144 lines
3.9 KiB
C
144 lines
3.9 KiB
C
/*
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cexpr.h
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Config expression parser. Or concurrent.
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Copyright (C) 2020 Bill Currie <bill@taniwha.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifndef __QF_expr_h
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#define __QF_expr_h
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#include <stdlib.h>
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struct exprval_s;
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struct exprctx_s;
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typedef struct binop_s {
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int op;
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struct exprtype_s *other;
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struct exprtype_s *result;
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void (*func) (const struct exprval_s *val1,
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const struct exprval_s *val2,
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struct exprval_s *result,
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struct exprctx_s *context);
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} binop_t;
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typedef struct unop_s {
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int op;
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struct exprtype_s *result;
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void (*func) (const struct exprval_s *val, struct exprval_s *result,
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struct exprctx_s *context);
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} unop_t;
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typedef struct exprtype_s {
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const char *name;
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size_t size;
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binop_t *binops;
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unop_t *unops;
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void *data;
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} exprtype_t;
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typedef struct exprval_s {
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exprtype_t *type;
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void *value;
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} exprval_t;
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typedef struct exprlist_s {
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struct exprlist_s *next;
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exprval_t *value;
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} exprlist_t;
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typedef struct exprsym_s {
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const char *name;
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exprtype_t *type;
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void *value;
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struct exprsym_s *next;
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} exprsym_t;
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typedef struct exprfunc_s {
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exprtype_t *result;
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int num_params;
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exprtype_t **param_types;
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void (*func) (const exprval_t **params, exprval_t *result,
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struct exprctx_s *context);
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} exprfunc_t;
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typedef struct exprtab_s {
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exprsym_t *symbols;
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struct hashtab_s *tab;
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} exprtab_t;
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typedef struct exprctx_s {
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exprval_t *result;
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exprtab_t *symtab; // directly accessible symbols
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exprtab_t *external_variables; // accessible via $id
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struct memsuper_s *memsuper;
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const struct plitem_s *item;
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struct plitem_s *messages;
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struct hashlink_s **hashlinks;
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int errors;
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} exprctx_t;
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typedef struct exprenum_s {
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exprtype_t *type;
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exprtab_t *symtab;
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} exprenum_t;
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int cexpr_parse_enum (exprenum_t *enm, const char *str,
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const exprctx_t *context, void *data);
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binop_t *cexpr_find_cast (exprtype_t *dst_type, exprtype_t *src_type) __attribute__((pure));
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exprval_t *cexpr_value (exprtype_t *type, exprctx_t *ctx);
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exprval_t *cexpr_value_reference (exprtype_t *type, void *data, exprctx_t *ctx);
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int cexpr_eval_string (const char *str, exprctx_t *context);
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void cexpr_error(exprctx_t *ctx, const char *fmt, ...) __attribute__((format(PRINTF,2,3)));
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void cexpr_struct_getfield (const exprval_t *a, const exprval_t *b,
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exprval_t *c, exprctx_t *ctx);
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void cexpr_struct_pointer_getfield (const exprval_t *a, const exprval_t *b,
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exprval_t *c, exprctx_t *ctx);
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exprval_t *cexpr_cvar (const char *name, exprctx_t *ctx);
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exprval_t *cexpr_cvar_struct (exprctx_t *ctx);
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void cexpr_cast_plitem (const exprval_t *val1, const exprval_t *src,
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exprval_t *result, exprctx_t *ctx);
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void cexpr_init_symtab (exprtab_t *symtab, exprctx_t *ctx);
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char *cexpr_yyget_text (void *scanner);
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extern exprtype_t cexpr_int;
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extern exprtype_t cexpr_uint;
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extern exprtype_t cexpr_size_t;
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extern exprtype_t cexpr_float;
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extern exprtype_t cexpr_double;
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extern exprtype_t cexpr_vector;
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extern exprtype_t cexpr_quaternion;
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extern exprtype_t cexpr_exprval;
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extern exprtype_t cexpr_field;
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extern exprtype_t cexpr_function;
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extern exprtype_t cexpr_plitem;
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extern binop_t cexpr_struct_binops[];
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extern binop_t cexpr_struct_pointer_binops[];
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#endif//__QF_expr_h
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