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annotate lwlib/lw_expr.h @ 346:a82c55070624
Added expression parsing infrastructure and misc fixes
| author | lost@starbug |
|---|---|
| date | Sat, 27 Mar 2010 19:04:03 -0600 |
| parents | 7b4123dce741 |
| children | 1649bc7bda5a |
| rev | line source |
|---|---|
| 334 | 1 /* |
| 2 lwexpr.h | |
| 3 | |
| 4 Copyright © 2010 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 #ifndef ___lw_expr_h_seen___ | |
| 23 #define ___lw_expr_h_seen___ | |
| 24 | |
| 25 | |
| 26 enum | |
| 27 { | |
| 28 lw_expr_type_oper, // operator term | |
| 29 lw_expr_type_int, // integer | |
| 30 lw_expr_type_var, // a "variable" (string for the name) | |
| 31 lw_expr_type_special // a "special" reference (user defined) | |
| 32 }; | |
| 33 | |
| 34 enum | |
| 35 { | |
| 36 lw_expr_oper_plus = 1, // addition | |
| 37 lw_expr_oper_minus, // subtraction | |
| 38 lw_expr_oper_times, // multiplication | |
| 39 lw_expr_oper_divide, // division | |
| 40 lw_expr_oper_mod, // modulus | |
| 41 lw_expr_oper_intdiv, // integer division | |
| 42 lw_expr_oper_bwand, // bitwise and | |
| 43 lw_expr_oper_bwor, // bitwise or | |
| 44 lw_expr_oper_bwxor, // bitwise xor | |
| 45 lw_expr_oper_and, // boolean and | |
| 46 lw_expr_oper_or, // boolean or | |
| 47 lw_expr_oper_neg, // unary negation, 2's complement | |
|
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48 lw_expr_oper_com, // unary 1's complement |
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49 lw_expr_oper_none = 0 |
| 334 | 50 }; |
| 51 | |
| 52 #ifdef ___lw_expr_c_seen___ | |
| 53 | |
| 54 typedef struct lw_expr_priv * lw_expr_t; | |
| 55 | |
| 56 struct lw_expr_opers | |
| 57 { | |
| 58 lw_expr_t p; | |
| 59 struct lw_expr_opers *next; | |
| 60 }; | |
| 61 | |
| 62 struct lw_expr_priv | |
| 63 { | |
| 64 int type; // type of term | |
| 65 int value; // integer value | |
| 66 void *value2; // misc pointer value | |
| 67 struct lw_expr_opers *operands; // ptr to list of operands (for operators) | |
| 68 }; | |
| 69 | |
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70 typedef lw_expr_t lw_expr_fn_t(int t, void *ptr, void *priv); |
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71 typedef lw_expr_t lw_expr_fn2_t(char *var, void *priv); |
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72 typedef lw_expr_t lw_expr_fn3_t(char **p, void *priv); |
| 334 | 73 |
| 74 #else /* def ___lw_expr_c_seen___ */ | |
| 75 | |
| 76 typedef void * lw_expr_t; | |
| 77 | |
| 78 extern lw_expr_t lwexpr_create(void); | |
| 337 | 79 extern void lw_expr_destroy(lw_expr_t E); |
| 334 | 80 extern lw_expr_t lw_expr_copy(lw_expr_t E); |
| 81 extern void lw_expr_add_operand(lw_expr_t E, lw_expr_t O); | |
| 82 extern lw_expr_t lw_expr_build(int exprtype, ...); | |
| 83 extern void lw_expr_print(lw_expr_t E); | |
| 84 extern int lw_expr_compare(lw_expr_t E1, lw_expr_t E2); | |
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85 extern void lw_expr_simplify(lw_expr_t E, void *priv); |
| 337 | 86 |
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87 typedef lw_expr_t lw_expr_fn_t(int t, void *ptr, void *priv); |
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88 typedef lw_expr_t lw_expr_fn2_t(char *var, void *priv); |
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89 typedef lw_expr_t lw_expr_fn3_t(char **p, void *priv); |
| 342 | 90 |
| 91 extern void lw_expr_set_special_handler(lw_expr_fn_t *fn); | |
| 92 extern void lw_expr_set_var_handler(lw_expr_fn2_t *fn); | |
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93 extern void lw_expr_set_term_parser(lw_expr_fn3_t *fn); |
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94 |
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95 extern lw_expr_t lw_expr_parse(char **p, void *priv); |
| 334 | 96 |
| 97 #endif /* def ___lw_expr_c_seen___ */ | |
| 98 | |
| 99 #endif /* ___lw_expr_h_seen___ */ |