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strUtils
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strUtils
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--[[
Copyright (C) 2012 Thomas Farr a.k.a tomass1996 [[email protected]]
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and
associated documentation files (the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
copies of the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
-Visible credit is given to the original author.
-The software is distributed in a non-profit way.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--]]
local floor,modf, insert = math.floor,math.modf, table.insert
local char,format,rep = string.char,string.format,string.rep
local function basen(n,b)
if n < 0 then
n = -n
end
local t = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcdefghijklmnopqrstuvwxyz{|}~"
if n < b then
local ret = ""
ret = ret..string.sub(t, (n%b)+1,(n%b)+1)
return ret
else
local tob = tostring(basen(math.floor(n/b), b))
local ret = tob..t:sub((n%b)+1,(n%b)+1)
return ret
end
end
local Base64 = {}
Base64["lsh"] = function(value,shift)
return (value*(2^shift)) % 256
end
Base64["rsh"] = function(value,shift)
return math.floor(value/2^shift) % 256
end
Base64["bit"] = function(x,b)
return (x % 2^b - x % 2^(b-1) > 0)
end
Base64["lor"] = function(x,y)
local result = 0
for p=1,8 do result = result + (((Base64.bit(x,p) or Base64.bit(y,p)) == true) and 2^(p-1) or 0) end
return result
end
Base64["base64chars"] = {
[0]='A',[1]='B',[2]='C',[3]='D',[4]='E',[5]='F',[6]='G',[7]='H',[8]='I',[9]='J',[10]='K',
[11]='L',[12]='M',[13]='N',[14]='O',[15]='P',[16]='Q',[17]='R',[18]='S',[19]='T',[20]='U',
[21]='V',[22]='W',[23]='X',[24]='Y',[25]='Z',[26]='a',[27]='b',[28]='c',[29]='d',[30]='e',
[31]='f',[32]='g',[33]='h',[34]='i',[35]='j',[36]='k',[37]='l',[38]='m',[39]='n',[40]='o',
[41]='p',[42]='q',[43]='r',[44]='s',[45]='t',[46]='u',[47]='v',[48]='w',[49]='x',[50]='y',
[51]='z',[52]='0',[53]='1',[54]='2',[55]='3',[56]='4',[57]='5',[58]='6',[59]='7',[60]='8',
[61]='9',[62]='-',[63]='_'}
Base64["base64bytes"] = {
['A']=0,['B']=1,['C']=2,['D']=3,['E']=4,['F']=5,['G']=6,['H']=7,['I']=8,['J']=9,['K']=10,
['L']=11,['M']=12,['N']=13,['O']=14,['P']=15,['Q']=16,['R']=17,['S']=18,['T']=19,['U']=20,
['V']=21,['W']=22,['X']=23,['Y']=24,['Z']=25,['a']=26,['b']=27,['c']=28,['d']=29,['e']=30,
['f']=31,['g']=32,['h']=33,['i']=34,['j']=35,['k']=36,['l']=37,['m']=38,['n']=39,['o']=40,
['p']=41,['q']=42,['r']=43,['s']=44,['t']=45,['u']=46,['v']=47,['w']=48,['x']=49,['y']=50,
['z']=51,['0']=52,['1']=53,['2']=54,['3']=55,['4']=56,['5']=57,['6']=58,['7']=59,['8']=60,
['9']=61,['-']=62,['_']=63,['=']=nil}
local base32 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567"
local tSHA1 = {}
tSHA1["bytes_to_w32"] = function(a,b,c,d) return a*0x1000000+b*0x10000+c*0x100+d end
