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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
|
/* GLIB - Library of useful routines for C programming
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef __G_SCANNER_H__
#define __G_SCANNER_H__
#include <glib/ghash.h>
G_BEGIN_DECLS
typedef struct _GScanner GScanner;
typedef struct _GScannerConfig GScannerConfig;
typedef union _GTokenValue GTokenValue;
typedef void (*GScannerMsgFunc) (GScanner *scanner,
gchar *message,
gint error);
/* GScanner: Flexible lexical scanner for general purpose.
*/
/* Character sets */
#define G_CSET_A_2_Z "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define G_CSET_a_2_z "abcdefghijklmnopqrstuvwxyz"
#define G_CSET_DIGITS "0123456789"
#define G_CSET_LATINC "\300\301\302\303\304\305\306"\
"\307\310\311\312\313\314\315\316\317\320"\
"\321\322\323\324\325\326"\
"\330\331\332\333\334\335\336"
#define G_CSET_LATINS "\337\340\341\342\343\344\345\346"\
"\347\350\351\352\353\354\355\356\357\360"\
"\361\362\363\364\365\366"\
"\370\371\372\373\374\375\376\377"
/* Error types */
typedef enum
{
G_ERR_UNKNOWN,
G_ERR_UNEXP_EOF,
G_ERR_UNEXP_EOF_IN_STRING,
G_ERR_UNEXP_EOF_IN_COMMENT,
G_ERR_NON_DIGIT_IN_CONST,
G_ERR_DIGIT_RADIX,
G_ERR_FLOAT_RADIX,
G_ERR_FLOAT_MALFORMED
} GErrorType;
/* Token types */
typedef enum
{
G_TOKEN_EOF = 0,
G_TOKEN_LEFT_PAREN = '(',
G_TOKEN_RIGHT_PAREN = ')',
G_TOKEN_LEFT_CURLY = '{',
G_TOKEN_RIGHT_CURLY = '}',
G_TOKEN_LEFT_BRACE = '[',
G_TOKEN_RIGHT_BRACE = ']',
G_TOKEN_EQUAL_SIGN = '=',
G_TOKEN_COMMA = ',',
G_TOKEN_NONE = 256,
G_TOKEN_ERROR,
G_TOKEN_CHAR,
G_TOKEN_BINARY,
G_TOKEN_OCTAL,
G_TOKEN_INT,
G_TOKEN_HEX,
G_TOKEN_FLOAT,
G_TOKEN_STRING,
G_TOKEN_SYMBOL,
G_TOKEN_IDENTIFIER,
G_TOKEN_IDENTIFIER_NULL,
G_TOKEN_COMMENT_SINGLE,
G_TOKEN_COMMENT_MULTI,
G_TOKEN_LAST
} GTokenType;
union _GTokenValue
{
gpointer v_symbol;
gchar *v_identifier;
gulong v_binary;
gulong v_octal;
gulong v_int;
gdouble v_float;
gulong v_hex;
gchar *v_string;
gchar *v_comment;
guchar v_char;
guint v_error;
};
struct _GScannerConfig
{
/* Character sets
*/
gchar *cset_skip_characters; /* default: " \t\n" */
gchar *cset_identifier_first;
gchar *cset_identifier_nth;
gchar *cpair_comment_single; /* default: "#\n" */
/* Should symbol lookup work case sensitive?
*/
guint case_sensitive : 1;
/* Boolean values to be adjusted "on the fly"
* to configure scanning behaviour.
