xxq250
/
Nasal-Interpreter
mirror of https://github.com/ValKmjolnir/Nasal-Interpreter.git
1
0
Fork 0
Code Issues Actions 1 Packages Projects Releases Wiki Activity

Delete numeral_misc.h

This commit is contained in:
Valk Richard Li 2020-02-15 16:34:42 +08:00 committed by GitHub
parent 5a92cbce1e
commit 3c79402933
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 0 additions and 152 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

152
version2.0/numeral_misc.h
View File

@ -1,152 +0,0 @@
#ifndef __NUMERAL_MISC_H__
#define __NUMERAL_MISC_H__
bool check_numerable_string(std::string str)
{
if(str.length()>1 && str[0]=='-')
{
// in lexer this statements are useless
// because lexer judge a number that begins with 0~9 (or 0x for hex & 0o for oct)
std::string temp="";
int str_len=str.length();
for(int i=1;i<str_len;++i)
temp+=str[i];
str=temp;
}
if(str.length()==1 && '0'<=str[0] && str[0]<='9')
return true;
else if(str.length()>2 && str[0]=='0' && str[1]=='x')
{
int str_len=str.length();
for(int i=2;i<str_len;++i)
if(!(('0'<=str[i] && str[i]<='9') || ('a'<=str[i] && str[i]<='f') || ('A'<=str[i] && str[i]<='F')))
return false;
return true;
}
else if(str.length()>2 && str[0]=='0' && str[1]=='o')
{
int str_len=str.length();
for(int i=2;i<str_len;++i)
if(!('0'<=str[i] && str[i]<='7'))
return false;
return true;
}
else
{
int str_len=str.length();
int float_dot_cnt=0;
for(int i=0;i<str_len;++i)
{
if(str[i]=='.')
++float_dot_cnt;
else if(!('0'<=str[i] && str[i]<='9'))
return false;
}
if((float_dot_cnt>1) || (str[0]=='.') || (!float_dot_cnt && str[0]=='0'))
return false;
return true;
}
return false;
}
double trans_string_to_number(std::string str)
{
bool is_negative=false;
if(str.length()>1 && str[0]=='-')
{
// in parse this statements are useless
// because lexer recognizes a number that begins with a '0'~'9' char
std::string temp="";
int str_len=str.length();
for(int i=1;i<str_len;++i)
temp+=str[i];
str=temp;
is_negative=true;
}
double trans_str_number=0;
if(str.length()==1)
trans_str_number=(double)(str[0]-'0');
else if(str[0]=='0' && str[1]=='x')
{
long long int hex_number=0,bit_pow=1;
for(int i=str.length()-1;i>1;--i)
{
if('0'<=str[i] && str[i]<='9')
hex_number+=bit_pow*(str[i]-'0');
else if('a'<=str[i] && str[i]<='f')
hex_number+=bit_pow*(10+str[i]-'a');
else
hex_number+=bit_pow*(10+str[i]-'A');
bit_pow<<=4;
}
trans_str_number=(double)hex_number;
}
else if(str[0]=='0' && str[1]=='o')
{
long long int oct_number=0,bit_pow=1;
for(int i=str.length()-1;i>1;--i)
{
oct_number+=bit_pow*(str[i]-'0');
bit_pow<<=3;
}
trans_str_number=(double)oct_number;
}
else
{
int float_dot_place=str.length();
int str_len=str.length();
double pow;
for(int i=0;i<str_len;++i)
if(str[i]=='.')
{
float_dot_place=i;
break;
}
pow=0.1;
for(int i=float_dot_place+1;i<str_len;++i)
{
trans_str_number+=pow*(double(str[i]-'0'));
pow/=10;
}
pow=1;
for(int i=float_dot_place-1;i>=0;--i)
{
trans_str_number+=pow*(double(str[i]-'0'));
pow*=10;
}
}
if(is_negative)
trans_str_number*=-1;
return trans_str_number;
}
std::string trans_number_to_string(double number)
{
std::string trans_num_string="";
if(number<0)
{
trans_num_string+='-';
number*=-1;
}
double integer_bit=1;
while(number>=integer_bit)
integer_bit*=10;
integer_bit/=10;
while(integer_bit!=0.1)
{
trans_num_string+=(char)('0'+(int(number/integer_bit)));
number-=(double)(int(number/integer_bit))*integer_bit;
integer_bit/=10;
}
if(number!=0)
trans_num_string+='.';
while(number!=0)
{
trans_num_string+=(char)('0'+int(number*10));
number*=10;
number-=(double)(int(number));
}
return trans_num_string;
}
#endif