|
Quick Links: |
#include <bdlbb_blobstreambuf.h>
Public Member Functions | |
| InBlobStreamBuf (const bdlbb::Blob *blob) | |
| ~InBlobStreamBuf () | |
| void | reset (const bdlbb::Blob *blob=0) |
| int | currentBufferIndex () const |
| const bdlbb::Blob * | data () const |
| int | previousBuffersLength () const |
Protected Member Functions | |
| virtual int_type | overflow (int_type c=bsl::streambuf::traits_type::eof()) |
| virtual int_type | pbackfail (int_type c=bsl::streambuf::traits_type::eof()) |
| virtual pos_type | seekoff (off_type offset, bsl::ios_base::seekdir fixedPosition, bsl::ios_base::openmode which=bsl::ios_base::in|bsl::ios_base::out) |
| virtual pos_type | seekpos (pos_type position, bsl::ios_base::openmode which=bsl::ios_base::in|bsl::ios_base::out) |
| virtual bsl::streamsize | showmanyc () |
| virtual int | sync () |
| virtual int_type | underflow () |
| virtual bsl::streamsize | xsgetn (char_type *destination, bsl::streamsize numChars) |
| virtual bsl::streamsize | xsputn (const char_type *source, bsl::streamsize numChars) |
This class implements the input functionality of the basic_streambuf protocol, using a client-supplied bdlbb::Blob.
See Component bdlbb_blobstreambuf
| bdlbb::InBlobStreamBuf::InBlobStreamBuf | ( | const bdlbb::Blob * | blob | ) | [explicit] |
Create a BlobStreamBuf using the specified blob. The behavior is undefined unless blob remains valid and externally unmodified for the lifetime of this streambuf.
| bdlbb::InBlobStreamBuf::~InBlobStreamBuf | ( | ) |
Destroy this stream buffer.
| virtual int_type bdlbb::InBlobStreamBuf::overflow | ( | int_type | c = bsl::streambuf::traits_type::eof() |
) | [protected, virtual] |
Return traits_type::eof() unconditionally.
| virtual int_type bdlbb::InBlobStreamBuf::pbackfail | ( | int_type | c = bsl::streambuf::traits_type::eof() |
) | [protected, virtual] |
Adjust the underlying blob and put the optionally specified character c at the newly valid gptr(). Return c (or ~traits_typeeof if c == traits_type::eof) on success, and traits_type::eof() otherwise.
| virtual pos_type bdlbb::InBlobStreamBuf::seekoff | ( | off_type | offset, | |
| bsl::ios_base::seekdir | fixedPosition, | |||
| bsl::ios_base::openmode | which = bsl::ios_base::in|bsl::ios_base::out | |||
| ) | [protected, virtual] |
Set the location from which the next I/O operation indicated by the optionally specified which mode will occur to the specified offset position from the location indicated by the specified fixedPosition. Return the new offset on success, and off_type(-1) otherwise. offset may be negative. Note that this method will fail if bsl::ios_base::out is set.
| virtual pos_type bdlbb::InBlobStreamBuf::seekpos | ( | pos_type | position, | |
| bsl::ios_base::openmode | which = bsl::ios_base::in|bsl::ios_base::out | |||
| ) | [protected, virtual] |
Set the location from which the next I/O operation indicated by the optionally specified which mode will occur to the specified position. Return position on success, and off_type(-1) otherwise. Note that this method will fail if bsl::ios_base::out is set.
| virtual bsl::streamsize bdlbb::InBlobStreamBuf::showmanyc | ( | ) | [protected, virtual] |
Return the number of characters currently available for reading from this stream buffer, or 0 if there are none.
| virtual int bdlbb::InBlobStreamBuf::sync | ( | ) | [protected, virtual] |
Return 0 unconditionally.
| virtual int_type bdlbb::InBlobStreamBuf::underflow | ( | ) | [protected, virtual] |
Adjust the underlying blob so that the next read position is valid. Return the character at gptr() on success and traits_type::eof() otherwise.
| virtual bsl::streamsize bdlbb::InBlobStreamBuf::xsgetn | ( | char_type * | destination, | |
| bsl::streamsize | numChars | |||
| ) | [protected, virtual] |
Read the specified numChars to the specified destination. Return the number of characters successfully read. The behavior is undefined unless 0 <= numChars.
| virtual bsl::streamsize bdlbb::InBlobStreamBuf::xsputn | ( | const char_type * | source, | |
| bsl::streamsize | numChars | |||
| ) | [protected, virtual] |
Return 0 unconditionally.
| void bdlbb::InBlobStreamBuf::reset | ( | const bdlbb::Blob * | blob = 0 |
) |
Reset the get areas. Optionally set the underlying bdlbb::Blob value to the optionally specified blob if blob is not 0. The behavior is undefined unless blob remains valid and externally unmodified for the lifetime of this streambuf.
| int bdlbb::InBlobStreamBuf::currentBufferIndex | ( | ) | const |
Return the index of the current buffer. The behavior is undefined unless the "streamed" blob has at least one buffer.
| const bdlbb::Blob* bdlbb::InBlobStreamBuf::data | ( | ) | const |
Return the address of the blob held by this stream buffer.
| int bdlbb::InBlobStreamBuf::previousBuffersLength | ( | ) | const |
Return the number of bytes contained in the buffers located before the current one. The behavior is undefined unless the "streamed" blob has at least one buffer.
1.7.1