src/network/lscpresultset.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2007 Christian Schoenebeck                       *
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

/*********************************************************
 * This class helps to constuct valid resultsets per
 * LSCP protocol specification
 *
 * Valid results include:
 * OK - to ack the request
 * Single line to ack the requests and give status
 * Several lines of information in the following format:
 * LABEL0: VALUE0
 * LABEL1: VALUE1
 * VALELx: VALUEx
 * .
 *
 * ******************************************************/

#include "lscpresultset.h"
#include <iomanip>
#include "../common/global_private.h"

//Construct an empty resultset
//Default index is -1 meaning the resultset doesn't have an index
LSCPResultSet::LSCPResultSet(int index) {
        result_index = index;
        count = 0;
        storage = "";
        result_type = result_type_success;
}

//Construct a resultset with a single line
//Default index is -1 meaning the resultset doesn't have an index
LSCPResultSet::LSCPResultSet(String Value, int index) {
        result_index = index;
        count = 1;
        storage = Value + "\r\n";
        result_type = result_type_success;
}

//Add a label/value pair to the resultset
//Values could be of different types for now supports String, int and float.
void LSCPResultSet::Add(String Label, String Value) {
        if (count == -1)
                throw Exception("Attempting to change already produced resultset");
        if (result_type != result_type_success)
                throw Exception("Attempting to create illegal resultset");
        storage = storage + Label + ": " + Value + "\r\n";
        count = 2; // results in form of "Label: Value" should always be handled as multi line responses
}

void LSCPResultSet::Add(String Label, const char* pValue) {
    Add(Label, String(pValue));
}

//Add SQL resultset row
void LSCPResultSet::Add(int columns, char** argv) {
        for (int i = 0; i < columns; i++)
        {
                storage += argv[i];
                if ((i+1) < columns)
                        storage += "|";
        }
        storage += "\r\n";
        count = 2; //This result is always multiline.
}

void LSCPResultSet::Add(int Value) {
        Add(ToString(Value));
}

void LSCPResultSet::Add(String Label, int Value) {
        Add(Label, ToString(Value));
}

void LSCPResultSet::Add(String Label, float Value) {
    std::stringstream ss;
    ss.imbue(std::locale::classic());
    ss << std::fixed << std::setprecision(3) << Value;
    Add(Label, ss.str());
}

void LSCPResultSet::Add(String Label, bool Value) {
    String s = (Value) ? "true" : "false";
    Add(Label, s);
}

//Add a single string to the resultset
void LSCPResultSet::Add(String Value) {
        if (result_type != result_type_success)
                throw Exception("Attempting to create illegal resultset");
        if (count == -1)
                throw Exception("Attempting to change already produced resultset");
        if (count != 0)
                throw Exception("Attempting to create illegal resultset");
        storage = Value + "\r\n";
        count = 1;
}

//Generate an error result set from an exception.
//Per LSCP spec, error result is a sinle line in the following format:
//ERR:<CODE>:Message text\r\n
//This method will be used to generate unknown errors only (code 0)
//To generate errors with other codes as well as warnings use other methods (below).
//Because this is an unknown error, this method will also print message to the stderr.
void LSCPResultSet::Error(Exception e) {
        e.PrintMessage();
        Error(e.Message());
}

//This will construct an error with a string and error code
//code has a default of 0
//String has a default of "Undefined Error"
void LSCPResultSet::Error (String message, int code) {
        //Even though this is must be a single line resultset we won't throw
        //anything here because this is already part of exception handling.
        //We'll just 'forget' all previous results (if any) from this resultset.
        result_type = result_type_error;
        storage = "ERR:" + ToString(code) + ":" + message + "\r\n";
        count = 1;
}

//This will construct a warning with a string and error code
//code has a default of 0
//String has a default of "Undefined Error"
void LSCPResultSet::Warning (String message, int code) {
        //FIXME: DO we want warnings as part of the resultset or
        //do we want them to work like errors??? For now, make them work like errors.
        result_type = result_type_warning;
        if (result_index == -1)
                storage = "WRN:" + ToString(code) + ":" + message + "\r\n";
        else
                storage = "WRN[" + ToString(result_index) + "]:" + ToString(code) + ":" + message + "\r\n";
        count = 1;
}

