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Adding a --xpath option to xmllint

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* xmllint.c: runs in --noout mode and dumps the result of the XPath
  argument query. Still need to be expanded in some ways to allow
  namespace binding.
This commit is contained in:
Daniel Veillard 2009-10-07 10:25:06 +02:00
parent 1e52172358
commit 1934b0c0fa
1 changed files with 130 additions and 9 deletions
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139
xmllint.c
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@ -108,15 +108,16 @@
typedef enum {
XMLLINT_RETURN_OK = 0, /* No error */
XMLLINT_ERR_UNCLASS, /* Unclassified */
XMLLINT_ERR_DTD, /* Error in DTD */
XMLLINT_ERR_VALID, /* Validation error */
XMLLINT_ERR_RDFILE, /* CtxtReadFile error */
XMLLINT_ERR_SCHEMACOMP, /* Schema compilation */
XMLLINT_ERR_OUT, /* Error writing output */
XMLLINT_ERR_SCHEMAPAT, /* Error in schema pattern */
XMLLINT_ERR_RDREGIS, /* Error in Reader registration */
XMLLINT_ERR_MEM /* Out of memory error */
XMLLINT_ERR_UNCLASS = 1, /* Unclassified */
XMLLINT_ERR_DTD = 2, /* Error in DTD */
XMLLINT_ERR_VALID = 3, /* Validation error */
XMLLINT_ERR_RDFILE = 4, /* CtxtReadFile error */
XMLLINT_ERR_SCHEMACOMP = 5, /* Schema compilation */
XMLLINT_ERR_OUT = 6, /* Error writing output */
XMLLINT_ERR_SCHEMAPAT = 7, /* Error in schema pattern */
XMLLINT_ERR_RDREGIS = 8, /* Error in Reader registration */
XMLLINT_ERR_MEM = 9, /* Out of memory error */
XMLLINT_ERR_XPATH = 10 /* XPath evaluation error */
} xmllintReturnCode;
#ifdef LIBXML_DEBUG_ENABLED
static int shell = 0;
@ -201,6 +202,9 @@ static const char *pattern = NULL;
static xmlPatternPtr patternc = NULL;
static xmlStreamCtxtPtr patstream = NULL;
#endif
#ifdef LIBXML_XPATH_ENABLED
static const char *xpathquery = NULL;
#endif
static int options = XML_PARSE_COMPACT;
static int sax = 0;
static int oldxml10 = 0;
@ -2050,6 +2054,100 @@ static void walkDoc(xmlDocPtr doc) {
}
#endif /* LIBXML_READER_ENABLED */
#ifdef LIBXML_XPATH_ENABLED
/************************************************************************
* *
* XPath Query *
* *
************************************************************************/
static void doXPathDump(xmlXPathObjectPtr cur) {
switch(cur->type) {
case XPATH_NODESET: {
int i;
xmlNodePtr node;
#ifdef LIBXML_OUTPUT_ENABLED
xmlSaveCtxtPtr ctxt;
if (cur->nodesetval->nodeNr <= 0) {
fprintf(stderr, "XPath set is empty\n");
progresult = XMLLINT_ERR_XPATH;
break;
}
ctxt = xmlSaveToFd(1, NULL, 0);
if (ctxt == NULL) {
fprintf(stderr, "Out of memory for XPath\n");
progresult = XMLLINT_ERR_MEM;
return;
}
for (i = 0;i < cur->nodesetval->nodeNr;i++) {
node = cur->nodesetval->nodeTab[i];
xmlSaveTree(ctxt, node);
}
xmlSaveClose(ctxt);
#else
printf("xpath returned %d nodes\n", cur->nodesetval->nodeNr);
#endif
break;
}
case XPATH_BOOLEAN:
if (cur->boolval) printf("true");
else printf("false");
break;
case XPATH_NUMBER:
switch (xmlXPathIsInf(cur->floatval)) {
case 1:
printf("Infinity");
break;
case -1:
printf("-Infinity");
break;
default:
if (xmlXPathIsNaN(cur->floatval)) {
printf("NaN");
} else {
printf("%0g", cur->floatval);
}
}
break;
case XPATH_STRING:
printf("%s", (const char *) cur->stringval);
break;
case XPATH_UNDEFINED:
fprintf(stderr, "XPath Object is uninitialized\n");
progresult = XMLLINT_ERR_XPATH;
break;
default:
fprintf(stderr, "XPath object of unexpected type\n");
progresult = XMLLINT_ERR_XPATH;
break;
}
}
static void doXPathQuery(xmlDocPtr doc, const char *query) {
xmlXPathContextPtr ctxt;
xmlXPathObjectPtr res;
ctxt = xmlXPathNewContext(doc);
if (ctxt == NULL) {
fprintf(stderr, "Out of memory for XPath\n");
progresult = XMLLINT_ERR_MEM;
return;
}
ctxt->node = xmlDocGetRootElement(doc);
res = xmlXPathEval(BAD_CAST query, ctxt);
xmlXPathFreeContext(ctxt);
if (res == NULL) {
fprintf(stderr, "XPath evaluation failure\n");
progresult = XMLLINT_ERR_XPATH;
return;
}
doXPathDump(res);
xmlXPathFreeObject(res);
}
#endif /* LIBXML_XPATH_ENABLED */
/************************************************************************
* *
* Tree Test processing *
@ -2318,6 +2416,12 @@ static void parseAndPrintFile(char *filename, xmlParserCtxtPtr rectxt) {
}
#endif
#ifdef LIBXML_XPATH_ENABLED
if (xpathquery != NULL) {
doXPathQuery(doc, xpathquery);
}
#endif
#ifdef LIBXML_DEBUG_ENABLED
#ifdef LIBXML_XPATH_ENABLED
/*
@ -2945,6 +3049,9 @@ static void usage(const char *name) {
#endif
printf("\t--sax: do not build a tree but work just at the SAX level\n");
printf("\t--oldxml10: use XML-1.0 parsing rules before the 5th edition\n");
#ifdef LIBXML_XPATH_ENABLED
printf("\t--xpath expr: evaluate the XPath expression, inply --noout\n");
#endif
printf("\nLibxml project home page: http://xmlsoft.org/\n");
printf("To report bugs or get some help check: http://xmlsoft.org/bugs.html\n");
@ -3284,6 +3391,13 @@ main(int argc, char **argv) {
(!strcmp(argv[i], "--pattern"))) {
i++;
pattern = argv[i];
#endif
#ifdef LIBXML_XPATH_ENABLED
} else if ((!strcmp(argv[i], "-xpath")) ||
(!strcmp(argv[i], "--xpath"))) {
i++;
noout++;
xpathquery = argv[i];
#endif
} else if ((!strcmp(argv[i], "-oldxml10")) ||
(!strcmp(argv[i], "--oldxml10"))) {
@ -3515,6 +3629,13 @@ main(int argc, char **argv) {
i++;
continue;
}
#endif
#ifdef LIBXML_XPATH_ENABLED
if ((!strcmp(argv[i], "-xpath")) ||
(!strcmp(argv[i], "--xpath"))) {
i++;
continue;
}
#endif
if ((timing) && (repeat))
startTimer();