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126 lines
3.7 KiB
C++
126 lines
3.7 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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*/
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// Original file Copyright Crytek GMBH or its affiliates, used under license.
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#include <platform.h>
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#include "PropertyHelpers.h"
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#include "StringHelpers.h"
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bool PropertyHelpers::GetPropertyValue(const string& a_propertiesString, const char* a_propertyName, string& a_value)
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{
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if ((a_propertyName == 0) || (a_propertyName[0] == 0))
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{
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return false;
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}
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const char* lineStart = a_propertiesString.c_str();
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while (*lineStart)
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{
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string key;
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string value;
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const size_t lineEndPosition = strcspn(lineStart, "\n");
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const size_t equalPosition = strcspn(lineStart, "=");
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if (equalPosition < lineEndPosition)
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{
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key = string(lineStart, equalPosition);
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value = string(lineStart + equalPosition + 1, lineEndPosition - equalPosition - 1);
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}
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else
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{
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key = string(lineStart, lineEndPosition);
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value = "";
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}
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key = StringHelpers::Trim(key);
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if (_stricmp(key.c_str(), a_propertyName) == 0)
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{
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a_value = StringHelpers::Trim(value);
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return true;
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}
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lineStart += lineEndPosition;
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if (*lineStart)
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{
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++lineStart;
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}
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}
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return false;
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}
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void PropertyHelpers::SetPropertyValue(string& a_propertiesString, const char* a_propertyName, const char* a_value)
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{
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if ((a_propertyName == 0) || (a_propertyName[0] == 0))
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{
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return;
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}
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const string newValue = StringHelpers::Trim(string(a_value));
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const char* lineStart = a_propertiesString.c_str();
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while (*lineStart)
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{
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const size_t lineEndPosition = strcspn(lineStart, "\n");
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const size_t equalPosition = strcspn(lineStart, "=");
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const string key = StringHelpers::Trim(string(lineStart, ((equalPosition < lineEndPosition) ? equalPosition : lineEndPosition)));
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if (_stricmp(key.c_str(), a_propertyName) == 0)
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{
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const size_t prefixSz = lineStart - a_propertiesString.c_str();
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const size_t expressionSz = lineEndPosition;
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if (newValue.empty())
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{
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a_propertiesString = a_propertiesString.substr(0, prefixSz) + string(a_propertyName) + a_propertiesString.substr(prefixSz + expressionSz, string::npos);
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}
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else
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{
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a_propertiesString = a_propertiesString.substr(0, prefixSz) + string(a_propertyName) + string("=") + newValue + a_propertiesString.substr(prefixSz + expressionSz, string::npos);
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}
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return;
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}
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lineStart += lineEndPosition;
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if (*lineStart)
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{
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++lineStart;
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}
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}
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if (a_propertiesString.empty() || (a_propertiesString[a_propertiesString.size() - 1] != '\n'))
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{
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a_propertiesString += string("\r\n");
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}
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if (newValue.empty())
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{
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a_propertiesString += string(a_propertyName);
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}
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else
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{
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a_propertiesString += string(a_propertyName) + string("=") + newValue;
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}
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}
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bool PropertyHelpers::HasProperty(const string& a_propertiesString, const char* a_propertyName)
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{
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string value;
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return PropertyHelpers::GetPropertyValue(a_propertiesString, a_propertyName, value);
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}
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