得到指定占用宽度的字体。（英文占用一个位，中文占用两个位，英文大写占用两个位）...

测试账号 2021-01-12 03:02 338阅读 0赞

\---检查字符是否为英文  
function charIsEn(char)  
local b = string.byte(char, 1)  
return b < 0x80  
end

\---检查字符否为大写  
function charUpperEn(char)  
local b = string.byte(char, 1)  
return b < 0x80 and b > 0x40 and b < 0x5b;  
end

\--"口香糖除あなたのお母さんの卵了提升艺术气Tôi hẹn hò với em gái của bạn质外口香糖除了提升艺术气质外"  
\--PS:为了保证字符的可用性，可能会比要求的长一个占位空间  
function string.getSolidLen(utfstr,outSolidLen)  
local counter = 1;  
local outstr="";  
while counter <= \#utfstr do  
local len = 0;  
\--单个字符的字节长度  
local b = string.byte(utfstr, counter);  
if b<0xC0 then len = 1;  
elseif b<0xE0 then len = 2;  
elseif b<0xF0 then len = 3;  
elseif b<0xF8 then len = 4;  
elseif b<0xFC then len = 5;  
else len = 6;  
end

local char = string.sub(utfstr,counter,counter + len - 1);  
  
if charIsEn(char) == true and charUpperEn(char) == false then  
outSolidLen = outSolidLen - 1;  
else  
outSolidLen = outSolidLen - 2;  
end  
outstr = outstr..char;  
counter = counter + len  
if outSolidLen <= 0 then break end  
end  
return outstr  
end

function outTest( ... )  
local str1 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",1);  
local str2 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",2);  
local str3 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",3);  
local str4 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",4);  
local str5 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",5);  
local str6 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",6);  
local str7 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",7);  
local str8 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",8);  
local str9 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",9);  
local str10 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",10);  
local str11 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",11);  
local str12 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",12);  
local str13 = string.getSolidLen("口香糖1除bABCDEFgHiGKLM",13);  
print(str1);  
print(str2);  
print(str3);  
print(str4);  
print(str5);  
print(str6);  
print(str7);  
print(str8);  
print(str9);  
print(str10);  
print(str11);  
print(str12);  
print(str13);  
end

outTest();