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135 lines
4.2 KiB
135 lines
4.2 KiB
/*
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* Copyright (c) 2017 - 2018, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define LOG_TAG "ConfigParser"
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#include <errno.h>
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#include <utils/Log.h>
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#include <sys/mman.h>
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#include "PlatformConfig.h"
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#include "ConfigParser.h"
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namespace Platform {
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#define BUF_SIZE 1024
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void ConfigParser::processProperty(const XML_Char **attr, ConfigMap &configMap) {
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if (strcmp(attr[0], "name") != 0) {
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VIDC_PLAT_LOGH("%s: Element 'name' not found!", __func__);
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return;
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}
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std::string propName(attr[1]);
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if (strcmp(attr[2], "value") != 0) {
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VIDC_PLAT_LOGH("%s: Element 'value' not found for %s!", __func__, propName.c_str());
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return;
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}
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std::string propValue(attr[3]);
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configMap[propName] = propValue;
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return;
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}
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void ConfigParser::startTag(void *userdata, const XML_Char *tagName,
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const XML_Char **attr) {
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if (strcmp(tagName, "property") == 0) {
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processProperty(attr, *static_cast<ConfigMap *>(userdata));
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}
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return;
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}
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void ConfigParser::endTag(void *userdata __unused, const XML_Char *tagName __unused) {
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return;
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}
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int ConfigParser::initAndParse(std::string configFile, ConfigMap &configMap) {
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int err = 1;
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XML_Parser parser;
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FILE *file;
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file = fopen(configFile.c_str(), "r");
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if (!file) {
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VIDC_PLAT_LOGH("%s: Error: %d (%s). Using defaults!",
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__func__, errno, strerror(errno));
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return err;
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}
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// Create Parser
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parser = XML_ParserCreate(NULL);
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if (!parser) {
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VIDC_PLAT_LOGH("%s: Failed to create XML parser!", __func__);
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err = -ENODEV;
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goto fileError;
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}
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// Set XML element handlers
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XML_SetUserData(parser, &configMap);
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XML_SetElementHandler(parser, startTag, endTag);
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void *buf;
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int bytesRead;
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// Parse
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while (1) {
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buf = XML_GetBuffer(parser, BUF_SIZE);
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if (buf == NULL) {
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VIDC_PLAT_LOGH("%s: XML_GetBuffer failed", __func__);
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err = -ENOMEM;
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goto parserError;
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}
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bytesRead = fread(buf, 1, BUF_SIZE, file);
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if (bytesRead < 0) {
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VIDC_PLAT_LOGH("%s: fread failed, bytes read = %d", __func__, bytesRead);
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err = bytesRead;
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goto parserError;
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}
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if (XML_ParseBuffer(parser, bytesRead,
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bytesRead == 0) == XML_STATUS_ERROR) {
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VIDC_PLAT_LOGH("%s: XML_ParseBuffer failed, for %s",
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__func__, configFile.c_str());
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err = -EINVAL;
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goto parserError;
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}
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if (bytesRead == 0)
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break;
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}
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// Free parser and close file in error/ at exit
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parserError:
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XML_ParserFree(parser);
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fileError:
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fclose(file);
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return err;
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}
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}
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