">DISCOVER_EXML</a>;
00225 }
00226
00227 XML_ParserFree(parser);
00228 xml_urls = context.urls;
00229
00230 <span class="comment">/* This must be done here because there could be bogus status left</span>
00231 <span class="comment"> * over from the XML_Parse check above. (We assume something good</span>
00232 <span class="comment"> * happened by this point.)</span>
00233 <span class="comment"> */</span>
00234 status->code = 0;
00235 }
00236
00237 <span class="keywordflow">return</span> xml_urls;
00238 }
00239
00243 <span class="keywordtype">void</span>
<a name="l00244"></a><a class="code" href="group__url__xml.html#ga1">00244</a> <a class="code" href="group__url__xml.html#ga1">discover_xml_free_urls</a>(<span class="keywordtype">void</span>)
00245 {
00246 <span class="keywordflow">if</span> (xml_urls) {
00247 <a class="code" href="group__url__xml.html#ga12">discover_xml_url_free</a>(xml_urls);
00248 xml_urls = NULL;
00249 }
00250 }
00251
00260 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *
<a name="l00261"></a><a class="code" href="group__url__xml.html#ga2">00261</a> <a class="code" href="group__url__xml.html#ga2">discover_xml_get_data_urls</a>(<a class="code" href="group__types.html#ga16">discover_bus_t</a> bus, <a class="code" href="group__types.html#ga17">discover_filetype_t</a> filetype,
00262 <a class="code" href="structdiscover__error.html">discover_error_t</a> *status)
00263 {
00264 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *urls, *i, *<span class="keyword">new</span>;
00265 <span class="keywordtype">char</span> *busname = <a class="code" href="group__conf.html#ga9">discover_conf_get_bus_name</a>(bus);
00266 <span class="keywordtype">char</span> *filetypename = <a class="code" href="group__conf.html#ga10">discover_conf_get_filetype_name</a>(filetype);
00267
00268 assert(status != NULL);
00269 assert(busname != NULL);
00270
00271 status-><a class="code" href="structdiscover__error.html#o0">code</a> = 0;
00272
00273 <span class="keywordflow">if</span> (!data_urls[bus][filetype]) {
00274 urls = <a class="code" href="group__url__xml.html#ga0">discover_xml_get_urls</a>(status);
00275 <span class="keywordflow">if</span> (status->code != 0) {
00276 <span class="keywordflow">return</span> NULL;
00277 }
00278
00279 status->code = <a class="code" href="group__types.html#gga15a21">DISCOVER_EDATANOTFOUND</a>;
00280 <span class="keywordflow">for</span> (i = urls;
00281 i;
00282 i = i->next) {
00283 <span class="keywordflow">if</span> (strcmp(i->bus, busname) == 0
00284 && strcmp(i->type, filetypename) == 0) {
00285
00286 status->code = 0;
00287
00288 <span class="keyword">new</span> = <a class="code" href="group__url__xml.html#ga4">discover_xml_url_new</a>();
00289 <a class="code" href="group__url__xml.html#ga5">discover_xml_url_copy</a>(i, <span class="keyword">new</span>);
00290
00291 <span class="keywordflow">if</span> (data_urls[bus][filetype]) {
00292 data_urls[bus][filetype]->last->next = <span class="keyword">new</span>;
00293 data_urls[bus][filetype]->last = <span class="keyword">new</span>;
00294 } <span class="keywordflow">else</span> {
00295 data_urls[bus][filetype] = <span class="keyword">new</span>;
00296 data_urls[bus][filetype]->last = <span class="keyword">new</span>;
00297 data_urls[bus][filetype]->next = NULL;
00298 }
00299 }
00300 }
00301 }
00302
00303 <span class="keywordflow">return</span> data_urls[bus][filetype];
00304 }
00305
00309 <span class="keywordtype">void</span>
<a name="l00310"></a><a class="code" href="group__url__xml.html#ga3">00310</a> <a class="code" href="group__url__xml.html#ga3">discover_xml_free_data_urls</a>(<span class="keywordtype">void</span>)
00311 {
00312 <span class="keywordtype">int</span> b, f;
00313
00314 <span class="keywordflow">for</span>(b = 0; b < <a class="code" href="group__types.html#ga14">BUS_COUNT</a>; b++) {
00315 <span class="keywordflow">for</span>(f = 0; f < 3; f++) {
00316 <a class="code" href="group__url__xml.html#ga12">discover_xml_url_free</a>(data_urls[b][f]);
00317 data_urls[b][f] = NULL;
00318 }
00319 }
00320 }
00321
00325 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *
<a name="l00326"></a><a class="code" href="group__url__xml.html#ga4">00326</a> <a class="code" href="group__url__xml.html#ga4">discover_xml_url_new</a>(<span class="keywordtype">void</span>)
00327 {
00328 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *<span class="keyword">new</span>;
00329
00330 <span class="keyword">new</span> = _discover_xmalloc(<span class="keyword">sizeof</span>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a>));
00331
00332 <span class="keyword">new</span>->url = NULL;
00333 <span class="keyword">new</span>->bus = NULL;
