mirror of
https://git.code.sf.net/p/quake/quakeforge
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d2eb928210
For now, just dot product, trig, and min/max/bound, but it works well as a proof of concept. The main goal was actually min. Only the list of symbols is provided, it is the user's responsibility to set up the symbol table and context.
154 lines
4.2 KiB
C
154 lines
4.2 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 exprarray_s {
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exprtype_t *type;
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unsigned size;
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} exprarray_t;
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typedef struct exprctx_s {
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struct exprctx_s *parent; // for nested symol scopes
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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_array_getelement (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_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_array_binops[];
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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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extern exprsym_t cexpr_lib_symbols[];
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#endif//__QF_expr_h
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