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, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GLib Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GLib at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  28 #error "Only <glib.h> can be included directly."
  29 #endif
  30
  31 #ifndef __G_SCANNER_H__
  32 #define __G_SCANNER_H__
  33
  34 #include <glib/gdataset.h>
  35 #include <glib/ghash.h>
  36
  37 G_BEGIN_DECLS
  38
  39 typedef struct _GScanner        GScanner;
  40 typedef struct _GScannerConfig  GScannerConfig;
  41 typedef union  _GTokenValue     GTokenValue;
  42
  43 typedef void            (*GScannerMsgFunc)      (GScanner      *scanner,
  44                                                  gchar         *message,
  45                                                  gboolean       error);
  46
  47 /* GScanner: Flexible lexical scanner for general purpose.
  48  */
  49
  50 /* Character sets */
  51 #define G_CSET_A_2_Z    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
  52 #define G_CSET_a_2_z    "abcdefghijklmnopqrstuvwxyz"
  53 #define G_CSET_DIGITS   "0123456789"
  54 #define G_CSET_LATINC   "\300\301\302\303\304\305\306"\
  55                         "\307\310\311\312\313\314\315\316\317\320"\
  56                         "\321\322\323\324\325\326"\
  57                         "\330\331\332\333\334\335\336"
  58 #define G_CSET_LATINS   "\337\340\341\342\343\344\345\346"\
  59                         "\347\350\351\352\353\354\355\356\357\360"\
  60                         "\361\362\363\364\365\366"\
  61                         "\370\371\372\373\374\375\376\377"
  62
  63 /* Error types */
  64 typedef enum
  65 {
  66   G_ERR_UNKNOWN,
  67   G_ERR_UNEXP_EOF,
  68   G_ERR_UNEXP_EOF_IN_STRING,
  69   G_ERR_UNEXP_EOF_IN_COMMENT,
  70   G_ERR_NON_DIGIT_IN_CONST,
  71   G_ERR_DIGIT_RADIX,
  72   G_ERR_FLOAT_RADIX,
  73   G_ERR_FLOAT_MALFORMED
  74 } GErrorType;
  75
  76 /* Token types */
  77 typedef enum
  78 {
  79   G_TOKEN_EOF                   =   0,
  80
  81   G_TOKEN_LEFT_PAREN            = '(',
  82   G_TOKEN_RIGHT_PAREN           = ')',
  83   G_TOKEN_LEFT_CURLY            = '{',
  84   G_TOKEN_RIGHT_CURLY           = '}',
  85   G_TOKEN_LEFT_BRACE            = '[',
  86   G_TOKEN_RIGHT_BRACE           = ']',
  87   G_TOKEN_EQUAL_SIGN            = '=',
  88   G_TOKEN_COMMA                 = ',',
  89
  90   G_TOKEN_NONE                  = 256,
  91
  92   G_TOKEN_ERROR,
  93
  94   G_TOKEN_CHAR,
  95   G_TOKEN_BINARY,
  96   G_TOKEN_OCTAL,
  97   G_TOKEN_INT,
  98   G_TOKEN_HEX,
  99   G_TOKEN_FLOAT,
 100   G_TOKEN_STRING,
 101
 102   G_TOKEN_SYMBOL,
 103   G_TOKEN_IDENTIFIER,
 104   G_TOKEN_IDENTIFIER_NULL,
 105
 106   G_TOKEN_COMMENT_SINGLE,
 107   G_TOKEN_COMMENT_MULTI,
 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   guint         padding_dummy;
 165 };
 166
 167 struct  _GScanner
 168 {
 169   /* unused fields */
 170   gpointer              user_data;
 171   guint                 max_parse_errors;
 172
 173   /* g_scanner_error() increments this field */
 174   guint                 parse_errors;
 175
 176   /* name of input stream, featured by the default message handler */
 177   const gchar           *input_name;
 178
 179   /* quarked data */
 180   GData                 *qdata;
 181
 182   /* link into the scanner configuration */
 183   GScannerConfig        *config;
 184
 185   /* fields filled in after g_scanner_get_next_token() */
 186   GTokenType            token;
 187   GTokenValue           value;
 188   guint                 line;
 189   guint                 position;
 190
 191   /* fields filled in after g_scanner_peek_next_token() */
 192   GTokenType            next_token;
 193   GTokenValue           next_value;
 194   guint                 next_line;
 195   guint                 next_position;
 196
 197   /* to be considered private */
 198   GHashTable            *symbol_table;
 199   gint                  input_fd;
 200   const gchar           *text;
 201   const gchar           *text_end;
 202   gchar                 *buffer;
 203   guint                 scope_id;
 204
 205   /* handler function for _warn and _error */
 206   GScannerMsgFunc       msg_handler;
 207 };
 208
 209 GScanner*       g_scanner_new                   (const GScannerConfig *config_templ);
 210 void            g_scanner_destroy               (GScanner       *scanner);
