tmk_core/tool/mbed/mbed-sdk/libraries/mbed/common/Stream.cpp

   1 /* mbed Microcontroller Library
   2  * Copyright (c) 2006-2013 ARM Limited
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 #include "Stream.h"
  17
  18 #include <cstdarg>
  19
  20 namespace mbed {
  21
  22 Stream::Stream(const char *name) : FileLike(name), _file(NULL) {
  23     /* open ourselves */
  24     char buf[12]; /* :0x12345678 + null byte */
  25     std::sprintf(buf, ":%p", this);
  26     _file = std::fopen(buf, "w+");
  27     mbed_set_unbuffered_stream(_file);
  28 }
  29
  30 Stream::~Stream() {
  31     fclose(_file);
  32 }
  33
  34 int Stream::putc(int c) {
  35     fflush(_file);
  36     return std::fputc(c, _file);
  37 }
  38 int Stream::puts(const char *s) {
  39     fflush(_file);
  40     return std::fputs(s, _file);
  41 }
  42 int Stream::getc() {
  43     fflush(_file);
  44     return mbed_getc(_file);
  45 }
  46 char* Stream::gets(char *s, int size) {
  47     fflush(_file);
  48     return mbed_gets(s,size,_file);
  49 }
  50
  51 int Stream::close() {
  52     return 0;
  53 }
  54
  55 ssize_t Stream::write(const void* buffer, size_t length) {
  56     const char* ptr = (const char*)buffer;
  57     const char* end = ptr + length;
  58     while (ptr != end) {
  59         if (_putc(*ptr++) == EOF) {
  60             break;
  61         }
  62     }
  63     return ptr - (const char*)buffer;
  64 }
  65
  66 ssize_t Stream::read(void* buffer, size_t length) {
  67     char* ptr = (char*)buffer;
  68     char* end = ptr + length;
  69     while (ptr != end) {
  70         int c = _getc();
  71         if (c==EOF) break;
  72         *ptr++ = c;
  73     }
  74     return ptr - (const char*)buffer;
  75 }
  76
  77 off_t Stream::lseek(off_t offset, int whence) {
  78     return 0;
  79 }
  80
  81 int Stream::isatty() {
  82     return 0;
  83 }
  84
  85 int Stream::fsync() {
  86     return 0;
  87 }
  88
  89 off_t Stream::flen() {
  90     return 0;
  91 }
  92
  93 int Stream::printf(const char* format, ...) {
  94     std::va_list arg;
  95     va_start(arg, format);
  96     fflush(_file);
  97     int r = vfprintf(_file, format, arg);
  98     va_end(arg);
  99     return r;
 100 }
 101
 102 int Stream::scanf(const char* format, ...) {
 103     std::va_list arg;
 104     va_start(arg, format);
 105     fflush(_file);
 106     int r = vfscanf(_file, format, arg);
 107     va_end(arg);
 108     return r;
 109 }
 110
 111 } // namespace mbed