FastGrid documentation

This is internal information not required for normal use!
Describes how the values are converted to strings, to which characters.
The generated strings contain only safe Unicode JavaScript string characters (also without double quotes and backslash): u20 - u21, u23 - u5B, u5D - u84, u86 - u9F, uA1 - u2027, u202A - uD7FF, uE000 - uFDCF, uFDF0 - uFFEF, uFFF9 - uFFFD.

Description	1 char	2 chars	3 chars	5 chars	Notes
Codes null as	"!"	"!!"	"!!!"	"!!!!!"
Codes NaN as	" " / " "	"! "	"! "	"! "	1 char codes NaN as " " on var string ucode&0x80
Codes "" as	"#" / "#!"	"!#"	"!! "	"!!# "	1 char codes "" as "#!" on ucode2 var string ucode&0x80 and &0x7FC000; 5 chars codes Infinity: "!!$ ", -Infinity: "!!% "
Codes 0 as	"$"	"$#"	"###"	"#####"
Char(s) prefix	---	" "	" "	" "
String prefix	---	---	"!"	"!"
Var string prefix	" "	" "	" "	" "
UCode2 var string prefix	"#"	"#"	"!"	---

Fixed length string 1 char (ucode == 0x41) codes null as "\u0381", NaN as "\u0380" and "" as "\x7F".
Fixed length string 2+ chars (ucode = 0x42 ~ 0x80) codes null as "\x7F!" plus spaces, NaN as "\x7F\x7F" plus spaces and "" as "\x7F " plus spaces.
Separated and adjacent strings (ucode = 0xC8 ~ 0xDF, 0xE8 ~ 0xFF) codes null as "!!" and rest spaces, NaN as "! " and rest spaces and "" as spaces.
Separated and adjacent strings var length (ucode = 0xC0 ~ 0xC3, 0xE0 ~ 0xE3) codes null as "!!", NaN as "! " and "" as one space " ". End of value is marked by one space " ". One char length >= 63415 is saved as two chars length prefixed by "!".

First 92 chars (35-91, 93-127) in UTF8 are coded in 1 byte (1 char ucode has only 91 chars, 36-91, 93-127).
Next 1918 chars (128-132, 134-159, 161-2047) in UTF8 are coded in 2 bytes.
Next 61395 chars (2048-8231, 8234-55295, 57344-64975, 65008-65519, 65529-65533) in UTF8 are coded in 3 bytes.
Maximum numbers per Unicode char is 63405 (63404 for 1 char ucode, but reduced to 63401).

Positive 1 char codes positive numbers from start to their limit, next codes negative numbers in 3 bytes to their limit and next codes strings till end of range in 3 bytes.
Integer 1 char codes numbers from start to their limit (positive*2 and -negative*2+1), next codes strings till end of range in 3 bytes.
Date 1 char codes dates from start to their limit, next codes ucode2 dates till half of the limit in 3 bytes and next codes strings till end of range in 3 bytes.

2 chars codes numbers by characters 36-91, 93-116, 435-8231, 8234-55295, 57344-64975, 65008-65519, 65529-65533 in the first char (63088 x 63404 = 4e9, the last char in the second char is a reserve).
2 chars codes strings by characters 117-124, 285-434 in the first char (158 x 63404 = 1e9, the last char in the second char is a reserve). Character 35 in the first char is num2 var string prefix.
Positive 2 chars codes negative numbers by characters 125-127, 128-132, 134-159, 161-284 in the first char (158 x 63404 = 1e9, the last char in the second char is a reserve). Integer 2 char codes in this range next 10M strings.
Date 2 chars codes the dates the same as integer numbers and ucode2 dates and strings are coded the same as strings (date*2 and string*2+1).

3 chars codes numbers and dates in the whole range of all 3 chars (63400 chars).
3 chars codes strings with character 32 in the first char and characters 35-91, 93-132, 134-159, 161-2047 in the next two chars. Optionally used 2048+ characters in the third char for 4M+ strings.

5 chars codes double float in characters 35-50 in the first char and in full range of the next 4 chars, size is mostly 13 bytes.
5 chars codes integers in characters 51-91, 93-132, 134-159, 161-2047 and characters 35-91, 93-132, 134-159, 161-2047 in the next 4 chars, size varies in 5 - 10 bytes.
5 chars codes strings with character 32 in the first char and 35-91, 93-127 in the next 4 characters, size is 5 bytes.

FastGrid documentation

Internal coding in UTF8 Store

Examples

Licensing

News

Documentation

Search

Download

Customer login

Price list

Purchase