kolibrios-gitea/programs/develop/libraries/menuetlibc/include/iostream

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#ifndef _IOSTREAM_INCLUDED
#define _IOSTREAM_INCLUDED
#include <cstdio>
#include <string>
namespace std
{
class istream
{
public:
istream() {}
virtual ~istream() {}
virtual istream& operator>>(string& s)=0;
virtual operator bool() const=0;
virtual int getc()=0;
virtual unsigned tellg()=0;
virtual istream& seekg(unsigned off,ios::seek_dir dir)=0;
virtual istream& getline(char* s, unsigned n, char delim)=0;
};
class ifstream : public istream
{
FILE* f;
public:
void open(const char* s, /*ios::open_mode*/int mode=ios::in)
{f=fopen(s,(mode&ios::binary)?"rb":"r");}
ifstream():f(NULL){}
ifstream(const char* s, /*ios::open_mode*/int mode=ios::in)
{open(s,mode);}
~ifstream() {if (f) fclose(f);}
bool fail() const {return f==NULL?true:ferror(f)||feof(f);}
operator bool() const {return !fail();}
bool eof() const {return f==NULL?false:feof(f);}
virtual istream& seekg(unsigned off,ios::seek_dir dir)
{fseek(f,off,dir);return *this;}
ifstream& read(char* s, unsigned n)
{if (fread(s,1,n,f)!=n) f->_flag|=0200;return *this;}
virtual unsigned tellg() {return ftell(f);}
ifstream& getline(char* s, unsigned n)
{fgets(s,n,f);unsigned m=strlen(s);
if(m&&s[m-1]=='\n')s[m-1]=0;else f->_flag|=0200;return *this;}
istream& operator>>(string& s)
{char res[512];fscanf(f,"%s",res);s=res;return *this;}
virtual istream& getline(char* s, unsigned n, char delim)
{
int c;
unsigned pos=0;
for (;pos<n-1;)
{
c=fgetc(f);
if (c==EOF) break;
if (c==delim) break;
s[pos++]=c;
}
s[pos]=0;
return *this;
}
int getc(void)
{ return fgetc(f); }
};
inline istream& getline(istream& is, string& str, char delim='\n')
{
str.erase();
while (is)
{
int c = is.getc();
if (c == EOF || c == delim)
break;
str += c;
}
return is;
}
class istringstream : public istream
{
string s;
unsigned pos;
public:
istringstream(const char* str):s(str),pos(0) {}
istringstream(const string& str):s(str.c_str()),pos(0) {}
istringstream& operator>>(int& n)
{int x;sscanf(s.c_str()+pos,"%d%n",&n,&x);pos+=x;return *this;}
istream& operator>>(string& s)
{int x;char res[512];sscanf(s.c_str()+pos,"%s%n",res,&x);pos+=x;
s=res;return *this;}
virtual operator bool() const {return s.c_str()[pos]!=0;}
virtual int getc()
{
char c=s.c_str()[pos];
if (c==0)
return EOF;
pos++;
return c;
}
virtual unsigned tellg() {return pos;}
virtual istream& seekg(unsigned off,ios::seek_dir dir)
{
unsigned sz=s.size();
switch (dir)
{
case ios::beg: pos=off;break;
case ios::cur: pos+=off;break;
case ios::end: pos=sz-off;break;
}
if (pos>sz) pos=sz;
return *this;
}
virtual istream& getline(char* str, unsigned n, char delim)
{
int c;
unsigned p=0;
for (;p<n-1;)
{
c=s[pos++];
if (c==0) {pos--;break;}
if (c==delim) break;
str[p++]=c;
}
str[p]=0;
return *this;
}
};
}
#endif