/* split line into elements, like awk
 * ver0.0
 * awk like な区切り規則( ホワイトスペース，カンマ区切り)で文字列を分解する
 * 戻値: 要素の数
 * (注意) 入力文字列は破壊されます．
 * 
 * char* cbuff  <- 入力文字列
 * char** adr   <- 分解した各要素へのアドレスを渡すための配列
 * char rem     <- 注釈始まりの記号
 *
 * #include <string.h>
 *
 * 例)
 * char* buff="  xxx, yyy  , zzz www  ; comment";
 * char* adr[99];
 * int nelm=strSplit(cbuff, adr, ';');
 *
 * adr[0] -> "xxx"
 * adr[1] -> "yyy"
 * adr[2] -> "zzz"
 * adr[3] -> "www"
 */
int strSplit(char* buff , char** adr , char rem=0)
{
  int i , n_index;
  char ch, phase = 0;
  char* remadr;

  if ( rem !=0 && ( remadr = strchr( buff , rem ) ) != NULL )
    *remadr = 0;
  
  i = n_index =0;  // i : position in line buff
  while( 1 ) {
    ch = buff[i];
    if ( strchr( " \t\n," , ch ) != NULL ) {
      if ( phase == 1) {
        buff[i] = 0;
        n_index++;
        phase = 2;  // phase 1->2
      }
      if ( ch == '\0' ) break;  // end of line detection
      if ( ch == ',' ) {
        if (phase == 0 ) {
          buff[i] = 0;   // case of phase 0->0
          adr[n_index] = buff+i;
          n_index++;
        }
        phase = 0;      // case of phase *->0
      }
    }
    else if ( phase == 0 || phase == 2) {
      adr[ n_index ] = buff + i;
      phase = 1;        // case of phase 0,2->1
    }
    i++;
  }
  return n_index;
}