src/data.c - platform/external/bc - Gitiles

 /*
  * *****************************************************************************
  *
  * Copyright 2018 Gavin D. Howard
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted.
  *
  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
  * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  * PERFORMANCE OF THIS SOFTWARE.
  *
  * *****************************************************************************
  *
  * Constant data for bc.
  *
  */

 #include <lex.h>
 #include <parse.h>
 #include <bc.h>
 #include <num.h>

 #ifdef BC_ENABLED
 // ** Exclude start. **
 const char bc_name[] = "bc";
 // ** Exclude end. **
 const char bc_sig_msg[] = "\ninterrupt (type \"quit\" to exit)\n";
 #endif // BC_ENABLED

 #ifdef DC_ENABLED
 const char dc_name[] = "dc";
 const char dc_sig_msg[] = "\ninturrupt (type \"q\" to exit)\n";
 #endif // DC_ENABLED

 const char bc_copyright[] =
 	"Copyright (c) 2018 Gavin D. Howard and contributors\n"
 	"Report bugs at: https://github.com/gavinhoward/bc\n\n"
 	"This is free software with ABSOLUTELY NO WARRANTY.\n";

 const char bc_err_fmt[] = "\n%s error: %s\n";
 const char bc_err_line[] = ":%zu\n\n";

 const char *bc_errs[] = {
 	"VM",
 	"Lex",
 	"Parse",
 	"Math",
 	"Runtime",
 	"POSIX",
 };

 const uint8_t bc_err_indices[] = {
 	BC_ERR_IDX_VM, BC_ERR_IDX_VM, BC_ERR_IDX_VM, BC_ERR_IDX_VM,
 	BC_ERR_IDX_LEX, BC_ERR_IDX_LEX, BC_ERR_IDX_LEX, BC_ERR_IDX_LEX,
 #ifdef DC_ENABLED
 	BC_ERR_IDX_LEX,
 #endif // DC_ENABLED
 	BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE,
 	BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE,
 	BC_ERR_IDX_MATH, BC_ERR_IDX_MATH, BC_ERR_IDX_MATH, BC_ERR_IDX_MATH,
 	BC_ERR_IDX_MATH, BC_ERR_IDX_MATH,
 #ifdef DC_ENABLED
 	BC_ERR_IDX_MATH,
 #endif // DC_ENABLED
 	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
 	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
 	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
 	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
 	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
 	BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX,
 	BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX,
 	BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX,
 	BC_ERR_IDX_VEC, BC_ERR_IDX_VEC,
 	BC_ERR_IDX_VM, BC_ERR_IDX_VM, BC_ERR_IDX_VM,
 };

 const char *bc_err_descs[] = {

 	NULL,
 	"memory allocation error",
 	"I/O error",
 	"file is not text:",

 	"bad character",
 	"string end could not be found",
 	"comment end could not be found",
 	"end of file",
 #ifdef DC_ENABLED
 	"extended register",
 #endif // DC_ENABLED

 	"bad token",
 	"bad expression",
 	"empty expression",
 	"bad print statement",
 	"bad function definition",
 	"bad assignment: left side must be scale, ibase, "
 		"obase, last, var, or array element",
 	"no auto variable found",
 	"function parameter or auto var has the same name as another",
 	"block end could not be found",

 	"negative number",
 	"non integer number",
 	"overflow",
 	"divide by zero",
 	"negative square root",
 	"bad number string",
 #ifdef DC_ENABLED
 	"modulus overflowed base",
 #endif // DC_ENABLED

 	"could not open file:",
 	"mismatched parameters",
 	"undefined function",
 	"file is not executable:",
 	"could not install signal handler",
 	"bad scale; must be [0, BC_SCALE_MAX]",
 	"bad ibase; must be [2, 16]",
 	"bad obase; must be [2, BC_BASE_MAX]",
 	"number too long: must be [1, BC_NUM_MAX]",
 	"name too long: must be [1, BC_NAME_MAX]",
 	"string too long: must be [1, BC_STRING_MAX]",
 	"array too long; must be [1, BC_DIM_MAX]",
 	"bad read() expression",
 	"read() call inside of a read() call",
 	"variable is wrong type",
 	"signal caught",
 	"stack has too few elements",

