VipsDbuf

Make sure dbuf has at least size bytes available after the write point.

Destroy dbuf. This frees any allocated memory. Useful for dbufs on the stack.

Return a pointer to an area you can write to, return length of area in size. Use vips_dbuf_allocate() before this call to set a minimum amount of space to have available.

Initialize dbuf. You can also just init to zero, eg. VipsDbuf buf = {0};.

Make sure dbuf is at least size bytes.

Up to size bytes are read from the buffer and copied to data. The number of bytes transferred is returned.

Reset the buffer to empty. No memory is freed, just the data size and write point are reset.

Move the write point. whence can be SEEK_SET, SEEK_CUR, SEEK_END, with the usual meaning.

Destroy a buffer, but rather than freeing memory, a pointer is returned. This must be freed with g_free().

Return a pointer to dbuf‘s internal data.

Truncate the data so that it ends at the write point. No memory is freed.

Append size bytes from data. dbuf expands if necessary.

Write str to dbuf, but escape stuff that xml hates in text. Our argument string is utf-8.

Format the string and write to dbuf.