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| Current File : //usr/opt/nge/share/doc/libxml2-2.9.12/examples/testXPath.c |
/*
* testXPath.c : a small tester program for XPath.
*
* See Copyright for the status of this software.
*
* daniel@veillard.com
*/
#include "libxml.h"
#if defined(LIBXML_XPATH_ENABLED) && defined(LIBXML_DEBUG_ENABLED)
#include <string.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <libxml/xpath.h>
#include <libxml/tree.h>
#include <libxml/parser.h>
#include <libxml/debugXML.h>
#include <libxml/xmlmemory.h>
#include <libxml/parserInternals.h>
#include <libxml/xpathInternals.h>
#include <libxml/xmlerror.h>
#include <libxml/globals.h>
#if defined(LIBXML_XPTR_ENABLED)
#include <libxml/xpointer.h>
static int xptr = 0;
#endif
static int debug = 0;
static int valid = 0;
static int expr = 0;
static int tree = 0;
static int nocdata = 0;
static xmlDocPtr document = NULL;
/*
* Default document
*/
static xmlChar buffer[] =
"<?xml version=\"1.0\"?>\n\
<EXAMPLE prop1=\"gnome is great\" prop2=\"& linux too\">\n\
<head>\n\
<title>Welcome to Gnome</title>\n\
</head>\n\
<chapter>\n\
<title>The Linux adventure</title>\n\
<p>bla bla bla ...</p>\n\
<image href=\"linus.gif\"/>\n\
<p>...</p>\n\
</chapter>\n\
<chapter>\n\
<title>Chapter 2</title>\n\
<p>this is chapter 2 ...</p>\n\
</chapter>\n\
<chapter>\n\
<title>Chapter 3</title>\n\
<p>this is chapter 3 ...</p>\n\
</chapter>\n\
</EXAMPLE>\n\
";
static void
testXPath(const char *str) {
xmlXPathObjectPtr res;
xmlXPathContextPtr ctxt;
#if defined(LIBXML_XPTR_ENABLED)
if (xptr) {
ctxt = xmlXPtrNewContext(document, NULL, NULL);
res = xmlXPtrEval(BAD_CAST str, ctxt);
} else {
#endif
ctxt = xmlXPathNewContext(document);
ctxt->node = xmlDocGetRootElement(document);
if (expr)
res = xmlXPathEvalExpression(BAD_CAST str, ctxt);
else {
/* res = xmlXPathEval(BAD_CAST str, ctxt); */
xmlXPathCompExprPtr comp;
comp = xmlXPathCompile(BAD_CAST str);
if (comp != NULL) {
if (tree)
xmlXPathDebugDumpCompExpr(stdout, comp, 0);
res = xmlXPathCompiledEval(comp, ctxt);
xmlXPathFreeCompExpr(comp);
} else
res = NULL;
}
#if defined(LIBXML_XPTR_ENABLED)
}
#endif
xmlXPathDebugDumpObject(stdout, res, 0);
xmlXPathFreeObject(res);
xmlXPathFreeContext(ctxt);
}
static void
testXPathFile(const char *filename) {
FILE *input;
char expression[5000];
int len;
input = fopen(filename, "r");
if (input == NULL) {
xmlGenericError(xmlGenericErrorContext,
"Cannot open %s for reading\n", filename);
return;
}
while (fgets(expression, 4500, input) != NULL) {
len = strlen(expression);
len--;
while ((len >= 0) &&
((expression[len] == '\n') || (expression[len] == '\t') ||
(expression[len] == '\r') || (expression[len] == ' '))) len--;
expression[len + 1] = 0;
if (len >= 0) {
printf("\n========================\nExpression: %s\n", expression) ;
testXPath(expression);
}
}
fclose(input);
}
int main(int argc, char **argv) {
int i;
int strings = 0;
int usefile = 0;
char *filename = NULL;
for (i = 1; i < argc ; i++) {
#if defined(LIBXML_XPTR_ENABLED)
if ((!strcmp(argv[i], "-xptr")) || (!strcmp(argv[i], "--xptr")))
xptr++;
else
#endif
if ((!strcmp(argv[i], "-debug")) || (!strcmp(argv[i], "--debug")))
debug++;
else if ((!strcmp(argv[i], "-valid")) || (!strcmp(argv[i], "--valid")))
valid++;
else if ((!strcmp(argv[i], "-expr")) || (!strcmp(argv[i], "--expr")))
expr++;
else if ((!strcmp(argv[i], "-tree")) || (!strcmp(argv[i], "--tree")))
tree++;
else if ((!strcmp(argv[i], "-nocdata")) ||
(!strcmp(argv[i], "--nocdata")))
nocdata++;
else if ((!strcmp(argv[i], "-i")) || (!strcmp(argv[i], "--input")))
filename = argv[++i];
else if ((!strcmp(argv[i], "-f")) || (!strcmp(argv[i], "--file")))
usefile++;
}
if (valid != 0) xmlDoValidityCheckingDefaultValue = 1;
xmlLoadExtDtdDefaultValue |= XML_DETECT_IDS;
xmlLoadExtDtdDefaultValue |= XML_COMPLETE_ATTRS;
xmlSubstituteEntitiesDefaultValue = 1;
#ifdef LIBXML_SAX1_ENABLED
if (nocdata != 0) {
xmlDefaultSAXHandlerInit();
xmlDefaultSAXHandler.cdataBlock = NULL;
}
#endif
if (document == NULL) {
if (filename == NULL)
document = xmlReadDoc(buffer,NULL,NULL,XML_PARSE_COMPACT);
else
document = xmlReadFile(filename,NULL,XML_PARSE_COMPACT);
}
for (i = 1; i < argc ; i++) {
if ((!strcmp(argv[i], "-i")) || (!strcmp(argv[i], "--input"))) {
i++; continue;
}
if (argv[i][0] != '-') {
if (usefile)
testXPathFile(argv[i]);
else
testXPath(argv[i]);
strings ++;
}
}
if (strings == 0) {
printf("Usage : %s [--debug] [--copy] stringsorfiles ...\n",
argv[0]);
printf("\tParse the XPath strings and output the result of the parsing\n");
printf("\t--debug : dump a debug version of the result\n");
printf("\t--valid : switch on DTD support in the parser\n");
#if defined(LIBXML_XPTR_ENABLED)
printf("\t--xptr : expressions are XPointer expressions\n");
#endif
printf("\t--expr : debug XPath expressions only\n");
printf("\t--tree : show the compiled XPath tree\n");
printf("\t--nocdata : do not generate CDATA nodes\n");
printf("\t--input filename : or\n");
printf("\t-i filename : read the document from filename\n");
printf("\t--file : or\n");
printf("\t-f : read queries from files, args\n");
}
if (document != NULL)
xmlFreeDoc(document);
xmlCleanupParser();
xmlMemoryDump();
return(0);
}
#else
#include <stdio.h>
int main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) {
printf("%s : XPath/Debug support not compiled in\n", argv[0]);
return(0);
}
#endif /* LIBXML_XPATH_ENABLED */