 	"POSIX only allows one character names; the following is bad:",
 	"POSIX does not allow '#' script comments",
 	"POSIX does not allow the following keyword:",
 	"POSIX does not allow a period ('.') as a shortcut for the last result",
 	"POSIX requires parentheses around return expressions",
 	"POSIX does not allow boolean operators; the following is bad:",
 	"POSIX does not allow comparison operators outside if or loops",
 	"POSIX requires exactly one comparison operator per condition",
 	"POSIX does not allow an empty init expression in a for loop",
 	"POSIX does not allow an empty condition expression in a for loop",
 	"POSIX does not allow an empty update expression in a for loop",
 	"POSIX requires the left brace be on the same line as the function header",

 	"index is out of bounds",
 	"item already exists",

 #ifndef NDEBUG
 	"quit request not honored",
 	"limits request not honored",
 #endif // NDEBUG

 };

 const char bc_func_main[] = "(main)";
 const char bc_func_read[] = "(read)";

 #ifndef NDEBUG
 const char bc_inst_chars[] =
 	"edED_^*/%+-=;?~<>!|&`{}@[],NVMACaI.LlrOqpQsSJjPR$HovxzcZdfghkK";
 #endif // NDEBUG

 #ifdef BC_ENABLED
 const BcLexKeyword bc_lex_kws[20] = {
 	BC_LEX_KW_ENTRY("auto", 4, true),
 	BC_LEX_KW_ENTRY("break", 5, true),
 	BC_LEX_KW_ENTRY("continue", 8, false),
 	BC_LEX_KW_ENTRY("define", 6, true),
 	BC_LEX_KW_ENTRY("else", 4, false),
 	BC_LEX_KW_ENTRY("for", 3, true),
 	BC_LEX_KW_ENTRY("halt", 4, false),
 	BC_LEX_KW_ENTRY("ibase", 5, true),
 	BC_LEX_KW_ENTRY("if", 2, true),
 	BC_LEX_KW_ENTRY("last", 4, false),
 	BC_LEX_KW_ENTRY("length", 6, true),
 	BC_LEX_KW_ENTRY("limits", 6, false),
 	BC_LEX_KW_ENTRY("obase", 5, true),
 	BC_LEX_KW_ENTRY("print", 5, false),
 	BC_LEX_KW_ENTRY("quit", 4, true),
 	BC_LEX_KW_ENTRY("read", 4, false),
 	BC_LEX_KW_ENTRY("return", 6, true),
 	BC_LEX_KW_ENTRY("scale", 5, true),
 	BC_LEX_KW_ENTRY("sqrt", 4, true),
 	BC_LEX_KW_ENTRY("while", 5, true),
 };

 // This is an array that corresponds to token types. An entry is
 // true if the token is valid in an expression, false otherwise.
 const bool bc_parse_exprs[] = {
 	false, false, true, true, true, true, true, true, true, true, true, true,
 	true, true, true, true, true, true, true, true, true, true, true, true,
 	true, true, true, false, false, true, true, false, false, false, false,
 	false, false, false, true, true, false, false, false, false, false, false,
 	false, true, false, true, true, true, true, false, false, true, false, true,
 	true, false,
 };

 // This is an array of data for operators that correspond to token types.
 const BcOp bc_parse_ops[] = {
 	{ 0, false }, { 0, false },
 	{ 1, false },
 	{ 2, false },
 	{ 3, true }, { 3, true }, { 3, true },
 	{ 4, true }, { 4, true },
 	{ 6, true }, { 6, true }, { 6, true }, { 6, true }, { 6, true }, { 6, true },
 	{ 1, false },
 	{ 7, true }, { 7, true },
 	{ 5, false }, { 5, false }, { 5, false }, { 5, false }, { 5, false },
 	{ 5, false }, { 5, false },
 };

