/* Convert characters in input buffer using conversion descriptor to output buffer. Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <stddef.h> /* for NULL */ #include <errno.h> #include <iconv.h> #include <gconv_int.h> #include <assert.h> size_t iconv (iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) { __gconv_t gcd = (__gconv_t) cd; char *outstart = outbuf ? *outbuf : NULL; size_t irreversible; int result; if (__builtin_expect (inbuf == NULL || *inbuf == NULL, 0)) { if (outbuf == NULL || *outbuf == NULL) result = __gconv (gcd, NULL, NULL, NULL, NULL, &irreversible); else result = __gconv (gcd, NULL, NULL, (unsigned char **) outbuf, (unsigned char *) (outstart + *outbytesleft), &irreversible); } else { const char *instart = *inbuf; result = __gconv (gcd, (const unsigned char **) inbuf, (const unsigned char *) (*inbuf + *inbytesleft), (unsigned char **) outbuf, (unsigned char *) (*outbuf + *outbytesleft), &irreversible); *inbytesleft -= *inbuf - instart; } if (outstart != NULL) *outbytesleft -= *outbuf - outstart; switch (__builtin_expect (result, __GCONV_OK)) { case __GCONV_ILLEGAL_DESCRIPTOR: __set_errno (EBADF); irreversible = (size_t) -1L; break; case __GCONV_ILLEGAL_INPUT: __set_errno (EILSEQ); irreversible = (size_t) -1L; break; case __GCONV_FULL_OUTPUT: __set_errno (E2BIG); irreversible = (size_t) -1L; break; case __GCONV_INCOMPLETE_INPUT: __set_errno (EINVAL); irreversible = (size_t) -1L; break; case __GCONV_EMPTY_INPUT: case __GCONV_OK: /* Nothing. */ break; default: assert (!"Nothing like this should happen"); } return irreversible; }