tSHA1["w32_to_bytes"] = function(i) return floor(i/0x1000000)%0x100,floor(i/0x10000)%0x100,floor(i/0x100)%0x100,i%0x100 end
tSHA1["w32_rot"] = function(bits,a)
local b2 = 2^(32-bits)
local a,b = modf(a/b2)
return a+b*b2*(2^(bits))
end
tSHA1["byte_to_bits"] = function(b)
local b = function (n)
local b = floor(b/n)
return b%2==1
end
return b(1),b(2),b(4),b(8),b(16),b(32),b(64),b(128)
end
tSHA1["bits_to_byte"] = function(a,b,c,d,e,f,g,h)
local function n(b,x) return b and x or 0 end
return n(a,1)+n(b,2)+n(c,4)+n(d,8)+n(e,16)+n(f,32)+n(g,64)+n(h,128)
end
tSHA1["bits_to_string"] = function(a,b,c,d,e,f,g,h)
local function x(b) return b and "1" or "0" end
return ("%s%s%s%s %s%s%s%s"):format(x(a),x(b),x(c),x(d),x(e),x(f),x(g),x(h))
end
tSHA1["byte_to_bit_string"] = function(b) return tSHA1.bits_to_string(byte_to_bits(b)) end
tSHA1["w32_to_bit_string"] = function(a)
if type(a) == "string" then return a end
local aa,ab,ac,ad = tSHA1.w32_to_bytes(a)
local s = tSHA1.byte_to_bit_string
return ("%s %s %s %s"):format(s(aa):reverse(),s(ab):reverse(),s(ac):reverse(),s(ad):reverse()):reverse()
end
tSHA1["band"] = function(a,b)
local A,B,C,D,E,F,G,H = tSHA1.byte_to_bits(b)
local a,b,c,d,e,f,g,h = tSHA1.byte_to_bits(a)
return tSHA1.bits_to_byte(
A and a, B and b, C and c, D and d,
E and e, F and f, G and g, H and h)
end
tSHA1["bor"] = function(a,b)
local A,B,C,D,E,F,G,H = tSHA1.byte_to_bits(b)
local a,b,c,d,e,f,g,h = tSHA1.byte_to_bits(a)
return tSHA1.bits_to_byte(
A or a, B or b, C or c, D or d,
E or e, F or f, G or g, H or h)
end
tSHA1["bxor"] = function(a,b)
local A,B,C,D,E,F,G,H = tSHA1.byte_to_bits(b)
local a,b,c,d,e,f,g,h = tSHA1.byte_to_bits(a)
return tSHA1.bits_to_byte(
A ~= a, B ~= b, C ~= c, D ~= d,
E ~= e, F ~= f, G ~= g, H ~= h)
end
tSHA1["bnot"] = function(x) return 255-(x % 256) end
tSHA1["w32_comb"] = function(fn)
return function (a,b)
local aa,ab,ac,ad = tSHA1.w32_to_bytes(a)
local ba,bb,bc,bd = tSHA1.w32_to_bytes(b)
return tSHA1.bytes_to_w32(fn(aa,ba),fn(ab,bb),fn(ac,bc),fn(ad,bd))
end
end
tSHA1["w32_xor_n"] = function(a,...)
local aa,ab,ac,ad = tSHA1.w32_to_bytes(a)
for i=1,select('#',...) do
local ba,bb,bc,bd = tSHA1.w32_to_bytes(select(i,...))
aa,ab,ac,ad = tSHA1.bxor(aa,ba),tSHA1.bxor(ab,bb),tSHA1.bxor(ac,bc),tSHA1.bxor(ad,bd)
end
return tSHA1.bytes_to_w32(aa,ab,ac,ad)
end
tSHA1["w32_or3"] = function(a,b,c)
local aa,ab,ac,ad = tSHA1.w32_to_bytes(a)
local ba,bb,bc,bd = tSHA1.w32_to_bytes(b)
local ca,cb,cc,cd = tSHA1.w32_to_bytes(c)
return tSHA1.bytes_to_w32(
tSHA1.bor(aa,tSHA1.bor(ba,ca)), tSHA1.bor(ab,tSHA1.bor(bb,cb)), tSHA1.bor(ac,tSHA1.bor(bc,cc)), tSHA1.bor(ad,tSHA1.bor(bd,cd))
)
end
tSHA1["w32_not"] = function(a) return 4294967295-(a % 4294967296) end
tSHA1["w32_add"] = function(a,b) return (a+b) % 4294967296 end
tSHA1["w32_add_n"] = function(a,...)
