/*
** Return true if zPath is an absolute pathname.  Return false
** if it is relative.
*/
int file_is_absolute_path(const char *zPath){
  if( zPath[0]=='/'
#if defined(__CYGWIN__)
#if defined(_WIN32) || defined(__CYGWIN__)
      || zPath[0]=='\\'
#elif defined(_WIN32)
      || zPath[0]=='\\'
      || (strlen(zPath)>3 && zPath[1]==':'
      || (fossil_isalpha(zPath[0]) && zPath[1]==':'
           && (zPath[2]=='\\' || zPath[2]=='/'))
#endif
  ){
    return 1;
  }else{
    return 0;
  }
}

/*
** Compute a canonical pathname for a file or directory.
** Make the name absolute if it is relative.
** Remove redundant / characters
** Remove all /./ path elements.
** Convert /A/../ to just /
** If the slash parameter is non-zero, the trailing slash, if any,
** is retained.
*/
void file_canonical_name(const char *zOrigName, Blob *pOut, int slash){
  if( file_is_absolute_path(zOrigName) ){
#if defined(_WIN32)
#if defined(_WIN32) || defined(__CYGWIN__)
    char *zOut;
#endif
    blob_set(pOut, zOrigName);
    blob_materialize(pOut);
#if defined(_WIN32)
#if defined(_WIN32) || defined(__CYGWIN__)
    /*
    ** On Windows, normalize the drive letter to upper case.
    ** On Windows/cygwin, normalize the drive letter to upper case.
    */
    zOut = blob_str(pOut);
    if( fossil_isalpha(zOut[0]) && zOut[1]==':' ){
    if( fossil_islower(zOut[0]) && zOut[1]==':' ){
      zOut[0] = fossil_toupper(zOut[0]);
    }
#endif
  }else{
    char zPwd[2000];
    file_getcwd(zPwd, sizeof(zPwd)-strlen(zOrigName));
#if defined(_WIN32)
    /*
    ** On Windows, normalize the drive letter to upper case.
    */
    if( fossil_isalpha(zPwd[0]) && zPwd[1]==':' ){
    if( fossil_islower(zPwd[0]) && zPwd[1]==':' ){
      zPwd[0] = fossil_toupper(zPwd[0]);
    }
#endif
    blob_zero(pOut);
    blob_appendf(pOut, "%//%/", zPwd, zOrigName);
  }
  blob_resize(pOut, file_simplify_name(blob_buffer(pOut),

**
** Canonical names are full pathnames using "/" not "\" and which
** contain no "/./" or "/../" terms.
*/
int file_is_canonical(const char *z){
  int i;
  if( z[0]!='/'
#if defined(_WIN32)
    && (z[0]==0 || z[1]!=':' || z[2]!='/')
#if defined(_WIN32) || defined(__CYGWIN__)
    && (!fossil_isupper(z[0]) || z[1]!=':' || z[2]!='/')
#endif
  ) return 0;

  for(i=0; z[i]; i++){
    if( z[i]=='\\' ) return 0;
    if( z[i]=='/' ){
      if( z[i+1]=='.' ){

  }
}

/*
** Construct a random temporary filename into zBuf[].
*/
void file_tempname(int nBuf, char *zBuf){
  static const char *azDirs[] = {
#if defined(_WIN32)
  const char *azDirs[] = {
     0, /* GetTempPath */
     0, /* TEMP */
     0, /* TMP */
     ".",
  };
#else
  static const char *const azDirs[] = {
     "/var/tmp",
     "/usr/tmp",
     "/tmp",
     "/temp",
#endif
     ".",
  };
#endif
  static const unsigned char zChars[] =
    "abcdefghijklmnopqrstuvwxyz"
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    "0123456789";
  unsigned int i, j;
  const char *zDir = ".";
  int cnt = 0;

    for(i=0; i<15; i++, j++){
      zBuf[j] = (char)zChars[ ((unsigned char)zBuf[j])%(sizeof(zChars)-1) ];
    }
    zBuf[j] = 0;
  }while( file_size(zBuf)>=0 );

#if defined(_WIN32)
  fossil_filename_free((char *)azDirs[0]);
  fossil_unicode_free((char *)azDirs[1]);
  fossil_unicode_free((char *)azDirs[2]);
  fossil_filename_free((char *)azDirs[1]);
  fossil_filename_free((char *)azDirs[2]);
#endif
}


/*
** Return true if a file named zName exists and has identical content
** to the blob pContent.  If zName does not exist or if the content is