/* u4name.c   (c)Copyright Sequiter Software Inc., 1990-1994.  All rights reserved.  */

/*************************************************************************************/
/* Soragna 20 Giugno 1995. Modificate le funzioni che discriminavano tra UNIX e DOS!.*/ 
/* In alcuni casi si eccedeva la dimensione delle stringhe di copia a causa della    */
/* differenza tra / e \ che riscontrano queste funzioni. Siccome le applicazioni     */
/* PR.A.S.S.I. non sono sensibili a tali differenze, e' meglio adeguare il qui       */
/* presente file. Sostanzialmente tutti i controlli su / e \ vengono unificati.      */
/*************************************************************************************/

#include "d4all.h"
#ifndef S4UNIX
#ifdef __TURBOC__
#pragma hdrstop
#endif
#endif

void S4FUNCTION u4name_ext( char *name, int len_result, char *new_ext, int do_replace )
{
  int file_name_len, ext_pos, on_pos, ext_len ;

  char *ptr ;

  ptr = name + (int)strlen( name ) - 1 ;
  while ( *ptr == ' ' )
  {
    *ptr = '\0' ;
    ptr-- ;
  }

  ext_pos = file_name_len = strlen( name ) ;

  for( on_pos = ext_pos-1 ;; on_pos-- )
  {
    if ( name[on_pos] == '.' )
    {
      ext_pos = on_pos ;
      break ;
    } 
    /* Soragna 20 Giugno 1995. Questa discriminazione provoca danni.
       #ifdef S4UNIX
       if ( name[on_pos] == '/' )  break ;
       #else
       if ( name[on_pos] == '\\' )  break ;
       #endif
       */
    if ( name[on_pos] == '/' || name[on_pos] == '\\' )  break ;
    if ( on_pos == 0 )  break ;
  }

  if ( file_name_len != ext_pos &&  !do_replace )
  {
#ifndef S4UNIX
    c4upper( name ) ;
#endif
    return ;
  }

  if ( *new_ext == '.' )
    new_ext++ ;
  ext_len = strlen( new_ext ) ;

  if ( ext_len > 3 )
    ext_len = 3 ;

#ifdef S4DEBUG
  if ( len_result <= ext_pos + ext_len + 1 )
    e4severe( e4result, E4_U4NAME_EXT ) ;
#endif

  name[ext_pos++] = '.' ;
  strcpy( name + ext_pos, new_ext ) ;

#ifndef S4UNIX
  c4upper(name) ;
#endif
}

void S4FUNCTION u4name_make( char *buf, int buf_len, char *default_drive, char *default_directory, char *file_name )
{
  int default_directory_len, pos ;

  pos = 0 ;

  if( file_name[1] != ':' )
    if ( default_drive != 0 )
      if ( strlen( default_drive ) == 2 )
      {
        memcpy( buf, default_drive, 2 ) ;
        pos += 2 ;
      }

  if ( default_directory != 0 )
    default_directory_len = strlen( default_directory ) ;
  else
    default_directory_len = 0 ;

  /* Soragn 20 Giugno 1995. May cause improper assigns.
     #ifdef S4UNIX
     if ( file_name[0] != '/'  &&  default_directory_len > 0 )
     #else
     if ( file_name[0] != '\\'  &&  default_directory_len > 0 )
     #endif
     */
  if ( (file_name[0] != '/' || file_name[0] != '\\') &&  default_directory_len > 0 )
  {
    if ( pos+2 >= buf_len )
      return ;   
    /* Soragna 20 Giugno 1995. Anche questo controllo deve essere cambiato 
       #ifdef S4UNIX
       buf[pos++] = '/' ;
       if ( default_directory[0] == '/' )
       #else
       buf[pos++] = '\\' ;
       if ( default_directory[0] == '\\' )
       #endif
       */
#ifdef S4UNIX
    buf[pos++] = '/' ;
#else
    buf[pos++] = '\\' ;
#endif
    if ( default_directory[0] == '/' || default_directory[0] == '\\' )
      default_directory++ ;

    default_directory_len = strlen(default_directory) ;

    u4ncpy( buf+pos, default_directory, buf_len - pos ) ;
    pos += default_directory_len ;
  }

  if ( pos >= buf_len )
    return ;

  if ( pos > 0 )
  {
    /* Soragna 20 Giugno 1995. Pure questo non sfugge.
       #ifdef S4UNIX
       if ( buf[pos-1] != '/' )
       buf[pos++] = '/' ;
       if ( file_name[0] == '/'  )
       file_name++ ;
       #else
       if ( buf[pos-1] != '\\' )
       buf[pos++] = '\\' ;
       if ( file_name[0] == '\\'  )
       file_name++ ;
       #endif
       */
    if ( buf[pos-1] != '/' && buf[pos-1] != '\\' )
#ifdef S4UNIX
      buf[pos++] = '/' ;
#else
    buf[pos++] = '\\' ;
#endif
    if ( file_name[0] == '/' || file_name[0] == '\\'  )
      file_name++ ;
  }

  u4ncpy( buf+pos, file_name, buf_len-pos ) ;
}

void  S4FUNCTION u4name_piece( char *result, int len_result, char *from, int give_path, int give_ext )
{
  unsigned name_pos, ext_pos, on_pos, pos, new_len, from_len ;
  int are_past_ext ;

  name_pos = 0 ;
  are_past_ext = 0 ;
  ext_pos = from_len = strlen(from) ;
  if ( ext_pos == 0 )
  {
    *result = 0 ;
    return ;
  }

  for( on_pos = ext_pos-1;; on_pos-- )
  {
    switch ( from[on_pos] )
    {
      /* 
         Soragna 20 Giugno 1995. Questo era quello che faceva piu' danni.
         #ifdef S4UNIX
         case '/':
         #else
         case '\\':
         #endif
         */
    case '/':
    case '\\':
    case ':':
      if (name_pos == 0)  name_pos = on_pos + 1 ;
      are_past_ext = 1 ;
      break ;

    case '.':
      if ( ! are_past_ext )
      {
        ext_pos = on_pos ;
        are_past_ext = 1 ;
      }
      break ;
    default:
      break ;
    }

    if ( on_pos == 0 )
      break ;
  }

  pos = 0 ;
  new_len = from_len ;
  if ( !give_path )
  {
    pos = name_pos ;
    new_len -= name_pos ;
  }

  if ( !give_ext )
    new_len -= from_len - ext_pos ;

