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/* -*- 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"
#include "Debug.h"
using namespace std;
namespace sv {
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, EscapeMode escapeMode)
{
QStringList tokens;
QString tok;
// beg -> at beginning of line
// sep -> just seen a field separator
// unq -> in an unquoted field
// q1 -> in a single-quoted field
// q2 -> in a double-quoted field
enum { beg, sep, unq, q1, q2 } mode = beg;
bool use_doubling = (escapeMode == EscapeDoubling ||
escapeMode == EscapeAny);
bool use_backslash = (escapeMode == EscapeBackslash ||
escapeMode == EscapeAny);
for (int i = 0; i < s.length(); ++i) {
QChar c = s[i];
if (c == '\'') {
switch (mode) {
case beg: case sep: mode = q1; break;
case unq: case q2: tok += c; break;
case q1:
if (use_doubling && i+1 < s.length() && s[i+1] == c) {
tok += c; ++i; break;
} else {
mode = unq; break;
}
}
} else if (c == '"') {
switch (mode) {
case beg: case sep: mode = q2; break;
case unq: case q1: tok += c; break;
case q2:
if (use_doubling && i+1 < s.length() && s[i+1] == c) {
tok += c; ++i; break;
} else {
mode = unq; break;
}
}
} else if (c == separator || (separator == ' ' && c.isSpace())) {
switch (mode) {
case beg: mode = sep; tokens << ""; break;
case sep: if (separator != ' ') tokens << ""; break;
case unq: mode = sep; tokens << tok; tok = ""; break;
case q1: case q2: tok += c; break;
}
} else if (c == '\\' && use_backslash) {
if (++i < s.length()) {
c = s[i];
switch (mode) {
case beg: case sep: mode = unq; tok += c; break;
case unq: case q1: case q2: tok += c; break;
}
}
} else {
switch (mode) {
case beg: case sep: mode = unq; tok += c; break;
case unq: case q1: case q2: tok += c; break;
}
}
}
if (tok != "" || mode != beg) {
if (mode == q1) {
tokens << ("'" + tok); // turns out it wasn't quoted after all
} else if (mode == q2) {
tokens << ("\"" + tok);
} else {
tokens << tok;
}
}
return tokens;
}
QStringList
StringBits::split(QString line, QChar separator, bool quoted)
{
if (quoted) {
return splitQuoted(line, separator);
} else {
return line.split(
separator,
separator == ' ' ?
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
Qt::SkipEmptyParts :
Qt::KeepEmptyParts
#else
QString::SkipEmptyParts :
QString::KeepEmptyParts
#endif
);
}
}
QString
StringBits::joinDelimited(QVector<QString> row, QString delimiter)
{
QString s;
for (auto col: row) {
if (s != "") {
s += delimiter;
}
if (col.contains(delimiter)) {
col.replace("\"", "\"\"");
col = "\"" + col + "\"";
}
s += col;
}
return s;
}
bool
StringBits::isValidUtf8(const std::string &bytes, bool isTruncated)
{
size_t len = bytes.length();
size_t mblen = 0;
unsigned char first = '\0';
for (size_t i = 0; i < len; ++i) {
unsigned char c = bytes[i];
if (((c & 0xc0) == 0xc0) || !(c & 0x80)) {
// 11xxxxxx or 0xxxxxxx: first byte of a character sequence
if (mblen > 0) {
// have we seen a valid sequence?
size_t length =
(!(first & 0x20)) ? 2 :
(!(first & 0x10)) ? 3 :
(!(first & 0x08)) ? 4 :
(!(first & 0x04)) ? 5 : 0;
if (length != 0 && mblen != length) {
// previous multibyte sequence had invalid length
return false;
}
}
mblen = 0;
first = c;
} else {
// second or subsequent byte
if (mblen == 0) {
// ... without a first byte!
return false;
}
}
}
// at the end
if (isTruncated) {
// can't trust any errors arising now
return true;
}
if (mblen > 0) {
// have we seen a valid sequence?
size_t length =
(!(first & 0x20)) ? 2 :
(!(first & 0x10)) ? 3 :
(!(first & 0x08)) ? 4 :
(!(first & 0x04)) ? 5 : 0;
if (length != 0 && mblen != length) {
// final multibyte sequence had invalid length
return false;
}
}
return true;
}
}
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