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// XML_Reader.cpp - base class for XML type readers
#include <iostream.h>
#include <qstring.h>
#include <qstringlist.h>
#include "xml_reader.h"
// *****************************
// General XML parsing functions
// *****************************
// function to see if tag is 'self-contained', i.e.:
// <bond>data</bond> returns false
// <bond data="x"/> returns true
// (returns true if tag ends in "/>"
bool XML_Reader::SelfContainedTag(QString tag) {
if (tag.right(2) == "/>")
return true;
else
return false;
}
// function to extract tags from stream
QString XML_Reader::ReadTag(QString f, int &ptr) {
int t1 = f.find("<", ptr);
ptr = t1;
int t2 = f.find(">", ptr);
ptr = t2 + 1;
return f.mid(t1, ptr - t1).ascii();
}
// function to extract data between tags
QString XML_Reader::ReadData(QString f, int &ptr) {
int t1 = f.find("<", ptr);
return f.mid(ptr, t1 - ptr);
}
// function to extract attributes from tag
// Return format: list item 0=first attribute, 1=value of first attribute,
// 2=second attribute, 3=value of second attribute, you get it, right?
QStringList XML_Reader::ReadAttr(QString tag) {
QStringList l1;
QString attr;
QString a1, v1;
int t1, eq1, te;
// where to start tokenizing
int ptr = tag.find(QString(" "));
// where to end tokenizing
int eol = tag.find(QString(">"));
// exit gracefully if no attributes
if (tag.find("=") < 0) return l1;
do {
while (tag[ptr].isSpace()) { ptr++; }
t1 = tag.find(QString("\""), ptr);
te = tag.find(QString("\""), t1 + 1);
attr = tag.mid(ptr, te - ptr + 1);
ptr = te + 1;
eq1 = attr.find(QString("="));
a1 = attr.left(eq1);
v1 = attr.right(attr.length() - eq1 - 1);
v1 = v1.mid(1, v1.length() - 2);
if (a1.find(QString(">")) >= 0) break; // end of tags
//cout << "[" << a1 << "=" << v1 << "]" << endl;
l1.append(a1); l1.append(v1);
} while (ptr < eol);
return l1;
}
// function to tokenize
QStringList XML_Reader::Tokenize(QString tag) {
QStringList l1;
QString a1, tag1;
int t1;
// strip leading and trailing white space
tag1 = tag.simplifyWhiteSpace();
// where to start tokenizing
int ptr = 0;
// where to end tokenizing
int eol = tag1.findRev(QString(" "));
do {
t1 = tag1.find(QString(" "), ptr);
a1 = tag1.mid(ptr, t1 - ptr);
ptr = t1 + 1;
l1.append(a1);
cout << "[" << a1 << "]" << endl;
} while (ptr < eol);
a1 = tag1.mid(ptr);
l1.append(a1);
return l1;
}
// ParseBoundingBox(): parse CDXML BoundingBox element.
void XML_Reader::ParseBoundingBox(QString BBox, double &x1, double &y1,
double &x2, double &y2) {
int s1 = BBox.find(QString(" "), 0);
int s2 = BBox.find(QString(" "), s1 + 1);
int s3 = BBox.find(QString(" "), s2 + 1);
//cout << BBox.mid(0, s1) << "|";
//cout << BBox.mid(s1 + 1, s2 - s1) << "|";
//cout << BBox.mid(s2 + 1, s3 - s2) << "|";
//cout << BBox.mid(s3 + 1) << "|" << endl;
x1 = BBox.mid(0, s1).toDouble();
y1 = BBox.mid(s1 + 1, s2 - s1).toDouble();
x2 = BBox.mid(s2 + 1, s3 - s2).toDouble();
y2 = BBox.mid(s3 + 1).toDouble();
}
// make sure we get the correct close tag
// e.g., if passed <n><b>xyz</b><n><b>zyx</b></n></n>, return the correct
// outer tag (the last </n>)
// note this returns a relative reference, from beginning of wtag.
int XML_Reader::PositionOfEndTag(QString wtag, QString tname) {
int depth = 0, curpos = 0;
int i1, i2;
//cout << "l:" << tname.length() << endl;
do {
i1 = wtag.find(tname, curpos);
//cout << i1 << "," << depth << endl;
i2 = wtag.find(">", i1);
if (wtag[i2 - 1] != '/') { // skip self-contained tags
if (wtag[i1 - 1] == '<') depth++;
if (wtag[i1 - 1] == '/') depth--;
if (depth == 0) break;
}
curpos = i1 + 1;
} while (1);
i2 = i1 + tname.length() + 1;
//cout << "r:" << i2 << endl;
return i2;
}
// *********************
// end parsing functions
// *********************
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