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/* Copyright (C) 2023 Aryadev Chavali
* You may distribute and modify this code under the terms of the
* GPLv2 license. You should have received a copy of the GPLv2
* license with this file. If not, please write to:
* aryadev@aryadevchavali.com.
* Created: 2023-10-24
* Author: Aryadev Chavali
* Description: Parser for assembly language
*/
#ifndef PARSER_H
#define PARSER_H
#include "./lexer.h"
#include <lib/inst.h>
typedef enum
{
PERR_OK = 0,
PERR_INTEGER_OVERFLOW,
PERR_NOT_A_NUMBER,
PERR_EXPECTED_UTYPE,
PERR_EXPECTED_TYPE,
PERR_EXPECTED_SYMBOL,
PERR_EXPECTED_LABEL,
PERR_EXPECTED_OPERAND,
PERR_PREPROCESSOR_EXPECTED_NAME,
PERR_PREPROCESSOR_EXPECTED_STRING,
PERR_PREPROCESSOR_EXPECTED_END,
PERR_PREPROCESSOR_FILE_NONEXISTENT,
PERR_PREPROCESSOR_FILE_PARSE_ERROR,
PERR_PREPROCESSOR_UNKNOWN_NAME,
PERR_INVALID_RELATIVE_ADDRESS,
PERR_UNKNOWN_OPERATOR,
PERR_UNKNOWN_LABEL,
} perr_t;
const char *perr_as_cstr(perr_t);
typedef struct
{
size_t stream_index;
inst_t instruction;
s_word address;
struct PLabel
{
char *name;
size_t size;
} label;
enum PResult_Type
{
PRES_LABEL = 0,
PRES_LABEL_ADDRESS,
PRES_GLOBAL_LABEL,
PRES_RELATIVE_ADDRESS,
PRES_COMPLETE_RESULT,
} type;
} presult_t;
presult_t presult_label(size_t, const char *, size_t, s_word);
presult_t presult_label_ref(size_t, inst_t, const char *, size_t);
presult_t presult_instruction(size_t, inst_t);
presult_t presult_relative(size_t, inst_t, s_word);
presult_t presult_global(size_t, const char *, size_t, s_word);
void presult_free(presult_t);
void presults_free(presult_t *, size_t);
typedef struct
{
char *name;
size_t name_size;
word addr;
} label_t;
label_t search_labels(label_t *, size_t, char *, size_t);
typedef struct
{
char *name;
size_t name_size;
darr_t code;
} block_t;
block_t search_blocks(block_t *, size_t, char *, size_t);
// Analyses then inlines corresponding tokens into stream directly
perr_t preprocessor(token_stream_t *);
// Parses from the preprocessed stream
perr_t parse_next(token_stream_t *, presult_t *);
// Deals with address building
perr_t process_presults(presult_t *, size_t, prog_t **);
perr_t parse_stream(token_stream_t *, prog_t **);
#endif
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