2 * *****************************************************************************
4 * SPDX-License-Identifier: BSD-2-Clause
6 * Copyright (c) 2018-2023 Gavin D. Howard and contributors.
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30 * *****************************************************************************
32 * Definitions for dc only.
46 * The main function for dc. It just sets variables and passes its arguments
47 * through to @a bc_vm_boot().
50 dc_main(int argc, char* argv[]);
52 // A reference to the dc help text.
53 extern const char dc_help[];
56 * The @a BcLexNext function for dc. (See include/lex.h for a definition of
61 dc_lex_token(BcLex* l);
64 * Returns true if the negative char `_` should be treated as a command or not.
65 * dc considers negative a command if it does *not* immediately proceed a
66 * number. Otherwise, it's just considered a negative.
68 * @return True if a negative should be treated as a command, false if it
69 * should be treated as a negative sign on a number.
72 dc_lex_negCommand(BcLex* l);
74 // References to the signal message and its length.
75 extern const char dc_sig_msg[];
76 extern const uchar dc_sig_msg_len;
78 // References to an array and its length. This array is an array of lex tokens
79 // that, when encountered, should be treated as commands that take a register.
80 extern const uint8_t dc_lex_regs[];
81 extern const size_t dc_lex_regs_len;
83 // References to an array of tokens and its length. This array corresponds to
84 // the ASCII table, starting at double quotes. This makes it easy to look up
85 // tokens for characters.
86 extern const uint8_t dc_lex_tokens[];
87 extern const uint8_t dc_parse_insts[];
90 * The @a BcParseParse function for dc. (See include/parse.h for a definition of
92 * @param p The parser.
95 dc_parse_parse(BcParse* p);
98 * The @a BcParseExpr function for dc. (See include/parse.h for a definition of
100 * @param p The parser.
101 * @param flags Flags that define the requirements that the parsed code must
102 * meet or an error will result. See @a BcParseExpr for more info.
105 dc_parse_expr(BcParse* p, uint8_t flags);