diff options
Diffstat (limited to 'src/data-fd.c')
-rw-r--r-- | src/data-fd.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/src/data-fd.c b/src/data-fd.c new file mode 100644 index 0000000..388b45c --- /dev/null +++ b/src/data-fd.c @@ -0,0 +1,142 @@ +/* data-fd.c - A file descripor based data object. + Copyright (C) 2002, 2004 g10 Code GmbH + + This file is part of GPGME. + + GPGME 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. + + GPGME 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif + +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif +#ifdef HAVE_SYS_TYPES_H +# include <sys/types.h> +#endif + +#include "debug.h" +#include "data.h" + + + +#if defined(HAVE_W32CE_SYSTEM) && !defined(__MINGW32CE__) +/* We need to provide replacements for read, write and lseek. They + are taken from the cegcc runtime files, written by Pedro Alves + <pedro_alves@portugalmail.pt> in Feb 2007 and placed in the public + domain. (cf. cegcc/src/mingw/mingwex/wince/) */ + +#include <windows.h> + +static int +read (int fildes, void *buf, unsigned int bufsize) +{ + DWORD NumberOfBytesRead; + if (bufsize > 0x7fffffff) + bufsize = 0x7fffffff; + if (!ReadFile ((HANDLE) fildes, buf, bufsize, &NumberOfBytesRead, NULL)) + return -1; + return (int) NumberOfBytesRead; +} + +static int +write (int fildes, const void *buf, unsigned int bufsize) +{ + DWORD NumberOfBytesWritten; + if (bufsize > 0x7fffffff) + bufsize = 0x7fffffff; + if (!WriteFile ((HANDLE) fildes, buf, bufsize, &NumberOfBytesWritten, NULL)) + return -1; + return (int) NumberOfBytesWritten; +} + +static long +lseek (int fildes, long offset, int whence) +{ + DWORD mode; + switch (whence) + { + case SEEK_SET: + mode = FILE_BEGIN; + break; + case SEEK_CUR: + mode = FILE_CURRENT; + break; + case SEEK_END: + mode = FILE_END; + break; + default: + /* Specify an invalid mode so SetFilePointer catches it. */ + mode = (DWORD)-1; + } + return (long) SetFilePointer ((HANDLE) fildes, offset, NULL, mode); +} +#endif /*HAVE_W32CE_SYSTEM && !__MINGW32CE__*/ + + + +static ssize_t +fd_read (gpgme_data_t dh, void *buffer, size_t size) +{ + return read (dh->data.fd, buffer, size); +} + + +static ssize_t +fd_write (gpgme_data_t dh, const void *buffer, size_t size) +{ + return write (dh->data.fd, buffer, size); +} + + +static off_t +fd_seek (gpgme_data_t dh, off_t offset, int whence) +{ + return lseek (dh->data.fd, offset, whence); +} + + +static int +fd_get_fd (gpgme_data_t dh) +{ + return (dh->data.fd); +} + + +static struct _gpgme_data_cbs fd_cbs = + { + fd_read, + fd_write, + fd_seek, + NULL, + fd_get_fd + }; + + +gpgme_error_t +gpgme_data_new_from_fd (gpgme_data_t *r_dh, int fd) +{ + gpgme_error_t err; + TRACE_BEG1 (DEBUG_DATA, "gpgme_data_new_from_fd", r_dh, "fd=0x%x", fd); + + err = _gpgme_data_new (r_dh, &fd_cbs); + if (err) + return TRACE_ERR (err); + + (*r_dh)->data.fd = fd; + return TRACE_SUC1 ("dh=%p", *r_dh); +} |