/*
* *****************************************************************************
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2018-2021 Gavin D. Howard and contributors.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* *****************************************************************************
*
* Definitions for bc's lexer.
*
*/
#ifndef BC_LEX_H
#define BC_LEX_H
#include <stdbool.h>
#include <stddef.h>
#include <status.h>
#include <vector.h>
#include <lang.h>
#define bc_lex_err(l, e) (bc_vm_handleError((e), (l)->line))
#define bc_lex_verr(l, e, ...) (bc_vm_handleError((e), (l)->line, __VA_ARGS__))
#if BC_ENABLED
#if DC_ENABLED
#define BC_LEX_NEG_CHAR (BC_IS_BC ? '-' : '_')
#define BC_LEX_LAST_NUM_CHAR (BC_IS_BC ? 'Z' : 'F')
#else // DC_ENABLED
#define BC_LEX_NEG_CHAR ('-')
#define BC_LEX_LAST_NUM_CHAR ('Z')
#endif // DC_ENABLED
#else // BC_ENABLED
#define BC_LEX_NEG_CHAR ('_')
#define BC_LEX_LAST_NUM_CHAR ('F')
#endif // BC_ENABLED
#define BC_LEX_NUM_CHAR(c, pt, int_only) \
(isdigit(c) || ((c) >= 'A' && (c) <= BC_LEX_LAST_NUM_CHAR) || \
((c) == '.' && !(pt) && !(int_only)))
// BC_LEX_NEG is not used in lexing; it is only for parsing.
typedef enum BcLexType {
BC_LEX_EOF,
BC_LEX_INVALID,
#if BC_ENABLED
BC_LEX_OP_INC,
BC_LEX_OP_DEC,
#endif // BC_ENABLED
BC_LEX_NEG,
BC_LEX_OP_BOOL_NOT,
#if BC_ENABLE_EXTRA_MATH
BC_LEX_OP_TRUNC,
#endif // BC_ENABLE_EXTRA_MATH
BC_LEX_OP_POWER,
BC_LEX_OP_MULTIPLY,
BC_LEX_OP_DIVIDE,
BC_LEX_OP_MODULUS,
BC_LEX_OP_PLUS,
BC_LEX_OP_MINUS,
#if BC_ENABLE_EXTRA_MATH
BC_LEX_OP_PLACES,
BC_LEX_OP_LSHIFT,
BC_LEX_OP_RSHIFT,
#endif // BC_ENABLE_EXTRA_MATH
BC_LEX_OP_REL_EQ,
BC_LEX_OP_REL_LE,
BC_LEX_OP_REL_GE,
BC_LEX_OP_REL_NE,
BC_LEX_OP_REL_LT,
BC_LEX_OP_REL_GT,
BC_LEX_OP_BOOL_OR,
BC_LEX_OP_BOOL_AND,
#if BC_ENABLED
BC_LEX_OP_ASSIGN_POWER,
BC_LEX_OP_ASSIGN_MULTIPLY,
BC_LEX_OP_ASSIGN_DIVIDE,
BC_LEX_OP_ASSIGN_MODULUS,
BC_LEX_OP_ASSIGN_PLUS,
BC_LEX_OP_ASSIGN_MINUS,
#if BC_ENABLE_EXTRA_MATH
BC_LEX_OP_ASSIGN_PLACES,
BC_LEX_OP_ASSIGN_LSHIFT,
BC_LEX_OP_ASSIGN_RSHIFT,
#endif // BC_ENABLE_EXTRA_MATH
#endif // BC_ENABLED
BC_LEX_OP_ASSIGN,
BC_LEX_NLINE,
BC_LEX_WHITESPACE,
BC_LEX_LPAREN,
BC_LEX_RPAREN,
BC_LEX_LBRACKET,
BC_LEX_COMMA,
BC_LEX_RBRACKET,
BC_LEX_LBRACE,
BC_LEX_SCOLON,
BC_LEX_RBRACE,
BC_LEX_STR,
BC_LEX_NAME,
BC_LEX_NUMBER,
#if BC_ENABLED
BC_LEX_KW_AUTO,
BC_LEX_KW_BREAK,
BC_LEX_KW_CONTINUE,
BC_LEX_KW_DEFINE,
BC_LEX_KW_FOR,
BC_LEX_KW_IF,
BC_LEX_KW_LIMITS,
BC_LEX_KW_RETURN,
BC_LEX_KW_WHILE,
BC_LEX_KW_HALT,
BC_LEX_KW_LAST,
#endif // BC_ENABLED
BC_LEX_KW_IBASE,
BC_LEX_KW_OBASE,
BC_LEX_KW_SCALE,
#if BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_SEED,
#endif // BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_LENGTH,
BC_LEX_KW_PRINT,
BC_LEX_KW_SQRT,
BC_LEX_KW_ABS,
#if BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_IRAND,
#endif // BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_QUIT,
BC_LEX_KW_READ,
#if BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_RAND,
#endif // BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_MAXIBASE,
BC_LEX_KW_MAXOBASE,
BC_LEX_KW_MAXSCALE,
#if BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_MAXRAND,
#endif // BC_ENABLE_EXTRA_MATH && BC_ENABLE_RAND
BC_LEX_KW_ELSE,
#if DC_ENABLED
BC_LEX_EQ_NO_REG,
BC_LEX_OP_MODEXP,
BC_LEX_OP_DIVMOD,
BC_LEX_COLON,
BC_LEX_EXECUTE,
BC_LEX_PRINT_STACK,
BC_LEX_CLEAR_STACK,
BC_LEX_STACK_LEVEL,
BC_LEX_DUPLICATE,
BC_LEX_SWAP,
BC_LEX_POP,
BC_LEX_ASCIIFY,
BC_LEX_PRINT_STREAM,
BC_LEX_STORE_IBASE,
BC_LEX_STORE_OBASE,
BC_LEX_STORE_SCALE,
#if BC_ENABLE_EXTRA_MATH
BC_LEX_STORE_SEED,
#endif // BC_ENABLE_EXTRA_MATH
BC_LEX_LOAD,
BC_LEX_LOAD_POP,
BC_LEX_STORE_PUSH,
BC_LEX_PRINT_POP,
BC_LEX_NQUIT,
BC_LEX_SCALE_FACTOR,
#endif // DC_ENABLED
} BcLexType;
struct BcLex;
typedef void (*BcLexNext)(struct BcLex*);
typedef struct BcLex {
const char *buf;
size_t i;
size_t line;
size_t len;
BcLexType t;
BcLexType last;
BcVec str;
} BcLex;
void bc_lex_init(BcLex *l);
void bc_lex_free(BcLex *l);
void bc_lex_file(BcLex *l, const char *file);
void bc_lex_text(BcLex *l, const char *text);
void bc_lex_next(BcLex *l);
void bc_lex_lineComment(BcLex *l);
void bc_lex_comment(BcLex *l);
void bc_lex_whitespace(BcLex *l);
void bc_lex_number(BcLex *l, char start);
void bc_lex_name(BcLex *l);
void bc_lex_commonTokens(BcLex *l, char c);
void bc_lex_invalidChar(BcLex *l, char c);
#endif // BC_LEX_H
