NAME

       scan_ulong - parse an unsigned long integer in decimal ASCII representation

SYNTAX

       #include <scan.h>

       size_t scan_ulong(const char *src,unsigned long *dest);

DESCRIPTION

       scan_ulong  parses  an  unsigned long integer in decimal ASCII representation from src and
       writes the result into dest. It returns the number of bytes read from src.

       Leading + or - or  space  (or  anything  outside  of  0-9)  is  not  accepted.   The  libc
       conventions of "023" for octal or "0x23" for hexadecimal are not supported.

       scan_ulong  will  abort the scan if the next character is not a digit, or if it is a digit
       but adding it to the number would lead to an integer overflow.

RETURN VALUE

       scan_ulong returns the number of characters successfully scanned and processed from src.

EXAMPLES

       scan_ulong("23",&i) -> i=23, return 2

       scan_ulong("+23",&i) -> return 0

       scan_ulong("-23",&i) -> return 0

       scan_ulong(" 23",&i) -> return 0

       scan_ulong("23,42",&i) -> i=23, return 2

       scan_ulong("023",&i) -> i=23, return 3

       scan_ulong("0x23",&i) -> i=0, return 1

       scan_ulong("4294967296",&i") -> i=429496729, return 9 // 32-bit system

SEE ALSO

       scan_xlong(3), scan_8long(3), fmt_ulong(3)

                                                                                    scan_ulong(3)