diff options
Diffstat (limited to 'libtdenetwork/libgpgme-copy/gpgme/data-compat.c')
| -rw-r--r-- | libtdenetwork/libgpgme-copy/gpgme/data-compat.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/libtdenetwork/libgpgme-copy/gpgme/data-compat.c b/libtdenetwork/libgpgme-copy/gpgme/data-compat.c new file mode 100644 index 00000000..37cb4ff5 --- /dev/null +++ b/libtdenetwork/libgpgme-copy/gpgme/data-compat.c @@ -0,0 +1,209 @@ +/* data-compat.c - Compatibility interfaces for data objects. + Copyright (C) 2002, 2003, 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., 51 Franklin Street, Fifth Floor, Boston, MA + 02110-1301, USA. */ + +#if HAVE_CONFIG_H +#include <config.h> +#endif + +#include <errno.h> +#include <sys/time.h> +#include <sys/stat.h> +#include <stdlib.h> + +#include "data.h" +#include "util.h" + + +/* Create a new data buffer filled with LENGTH bytes starting from + OFFSET within the file FNAME or stream STREAM (exactly one must be + non-zero). */ +gpgme_error_t +gpgme_data_new_from_filepart (gpgme_data_t *dh, const char *fname, + FILE *stream, off_t offset, size_t length) +{ + gpgme_error_t err; + char *buf = NULL; + int res; + + if (stream && fname) + return gpg_error (GPG_ERR_INV_VALUE); + + if (fname) + stream = fopen (fname, "rb"); + if (!stream) + return gpg_error_from_errno (errno); + +#ifdef HAVE_FSEEKO + res = fseeko (stream, offset, SEEK_SET); +#else + /* FIXME: Check for overflow, or at least bail at compilation. */ + res = fseek (stream, offset, SEEK_SET); +#endif + + if (res) + { + int saved_errno = errno; + if (fname) + fclose (stream); + return gpg_error_from_errno (saved_errno); + } + + buf = malloc (length); + if (!buf) + { + int saved_errno = errno; + if (fname) + fclose (stream); + return gpg_error_from_errno (saved_errno); + } + + while (fread (buf, length, 1, stream) < 1 + && ferror (stream) && errno == EINTR); + if (ferror (stream)) + { + int saved_errno = errno; + if (buf) + free (buf); + if (fname) + fclose (stream); + return gpg_error_from_errno (saved_errno); + } + + if (fname) + fclose (stream); + + err = gpgme_data_new (dh); + if (err) + { + if (buf) + free (buf); + return err; + } + + (*dh)->data.mem.buffer = buf; + (*dh)->data.mem.size = length; + (*dh)->data.mem.length = length; + return 0; +} + + +/* Create a new data buffer filled with the content of file FNAME. + COPY must be non-zero (delayed reads are not supported yet). */ +gpgme_error_t +gpgme_data_new_from_file (gpgme_data_t *dh, const char *fname, int copy) +{ + struct stat statbuf; + + if (!fname || !copy) + return gpg_error (GPG_ERR_INV_VALUE); + + if (stat (fname, &statbuf) < 0) + return gpg_error_from_errno (errno); + + return gpgme_data_new_from_filepart (dh, fname, NULL, 0, statbuf.st_size); +} + + +static int +gpgme_error_to_errno (gpgme_error_t err) +{ + int no = gpg_err_code_to_errno (err); + + if (no) + { + errno = no; + return -1; + } + + switch (gpg_err_code (err)) + { + case GPG_ERR_EOF: + return 0; + case GPG_ERR_INV_VALUE: + errno = EINVAL; + return -1; + case GPG_ERR_NOT_SUPPORTED: + errno = ENOSYS; + return -1; + default: + /* FIXME: Yeah, well. */ + errno = EINVAL; + return -1; + } +} + + +static ssize_t +old_user_read (gpgme_data_t dh, void *buffer, size_t size) +{ + size_t amt; + gpgme_error_t err = (*dh->data.old_user.cb) (dh->data.old_user.handle, + buffer, size, &amt); + if (err) + return gpgme_error_to_errno (err); + return amt; +} + + +static off_t +old_user_seek (gpgme_data_t dh, off_t offset, int whence) +{ + gpgme_error_t err; + if (whence != SEEK_SET || offset) + return EINVAL; + err = (*dh->data.old_user.cb) (dh->data.old_user.handle, NULL, 0, NULL); + if (err) + return gpgme_error_to_errno (err); + return 0; +} + + +static struct _gpgme_data_cbs old_user_cbs = + { + old_user_read, + NULL, + old_user_seek, + NULL + }; + + +/* Create a new data buffer which retrieves the data from the callback + function READ_CB. */ +gpgme_error_t +gpgme_data_new_with_read_cb (gpgme_data_t *dh, + int (*read_cb) (void *, char *, size_t, size_t *), + void *read_cb_value) +{ + gpgme_error_t err = _gpgme_data_new (dh, &old_user_cbs); + if (err) + return err; + + (*dh)->data.old_user.cb = read_cb; + (*dh)->data.old_user.handle = read_cb_value; + return 0; +} + + +gpgme_error_t +gpgme_data_rewind (gpgme_data_t dh) +{ + return (gpgme_data_seek (dh, 0, SEEK_SET) == -1) + ? gpg_error_from_errno (errno) : 0; +} |