Aryadev Chavali
48d304056a
So when a presult_t is constructed it holds an index to where it was constructed in terms of the token stream. This will be useful when implementing an error checker in the preprocessing or result parsing stages.
98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
/* Copyright (C) 2023 Aryadev Chavali
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* You may distribute and modify this code under the terms of the
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* GPLv2 license. You should have received a copy of the GPLv2
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* license with this file. If not, please write to:
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* aryadev@aryadevchavali.com.
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* Created: 2023-10-24
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* Author: Aryadev Chavali
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* Description: Parser for assembly language
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*/
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#ifndef PARSER_H
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#define PARSER_H
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#include "./lexer.h"
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#include <lib/inst.h>
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typedef enum
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{
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PERR_OK = 0,
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PERR_INTEGER_OVERFLOW,
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PERR_NOT_A_NUMBER,
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PERR_EXPECTED_UTYPE,
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PERR_EXPECTED_TYPE,
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PERR_EXPECTED_SYMBOL,
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PERR_EXPECTED_LABEL,
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PERR_EXPECTED_OPERAND,
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PERR_PREPROCESSOR_EXPECTED_NAME,
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PERR_PREPROCESSOR_EXPECTED_STRING,
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PERR_PREPROCESSOR_EXPECTED_END,
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PERR_PREPROCESSOR_FILE_NONEXISTENT,
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PERR_PREPROCESSOR_FILE_PARSE_ERROR,
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PERR_PREPROCESSOR_UNKNOWN_NAME,
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PERR_INVALID_RELATIVE_ADDRESS,
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PERR_UNKNOWN_OPERATOR,
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PERR_UNKNOWN_LABEL,
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} perr_t;
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const char *perr_as_cstr(perr_t);
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typedef struct
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{
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size_t stream_index;
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inst_t instruction;
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s_word address;
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struct PLabel
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{
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char *name;
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size_t size;
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} label;
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enum PResult_Type
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{
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PRES_LABEL = 0,
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PRES_LABEL_ADDRESS,
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PRES_GLOBAL_LABEL,
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PRES_RELATIVE_ADDRESS,
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PRES_COMPLETE_RESULT,
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} type;
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} presult_t;
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presult_t presult_label(size_t, const char *, size_t, s_word);
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presult_t presult_label_ref(size_t, inst_t, const char *, size_t);
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presult_t presult_instruction(size_t, inst_t);
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presult_t presult_relative(size_t, inst_t, s_word);
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presult_t presult_global(size_t, const char *, size_t, s_word);
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void presult_free(presult_t);
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void presults_free(presult_t *, size_t);
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typedef struct
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{
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char *name;
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size_t name_size;
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word addr;
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} label_t;
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label_t search_labels(label_t *, size_t, char *, size_t);
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typedef struct
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{
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char *name;
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size_t name_size;
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darr_t code;
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} block_t;
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block_t search_blocks(block_t *, size_t, char *, size_t);
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// Analyses then inlines corresponding tokens into stream directly
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perr_t preprocessor(token_stream_t *);
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// Parses from the preprocessed stream
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perr_t parse_next(token_stream_t *, presult_t *);
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// Deals with address building
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perr_t process_presults(presult_t *, size_t, prog_t **);
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perr_t parse_stream(token_stream_t *, prog_t **);
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#endif
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