Nicolas Borla / Mbed OS ROME2_Robot_Firmware

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mbed-os/platform/Stream.cpp@0:4beb2ea291ec, 2020-03-16 (annotated)

Committer:
boro
Date:
Mon Mar 16 13:12:31 2020 +0000
Revision:
0:4beb2ea291ec
a

Who changed what in which revision?

UserRevisionLine numberNew contents of line
boro 0:4beb2ea291ec 1 /* mbed Microcontroller Library
boro 0:4beb2ea291ec 2 * Copyright (c) 2006-2013 ARM Limited
boro 0:4beb2ea291ec 3 *
boro 0:4beb2ea291ec 4 * Licensed under the Apache License, Version 2.0 (the "License");
boro 0:4beb2ea291ec 5 * you may not use this file except in compliance with the License.
boro 0:4beb2ea291ec 6 * You may obtain a copy of the License at
boro 0:4beb2ea291ec 7 *
boro 0:4beb2ea291ec 8 * http://www.apache.org/licenses/LICENSE-2.0
boro 0:4beb2ea291ec 9 *
boro 0:4beb2ea291ec 10 * Unless required by applicable law or agreed to in writing, software
boro 0:4beb2ea291ec 11 * distributed under the License is distributed on an "AS IS" BASIS,
boro 0:4beb2ea291ec 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
boro 0:4beb2ea291ec 13 * See the License for the specific language governing permissions and
boro 0:4beb2ea291ec 14 * limitations under the License.
boro 0:4beb2ea291ec 15 */
boro 0:4beb2ea291ec 16 #include "platform/Stream.h"
boro 0:4beb2ea291ec 17 #include "platform/mbed_error.h"
boro 0:4beb2ea291ec 18 #include <errno.h>
boro 0:4beb2ea291ec 19
boro 0:4beb2ea291ec 20 namespace mbed {
boro 0:4beb2ea291ec 21
boro 0:4beb2ea291ec 22 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
boro 0:4beb2ea291ec 23 // No lock needed in constructor
boro 0:4beb2ea291ec 24 /* open ourselves */
boro 0:4beb2ea291ec 25 _file = fdopen(this, "w+");
boro 0:4beb2ea291ec 26 // fdopen() will make us buffered because Stream::isatty()
boro 0:4beb2ea291ec 27 // wrongly returns zero which is not being changed for
boro 0:4beb2ea291ec 28 // backward compatibility
boro 0:4beb2ea291ec 29 if (_file) {
boro 0:4beb2ea291ec 30 mbed_set_unbuffered_stream(_file);
boro 0:4beb2ea291ec 31 } else {
boro 0:4beb2ea291ec 32 error("Stream obj failure, errno=%d\r\n", errno);
boro 0:4beb2ea291ec 33 }
boro 0:4beb2ea291ec 34 }
boro 0:4beb2ea291ec 35
boro 0:4beb2ea291ec 36 Stream::~Stream() {
boro 0:4beb2ea291ec 37 // No lock can be used in destructor
boro 0:4beb2ea291ec 38 fclose(_file);
boro 0:4beb2ea291ec 39 }
boro 0:4beb2ea291ec 40
boro 0:4beb2ea291ec 41 int Stream::putc(int c) {
boro 0:4beb2ea291ec 42 lock();
boro 0:4beb2ea291ec 43 fflush(_file);
boro 0:4beb2ea291ec 44 int ret = std::fputc(c, _file);
boro 0:4beb2ea291ec 45 unlock();
boro 0:4beb2ea291ec 46 return ret;
boro 0:4beb2ea291ec 47 }
boro 0:4beb2ea291ec 48 int Stream::puts(const char *s) {
boro 0:4beb2ea291ec 49 lock();
boro 0:4beb2ea291ec 50 fflush(_file);
boro 0:4beb2ea291ec 51 int ret = std::fputs(s, _file);
boro 0:4beb2ea291ec 52 unlock();
boro 0:4beb2ea291ec 53 return ret;
boro 0:4beb2ea291ec 54 }
boro 0:4beb2ea291ec 55 int Stream::getc() {
boro 0:4beb2ea291ec 56 lock();
boro 0:4beb2ea291ec 57 fflush(_file);
boro 0:4beb2ea291ec 58 int ret = mbed_getc(_file);
boro 0:4beb2ea291ec 59 unlock();
boro 0:4beb2ea291ec 60 return ret;
boro 0:4beb2ea291ec 61 }
boro 0:4beb2ea291ec 62 char* Stream::gets(char *s, int size) {
boro 0:4beb2ea291ec 63 lock();
boro 0:4beb2ea291ec 64 fflush(_file);
boro 0:4beb2ea291ec 65 char *ret = mbed_gets(s,size,_file);
boro 0:4beb2ea291ec 66 unlock();
boro 0:4beb2ea291ec 67 return ret;
boro 0:4beb2ea291ec 68 }
boro 0:4beb2ea291ec 69
boro 0:4beb2ea291ec 70 int Stream::close() {
boro 0:4beb2ea291ec 71 return 0;