 // These identify what tokens can come after expressions in certain cases.
 const BcParseNext bc_parse_next_expr =
 	BC_PARSE_NEXT(3, BC_LEX_NLINE, BC_LEX_SCOLON, BC_LEX_RBRACE);
 const BcParseNext bc_parse_next_param =
 	BC_PARSE_NEXT(2, BC_LEX_RPAREN, BC_LEX_COMMA);
 const BcParseNext bc_parse_next_print =
 	BC_PARSE_NEXT(3, BC_LEX_COMMA, BC_LEX_NLINE, BC_LEX_SCOLON);
 const BcParseNext bc_parse_next_cond = BC_PARSE_NEXT(1, BC_LEX_RPAREN);
 const BcParseNext bc_parse_next_elem = BC_PARSE_NEXT(1, BC_LEX_RBRACKET);
 const BcParseNext bc_parse_next_for = BC_PARSE_NEXT(1, BC_LEX_SCOLON);
 #endif // BC_ENABLED

 // This one is needed for dc too.
 const BcParseNext bc_parse_next_read = BC_PARSE_NEXT(1, BC_LEX_NLINE);

 #ifdef DC_ENABLED
 const uint8_t dc_inst_noperands[] = {
 	1, 1, 1, 1, 1,
 	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
 	1, 2, 2, 2, 2, 2, 2, 2, 2, 2,
 	0, 0, 1, 0, 0,
 	1, 0, 0, 0, 1, 0, 0, 1,
 	1, 1, 0, 1, 0, 1, 1, 1, 0, 0,
 	3, 2, 1, 0, 0, 0, 1, 2, 0, 1, 0, 1,
 };

 const uint8_t dc_inst_nresults[] = {
 	1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 0,
 	1, 1, 1, 1, 1, 1, 1, 1,
 	1, 0, 1, 0, 0, 1, 0, 1, 1, 0,
 	1, 2, 0, 0, 0, 1, 2, 2, 1, 0, 0, 0,
 };

 const BcLexType dc_lex_regs[] = {
 	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_SCOLON, BC_LEX_COLON,
 	BC_LEX_ELSE, BC_LEX_LOAD, BC_LEX_LOAD_POP, BC_LEX_STORE,BC_LEX_STORE_PUSH,
 };

 const size_t dc_lex_regs_len = sizeof(dc_lex_regs) / sizeof(BcLexType);

 const BcLexType dc_lex_tokens[] = {
 	BC_LEX_OP_MODULUS, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_LPAREN,
 	BC_LEX_INVALID, BC_LEX_OP_MULTIPLY, BC_LEX_OP_PLUS, BC_LEX_INVALID,
 	BC_LEX_OP_MINUS, BC_LEX_INVALID, BC_LEX_OP_DIVIDE,
 	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_COLON, BC_LEX_SCOLON, BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_KEY_READ, BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_ELSE,
 	BC_LEX_INVALID, BC_LEX_EQ_NO_REG, BC_LEX_INVALID, BC_LEX_KEY_IBASE,
 	BC_LEX_INVALID, BC_LEX_KEY_SCALE, BC_LEX_LOAD, BC_LEX_INVALID,
 	BC_LEX_OP_BOOL_NOT, BC_LEX_KEY_OBASE, BC_LEX_PRINT_POP, BC_LEX_NQUIT,
 	BC_LEX_POP, BC_LEX_STORE, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_SCALE_FACTOR, BC_LEX_INVALID, BC_LEX_KEY_LENGTH,
 	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_OP_POWER,
 	BC_LEX_NEG, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_CLEAR_STACK, BC_LEX_DUPLICATE,
 	BC_LEX_INVALID, BC_LEX_PRINT_STACK, BC_LEX_INVALID, BC_LEX_INVALID,
 	BC_LEX_STORE_IBASE, BC_LEX_INVALID, BC_LEX_STORE_SCALE, BC_LEX_LOAD_POP,
 	BC_LEX_INVALID, BC_LEX_PRINT_POP, BC_LEX_STORE_OBASE, BC_LEX_KEY_PRINT,
 	BC_LEX_KEY_QUIT, BC_LEX_SWAP, BC_LEX_STORE_PUSH, BC_LEX_INVALID,
 	BC_LEX_INVALID, BC_LEX_KEY_SQRT, BC_LEX_INVALID, BC_LEX_EXECUTE,
 	BC_LEX_INVALID, BC_LEX_STACK_LEVEL,
 	BC_LEX_LBRACE, BC_LEX_OP_MODEXP, BC_LEX_INVALID, BC_LEX_OP_DIVMOD,
 	BC_LEX_INVALID
 };

