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81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/* ast.h
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*
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* Copyright (C) 2018 Henrik Hautakoski <henrik.hautakoski@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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. See the
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* GNU General Public License for more details.
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*
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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 the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef ASM_AST_H
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#define ASM_AST_H
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#include <vector.h>
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#include "symtab.h"
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// All datatypes in the language.
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enum ast_datatype {
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DATATYPE_NONE = 0, // Not an actual type.
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DATATYPE_REGISTER, // 4 bit unsigned.
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DATATYPE_NUMBER, // 8 bit signed.
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DATATYPE_STRING
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};
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// Struct to represent a single operand to a instruction.
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struct ast_instr_operand {
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enum ast_datatype type;
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union {
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uint8_t r;
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int8_t n;
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uint16_t addr;
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const char *s;
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};
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};
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// Struct to represent a single instruction.
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struct ast_instr {
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uint8_t opcode;
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uint8_t n_operands;
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struct ast_instr_operand operands[3];
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};
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// Structure to represent a program.
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struct ast {
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// List of instructions.
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struct vector instr;
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// List for storing label pointers (so we can free)
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struct vector labels;
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// Symbol table with label - location mapping.
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symtab_t *symbols;
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};
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void ast_init(struct ast* ast);
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void ast_free(struct ast* ast);
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// Add an instruction
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void ast_instr(struct ast* ast, uint8_t opcode);
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// Add an operand to the latest instruction.
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//void ast_instr_operand(struct ast* ast, const struct ast_instr_operand* op);
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void ast_instr_operand(struct ast* ast, enum ast_datatype type, void* value);
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void ast_location(struct ast* ast, const char *label, uint16_t loc);
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// For debugging :)
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void ast_print(struct ast* ast);
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#endif /* ASM_AST_H */
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