zhang boie / mbed-dev-f30333

platform/Stream.cpp@0:bdf663c61a82, 2022-06-14 (annotated)

Committer:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4
Date:
Tue Jun 14 09:21:18 2022 +0000
Revision:
0:bdf663c61a82
lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 1 /* mbed Microcontroller Library
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 2 * Copyright (c) 2006-2013 ARM Limited
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 3 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 4 * Licensed under the Apache License, Version 2.0 (the "License");
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 5 * you may not use this file except in compliance with the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 6 * You may obtain a copy of the License at
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 7 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 8 * http://www.apache.org/licenses/LICENSE-2.0
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 9 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 10 * Unless required by applicable law or agreed to in writing, software
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 11 * distributed under the License is distributed on an "AS IS" BASIS,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 13 * See the License for the specific language governing permissions and
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 14 * limitations under the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 15 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 16 #include "platform/Stream.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 17 #include "platform/mbed_error.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 18 #include <errno.h>
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 19
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 20 namespace mbed {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 21
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 22 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 23 // No lock needed in constructor
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 24 /* open ourselves */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 25 _file = fdopen(this, "w+");
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 26 // fdopen() will make us buffered because Stream::isatty()
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 27 // wrongly returns zero which is not being changed for
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 28 // backward compatibility
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 29 if (_file) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 30 mbed_set_unbuffered_stream(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 31 } else {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 32 error("Stream obj failure, errno=%d\r\n", errno);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 33 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 34 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 35
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 36 Stream::~Stream() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 37 // No lock can be used in destructor
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 38 fclose(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 39 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 40
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 41 int Stream::putc(int c) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 42 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 43 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 44 int ret = std::fputc(c, _file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 45 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 46 return ret;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 47 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 48 int Stream::puts(const char *s) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 49 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 50 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 51 int ret = std::fputs(s, _file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 52 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 53 return ret;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 54 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 55 int Stream::getc() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 56 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 57 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 58 int ret = mbed_getc(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 59 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 60 return ret;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 61 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 62 char* Stream::gets(char *s, int size) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 63 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 64 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 65 char *ret = mbed_gets(s,size,_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 66 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 67 return ret;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 68 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 69
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 70 int Stream::close() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 71 return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 72 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 73
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 74 ssize_t Stream::write(const void* buffer, size_t length) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 75 const char* ptr = (const char*)buffer;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 76 const char* end = ptr + length;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 77
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 78 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 79 while (ptr != end) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 80 if (_putc(*ptr++) == EOF) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 81 break;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 82 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 83 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 84 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 85
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 86 return ptr - (const char*)buffer;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 87 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 88
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 89 ssize_t Stream::read(void* buffer, size_t length) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 90 char* ptr = (char*)buffer;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 91 char* end = ptr + length;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 92
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 93 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 94 while (ptr != end) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 95 int c = _getc();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 96 if (c==EOF) break;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 97 *ptr++ = c;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 98 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 99 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 100
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 101 return ptr - (const char*)buffer;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 102 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 103
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 104 off_t Stream::seek(off_t offset, int whence) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 105 return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 106 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 107
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 108 off_t Stream::tell() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 109 return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 110 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 111
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 112 void Stream::rewind() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 113 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 114
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 115 int Stream::isatty() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 116 return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 117 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 118
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 119 int Stream::sync() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 120 return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 121 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 122
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 123 off_t Stream::size() {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 124 return 0;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 125 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 126
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 127 int Stream::printf(const char* format, ...) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 128 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 129 std::va_list arg;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 130 va_start(arg, format);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 131 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 132 int r = vfprintf(_file, format, arg);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 133 va_end(arg);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 134 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 135 return r;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 136 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 137
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 138 int Stream::scanf(const char* format, ...) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 139 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 140 std::va_list arg;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 141 va_start(arg, format);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 142 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 143 int r = vfscanf(_file, format, arg);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 144 va_end(arg);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 145 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 146 return r;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 147 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 148
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 149 int Stream::vprintf(const char* format, std::va_list args) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 150 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 151 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 152 int r = vfprintf(_file, format, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 153 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 154 return r;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 155 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 156
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 157 int Stream::vscanf(const char* format, std::va_list args) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 158 lock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 159 fflush(_file);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 160 int r = vfscanf(_file, format, args);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 161 unlock();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 162 return r;
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 163 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 164
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 165 } // namespace mbed
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 166