unioffice/spreadsheet/format/isnumber.rl

// Copyright 2017 Baliance. All rights reserved.
//
// Use of this source code is governed by the terms of the Affero GNU General
// Public License version 3.0 as published by the Free Software Foundation and
// appearing in the file LICENSE included in the packaging of this file. A
// commercial license can be purchased by contacting sales@baliance.com.


package format
import (
)


%%{
  machine isnumber;
  write data;
  
  sign  = '+' | '-';
  integer = sign? [0-9]+;
  float   = sign? [0-9]+ '.' [0-9]+ ('E' sign [0-9]+)?;

  main := |*
  integer => { isNumber = te == len(data); };
  float => { isNumber = te == len(data); };
  any* => { isNumber = false; };
  *|;
}%%
func IsNumber(data string) (isNumber bool) {
  cs, p, pe := 0, 0, len(data)
  eof := len(data)
  ts, te,act := 0,0,0
  _ = te
  _ = act
  _ = ts
  
  
  %%{
    write init;
    write exec;
  }%%
   if cs == format_error {
     return false
   }
   return
}