src/network/lscpparser.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003 by Benno Senoner and 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                                                   *
 ***************************************************************************/

#ifndef __LSCPPARSER_H__
#define __LSCPPARSER_H__

#include <sys/types.h>
#include <sys/socket.h>

#include <stdlib.h>
#include <iostream>
#include <sstream>
#include <string>

#include "../global.h"

/// Will be returned by the parser in case of syntax errors.
#define LSCP_SYNTAX_ERROR       -69

/**
 * How the fill states of disk stream buffers should be reflected.
 */
enum fill_response_t {
    fill_response_bytes,      ///< The returned values are meant in bytes.
    fill_response_percentage  ///< The returned values are meant in percentage.
};

/**
 * Which audio output system to be used.
 */
enum audio_output_type_t {
    audio_output_type_alsa,
    audio_output_type_jack
};

/**
 * Semantic value of the lookahead symbol.
 *
 * Structure that is used by the parser to process and return values from the
 * input text. The lexical analyzer for example returns a number for
 * recognized number strings in the input text and the parser might return a
 * value for each of it's rules.
 */
struct YYSTYPE {
    union {
        char                Char;
        unsigned int        Number;
        double              Dotnum;
        fill_response_t     FillResponse;
        audio_output_type_t AudioOutput;
    };
    std::string  String;
};
#define yystype YYSTYPE         ///< For backward compatibility.
#define YYSTYPE_IS_DECLARED     ///< We tell the lexer / parser that we use our own data structure as defined above.

// just symbol prototyping
class LSCPServer;

// pointer to an (reentrant) scanner / lexical analyzer
typedef void* yyscan_t;

/**
 * Parameters given to the parser on every yyparse() call.
 */
struct yyparse_param_t {
    LSCPServer* pServer;
    yyscan_t    pScanner;
};
#define YYPARSE_PARAM yyparse_param

/**
 * Prototype of the main scanner function (lexical analyzer).
 */
#define YY_DECL int yylex(YYSTYPE* yylval, yyscan_t yyscanner)

/**
 * Override lex's input function which just reads from stdin by default.
 * We read from a socket instead.
 */
#define YY_INPUT(buf,result,max_size) \
        errno=0; \
        while ( (result = recv(hSession, buf, max_size, 0)) < 0 ) \
        { \
                if(errno != EINTR) \
                { \
                        switch(errno) { \
                                case EBADF: \
                                        dmsg(2,("LSCPScanner: The argument s is an invalid descriptor.\n")); \
                                        break; \
                                case ECONNREFUSED: \
                                        dmsg(2,("LSCPScanner: A remote host refused to allow the network connection (typically because it is not running the requested service).\n")); \
                                        break; \
                                case ENOTCONN: \
                                        dmsg(2,("LSCPScanner: The socket is associated with a connection-oriented protocol and has not been connected (see connect(2) and accept(2)).\n")); \
                                        break; \
                                case ENOTSOCK: \
                                        dmsg(2,("LSCPScanner: The argument s does not refer to a socket.\n")); \
                                        break; \
                                case EAGAIN: \
                                        dmsg(2,("LSCPScanner: The socket is marked non-blocking and the receive operation would block, or a receive timeout had been set and the timeout expired before data was received.\n")); \
                                        break; \
                                case EINTR: \
                                        dmsg(2,("LSCPScanner: The receive was interrupted by delivery of a signal before any data were available.\n")); \
                                        break; \
                                case EFAULT: \
                                        dmsg(2,("LSCPScanner: The receive buffer pointer(s) point outside the process's address space.\n")); \
                                        break; \
                                case EINVAL: \
                                        dmsg(2,("LSCPScanner: Invalid argument passed.\n")); \
                                        break; \
                                case ENOMEM: \
                                        dmsg(2,("LSCPScanner: Could not allocate memory for recvmsg.\n")); \
                                        break; \
                                default: \
                                        dmsg(2,("LSCPScanner: Unknown recv() error.\n")); \
                                        break; \
                        } \
                        YY_FATAL_ERROR( "input in flex scanner failed" ); \
                        break; \
                } \
                errno=0; \
                clearerr(yyin); \
        }\


