//Just replace "AAT_Ring_" by your prefix
///////////////////////////////////////////////////////////////////////////////
function integerToString_AAT_Ring(integer x) is string //x = 0..255
Declare

begin

if (x < 128)
begin
if (x < 64)
begin
if (x < 32)
begin
if (x < 16)
begin
if (x < 8)
begin
if (x < 4)
begin
if (x <= 0) return "AAT_Ring_0";
if (x == 1) return "AAT_Ring_1";
if (x == 2) return "AAT_Ring_2";
if (x == 3) return "AAT_Ring_3";
end
else // >= 4
begin
if (x == 4) return "AAT_Ring_4";
if (x == 5) return "AAT_Ring_5";
if (x == 6) return "AAT_Ring_6";
if (x == 7) return "AAT_Ring_7";
end
end
else // >= 8
begin
if (x < 12)
begin
if (x == 8) return "AAT_Ring_8";
if (x == 9) return "AAT_Ring_9";
if (x == 10) return "AAT_Ring_10";
if (x == 11) return "AAT_Ring_11";
end
else // >= 12
begin
if (x == 12) return "AAT_Ring_12";
if (x == 13) return "AAT_Ring_13";
if (x == 14) return "AAT_Ring_14";
if (x == 15) return "AAT_Ring_15";
end
end
end
else // >= 16
begin
if (x < 24)
begin
if (x < 20)
begin
if (x == 16) return "AAT_Ring_16";
if (x == 17) return "AAT_Ring_17";
if (x == 18) return "AAT_Ring_18";
if (x == 19) return "AAT_Ring_19";
end
else // >= 20
begin
if (x == 20) return "AAT_Ring_20";
if (x == 21) return "AAT_Ring_21";
if (x == 22) return "AAT_Ring_22";
if (x == 23) return "AAT_Ring_23";
end
end
else // >= 24
begin
if (x < 28)
begin
if (x == 24) return "AAT_Ring_24";
if (x == 25) return "AAT_Ring_25";
if (x == 26) return "AAT_Ring_26";
if (x == 27) return "AAT_Ring_27";
end
else // >= 28
begin
if (x == 28) return "AAT_Ring_28";
if (x == 29) return "AAT_Ring_29";
if (x == 30) return "AAT_Ring_30";
if (x == 31) return "AAT_Ring_31";
end
end
end
end
else // >= 32
begin
if (x < 48)
begin
if (x < 40)
begin
if (x < 36)
begin
if (x == 32) return "AAT_Ring_32";
if (x == 33) return "AAT_Ring_33";
if (x == 34) return "AAT_Ring_34";
if (x == 35) return "AAT_Ring_35";
end
else // >= 36
begin
if (x == 36) return "AAT_Ring_36";
if (x == 37) return "AAT_Ring_37";
if (x == 38) return "AAT_Ring_38";
if (x == 39) return "AAT_Ring_39";
end
end
else // >= 40
begin
if (x < 44)
begin
if (x == 40) return "AAT_Ring_40";
if (x == 41) return "AAT_Ring_41";
if (x == 42) return "AAT_Ring_42";
if (x == 43) return "AAT_Ring_43";
end
else // >= 44
begin
if (x == 44) return "AAT_Ring_44";
if (x == 45) return "AAT_Ring_45";
if (x == 46) return "AAT_Ring_46";
if (x == 47) return "AAT_Ring_47";
end
end
end
else // >= 48
begin
if (x < 56)
begin
if (x < 52)
begin
if (x == 48) return "AAT_Ring_48";
if (x == 49) return "AAT_Ring_49";
if (x == 50) return "AAT_Ring_50";
if (x == 51) return "AAT_Ring_51";
end
else // >= 52
begin
if (x == 52) return "AAT_Ring_52";
if (x == 53) return "AAT_Ring_53";
if (x == 54) return "AAT_Ring_54";
if (x == 55) return "AAT_Ring_55";
end
end
else // >= 56
begin
if (x < 60)
begin
if (x == 56) return "AAT_Ring_56";
if (x == 57) return "AAT_Ring_57";
if (x == 58) return "AAT_Ring_58";
if (x == 59) return "AAT_Ring_59";
end
else // >= 60
begin
if (x == 60) return "AAT_Ring_60";
if (x == 61) return "AAT_Ring_61";
if (x == 62) return "AAT_Ring_62";
if (x == 63) return "AAT_Ring_63";
end
end
end
