diff options
| author | Manuel Novoa III <mjn3@codepoet.org> | 2002-10-28 21:29:21 +0000 |
|---|---|---|
| committer | Manuel Novoa III <mjn3@codepoet.org> | 2002-10-28 21:29:21 +0000 |
| commit | b7df7e6da8876ee40e61d457e2e37523e380aad7 (patch) | |
| tree | ec4c17307d441153d623e1b5bd4f0e0420afe37e /libc/misc/assert | |
| parent | 6072ec712b72521d7a13a22b6d9ccf6127c8c005 (diff) | |
ANSI/ISO C99 requires assert() to write to stderr. This means that
writing to STDERR_FILENO is insufficient, as the user could freopen
stderr. It is also insufficient to output to fileno(stderr) since
this would fail in the custom stream case. I didn't remove the
old code though, as it doesn't use stdio stream functionality
and is useful in debugging the stdio code.
Diffstat (limited to 'libc/misc/assert')
| -rw-r--r-- | libc/misc/assert/__assert.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/libc/misc/assert/__assert.c b/libc/misc/assert/__assert.c index db5f9a7a9..efffff1de 100644 --- a/libc/misc/assert/__assert.c +++ b/libc/misc/assert/__assert.c @@ -17,6 +17,16 @@ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ +/* Oct 28, 2002 + * + * ANSI/ISO C99 requires assert() to write to stderr. This means that + * writing to STDERR_FILENO is insufficient, as the user could freopen + * stderr. It is also insufficient to output to fileno(stderr) since + * this would fail in the custom stream case. I didn't remove the + * old code though, as it doesn't use stdio stream functionality + * and is useful in debugging the stdio code. + */ + #define _STDIO_UTILITY /* For _stdio_fdout and _int10tostr. */ #include <stdio.h> #include <stdlib.h> @@ -27,6 +37,29 @@ #include <assert.h> #undef assert +#if 1 + +void __assert(const char *assertion, const char * filename, + int linenumber, register const char * function) +{ + fprintf(stderr, +#if 0 + /* TODO: support program_name like glibc? */ + "%s: %s: %d: %s: Assertion `%s' failed.\n", program_name, +#else + "%s: %d: %s: Assertion `%s' failed.\n", +#endif + filename, + linenumber, + /* Function name isn't available with some compilers. */ + ((function == NULL) ? "?function?" : function), + assertion + ); + abort(); +} + +#else + void __assert(const char *assertion, const char * filename, int linenumber, register const char * function) { @@ -50,3 +83,5 @@ void __assert(const char *assertion, const char * filename, ); abort(); } + +#endif |