for i=1,select('#',...) do
a = (a+select(i,...)) % 4294967296
end
return a
end
tSHA1["w32_to_hexstring"] = function(w) return format("%08x",w) end
tSHA1["w32_and"] = tSHA1.w32_comb(tSHA1.band)
tSHA1["w32_xor"] = tSHA1.w32_comb(tSHA1.bxor)
tSHA1["w32_or"] = tSHA1.w32_comb(tSHA1.bor)
local CRC = {}
CRC.crc32 = {
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D }
local bit = {}
bit["bnot"] = function(n)
local tbl = bit.tobits(n)
local size = math.max(table.getn(tbl), 32)
for i = 1, size do
if(tbl[i] == 1) then
tbl[i] = 0
else
tbl[i] = 1
end
end
return bit.tonumb(tbl)
end
bit["band"] = function(m, n)
local tbl_m = bit.tobits(m)
local tbl_n = bit.tobits(n)
bit.expand(tbl_m, tbl_n)
local tbl = {}
local rslt = math.max(table.getn(tbl_m), table.getn(tbl_n))
for i = 1, rslt do
if(tbl_m[i]== 0 or tbl_n[i] == 0) then
tbl[i] = 0
else
tbl[i] = 1
end
end
return bit.tonumb(tbl)
end
bit["bor"] = function(m, n)
local tbl_m = bit.tobits(m)
local tbl_n = bit.tobits(n)
bit.expand(tbl_m, tbl_n)
local tbl = {}
local rslt = math.max(table.getn(tbl_m), table.getn(tbl_n))
for i = 1, rslt do
if(tbl_m[i]== 0 and tbl_n[i] == 0) then
tbl[i] = 0
else
tbl[i] = 1
end
end
return bit.tonumb(tbl)
end
bit["bxor"] = function(m, n)
local tbl_m = bit.tobits(m)
local tbl_n = bit.tobits(n)
bit.expand(tbl_m, tbl_n)
local tbl = {}
local rslt = math.max(table.getn(tbl_m), table.getn(tbl_n))
for i = 1, rslt do
if(tbl_m[i] ~= tbl_n[i]) then
tbl[i] = 1
else
tbl[i] = 0
end
end
return bit.tonumb(tbl)
end
bit["brshift"] = function(n, bits)
bit.checkint(n)
local high_bit = 0
if(n < 0) then
n = bit.bnot(math.abs(n)) + 1
high_bit = 2147483648
end
for i=1, bits do
n = n/2
n = bit.bor(math.floor(n), high_bit)
end
return math.floor(n)
end
bit["blshift"] = function(n, bits)
bit.checkint(n)
if(n < 0) then
n = bit.bnot(math.abs(n)) + 1
end
for i=1, bits do
n = n*2
end
return bit.band(n, 4294967295)
end
bit["bxor2"] = function(m, n)
local rhs = bit.bor(bit.bnot(m), bit.bnot(n))
local lhs = bit.bor(m, n)
local rslt = bit.band(lhs, rhs)
return rslt
end
bit["blogic_rshift"] = function(n, bits)
bit.checkint(n)
if(n < 0) then
n = bit.bnot(math.abs(n)) + 1
end
for i=1, bits do
n = n/2
end
return math.floor(n)
end
bit["tobits"] = function(n)
bit.checkint(n)
if(n < 0) then
return bit.tobits(bit.bnot(math.abs(n)) + 1)
end
local tbl = {}
local cnt = 1
while (n > 0) do
local last = math.fmod(n,2)
if(last == 1) then
tbl[cnt] = 1
else
tbl[cnt] = 0
end
n = (n-last)/2
cnt = cnt + 1
end
return tbl
end
bit["tonumb"] = function(tbl)
local n = table.getn(tbl)
local rslt = 0
local power = 1
for i = 1, n do
rslt = rslt + tbl[i]*power
power = power*2
end
return rslt
end
bit["checkint"] = function(n)
if(n - math.floor(n) > 0) then
error("trying to use bitwise operation on non-integer!")
end
end
bit["expand"] = function(tbl_m, tbl_n)
local big = {}
local small = {}
if(table.getn(tbl_m) > table.getn(tbl_n)) then
big = tbl_m
small = tbl_n
else
big = tbl_n
small = tbl_m
end
for i = table.getn(small) + 1, table.getn(big) do
small[i] = 0
end
end
local FCS = {}
FCS["16"] = {
[0]=0, 4489, 8978, 12955, 17956, 22445, 25910, 29887,
35912, 40385, 44890, 48851, 51820, 56293, 59774, 63735,
4225, 264, 13203, 8730, 22181, 18220, 30135, 25662,
40137, 36160, 49115, 44626, 56045, 52068, 63999, 59510,
8450, 12427, 528, 5017, 26406, 30383, 17460, 21949,
44362, 48323, 36440, 40913, 60270, 64231, 51324, 55797,
12675, 8202, 4753, 792, 30631, 26158, 21685, 17724,
48587, 44098, 40665, 36688, 64495, 60006, 55549, 51572,
16900, 21389, 24854, 28831, 1056, 5545, 10034, 14011,
52812, 57285, 60766, 64727, 34920, 39393, 43898, 47859,
21125, 17164, 29079, 24606, 5281, 1320, 14259, 9786,
57037, 53060, 64991, 60502, 39145, 35168, 48123, 43634,
25350, 29327, 16404, 20893, 9506, 13483, 1584, 6073,
61262, 65223, 52316, 56789, 43370, 47331, 35448, 39921,
29575, 25102, 20629, 16668, 13731, 9258, 5809, 1848,
