| 0,0 → 1,76 |
|---|
| /* |
| FUNCTION |
| <<assert>>---macro for debugging diagnostics |
| |
| INDEX |
| assert |
| |
| ANSI_SYNOPSIS |
| #include <assert.h> |
| void assert(int <[expression]>); |
| |
| DESCRIPTION |
| Use this macro to embed debuggging diagnostic statements in |
| your programs. The argument <[expression]> should be an |
| expression which evaluates to true (nonzero) when your program |
| is working as you intended. |
| |
| When <[expression]> evaluates to false (zero), <<assert>> |
| calls <<abort>>, after first printing a message showing what |
| failed and where: |
| |
| . Assertion failed: <[expression]>, file <[filename]>, line <[lineno]>, function: <[func]> |
| |
| If the name of the current function is not known (for example, |
| when using a C89 compiler that does not understand __func__), |
| the function location is omitted. |
| |
| The macro is defined to permit you to turn off all uses of |
| <<assert>> at compile time by defining <<NDEBUG>> as a |
| preprocessor variable. If you do this, the <<assert>> macro |
| expands to |
| |
| . (void(0)) |
| |
| RETURNS |
| <<assert>> does not return a value. |
| |
| PORTABILITY |
| The <<assert>> macro is required by ANSI, as is the behavior |
| when <<NDEBUG>> is defined. |
| |
| Supporting OS subroutines required (only if enabled): <<close>>, <<fstat>>, |
| <<getpid>>, <<isatty>>, <<kill>>, <<lseek>>, <<read>>, <<sbrk>>, <<write>>. |
| */ |
| |
| #include <assert.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| |
| #ifndef HAVE_ASSERT_FUNC |
| /* func can be NULL, in which case no function information is given. */ |
| void |
| _DEFUN (__assert_func, (file, line, func, failedexpr), |
| const char *file _AND |
| int line _AND |
| const char *func _AND |
| const char *failedexpr) |
| { |
| fiprintf(stderr, |
| "assertion \"%s\" failed: file \"%s\", line %d%s%s\n", |
| failedexpr, file, line, |
| func ? ", function: " : "", func ? func : ""); |
| abort(); |
| /* NOTREACHED */ |
| } |
| #endif /* HAVE_ASSERT_FUNC */ |
| |
| void |
| _DEFUN (__assert, (file, line, failedexpr), |
| const char *file _AND |
| int line _AND |
| const char *failedexpr) |
| { |
| __assert_func (file, line, NULL, failedexpr); |
| /* NOTREACHED */ |
| } |