glib/gscanner.h

   1 /* GLIB - Library of useful routines for C programming
   2  * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 /*
  19  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  20  * file for a list of people on the GLib Team.  See the ChangeLog
  21  * files for a list of changes.  These files are distributed with
  22  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  23  */
  24
  25 #ifndef __G_SCANNER_H__
  26 #define __G_SCANNER_H__
  27
  28 #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  29 #error "Only <glib.h> can be included directly."
  30 #endif
  31
  32 #include <glib/gdataset.h>
  33 #include <glib/ghash.h>
  34
  35 G_BEGIN_DECLS
  36
  37 typedef struct _GScanner        GScanner;
  38 typedef struct _GScannerConfig  GScannerConfig;
  39 typedef union  _GTokenValue     GTokenValue;
  40
  41 typedef void            (*GScannerMsgFunc)      (GScanner      *scanner,
  42                                                  gchar         *message,
  43                                                  gboolean       error);
  44
  45 /* GScanner: Flexible lexical scanner for general purpose.
  46  */
  47
  48 /* Character sets */
  49 #define G_CSET_A_2_Z    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  50 #define G_CSET_a_2_z    "abcdefghijklmnopqrstuvwxyz"
  51 #define G_CSET_DIGITS   "0123456789"
  52 #define G_CSET_LATINC   "\300\301\302\303\304\305\306"\
  53                         "\307\310\311\312\313\314\315\316\317\320"\
  54                         "\321\322\323\324\325\326"\
  55                         "\330\331\332\333\334\335\336"
  56 #define G_CSET_LATINS   "\337\340\341\342\343\344\345\346"\
  57                         "\347\350\351\352\353\354\355\356\357\360"\
  58                         "\361\362\363\364\365\366"\
  59                         "\370\371\372\373\374\375\376\377"
  60
  61 /* Error types */
  62 typedef enum
  63 {
  64   G_ERR_UNKNOWN,
  65   G_ERR_UNEXP_EOF,
  66   G_ERR_UNEXP_EOF_IN_STRING,
  67   G_ERR_UNEXP_EOF_IN_COMMENT,
  68   G_ERR_NON_DIGIT_IN_CONST,
  69   G_ERR_DIGIT_RADIX,
  70   G_ERR_FLOAT_RADIX,
  71   G_ERR_FLOAT_MALFORMED
  72 } GErrorType;
  73
  74 /* Token types */
  75 typedef enum
  76 {
  77   G_TOKEN_EOF                   =   0,
  78
  79   G_TOKEN_LEFT_PAREN            = '(',
  80   G_TOKEN_RIGHT_PAREN           = ')',
  81   G_TOKEN_LEFT_CURLY            = '{',
  82   G_TOKEN_RIGHT_CURLY           = '}',
  83   G_TOKEN_LEFT_BRACE            = '[',
  84   G_TOKEN_RIGHT_BRACE           = ']',
  85   G_TOKEN_EQUAL_SIGN            = '=',
  86   G_TOKEN_COMMA                 = ',',
  87
  88   G_TOKEN_NONE                  = 256,
  89
  90   G_TOKEN_ERROR,
  91
  92   G_TOKEN_CHAR,
  93   G_TOKEN_BINARY,
  94   G_TOKEN_OCTAL,
  95   G_TOKEN_INT,
  96   G_TOKEN_HEX,
  97   G_TOKEN_FLOAT,
  98   G_TOKEN_STRING,
  99
 100   G_TOKEN_SYMBOL,
 101   G_TOKEN_IDENTIFIER,
 102   G_TOKEN_IDENTIFIER_NULL,
 103
 104   G_TOKEN_COMMENT_SINGLE,
 105   G_TOKEN_COMMENT_MULTI,
 106
 107   /*< private >*/
 108   G_TOKEN_LAST
 109 } GTokenType;
 110
 111 union   _GTokenValue
 112 {
 113   gpointer      v_symbol;
 114   gchar         *v_identifier;
 115   gulong        v_binary;
 116   gulong        v_octal;
 117   gulong        v_int;
 118   guint64       v_int64;
 119   gdouble       v_float;
 120   gulong        v_hex;
 121   gchar         *v_string;
 122   gchar         *v_comment;
 123   guchar        v_char;
 124   guint         v_error;
 125 };
 126
 127 struct  _GScannerConfig
 128 {
 129   /* Character sets
 130    */
 131   gchar         *cset_skip_characters;          /* default: " \t\n" */
 132   gchar         *cset_identifier_first;
 133   gchar         *cset_identifier_nth;
 134   gchar         *cpair_comment_single;          /* default: "#\n" */
 135
 136   /* Should symbol lookup work case sensitive?