65487, 60998, 56541, 52564, 47595, 43106, 39673, 35696,
33800, 38273, 42778, 46739, 49708, 54181, 57662, 61623,
2112, 6601, 11090, 15067, 20068, 24557, 28022, 31999,
38025, 34048, 47003, 42514, 53933, 49956, 61887, 57398,
6337, 2376, 15315, 10842, 24293, 20332, 32247, 27774,
42250, 46211, 34328, 38801, 58158, 62119, 49212, 53685,
10562, 14539, 2640, 7129, 28518, 32495, 19572, 24061,
46475, 41986, 38553, 34576, 62383, 57894, 53437, 49460,
14787, 10314, 6865, 2904, 32743, 28270, 23797, 19836,
50700, 55173, 58654, 62615, 32808, 37281, 41786, 45747,
19012, 23501, 26966, 30943, 3168, 7657, 12146, 16123,
54925, 50948, 62879, 58390, 37033, 33056, 46011, 41522,
23237, 19276, 31191, 26718, 7393, 3432, 16371, 11898,
59150, 63111, 50204, 54677, 41258, 45219, 33336, 37809,
27462, 31439, 18516, 23005, 11618, 15595, 3696, 8185,
63375, 58886, 54429, 50452, 45483, 40994, 37561, 33584,
31687, 27214, 22741, 18780, 15843, 11370, 7921, 3960 }
FCS["32"] = {
[0]=0, 1996959894, -301047508, -1727442502, 124634137, 1886057615, -379345611, -1637575261,
249268274, 2044508324, -522852066, -1747789432, 162941995, 2125561021, -407360249, -1866523247,
498536548, 1789927666, -205950648, -2067906082, 450548861, 1843258603, -187386543, -2083289657,
325883990, 1684777152, -43845254, -1973040660, 335633487, 1661365465, -99664541, -1928851979,
997073096, 1281953886, -715111964, -1570279054, 1006888145, 1258607687, -770865667, -1526024853,
901097722, 1119000684, -608450090, -1396901568, 853044451, 1172266101, -589951537, -1412350631,
651767980, 1373503546, -925412992, -1076862698, 565507253, 1454621731, -809855591, -1195530993,
671266974, 1594198024, -972236366, -1324619484, 795835527, 1483230225, -1050600021, -1234817731,
1994146192, 31158534, -1731059524, -271249366, 1907459465, 112637215, -1614814043, -390540237,
2013776290, 251722036, -1777751922, -519137256, 2137656763, 141376813, -1855689577, -429695999,
1802195444, 476864866, -2056965928, -228458418, 1812370925, 453092731, -2113342271, -183516073,
1706088902, 314042704, -1950435094, -54949764, 1658658271, 366619977, -1932296973, -69972891,
1303535960, 984961486, -1547960204, -725929758, 1256170817, 1037604311, -1529756563, -740887301,
1131014506, 879679996, -1385723834, -631195440, 1141124467, 855842277, -1442165665, -586318647,
1342533948, 654459306, -1106571248, -921952122, 1466479909, 544179635, -1184443383, -832445281,
1591671054, 702138776, -1328506846, -942167884, 1504918807, 783551873, -1212326853, -1061524307,
-306674912, -1698712650, 62317068, 1957810842, -355121351, -1647151185, 81470997, 1943803523,
-480048366, -1805370492, 225274430, 2053790376, -468791541, -1828061283, 167816743, 2097651377,
-267414716, -2029476910, 503444072, 1762050814, -144550051, -2140837941, 426522225, 1852507879,
-19653770, -1982649376, 282753626, 1742555852, -105259153, -1900089351, 397917763, 1622183637,
-690576408, -1580100738, 953729732, 1340076626, -776247311, -1497606297, 1068828381, 1219638859,
-670225446, -1358292148, 906185462, 1090812512, -547295293, -1469587627, 829329135, 1181335161,
-882789492, -1134132454, 628085408, 1382605366, -871598187, -1156888829, 570562233, 1426400815,
-977650754, -1296233688, 733239954, 1555261956, -1026031705, -1244606671, 752459403, 1541320221,
-1687895376, -328994266, 1969922972, 40735498, -1677130071, -351390145, 1913087877, 83908371,
-1782625662, -491226604, 2075208622, 213261112, -1831694693, -438977011, 2094854071, 198958881,
-2032938284, -237706686, 1759359992, 534414190, -2118248755, -155638181, 1873836001, 414664567,
-2012718362, -15766928, 1711684554, 285281116, -1889165569, -127750551, 1634467795, 376229701,
-1609899400, -686959890, 1308918612, 956543938, -1486412191, -799009033, 1231636301, 1047427035,
-1362007478, -640263460, 1088359270, 936918000, -1447252397, -558129467, 1202900863, 817233897,
