gInputStreamRead {RGtk2} | R Documentation

## gInputStreamRead

### Description

Tries to read `count` bytes from the stream into the buffer starting at `buffer`. Will block during this read.

### Usage

    gInputStreamRead(object, count, cancellable = NULL, .errwarn = TRUE)

### Arguments

``object`` | a `GInputStream`.
``count`` | the number of bytes that will be read from the stream
``cancellable`` | optional `GCancellable` object, `NULL` to ignore.
`.errwarn` | Whether to issue a warning on error or fail silently

### Details

If count is zero returns zero and does nothing. A value of `count` larger than `G_MAXSSIZE` will cause a `G_IO_ERROR_INVALID_ARGUMENT` error.

On success, the number of bytes read into the buffer is returned. It is not an error if this is not the same as the requested size, as it can happen e.g. near the end of a file. Zero is returned on end of file (or if `count` is zero), but never otherwise.

If `cancellable` is not NULL, then the operation can be cancelled by triggering the cancellable object from another thread. If the operation was cancelled, the error G_IO_ERROR_CANCELLED will be returned. If an operation was partially finished when the operation was cancelled the partial result will be returned, without an error.

On error -1 is returned and `error` is set accordingly.

### Value

A list containing the following elements:

`retval` | [integer] Number of bytes read, or -1 on error
``buffer`` | a buffer to read data into (which should be at least count bytes long).
``error`` | location to store the error occuring, or `NULL` to ignore

### Author(s)

Derived by RGtkGen from GTK+ documentation

[Package RGtk2 version 2.20.40 Index]