Mercurial > gnulib
view lib/wcsrtombs-impl.h @ 40086:d6de7c427079
stdopen: modernize and simplify
* lib/stdopen.c: Update copyright date
Do not include sys/types.h; no longer needed these days.
(stdopen): Use C99-style decl in loop. Return int errno
value, rather than just a bool. Do not worry about fd mismatches,
since the caller cares only if 0, 1, 2 are occupied.
* lib/stdopen.h: No need to include <stdbool.h>.
* m4/stdopen.m4: Remove.
* modules/stdopen: New file.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 05 Jan 2019 18:02:32 -0800 |
parents | b06060465f09 |
children |
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/* Convert wide string to string. Copyright (C) 2008, 2010-2019 Free Software Foundation, Inc. Written by Bruno Haible <bruno@clisp.org>, 2008. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ size_t wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps) { if (ps == NULL) ps = &_gl_wcsrtombs_state; { const wchar_t *src = *srcp; size_t cur_max = MB_CUR_MAX; char buf[64]; if (!(cur_max <= sizeof (buf))) abort (); if (dest != NULL) { char *destptr = dest; for (; len > 0; src++) { wchar_t wc = *src; size_t ret = wcrtomb (len >= cur_max ? destptr : buf, wc, ps); if (ret == (size_t)(-1)) goto bad_input; if (!(ret <= cur_max)) abort (); if (len < ret) break; if (len < cur_max) memcpy (destptr, buf, ret); if (wc == 0) { src = NULL; /* Here mbsinit (ps). */ break; } destptr += ret; len -= ret; } *srcp = src; return destptr - dest; } else { /* Ignore dest and len, don't store *srcp at the end, and don't clobber *ps. */ mbstate_t state = *ps; size_t totalcount = 0; for (;; src++) { wchar_t wc = *src; size_t ret = wcrtomb (buf, wc, &state); if (ret == (size_t)(-1)) goto bad_input2; if (wc == 0) { /* Here mbsinit (&state). */ break; } totalcount += ret; } return totalcount; } bad_input: *srcp = src; bad_input2: errno = EILSEQ; return (size_t)(-1); } }