//Produce resultset
String LSCPResultSet::Produce(void) {
        //FIXME: I'm assuming that only a sinle like "OK" can have index
        if (count == 0) //When there is nothing in the resultset we just send "OK" to ack the request
                if (result_index == -1)
                        return "OK\r\n";
                else
                        return "OK[" + ToString(result_index) + "]\r\n";
        if (count == 1) //Single line results are just that, single line
                return storage;
        //Multiline results MUST end with a line with a single dot
        return storage + ".\r\n";
}
1	senkov	113	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	1009	* Copyright (C) 2005 - 2007 Christian Schoenebeck *
7	senkov	113	* *
8			* This program is free software; you can redistribute it and/or modify *
9			* it under the terms of the GNU General Public License as published by *
10			* the Free Software Foundation; either version 2 of the License, or *
11			* (at your option) any later version. *
12			* *
13			* This program is distributed in the hope that it will be useful, *
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16			* GNU General Public License for more details. *
17			* *
18			* You should have received a copy of the GNU General Public License *
19			* along with this program; if not, write to the Free Software *
20			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21			* MA 02111-1307 USA *
22			***************************************************************************/
23
24	senkov	116	/*********************************************************
25			* This class helps to constuct valid resultsets per
26			* LSCP protocol specification
27			*
28			* Valid results include:
29			* OK - to ack the request
30			* Single line to ack the requests and give status
31			* Several lines of information in the following format:
32			* LABEL0: VALUE0
33			* LABEL1: VALUE1
34			* VALELx: VALUEx
35			* .
36			*
37			* ******************************************************/
38
39	senkov	113	#include "lscpresultset.h"
40	persson	1349	#include <iomanip>
41	schoenebeck	1424	#include "../common/global_private.h"
42	senkov	113
43	senkov	116	//Construct an empty resultset
44	senkov	120	//Default index is -1 meaning the resultset doesn't have an index
45			LSCPResultSet::LSCPResultSet(int index) {
46			result_index = index;
47	senkov	113	count = 0;
48			storage = "";
49	senkov	120	result_type = result_type_success;
50	senkov	113	}
51
52	senkov	116	//Construct a resultset with a single line
53	senkov	120	//Default index is -1 meaning the resultset doesn't have an index
54			LSCPResultSet::LSCPResultSet(String Value, int index) {
55			result_index = index;
56	senkov	113	count = 1;
57			storage = Value + "\r\n";
58	senkov	120	result_type = result_type_success;
59	senkov	113	}
60
61	senkov	116	//Add a label/value pair to the resultset
62			//Values could be of different types for now supports String, int and float.
63	senkov	113	void LSCPResultSet::Add(String Label, String Value) {
64			if (count == -1)
65	schoenebeck	880	throw Exception("Attempting to change already produced resultset");
66	senkov	120	if (result_type != result_type_success)
67	schoenebeck	880	throw Exception("Attempting to create illegal resultset");
68	senkov	113	storage = storage + Label + ": " + Value + "\r\n";
69	schoenebeck	1009	count = 2; // results in form of "Label: Value" should always be handled as multi line responses
70	senkov	113	}
71
72	schoenebeck	225	void LSCPResultSet::Add(String Label, const char* pValue) {
73			Add(Label, String(pValue));
74			}
75
76	senkov	397	//Add SQL resultset row
77			void LSCPResultSet::Add(int columns, char** argv) {
78			for (int i = 0; i < columns; i++)
79			{
80			storage += argv[i];
81			if ((i+1) < columns)
82			storage += "\|";
83			}
84			storage += "\r\n";
85			count = 2; //This result is always multiline.
86			}
87
88	senkov	120	void LSCPResultSet::Add(int Value) {
89			Add(ToString(Value));
90			}
91
92	senkov	113	void LSCPResultSet::Add(String Label, int Value) {
93	senkov	120	Add(Label, ToString(Value));
94	senkov	113	}
95
96			void LSCPResultSet::Add(String Label, float Value) {
97	persson	1349	std::stringstream ss;
98			ss.imbue(std::locale::classic());
99			ss << std::fixed << std::setprecision(3) << Value;
100			Add(Label, ss.str());
101	senkov	113	}
102
103	schoenebeck	223	void LSCPResultSet::Add(String Label, bool Value) {
104			String s = (Value) ? "true" : "false";
105			Add(Label, s);
106			}
107
108	senkov	116	//Add a single string to the resultset
109	senkov	113	void LSCPResultSet::Add(String Value) {
110	senkov	120	if (result_type != result_type_success)
111	schoenebeck	880	throw Exception("Attempting to create illegal resultset");
112	senkov	113	if (count == -1)
113	schoenebeck	880	throw Exception("Attempting to change already produced resultset");
114	senkov	113	if (count != 0)
115	schoenebeck	880	throw Exception("Attempting to create illegal resultset");
116	senkov	113	storage = Value + "\r\n";
117			count = 1;
118			}
119
120	senkov	120	//Generate an error result set from an exception.
121			//Per LSCP spec, error result is a sinle line in the following format:
122			//ERR:<CODE>:Message text\r\n
123			//This method will be used to generate unknown errors only (code 0)
124			//To generate errors with other codes as well as warnings use other methods (below).
125			//Because this is an unknown error, this method will also print message to the stderr.
126	schoenebeck	880	void LSCPResultSet::Error(Exception e) {
127	senkov	120	e.PrintMessage();
128			Error(e.Message());
129			}
130
131			//This will construct an error with a string and error code
132			//code has a default of 0
133			//String has a default of "Undefined Error"
134			void LSCPResultSet::Error (String message, int code) {
135			//Even though this is must be a single line resultset we won't throw
136			//anything here because this is already part of exception handling.
137			//We'll just 'forget' all previous results (if any) from this resultset.
138			result_type = result_type_error;
139			storage = "ERR:" + ToString(code) + ":" + message + "\r\n";
140			count = 1;
141			}
142
143			//This will construct a warning with a string and error code
144			//code has a default of 0
145			//String has a default of "Undefined Error"
146			void LSCPResultSet::Warning (String message, int code) {
147			//FIXME: DO we want warnings as part of the resultset or
148			//do we want them to work like errors??? For now, make them work like errors.
149			result_type = result_type_warning;
150			if (result_index == -1)
151			storage = "WRN:" + ToString(code) + ":" + message + "\r\n";
152			else
153			storage = "WRN[" + ToString(result_index) + "]:" + ToString(code) + ":" + message + "\r\n";
154			count = 1;
155			}
156
157	senkov	116	//Produce resultset
158	senkov	113	String LSCPResultSet::Produce(void) {
159	senkov	120	//FIXME: I'm assuming that only a sinle like "OK" can have index
160	senkov	116	if (count == 0) //When there is nothing in the resultset we just send "OK" to ack the request
161	senkov	120	if (result_index == -1)
162			return "OK\r\n";
163			else
164			return "OK[" + ToString(result_index) + "]\r\n";
165	senkov	116	if (count == 1) //Single line results are just that, single line
166	senkov	113	return storage;
167	senkov	116	//Multiline results MUST end with a line with a single dot
168	senkov	113	return storage + ".\r\n";
169			}