 const BcInst dc_parse_insts[] = {
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
 	BC_INST_INVALID, BC_INST_POWER, BC_INST_MULTIPLY, BC_INST_DIVIDE,
 	BC_INST_MODULUS, BC_INST_PLUS, BC_INST_MINUS,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_BOOL_NOT, BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_ASSIGN,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GT, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
 	BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_STR, BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_IBASE,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_LENGTH, BC_INST_INVALID,
 	BC_INST_OBASE, BC_INST_PRINT, BC_INST_QUIT, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_SCALE, BC_INST_SQRT, BC_INST_INVALID,
 	BC_INST_REL_EQ, BC_INST_MODEXP, BC_INST_DIVMOD, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_EXECUTE, BC_INST_PRINT_STACK, BC_INST_CLEAR_STACK,
 	BC_INST_STACK_LEN, BC_INST_DUPLICATE, BC_INST_SWAP, BC_INST_POP,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
 	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_PRINT,
 	BC_INST_INVALID, BC_INST_NQUIT, BC_INST_SCALE_FUNC,
 };
 #endif // DC_ENABLED

 const char bc_num_hex_digits[] = "0123456789ABCDEF";

 const BcNumBinaryOp bc_program_ops[] = {
 	bc_num_pow, bc_num_mul, bc_num_div, bc_num_rem, bc_num_add, bc_num_sub,
 };

 const char bc_program_stdin_name[] = "<stdin>";
 const char bc_program_ready_msg[] = "ready for more input\n";
	/*
	* *****************************************************************************
	*
	* Copyright 2018 Gavin D. Howard
	*
	* Permission to use, copy, modify, and/or distribute this software for any
	* purpose with or without fee is hereby granted.
	*
	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
	* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
	* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
	* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
	* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
	* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
	* PERFORMANCE OF THIS SOFTWARE.
	*
	* *****************************************************************************
	*
	* Constant data for bc.
	*
	*/

	#include <lex.h>
	#include <parse.h>
	#include <bc.h>
	#include <num.h>

	#ifdef BC_ENABLED
	// Exclude start.
	const char bc_name[] = "bc";
	// Exclude end.
	const char bc_sig_msg[] = "\ninterrupt (type \"quit\" to exit)\n";
	#endif // BC_ENABLED

	#ifdef DC_ENABLED
	const char dc_name[] = "dc";
	const char dc_sig_msg[] = "\ninturrupt (type \"q\" to exit)\n";
	#endif // DC_ENABLED

	const char bc_copyright[] =
	"Copyright (c) 2018 Gavin D. Howard and contributors\n"
	"Report bugs at: https://github.com/gavinhoward/bc\n\n"
	"This is free software with ABSOLUTELY NO WARRANTY.\n";

	const char bc_err_fmt[] = "\n%s error: %s\n";
	const char bc_err_line[] = ":%zu\n\n";

	const char *bc_errs[] = {
	"VM",
	"Lex",
	"Parse",
	"Math",
	"Runtime",
	"POSIX",
	};

