src/network/lscpparser.h

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 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 "../common/global.h"
#include "../Sampler.h"

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

using namespace LinuxSampler;

/**
 * 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.
};

/**
 * 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;
    };
    std::string                       String;
    std::map<std::string,std::string> KeyValList;
};
#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	schoenebeck	56	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	schoenebeck	35	* *
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	schoenebeck	53	#include "../common/global.h"
35			#include "../Sampler.h"
36	schoenebeck	35
37			/// Will be returned by the parser in case of syntax errors.
38			#define LSCP_SYNTAX_ERROR -69
39
40	schoenebeck	53	using namespace LinuxSampler;
41
42	schoenebeck	35	/**
43			* How the fill states of disk stream buffers should be reflected.
44			*/
45			enum fill_response_t {
46			fill_response_bytes, ///< The returned values are meant in bytes.
47			fill_response_percentage ///< The returned values are meant in percentage.
48			};
49
50			/**
51			* Semantic value of the lookahead symbol.
52			*
53			* Structure that is used by the parser to process and return values from the
54			* input text. The lexical analyzer for example returns a number for
55			* recognized number strings in the input text and the parser might return a
56			* value for each of it's rules.
57			*/
58			struct YYSTYPE {
59			union {
60	schoenebeck	123	char Char;
61			unsigned int Number;
62			double Dotnum;
63			fill_response_t FillResponse;
64	schoenebeck	35	};
65	schoenebeck	123	std::string String;
66			std::map<std::string,std::string> KeyValList;
67	schoenebeck	35	};
68			#define yystype YYSTYPE ///< For backward compatibility.
69			#define YYSTYPE_IS_DECLARED ///< We tell the lexer / parser that we use our own data structure as defined above.
70
71			// just symbol prototyping
72			class LSCPServer;
73
74			// pointer to an (reentrant) scanner / lexical analyzer
75			typedef void* yyscan_t;
76
77			/**
78			* Parameters given to the parser on every yyparse() call.
79			*/
80			struct yyparse_param_t {
81			LSCPServer* pServer;
82			yyscan_t pScanner;
83			};
84			#define YYPARSE_PARAM yyparse_param
85
86			/**
87			* Prototype of the main scanner function (lexical analyzer).
88			*/
89			#define YY_DECL int yylex(YYSTYPE* yylval, yyscan_t yyscanner)
90
91			/**
92			* Override lex's input function which just reads from stdin by default.
93			* We read from a socket instead.
94			*/
95			#define YY_INPUT(buf,result,max_size) \
96			errno=0; \
97			while ( (result = recv(hSession, buf, max_size, 0)) < 0 ) \
98			{ \
99			if(errno != EINTR) \
100			{ \
101			switch(errno) { \
102			case EBADF: \
103			dmsg(2,("LSCPScanner: The argument s is an invalid descriptor.\n")); \
104			break; \
105			case ECONNREFUSED: \
106			dmsg(2,("LSCPScanner: A remote host refused to allow the network connection (typically because it is not running the requested service).\n")); \
107			break; \
108			case ENOTCONN: \
109			dmsg(2,("LSCPScanner: The socket is associated with a connection-oriented protocol and has not been connected (see connect(2) and accept(2)).\n")); \
110			break; \
111			case ENOTSOCK: \
112			dmsg(2,("LSCPScanner: The argument s does not refer to a socket.\n")); \
113			break; \
114			case EAGAIN: \
115			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")); \
116			break; \
117			case EINTR: \
118			dmsg(2,("LSCPScanner: The receive was interrupted by delivery of a signal before any data were available.\n")); \
119			break; \
120			case EFAULT: \
121			dmsg(2,("LSCPScanner: The receive buffer pointer(s) point outside the process's address space.\n")); \
122			break; \
123			case EINVAL: \
124			dmsg(2,("LSCPScanner: Invalid argument passed.\n")); \
125			break; \
126			case ENOMEM: \
127			dmsg(2,("LSCPScanner: Could not allocate memory for recvmsg.\n")); \
128			break; \
129			default: \
130			dmsg(2,("LSCPScanner: Unknown recv() error.\n")); \
131			break; \
132			} \
133			YY_FATAL_ERROR( "input in flex scanner failed" ); \
134			break; \
135			} \
136			errno=0; \
137			clearerr(yyin); \
138			}\
139
140
141			#endif // __LSCPPARSER_H__