1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
$Id: toclexer.c,v 1.2 2008/03/23 17:21:34 karl Exp $
Copyright (C) 2005, 2008 Rocky Bernstein <rocky@gnu.org>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
/* Lexical scanner for cdrdao's TOC. */
#include "toclexer.h"
#include "toc.tab.h"
#include <ctype.h>
#define YYEOF 0
/* A structure for associating a word with a token. */
typedef struct keyword_s
{
char const *psz_keyword;
token_t i_token;
} keyword_t;
/* These are all of the words that might appear in a TOC file and
the token association that the parser will use.
*/
const keyword_t keywords[] =
{
{"ARRANGER", ARRANGER},
{"AUDIO", AUDIO},
{"AUDIOFILE", AUDIOFILE},
{"CATALOG", CATALOG},
{"CD_DA", CD_DA},
{"CD_I", CD_I},
{"CD_ROM", CD_ROM},
{"CD_ROM_XA", CD_ROM_XA},
{"CD_TEXT", CD_TEXT},
{"COMPOSER", COMPOSER},
{"COPY", COPY},
{"DATAFILE", DATAFILE},
{"DISC_ID", DISC_ID},
{"EN", EN},
{"END", END},
{"FIFO", FIFO},
{"FILE", FILE_TOKEN},
{"FOUR_CHANNEL_AUDIO", FOUR_CHANNEL_AUDIO},
{"GENRE", GENRE},
{"INDEX", INDEX},
{"ISRC", ISRC},
{"LANGUAGE", LANGUAGE},
{"LANGUAGE_MAP", LANGUAGE_MAP},
{"MESSAGE", MESSAGE},
{"MODE0", MODE0},
{"MODE1", MODE1},
{"MODE1_RAW", MODE1_RAW},
{"MODE2", MODE2},
{"MODE2_FORM1", MODE2_FORM1},
{"MODE2_FORM2", MODE2_FORM2},
{"MODE2_FORM_MIX", MODE2_FORM_MIX},
{"MODE2_RAW", MODE2_RAW},
{"NO", NO},
{"PERFORMER", PERFORMER},
{"PREGAP", PREGAP},
{"PRE_EMPHASIS", PRE_EMPHASIS},
{"RESERVED1", RESERVED1},
{"RESERVED2", RESERVED2},
{"RESERVED3", RESERVED3},
{"RESERVED4", RESERVED4},
{"RW", RW},
{"RW_RAW", RW_RAW},
{"SILENCE", SILENCE},
{"SIZE_INFO", SIZE_INFO},
{"SONGWRITER", SONGWRITER},
{"START", START},
{"SWAP", SWAP},
{"TITLE", TITLE},
{"TOC_INFO1", TOC_INFO1},
{"TOC_INFO2", TOC_INFO2},
{"TRACK", TRACK},
{"TWO_CHANNEL_AUDIO", TWO_CHANNEL_AUDIO},
{"UPC_EAN", UPC_EAN},
{"ZERO", ZERO},
{0, 0}
};
static int
compare_keyword(const void *p_id, const void *p_keyword) {
char *psz_id = (char *) p_id;
char const *psz_keyword = ((keyword_t *) p_keyword)->psz_keyword;
return strcmp(psz_id, psz_keyword);
}
token_t
toclex (void)
{
int c;
start:
/* Skip white space. */
while ( isspace(c = fgetc (toc_in)) )
;
/* Process a number. */
if (isdigit (c))
{
ungetc (c, toc_in);
fscanf (toc_in, "%lu", &(toclval.val));
return Integer;
}
/* Process a comment. */
if ( '/' == c ) {
if ('/' == (c = fgetc (toc_in)) ) {
while ((c = fgetc (toc_in)) != EOF && c != '\n')
;
/* Return end-of-input. */
if (EOF == c) return YYEOF;
goto start;
}
/* Not a comment. So put back the character after the '/' and
return '/' */
ungetc (c, toc_in);
return '/';
}
/* Char starts an identifier => read the name. */
if (isalpha (c))
{
static char symbol[50] = "";
unsigned int i;
i = 0;
do
{
/* Add this character to the buffer. */
symbol[i++] = c;
/* Get another character. */
c = fgetc (toc_in);
}
while (isgraph (c));
ungetc (c, toc_in);
symbol[i] = '\0';
toclval.psz_str = symbol;
{
keyword_t *p_keyword;
p_keyword = bsearch(symbol, keywords,
(sizeof(keywords) / sizeof(keyword_t)) - 1,
sizeof(keyword_t), compare_keyword);
if (!p_keyword) return Id;
return p_keyword->i_token;
}
}
/* Process a string.
To do: save the value of the string and process octal numbers.
*/
if ( '"' == c ) {
int b_backslash = 0;
while ( EOF != (c = fgetc (toc_in))
&& (b_backslash || '"' != c ) ) {
b_backslash = ('\\' == c );
}
/* Return end-of-input. */
if (EOF == c) return YYEOF;
return String;
}
/* Return end-of-input. */
if (EOF == c) return YYEOF;
switch (c) {
case ':': return Colon;
case '{': return LeftBrace;
case '}': return RightBrace;
default:
/* Return a single char. */
return c;
}
}
|
