nest-open-source / nest-hello / libiconv / 187c068a88a73655f37431b8c0e96eede1195edd / . / lib / ucs2swapped.h

/* | |

* Copyright (C) 1999-2001 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-2-SWAPPED = UCS-2-INTERNAL with inverted endianness | |

*/ | |

static int | |

ucs2swapped_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n) | |

{ | |

/* This function assumes that 'unsigned short' has exactly 16 bits. */ | |

if (sizeof(unsigned short) != 2) abort(); | |

if (n >= 2) { | |

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

x = (x >> 8) | (x << 8); | |

if (x >= 0xd800 && x < 0xe000) { | |

return RET_ILSEQ; | |

} else { | |

*pwc = x; | |

return 2; | |

} | |

} | |

return RET_TOOFEW(0); | |

} | |

static int | |

ucs2swapped_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n) | |

{ | |

/* This function assumes that 'unsigned short' has exactly 16 bits. */ | |

if (sizeof(unsigned short) != 2) abort(); | |

if (wc < 0x10000 && !(wc >= 0xd800 && wc < 0xe000)) { | |

if (n >= 2) { | |

unsigned short x = wc; | |

x = (x >> 8) | (x << 8); | |

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

return 2; | |

} else | |

return RET_TOOSMALL; | |

} else | |

return RET_ILUNI; | |

} |