*/
guint skip_comment_multi : 1; /* C like comment */
guint skip_comment_single : 1; /* single line comment */
guint scan_comment_multi : 1; /* scan multi line comments? */
guint scan_identifier : 1;
guint scan_identifier_1char : 1;
guint scan_identifier_NULL : 1;
guint scan_symbols : 1;
guint scan_binary : 1;
guint scan_octal : 1;
guint scan_float : 1;
guint scan_hex : 1; /* `0x0ff0' */
guint scan_hex_dollar : 1; /* `$0ff0' */
guint scan_string_sq : 1; /* string: 'anything' */
guint scan_string_dq : 1; /* string: "\\-escapes!\n" */
guint numbers_2_int : 1; /* bin, octal, hex => int */
guint int_2_float : 1; /* int => G_TOKEN_FLOAT? */
guint identifier_2_string : 1;
guint char_2_token : 1; /* return G_TOKEN_CHAR? */
guint symbol_2_token : 1;
guint scope_0_fallback : 1; /* try scope 0 on lookups? */
};
struct _GScanner
{
/* unused fields */
gpointer user_data;
guint max_parse_errors;
/* g_scanner_error() increments this field */
guint parse_errors;
/* name of input stream, featured by the default message handler */
const gchar *input_name;
/* quarked data */
GData *qdata;
/* link into the scanner configuration */
GScannerConfig *config;
/* fields filled in after g_scanner_get_next_token() */
GTokenType token;
GTokenValue value;
guint line;
guint position;
/* fields filled in after g_scanner_peek_next_token() */
GTokenType next_token;
GTokenValue next_value;
guint next_line;
guint next_position;
/* to be considered private */
GHashTable *symbol_table;
gint input_fd;
const gchar *text;
const gchar *text_end;
gchar *buffer;
guint scope_id;
/* handler function for _warn and _error */
GScannerMsgFunc msg_handler;
};
GScanner* g_scanner_new (const GScannerConfig *config_templ);
void g_scanner_destroy (GScanner *scanner);
void g_scanner_input_file (GScanner *scanner,
gint input_fd);
void g_scanner_sync_file_offset (GScanner *scanner);
void g_scanner_input_text (GScanner *scanner,
const gchar *text,
guint text_len);
GTokenType g_scanner_get_next_token (GScanner *scanner);
GTokenType g_scanner_peek_next_token (GScanner *scanner);
GTokenType g_scanner_cur_token (GScanner *scanner);
GTokenValue g_scanner_cur_value (GScanner *scanner);
guint g_scanner_cur_line (GScanner *scanner);
guint g_scanner_cur_position (GScanner *scanner);
gboolean g_scanner_eof (GScanner *scanner);
guint g_scanner_set_scope (GScanner *scanner,
guint scope_id);
void g_scanner_scope_add_symbol (GScanner *scanner,
guint scope_id,
const gchar *symbol,
gpointer value);
void g_scanner_scope_remove_symbol (GScanner *scanner,
guint scope_id,
const gchar *symbol);
gpointer g_scanner_scope_lookup_symbol (GScanner *scanner,
guint scope_id,
const gchar *symbol);
void g_scanner_scope_foreach_symbol (GScanner *scanner,
guint scope_id,
GHFunc func,
gpointer user_data);
gpointer g_scanner_lookup_symbol (GScanner *scanner,
const gchar *symbol);
void g_scanner_unexp_token (GScanner *scanner,
GTokenType expected_token,
const gchar *identifier_spec,
const gchar *symbol_spec,
const gchar *symbol_name,
const gchar *message,
gint is_error);
void g_scanner_error (GScanner *scanner,
const gchar *format,
...) G_GNUC_PRINTF (2,3);
void g_scanner_warn (GScanner *scanner,
const gchar *format,
...) G_GNUC_PRINTF (2,3);
gint g_scanner_stat_mode (const gchar *filename);
/* keep downward source compatibility */
#define g_scanner_add_symbol( scanner, symbol, value ) G_STMT_START { \
g_scanner_scope_add_symbol ((scanner), 0, (symbol), (value)); \
} G_STMT_END
#define g_scanner_remove_symbol( scanner, symbol ) G_STMT_START { \
g_scanner_scope_remove_symbol ((scanner), 0, (symbol)); \
} G_STMT_END
#define g_scanner_foreach_symbol( scanner, func, data ) G_STMT_START { \
g_scanner_scope_foreach_symbol ((scanner), 0, (func), (data)); \
} G_STMT_END
#ifndef G_DISABLE_DEPRECATED
/* The following two functions are deprecated and will be removed in
* the next major release. They do no good. */
#define g_scanner_freeze_symbol_table(scanner) ((void)0)
#define g_scanner_thaw_symbol_table(scanner) ((void)0)
#endif /* G_DISABLE_DEPRECATED */
G_END_DECLS
#endif /* __G_SCANNER_H__ */
|