-1111625188, -893730166, 1404277552, 615818150, -1160759803, -841546093, 1423857449, 601450431,
-1285129682, -1000256840, 1567103746, 711928724, -1274298825, -1022587231, 1510334235, 755167117 }
--String Utils :
function toCharTable(str) --Returns table of @str's chars
if not str then return nil end
str = tostring(str)
local chars = {}
for n=1,#str do
chars[n] = str:sub(n,n)
end
return chars
end
function toByteTable(str) --Returns table of @str's bytes
if not str then return nil end
str = tostring(str)
local bytes = {}
for n=1,#str do
bytes[n] = str:byte(n)
end
return bytes
end
function fromCharTable(chars) --Returns string made of chracters in @chars
if not chars or type(chars)~="table" then return nil end
return table.concat(chars)
end
function fromByteTable(bytes) --Returns string made of bytes in @bytes
if not bytes or type(bytes)~="table" then return nil end
local str = ""
for n=1,#bytes do
str = str..string.char(bytes[n])
end
return str
end
function contains(str,find) --Returns true if @str contains @find
if not str then return nil end
str = tostring(str)
for n=1, #str-#find+1 do
if str:sub(n,n+#find-1) == find then return true end
end
return false
end
function startsWith(str,Start) --Check if @str starts with @Start
if not str then return nil end
str = tostring(str)
return str:sub(1,Start:len())==Start
end
function endsWith(str,End) --Check if @str ends with @End
if not str then return nil end
str = tostring(str)
return End=='' or str:sub(#str-#End+1)==End
end
function trim(str) --Trim @str of initial/trailing whitespace
if not str then return nil end
str = tostring(str)
return (str:gsub("^%s*(.-)%s*$", "%1"))
end
function firstLetterUpper(str) --Capitilizes first letter of @str
if not str then return nil end
str = tostring(str)
str = str:gsub("%a", string.upper, 1)
return str
end
function titleCase(str) --Changes @str to title case
if not str then return nil end
str = tostring(str)
local function tchelper(first, rest)
return first:upper()..rest:lower()
end
str = str:gsub("(%a)([%w_']*)", tchelper)
return str
end
function isRepetition(str, pat) --Checks if @str is a repetition of @pat
if not str then return nil end
str = tostring(str)
return "" == str:gsub(pat, "")
end
function isRepetitionWS(str, pat) --Checks if @str is a repetition of @pat seperated by whitespaces
if not str then return nil end
str = tostring(str)
return not str:gsub(pat, ""):find"%S"
end
function urlDecode(str) --Url decodes @str
if not str then return nil end
str = tostring(str)
str = string.gsub (str, "+", " ")
str = string.gsub (str, "%%(%x%x)", function(h) return string.char(tonumber(h,16)) end)
str = string.gsub (str, "\r\n", "\n")
return str
end
function urlEncode(str) --Url encodes @str
if not str then return nil end
str = tostring(str)
if (str) then
str = string.gsub (str, "\n", "\r\n")
str = string.gsub (str, "([^%w ])", function (c) return string.format ("%%%02X", string.byte(c)) end)
str = string.gsub (str, " ", "+")
end
return str
end
function isEmailAddress(str) --Checks if @str is a valid email address
if not str then return nil end
str = tostring(str)
if (str:match("[A-Za-z0-9%.%%%+%-]+@[A-Za-z0-9%.%%%+%-]+%.%w%w%w?%w?")) then
return true
else
return false
end
end
function chunk(str, size) --Splits @str into chunks of length @size
if not size then return nil end
str = tostring(str)
local num2App = size - (#str%size)
str = str..(rep(char(0), num2App) or "")
assert(#str%size==0)
local chunks = {}
local numChunks = #str / size
local chunk = 0
while chunk < numChunks do
local start = chunk * size + 1
chunk = chunk+1
if start+size-1 > #str-num2App then
if str:sub(start, #str-num2App) ~= (nil or "") then
chunks[chunk] = str:sub(start, #str-num2App)
end
else
chunks[chunk] = str:sub(start, start+size-1)
end
end
return chunks
end
function find(str, match, startIndex) --Finds @match in @str optionally after @startIndex