end
end
else // >= 64
begin
if (x < 96)
begin
if (x < 80)
begin
if (x < 72)
begin
if (x < 68)
begin
if (x == 64) return "AAT_Ring_64";
if (x == 65) return "AAT_Ring_65";
if (x == 66) return "AAT_Ring_66";
if (x == 67) return "AAT_Ring_67";
end
else // >= 68
begin
if (x == 68) return "AAT_Ring_68";
if (x == 69) return "AAT_Ring_69";
if (x == 70) return "AAT_Ring_70";
if (x == 71) return "AAT_Ring_71";
end
end
else // >= 72
begin
if (x < 76)
begin
if (x == 72) return "AAT_Ring_72";
if (x == 73) return "AAT_Ring_73";
if (x == 74) return "AAT_Ring_74";
if (x == 75) return "AAT_Ring_75";
end
else // >= 76
begin
if (x == 76) return "AAT_Ring_76";
if (x == 77) return "AAT_Ring_77";
if (x == 78) return "AAT_Ring_78";
if (x == 79) return "AAT_Ring_79";
end
end
end
else // >= 72
begin
if (x < 88)
begin
if (x < 84)
begin
if (x == 80) return "AAT_Ring_80";
if (x == 81) return "AAT_Ring_81";
if (x == 82) return "AAT_Ring_82";
if (x == 83) return "AAT_Ring_83";
end
else // >= 84
begin
if (x == 84) return "AAT_Ring_84";
if (x == 85) return "AAT_Ring_85";
if (x == 86) return "AAT_Ring_86";
if (x == 87) return "AAT_Ring_87";
end
end
else // >= 88
begin
if (x < 92)
begin
if (x == 88) return "AAT_Ring_88";
if (x == 89) return "AAT_Ring_89";
if (x == 90) return "AAT_Ring_90";
if (x == 91) return "AAT_Ring_91";
end
else // >= 92
begin
if (x == 92) return "AAT_Ring_92";
if (x == 93) return "AAT_Ring_93";
if (x == 94) return "AAT_Ring_94";
if (x == 95) return "AAT_Ring_95";
end
end
end
end
else // >= 92
begin
if (x < 112)
begin
if (x < 104)
begin
if (x < 100)
begin
if (x == 96) return "AAT_Ring_96";
if (x == 97) return "AAT_Ring_97";
if (x == 98) return "AAT_Ring_98";
if (x == 99) return "AAT_Ring_99";
end
else // >= 100
begin
if (x == 100) return "AAT_Ring_100";
if (x == 101) return "AAT_Ring_101";
if (x == 102) return "AAT_Ring_102";
if (x == 103) return "AAT_Ring_103";
end
end
else // >= 104
begin
if (x < 108)
begin
if (x == 104) return "AAT_Ring_104";
if (x == 105) return "AAT_Ring_105";
if (x == 106) return "AAT_Ring_106";
if (x == 107) return "AAT_Ring_107";
end
else // >= 108
begin
if (x == 108) return "AAT_Ring_108";
if (x == 109) return "AAT_Ring_109";
if (x == 110) return "AAT_Ring_110";
if (x == 111) return "AAT_Ring_111";
end
end
end
else // >= 112
begin
if (x < 120)
begin
if (x < 116)
begin
if (x == 112) return "AAT_Ring_112";
if (x == 113) return "AAT_Ring_113";
if (x == 114) return "AAT_Ring_114";
if (x == 115) return "AAT_Ring_115";
end
else // >= 116
begin
if (x == 116) return "AAT_Ring_116";
if (x == 117) return "AAT_Ring_117";
if (x == 118) return "AAT_Ring_118";
if (x == 119) return "AAT_Ring_119";
end
end
else // >= 120
begin
if (x < 124)
begin
if (x == 120) return "AAT_Ring_120";
if (x == 121) return "AAT_Ring_121";
if (x == 122) return "AAT_Ring_122";
if (x == 123) return "AAT_Ring_123";
end
else // >= 124
begin
if (x == 124) return "AAT_Ring_124";
if (x == 125) return "AAT_Ring_125";
if (x == 126) return "AAT_Ring_126";
if (x == 127) return "AAT_Ring_127";
end
end
end
end
end
end

else // >= 128
begin
if (x < 192)
begin
if (x < 160)
begin
if (x < 144)
begin
if (x < 136)
begin
if (x < 132)