boro 0:4beb2ea291ec 72 }
boro 0:4beb2ea291ec 73
boro 0:4beb2ea291ec 74 ssize_t Stream::write(const void* buffer, size_t length) {
boro 0:4beb2ea291ec 75 const char* ptr = (const char*)buffer;
boro 0:4beb2ea291ec 76 const char* end = ptr + length;
boro 0:4beb2ea291ec 77
boro 0:4beb2ea291ec 78 lock();
boro 0:4beb2ea291ec 79 while (ptr != end) {
boro 0:4beb2ea291ec 80 if (_putc(*ptr++) == EOF) {
boro 0:4beb2ea291ec 81 break;
boro 0:4beb2ea291ec 82 }
boro 0:4beb2ea291ec 83 }
boro 0:4beb2ea291ec 84 unlock();
boro 0:4beb2ea291ec 85
boro 0:4beb2ea291ec 86 return ptr - (const char*)buffer;
boro 0:4beb2ea291ec 87 }
boro 0:4beb2ea291ec 88
boro 0:4beb2ea291ec 89 ssize_t Stream::read(void* buffer, size_t length) {
boro 0:4beb2ea291ec 90 char* ptr = (char*)buffer;
boro 0:4beb2ea291ec 91 char* end = ptr + length;
boro 0:4beb2ea291ec 92
boro 0:4beb2ea291ec 93 lock();
boro 0:4beb2ea291ec 94 while (ptr != end) {
boro 0:4beb2ea291ec 95 int c = _getc();
boro 0:4beb2ea291ec 96 if (c==EOF) break;
boro 0:4beb2ea291ec 97 *ptr++ = c;
boro 0:4beb2ea291ec 98 }
boro 0:4beb2ea291ec 99 unlock();
boro 0:4beb2ea291ec 100
boro 0:4beb2ea291ec 101 return ptr - (const char*)buffer;
boro 0:4beb2ea291ec 102 }
boro 0:4beb2ea291ec 103
boro 0:4beb2ea291ec 104 off_t Stream::seek(off_t offset, int whence) {
boro 0:4beb2ea291ec 105 return 0;
boro 0:4beb2ea291ec 106 }
boro 0:4beb2ea291ec 107
boro 0:4beb2ea291ec 108 off_t Stream::tell() {
boro 0:4beb2ea291ec 109 return 0;
boro 0:4beb2ea291ec 110 }
boro 0:4beb2ea291ec 111
boro 0:4beb2ea291ec 112 void Stream::rewind() {
boro 0:4beb2ea291ec 113 }
boro 0:4beb2ea291ec 114
boro 0:4beb2ea291ec 115 int Stream::isatty() {
boro 0:4beb2ea291ec 116 return 0;
boro 0:4beb2ea291ec 117 }
boro 0:4beb2ea291ec 118
boro 0:4beb2ea291ec 119 int Stream::sync() {
boro 0:4beb2ea291ec 120 return 0;
boro 0:4beb2ea291ec 121 }
boro 0:4beb2ea291ec 122
boro 0:4beb2ea291ec 123 off_t Stream::size() {
boro 0:4beb2ea291ec 124 return 0;
boro 0:4beb2ea291ec 125 }
boro 0:4beb2ea291ec 126
boro 0:4beb2ea291ec 127 int Stream::printf(const char* format, ...) {
boro 0:4beb2ea291ec 128 lock();
boro 0:4beb2ea291ec 129 std::va_list arg;
boro 0:4beb2ea291ec 130 va_start(arg, format);
boro 0:4beb2ea291ec 131 fflush(_file);
boro 0:4beb2ea291ec 132 int r = vfprintf(_file, format, arg);
boro 0:4beb2ea291ec 133 va_end(arg);
boro 0:4beb2ea291ec 134 unlock();
boro 0:4beb2ea291ec 135 return r;
boro 0:4beb2ea291ec 136 }
boro 0:4beb2ea291ec 137
boro 0:4beb2ea291ec 138 int Stream::scanf(const char* format, ...) {
boro 0:4beb2ea291ec 139 lock();
boro 0:4beb2ea291ec 140 std::va_list arg;
boro 0:4beb2ea291ec 141 va_start(arg, format);
boro 0:4beb2ea291ec 142 fflush(_file);
boro 0:4beb2ea291ec 143 int r = vfscanf(_file, format, arg);
boro 0:4beb2ea291ec 144 va_end(arg);
boro 0:4beb2ea291ec 145 unlock();
boro 0:4beb2ea291ec 146 return r;
boro 0:4beb2ea291ec 147 }
boro 0:4beb2ea291ec 148
boro 0:4beb2ea291ec 149 int Stream::vprintf(const char* format, std::va_list args) {
boro 0:4beb2ea291ec 150 lock();
boro 0:4beb2ea291ec 151 fflush(_file);
boro 0:4beb2ea291ec 152 int r = vfprintf(_file, format, args);
boro 0:4beb2ea291ec 153 unlock();
boro 0:4beb2ea291ec 154 return r;
boro 0:4beb2ea291ec 155 }
boro 0:4beb2ea291ec 156
boro 0:4beb2ea291ec 157 int Stream::vscanf(const char* format, std::va_list args) {
boro 0:4beb2ea291ec 158 lock();
boro 0:4beb2ea291ec 159 fflush(_file);
boro 0:4beb2ea291ec 160 int r = vfscanf(_file, format, args);
boro 0:4beb2ea291ec 161 unlock();
boro 0:4beb2ea291ec 162 return r;
boro 0:4beb2ea291ec 163 }
boro 0:4beb2ea291ec 164
boro 0:4beb2ea291ec 165 } // namespace mbed