if not match then return nil end
str = tostring(str)
local _ = startIndex or 1
local _s = nil
local _e = nil
local _len = match:len()
while true do
local _t = str:sub( _ , _len + _ - 1)
if _t == match then
_s = _
_e = _ + _len - 1
break
end
_ = _ + 1
if _ > str:len() then break end
end
if _s == nil then return nil else return _s, _e end
end
function seperate(str, divider) --Separates @str on @divider
if not divider then return nil end
str = tostring(str)
local start = {}
local endS = {}
local n=1
repeat
if n==1 then
start[n], endS[n] = find(str, divider)
else
start[n], endS[n] = find(str, divider, endS[n-1]+1)
end
n=n+1
until start[n-1]==nil
local subs = {}
for n=1, #start+1 do
if n==1 then
subs[n] = str:sub(1, start[n]-1)
elseif n==#start+1 then
subs[n] = str:sub(endS[n-1]+1)
else
subs[n] = str:sub(endS[n-1]+1, start[n]-1)
end
end
return subs
end
function replace(str, from, to) --Replaces @from to @to in @str
if not from then return nil end
str = tostring(str)
local pcs = seperate(str, from)
str = pcs[1]
for n=2,#pcs do
str = str..to..pcs[n]
end
return str
end
function jumble(str) --Jumbles @str
if not str then return nil end
str = tostring(str)
local chars = {}
for i = 1, #str do
chars[i] = str:sub(i, i)
end
local usedNums = ":"
local res = ""
local rand = 0
for i=1, #chars do
while true do
rand = math.random(#chars)
if find(usedNums, ":"..rand..":") == nil then break end
end
res = res..chars[rand]
usedNums = usedNums..rand..":"
end
return res
end
function toBase(str, base) --Encodes @str in @base
if not base then return nil end
str = tostring(str)
local res = ""
for i = 1, str:len() do
if i == 1 then
res = basen(str:byte(i), base)
else
res = res..":"..basen(str:byte(i), base)
end
end
return res
end
function fromBase(str, base) --Decodes @str from @base
if not base then return nil end
str = tostring(str)
local bytes = seperate(str, ":")
local res = ""
for i = 1, #bytes do
res = res..(string.char(basen(tonumber(bytes[i], base), 10)))
end
return res
end
function toBinary(str) --Encodes @str in binary
if not str then return nil end
str = tostring(str)
return toBase(str, 2)
end
function fromBinary(str) --Decodes @str from binary
if not str then return nil end
str = tostring(str)
return fromBase(str, 2)
end
function toOctal(str) --Encodes @str in octal
if not str then return nil end
str = tostring(str)
return toBase(str, 8)
end
function fromOctal(str) --Decodes @str from octal
if not str then return nil end
str = tostring(str)
return fromBase(str, 8)
end
function toHex(str) --Encodes @str in hex
if not str then return nil end
str = tostring(str)
return toBase(str, 16)
end
function fromHex(str) --Decodes @str from hex
if not str then return nil end
str = tostring(str)
return fromBase(str, 16)
end
function toBase36(str) --Encodes @str in Base36
if not str then return nil end
str = tostring(str)
return toBase(str, 36)
end
function fromBase36(str) --Decodes @str from Base36
if not str then return nil end
str = tostring(str)
return fromBase(str, 36)
end
function toBase32(str) --Encodes @str in Base32
if not str then return nil end
str = tostring(str)
local byte=0
local bits=0
local rez=""
local i=0
for i = 1, str:len() do
byte=byte*256+str:byte(i)
bits=bits+8
repeat
bits=bits-5
local mul=(2^(bits))
local b32n=math.floor(byte/mul)
byte=byte-(b32n*mul)
b32n=b32n+1
rez=rez..string.sub(base32,b32n,b32n)
until bits<5
end
if bits>0 then
local b32n= math.fmod(byte*(2^(5-bits)),32)
b32n=b32n+1
rez=rez..string.sub(base32,b32n,b32n)
end
return rez
end
function fromBase32(str) --Decodes @str from Base32
if not str then return nil end
str = tostring(str)
local b32n=0
local bits=0
local rez=""
local i=0
string.gsub(str:upper(), "["..base32.."]", function (char)
local num = string.find(base32, char, 1, true)
b32n=b32n*32+(num - 1)
bits=bits+5
while bits>=8 do