begin
if (x == 128) return "AAT_Ring_128";
if (x == 129) return "AAT_Ring_129";
if (x == 130) return "AAT_Ring_130";
if (x == 131) return "AAT_Ring_131";
end
else // >= 132
begin
if (x == 132) return "AAT_Ring_132";
if (x == 133) return "AAT_Ring_133";
if (x == 134) return "AAT_Ring_134";
if (x == 135) return "AAT_Ring_135";
end
end
else // >= 136
begin
if (x < 140)
begin
if (x == 136) return "AAT_Ring_136";
if (x == 137) return "AAT_Ring_137";
if (x == 138) return "AAT_Ring_138";
if (x == 139) return "AAT_Ring_139";
end
else // >= 140
begin
if (x == 140) return "AAT_Ring_140";
if (x == 141) return "AAT_Ring_141";
if (x == 142) return "AAT_Ring_142";
if (x == 143) return "AAT_Ring_143";
end
end
end
else // >= 144
begin
if (x < 152)
begin
if (x < 148)
begin
if (x == 144) return "AAT_Ring_144";
if (x == 145) return "AAT_Ring_145";
if (x == 146) return "AAT_Ring_146";
if (x == 147) return "AAT_Ring_147";
end
else // >= 148
begin
if (x == 148) return "AAT_Ring_148";
if (x == 149) return "AAT_Ring_149";
if (x == 150) return "AAT_Ring_150";
if (x == 151) return "AAT_Ring_151";
end
end
else // >= 152
begin
if (x < 156)
begin
if (x == 152) return "AAT_Ring_152";
if (x == 153) return "AAT_Ring_153";
if (x == 154) return "AAT_Ring_154";
if (x == 155) return "AAT_Ring_155";
end
else // >= 156
begin
if (x == 156) return "AAT_Ring_156";
if (x == 157) return "AAT_Ring_157";
if (x == 158) return "AAT_Ring_158";
if (x == 159) return "AAT_Ring_159";
end
end
end
end
else // >= 160
begin
if (x < 176)
begin
if (x < 168)
begin
if (x < 164)
begin
if (x == 160) return "AAT_Ring_160";
if (x == 161) return "AAT_Ring_161";
if (x == 162) return "AAT_Ring_162";
if (x == 163) return "AAT_Ring_163";
end
else // >= 164
begin
if (x == 164) return "AAT_Ring_164";
if (x == 165) return "AAT_Ring_165";
if (x == 166) return "AAT_Ring_166";
if (x == 167) return "AAT_Ring_167";
end
end
else // >= 168
begin
if (x < 172)
begin
if (x == 168) return "AAT_Ring_168";
if (x == 169) return "AAT_Ring_169";
if (x == 170) return "AAT_Ring_170";
if (x == 171) return "AAT_Ring_171";
end
else // >= 172
begin
if (x == 172) return "AAT_Ring_172";
if (x == 173) return "AAT_Ring_173";
if (x == 174) return "AAT_Ring_174";
if (x == 175) return "AAT_Ring_175";
end
end
end
else // >= 176
begin
if (x < 184)
begin
if (x < 180)
begin
if (x == 176) return "AAT_Ring_176";
if (x == 177) return "AAT_Ring_177";
if (x == 178) return "AAT_Ring_178";
if (x == 179) return "AAT_Ring_179";
end
else // >= 180
begin
if (x == 180) return "AAT_Ring_180";
if (x == 181) return "AAT_Ring_181";
if (x == 182) return "AAT_Ring_182";
if (x == 183) return "AAT_Ring_183";
end
end
else // >= 184
begin
if (x < 188)
begin
if (x == 184) return "AAT_Ring_184";
if (x == 185) return "AAT_Ring_185";
if (x == 186) return "AAT_Ring_186";
if (x == 187) return "AAT_Ring_187";
end
else // >= 188
begin
if (x == 188) return "AAT_Ring_188";
if (x == 189) return "AAT_Ring_189";
if (x == 190) return "AAT_Ring_190";
if (x == 191) return "AAT_Ring_191";
end
end
end
end
end
else // >= 192
begin
if (x < 224)
begin
if (x < 208)
begin
if (x < 200)
begin
if (x < 196)
begin
if (x == 192) return "AAT_Ring_192";
