Difference between revisions of "User:Void Singer/Functions"

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m (Undo revision 707652 (abs overflow protection (probably overkill in stamp to unix, but quite possible in unix 2 stamp)))
(pffft i forgot about 0x80000000, that loop was unsightly; you can be clever with the values just don't cross the 1969/1970 border or it will think it has flowed. Use clever dates to avoid the border.)
Line 187: Line 187:


list uUnix2StampLst( integer vIntDate ){
list uUnix2StampLst( integer vIntDate ){
if (-llAbs( vIntDate ) < -2145916800){
if (vIntDate / 2145916801){
vIntDate = 2145916800 * (1 | -(vIntDate < 0));
vIntDate = 2145916800 * (1 | (vIntDate >> 31));
}
}
integer vIntYear = 126230400;
integer vIntYear = 126230400;
Line 225: Line 225:
=== List format to Unix time code. ===
=== List format to Unix time code. ===
<lsl>/*//-- Notes:
<lsl>/*//-- Notes:
  Time codes before the year 1902 or past the end of 2037
  Time codes before 13 Dec 1901 20:45:52 return the value for 13 Dec 1901 20:45:52 (-2147483648).
  are capped to the first second of 1902 and 2038 respectively
Time codes after 19 Jan 2038 03:14:07 return the value for 19 Jan 2038 03:14:07 (2147483647).
   
   
  Input format is [Y, M, D, h, m, s] in numerals. Strings are converted.
  Input format is [Y, M, D, h, m, s] in numerals. Strings are converted.
Line 236: Line 236:
integer vIntYear = llList2Integer( vLstStp, 0 );
integer vIntYear = llList2Integer( vLstStp, 0 );
integer vIntRtn;
integer vIntRtn;
if (-llAbs(vIntYear - 1970) < -68){
if ((vIntYear - 1845) >> 8){//try to avoid double flows
vIntRtn = 2145916800 * (1 | -(vIntYear < 1902));
vIntRtn = 0x7FFFFFFF + (vIntYear < 1970);
}else{
} else {
integer vIntMnth = llList2Integer( vLstStp, 1 );
integer vIntMnth = llList2Integer( vLstStp, 1 );
integer vIntDays = ~-llList2Integer( vLstStp, 2 );
vIntRtn = llList2Integer( vLstStp, 3 ) * 3600 +
vIntRtn = llList2Integer( vLstStp, 3 ) * 3600 +
          llList2Integer( vLstStp, 4 ) * 60 +
          llList2Integer( vLstStp, 4 ) * 60 +
          llList2Integer( vLstStp, 5 );
          llList2Integer( vLstStp, 5 ) +
@Loop; if (--vIntMnth){
        (llList2Integer( vLstStp, 2 ) +
vIntDays += (30 | (vIntMnth & 1) ^ (vIntMnth > 7)) + (vIntMnth == 2) * ~!!(vIntYear & 3);
          (vIntYear * 365) + ((vIntYear - 2878293) >> 2) +
jump Loop;
          (vIntMnth *  30) +
}
          ((vIntMnth + (vIntMnth > 8)) >> 1) -
vIntYear -= 1902;
          ((vIntMnth > 2) << ((vIntYear & 3) && ((vIntYear - 100) % 200)))
vIntRtn += ((vIntYear >> 2) * 1461 + (vIntYear & 3) * 365 + ((vIntYear & 3) == 3) + vIntDays) *
        ) * 86400;
          86400 - 2145916800;
if((vIntRtn ^ (vIntYear - 1970)) & 0x80000000) { //sign mismatch
vIntRtn = 0x80000000 + (vIntRtn >> 31);
                }//This could be an (over|under)flow or it could be the user being clever.
}
}
return vIntRtn;
return vIntRtn;

Revision as of 22:02, 19 January 2010

String: Get Reverse Order

Reverse String Order (faster version)

<lsl>string uStringRevF( string vStrSrc ){ 

   integer vIntCnt = llStringLength( vStrSrc );
   @Loop; if (vIntCnt--){
       vStrSrc += llGetSubString( vStrSrc, vIntCnt, vIntCnt );
       jump Loop;
   }
   return llGetSubString( vStrSrc, llStringLength( vStrSrc ) >> 1, -1 );

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

Reverse String Order (smaller memory version)

<lsl>string uStringRevS( string vStrSrc ){ 

   integer vIntCnt = llStringLength( vStrSrc );
   @Loop; if (vIntCnt--){
       vStrSrc += llGetSubString( vStrSrc, vIntCnt, vIntCnt );
       vStrSrc = llDeleteSubString( vStrSrc, vIntCnt, vIntCnt );
       jump Loop;
   }
   return vStrSrc;

