140 lines
3.2 KiB
C
140 lines
3.2 KiB
C
/* data.c
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* Copyright (C) 2000 Werner Koch (dd9jn)
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*
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* This file is part of GPGME.
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*
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* GPGME is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* GPGME is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "util.h"
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#include "context.h"
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/**
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* gpgme_new_data:
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* @r_dh: Returns a new data object.
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* @buffer: If not NULL, used to initialize the data object.
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* @size: Size of the buffer
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* @copy: Flag wether a copy of the buffer should be used.
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*
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* Create a new data object and optionally initialize with data
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* from the memory. A @copy with value %TRUE creates a copy of the
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* memory, a value of %FALSE uses the original memory of @buffer and the
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* caller has to make sure that this buffer is valid until gpgme_release_data()
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* is called.
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*
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* Return value:
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**/
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GpgmeError
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gpgme_new_data ( GpgmeData *r_dh, const char *buffer, size_t size, int copy )
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{
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GpgmeData dh;
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*r_dh = NULL;
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dh = xtrycalloc ( 1, sizeof *dh );
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if (!dh)
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return mk_error (Out_Of_Core);
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if ( buffer ) {
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dh->len = size;
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if (copy) {
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dh->private_buffer = xtrymalloc ( size );
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if ( !dh->private_buffer ) {
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xfree (dh);
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return mk_error (Out_Of_Core);
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}
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memcpy (dh->private_buffer, buffer, size );
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dh->data = dh->private_buffer;
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}
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else {
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dh->data = buffer;
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}
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dh->type = GPGME_DATA_TYPE_MEM;
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}
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dh->mode = GPGME_DATA_MODE_INOUT;
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*r_dh = dh;
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return 0;
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}
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/**
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* gpgme_release_data:
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* @dh: Data object
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*
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* Release the data object @dh. @dh may be NULL in which case nothing
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* happens.
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**/
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void
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gpgme_release_data ( GpgmeData dh )
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{
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if (dh) {
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xfree (dh->private_buffer);
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xfree (dh);
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}
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}
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GpgmeDataType
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gpgme_query_data_type ( GpgmeData dh )
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{
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if ( !dh || !dh->data )
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return GPGME_DATA_TYPE_NONE;
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return dh->type;
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}
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void
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_gpgme_set_data_mode ( GpgmeData dh, GpgmeDataMode mode )
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{
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assert (dh);
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dh->mode = mode;
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}
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GpgmeDataMode
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_gpgme_query_data_mode ( GpgmeData dh )
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{
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assert (dh);
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return dh->mode;
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}
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GpgmeError
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_gpgme_append_data ( GpgmeData dh, const char *buf, size_t length )
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{
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assert (dh);
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if ( dh->type == GPGME_DATA_TYPE_NONE ) {
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/* convert it to a mem data type */
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}
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else if ( dh->type != GPGME_DATA_TYPE_MEM ) {
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return mk_error (Invalid_Type);
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}
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if ( dh->mode != GPGME_DATA_MODE_INOUT
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&& dh->mode != GPGME_DATA_MODE_IN )
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return mk_error (Invalid_Mode);
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return 0;
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}
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