nest-open-source / nest-hello / libiconv / 187c068a88a73655f37431b8c0e96eede1195edd / . / lib / ucs4swapped.h

/* | |

* Copyright (C) 1999-2000 Free Software Foundation, Inc. | |

* This file is part of the GNU LIBICONV Library. | |

* | |

* The GNU LIBICONV Library is free software; you can redistribute it | |

* and/or modify it under the terms of the GNU Library General Public | |

* License as published by the Free Software Foundation; either version 2 | |

* of the License, or (at your option) any later version. | |

* | |

* The GNU LIBICONV Library is distributed in the hope that it will be | |

* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of | |

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |

* Library General Public License for more details. | |

* | |

* You should have received a copy of the GNU Library General Public | |

* License along with the GNU LIBICONV Library; see the file COPYING.LIB. | |

* If not, write to the Free Software Foundation, Inc., 51 Franklin Street, | |

* Fifth Floor, Boston, MA 02110-1301, USA. | |

*/ | |

/* | |

* UCS-4-SWAPPED = UCS-4-INTERNAL with inverted endianness | |

*/ | |

static int | |

ucs4swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) | |

{ | |

/* This function assumes that 'unsigned int' has exactly 32 bits. */ | |

if (sizeof(unsigned int) != 4) abort(); | |

if (n >= 4) { | |

unsigned int x = *(const unsigned int *)s; | |

x = (x >> 24) | ((x >> 8) & 0xff00) | ((x & 0xff00) << 8) | (x << 24); | |

*pwc = x; | |

return 4; | |

} | |

return RET_TOOFEW(0); | |

} | |

static int | |

ucs4swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) | |

{ | |

/* This function assumes that 'unsigned int' has exactly 32 bits. */ | |

if (sizeof(unsigned int) != 4) abort(); | |

if (n >= 4) { | |

unsigned int x = wc; | |

x = (x >> 24) | ((x >> 8) & 0xff00) | ((x & 0xff00) << 8) | (x << 24); | |

*(unsigned int *)r = x; | |

return 4; | |

} else | |

return RET_TOOSMALL; | |

} |