wy__scanum.h

一个不错

/* Copyright is licensed under GNU LGPL.                 by I.J.Wang 2006

   Header only for inclusion
*/

#ifndef WY__SCAN_NUM_H__
#define WY__SCAN_NUM_H__

// [Benefit] Make usage like sscanf(text,"%f %ld %d %x",..) easier
//
template <typename ValueType>
WyRet wy__scanum(ValueType& value, size_t& idx, const WyCSeg& text, const int& radix)
{
 static const WyCSeg Blanks=" \f\n\r\t\v";
 const char* endptr;
 size_t fidx=idx;
 ValueType res;
 if(text.findc_not(&fidx,fidx,Blanks)==false) {
   WY_RETURN( Wym_ENOENT ); // all blanks
 }
 const WyRet r=Wy::_strnum(res,&endptr,text.cseg(fidx),radix);
 if((r==Ok)||(r==Wym_EBADMSG)) {
   idx=endptr-text.begin();
   value=res;
   return(Ok);
 }
 WY_RETURN(r);
};

#endif  // end WY__SCAN_NUM_H__