Hi,
I'm trying to convert this:
printf("format str %s, %s", "str arg 1", "str arg 2 etc.");
to this:
printf("%s: " "format str %s, %s", __FUNCTION__, "str arg 1", "str arg2
etc.");
All sol'ns I came up had various problems in various printf formats.
The closest I had was something like:
#if DEBUG 0
#define pdebug(fmt ...) printf("%s: " fmt, \
__FUNCTION__, __VA_ARGS__); \
#endif
But this wont work if there's a printf with no va_args, such as:
printf("fmt string and nothing else\n");
because the comma after __FUNCTION__ will be a syntax error.
Any ideas?
Thanks,
Bahadir 5 1911 Bi*************@gmail.com writes:
I'm trying to convert this:
printf("format str %s, %s", "str arg 1", "str arg 2 etc.");
to this:
printf("%s: " "format str %s, %s", __FUNCTION__, "str arg 1", "str arg2
etc.");
It's ghastly, but
#define pdebug printf("%s:", __FUNCTION__), printf
might do what you want.
There are probably C99-specific solutions, and definitely
GCC-specific solutions, as well.
--
Just another C hacker. Bi*************@gmail.com wrote:
Hi,
I'm trying to convert this:
printf("format str %s, %s", "str arg 1", "str arg 2 etc.");
to this:
printf("%s: " "format str %s, %s", __FUNCTION__, "str arg 1", "str arg2
etc.");
All sol'ns I came up had various problems in various printf formats.
The closest I had was something like:
#if DEBUG 0
#define pdebug(fmt ...) printf("%s: " fmt, \
__FUNCTION__, __VA_ARGS__); \
#endif
But this wont work if there's a printf with no va_args, such as:
printf("fmt string and nothing else\n");
because the comma after __FUNCTION__ will be a syntax error.
Any ideas?
#define pdebug(args...) do { \
printf ("%s:", __FUNCTION__); \
printf (args); \
} while (0);
Should do what you want.
Thanks,
Bahadir
Ben Pfaff wrote:
Bi*************@gmail.com writes:
I'm trying to convert this:
printf("format str %s, %s", "str arg 1", "str arg 2 etc.");
to this:
printf("%s: " "format str %s, %s", __FUNCTION__, "str arg 1", "str arg2
etc.");
It's ghastly, but
#define pdebug printf("%s:", __FUNCTION__), printf
might do what you want.
There are probably C99-specific solutions, and definitely
GCC-specific solutions, as well.
I think Ben's solution or a variant of it may be what you want. Your
method of concatenating string literals precludes people from using a
variable as the format string, not ideal if this is to be widely used.
e.g.
const char *format = "%s %d %s";
pdebug(format, foo, bar, bas);
would break.
-David
L7 wrote On 08/31/06 13:58,:
>
#define pdebug(args...) do { \
printf ("%s:", __FUNCTION__); \
printf (args); \
} while (0);
Should do what you want.
Lose the final semicolon.
-- Er*********@sun.com
"L7" <je***********@gmail.comwrites:
#define pdebug(args...) do { \
printf ("%s:", __FUNCTION__); \
printf (args); \
} while (0);
That's GCC-specific.
--
int main(void){char p[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuv wxyz.\
\n",*q="kl BIcNBFr.NKEzjwCIxNJC";int i=sizeof p/2;char *strchr();int putchar(\
);while(*q){i+=strchr(p,*q++)-p;if(i>=(int)sizeof p)i-=sizeof p-1;putchar(p[i]\
);}return 0;} This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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