Zilog EZ80F916 - Manual (Page 200)

UM014423-0607 Using the ANSI C-Compiler
ZiLOG Developer Studio II
eZ80Acclaim! ® User Manual
180
251 Can't preprocess format to (s)printf
This message is generated when the format parameter to
printf
or
sprintf
is not a
string literal and the inline generation of
printf
calls is requested. For example, the
following code causes this warning:
static char msg1 = " x = %4d " ;
char buff[sizeof(msg1)+4];
sprintf(buff,msg1,x);
// WARNING HERE
This warning is generated because the line of code is processed by the real
printf
or
sprintf
function, so that the primary goal of the inline processing, reducing the code
size by removing these functions, is not met.
When this message is displayed, you have three options:
–
Deselect the Generate Printfs Inline check box (see “Project Settings—Code
Generation Page” on page 61) so that all calls to
printf
and
sprintf
are
handled by the real
printf
or
sprintf
functions.
– Recode to pass a string literal. For example, the code in the example can be
revised as follows:
define MSG1 "x = %4d"
char buff[sizeof(MSG1)+4];
sprintf(buff,MSG1,x); // OK
– Keep the Generate Printfs Inline check box selected and ignore the warning. This
loses the primary goal of the option but results in the faster execution of the calls
to
printf
or
sprintf
that can be processed at compile time, a secondary goal of
the option.
252 Bad format string passed to (s)printf
This warning occurs when the compiler is unable to parse the string literal format and
the inline generation of
printf
calls is requested. A normal call to
printf
or
sprintf
is generated (which might also be unable to parse the format).
253 Too few parameters for (s)printf format
This error is generated when there are fewer parameters to a call to
printf
or
sprintf
than the format string calls for and the inline generation of
printf
calls is
requested. For example:
printf( " x = %4d\n " );
254 Too many parameters for (s)printf format
This warning is generated when there are more parameters to a call to
printf
or
sprintf
than the format string calls for and the inline generation of
printf
calls is
requested. For example:
printf( " x = %4d\n " , x, y);
The format string is parsed, and the extra arguments are ignored.