	const uint8_t bc_err_indices[] = {
	BC_ERR_IDX_VM, BC_ERR_IDX_VM, BC_ERR_IDX_VM, BC_ERR_IDX_VM,
	BC_ERR_IDX_LEX, BC_ERR_IDX_LEX, BC_ERR_IDX_LEX, BC_ERR_IDX_LEX,
	#ifdef DC_ENABLED
	BC_ERR_IDX_LEX,
	#endif // DC_ENABLED
	BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE,
	BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE, BC_ERR_IDX_PARSE,
	BC_ERR_IDX_MATH, BC_ERR_IDX_MATH, BC_ERR_IDX_MATH, BC_ERR_IDX_MATH,
	BC_ERR_IDX_MATH, BC_ERR_IDX_MATH,
	#ifdef DC_ENABLED
	BC_ERR_IDX_MATH,
	#endif // DC_ENABLED
	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
	BC_ERR_IDX_EXEC, BC_ERR_IDX_EXEC,
	BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX,
	BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX,
	BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX, BC_ERR_IDX_POSIX,
	BC_ERR_IDX_VEC, BC_ERR_IDX_VEC,
	BC_ERR_IDX_VM, BC_ERR_IDX_VM, BC_ERR_IDX_VM,
	};

	const char *bc_err_descs[] = {

	NULL,
	"memory allocation error",
	"I/O error",
	"file is not text:",

	"bad character",
	"string end could not be found",
	"comment end could not be found",
	"end of file",
	#ifdef DC_ENABLED
	"extended register",
	#endif // DC_ENABLED

	"bad token",
	"bad expression",
	"empty expression",
	"bad print statement",
	"bad function definition",
	"bad assignment: left side must be scale, ibase, "
	"obase, last, var, or array element",
	"no auto variable found",
	"function parameter or auto var has the same name as another",
	"block end could not be found",

	"negative number",
	"non integer number",
	"overflow",
	"divide by zero",
	"negative square root",
	"bad number string",
	#ifdef DC_ENABLED
	"modulus overflowed base",
	#endif // DC_ENABLED

	"could not open file:",
	"mismatched parameters",
	"undefined function",
	"file is not executable:",
	"could not install signal handler",
	"bad scale; must be [0, BC_SCALE_MAX]",
	"bad ibase; must be [2, 16]",
	"bad obase; must be [2, BC_BASE_MAX]",
	"number too long: must be [1, BC_NUM_MAX]",
	"name too long: must be [1, BC_NAME_MAX]",
	"string too long: must be [1, BC_STRING_MAX]",
	"array too long; must be [1, BC_DIM_MAX]",
	"bad read() expression",
	"read() call inside of a read() call",
	"variable is wrong type",
	"signal caught",
	"stack has too few elements",

	"POSIX only allows one character names; the following is bad:",
	"POSIX does not allow '#' script comments",
	"POSIX does not allow the following keyword:",
	"POSIX does not allow a period ('.') as a shortcut for the last result",
	"POSIX requires parentheses around return expressions",
	"POSIX does not allow boolean operators; the following is bad:",
	"POSIX does not allow comparison operators outside if or loops",
	"POSIX requires exactly one comparison operator per condition",
	"POSIX does not allow an empty init expression in a for loop",
	"POSIX does not allow an empty condition expression in a for loop",
	"POSIX does not allow an empty update expression in a for loop",
	"POSIX requires the left brace be on the same line as the function header",

	"index is out of bounds",
	"item already exists",

	#ifndef NDEBUG
	"quit request not honored",
	"limits request not honored",
	#endif // NDEBUG

	};

	const char bc_func_main[] = "(main)";
	const char bc_func_read[] = "(read)";

	#ifndef NDEBUG
	const char bc_inst_chars[] =
	"edED_^*/%+-=;?~<>!\|&`{}@[],NVMACaI.LlrOqpQsSJjPR$HovxzcZdfghkK";
	#endif // NDEBUG

