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- /*
- * Copyright (C) 2007 The Android Open Source Project
- *
- * 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.
- */
- #ifndef HAVE_SYS_UIO_H
- #include <cutils/uio.h>
- #include <unistd.h>
- int readv( int fd, struct iovec* vecs, int count )
- {
- int total = 0;
- for ( ; count > 0; count--, vecs++ ) {
- const char* buf = vecs->iov_base;
- int len = vecs->iov_len;
- while (len > 0) {
- int ret = read( fd, buf, len );
- if (ret < 0) {
- if (total == 0)
- total = -1;
- goto Exit;
- }
- if (ret == 0)
- goto Exit;
- total += ret;
- buf += ret;
- len -= ret;
- }
- }
- Exit:
- return total;
- }
- int writev( int fd, const struct iovec* vecs, int count )
- {
- int total = 0;
- for ( ; count > 0; count--, vecs++ ) {
- const char* buf = (const char*)vecs->iov_base;
- int len = (int)vecs->iov_len;
- while (len > 0) {
- int ret = write( fd, buf, len );
- if (ret < 0) {
- if (total == 0)
- total = -1;
- goto Exit;
- }
- if (ret == 0)
- goto Exit;
- total += ret;
- buf += ret;
- len -= ret;
- }
- }
- Exit:
- return total;
- }
- #endif /* !HAVE_SYS_UIO_H */
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