if (x == 193) return "AAT_Ring_193";
if (x == 194) return "AAT_Ring_194";
if (x == 195) return "AAT_Ring_195";
end
else // >= 196
begin
if (x == 196) return "AAT_Ring_196";
if (x == 197) return "AAT_Ring_197";
if (x == 198) return "AAT_Ring_198";
if (x == 199) return "AAT_Ring_199";
end
end
else // >= 200
begin
if (x < 204)
begin
if (x == 200) return "AAT_Ring_200";
if (x == 201) return "AAT_Ring_201";
if (x == 202) return "AAT_Ring_202";
if (x == 203) return "AAT_Ring_203";
end
else // >= 204
begin
if (x == 204) return "AAT_Ring_204";
if (x == 205) return "AAT_Ring_205";
if (x == 206) return "AAT_Ring_206";
if (x == 207) return "AAT_Ring_207";
end
end
end
else // >= 200
begin
if (x < 216)
begin
if (x < 212)
begin
if (x == 208) return "AAT_Ring_208";
if (x == 209) return "AAT_Ring_209";
if (x == 210) return "AAT_Ring_210";
if (x == 211) return "AAT_Ring_211";
end
else // >= 212
begin
if (x == 212) return "AAT_Ring_212";
if (x == 213) return "AAT_Ring_213";
if (x == 214) return "AAT_Ring_214";
if (x == 215) return "AAT_Ring_215";
end
end
else // >= 216
begin
if (x < 220)
begin
if (x == 216) return "AAT_Ring_216";
if (x == 217) return "AAT_Ring_217";
if (x == 218) return "AAT_Ring_218";
if (x == 219) return "AAT_Ring_219";
end
else // >= 220
begin
if (x == 220) return "AAT_Ring_220";
if (x == 221) return "AAT_Ring_221";
if (x == 222) return "AAT_Ring_222";
if (x == 223) return "AAT_Ring_223";
end
end
end
end
else // >= 220
begin
if (x < 240)
begin
if (x < 232)
begin
if (x < 228)
begin
if (x == 224) return "AAT_Ring_224";
if (x == 225) return "AAT_Ring_225";
if (x == 226) return "AAT_Ring_226";
if (x == 227) return "AAT_Ring_227";
end
else // >= 228
begin
if (x == 228) return "AAT_Ring_228";
if (x == 229) return "AAT_Ring_229";
if (x == 230) return "AAT_Ring_230";
if (x == 231) return "AAT_Ring_231";
end
end
else // >= 232
begin
if (x < 236)
begin
if (x == 232) return "AAT_Ring_232";
if (x == 233) return "AAT_Ring_233";
if (x == 234) return "AAT_Ring_234";
if (x == 235) return "AAT_Ring_235";
end
else // >= 236
begin
if (x == 236) return "AAT_Ring_236";
if (x == 237) return "AAT_Ring_237";
if (x == 238) return "AAT_Ring_238";
if (x == 239) return "AAT_Ring_239";
end
end
end
else // >= 240
begin
if (x < 248)
begin
if (x < 244)
begin
if (x == 240) return "AAT_Ring_240";
if (x == 241) return "AAT_Ring_241";
if (x == 242) return "AAT_Ring_242";
if (x == 243) return "AAT_Ring_243";
end
else // >= 244
begin
if (x == 244) return "AAT_Ring_244";
if (x == 245) return "AAT_Ring_245";
if (x == 246) return "AAT_Ring_246";
if (x == 247) return "AAT_Ring_247";
end
end
else // >= 248
begin
if (x < 252)
begin
if (x == 248) return "AAT_Ring_248";
if (x == 249) return "AAT_Ring_249";
if (x == 250) return "AAT_Ring_250";
if (x == 251) return "AAT_Ring_251";
end
else // >= 252
begin
if (x == 252) return "AAT_Ring_252";
if (x == 253) return "AAT_Ring_253";
if (x == 254) return "AAT_Ring_254";
if (x >= 255) return "AAT_Ring_255";
end
end
end
end
end
end

return "AAT_Ring_255";
end
///////////////////////////////////////////////////////////////////////////////

Binary tree works very fast.
Have a nice mods ;)