 211 void            g_scanner_input_file            (GScanner       *scanner,
 212                                                  gint           input_fd);
 213 void            g_scanner_sync_file_offset      (GScanner       *scanner);
 214 void            g_scanner_input_text            (GScanner       *scanner,
 215                                                  const  gchar   *text,
 216                                                  guint          text_len);
 217 GTokenType      g_scanner_get_next_token        (GScanner       *scanner);
 218 GTokenType      g_scanner_peek_next_token       (GScanner       *scanner);
 219 GTokenType      g_scanner_cur_token             (GScanner       *scanner);
 220 GTokenValue     g_scanner_cur_value             (GScanner       *scanner);
 221 guint           g_scanner_cur_line              (GScanner       *scanner);
 222 guint           g_scanner_cur_position          (GScanner       *scanner);
 223 gboolean        g_scanner_eof                   (GScanner       *scanner);
 224 guint           g_scanner_set_scope             (GScanner       *scanner,
 225                                                  guint           scope_id);
 226 void            g_scanner_scope_add_symbol      (GScanner       *scanner,
 227                                                  guint           scope_id,
 228                                                  const gchar    *symbol,
 229                                                  gpointer       value);
 230 void            g_scanner_scope_remove_symbol   (GScanner       *scanner,
 231                                                  guint           scope_id,
 232                                                  const gchar    *symbol);
 233 gpointer        g_scanner_scope_lookup_symbol   (GScanner       *scanner,
 234                                                  guint           scope_id,
 235                                                  const gchar    *symbol);
 236 void            g_scanner_scope_foreach_symbol  (GScanner       *scanner,
 237                                                  guint           scope_id,
 238                                                  GHFunc          func,
 239                                                  gpointer        user_data);
 240 gpointer        g_scanner_lookup_symbol         (GScanner       *scanner,
 241                                                  const gchar    *symbol);
 242 void            g_scanner_unexp_token           (GScanner       *scanner,
 243                                                  GTokenType     expected_token,
 244                                                  const gchar    *identifier_spec,
 245                                                  const gchar    *symbol_spec,
 246                                                  const gchar    *symbol_name,
 247                                                  const gchar    *message,
 248                                                  gint            is_error);
 249 void            g_scanner_error                 (GScanner       *scanner,
 250                                                  const gchar    *format,
 251                                                  ...) G_GNUC_PRINTF (2,3);
 252 void            g_scanner_warn                  (GScanner       *scanner,
 253                                                  const gchar    *format,
 254                                                  ...) G_GNUC_PRINTF (2,3);
 255
 256 #ifndef G_DISABLE_DEPRECATED
 257
 258 /* keep downward source compatibility */
 259 #define         g_scanner_add_symbol( scanner, symbol, value )  G_STMT_START { \
 260   g_scanner_scope_add_symbol ((scanner), 0, (symbol), (value)); \
 261 } G_STMT_END
 262 #define         g_scanner_remove_symbol( scanner, symbol )      G_STMT_START { \
 263   g_scanner_scope_remove_symbol ((scanner), 0, (symbol)); \
 264 } G_STMT_END
 265 #define         g_scanner_foreach_symbol( scanner, func, data ) G_STMT_START { \
 266   g_scanner_scope_foreach_symbol ((scanner), 0, (func), (data)); \
 267 } G_STMT_END
 268
 269 /* The following two functions are deprecated and will be removed in
 270  * the next major release. They do no good. */
 271 #define g_scanner_freeze_symbol_table(scanner) ((void)0)
 272 #define g_scanner_thaw_symbol_table(scanner) ((void)0)
 273
 274 #endif /* G_DISABLE_DEPRECATED */
 275
 276 G_END_DECLS
 277
 278 #endif /* __G_SCANNER_H__ */