Gan likun / mbed-dev11

platform/Stream.cpp@0:06036f8bee2d, 2022-10-24 (annotated)

Committer:
ganlikun
Date:
Mon Oct 24 15:19:39 2022 +0000
Revision:
0:06036f8bee2d
11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:06036f8bee2d 1 /* mbed Microcontroller Library
ganlikun 0:06036f8bee2d 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:06036f8bee2d 3 *
ganlikun 0:06036f8bee2d 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:06036f8bee2d 5 * you may not use this file except in compliance with the License.
ganlikun 0:06036f8bee2d 6 * You may obtain a copy of the License at
ganlikun 0:06036f8bee2d 7 *
ganlikun 0:06036f8bee2d 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:06036f8bee2d 9 *
ganlikun 0:06036f8bee2d 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:06036f8bee2d 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:06036f8bee2d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:06036f8bee2d 13 * See the License for the specific language governing permissions and
ganlikun 0:06036f8bee2d 14 * limitations under the License.
ganlikun 0:06036f8bee2d 15 */
ganlikun 0:06036f8bee2d 16 #include "platform/Stream.h"
ganlikun 0:06036f8bee2d 17 #include "platform/mbed_error.h"
ganlikun 0:06036f8bee2d 18 #include <errno.h>
ganlikun 0:06036f8bee2d 19
ganlikun 0:06036f8bee2d 20 namespace mbed {
ganlikun 0:06036f8bee2d 21
ganlikun 0:06036f8bee2d 22 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
ganlikun 0:06036f8bee2d 23 // No lock needed in constructor
ganlikun 0:06036f8bee2d 24 /* open ourselves */
ganlikun 0:06036f8bee2d 25 _file = fdopen(this, "w+");
ganlikun 0:06036f8bee2d 26 // fdopen() will make us buffered because Stream::isatty()
ganlikun 0:06036f8bee2d 27 // wrongly returns zero which is not being changed for
ganlikun 0:06036f8bee2d 28 // backward compatibility
ganlikun 0:06036f8bee2d 29 if (_file) {
ganlikun 0:06036f8bee2d 30 mbed_set_unbuffered_stream(_file);
ganlikun 0:06036f8bee2d 31 } else {
ganlikun 0:06036f8bee2d 32 error("Stream obj failure, errno=%d\r\n", errno);
ganlikun 0:06036f8bee2d 33 }
ganlikun 0:06036f8bee2d 34 }
ganlikun 0:06036f8bee2d 35
ganlikun 0:06036f8bee2d 36 Stream::~Stream() {
ganlikun 0:06036f8bee2d 37 // No lock can be used in destructor
ganlikun 0:06036f8bee2d 38 fclose(_file);
ganlikun 0:06036f8bee2d 39 }
ganlikun 0:06036f8bee2d 40
ganlikun 0:06036f8bee2d 41 int Stream::putc(int c) {
ganlikun 0:06036f8bee2d 42 lock();
ganlikun 0:06036f8bee2d 43 fflush(_file);
ganlikun 0:06036f8bee2d 44 int ret = std::fputc(c, _file);
ganlikun 0:06036f8bee2d 45 unlock();
ganlikun 0:06036f8bee2d 46 return ret;
ganlikun 0:06036f8bee2d 47 }
ganlikun 0:06036f8bee2d 48 int Stream::puts(const char *s) {
ganlikun 0:06036f8bee2d 49 lock();
ganlikun 0:06036f8bee2d 50 fflush(_file);
ganlikun 0:06036f8bee2d 51 int ret = std::fputs(s, _file);
ganlikun 0:06036f8bee2d 52 unlock();
ganlikun 0:06036f8bee2d 53 return ret;
ganlikun 0:06036f8bee2d 54 }
ganlikun 0:06036f8bee2d 55 int Stream::getc() {
ganlikun 0:06036f8bee2d 56 lock();
ganlikun 0:06036f8bee2d 57 fflush(_file);
ganlikun 0:06036f8bee2d 58 int ret = mbed_getc(_file);
ganlikun 0:06036f8bee2d 59 unlock();
ganlikun 0:06036f8bee2d 60 return ret;
ganlikun 0:06036f8bee2d 61 }
ganlikun 0:06036f8bee2d 62 char* Stream::gets(char *s, int size) {
ganlikun 0:06036f8bee2d 63 lock();
ganlikun 0:06036f8bee2d 64 fflush(_file);
ganlikun 0:06036f8bee2d 65 char *ret = mbed_gets(s,size,_file);
ganlikun 0:06036f8bee2d 66 unlock();
ganlikun 0:06036f8bee2d 67 return ret;
ganlikun 0:06036f8bee2d 68 }
ganlikun 0:06036f8bee2d 69
ganlikun 0:06036f8bee2d 70 int Stream::close() {
ganlikun 0:06036f8bee2d 71 return 0;
ganlikun 0:06036f8bee2d 72 }
ganlikun 0:06036f8bee2d 73
ganlikun 0:06036f8bee2d 74 ssize_t Stream::write(const void* buffer, size_t length) {
ganlikun 0:06036f8bee2d 75 const char* ptr = (const char*)buffer;
