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// qsamplerUtilities.cpp |
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// |
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/**************************************************************************** |
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Copyright (C) 2004-2020, rncbc aka Rui Nuno Capela. All rights reserved. |
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Copyright (C) 2007, 2008 Christian Schoenebeck |
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This program is free software; you can redistribute it and/or |
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modify it under the terms of the GNU General Public License |
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as published by the Free Software Foundation; either version 2 |
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of the License, or (at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*****************************************************************************/ |
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#include "qsamplerUtilities.h" |
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#include "qsamplerOptions.h" |
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#include "qsamplerMainForm.h" |
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#include <QRegularExpression> |
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using namespace QSampler; |
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namespace qsamplerUtilities { |
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static int _hexToNumber ( char hex_digit ) |
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{ |
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switch (hex_digit) { |
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case '0': return 0; |
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case '1': return 1; |
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case '2': return 2; |
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case '3': return 3; |
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case '4': return 4; |
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case '5': return 5; |
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case '6': return 6; |
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case '7': return 7; |
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case '8': return 8; |
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case '9': return 9; |
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case 'a': return 10; |
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case 'b': return 11; |
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case 'c': return 12; |
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case 'd': return 13; |
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case 'e': return 14; |
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case 'f': return 15; |
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case 'A': return 10; |
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case 'B': return 11; |
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case 'C': return 12; |
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case 'D': return 13; |
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case 'E': return 14; |
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case 'F': return 15; |
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default: return 0; |
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} |
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} |
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static int _hexsToNumber ( char hex0, char hex1 ) |
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{ |
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return _hexToNumber(hex1) * 16 + _hexToNumber(hex0); |
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} |
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static bool _isHex ( char hex_digit ) |
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{ |
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return _hexToNumber ( hex_digit ) || hex_digit == '0'; |
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} |
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// returns true if the connected LSCP server supports escape sequences |
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static bool _remoteSupportsEscapeSequences (void) |
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{ |
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const lscpVersion_t version = getRemoteLscpVersion(); |
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// LSCP v1.2 or younger required |
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return (version.major > 1 || (version.major == 1 && version.minor >= 2)); |
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} |
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// converts the given file path into a path as expected by LSCP 1.2 |
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QByteArray lscpEscapePath ( const QString& sPath ) |
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{ |
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QByteArray path = sPath.toUtf8(); |
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if (!_remoteSupportsEscapeSequences()) return path; |
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const char pathSeparator = '/'; |
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int path_len = path.length(); |
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char buf[5]; |
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// Trying single pass to avoid redundant checks on extra run |
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for ( int i = 0; i < path_len; i++ ) { |
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// translate POSIX escape sequences |
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if (path[i] == '%') { |
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// replace POSIX path escape sequences (%HH) by LSCP escape sequences (\xHH) |
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// TODO: missing code for other systems like Windows |
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if (_isHex(path[i+1]) && _isHex(path[i+2])) { |
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path.replace (i, 1, "\\x"); |
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path_len++; |
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i += 3; |
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continue; |
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} |
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// replace POSIX path escape sequence (%%) by its raw character |
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if (path[i+1] == '%') { |
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path.remove (i, 1); |
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path_len--; |
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continue; |
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} |
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continue; |
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} |
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// replace all non-basic characters by LSCP escape sequences |
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// |
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// match all non-alphanumerics |
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// (we could exclude much more characters here, but that way |
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// we're sure it just works^TM) |
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const char c = path[i]; |
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if ( |
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!(c >= '0' && c <= '9') && |
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!(c >= 'a' && c <= 'z') && |
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!(c >= 'A' && c <= 'Z') && |
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#if defined(__WIN32__) || defined(_WIN32) || defined(WIN32) |
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!(c == ':') && |
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#endif |
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!(c == pathSeparator) |
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) { |
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// convertion |
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::snprintf(buf, sizeof(buf), "\\x%02x", static_cast<unsigned char>(c)); |
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path = path.replace(i, 1, buf); |