bits=bits-8
local mul=(2^(bits))
local byte = math.floor(b32n/mul)
b32n=b32n-(byte*mul)
rez=rez..string.char(byte)
end
end)
return rez
end
function toBase64(str) --Encodes @str in Base64
if not str then return nil end
str = tostring(str)
local bytes = {}
local result = ""
for spos=0,str:len()-1,3 do
for byte=1,3 do bytes[byte] = str:byte(spos+byte) or 0 end
result = string.format('%s%s%s%s%s',result,Base64.base64chars[Base64.rsh(bytes[1],2)],Base64.base64chars[Base64.lor(Base64.lsh((bytes[1] % 4),4), Base64.rsh(bytes[2],4))] or "=",((str:len()-spos) > 1) and Base64.base64chars[Base64.lor(Base64.lsh(bytes[2] % 16,2), Base64.rsh(bytes[3],6))] or "=",((str:len()-spos) > 2) and Base64.base64chars[(bytes[3] % 64)] or "=")
end
return result
end
function fromBase64(str) --Decodes @str from Base64
if not str then return nil end
str = tostring(str)
local chars = {}
local result=""
for dpos=0,str:len()-1,4 do
for char=1,4 do chars[char] = Base64.base64bytes[(str:sub((dpos+char),(dpos+char)) or "=")] end
result = string.format('%s%s%s%s',result,string.char(Base64.lor(Base64.lsh(chars[1],2), Base64.rsh(chars[2],4))),(chars[3] ~= nil) and string.char(Base64.lor(Base64.lsh(chars[2],4), Base64.rsh(chars[3],2))) or "",(chars[4] ~= nil) and string.char(Base64.lor(Base64.lsh(chars[3],6) % 192, (chars[4]))) or "")
end
return result
end
function rot13(str) --Rot13s @str
if not str then return nil end
str = tostring(str)
local rot = ""
local len = str:len()
for i = 1, len do
local k = str:byte(i)
if (k >= 65 and k <= 77) or (k >= 97 and k <=109) then
rot = rot..string.char(k+13)
elseif (k >= 78 and k <= 90) or (k >= 110 and k <= 122) then
rot = rot..string.char(k-13)
else
rot = rot..string.char(k)
end
end
return rot
end
function rot47(str) --Rot47s @str
if not str then return nil end
str = tostring(str)
local rot = ""
for i = 1, str:len() do
local p = str:byte(i)
if p >= string.byte('!') and p <= string.byte('O') then
p = ((p + 47) % 127)
elseif p >= string.byte('P') and p <= string.byte('~') then
p = ((p - 47) % 127)
end
rot = rot..string.char(p)
end
return rot
end
function SHA1(str) --Returns SHA1 Hash of @str
if not str then return nil end
str = tostring(str)
local H0,H1,H2,H3,H4 = 0x67452301,0xEFCDAB89,0x98BADCFE,0x10325476,0xC3D2E1F0
local msg_len_in_bits = #str * 8
local first_append = char(0x80)
local non_zero_message_bytes = #str +1 +8
local current_mod = non_zero_message_bytes % 64
local second_append = current_mod>0 and rep(char(0), 64 - current_mod) or ""
local B1, R1 = modf(msg_len_in_bits / 0x01000000)
local B2, R2 = modf( 0x01000000 * R1 / 0x00010000)
local B3, R3 = modf( 0x00010000 * R2 / 0x00000100)
local B4 = 0x00000100 * R3
local L64 = char( 0) .. char( 0) .. char( 0) .. char( 0)
.. char(B1) .. char(B2) .. char(B3) .. char(B4)
str = str .. first_append .. second_append .. L64
assert(#str % 64 == 0)
local chunks = #str / 64
local W = { }
local start, A, B, C, D, E, f, K, TEMP
local chunk = 0
while chunk < chunks do
start,chunk = chunk * 64 + 1,chunk + 1
for t = 0, 15 do
W[t] = tSHA1.bytes_to_w32(str:byte(start, start + 3))
start = start + 4
end
for t = 16, 79 do
W[t] = tSHA1.w32_rot(1, tSHA1.w32_xor_n(W[t-3], W[t-8], W[t-14], W[t-16]))
end
A,B,C,D,E = H0,H1,H2,H3,H4
for t = 0, 79 do
if t <= 19 then
f = tSHA1.w32_or(tSHA1.w32_and(B, C), tSHA1.w32_and(tSHA1.w32_not(B), D))
K = 0x5A827999
elseif t <= 39 then
f = tSHA1.w32_xor_n(B, C, D)
K = 0x6ED9EBA1
elseif t <= 59 then
f = tSHA1.w32_or3(tSHA1.w32_and(B, C), tSHA1.w32_and(B, D), tSHA1.w32_and(C, D))
K = 0x8F1BBCDC
else
f = tSHA1.w32_xor_n(B, C, D)
K = 0xCA62C1D6
end
A,B,C,D,E = tSHA1.w32_add_n(tSHA1.w32_rot(5, A), f, E, W[t], K),
A, tSHA1.w32_rot(30, B), C, D
end
H0,H1,H2,H3,H4 = tSHA1.w32_add(H0, A),tSHA1.w32_add(H1, B),tSHA1.w32_add(H2, C),tSHA1.w32_add(H3, D),tSHA1.w32_add(H4, E)
end
local f = tSHA1.w32_to_hexstring
