diff options
author | Luca Muscariello <lumuscar+fdio@cisco.com> | 2017-02-23 17:01:02 +0100 |
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committer | Luca Muscariello <lumuscar+fdio@cisco.com> | 2017-02-23 17:21:02 +0100 |
commit | ec688b4723a041044226358bcd4dd6e2da39da49 (patch) | |
tree | 3a244c48d1eb9e4d90f9050fd1a61ae5c0327526 /libparc/parc/algol/parc_FileOutputStream.c | |
parent | 9b30fc10fb1cbebe651e5a107e8ca5b24de54675 (diff) |
Initial commit: cframework. Longbow and Libparc
Change-Id: I90378dbd30da6033b20fb1f829b3b822cf366c59
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
Diffstat (limited to 'libparc/parc/algol/parc_FileOutputStream.c')
-rwxr-xr-x | libparc/parc/algol/parc_FileOutputStream.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/libparc/parc/algol/parc_FileOutputStream.c b/libparc/parc/algol/parc_FileOutputStream.c new file mode 100755 index 00000000..a17dc66c --- /dev/null +++ b/libparc/parc/algol/parc_FileOutputStream.c @@ -0,0 +1,85 @@ +/* + * Copyright (c) 2017 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + */ +#include <config.h> + +#include <stdio.h> +#include <unistd.h> + +#include <LongBow/runtime.h> + +#include <parc/algol/parc_FileOutputStream.h> +#include <parc/algol/parc_Object.h> + +PARCOutputStreamInterface *PARCFileOutputStreamAsPARCInputStream = &(PARCOutputStreamInterface) { + .Acquire = (PARCOutputStream * (*)(PARCOutputStream *))parcFileOutputStream_Acquire, + .Release = (void (*)(PARCOutputStream **))parcFileOutputStream_Release, + .Write = (size_t (*)(PARCOutputStream *, PARCBuffer *))parcFileOutputStream_Write +}; + +struct parc_file_output_stream { + int fd; +}; + +static void +_destroy(PARCFileOutputStream **streamPtr) +{ + PARCFileOutputStream *stream = *streamPtr; + + close(stream->fd); +} + +parcObject_ExtendPARCObject(PARCFileOutputStream, _destroy, NULL, NULL, NULL, NULL, NULL, NULL); + +PARCFileOutputStream * +parcFileOutputStream_Create(int fileDescriptor) +{ + assertTrue(fileDescriptor != -1, "Invalid file descriptor"); + + PARCFileOutputStream *result = parcObject_CreateInstance(PARCFileOutputStream); + result->fd = fileDescriptor; + + return result; +} + +PARCOutputStream * +parcFileOutputStream_AsOutputStream(PARCFileOutputStream *fileOutputStream) +{ + return parcOutputStream_Create(parcFileOutputStream_Acquire(fileOutputStream), PARCFileOutputStreamAsPARCInputStream); +} + +parcObject_ImplementAcquire(parcFileOutputStream, PARCFileOutputStream); + +parcObject_ImplementRelease(parcFileOutputStream, PARCFileOutputStream); + +bool +parcFileOutputStream_Write(PARCFileOutputStream *outputStream, PARCBuffer *buffer) +{ + const size_t maximumChunkSize = 1024 * 1024; + + while (parcBuffer_HasRemaining(buffer)) { + size_t remaining = parcBuffer_Remaining(buffer); + size_t chunkSize = remaining > maximumChunkSize ? maximumChunkSize : remaining; + void *buf = parcBuffer_Overlay(buffer, chunkSize); + ssize_t nwritten = write(outputStream->fd, buf, chunkSize); + if (nwritten == -1) { + break; + } + } + + return parcBuffer_HasRemaining(buffer) == false; +} |