#endif // __LSCPPARSER_H__
1	schoenebeck	35	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck *
6			* *
7			* This program is free software; you can redistribute it and/or modify *
8			* it under the terms of the GNU General Public License as published by *
9			* the Free Software Foundation; either version 2 of the License, or *
10			* (at your option) any later version. *
11			* *
12			* This program is distributed in the hope that it will be useful, *
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15			* GNU General Public License for more details. *
16			* *
17			* You should have received a copy of the GNU General Public License *
18			* along with this program; if not, write to the Free Software *
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20			* MA 02111-1307 USA *
21			***************************************************************************/
22
23			#ifndef __LSCPPARSER_H__
24			#define __LSCPPARSER_H__
25
26			#include <sys/types.h>
27			#include <sys/socket.h>
28
29			#include <stdlib.h>
30			#include <iostream>
31			#include <sstream>
32			#include <string>
33
34			#include "../global.h"
35
36			/// Will be returned by the parser in case of syntax errors.
37			#define LSCP_SYNTAX_ERROR -69
38
39			/**
40			* How the fill states of disk stream buffers should be reflected.
41			*/
42			enum fill_response_t {
43			fill_response_bytes, ///< The returned values are meant in bytes.
44			fill_response_percentage ///< The returned values are meant in percentage.
45			};
46
47			/**
48			* Which audio output system to be used.
49			*/
50			enum audio_output_type_t {
51			audio_output_type_alsa,
52			audio_output_type_jack
53			};
54
55			/**
56			* Semantic value of the lookahead symbol.
57			*
58			* Structure that is used by the parser to process and return values from the
59			* input text. The lexical analyzer for example returns a number for
60			* recognized number strings in the input text and the parser might return a
61			* value for each of it's rules.
62			*/
63			struct YYSTYPE {
64			union {
65			char Char;
66			unsigned int Number;
67			double Dotnum;
68			fill_response_t FillResponse;
69			audio_output_type_t AudioOutput;
70			};
71			std::string String;
72			};
73			#define yystype YYSTYPE ///< For backward compatibility.
74			#define YYSTYPE_IS_DECLARED ///< We tell the lexer / parser that we use our own data structure as defined above.
75
76			// just symbol prototyping
77			class LSCPServer;
78
79			// pointer to an (reentrant) scanner / lexical analyzer
80			typedef void* yyscan_t;
81
82			/**
83			* Parameters given to the parser on every yyparse() call.
84			*/
85			struct yyparse_param_t {
86			LSCPServer* pServer;
87			yyscan_t pScanner;
88			};
89			#define YYPARSE_PARAM yyparse_param
90
91			/**
92			* Prototype of the main scanner function (lexical analyzer).
93			*/
94			#define YY_DECL int yylex(YYSTYPE* yylval, yyscan_t yyscanner)
95
96			/**
97			* Override lex's input function which just reads from stdin by default.
98			* We read from a socket instead.
99			*/
100			#define YY_INPUT(buf,result,max_size) \
101			errno=0; \
102			while ( (result = recv(hSession, buf, max_size, 0)) < 0 ) \
103			{ \
104			if(errno != EINTR) \
105			{ \
106			switch(errno) { \
107			case EBADF: \
108			dmsg(2,("LSCPScanner: The argument s is an invalid descriptor.\n")); \
109			break; \
110			case ECONNREFUSED: \
111			dmsg(2,("LSCPScanner: A remote host refused to allow the network connection (typically because it is not running the requested service).\n")); \
112			break; \
113			case ENOTCONN: \
114			dmsg(2,("LSCPScanner: The socket is associated with a connection-oriented protocol and has not been connected (see connect(2) and accept(2)).\n")); \
115			break; \
116			case ENOTSOCK: \
117			dmsg(2,("LSCPScanner: The argument s does not refer to a socket.\n")); \
118			break; \
119			case EAGAIN: \
120			dmsg(2,("LSCPScanner: The socket is marked non-blocking and the receive operation would block, or a receive timeout had been set and the timeout expired before data was received.\n")); \
121			break; \
122			case EINTR: \
123			dmsg(2,("LSCPScanner: The receive was interrupted by delivery of a signal before any data were available.\n")); \
124			break; \
125			case EFAULT: \
126			dmsg(2,("LSCPScanner: The receive buffer pointer(s) point outside the process's address space.\n")); \
127			break; \
128			case EINVAL: \
129			dmsg(2,("LSCPScanner: Invalid argument passed.\n")); \
130			break; \
131			case ENOMEM: \
132			dmsg(2,("LSCPScanner: Could not allocate memory for recvmsg.\n")); \
133			break; \
134			default: \
135			dmsg(2,("LSCPScanner: Unknown recv() error.\n")); \
136			break; \
137			} \
138			YY_FATAL_ERROR( "input in flex scanner failed" ); \
139			break; \
140			} \
141			errno=0; \
142			clearerr(yyin); \
143			}\
144
145
146			#endif // __LSCPPARSER_H__