astroem/jsfitsio/idx.c
static void culc(char *s){
  while(*s){
    if( isupper((int)*s) ) *s = tolower(*s);
    s++;
  }
}
/* upper to lower case and back */
upper to lower case and back
upper to lower case and back
static void culc(char *s){
  while(*s){
    if( isupper((int)*s) ) *s = tolower(*s);
    s++;
  }
}
static void culc ( char * s ) { while ( * s ) { if ( isupper ( ( int ) * s ) ) * s = tolower ( * s ) ; s ++ ; } }
upper to lower case and back
upper to lower case and back