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

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String: Find Last Index

Get Last Index of String Test in String Source

<lsl>integer uGetStrIdxRev1( string vStrSrc, string vStrTst ){ 

   integer vIdxFnd =
     llStringLength( vStrSrc ) -
     llStringLength( vStrTst ) -
     llStringLength(
       llList2String(
         llParseStringKeepNulls( vStrSrc, (list)vStrTst, [] ),
         -1)
       );
return (vIdxFnd

List: Get Reverse Order

Reverse List Order (faster version)

<lsl>list uListRevF( list vLstSrc ){ 

   integer vIntCnt = (vLstSrc != []);
   @Loop; if (vIntCnt--){
       vLstSrc += llList2List( vLstSrc, vIntCnt, vIntCnt );
       jump Loop;
   }
   return llList2List( vLstSrc, (vLstSrc != []) >> 1, -1 );

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

Reverse List Order (smaller memory version)

<lsl>list uListRevS( list vLstSrc ){ 

   integer vIntCnt = (vLstSrc != []);
   @Loop; if (vIntCnt--){
       vLstSrc += llList2List( vLstSrc, vIntCnt, vIntCnt );
       vLstSrc = llDeleteSubList( vLstSrc, vIntCnt, vIntCnt );
       jump Loop;
   }
   return vLstSrc;

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

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List: Find Last Index

  • This function is a companion to llListFindList.
    • SPECIAL NOTE: this is only designed to work on string data that will NOT contain the "•" character(alt+7)... please use a different character to suit your needs.

Get Last Index of List Test in List Source

<lsl>integer uGetLstIdxRev( list vLstSrc, list vLstTst ){ 

   integer vIdxFnd =
     (vLstSrc != []) +
     ([] != vLstTst) +
     ([] != llParseString2List(
              llList2String(
                llParseStringKeepNulls(
                  llDumpList2String( vLstSrc, "•" ),
                  (list)llDumpList2String( vLstTst, "•" ),
                  [] ),
                -1 ),
              (list)"•",
              [] ));
return (vIdxFnd

List: Multi-Find Index (First or Last)

Get First Index in List Source of any element in List Test

<lsl>integer uMatchLstIdxFwd( list vLstSrc, list vLstTst ){ 

 return ((llParseString2List( 
            llList2String(
              llParseStringKeepNulls(
                llDumpList2String( vLstSrc, ";" ),
                vLstTst, [] ),
              0 ),
            (list)";", [] ) != []) + 1) %
        ((vLstSrc != []) + 1) - 1;

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

Get Last Index in List Source of any element in List Test

<lsl>integer uMatchLstIdxRev( list vLstSrc, list vLstTst ){ 

 return (vLstSrc != []) -
   (llParseString2List(
      llList2String(
        llParseString2List( 
          llDumpList2String( vLstSrc, ";" ),
          vLstTst, [] ),
        -1 ),
      (list)";",
      [] ) != []) - 1;

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

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Timestamp: Converters

Unix time code to list format.

<lsl> /*//-- Notes: 

Time codes before the year 1902 or past the end of 2037
 are capped to the first second of 1902 and 2038 respectively

Output is [Y, M, D, h, m, s] list format.

This version could be improved.

//*/

list uUnix2StampLst( integer vIntDate ){ if (vIntDate / 2145916801){

vIntDate = 2145916800 * (1

Timestamp: Get Weekday from timestamp

Weekday from Unix timestamp

<lsl>/*//-- Note: 

Accurate from 1901 to 2099 (no limiting code)

//*/

string uUnix2WeekdayStr( integer vIntDat ){ 

   return llList2String( ["Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday"],
                          vIntDate % 604800 / 86400  - (vIntDate < 0) );

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

Weekday from ( Y, M, D ) format

<lsl>/*//-- Note: 

Accurate from 1901 to 2099 (no limiting code)

This version could be improved.

//*/

string uStamp2WeekdayStr( integer vIntYear, integer vIntMonth, integer vIntDay ){ return llList2String ( ["Friday", "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday"], 

                      (vIntYear + (vIntYear >> 2) - ((vIntMonth < 3) & !(vIntYear & 3)) + vIntDay
                      + (integer)llGetSubString( "_033614625035", vIntMonth, vIntMonth )) % 7 );

} /*//-- Anti-License Text --//*/ /*// Contributed Freely to the Public Domain without limitation. //*/ /*// 2009 (CC0) [ http://creativecommons.org/publicdomain/zero/1.0 ] //*/ /*// Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] //*/ /*//-- --//*/</lsl>

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Questions or Comments?

Feel free to leave me a note on my User Talk page.
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