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// qsamplerUtilities.cpp |
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// |
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/**************************************************************************** |
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Copyright (C) 2004-2007, rncbc aka Rui Nuno Capela. All rights reserved. |
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|
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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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|
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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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|
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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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*****************************************************************************/ |
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|
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#include "qsamplerUtilities.h" |
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|
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#include "qsamplerMainForm.h" |
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|
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#include <stdio.h> |
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#include <qregexp.h> |
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|
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namespace qsamplerUtilities { |
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|
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static int _hexToNumber(char hex_digit) { |
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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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|
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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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|
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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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|
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default: return 0; |
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} |
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} |
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|
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static int _hexsToNumber(char hex_digit0, char hex_digit1) { |
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return _hexToNumber(hex_digit1)*16 + _hexToNumber(hex_digit0); |
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} |
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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() { |
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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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|
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// converts the given file path into a path as expected by LSCP 1.2 |
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QString lscpEscapePath ( const QString& sPath ) |
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{ |
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if (!_remoteSupportsEscapeSequences()) return sPath; |
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|
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QString path(sPath); |
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|
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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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{ |
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QRegExp regexp("%[0-9a-fA-F][0-9a-fA-F]"); |
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for (int i = path.find(regexp); i >= 0; i = path.find(regexp, i + 4)) |
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path.replace(i, 1, "\\x"); |
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} |
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// replace POSIX path escape sequence (%%) by its raw character |
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for (int i = path.find("%%"); i >= 0; i = path.find("%%", ++i)) |
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path.remove(i, 1); |
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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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const char pathSeparator = '/'; |
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QRegExp regexp(QRegExp::escape("\\x") + "[0-9a-fA-F][0-9a-fA-F]"); |
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for (int i = 0; i < int(path.length()); i++) { |
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// first skip all previously added LSCP escape sequences |
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if (path.find(regexp, i) == i) { |
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i += 3; |
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continue; |
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} |
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// now 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.at(i).latin1(); |
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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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!(c == pathSeparator) |
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) { |
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// convert the non-basic character into a LSCP escape sequence |
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char buf[5]; |
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::snprintf(buf, sizeof(buf), "\\x%02x", static_cast<unsigned char>(c)); |
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path.replace(i, 1, buf); |
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i += 3; |
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} |
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} |
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} |
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|
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return path; |
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} |
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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(QString path) { |
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if (!_remoteSupportsEscapeSequences()) return path; |
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|
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// first escape all percent ('%') characters for POSIX |
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for (int i = path.find('%'); i >= 0; i = path.find('%', i+2)) |
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path.replace(i, 1, "%%"); |
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|
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// resolve LSCP hex escape sequences (\xHH) |
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QRegExp regexp(QRegExp::escape("\\x") + "[0-9a-fA-F][0-9a-fA-F]"); |
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for (int i = path.find(regexp); i >= 0; i = path.find(regexp, i + 4)) { |
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const QString sHex = path.mid(i+2, 2).lower(); |
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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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continue; |
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} |
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// all other characters we simply decode |
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char cAscii = _hexsToNumber(sHex.at(1).latin1(), sHex.at(0).latin1()); |
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path.replace(i, 4, cAscii); |
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} |
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|
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return path; |
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} |
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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(QString txt) { |
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if (!_remoteSupportsEscapeSequences()) return txt; |
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|
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// resolve LSCP hex escape sequences (\xHH) |
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QRegExp regexp(QRegExp::escape("\\x") + "[0-9a-fA-F][0-9a-fA-F]"); |
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for (int i = txt.find(regexp); i >= 0; i = txt.find(regexp, i + 4)) { |
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const QString sHex = txt.mid(i+2, 2).lower(); |
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// decode into raw ASCII character |
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char cAscii = _hexsToNumber(sHex.at(1).latin1(), sHex.at(0).latin1()); |
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txt.replace(i, 4, cAscii); |
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} |
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|
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return txt; |
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} |
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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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|
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qsamplerMainForm *pMainForm = qsamplerMainForm::getInstance(); |
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if (pMainForm == NULL) |
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return result; |
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if (pMainForm->client() == NULL) |
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return result; |
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|
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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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|
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return result; |
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} |
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|
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} // namespace qsamplerUtilities |