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/* Please see the LICENSE file for copyright and distribution information */
#include "extconf.h"
#include "ruby_libxml.h"
static ID READ_METHOD;
#ifndef HAVE_RB_IO_BUFWRITE
static ID WRITE_METHOD;
#endif /* !HAVE_RB_IO_BUFWRITE */
/* This method is called by libxml when it wants to read
more data from a stream. We go with the duck typing
solution to support StringIO objects. */
int rxml_read_callback(void *context, char *buffer, int len)
{
VALUE io = (VALUE) context;
VALUE string = rb_funcall(io, READ_METHOD, 1, INT2NUM(len));
int size;
if (string == Qnil)
return 0;
size = RSTRING_LEN(string);
memcpy(buffer, StringValuePtr(string), size);
return size;
}
int rxml_write_callback(void *context, const char *buffer, int len)
{
#ifndef HAVE_RB_IO_BUFWRITE
VALUE io, written, string;
io = (VALUE) context;
string = rb_str_new(buffer, len);
written = rb_funcall(io, WRITE_METHOD, 1, string);
return NUM2INT(written);
#else
return rb_io_bufwrite((VALUE) context, buffer, (size_t) len);
#endif /* !HAVE_RB_IO_BUFWRITE */
}
void rxml_init_io(void)
{
READ_METHOD = rb_intern("read");
#ifndef HAVE_RB_IO_BUFWRITE
WRITE_METHOD = rb_intern("write");
#endif /* !HAVE_RB_IO_BUFWRITE */
}
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