Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

drivers/Stream.cpp@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #include "drivers/Stream.h"
elessair 0:f269e3021894 17
elessair 0:f269e3021894 18 namespace mbed {
elessair 0:f269e3021894 19
elessair 0:f269e3021894 20 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
elessair 0:f269e3021894 21 // No lock needed in constructor
elessair 0:f269e3021894 22 /* open ourselves */
elessair 0:f269e3021894 23 char buf[12]; /* :0x12345678 + null byte */
elessair 0:f269e3021894 24 std::sprintf(buf, ":%p", this);
elessair 0:f269e3021894 25 _file = std::fopen(buf, "w+");
elessair 0:f269e3021894 26 mbed_set_unbuffered_stream(_file);
elessair 0:f269e3021894 27 }
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 Stream::~Stream() {
elessair 0:f269e3021894 30 // No lock can be used in destructor
elessair 0:f269e3021894 31 fclose(_file);
elessair 0:f269e3021894 32 }
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 int Stream::putc(int c) {
elessair 0:f269e3021894 35 lock();
elessair 0:f269e3021894 36 fflush(_file);
elessair 0:f269e3021894 37 int ret = std::fputc(c, _file);
elessair 0:f269e3021894 38 unlock();
elessair 0:f269e3021894 39 return ret;
elessair 0:f269e3021894 40 }
elessair 0:f269e3021894 41 int Stream::puts(const char *s) {
elessair 0:f269e3021894 42 lock();
elessair 0:f269e3021894 43 fflush(_file);
elessair 0:f269e3021894 44 int ret = std::fputs(s, _file);
elessair 0:f269e3021894 45 unlock();
elessair 0:f269e3021894 46 return ret;
elessair 0:f269e3021894 47 }
elessair 0:f269e3021894 48 int Stream::getc() {
elessair 0:f269e3021894 49 lock();
elessair 0:f269e3021894 50 fflush(_file);
elessair 0:f269e3021894 51 int ret = mbed_getc(_file);
elessair 0:f269e3021894 52 unlock();
elessair 0:f269e3021894 53 return ret;
elessair 0:f269e3021894 54 }
elessair 0:f269e3021894 55 char* Stream::gets(char *s, int size) {
elessair 0:f269e3021894 56 lock();
elessair 0:f269e3021894 57 fflush(_file);
elessair 0:f269e3021894 58 char *ret = mbed_gets(s,size,_file);
elessair 0:f269e3021894 59 unlock();
elessair 0:f269e3021894 60 return ret;
elessair 0:f269e3021894 61 }
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 int Stream::close() {
elessair 0:f269e3021894 64 return 0;
elessair 0:f269e3021894 65 }
elessair 0:f269e3021894 66
elessair 0:f269e3021894 67 ssize_t Stream::write(const void* buffer, size_t length) {
elessair 0:f269e3021894 68 const char* ptr = (const char*)buffer;
elessair 0:f269e3021894 69 const char* end = ptr + length;
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 lock();
elessair 0:f269e3021894 72 while (ptr != end) {
elessair 0:f269e3021894 73 if (_putc(*ptr++) == EOF) {
elessair 0:f269e3021894 74 break;
elessair 0:f269e3021894 75 }
elessair 0:f269e3021894 76 }
elessair 0:f269e3021894 77 unlock();
elessair 0:f269e3021894 78
elessair 0:f269e3021894 79 return ptr - (const char*)buffer;
elessair 0:f269e3021894 80 }
elessair 0:f269e3021894 81
elessair 0:f269e3021894 82 ssize_t Stream::read(void* buffer, size_t length) {
elessair 0:f269e3021894 83 char* ptr = (char*)buffer;
elessair 0:f269e3021894 84 char* end = ptr + length;
elessair 0:f269e3021894 85
elessair 0:f269e3021894 86 lock();
elessair 0:f269e3021894 87 while (ptr != end) {
elessair 0:f269e3021894 88 int c = _getc();
elessair 0:f269e3021894 89 if (c==EOF) break;
elessair 0:f269e3021894 90 *ptr++ = c;
elessair 0:f269e3021894 91 }
elessair 0:f269e3021894 92 unlock();
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 return ptr - (const char*)buffer;
elessair 0:f269e3021894 95 }
elessair 0:f269e3021894 96
elessair 0:f269e3021894 97 off_t Stream::lseek(off_t offset, int whence) {
elessair 0:f269e3021894 98 return 0;
elessair 0:f269e3021894 99 }
elessair 0:f269e3021894 100
elessair 0:f269e3021894 101 int Stream::isatty() {
elessair 0:f269e3021894 102 return 0;
elessair 0:f269e3021894 103 }
elessair 0:f269e3021894 104
elessair 0:f269e3021894 105 int Stream::fsync() {
elessair 0:f269e3021894 106 return 0;
elessair 0:f269e3021894 107 }
elessair 0:f269e3021894 108
elessair 0:f269e3021894 109 off_t Stream::flen() {
elessair 0:f269e3021894 110 return 0;
elessair 0:f269e3021894 111 }
elessair 0:f269e3021894 112
elessair 0:f269e3021894 113 int Stream::printf(const char* format, ...) {
elessair 0:f269e3021894 114 lock();
elessair 0:f269e3021894 115 std::va_list arg;
elessair 0:f269e3021894 116 va_start(arg, format);
elessair 0:f269e3021894 117 fflush(_file);
elessair 0:f269e3021894 118 int r = vfprintf(_file, format, arg);
elessair 0:f269e3021894 119 va_end(arg);
elessair 0:f269e3021894 120 unlock();
elessair 0:f269e3021894 121 return r;
elessair 0:f269e3021894 122 }
elessair 0:f269e3021894 123
elessair 0:f269e3021894 124 int Stream::scanf(const char* format, ...) {
elessair 0:f269e3021894 125 lock();
elessair 0:f269e3021894 126 std::va_list arg;
elessair 0:f269e3021894 127 va_start(arg, format);
elessair 0:f269e3021894 128 fflush(_file);
elessair 0:f269e3021894 129 int r = vfscanf(_file, format, arg);
elessair 0:f269e3021894 130 va_end(arg);
elessair 0:f269e3021894 131 unlock();
elessair 0:f269e3021894 132 return r;
elessair 0:f269e3021894 133 }
elessair 0:f269e3021894 134
elessair 0:f269e3021894 135 int Stream::vprintf(const char* format, std::va_list args) {
elessair 0:f269e3021894 136 lock();
elessair 0:f269e3021894 137 fflush(_file);
elessair 0:f269e3021894 138 int r = vfprintf(_file, format, args);
elessair 0:f269e3021894 139 unlock();
elessair 0:f269e3021894 140 return r;
elessair 0:f269e3021894 141 }
elessair 0:f269e3021894 142
elessair 0:f269e3021894 143 int Stream::vscanf(const char* format, std::va_list args) {
elessair 0:f269e3021894 144 lock();
elessair 0:f269e3021894 145 fflush(_file);
elessair 0:f269e3021894 146 int r = vfscanf(_file, format, args);
elessair 0:f269e3021894 147 unlock();
elessair 0:f269e3021894 148 return r;
elessair 0:f269e3021894 149 }
elessair 0:f269e3021894 150
elessair 0:f269e3021894 151 } // namespace mbed