📄 testxpath.c
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/* * 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;#endifstatic 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 voidtestXPath(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 voidtestXPathFile(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; if (nocdata != 0) { xmlDefaultSAXHandlerInit(); xmlDefaultSAXHandler.cdataBlock = NULL; } 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 */⌨️ 快捷键说明
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