Gan likun / mbed-dev

00

platform/Stream.cpp@0:13413ea9a877, 2022-06-12 (annotated)

Committer:
ganlikun
Date:
Sun Jun 12 14:02:44 2022 +0000
Revision:
0:13413ea9a877
00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:13413ea9a877 1 /* mbed Microcontroller Library
ganlikun 0:13413ea9a877 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:13413ea9a877 3 *
ganlikun 0:13413ea9a877 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:13413ea9a877 5 * you may not use this file except in compliance with the License.
ganlikun 0:13413ea9a877 6 * You may obtain a copy of the License at
ganlikun 0:13413ea9a877 7 *
ganlikun 0:13413ea9a877 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:13413ea9a877 9 *
ganlikun 0:13413ea9a877 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:13413ea9a877 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:13413ea9a877 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:13413ea9a877 13 * See the License for the specific language governing permissions and
ganlikun 0:13413ea9a877 14 * limitations under the License.
ganlikun 0:13413ea9a877 15 */
ganlikun 0:13413ea9a877 16 #include "platform/Stream.h"
ganlikun 0:13413ea9a877 17 #include "platform/mbed_error.h"
ganlikun 0:13413ea9a877 18 #include <errno.h>
ganlikun 0:13413ea9a877 19
ganlikun 0:13413ea9a877 20 namespace mbed {
ganlikun 0:13413ea9a877 21
ganlikun 0:13413ea9a877 22 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
ganlikun 0:13413ea9a877 23 // No lock needed in constructor
ganlikun 0:13413ea9a877 24 /* open ourselves */
ganlikun 0:13413ea9a877 25 _file = fdopen(this, "w+");
ganlikun 0:13413ea9a877 26 // fdopen() will make us buffered because Stream::isatty()
ganlikun 0:13413ea9a877 27 // wrongly returns zero which is not being changed for
ganlikun 0:13413ea9a877 28 // backward compatibility
ganlikun 0:13413ea9a877 29 if (_file) {
ganlikun 0:13413ea9a877 30 mbed_set_unbuffered_stream(_file);
ganlikun 0:13413ea9a877 31 } else {
ganlikun 0:13413ea9a877 32 error("Stream obj failure, errno=%d\r\n", errno);
ganlikun 0:13413ea9a877 33 }
ganlikun 0:13413ea9a877 34 }
ganlikun 0:13413ea9a877 35
ganlikun 0:13413ea9a877 36 Stream::~Stream() {
ganlikun 0:13413ea9a877 37 // No lock can be used in destructor
ganlikun 0:13413ea9a877 38 fclose(_file);
ganlikun 0:13413ea9a877 39 }
ganlikun 0:13413ea9a877 40
ganlikun 0:13413ea9a877 41 int Stream::putc(int c) {
ganlikun 0:13413ea9a877 42 lock();
ganlikun 0:13413ea9a877 43 fflush(_file);
ganlikun 0:13413ea9a877 44 int ret = std::fputc(c, _file);
ganlikun 0:13413ea9a877 45 unlock();
ganlikun 0:13413ea9a877 46 return ret;
ganlikun 0:13413ea9a877 47 }
ganlikun 0:13413ea9a877 48 int Stream::puts(const char *s) {
ganlikun 0:13413ea9a877 49 lock();
ganlikun 0:13413ea9a877 50 fflush(_file);
ganlikun 0:13413ea9a877 51 int ret = std::fputs(s, _file);
ganlikun 0:13413ea9a877 52 unlock();
ganlikun 0:13413ea9a877 53 return ret;
ganlikun 0:13413ea9a877 54 }
ganlikun 0:13413ea9a877 55 int Stream::getc() {
ganlikun 0:13413ea9a877 56 lock();
ganlikun 0:13413ea9a877 57 fflush(_file);
ganlikun 0:13413ea9a877 58 int ret = mbed_getc(_file);
ganlikun 0:13413ea9a877 59 unlock();
ganlikun 0:13413ea9a877 60 return ret;
ganlikun 0:13413ea9a877 61 }
ganlikun 0:13413ea9a877 62 char* Stream::gets(char *s, int size) {
ganlikun 0:13413ea9a877 63 lock();
ganlikun 0:13413ea9a877 64 fflush(_file);
ganlikun 0:13413ea9a877 65 char *ret = mbed_gets(s,size,_file);
ganlikun 0:13413ea9a877 66 unlock();
ganlikun 0:13413ea9a877 67 return ret;
ganlikun 0:13413ea9a877 68 }
ganlikun 0:13413ea9a877 69
ganlikun 0:13413ea9a877 70 int Stream::close() {
ganlikun 0:13413ea9a877 71 return 0;
ganlikun 0:13413ea9a877 72 }
ganlikun 0:13413ea9a877 73
ganlikun 0:13413ea9a877 74 ssize_t Stream::write(const void* buffer, size_t length) {
ganlikun 0:13413ea9a877 75 const char* ptr = (const char*)buffer;