00334 <span class="keyword">new</span>->type = NULL;
00335 <span class="keyword">new</span>->label = NULL;
00336 <span class="keyword">new</span>->next = NULL;
00337 <span class="keyword">new</span>->last = NULL;
00338
00339 <span class="keywordflow">return</span> <span class="keyword">new</span>;
00340 }
00341
00348 <span class="keywordtype">void</span>
<a name="l00349"></a><a class="code" href="group__url__xml.html#ga5">00349</a> <a class="code" href="group__url__xml.html#ga5">discover_xml_url_copy</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *src,
00350 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *dst)
00351 {
00352 assert(src != NULL);
00353 assert(dst != NULL);
00354
00355 <span class="keywordflow">if</span> (src->url) {
00356 dst->url = _discover_xstrdup(src->url);
00357 }
00358
00359 <span class="keywordflow">if</span> (src->bus) {
00360 dst->bus = _discover_xstrdup(src->bus);
00361 }
00362
00363 <span class="keywordflow">if</span> (src->type) {
00364 dst->type = _discover_xstrdup(src->type);
00365 }
00366
00367 <span class="keywordflow">if</span> (src->label) {
00368 dst->label = _discover_xstrdup(src->label);
00369 }
00370 }
00371
00375 <span class="keywordtype">char</span> *
<a name="l00376"></a><a class="code" href="group__url__xml.html#ga6">00376</a> <a class="code" href="group__url__xml.html#ga6">discover_xml_url_get_url</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url)
00377 {
00378 assert(url != NULL);
00379
00380 <span class="keywordflow">return</span> url->url;
00381 }
00382
00386 <span class="keywordtype">char</span> *
<a name="l00387"></a><a class="code" href="group__url__xml.html#ga7">00387</a> <a class="code" href="group__url__xml.html#ga7">discover_xml_url_get_label</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url)
00388 {
00389 assert(url != NULL);
00390
00391 <span class="keywordflow">return</span> url->label;
00392 }
00393
00397 <span class="keywordtype">char</span> *
<a name="l00398"></a><a class="code" href="group__url__xml.html#ga8">00398</a> <a class="code" href="group__url__xml.html#ga8">discover_xml_url_get_bus</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url)
00399 {
00400 assert(url != NULL);
00401
00402 <span class="keywordflow">return</span> url->bus;
00403 }
00404
00408 <span class="keywordtype">char</span> *
<a name="l00409"></a><a class="code" href="group__url__xml.html#ga9">00409</a> <a class="code" href="group__url__xml.html#ga9">discover_xml_url_get_type</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url)
00410 {
00411 assert(url != NULL);
00412
00413 <span class="keywordflow">return</span> url->type;
00414 }
00415
00419 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *
<a name="l00420"></a><a class="code" href="group__url__xml.html#ga10">00420</a> <a class="code" href="group__url__xml.html#ga10">discover_xml_url_get_next</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url)
00421 {
00422 assert(url != NULL);
00423
00424 <span class="keywordflow">return</span> url->next;
00425 }
00426
00430 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *
<a name="l00431"></a><a class="code" href="group__url__xml.html#ga11">00431</a> <a class="code" href="group__url__xml.html#ga11">discover_xml_url_get_last</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url)
00432 {
00433 assert(url != NULL);
00434
00435 <span class="keywordflow">return</span> url->last;
00436 }
00437
00443 <span class="keywordtype">void</span>
<a name="l00444"></a><a class="code" href="group__url__xml.html#ga12">00444</a> <a class="code" href="group__url__xml.html#ga12">discover_xml_url_free</a>(<a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *urls)
00445 {
00446 <a class="code" href="group__types.html#ga7">discover_xml_url_t</a> *url, *last;
00447
00448 last = NULL;
00449
00450 <span class="keywordflow">for</span> (url = urls;
00451 url;
00452 url = url->next) {
00453 <span class="keywordflow">if</span> (url->url) {
00454 free(url->url);
00455 }
00456
00457 <span class="keywordflow">if</span> (url->bus) {
00458 free(url->bus);
00459 }
00460
00461 <span class="keywordflow">if</span> (url->type) {
00462 free(url->type);
00463 }
00464
00465 <span class="keywordflow">if</span> (url->label) {
00466 free(url->label);
00467 }
00468
00469 <span class="keywordflow">if</span> (last) {
00470 free(last);
00471 }
00472 last = url;
00473 }
00474
00475 <span class="keywordflow">if</span> (last) {
00476 free(last);
00477 }
00478 }
00479
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Thu Jul 28 03:38:00 2005 for discover by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address>
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