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path_len += 3; |
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i += 3; |
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} |
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} |
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return path; |
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} |
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// converts a path returned by a LSCP command (and may contain escape |
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// sequences) into the appropriate POSIX path |
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QString lscpEscapedPathToPosix ( const char* sPath ) |
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{ |
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if (!_remoteSupportsEscapeSequences()) return QString(sPath); |
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QByteArray path(sPath); |
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int path_len = path.length(); |
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char cAscii[2] = "\0"; |
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for ( int i = 0; i < path_len; i++) { |
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// first escape all percent ('%') characters for POSIX |
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if (path[i] == '%') { |
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path.insert(i, '%'); |
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path_len++; |
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i++; |
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continue; |
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} |
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// resolve LSCP hex escape sequences (\xHH) |
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if (path[i] == '\\' && path[i+1] == 'x' && _isHex(path[i+2]) && _isHex(path[i+3])) { |
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const QByteArray sHex = path.mid(i + 2, 2).toLower(); |
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// the slash has to be escaped for POSIX as well |
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if (sHex == "2f") { |
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path.replace(i, 4, "%2f"); |
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// all other characters we simply decode |
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} else { |
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cAscii[0] = _hexsToNumber(sHex[1], sHex[0]); |
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path.replace(i, 4, cAscii); |
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} |
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path_len -= 3; |
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continue; |
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} |
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} |
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return QString(path); |
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} |
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// converts the given text as expected by LSCP 1.2 |
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// (that is by encoding special characters with LSCP escape sequences) |
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QByteArray lscpEscapeText ( const QString& sText ) |
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{ |
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QByteArray text = sText.toUtf8(); |
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if (!_remoteSupportsEscapeSequences()) return text; |
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int text_len = text.length(); |
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char buf[5]; |
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|
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// replace all non-basic characters by LSCP escape sequences |
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for (int i = 0; i < text_len; ++i) { |
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// match all non-alphanumerics |
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// (we could exclude much more characters here, but that way |
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// we're sure it just works^TM) |
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const char c = text[i]; |
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if ( |
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!(c >= '0' && c <= '9') && |
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!(c >= 'a' && c <= 'z') && |
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!(c >= 'A' && c <= 'Z') |
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) { |
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// convert the non-basic character into a LSCP escape sequence |
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::snprintf(buf, sizeof(buf), "\\x%02x", static_cast<unsigned char>(c)); |
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text.replace(i, 1, buf); |
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text_len += 3; |
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i += 3; |
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} |
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} |
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return text; |
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} |
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// converts a text returned by a LSCP command and may contain escape |
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// sequences) into raw text, that is with all escape sequences decoded |
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QString lscpEscapedTextToRaw ( const char* sText ) |
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{ |
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if (!_remoteSupportsEscapeSequences()) return QString(sText); |
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QByteArray text(sText); |
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int text_len = text.length(); |
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char sHex[2], cAscii[2] = "\0"; |
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// resolve LSCP hex escape sequences (\xHH) |
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for (int i = 0; i < text_len; i++) { |
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if (text[i] != '\\' || text[i+1] != 'x') continue; |
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sHex[0] = text[i+2], sHex[1] = text[i+3]; |
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if (_isHex(sHex[0]) && _isHex(sHex[1])) { |
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cAscii[0] = _hexsToNumber(sHex[1], sHex[0]); |
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text.replace(i, 4, cAscii); |
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text_len -= 3; |
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} |
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} |
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return QString(text); |
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} |
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lscpVersion_t getRemoteLscpVersion (void) |
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{ |
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lscpVersion_t result = { 0, 0 }; |
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MainForm* pMainForm = MainForm::getInstance(); |
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if (pMainForm == nullptr) |
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return result; |
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if (pMainForm->client() == nullptr) |
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return result; |
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lscp_server_info_t* pServerInfo = |
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::lscp_get_server_info(pMainForm->client()); |
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if (pServerInfo && pServerInfo->protocol_version) |
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::sscanf(pServerInfo->protocol_version, "%d.%d", |
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&result.major, &result.minor); |
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return result; |
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} |
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} // namespace qsamplerUtilities |
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// end of qsamplerUtilities.cpp |