ganlikun 0:13413ea9a877 76 const char* end = ptr + length;
ganlikun 0:13413ea9a877 77
ganlikun 0:13413ea9a877 78 lock();
ganlikun 0:13413ea9a877 79 while (ptr != end) {
ganlikun 0:13413ea9a877 80 if (_putc(*ptr++) == EOF) {
ganlikun 0:13413ea9a877 81 break;
ganlikun 0:13413ea9a877 82 }
ganlikun 0:13413ea9a877 83 }
ganlikun 0:13413ea9a877 84 unlock();
ganlikun 0:13413ea9a877 85
ganlikun 0:13413ea9a877 86 return ptr - (const char*)buffer;
ganlikun 0:13413ea9a877 87 }
ganlikun 0:13413ea9a877 88
ganlikun 0:13413ea9a877 89 ssize_t Stream::read(void* buffer, size_t length) {
ganlikun 0:13413ea9a877 90 char* ptr = (char*)buffer;
ganlikun 0:13413ea9a877 91 char* end = ptr + length;
ganlikun 0:13413ea9a877 92
ganlikun 0:13413ea9a877 93 lock();
ganlikun 0:13413ea9a877 94 while (ptr != end) {
ganlikun 0:13413ea9a877 95 int c = _getc();
ganlikun 0:13413ea9a877 96 if (c==EOF) break;
ganlikun 0:13413ea9a877 97 *ptr++ = c;
ganlikun 0:13413ea9a877 98 }
ganlikun 0:13413ea9a877 99 unlock();
ganlikun 0:13413ea9a877 100
ganlikun 0:13413ea9a877 101 return ptr - (const char*)buffer;
ganlikun 0:13413ea9a877 102 }
ganlikun 0:13413ea9a877 103
ganlikun 0:13413ea9a877 104 off_t Stream::seek(off_t offset, int whence) {
ganlikun 0:13413ea9a877 105 return 0;
ganlikun 0:13413ea9a877 106 }
ganlikun 0:13413ea9a877 107
ganlikun 0:13413ea9a877 108 off_t Stream::tell() {
ganlikun 0:13413ea9a877 109 return 0;
ganlikun 0:13413ea9a877 110 }
ganlikun 0:13413ea9a877 111
ganlikun 0:13413ea9a877 112 void Stream::rewind() {
ganlikun 0:13413ea9a877 113 }
ganlikun 0:13413ea9a877 114
ganlikun 0:13413ea9a877 115 int Stream::isatty() {
ganlikun 0:13413ea9a877 116 return 0;
ganlikun 0:13413ea9a877 117 }
ganlikun 0:13413ea9a877 118
ganlikun 0:13413ea9a877 119 int Stream::sync() {
ganlikun 0:13413ea9a877 120 return 0;
ganlikun 0:13413ea9a877 121 }
ganlikun 0:13413ea9a877 122
ganlikun 0:13413ea9a877 123 off_t Stream::size() {
ganlikun 0:13413ea9a877 124 return 0;
ganlikun 0:13413ea9a877 125 }
ganlikun 0:13413ea9a877 126
ganlikun 0:13413ea9a877 127 int Stream::printf(const char* format, ...) {
ganlikun 0:13413ea9a877 128 lock();
ganlikun 0:13413ea9a877 129 std::va_list arg;
ganlikun 0:13413ea9a877 130 va_start(arg, format);
ganlikun 0:13413ea9a877 131 fflush(_file);
ganlikun 0:13413ea9a877 132 int r = vfprintf(_file, format, arg);
ganlikun 0:13413ea9a877 133 va_end(arg);
ganlikun 0:13413ea9a877 134 unlock();
ganlikun 0:13413ea9a877 135 return r;
ganlikun 0:13413ea9a877 136 }
ganlikun 0:13413ea9a877 137
ganlikun 0:13413ea9a877 138 int Stream::scanf(const char* format, ...) {
ganlikun 0:13413ea9a877 139 lock();
ganlikun 0:13413ea9a877 140 std::va_list arg;
ganlikun 0:13413ea9a877 141 va_start(arg, format);
ganlikun 0:13413ea9a877 142 fflush(_file);
ganlikun 0:13413ea9a877 143 int r = vfscanf(_file, format, arg);
ganlikun 0:13413ea9a877 144 va_end(arg);
ganlikun 0:13413ea9a877 145 unlock();
ganlikun 0:13413ea9a877 146 return r;
ganlikun 0:13413ea9a877 147 }
ganlikun 0:13413ea9a877 148
ganlikun 0:13413ea9a877 149 int Stream::vprintf(const char* format, std::va_list args) {
ganlikun 0:13413ea9a877 150 lock();
ganlikun 0:13413ea9a877 151 fflush(_file);
ganlikun 0:13413ea9a877 152 int r = vfprintf(_file, format, args);
ganlikun 0:13413ea9a877 153 unlock();
ganlikun 0:13413ea9a877 154 return r;
ganlikun 0:13413ea9a877 155 }
ganlikun 0:13413ea9a877 156
ganlikun 0:13413ea9a877 157 int Stream::vscanf(const char* format, std::va_list args) {
ganlikun 0:13413ea9a877 158 lock();
ganlikun 0:13413ea9a877 159 fflush(_file);
ganlikun 0:13413ea9a877 160 int r = vfscanf(_file, format, args);
ganlikun 0:13413ea9a877 161 unlock();
ganlikun 0:13413ea9a877 162 return r;
ganlikun 0:13413ea9a877 163 }
ganlikun 0:13413ea9a877 164
ganlikun 0:13413ea9a877 165 } // namespace mbed
ganlikun 0:13413ea9a877 166