	#ifdef BC_ENABLED
	const BcLexKeyword bc_lex_kws[20] = {
	BC_LEX_KW_ENTRY("auto", 4, true),
	BC_LEX_KW_ENTRY("break", 5, true),
	BC_LEX_KW_ENTRY("continue", 8, false),
	BC_LEX_KW_ENTRY("define", 6, true),
	BC_LEX_KW_ENTRY("else", 4, false),
	BC_LEX_KW_ENTRY("for", 3, true),
	BC_LEX_KW_ENTRY("halt", 4, false),
	BC_LEX_KW_ENTRY("ibase", 5, true),
	BC_LEX_KW_ENTRY("if", 2, true),
	BC_LEX_KW_ENTRY("last", 4, false),
	BC_LEX_KW_ENTRY("length", 6, true),
	BC_LEX_KW_ENTRY("limits", 6, false),
	BC_LEX_KW_ENTRY("obase", 5, true),
	BC_LEX_KW_ENTRY("print", 5, false),
	BC_LEX_KW_ENTRY("quit", 4, true),
	BC_LEX_KW_ENTRY("read", 4, false),
	BC_LEX_KW_ENTRY("return", 6, true),
	BC_LEX_KW_ENTRY("scale", 5, true),
	BC_LEX_KW_ENTRY("sqrt", 4, true),
	BC_LEX_KW_ENTRY("while", 5, true),
	};

	// This is an array that corresponds to token types. An entry is
	// true if the token is valid in an expression, false otherwise.
	const bool bc_parse_exprs[] = {
	false, false, true, true, true, true, true, true, true, true, true, true,
	true, true, true, true, true, true, true, true, true, true, true, true,
	true, true, true, false, false, true, true, false, false, false, false,
	false, false, false, true, true, false, false, false, false, false, false,
	false, true, false, true, true, true, true, false, false, true, false, true,
	true, false,
	};

	// This is an array of data for operators that correspond to token types.
	const BcOp bc_parse_ops[] = {
	{ 0, false }, { 0, false },
	{ 1, false },
	{ 2, false },
	{ 3, true }, { 3, true }, { 3, true },
	{ 4, true }, { 4, true },
	{ 6, true }, { 6, true }, { 6, true }, { 6, true }, { 6, true }, { 6, true },
	{ 1, false },
	{ 7, true }, { 7, true },
	{ 5, false }, { 5, false }, { 5, false }, { 5, false }, { 5, false },
	{ 5, false }, { 5, false },
	};

	// These identify what tokens can come after expressions in certain cases.
	const BcParseNext bc_parse_next_expr =
	BC_PARSE_NEXT(3, BC_LEX_NLINE, BC_LEX_SCOLON, BC_LEX_RBRACE);
	const BcParseNext bc_parse_next_param =
	BC_PARSE_NEXT(2, BC_LEX_RPAREN, BC_LEX_COMMA);
	const BcParseNext bc_parse_next_print =
	BC_PARSE_NEXT(3, BC_LEX_COMMA, BC_LEX_NLINE, BC_LEX_SCOLON);
	const BcParseNext bc_parse_next_cond = BC_PARSE_NEXT(1, BC_LEX_RPAREN);
	const BcParseNext bc_parse_next_elem = BC_PARSE_NEXT(1, BC_LEX_RBRACKET);
	const BcParseNext bc_parse_next_for = BC_PARSE_NEXT(1, BC_LEX_SCOLON);
	#endif // BC_ENABLED

	// This one is needed for dc too.
	const BcParseNext bc_parse_next_read = BC_PARSE_NEXT(1, BC_LEX_NLINE);

	#ifdef DC_ENABLED
	const uint8_t dc_inst_noperands[] = {
	1, 1, 1, 1, 1,
	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
	1, 2, 2, 2, 2, 2, 2, 2, 2, 2,
	0, 0, 1, 0, 0,
	1, 0, 0, 0, 1, 0, 0, 1,
	1, 1, 0, 1, 0, 1, 1, 1, 0, 0,
	3, 2, 1, 0, 0, 0, 1, 2, 0, 1, 0, 1,
	};

	const uint8_t dc_inst_nresults[] = {
	1, 1, 1, 1, 1,
	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	1, 1, 1, 1, 0,
	1, 1, 1, 1, 1, 1, 1, 1,
	1, 0, 1, 0, 0, 1, 0, 1, 1, 0,
	1, 2, 0, 0, 0, 1, 2, 2, 1, 0, 0, 0,
	};

	const BcLexType dc_lex_regs[] = {
	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_SCOLON, BC_LEX_COLON,
	BC_LEX_ELSE, BC_LEX_LOAD, BC_LEX_LOAD_POP, BC_LEX_STORE,BC_LEX_STORE_PUSH,
	};

