annotate base/StringBits.cpp @ 1008:d9e0e59a1581

When using an aggregate model to pass data to a transform, zero-pad the shorter input to the duration of the longer rather than truncating the longer. (This is better behaviour for e.g. MATCH, and in any case the code was previously truncating incorrectly and ending up with garbage data at the end.)

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

/*
   This is a modified version of a source file from the 
   Rosegarden MIDI and audio sequencer and notation editor.
   This file copyright 2000-2010 Chris Cannam.
*/

#include "StringBits.h"

double
StringBits::stringToDoubleLocaleFree(QString s, bool *ok)
{
    int dp = 0;
    int sign = 1;
    int i = 0;
    double result = 0.0;
    int len = s.length();

    result = 0.0;

    if (ok) *ok = true;

    while (i < len && s[i].isSpace()) ++i;
    if (i < len && s[i] == '-') sign = -1;

    while (i < len) {

	QChar c = s[i];

        if (c.isDigit()) {

            double d = c.digitValue();

            if (dp > 0) {
                for (int p = dp; p > 0; --p) d /= 10.0;
                ++dp;
            } else {
                result *= 10.0;
            }

            result += d;

        } else if (c == '.') {

            dp = 1;

        } else if (ok) {
            *ok = false;
        }

        ++i;
    }

    return result * sign;
}
    
QStringList
StringBits::splitQuoted(QString s, QChar separator)
{
    QStringList tokens;
    QString tok;

    enum { sep, unq, q1, q2 } mode = sep;

    for (int i = 0; i < s.length(); ++i) {
	
	QChar c = s[i];

	if (c == '\'') {
	    switch (mode) {
	    case sep: mode = q1; break;
	    case unq: case q2: tok += c; break;
	    case q1: mode = sep; tokens << tok; tok = ""; break;
	    }

	} else if (c == '"') {
	    switch (mode) {
	    case sep: mode = q2; break;
	    case unq: case q1: tok += c; break;
	    case q2: mode = sep; tokens << tok; tok = ""; break;
	    }

	} else if (c == separator || (separator == ' ' && c.isSpace())) {
	    switch (mode) {
	    case sep: if (separator != ' ') tokens << ""; break;
	    case unq: mode = sep; tokens << tok; tok = ""; break;
	    case q1: case q2: tok += c; break;
	    }

	} else if (c == '\\') {
	    if (++i < s.length()) {
		c = s[i];
		switch (mode) {
		case sep: mode = unq; tok += c; break;
                case unq: case q1: case q2: tok += c; break;
		}
	    }

	} else {
	    switch (mode) {
	    case sep: mode = unq; tok += c; break;
            case unq: case q1: case q2: tok += c; break;
	    }
	}
    }

    if (tok != "" || mode != sep) tokens << tok;
    return tokens;
}

/*

void testSplit()
{
    QStringList tests;
    tests << "a b c d";
    tests << "a \"b c\" d";
    tests << "a 'b c' d";
    tests << "a \"b c\\\" d\"";
    tests << "a 'b c\\' d'";
    tests << "a \"b c' d\"";
    tests << "a 'b c\" d'";
    tests << "aa 'bb cc\" dd'";
    tests << "a'a 'bb' \\\"cc\" dd\\\"";
    tests << "  a'a \\\'	 'bb'	 \'	\\\"cc\" ' dd\\\" '";

    for (int j = 0; j < tests.size(); ++j) {
	cout << endl;
	cout << tests[j] << endl;
	cout << "->" << endl << "(";
	QStringList l = splitQuoted(tests[j], ' ');
	for (int i = 0; i < l.size(); ++i) {
	    if (i > 0) cout << ";";
	    cout << l[i];
	}
	cout << ")" << endl;
    }
}

*/

/* 
   Results:

a b c d
->     
(a;b;c;d)

a "b c" d
->       
(a;b c;d)

a 'b c' d
->       
(a;b c;d)

a "b c\" d"
->         
(a;b c" d) 

a 'b c\' d'
->         
(a;b c' d) 

a "b c' d"
->        
(a;b c' d)

a 'b c" d'
->        
(a;b c" d)

aa 'bb cc" dd'
->            
(aa;bb cc" dd)

a'a 'bb' \"cc" dd\"
->                 
(a'a;bb;"cc";dd")  

  a'a \'         'bb'    '      \"cc" ' dd\" '
->                                            
(a'a;';bb;      "cc" ;dd";)

*/

QStringList
StringBits::split(QString line, QChar separator, bool quoted)
{
    if (quoted) {
        return splitQuoted(line, separator);
    } else {
        return line.split(separator,
                          separator == ' ' ? QString::SkipEmptyParts :
                          QString::KeepEmptyParts);
    }
}