strtoimax, strtoumax — convert string to integer


#include <inttypes.h>

intmax_t strtoimax(const char *nptr, char **endptr, int base);
uintmax_t strtoumax(const char *nptr, char **endptr, int base);


These functions are just like strtol(3) and strtoul(3), except that they return a value of type intmax_t and uintmax_t, respectively.

Return Value

On success, the converted value is returned. If nothing was found to convert, zero is returned. On overflow or underflow INTMAX_MAX or INTMAX_MIN or UINTMAX_MAX is returned, and errno is set to ERANGE.


For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
strtoimax(), strtoumax() Thread safety MT-Safe locale

Conforming to

POSIX.1-2001, POSIX.1-2008, C99.

See Also

imaxabs(3), imaxdiv(3), strtol(3), strtoul(3), wcstoimax(3)


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Referenced By

strtoi.3bsd(3), strtol(3), strtou.3bsd(3), strtoul(3), wcstoimax(3).

The man page strtoumax(3) is an alias of strtoimax(3).

2015-08-08 Linux Programmer's Manual