146 lines
4.4 KiB
C
146 lines
4.4 KiB
C
/* lexer.h -- simple tokeniser for Micro Python
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*
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* Uses (byte) length instead of null termination.
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* Tokens are the same - UTF-8 with (byte) length.
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*/
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typedef enum _mp_token_kind_t {
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MP_TOKEN_END, // 0
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MP_TOKEN_INVALID,
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MP_TOKEN_DEDENT_MISMATCH,
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MP_TOKEN_LONELY_STRING_OPEN,
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MP_TOKEN_NEWLINE, // 4
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MP_TOKEN_INDENT, // 5
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MP_TOKEN_DEDENT, // 6
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MP_TOKEN_NAME, // 7
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MP_TOKEN_NUMBER,
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MP_TOKEN_STRING,
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MP_TOKEN_BYTES,
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MP_TOKEN_ELLIPSIS,
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MP_TOKEN_KW_FALSE, // 12
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MP_TOKEN_KW_NONE,
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MP_TOKEN_KW_TRUE,
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MP_TOKEN_KW_AND,
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MP_TOKEN_KW_AS,
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MP_TOKEN_KW_ASSERT,
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MP_TOKEN_KW_BREAK,
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MP_TOKEN_KW_CLASS,
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MP_TOKEN_KW_CONTINUE,
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MP_TOKEN_KW_DEF, // 21
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MP_TOKEN_KW_DEL,
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MP_TOKEN_KW_ELIF,
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MP_TOKEN_KW_ELSE,
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MP_TOKEN_KW_EXCEPT,
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MP_TOKEN_KW_FINALLY,
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MP_TOKEN_KW_FOR,
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MP_TOKEN_KW_FROM,
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MP_TOKEN_KW_GLOBAL,
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MP_TOKEN_KW_IF,
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MP_TOKEN_KW_IMPORT, // 31
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MP_TOKEN_KW_IN,
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MP_TOKEN_KW_IS,
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MP_TOKEN_KW_LAMBDA,
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MP_TOKEN_KW_NONLOCAL,
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MP_TOKEN_KW_NOT,
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MP_TOKEN_KW_OR,
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MP_TOKEN_KW_PASS,
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MP_TOKEN_KW_RAISE,
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MP_TOKEN_KW_RETURN,
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MP_TOKEN_KW_TRY, // 41
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MP_TOKEN_KW_WHILE,
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MP_TOKEN_KW_WITH,
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MP_TOKEN_KW_YIELD,
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MP_TOKEN_OP_PLUS, // 45
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MP_TOKEN_OP_MINUS,
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MP_TOKEN_OP_STAR,
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MP_TOKEN_OP_DBL_STAR,
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MP_TOKEN_OP_SLASH,
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MP_TOKEN_OP_DBL_SLASH,
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MP_TOKEN_OP_PERCENT,
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MP_TOKEN_OP_LESS,
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MP_TOKEN_OP_DBL_LESS,
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MP_TOKEN_OP_MORE,
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MP_TOKEN_OP_DBL_MORE, // 55
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MP_TOKEN_OP_AMPERSAND,
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MP_TOKEN_OP_PIPE,
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MP_TOKEN_OP_CARET,
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MP_TOKEN_OP_TILDE,
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MP_TOKEN_OP_LESS_EQUAL,
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MP_TOKEN_OP_MORE_EQUAL,
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MP_TOKEN_OP_DBL_EQUAL,
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MP_TOKEN_OP_NOT_EQUAL,
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MP_TOKEN_DEL_PAREN_OPEN, // 64
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MP_TOKEN_DEL_PAREN_CLOSE,
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MP_TOKEN_DEL_BRACKET_OPEN,
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MP_TOKEN_DEL_BRACKET_CLOSE,
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MP_TOKEN_DEL_BRACE_OPEN,
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MP_TOKEN_DEL_BRACE_CLOSE,
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MP_TOKEN_DEL_COMMA,
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MP_TOKEN_DEL_COLON,
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MP_TOKEN_DEL_PERIOD,
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MP_TOKEN_DEL_SEMICOLON,
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MP_TOKEN_DEL_AT, // 74
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MP_TOKEN_DEL_EQUAL,
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MP_TOKEN_DEL_PLUS_EQUAL,
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MP_TOKEN_DEL_MINUS_EQUAL,
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MP_TOKEN_DEL_STAR_EQUAL,
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MP_TOKEN_DEL_SLASH_EQUAL,
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MP_TOKEN_DEL_DBL_SLASH_EQUAL,
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MP_TOKEN_DEL_PERCENT_EQUAL,
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MP_TOKEN_DEL_AMPERSAND_EQUAL,
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MP_TOKEN_DEL_PIPE_EQUAL,
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MP_TOKEN_DEL_CARET_EQUAL, // 84
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MP_TOKEN_DEL_DBL_MORE_EQUAL,
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MP_TOKEN_DEL_DBL_LESS_EQUAL,
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MP_TOKEN_DEL_DBL_STAR_EQUAL,
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MP_TOKEN_DEL_MINUS_MORE,
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} mp_token_kind_t;
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typedef struct _mp_token_t {
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const char *src_name; // name of source
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uint src_line; // source line
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uint src_column; // source column
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mp_token_kind_t kind; // kind of token
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const char *str; // string of token (valid only while this token is current token)
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uint len; // (byte) length of string of token
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} mp_token_t;
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// the next-char function must return the next character in the stream
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// it must return MP_LEXER_CHAR_EOF if end of stream
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// it can be called again after returning MP_LEXER_CHAR_EOF, and in that case must return MP_LEXER_CHAR_EOF
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#define MP_LEXER_CHAR_EOF (-1)
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typedef unichar (*mp_lexer_stream_next_char_t)(void*);
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typedef void (*mp_lexer_stream_close_t)(void*);
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typedef struct _mp_lexer_t mp_lexer_t;
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void mp_token_show(const mp_token_t *tok);
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void mp_token_show_error_prefix(const mp_token_t *tok);
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bool mp_token_show_error(const mp_token_t *tok, const char *msg);
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mp_lexer_t *mp_lexer_new(const char *src_name, void *stream_data, mp_lexer_stream_next_char_t stream_next_char, mp_lexer_stream_close_t stream_close);
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mp_lexer_t *mp_lexer_new_from_str_len(const char *src_name, const char *str, uint len, uint free_len);
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void mp_lexer_free(mp_lexer_t *lex);
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void mp_lexer_to_next(mp_lexer_t *lex);
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const mp_token_t *mp_lexer_cur(const mp_lexer_t *lex);
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bool mp_lexer_is_kind(mp_lexer_t *lex, mp_token_kind_t kind);
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/* unused
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bool mp_lexer_is_str(mp_lexer_t *lex, const char *str);
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bool mp_lexer_opt_kind(mp_lexer_t *lex, mp_token_kind_t kind);
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bool mp_lexer_opt_str(mp_lexer_t *lex, const char *str);
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*/
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bool mp_lexer_show_error(mp_lexer_t *lex, const char *msg);
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bool mp_lexer_show_error_pythonic(mp_lexer_t *lex, const char *msg);
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// used to import a module; must be implemented for a specific port
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mp_lexer_t *mp_import_open_file(qstr mod_name);
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