NAME

xprintf – formatted output conversion

SYNOPSIS

#include <sys.h>

void xprintf( const char *format , … );

DESCRIPTION

xprintf() formats its arg s and calls xputchar() to output the results. It is a simplified version of printf() ment mainly for debugging or logging purposes.

The format is a character string which contains two types of objects: plain characters, which are simply passed to xputchar(), and conversion specifications, each of which causes conversion and printing of zero or more arg s. The results are undefined if there are insufficient arg s for the format. If the format is exhausted while arg s remain, the excess arg s are simply ignored.

Each conversion specification is introduced by the % character. After the % the following may appear:

c

The character arg is printed.

d

The integer arg is converted to signed decimal.

s

The arg is taken to be a string (character pointer) and characters from the string are printed until a NULL character (0) is encountered. A NULL value for arg will yield undefined results.

u

The integer arg is converted to unsigned decimal.

x

The integer arg is converted to unsigned hexadecimal. The %x conversion specification produces a fixed format 10 character string. The string is always prefixed by 0x and the number is zero padded to 8 characters. For example, 42 would be display as 0x0000002A.

SEE ALSO

xputchar(), xputs()