return f(H0) .. f(H1) .. f(H2) .. f(H3) .. f(H4)
end
function CRC32(str) --Returns CRC32 Hash of @str
local crc, l, i = 0xFFFFFFFF, string.len(str)
for i = 1, l, 1 do
crc = bit.bxor(bit.brshift(crc, 8), CRC.crc32[bit.band(bit.bxor(crc, string.byte(str, i)), 0xFF) + 1])
end
return bit.bxor(crc, -1)
end
function FCS16(str) --Returns FCS16 Hash of @str
local i
local l=string.len(str)
local uFcs16 = 65535
for i = 1,l do
uFcs16 = bit.bxor(bit.brshift(uFcs16,8), FCS["16"][bit.band(bit.bxor(uFcs16, string.byte(str,i)), 255)])
end
return bit.bxor(uFcs16, 65535)
end
function FCS32(str) --Returns FCS32 Hash of @str
local i
local l = string.len(str)
local uFcs32 = -1
for i=1,l do
uFcs32 = bit.bxor(bit.brshift(uFcs32,8), FCS["32"][bit.band(bit.bxor(uFcs32, string.byte(str,i)), 255)])
end
return bit.bnot(uFcs32)
end
function encrypt(str, key) --Encrypts @str with @key
if not key then return nil end
str = tostring(str)
local alphabet = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_abcdefghijklmnopqrstuvwxyz{|}~"
local _rand = math.random(#alphabet-10)
local iv = string.sub(jumble(alphabet), _rand, _rand + 9)
iv = jumble(iv)
str = iv..str
local key = SHA1(key)
local strLen = str:len()
local keyLen = key:len()
local j=1
local result = ""
for i=1, strLen do
local ordStr = string.byte(str:sub(i,i))
if j == keyLen then j=1 end
local ordKey = string.byte(key:sub(j,j))
result = result..string.reverse(basen(ordStr+ordKey, 36))
j = j+1
end
return result
end
function decrypt(str, key) --Decrypts @str with @key
if not key then return nil end
str = tostring(str)
local key = SHA1(key)
local strLen = str:len()
local keyLen = key:len()
local j=1
local result = ""
for i=1, strLen, 2 do
local ordStr = basen(tonumber(string.reverse(str:sub(i, i+1)),36),10)
if j==keyLen then j=1 end
local ordKey = string.byte(key:sub(j,j))
result = result..string.char(ordStr-ordKey)
j = j+1
end
return result:sub(11)
end
function setRandSeed(seed) --Sets random seed to @seed
math.randomseed(seed)
end
--[[
function Test()
local br = "\n----------\n"
setRandSeed(os.time())
local logFile = io.open("StrUtilTest.log", "w")
logFile:write(br)
logFile:write("toCharTable(\"Hello\")".."\n")
local ct = toCharTable("Hello")
for k,v in pairs(ct) do logFile:write(k.."-"..v.."\n") end
logFile:write(br)
logFile:write("fromCharTable()".."\n")
logFile:write(fromCharTable(ct).."\n")
logFile:write(br)
logFile:write("toByteTable(\"Hello\")".."\n")
local bt = toByteTable("Hello")
for k,v in pairs(bt) do logFile:write(k.."-"..v.."\n") end
logFile:write(br)
logFile:write("fromByteTable()".."\n")
logFile:write(fromByteTable(bt).."\n")
logFile:write(br)
logFile:write("contains(\"Hello\", \"Hell\")".."\n")
logFile:write(tostring(contains("Hello", "Hell")).."\n")
logFile:write(br)
logFile:write("startsWith(\"Hello\", \"H\")".."\n")
logFile:write(tostring(startsWith("Hello", "H")).."\n")
logFile:write(br)
logFile:write("endsWith(\"Hello\", \"o\")".."\n")
logFile:write(tostring(endsWith("Hello", "o")).."\n")
logFile:write(br)
logFile:write("trim(\" Hello \")".."\n")
logFile:write(trim(" Hello ").."\n")
logFile:write(br)
logFile:write("firstLetterUpper(\"hello\")".."\n")
logFile:write(firstLetterUpper("hello").."\n")
logFile:write(br)
logFile:write("titleCase(\"hello world, how are you\")".."\n")
logFile:write(titleCase("hello world, how are you").."\n")
logFile:write(br)
logFile:write("isRepetition(\"HelloHelloHello\", \"Hello\")".."\n")
logFile:write(tostring(isRepetition("HelloHelloHello", "Hello")).."\n")
logFile:write(br)
logFile:write("isRepetitionWS(\"Hello Hello Hello\", \"Hello\")".."\n")
logFile:write(tostring(isRepetitionWS("Hello Hello Hello", "Hello")).."\n")
logFile:write(br)
logFile:write("urlEncode(\"Hello There World\")".."\n")
local US = urlEncode("Hello There World")
logFile:write(US.."\n")
logFile:write(br)
logFile:write("urlDecode()".."\n")