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