shithub: rgbds

ref: 19c85a7c2e2063f2d42cff9a5b1a8ce0c660c61e
dir: /include/asm/warning.h/

/*
 * This file is part of RGBDS.
 *
 * Copyright (c) 2019, Eldred Habert and RGBDS contributors.
 *
 * SPDX-License-Identifier: MIT
 */

#ifndef WARNING_H
#define WARNING_H

#include "helpers.h"

extern unsigned int nbErrors;

enum WarningState {
	WARNING_DEFAULT,
	WARNING_DISABLED,
	WARNING_ENABLED,
	WARNING_ERROR
};

enum WarningID {
	WARNING_ASSERT,		      // Assertions
	WARNING_BACKWARDS_FOR,	      // `for` loop with backwards range
	WARNING_BUILTIN_ARG,	      // Invalid args to builtins
	WARNING_CHARMAP_REDEF,        // Charmap entry re-definition
	WARNING_DIV,		      // Division undefined behavior
	WARNING_EMPTY_DATA_DIRECTIVE, // `db`, `dw` or `dl` directive without data in ROM
	WARNING_EMPTY_MACRO_ARG,      // Empty macro argument
	WARNING_EMPTY_STRRPL,	      // Empty second argument in `STRRPL`
	WARNING_LARGE_CONSTANT,	      // Constants too large
	WARNING_LONG_STR,	      // String too long for internal buffers
	WARNING_MACRO_SHIFT,	      // Shift past available arguments in macro
	WARNING_NESTED_COMMENT,	      // Comment-start delimiter in a block comment
	WARNING_OBSOLETE,	      // Obsolete things
	WARNING_SHIFT,		      // Shifting undefined behavior
	WARNING_SHIFT_AMOUNT,	      // Strange shift amount
	WARNING_USER,		      // User warnings

	NB_PLAIN_WARNINGS,

	// Warnings past this point are "parametric" warnings, only mapping to a single flag
#define PARAM_WARNINGS_START NB_PLAIN_WARNINGS
	// Treating string as number may lose some bits
	WARNING_NUMERIC_STRING_1 = PARAM_WARNINGS_START,
	WARNING_NUMERIC_STRING_2,
	// Implicit truncation loses some bits
	WARNING_TRUNCATION_1,
	WARNING_TRUNCATION_2,

	NB_PLAIN_AND_PARAM_WARNINGS,
#define NB_PARAM_WARNINGS (NB_PLAIN_AND_PARAM_WARNINGS - PARAM_WARNINGS_START)

	// Warnings past this point are "meta" warnings
#define META_WARNINGS_START NB_PLAIN_AND_PARAM_WARNINGS
	WARNING_ALL = META_WARNINGS_START,
	WARNING_EXTRA,
	WARNING_EVERYTHING,

	NB_WARNINGS,
#define NB_META_WARNINGS (NB_WARNINGS - META_WARNINGS_START)
};

extern enum WarningState warningStates[NB_PLAIN_AND_PARAM_WARNINGS];
extern bool warningsAreErrors;

void processWarningFlag(char *flag);

/*
 * Used to warn the user about problems that don't prevent the generation of
 * valid code.
 */
void warning(enum WarningID id, char const *fmt, ...) format_(printf, 2, 3);

/*
 * Used for errors that compromise the whole assembly process by affecting the
 * following code, potencially making the assembler generate errors caused by
 * the first one and unrelated to the code that the assembler complains about.
 * It is also used when the assembler goes into an invalid state (for example,
 * when it fails to allocate memory).
 */
_Noreturn void fatalerror(char const *fmt, ...) format_(printf, 1, 2);

/*
 * Used for errors that make it impossible to assemble correctly, but don't
 * affect the following code. The code will fail to assemble but the user will
 * get a list of all errors at the end, making it easier to fix all of them at
 * once.
 */
void error(char const *fmt, ...) format_(printf, 1, 2);

#endif