 137    */
 138   guint         case_sensitive : 1;
 139
 140   /* Boolean values to be adjusted "on the fly"
 141    * to configure scanning behaviour.
 142    */
 143   guint         skip_comment_multi : 1;         /* C like comment */
 144   guint         skip_comment_single : 1;        /* single line comment */
 145   guint         scan_comment_multi : 1;         /* scan multi line comments? */
 146   guint         scan_identifier : 1;
 147   guint         scan_identifier_1char : 1;
 148   guint         scan_identifier_NULL : 1;
 149   guint         scan_symbols : 1;
 150   guint         scan_binary : 1;
 151   guint         scan_octal : 1;
 152   guint         scan_float : 1;
 153   guint         scan_hex : 1;                   /* '0x0ff0' */
 154   guint         scan_hex_dollar : 1;            /* '$0ff0' */
 155   guint         scan_string_sq : 1;             /* string: 'anything' */
 156   guint         scan_string_dq : 1;             /* string: "\\-escapes!\n" */
 157   guint         numbers_2_int : 1;              /* bin, octal, hex => int */
 158   guint         int_2_float : 1;                /* int => G_TOKEN_FLOAT? */
 159   guint         identifier_2_string : 1;
 160   guint         char_2_token : 1;               /* return G_TOKEN_CHAR? */
 161   guint         symbol_2_token : 1;
 162   guint         scope_0_fallback : 1;           /* try scope 0 on lookups? */
 163   guint         store_int64 : 1;                /* use value.v_int64 rather than v_int */
 164
 165   /*< private >*/
 166   guint         padding_dummy;
 167 };
 168
 169 struct  _GScanner
 170 {
 171   /* unused fields */
 172   gpointer              user_data;
 173   guint                 max_parse_errors;
 174
 175   /* g_scanner_error() increments this field */
 176   guint                 parse_errors;
 177
 178   /* name of input stream, featured by the default message handler */
 179   const gchar           *input_name;
 180
 181   /* quarked data */
 182   GData                 *qdata;
 183
 184   /* link into the scanner configuration */
 185   GScannerConfig        *config;
 186
 187   /* fields filled in after g_scanner_get_next_token() */
 188   GTokenType            token;
 189   GTokenValue           value;
 190   guint                 line;
 191   guint                 position;
 192
 193   /* fields filled in after g_scanner_peek_next_token() */
 194   GTokenType            next_token;
 195   GTokenValue           next_value;
 196   guint                 next_line;
 197   guint                 next_position;
 198
 199   /*< private >*/
 200   /* to be considered private */
 201   GHashTable            *symbol_table;
 202   gint                  input_fd;
 203   const gchar           *text;
 204   const gchar           *text_end;
 205   gchar                 *buffer;
 206   guint                 scope_id;
 207
 208   /*< public >*/
 209   /* handler function for _warn and _error */
 210   GScannerMsgFunc       msg_handler;
 211 };
 212
 213 GLIB_AVAILABLE_IN_ALL
 214 GScanner*       g_scanner_new                   (const GScannerConfig *config_templ);
 215 GLIB_AVAILABLE_IN_ALL
 216 void            g_scanner_destroy               (GScanner       *scanner);
 217 GLIB_AVAILABLE_IN_ALL
 218 void            g_scanner_input_file            (GScanner       *scanner,
 219                                                  gint           input_fd);
 220 GLIB_AVAILABLE_IN_ALL
 221 void            g_scanner_sync_file_offset      (GScanner       *scanner);
 222 GLIB_AVAILABLE_IN_ALL
 223 void            g_scanner_input_text            (GScanner       *scanner,
 224                                                  const  gchar   *text,
 225                                                  guint          text_len);
 226 GLIB_AVAILABLE_IN_ALL
 227 GTokenType      g_scanner_get_next_token        (GScanner       *scanner);
 228 GLIB_AVAILABLE_IN_ALL
 229 GTokenType      g_scanner_peek_next_token       (GScanner       *scanner);
 230 GLIB_AVAILABLE_IN_ALL
 231 GTokenType      g_scanner_cur_token             (GScanner       *scanner);
 232 GLIB_AVAILABLE_IN_ALL
