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#include <xml_io.h>
static ID id_read, id_write;
VALUE read_check(VALUE *args) {
return rb_funcall(args[0], id_read, 1, args[1]);
}
VALUE read_failed(void) {
return Qundef;
}
int io_read_callback(void * ctx, char * buffer, int len) {
VALUE string, args[2];
size_t str_len, safe_len;
args[0] = (VALUE)ctx;
args[1] = INT2NUM(len);
string = rb_rescue(read_check, (VALUE)args, read_failed, 0);
if (NIL_P(string)) return 0;
if (string == Qundef) return -1;
if (TYPE(string) != T_STRING) return -1;
str_len = (size_t)RSTRING_LEN(string);
safe_len = str_len > (size_t)len ? (size_t)len : str_len;
memcpy(buffer, StringValuePtr(string), safe_len);
return (int)safe_len;
}
VALUE write_check(VALUE *args) {
return rb_funcall(args[0], id_write, 1, args[1]);
}
VALUE write_failed(void) {
return Qundef;
}
int io_write_callback(void * ctx, char * buffer, int len) {
VALUE args[2], size;
args[0] = (VALUE)ctx;
args[1] = rb_str_new(buffer, (long)len);
size = rb_rescue(write_check, (VALUE)args, write_failed, 0);
if (size == Qundef) return -1;
return NUM2INT(size);
}
int io_close_callback(void * ctx) {
return 0;
}
void init_nokogiri_io() {
id_read = rb_intern("read");
id_write = rb_intern("write");
}
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