| 1 | /*
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| 2 | * Copyright (c) 2010 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef LEX_T_H_
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| 30 | #define LEX_T_H_
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| 31 |
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| 32 | /** Lexical element class */
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| 33 | typedef enum {
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| 34 | lc_invalid,
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| 35 | lc_eof,
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| 36 |
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| 37 | lc_ident,
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| 38 | lc_lit_int,
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| 39 | lc_lit_string,
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| 40 |
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| 41 | /* Keywords */
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| 42 | lc_as,
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| 43 | lc_builtin,
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| 44 | lc_class,
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| 45 | lc_constructor,
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| 46 | lc_do,
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| 47 | lc_else,
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| 48 | lc_end,
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| 49 | lc_except,
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| 50 | lc_finally,
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| 51 | lc_for,
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| 52 | lc_fun,
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| 53 | lc_new,
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| 54 | lc_get,
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| 55 | lc_if,
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| 56 | lc_in,
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| 57 | lc_int,
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| 58 | lc_interface,
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| 59 | lc_is,
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| 60 | lc_nil,
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| 61 | lc_override,
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| 62 | lc_packed,
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| 63 | lc_private,
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| 64 | lc_prop,
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| 65 | lc_protected,
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| 66 | lc_public,
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| 67 | lc_raise,
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| 68 | lc_resource,
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| 69 | lc_return,
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| 70 | lc_self,
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| 71 | lc_set,
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| 72 | lc_static,
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| 73 | lc_string,
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| 74 | lc_struct,
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| 75 | lc_then,
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| 76 | lc_this,
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| 77 | lc_var,
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| 78 | lc_with,
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| 79 | lc_while,
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| 80 | lc_yield,
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| 81 |
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| 82 | /* Operators */
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| 83 | lc_period,
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| 84 | lc_slash,
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| 85 | lc_lparen,
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| 86 | lc_rparen,
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| 87 | lc_lsbr,
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| 88 | lc_rsbr,
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| 89 | lc_equal,
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| 90 | lc_notequal,
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| 91 | lc_lt,
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| 92 | lc_gt,
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| 93 | lc_lt_equal,
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| 94 | lc_gt_equal,
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| 95 | lc_assign,
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| 96 | lc_plus,
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| 97 | lc_increase,
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| 98 |
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| 99 | /* Punctuators */
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| 100 | lc_comma,
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| 101 | lc_colon,
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| 102 | lc_scolon,
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| 103 |
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| 104 | lc__limit
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| 105 | } lclass_t;
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| 106 |
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| 107 | typedef struct {
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| 108 | /* String ID */
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| 109 | int sid;
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| 110 | } lem_ident_t;
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| 111 |
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| 112 | typedef struct {
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| 113 | /* Integer value */
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| 114 | int value;
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| 115 | } lem_lit_int_t;
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| 116 |
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| 117 | typedef struct {
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| 118 | /* String value */
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| 119 | char *value;
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| 120 | } lem_lit_string_t;
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| 121 |
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| 122 | /** Lexical element */
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| 123 | typedef struct {
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| 124 | /* Lexical element class */
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| 125 | lclass_t lclass;
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| 126 |
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| 127 | union {
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| 128 | lem_ident_t ident;
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| 129 | lem_lit_int_t lit_int;
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| 130 | lem_lit_string_t lit_string;
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| 131 | } u;
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| 132 |
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| 133 | /** Coordinates of this lexical element */
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| 134 | int line_no, col_0;
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| 135 | } lem_t;
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| 136 |
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| 137 | /** Lexer state object */
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| 138 | typedef struct lex {
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| 139 | /** Input object */
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| 140 | struct input *input;
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| 141 |
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| 142 | /** Lexing buffer */
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| 143 | char *inbuf;
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| 144 |
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| 145 | /** Pointer to current position in lexing buffer */
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| 146 | char *ibp;
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| 147 |
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| 148 | /** Number of the line currently in inbuf */
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| 149 | int ib_line;
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| 150 |
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| 151 | /** Column number adjustment (due to tabs) */
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| 152 | int col_adj;
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| 153 |
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| 154 | /** @c b_true if we have the next lem in @c current */
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| 155 | bool_t current_valid;
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| 156 |
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| 157 | /** Curent lem (only valid if @c current_valid is true) */
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| 158 | lem_t current;
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| 159 | } lex_t;
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| 160 |
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| 161 | #endif
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