本文整理汇总了C++中SdFile::isRoot方法的典型用法代码示例。如果您正苦于以下问题：C++ SdFile::isRoot方法的具体用法？C++ SdFile::isRoot怎么用？C++ SdFile::isRoot使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SdFile的用法示例。
在下文中一共展示了SdFile::isRoot方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: open
File SDClass::open(const char *filepath, uint8_t mode) {
/*
Open the supplied file path for reading or writing.
The file content can be accessed via the `file` property of
the `SDClass` object--this property is currently
a standard `SdFile` object from `sdfatlib`.
Defaults to read only.
If `write` is true, default action (when `append` is true) is to
append data to the end of the file.
If `append` is false then the file will be truncated first.
If the file does not exist and it is opened for writing the file
will be created.
An attempt to open a file for reading that does not exist is an
error.
*/
int pathidx;
// do the interative search
SdFile parentdir = getParentDir(filepath, &pathidx);
// no more subdirs!
filepath += pathidx;
if (! filepath[0]) {
// it was the directory itself!
return File(parentdir, "/");
}
// Open the file itself
SdFile file;
// failed to open a subdir!
if (!parentdir.isOpen())
return File();
// there is a special case for the Root directory since its a static dir
if (parentdir.isRoot()) {
if ( ! file.open(SD.root, filepath, mode)) {
// failed to open the file :(
return File();
}
// dont close the root!
} else {
if ( ! file.open(parentdir, filepath, mode)) {
return File();
}
// close the parent
parentdir.close();
}
if (mode & (O_APPEND | O_WRITE))
file.seekSet(file.fileSize());
return File(file, filepath);
}