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

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