Advanced UNIX Programming

BSD strtoq(3) and strtouq(3) Functions

BSD is a little different in its large integer conversions. FreeBSD supports its strtoq(3) and strtouq(3) functional equivalents of the strtoll(3) and strtoull(3) functions. The 64-bit C data types that FreeBSD uses are

Signed 64-bit	quad_t
Unsigned 64-bit	u_quad_t

The function synopsis of the conversion routines for these data types is as follows:

#include <sys/types.h>
#include <stdlib.h>
#include <limits.h>

quad_t strtoq(const char *nptr, char **endptr, int base);

u_quad_t strtouq(const char *nptr, char **endptr, int base);

The C macros that you should use with strtoq(3) are QUAD_MAX and QUAD_MIN, when testing for overflow and underflow, respectively. For strtouq(3), you must use the C macro UQUAD_MAX ...