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📄 assert.awk(383 B)
📄 bits2str.awk(334 B)
📄 cliff_rand.awk(307 B)
📄 ctime.awk(234 B)
📄 ftrans.awk(315 B)
📄 getopt.awk(2.15 KB)
📄 gettime.awk(2.43 KB)
📄 group.awk(1.72 KB)
📄 have_mpfr.awk(221 B)
📄 inplace.awk(1.95 KB)
📄 intdiv0.awk(462 B)
📄 join.awk(378 B)
📄 libintl.awk(238 B)
📄 noassign.awk(422 B)
📄 ord.awk(937 B)
📄 passwd.awk(1.17 KB)
📄 processarray.awk(355 B)
📄 quicksort.awk(1.01 KB)
📄 readable.awk(489 B)
📄 readfile.awk(267 B)
📄 rewind.awk(404 B)
📄 round.awk(661 B)
📄 shellquote.awk(472 B)
📄 strtonum.awk(1.42 KB)
📄 walkarray.awk(214 B)
📄 zerofile.awk(424 B)

Editing: strtonum.awk

# mystrtonum --- convert string to number

#
# Arnold Robbins, arnold@skeeve.com, Public Domain
# February, 2004
# Revised June, 2014

function mystrtonum(str,        ret, n, i, k, c)
{
    if (str ~ /^0[0-7]*$/) {
        # octal
        n = length(str)
        ret = 0
        for (i = 1; i <= n; i++) {
            c = substr(str, i, 1)
            # index() returns 0 if c not in string,
            # includes c == "0"
            k = index("1234567", c)

ret = ret * 8 + k
        }
    } else if (str ~ /^0[xX][[:xdigit:]]+$/) {
        # hexadecimal
        str = substr(str, 3)    # lop off leading 0x
        n = length(str)
        ret = 0
        for (i = 1; i <= n; i++) {
            c = substr(str, i, 1)
            c = tolower(c)
            # index() returns 0 if c not in string,
            # includes c == "0"
            k = index("123456789abcdef", c)

ret = ret * 16 + k
        }
    } else if (str ~ \
  /^[-+]?([0-9]+([.][0-9]*([Ee][0-9]+)?)?|([.][0-9]+([Ee][-+]?[0-9]+)?))$/) {
        # decimal number, possibly floating point
        ret = str + 0
    } else
        ret = "NOT-A-NUMBER"

return ret
}

# BEGIN {     # gawk test harness
#     a[1] = "25"
#     a[2] = ".31"
#     a[3] = "0123"
#     a[4] = "0xdeadBEEF"
#     a[5] = "123.45"
#     a[6] = "1.e3"
#     a[7] = "1.32"
#     a[8] = "1.32E2"
#
#     for (i = 1; i in a; i++)
#         print a[i], strtonum(a[i]), mystrtonum(a[i])
# }

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Editing: strtonum.awk

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