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/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <xalanc/XPathCAPI/XPathCAPI.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
int
CreateXPath(
XalanXPathEvaluatorHandle theXalanHandle,
const char* theXPathExpression,
XalanXPathHandle* theXPathHandle)
{
int theResult = 0;
assert(theXalanHandle);
assert(theXPathHandle);
theResult = XalanCreateXPath(theXalanHandle, theXPathExpression, 0, theXPathHandle);
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Error creating XPath. Error code was %d.\n", theResult);
}
return theResult;
}
int
DestroyXPath(
XalanXPathEvaluatorHandle theXalanHandle,
XalanXPathHandle theXPathHandle)
{
int theResult = 0;
theResult = XalanDestroyXPath(theXalanHandle, theXPathHandle);
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Error creating XPath. Error code was %d.\n", theResult);
}
return theResult;
}
char*
ReadFile(const char* theXMLFileName)
{
char* theBuffer = 0;
FILE* theFile = fopen(theXMLFileName, "rb");
if (theFile == 0)
{
fprintf(stderr, "Unable to open input file %s\n", theXMLFileName);
}
else
{
fseek(theFile, 0, SEEK_END);
{
const int theSize = ftell(theFile);
if (theSize == -1)
{
fprintf(stderr, "Unable to determine the size of the input file\n");
}
else
{
fseek(theFile, SEEK_SET, 0);
theBuffer = (char*)malloc(theSize + 1);
if (theBuffer == 0)
{
fprintf(stderr, "Unable to allocate enough memory. The input file size is %d\n", theSize);
}
else
{
fread(theBuffer, 1, theSize, theFile);
theBuffer[theSize] = '\0';
}
}
}
fclose(theFile);
}
return theBuffer;
}
int
EvaluateXPath(
XalanXPathEvaluatorHandle theXalanHandle,
const char* theXMLFileName,
const char* theXPathExpression,
int* theBoolean)
{
XalanXPathHandle theXPathHandle;
int theResult = CreateXPath(theXalanHandle, theXPathExpression, &theXPathHandle);
if (theResult == XALAN_XPATH_API_SUCCESS)
{
char* theBuffer = ReadFile(theXMLFileName);
if (theBuffer != NULL)
{
theResult = XalanEvaluateXPathAsBoolean(theXalanHandle, theXPathHandle, theBuffer, theBoolean);
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Unable to evaluate XPath expression. Error code was %d.\n", theResult);
}
free(theBuffer);
}
DestroyXPath(theXalanHandle, theXPathHandle);
}
return theResult;
}
int
main(
int argc,
char* argv[])
{
int theResult = 0;
if (argc != 3)
{
fprintf(stderr, "Usage: SimpleXPathAPI XMLFilePath XPathExpression\n");
theResult = -1;
}
else
{
theResult = XalanXPathAPIInitialize();
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Unable to initialize the API. Error code was %d.\n", theResult);
}
else
{
XalanXPathEvaluatorHandle theXalanHandle;
theResult = XalanCreateXPathEvaluator(&theXalanHandle);
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Error creating evaluator. Error code was %d.\n", theResult);
}
else
{
int theBoolean = 0;
theResult = EvaluateXPath(theXalanHandle, argv[1], argv[2], &theBoolean);
if (theResult == XALAN_XPATH_API_SUCCESS)
{
fprintf(stdout, "The result of the expression was '%s'.\n", theBoolean == 0 ? "false" : "true");
}
theResult = XalanDestroyXPathEvaluator(theXalanHandle);
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Error destroying evaluator. Error code was %d.\n", theResult);
}
}
theResult = XalanXPathAPITerminate();
if (theResult != XALAN_XPATH_API_SUCCESS)
{
fprintf(stderr, "Error terminating the API. Error code was %d.\n", theResult);
}
}
}
return theResult;
}
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