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xml.c
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195 lines (175 loc) · 5.82 KB
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#include "xml.h"
#include "shared.h"
#include <stddef.h>
#include <string.h>
#include <unistd.h>
////////////////
// XML Reader //
////////////////
static void xmlTextNOOPErrorFunction(void * arg, const char * msg, xmlParserSeverities severity,
xmlTextReaderLocatorPtr locator) {
}
void xmlReaderSuppressErrors(xmlTextReaderPtr reader) {
xmlTextReaderSetErrorHandler(reader, &xmlTextNOOPErrorFunction, NULL);
}
int stepInto(xmlTextReaderPtr reader) {
// Skip all significant white space
int result;
do {
result = xmlTextReaderRead(reader);
} while (result
&& (xmlTextReaderNodeType(reader) == XML_READER_TYPE_SIGNIFICANT_WHITESPACE
|| xmlTextReaderNodeType(reader) == XML_READER_TYPE_COMMENT
|| xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT));
return result;
}
int stepOver(xmlTextReaderPtr reader) {
int depth = xmlTextReaderDepth(reader);
int result;
do {
result = xmlTextReaderRead(reader);
} while (result && xmlTextReaderDepth(reader) > depth);
while (result
&& (xmlTextReaderNodeType(reader) == XML_READER_TYPE_SIGNIFICANT_WHITESPACE
|| xmlTextReaderNodeType(reader) == XML_READER_TYPE_COMMENT
|| xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT)) {
result = xmlTextReaderRead(reader);
}
return result;
}
int stepOut(xmlTextReaderPtr reader) {
int depth = xmlTextReaderDepth(reader) - 1;
int result;
do {
result = xmlTextReaderRead(reader);
} while (result && xmlTextReaderDepth(reader) > depth);
while (result
&& (xmlTextReaderNodeType(reader) == XML_READER_TYPE_SIGNIFICANT_WHITESPACE
|| xmlTextReaderNodeType(reader) == XML_READER_TYPE_COMMENT
|| xmlTextReaderNodeType(reader) == XML_READER_TYPE_END_ELEMENT)) {
result = xmlTextReaderRead(reader);
}
return result;
}
int stepOverText(xmlTextReaderPtr reader, const char ** text) {
int depth = xmlTextReaderDepth(reader);
int result = stepInto(reader);
*text = NULL;
if (result && xmlTextReaderDepth(reader) > depth) {
if (xmlTextReaderNodeType(reader) == XML_READER_TYPE_TEXT) {
*text = xmlTextReaderValue(reader);
}
result = stepOut(reader);
}
return result;
}
int elementMatches(xmlTextReaderPtr reader, const char * namespace, const char * nodeName) {
return xmlTextReaderNodeType(reader) == XML_READER_TYPE_ELEMENT
&& !strcmp(xmlTextReaderConstNamespaceUri(reader), namespace)
&& !strcmp(xmlTextReaderConstLocalName(reader), nodeName);
}
const char * nodeTypeToName(int nodeType) {
switch (nodeType) {
case XML_READER_TYPE_NONE:
return "XML_READER_TYPE_NONE";
case XML_READER_TYPE_ELEMENT:
return "XML_READER_TYPE_ELEMENT";
case XML_READER_TYPE_ATTRIBUTE:
return "XML_READER_TYPE_ATTRIBUTE";
case XML_READER_TYPE_TEXT:
return "XML_READER_TYPE_TEXT";
case XML_READER_TYPE_CDATA:
return "XML_READER_TYPE_CDATA";
case XML_READER_TYPE_ENTITY_REFERENCE:
return "XML_READER_TYPE_ENTITY_REFERENCE";
case XML_READER_TYPE_ENTITY:
return "XML_READER_TYPE_ENTITY";
case XML_READER_TYPE_PROCESSING_INSTRUCTION:
return "XML_READER_TYPE_PROCESSING_INSTRUCTION";
case XML_READER_TYPE_COMMENT:
return "XML_READER_TYPE_COMMENT";
case XML_READER_TYPE_DOCUMENT:
return "XML_READER_TYPE_DOCUMENT";
case XML_READER_TYPE_DOCUMENT_TYPE:
return "XML_READER_TYPE_DOCUMENT_TYPE";
case XML_READER_TYPE_DOCUMENT_FRAGMENT:
return "XML_READER_TYPE_DOCUMENT_FRAGMENT";
case XML_READER_TYPE_NOTATION:
return "XML_READER_TYPE_NOTATION";
case XML_READER_TYPE_WHITESPACE:
return "XML_READER_TYPE_WHITESPACE";
case XML_READER_TYPE_SIGNIFICANT_WHITESPACE:
return "XML_READER_TYPE_SIGNIFICANT_WHITESPACE";
case XML_READER_TYPE_END_ELEMENT:
return "XML_READER_TYPE_END_ELEMENT";
case XML_READER_TYPE_END_ENTITY:
return "XML_READER_TYPE_END_ENTITY";
case XML_READER_TYPE_XML_DECLARATION:
return "XML_READER_TYPE_XML_DECLARATION";
default:
return NULL;
}
}
////////////////////
// End XML Reader //
////////////////////
/////////////////////
// XML Text Writer //
/////////////////////
static int xmlFdOutputCloseCallback(void * context) {
close(*((int *) context));
freeSafe(context);
return 0;
}
static int xmlFdOutputWriteCallback(void * context, const char * buffer, int len) {
ssize_t ignored = write(*((int *) context), buffer, len);
return ignored;
}
xmlTextWriterPtr xmlNewFdTextWriter(int out) {
xmlOutputBufferPtr outStruct = xmlAllocOutputBuffer(NULL);
outStruct->writecallback = &xmlFdOutputWriteCallback;
outStruct->closecallback = &xmlFdOutputCloseCallback;
outStruct->context = mallocSafe(sizeof(int));
*((int *) outStruct->context) = out;
return xmlNewTextWriter(outStruct);
}
int xmlTextWriterWriteElementString(xmlTextWriterPtr writer, const char * prefix, const char * elementName,
const char * string) {
int ret;
//if (prefix) {
if ((ret = xmlTextWriterStartElementNS(writer, prefix, elementName, NULL)) < 0) return ret;
//} else {
// if ((ret = xmlTextWriterStartElement(writer, elementName)) < 0)
// return ret;
//}
if (string && (ret = xmlTextWriterWriteString(writer, string)) < 0) return ret;
if ((ret = xmlTextWriterEndElement(writer)) < 0) return ret;
return ret;
}
void xmlTextWriterWriteURL(xmlTextWriterPtr writer, const char * url) {
char buffer[1024];
const char * urlPtr = url;
char * writePtr = buffer;
unsigned char c;
while ((c = *(urlPtr++))) {
if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '-' || c == '_'
|| c == '.' || c == '~' || c == '/') {
*(writePtr++) = c;
} else {
static const char * lookup = "0123456789ABCDEF";
*(writePtr++) = '%';
*(writePtr++) = lookup[(c & 0xF0) >> 4];
*(writePtr++) = lookup[c & 0x0F];
}
if (writePtr > buffer + sizeof(buffer) - 5) {
*writePtr = '\0';
xmlTextWriterWriteString(writer, buffer);
writePtr = buffer;
}
}
*writePtr = '\0';
xmlTextWriterWriteString(writer, buffer);
}
/////////////////////////
// End XML Text Writer //
/////////////////////////