#ifdef S4DEBUG
  if ( new_len >= (unsigned) len_result )
    e4severe( e4result, E4_U4NAME_PIECE ) ;
#endif

  memcpy( result, from+ pos, new_len ) ;
  result[new_len] = 0 ;

#ifndef S4UNIX
  c4upper(result) ;
#endif
}

/* u4name_char  Returns TRUE iff it is a valid dBase field or function name character */
int S4FUNCTION u4name_char( unsigned char ch)
{
  return ( ch>='a' && ch<='z'  || ch>='A' && ch<='Z'  ||
#ifdef S4MDX
          ch>='0' && ch<='9'  || ch=='&' || ch=='@' ||
#else
          ch>='0' && ch<='9'  ||
#endif
          ch=='_'
          /*            ch=='\\'  ||  ch=='.'  || ch=='_'  ||  ch==':' */
#ifdef S4GERMAN
#ifdef S4ANSI
          || ch== 196  ||  ch== 214  || ch== 220  ||  ch== 223
          || ch== 228  ||  ch== 246  || ch== 252
#else
          || ch== 129  ||  ch== 132  || ch== 142  ||  ch== 148
          || ch== 153  ||  ch== 154  || ch== 225
#endif
#endif
#ifdef S4FRENCH
#ifdef S4ANSI
          || ch== 192 || ch== 194 || ch== 206 || ch== 207
          || ch== 212 || ch== 219 || ch== 224 || ch== 226
          || ch== 238 || ch== 239 || ch== 244 || ch== 251
          || (ch>= 199 && ch <= 203) || (ch >= 231 && ch <= 235)
#else
          || ch== 128 || ch== 130 || ch== 131 || ch== 133
          || ch== 144 || ch== 147 || ch== 150 || (ch>= 135 && ch <= 140)
#endif
#endif
#ifdef S4SWEDISH
#ifdef S4ANSI
          || ch== 196 || ch== 197 || ch== 198 || ch== 201
          || ch== 214 || ch== 220 || ch== 228 || ch== 229
          || ch== 230 || ch== 233 || ch== 246 || ch== 252 )
#else
    || ch== 129 || ch== 130 || ch== 132 || ch== 134
      || ch== 148 || ch== 153 || ch== 154 || (ch>= 142 && ch <= 146)
#endif
#endif
#ifdef S4FINNISH
#ifdef S4ANSI
        || ch== 196 || ch== 197 || ch== 198 || ch== 201
          || ch== 214 || ch== 220 || ch== 228 || ch== 229
            || ch== 230 || ch== 233 || ch== 246 || ch== 252 )
#else
  || ch== 129 || ch== 130 || ch== 132 || ch== 134
  || ch== 148 || ch== 153 || ch== 154 || (ch>= 142 && ch <= 146)
#endif
#endif
#ifdef S4NORWEGIAN
#ifdef S4ANSI
  || ch== 196 || ch== 197 || ch== 198 || ch== 201
  || ch== 214 || ch== 220 || ch== 228 || ch== 229
  || ch== 230 || ch== 233 || ch== 246 || ch== 252 )
#else
  || ch== 129 || ch== 130 || ch== 132 || ch== 134
  || ch== 148 || ch== 153 || ch== 154 || (ch>= 142 && ch <= 146)
#endif
#endif
  ) ;
}

/* returns the length of the path in 'from', and copies the path in 'from' to result */
int S4FUNCTION u4name_path( char *result, int len_result, char *from )
{
  int on_pos ;

  u4name_piece( result, len_result, from, 1, 0 ) ;
  for( on_pos = 0 ; result[on_pos] != 0 ; on_pos++ ) ;

  for( ; on_pos >= 0 ; on_pos-- )
    /* Soragna 20 Giugno 1995. Anche questo puo' causare gravi macelli.
       #ifdef S4UNIX
       if( result[on_pos] == '/' || result[on_pos] == ':' ) break ;   
       #else
       if( result[on_pos] == '\\' || result[on_pos] == ':' ) break ;   
       #endif                                                              
       */
    if( result[on_pos] == '/' || result[on_pos] == '\\' || result[on_pos] == ':' ) break ;   /* end of path */

  if( on_pos < len_result )
    result[++on_pos] = '\0' ;
  return on_pos ;
}

/* returns the length of the extension in 'from', and copies the extension in 'from' to 'result' */
int S4FUNCTION u4name_ret_ext( char *result, int len_result, char *from )
{
  char on_pos, len, name[13] ;

#ifdef S4DEBUG
  if ( result == 0 || len_result < 3 || from == 0 )
    e4severe( e4parm, E4_U4NAME_RET_EXT ) ;
#endif

  u4name_piece( name, 13, from, 0, 1 ) ;

  len = 0 ;
  for( on_pos = 0 ; name[on_pos] != 0 ; on_pos++ )
    if ( name[on_pos] == '.' )
    {
      for ( on_pos++ ; name[on_pos] != 0 && len_result-- > 0 ; on_pos++, len++ )
        result[len] = name[on_pos] ;
      break ;
    }

  return len ;
}