/[svn]/linuxsampler/trunk/src/network/lscpparser.h
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Annotation of /linuxsampler/trunk/src/network/lscpparser.h

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Revision 135 - (hide annotations) (download) (as text)
Sun Jun 20 16:01:50 2004 UTC (19 years, 9 months ago) by senkov
File MIME type: text/x-c++hdr
File size: 5460 byte(s)
* Update parser to comply with the latest spec

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 senkov 135 * Event types
52     */
53     enum event_t {
54     event_channels,
55     event_voice_count,
56     event_stream_count,
57     event_channel_buffer_fill,
58     event_channel_info,
59     event_misc
60     };
61    
62     /**
63 schoenebeck 35 * Semantic value of the lookahead symbol.
64     *
65     * Structure that is used by the parser to process and return values from the
66     * input text. The lexical analyzer for example returns a number for
67     * recognized number strings in the input text and the parser might return a
68     * value for each of it's rules.
69     */
70     struct YYSTYPE {
71     union {
72 schoenebeck 123 char Char;
73     unsigned int Number;
74     double Dotnum;
75     fill_response_t FillResponse;
76 senkov 135 event_t Event;
77 schoenebeck 35 };
78 schoenebeck 123 std::string String;
79     std::map<std::string,std::string> KeyValList;
80 schoenebeck 35 };
81     #define yystype YYSTYPE ///< For backward compatibility.
82     #define YYSTYPE_IS_DECLARED ///< We tell the lexer / parser that we use our own data structure as defined above.
83    
84     // just symbol prototyping
85     class LSCPServer;
86    
87     // pointer to an (reentrant) scanner / lexical analyzer
88     typedef void* yyscan_t;
89    
90     /**
91     * Parameters given to the parser on every yyparse() call.
92     */
93     struct yyparse_param_t {
94     LSCPServer* pServer;
95     yyscan_t pScanner;
96     };
97     #define YYPARSE_PARAM yyparse_param
98    
99     /**
100     * Prototype of the main scanner function (lexical analyzer).
101     */
102     #define YY_DECL int yylex(YYSTYPE* yylval, yyscan_t yyscanner)
103    
104     /**
105     * Override lex's input function which just reads from stdin by default.
106     * We read from a socket instead.
107     */
108     #define YY_INPUT(buf,result,max_size) \
109     errno=0; \
110     while ( (result = recv(hSession, buf, max_size, 0)) < 0 ) \
111     { \
112     if(errno != EINTR) \
113     { \
114     switch(errno) { \
115     case EBADF: \
116     dmsg(2,("LSCPScanner: The argument s is an invalid descriptor.\n")); \
117     break; \
118     case ECONNREFUSED: \
119     dmsg(2,("LSCPScanner: A remote host refused to allow the network connection (typically because it is not running the requested service).\n")); \
120     break; \
121     case ENOTCONN: \
122     dmsg(2,("LSCPScanner: The socket is associated with a connection-oriented protocol and has not been connected (see connect(2) and accept(2)).\n")); \
123     break; \
124     case ENOTSOCK: \
125     dmsg(2,("LSCPScanner: The argument s does not refer to a socket.\n")); \
126     break; \
127     case EAGAIN: \
128     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")); \
129     break; \
130     case EINTR: \
131     dmsg(2,("LSCPScanner: The receive was interrupted by delivery of a signal before any data were available.\n")); \
132     break; \
133     case EFAULT: \
134     dmsg(2,("LSCPScanner: The receive buffer pointer(s) point outside the process's address space.\n")); \
135     break; \
136     case EINVAL: \
137     dmsg(2,("LSCPScanner: Invalid argument passed.\n")); \
138     break; \
139     case ENOMEM: \
140     dmsg(2,("LSCPScanner: Could not allocate memory for recvmsg.\n")); \
141     break; \
142     default: \
143     dmsg(2,("LSCPScanner: Unknown recv() error.\n")); \
144     break; \
145     } \
146     YY_FATAL_ERROR( "input in flex scanner failed" ); \
147     break; \
148     } \
149     errno=0; \
150     clearerr(yyin); \
151     }\
152    
153    
154     #endif // __LSCPPARSER_H__

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