xxq250/Nasal-Interpreter
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gc changed to mark-sweep

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Valk Richard Li
2021-03-27 01:08:05 +08:00
parent 569d5c6c6a
commit 144e6f45da
15 changed files with 1678 additions and 2000 deletions
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nasal.h
+6 -7
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@@ -25,7 +25,7 @@
check if a string can be converted to a number
if this string cannot be converted to a number,it will return nan
*/
inline double hex_to_double(std::string str)
inline double hex_to_double(std::string& str)
{
double ret=0;
for(int i=2;str[i];++i)
@@ -42,7 +42,7 @@ inline double hex_to_double(std::string str)
}
return ret;
}
inline double oct_to_double(std::string str)
inline double oct_to_double(std::string& str)
{
double ret=0;
for(int i=2;str[i];++i)
@@ -55,7 +55,7 @@ inline double oct_to_double(std::string str)
}
return ret;
}
inline double dec_to_double(std::string str,int len)
inline double dec_to_double(std::string& str,int len)
{
double ret=0;
int i=0;
@@ -96,14 +96,13 @@ inline double dec_to_double(std::string str,int len)
}
double trans_string_to_number(std::string str)
{
double is_negative=1;
bool is_negative=false;
int len=str.length();
double ret_num=0;
if(!len) return std::nan("");
if(str[0]=='-' || str[0]=='+')
{
if(len==1) return std::nan("");
is_negative=(str[0]=='-'?-1:1);
is_negative=(str[0]=='-');
str=str.substr(1,len--);
}
if(len>1 && str[0]=='0' && str[1]=='x')
@@ -112,7 +111,7 @@ double trans_string_to_number(std::string str)
ret_num=oct_to_double(str);
else
ret_num=dec_to_double(str,len);
return is_negative*ret_num;
return is_negative?-ret_num:ret_num;
}
/*