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https://github.com/RetroShare/RetroShare.git
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7d06d19e40
git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-OpenPGP@5048 b45a01b8-16f6-495d-af2f-9b41ad6348cc
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
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* Copyright (c) 2005-2008 Nominet UK (www.nic.uk)
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* All rights reserved.
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* Contributors: Ben Laurie, Rachel Willmer. The Contributors have asserted
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* their moral rights under the UK Copyright Design and Patents Act 1988 to
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* be recorded as the authors of this copyright work.
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License.
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*
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/** \file
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*/
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#include <openpgpsdk/util.h>
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#include <openpgpsdk/packet-parse.h>
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#include <openpgpsdk/crypto.h>
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#include <openpgpsdk/create.h>
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#include <openpgpsdk/errors.h>
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#include <stdio.h>
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#include <assert.h>
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#ifndef WIN32
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#include <unistd.h>
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#endif
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#include <string.h>
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#include <openpgpsdk/final.h>
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/** Arguments for reader_fd
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*/
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typedef struct
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{
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int fd; /*!< file descriptor */
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} reader_fd_arg_t;
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/**
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* \ingroup Core_Readers
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*
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* ops_reader_fd() attempts to read up to "plength" bytes from the file
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* descriptor in "parse_info" into the buffer starting at "dest" using the
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* rules contained in "flags"
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*
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* \param dest Pointer to previously allocated buffer
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* \param plength Number of bytes to try to read
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* \param flags Rules about reading to use
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* \param parse_info Gets cast to ops_reader_fd_arg_t
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*
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* \return OPS_R_EOF if no bytes were read
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* \return OPS_R_PARTIAL_READ if not enough bytes were read, and OPS_RETURN_LENGTH is set in "flags"
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* \return OPS_R_EARLY_EOF if not enough bytes were read, and OPS_RETURN_LENGTH was not set in "flags"
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* \return OPS_R_OK if expected length was read
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* \return OPS_R_ERROR if cannot read
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*
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* OPS_R_EARLY_EOF and OPS_R_ERROR push errors on the stack
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*
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* \sa enum opt_reader_ret_t
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*
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* \todo change arg_ to typesafe?
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*/
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static int fd_reader(void *dest,size_t length,ops_error_t **errors,
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ops_reader_info_t *rinfo,ops_parse_cb_info_t *cbinfo)
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{
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reader_fd_arg_t *arg=ops_reader_get_arg(rinfo);
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int n=read(arg->fd,dest,length);
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OPS_USED(cbinfo);
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if(n == 0)
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return 0;
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if(n < 0)
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{
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OPS_SYSTEM_ERROR_1(errors,OPS_E_R_READ_FAILED,"read",
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"file descriptor %d",arg->fd);
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return -1;
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}
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return n;
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}
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static void fd_destroyer(ops_reader_info_t *rinfo)
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{ free(ops_reader_get_arg(rinfo)); }
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/**
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\ingroup Core_Readers_First
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\brief Starts stack with file reader
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*/
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void ops_reader_set_fd(ops_parse_info_t *pinfo,int fd)
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{
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reader_fd_arg_t *arg=malloc(sizeof *arg);
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arg->fd=fd;
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ops_reader_set(pinfo,fd_reader,fd_destroyer,arg);
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}
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// eof
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