	const size_t dc_lex_regs_len = sizeof(dc_lex_regs) / sizeof(BcLexType);

	const BcLexType dc_lex_tokens[] = {
	BC_LEX_OP_MODULUS, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_LPAREN,
	BC_LEX_INVALID, BC_LEX_OP_MULTIPLY, BC_LEX_OP_PLUS, BC_LEX_INVALID,
	BC_LEX_OP_MINUS, BC_LEX_INVALID, BC_LEX_OP_DIVIDE,
	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_COLON, BC_LEX_SCOLON, BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_KEY_READ, BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_ELSE,
	BC_LEX_INVALID, BC_LEX_EQ_NO_REG, BC_LEX_INVALID, BC_LEX_KEY_IBASE,
	BC_LEX_INVALID, BC_LEX_KEY_SCALE, BC_LEX_LOAD, BC_LEX_INVALID,
	BC_LEX_OP_BOOL_NOT, BC_LEX_KEY_OBASE, BC_LEX_PRINT_POP, BC_LEX_NQUIT,
	BC_LEX_POP, BC_LEX_STORE, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_SCALE_FACTOR, BC_LEX_INVALID, BC_LEX_KEY_LENGTH,
	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_OP_POWER,
	BC_LEX_NEG, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_INVALID, BC_LEX_CLEAR_STACK, BC_LEX_DUPLICATE,
	BC_LEX_INVALID, BC_LEX_PRINT_STACK, BC_LEX_INVALID, BC_LEX_INVALID,
	BC_LEX_STORE_IBASE, BC_LEX_INVALID, BC_LEX_STORE_SCALE, BC_LEX_LOAD_POP,
	BC_LEX_INVALID, BC_LEX_PRINT_POP, BC_LEX_STORE_OBASE, BC_LEX_KEY_PRINT,
	BC_LEX_KEY_QUIT, BC_LEX_SWAP, BC_LEX_STORE_PUSH, BC_LEX_INVALID,
	BC_LEX_INVALID, BC_LEX_KEY_SQRT, BC_LEX_INVALID, BC_LEX_EXECUTE,
	BC_LEX_INVALID, BC_LEX_STACK_LEVEL,
	BC_LEX_LBRACE, BC_LEX_OP_MODEXP, BC_LEX_INVALID, BC_LEX_OP_DIVMOD,
	BC_LEX_INVALID
	};

	const BcInst dc_parse_insts[] = {
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
	BC_INST_INVALID, BC_INST_POWER, BC_INST_MULTIPLY, BC_INST_DIVIDE,
	BC_INST_MODULUS, BC_INST_PLUS, BC_INST_MINUS,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_BOOL_NOT, BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_ASSIGN,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GT, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_REL_GE,
	BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_STR, BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_IBASE,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_LENGTH, BC_INST_INVALID,
	BC_INST_OBASE, BC_INST_PRINT, BC_INST_QUIT, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_SCALE, BC_INST_SQRT, BC_INST_INVALID,
	BC_INST_REL_EQ, BC_INST_MODEXP, BC_INST_DIVMOD, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_EXECUTE, BC_INST_PRINT_STACK, BC_INST_CLEAR_STACK,
	BC_INST_STACK_LEN, BC_INST_DUPLICATE, BC_INST_SWAP, BC_INST_POP,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID,
	BC_INST_INVALID, BC_INST_INVALID, BC_INST_INVALID, BC_INST_PRINT,
	BC_INST_INVALID, BC_INST_NQUIT, BC_INST_SCALE_FUNC,
	};
	#endif // DC_ENABLED

	const char bc_num_hex_digits[] = "0123456789ABCDEF";

	const BcNumBinaryOp bc_program_ops[] = {
	bc_num_pow, bc_num_mul, bc_num_div, bc_num_rem, bc_num_add, bc_num_sub,
	};

	const char bc_program_stdin_name[] = "<stdin>";
	const char bc_program_ready_msg[] = "ready for more input\n";