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// Copyright © Tavian Barnes <tavianator@tavianator.com>
// SPDX-License-Identifier: 0BSD
/**
* Diagnostic messages.
*/
#ifndef BFS_DIAG_H
#define BFS_DIAG_H
#include "prelude.h"
#include <stdarg.h>
/**
* static_assert() with an optional second argument.
*/
#if __STDC_VERSION__ >= C23
# define bfs_static_assert static_assert
#else
# define bfs_static_assert(...) bfs_static_assert_(__VA_ARGS__, #__VA_ARGS__, )
# define bfs_static_assert_(expr, msg, ...) _Static_assert(expr, msg)
#endif
/**
* A source code location.
*/
struct bfs_loc {
const char *file;
int line;
const char *func;
};
#define BFS_LOC_INIT { .file = __FILE__, .line = __LINE__, .func = __func__ }
/**
* Get the current source code location.
*/
#if __STDC_VERSION__ >= C23
# define bfs_location() (&(static const struct bfs_loc)BFS_LOC_INIT)
#else
# define bfs_location() (&(const struct bfs_loc)BFS_LOC_INIT)
#endif
/**
* Print a low-level diagnostic message to standard error, formatted like
*
* bfs: func@src/file.c:0: Message
*/
attr(printf(2, 3))
void bfs_diagf(const struct bfs_loc *loc, const char *format, ...);
/**
* Unconditional diagnostic message.
*/
#define bfs_diag(...) bfs_diagf(bfs_location(), __VA_ARGS__)
/**
* Get the last error message.
*/
const char *bfs_errstr(void);
/**
* Print a diagnostic message including the last error.
*/
#define bfs_ediag(...) \
bfs_ediag_("" __VA_ARGS__, bfs_errstr())
#define bfs_ediag_(format, ...) \
bfs_diag(sizeof(format) > 1 ? format ": %s" : "%s", __VA_ARGS__)
/**
* Print a message to standard error and abort.
*/
attr(cold, printf(2, 3))
noreturn void bfs_abortf(const struct bfs_loc *loc, const char *format, ...);
/**
* Unconditional abort with a message.
*/
#define bfs_abort(...) \
bfs_abortf(bfs_location(), __VA_ARGS__)
/**
* Abort with a message including the last error.
*/
#define bfs_eabort(...) \
bfs_eabort_("" __VA_ARGS__, bfs_errstr())
#define bfs_eabort_(format, ...) \
bfs_abort(sizeof(format) > 1 ? format ": %s" : "%s", __VA_ARGS__)
/**
* Abort in debug builds; no-op in release builds.
*/
#ifdef NDEBUG
# define bfs_bug(...) ((void)0)
# define bfs_ebug(...) ((void)0)
#else
# define bfs_bug bfs_abort
# define bfs_ebug bfs_eabort
#endif
/**
* Unconditional assert.
*/
#define bfs_verify(...) \
bfs_verify_(#__VA_ARGS__, __VA_ARGS__, "", "")
#define bfs_verify_(str, cond, format, ...) \
((cond) ? (void)0 : bfs_abort( \
sizeof(format) > 1 \
? "%.0s" format "%s%s" \
: "Assertion failed: `%s`%s", \
str, __VA_ARGS__))
/**
* Unconditional assert, including the last error.
*/
#define bfs_everify(...) \
bfs_everify_(#__VA_ARGS__, __VA_ARGS__, "", bfs_errstr())
#define bfs_everify_(str, cond, format, ...) \
((cond) ? (void)0 : bfs_abort( \
sizeof(format) > 1 \
? "%.0s" format "%s: %s" \
: "Assertion failed: `%s`: %s", \
str, __VA_ARGS__))
/**
* Assert in debug builds; no-op in release builds.
*/
#ifdef NDEBUG
# define bfs_assert(...) ((void)0)
# define bfs_eassert(...) ((void)0)
#else
# define bfs_assert bfs_verify
# define bfs_eassert bfs_everify
#endif
struct bfs_ctx;
struct bfs_expr;
/**
* Various debugging flags.
*/
enum debug_flags {
/** Print cost estimates. */
DEBUG_COST = 1 << 0,
/** Print executed command details. */
DEBUG_EXEC = 1 << 1,
/** Print optimization details. */
DEBUG_OPT = 1 << 2,
/** Print rate information. */
DEBUG_RATES = 1 << 3,
/** Trace the filesystem traversal. */
DEBUG_SEARCH = 1 << 4,
/** Trace all stat() calls. */
DEBUG_STAT = 1 << 5,
/** Print the parse tree. */
DEBUG_TREE = 1 << 6,
/** All debug flags. */
DEBUG_ALL = (1 << 7) - 1,
};
/**
* Convert a debug flag to a string.
*/
const char *debug_flag_name(enum debug_flags flag);
/**
* Like perror(), but decorated like bfs_error().
*/
attr(cold)
void bfs_perror(const struct bfs_ctx *ctx, const char *str);
/**
* Shorthand for printing error messages.
*/
attr(cold, printf(2, 3))
void bfs_error(const struct bfs_ctx *ctx, const char *format, ...);
/**
* Shorthand for printing warning messages.
*
* @return Whether a warning was printed.
*/
attr(cold, printf(2, 3))
bool bfs_warning(const struct bfs_ctx *ctx, const char *format, ...);
/**
* Shorthand for printing debug messages.
*
* @return Whether a debug message was printed.
*/
attr(cold, printf(3, 4))
bool bfs_debug(const struct bfs_ctx *ctx, enum debug_flags flag, const char *format, ...);
/**
* bfs_error() variant that takes a va_list.
*/
attr(cold, printf(2, 0))
void bfs_verror(const struct bfs_ctx *ctx, const char *format, va_list args);
/**
* bfs_warning() variant that takes a va_list.
*/
attr(cold, printf(2, 0))
bool bfs_vwarning(const struct bfs_ctx *ctx, const char *format, va_list args);
/**
* bfs_debug() variant that takes a va_list.
*/
attr(cold, printf(3, 0))
bool bfs_vdebug(const struct bfs_ctx *ctx, enum debug_flags flag, const char *format, va_list args);
/**
* Print the error message prefix.
*/
attr(cold)
void bfs_error_prefix(const struct bfs_ctx *ctx);
/**
* Print the warning message prefix.
*/
attr(cold)
bool bfs_warning_prefix(const struct bfs_ctx *ctx);
/**
* Print the debug message prefix.
*/
attr(cold)
bool bfs_debug_prefix(const struct bfs_ctx *ctx, enum debug_flags flag);
/**
* Highlight parts of the command line in an error message.
*/
attr(cold)
void bfs_argv_error(const struct bfs_ctx *ctx, const bool args[]);
/**
* Highlight parts of an expression in an error message.
*/
attr(cold)
void bfs_expr_error(const struct bfs_ctx *ctx, const struct bfs_expr *expr);
/**
* Highlight parts of the command line in a warning message.
*/
attr(cold)
bool bfs_argv_warning(const struct bfs_ctx *ctx, const bool args[]);
/**
* Highlight parts of an expression in a warning message.
*/
attr(cold)
bool bfs_expr_warning(const struct bfs_ctx *ctx, const struct bfs_expr *expr);
#endif // BFS_DIAG_H
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