ganlikun 0:06036f8bee2d 76 const char* end = ptr + length;
ganlikun 0:06036f8bee2d 77
ganlikun 0:06036f8bee2d 78 lock();
ganlikun 0:06036f8bee2d 79 while (ptr != end) {
ganlikun 0:06036f8bee2d 80 if (_putc(*ptr++) == EOF) {
ganlikun 0:06036f8bee2d 81 break;
ganlikun 0:06036f8bee2d 82 }
ganlikun 0:06036f8bee2d 83 }
ganlikun 0:06036f8bee2d 84 unlock();
ganlikun 0:06036f8bee2d 85
ganlikun 0:06036f8bee2d 86 return ptr - (const char*)buffer;
ganlikun 0:06036f8bee2d 87 }
ganlikun 0:06036f8bee2d 88
ganlikun 0:06036f8bee2d 89 ssize_t Stream::read(void* buffer, size_t length) {
ganlikun 0:06036f8bee2d 90 char* ptr = (char*)buffer;
ganlikun 0:06036f8bee2d 91 char* end = ptr + length;
ganlikun 0:06036f8bee2d 92
ganlikun 0:06036f8bee2d 93 lock();
ganlikun 0:06036f8bee2d 94 while (ptr != end) {
ganlikun 0:06036f8bee2d 95 int c = _getc();
ganlikun 0:06036f8bee2d 96 if (c==EOF) break;
ganlikun 0:06036f8bee2d 97 *ptr++ = c;
ganlikun 0:06036f8bee2d 98 }
ganlikun 0:06036f8bee2d 99 unlock();
ganlikun 0:06036f8bee2d 100
ganlikun 0:06036f8bee2d 101 return ptr - (const char*)buffer;
ganlikun 0:06036f8bee2d 102 }
ganlikun 0:06036f8bee2d 103
ganlikun 0:06036f8bee2d 104 off_t Stream::seek(off_t offset, int whence) {
ganlikun 0:06036f8bee2d 105 return 0;
ganlikun 0:06036f8bee2d 106 }
ganlikun 0:06036f8bee2d 107
ganlikun 0:06036f8bee2d 108 off_t Stream::tell() {
ganlikun 0:06036f8bee2d 109 return 0;
ganlikun 0:06036f8bee2d 110 }
ganlikun 0:06036f8bee2d 111
ganlikun 0:06036f8bee2d 112 void Stream::rewind() {
ganlikun 0:06036f8bee2d 113 }
ganlikun 0:06036f8bee2d 114
ganlikun 0:06036f8bee2d 115 int Stream::isatty() {
ganlikun 0:06036f8bee2d 116 return 0;
ganlikun 0:06036f8bee2d 117 }
ganlikun 0:06036f8bee2d 118
ganlikun 0:06036f8bee2d 119 int Stream::sync() {
ganlikun 0:06036f8bee2d 120 return 0;
ganlikun 0:06036f8bee2d 121 }
ganlikun 0:06036f8bee2d 122
ganlikun 0:06036f8bee2d 123 off_t Stream::size() {
ganlikun 0:06036f8bee2d 124 return 0;
ganlikun 0:06036f8bee2d 125 }
ganlikun 0:06036f8bee2d 126
ganlikun 0:06036f8bee2d 127 int Stream::printf(const char* format, ...) {
ganlikun 0:06036f8bee2d 128 lock();
ganlikun 0:06036f8bee2d 129 std::va_list arg;
ganlikun 0:06036f8bee2d 130 va_start(arg, format);
ganlikun 0:06036f8bee2d 131 fflush(_file);
ganlikun 0:06036f8bee2d 132 int r = vfprintf(_file, format, arg);
ganlikun 0:06036f8bee2d 133 va_end(arg);
ganlikun 0:06036f8bee2d 134 unlock();
ganlikun 0:06036f8bee2d 135 return r;
ganlikun 0:06036f8bee2d 136 }
ganlikun 0:06036f8bee2d 137
ganlikun 0:06036f8bee2d 138 int Stream::scanf(const char* format, ...) {
ganlikun 0:06036f8bee2d 139 lock();
ganlikun 0:06036f8bee2d 140 std::va_list arg;
ganlikun 0:06036f8bee2d 141 va_start(arg, format);
ganlikun 0:06036f8bee2d 142 fflush(_file);
ganlikun 0:06036f8bee2d 143 int r = vfscanf(_file, format, arg);
ganlikun 0:06036f8bee2d 144 va_end(arg);
ganlikun 0:06036f8bee2d 145 unlock();
ganlikun 0:06036f8bee2d 146 return r;
ganlikun 0:06036f8bee2d 147 }
ganlikun 0:06036f8bee2d 148
ganlikun 0:06036f8bee2d 149 int Stream::vprintf(const char* format, std::va_list args) {
ganlikun 0:06036f8bee2d 150 lock();
ganlikun 0:06036f8bee2d 151 fflush(_file);
ganlikun 0:06036f8bee2d 152 int r = vfprintf(_file, format, args);
ganlikun 0:06036f8bee2d 153 unlock();
ganlikun 0:06036f8bee2d 154 return r;
ganlikun 0:06036f8bee2d 155 }
ganlikun 0:06036f8bee2d 156
ganlikun 0:06036f8bee2d 157 int Stream::vscanf(const char* format, std::va_list args) {
ganlikun 0:06036f8bee2d 158 lock();
ganlikun 0:06036f8bee2d 159 fflush(_file);
ganlikun 0:06036f8bee2d 160 int r = vfscanf(_file, format, args);
ganlikun 0:06036f8bee2d 161 unlock();
ganlikun 0:06036f8bee2d 162 return r;
ganlikun 0:06036f8bee2d 163 }
ganlikun 0:06036f8bee2d 164
ganlikun 0:06036f8bee2d 165 } // namespace mbed
ganlikun 0:06036f8bee2d 166