 233 GTokenValue     g_scanner_cur_value             (GScanner       *scanner);
 234 GLIB_AVAILABLE_IN_ALL
 235 guint           g_scanner_cur_line              (GScanner       *scanner);
 236 GLIB_AVAILABLE_IN_ALL
 237 guint           g_scanner_cur_position          (GScanner       *scanner);
 238 GLIB_AVAILABLE_IN_ALL
 239 gboolean        g_scanner_eof                   (GScanner       *scanner);
 240 GLIB_AVAILABLE_IN_ALL
 241 guint           g_scanner_set_scope             (GScanner       *scanner,
 242                                                  guint           scope_id);
 243 GLIB_AVAILABLE_IN_ALL
 244 void            g_scanner_scope_add_symbol      (GScanner       *scanner,
 245                                                  guint           scope_id,
 246                                                  const gchar    *symbol,
 247                                                  gpointer       value);
 248 GLIB_AVAILABLE_IN_ALL
 249 void            g_scanner_scope_remove_symbol   (GScanner       *scanner,
 250                                                  guint           scope_id,
 251                                                  const gchar    *symbol);
 252 GLIB_AVAILABLE_IN_ALL
 253 gpointer        g_scanner_scope_lookup_symbol   (GScanner       *scanner,
 254                                                  guint           scope_id,
 255                                                  const gchar    *symbol);
 256 GLIB_AVAILABLE_IN_ALL
 257 void            g_scanner_scope_foreach_symbol  (GScanner       *scanner,
 258                                                  guint           scope_id,
 259                                                  GHFunc          func,
 260                                                  gpointer        user_data);
 261 GLIB_AVAILABLE_IN_ALL
 262 gpointer        g_scanner_lookup_symbol         (GScanner       *scanner,
 263                                                  const gchar    *symbol);
 264 GLIB_AVAILABLE_IN_ALL
 265 void            g_scanner_unexp_token           (GScanner       *scanner,
 266                                                  GTokenType     expected_token,
 267                                                  const gchar    *identifier_spec,
 268                                                  const gchar    *symbol_spec,
 269                                                  const gchar    *symbol_name,
 270                                                  const gchar    *message,
 271                                                  gint            is_error);
 272 GLIB_AVAILABLE_IN_ALL
 273 void            g_scanner_error                 (GScanner       *scanner,
 274                                                  const gchar    *format,
 275                                                  ...) G_GNUC_PRINTF (2,3);
 276 GLIB_AVAILABLE_IN_ALL
 277 void            g_scanner_warn                  (GScanner       *scanner,
 278                                                  const gchar    *format,
 279                                                  ...) G_GNUC_PRINTF (2,3);
 280
 281 #ifndef G_DISABLE_DEPRECATED
 282
 283 /* keep downward source compatibility */
 284 #define         g_scanner_add_symbol( scanner, symbol, value )  G_STMT_START { \
 285   g_scanner_scope_add_symbol ((scanner), 0, (symbol), (value)); \
 286 } G_STMT_END
 287 #define         g_scanner_remove_symbol( scanner, symbol )      G_STMT_START { \
 288   g_scanner_scope_remove_symbol ((scanner), 0, (symbol)); \
 289 } G_STMT_END
 290 #define         g_scanner_foreach_symbol( scanner, func, data ) G_STMT_START { \
 291   g_scanner_scope_foreach_symbol ((scanner), 0, (func), (data)); \
 292 } G_STMT_END
 293
 294 /* The following two functions are deprecated and will be removed in
 295  * the next major release. They do no good. */
 296 #define g_scanner_freeze_symbol_table(scanner) ((void)0)
 297 #define g_scanner_thaw_symbol_table(scanner) ((void)0)
 298
 299 #endif /* G_DISABLE_DEPRECATED */
 300
 301 G_END_DECLS
 302
 303 #endif /* __G_SCANNER_H__ */