Diff: mbed-dev-master/platform/Stream.cpp

Revision:

0:bb348c97df44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev-master/platform/Stream.cpp	Wed Sep 16 01:11:49 2020 +0000
@@ -0,0 +1,186 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "platform/Stream.h"
+#include "platform/mbed_error.h"
+#include <errno.h>
+
+namespace mbed {
+
+Stream::Stream(const char *name) : FileLike(name), _file(NULL)
+{
+    // No lock needed in constructor
+    /* open ourselves */
+    _file = fdopen(this, "w+");
+    // fdopen() will make us buffered because Stream::isatty()
+    // wrongly returns zero which is not being changed for
+    // backward compatibility
+    if (_file) {
+        mbed_set_unbuffered_stream(_file);
+    } else {
+        MBED_ERROR1(MBED_MAKE_ERROR(MBED_MODULE_PLATFORM, MBED_ERROR_CODE_OPEN_FAILED), "Stream obj failure", _file);
+    }
+}
+
+Stream::~Stream()
+{
+    // No lock can be used in destructor
+    fclose(_file);
+}
+
+int Stream::putc(int c)
+{
+    lock();
+    fflush(_file);
+    int ret = std::fputc(c, _file);
+    unlock();
+    return ret;
+}
+int Stream::puts(const char *s)
+{
+    lock();
+    fflush(_file);
+    int ret = std::fputs(s, _file);
+    unlock();
+    return ret;
+}
+int Stream::getc()
+{
+    lock();
+    fflush(_file);
+    int ret = mbed_getc(_file);
+    unlock();
+    return ret;
+}
+char *Stream::gets(char *s, int size)
+{
+    lock();
+    fflush(_file);
+    char *ret = mbed_gets(s, size, _file);
+    unlock();
+    return ret;
+}
+
+int Stream::close()
+{
+    return 0;
+}
+
+ssize_t Stream::write(const void *buffer, size_t length)
+{
+    const char *ptr = (const char *)buffer;
+    const char *end = ptr + length;
+
+    lock();
+    while (ptr != end) {
+        if (_putc(*ptr++) == EOF) {
+            break;
+        }
+    }
+    unlock();
+
+    return ptr - (const char *)buffer;
+}
+
+ssize_t Stream::read(void *buffer, size_t length)
+{
+    char *ptr = (char *)buffer;
+    char *end = ptr + length;
+
+    lock();
+    while (ptr != end) {
+        int c = _getc();
+        if (c == EOF) {
+            break;
+        }
+        *ptr++ = c;
+    }
+    unlock();
+
+    return ptr - (const char *)buffer;
+}
+
+off_t Stream::seek(off_t offset, int whence)
+{
+    return 0;
+}
+
+off_t Stream::tell()
+{
+    return 0;
+}
+
+void Stream::rewind()
+{
+}
+
+int Stream::isatty()
+{
+    return 0;
+}
+
+int Stream::sync()
+{
+    return 0;
+}
+
+off_t Stream::size()
+{
+    return 0;
+}
+
+int Stream::printf(const char *format, ...)
+{
+    lock();
+    std::va_list arg;
+    va_start(arg, format);
+    fflush(_file);
+    int r = vfprintf(_file, format, arg);
+    va_end(arg);
+    unlock();
+    return r;
+}
+
+int Stream::scanf(const char *format, ...)
+{
+    lock();
+    std::va_list arg;
+    va_start(arg, format);
+    fflush(_file);
+    int r = vfscanf(_file, format, arg);
+    va_end(arg);
+    unlock();
+    return r;
+}
+
+int Stream::vprintf(const char *format, std::va_list args)
+{
+    lock();
+    fflush(_file);
+    int r = vfprintf(_file, format, args);
+    unlock();
+    return r;
+}
+
+int Stream::vscanf(const char *format, std::va_list args)
+{
+    lock();
+    fflush(_file);
+    int r = vfscanf(_file, format, args);
+    unlock();
+    return r;
+}
+
+} // namespace mbed