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annotate lwbasic/lwbasic.h @ 26:26aa76da75ad
Additional parsing in function/sub; emission of prolog/epilog code
| author | lost@l-w.ca |
|---|---|
| date | Thu, 27 Jan 2011 20:44:57 -0700 |
| parents | 87590f43e76d |
| children | 77626fc37af2 |
| rev | line source |
|---|---|
| 22 | 1 /* |
| 2 lwbasic.h | |
| 3 | |
| 4 Copyright © 2011 William Astle | |
| 5 | |
| 6 This file is part of LWTOOLS. | |
| 7 | |
| 8 LWTOOLS is free software: you can redistribute it and/or modify it under the | |
| 9 terms of the GNU General Public License as published by the Free Software | |
| 10 Foundation, either version 3 of the License, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 This program is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 16 more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License along with | |
| 19 this program. If not, see <http://www.gnu.org/licenses/>. | |
| 20 */ | |
| 21 | |
| 22 /* | |
| 23 definitions used throughout lwbasic | |
| 24 */ | |
| 25 | |
| 26 #ifndef __lwbasic_h_seen__ | |
| 27 #define __lwbasic_h_seen__ | |
| 28 | |
| 25 | 29 #include <stdint.h> |
| 30 | |
| 31 /* note: integer and uinteger will be the same for positive values from 0 | |
| 32 through 0x7FFFFFFF; the unsigned type should be used for doing ascii | |
| 33 conversions and then if a negative value was discovered, it should be | |
| 34 negated IFF it is in range. */ | |
| 35 | |
| 36 union lexer_numbers | |
| 37 { | |
| 38 uint32_t uinteger; | |
| 39 int32_t integer; | |
| 40 }; | |
| 41 | |
| 22 | 42 typedef struct |
| 43 { | |
| 44 char *output_file; | |
| 45 char *input_file; | |
| 46 | |
| 47 int debug_level; | |
| 25 | 48 |
| 49 char *lexer_token_string; | |
| 50 union lexer_numbers lexer_token_number; | |
| 51 int lexer_token; | |
| 52 int lexer_curchar; | |
| 53 int lexer_ignorechar; | |
| 54 | |
| 55 int parser_state; | |
| 23 | 56 |
| 57 void *input_state; | |
|
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58 |
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59 char *currentsub; |
| 22 | 60 } cstate; |
| 61 | |
| 25 | 62 /* parser states */ |
| 63 enum | |
| 64 { | |
| 65 parser_state_global = 0, /* only global decls allowed */ | |
| 66 parser_state_error | |
| 67 }; | |
| 68 | |
| 69 /* token types */ | |
| 70 enum | |
| 71 { | |
| 72 token_kw_sub, /* SUB keyword */ | |
| 73 token_kw_function, /* FUNCTION keyword */ | |
| 74 token_kw_as, /* AS keyword */ | |
| 75 token_kw_public, /* PUBLIC keyword */ | |
| 76 token_kw_private, /* PRIVATE keyword */ | |
| 77 token_kw_params, /* PARAMS keyword */ | |
| 78 token_kw_returns, /* RETURNS keyword */ | |
| 79 token_kw_integer, /* INTEGER keyword */ | |
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80 token_kw_endsub, /* ENDSUB keyword */ |
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81 token_kw_endfunction, /* ENDFUNCTION keyword */ |
| 25 | 82 token_identifier, /* an identifier (variable, function, etc. */ |
| 83 token_char, /* single character; fallback */ | |
| 84 token_uint, /* unsigned integer up to 32 bits */ | |
| 85 token_int, /* signed integer up to 32 bits */ | |
| 86 token_eol, /* end of line */ | |
| 87 token_eof /* end of file */ | |
| 88 }; | |
| 89 | |
| 23 | 90 #ifndef __input_c_seen__ |
| 91 extern int input_getchar(cstate *state); | |
| 92 #endif | |
| 93 | |
| 25 | 94 #ifndef __main_c_seen__ |
| 95 extern void lwb_error(const char *fmt, ...); | |
| 96 #endif | |
| 97 | |
| 98 #ifndef __lexer_c_seen__ | |
| 99 extern void lexer(cstate *state); | |
| 100 #endif | |
| 101 | |
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102 #ifndef __emit_c_seen__ |
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103 extern void emit_prolog(cstate *state, int vis, int framesize); |
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104 extern void emit_epilog(cstate *state); |
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105 #endif |
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106 |
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107 |
| 22 | 108 #endif /* __lwbasic_h_seen__ */ |