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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#include <ruby.h>
#include <constants.h>
#include <bytes.h>
#include <macros.h>
ID buf_ivar_id;
ID index_ivar_id;
ID slice_method_id;
int GARBAGE_BUFFER_SIZE;
#define GET_BUF(self) rb_ivar_get(self, buf_ivar_id)
VALUE rb_thrift_memory_buffer_write(VALUE self, VALUE str);
VALUE rb_thrift_memory_buffer_read(VALUE self, VALUE length_value);
VALUE rb_thrift_memory_buffer_read_byte(VALUE self);
VALUE rb_thrift_memory_buffer_read_into_buffer(VALUE self, VALUE buffer_value, VALUE size_value);
VALUE rb_thrift_memory_buffer_write(VALUE self, VALUE str) {
VALUE buf = GET_BUF(self);
str = force_binary_encoding(str);
rb_str_buf_cat(buf, StringValuePtr(str), RSTRING_LEN(str));
return Qnil;
}
VALUE rb_thrift_memory_buffer_read(VALUE self, VALUE length_value) {
int length = FIX2INT(length_value);
VALUE index_value = rb_ivar_get(self, index_ivar_id);
int index = FIX2INT(index_value);
VALUE buf = GET_BUF(self);
VALUE data = rb_funcall(buf, slice_method_id, 2, index_value, length_value);
index += length;
if (index > RSTRING_LEN(buf)) {
index = (int)RSTRING_LEN(buf);
}
if (index >= GARBAGE_BUFFER_SIZE) {
rb_ivar_set(self, buf_ivar_id, rb_funcall(buf, slice_method_id, 2, INT2FIX(index), INT2FIX(RSTRING_LEN(buf) - 1)));
index = 0;
}
rb_ivar_set(self, index_ivar_id, INT2FIX(index));
if (RSTRING_LEN(data) < length) {
rb_raise(rb_eEOFError, "Not enough bytes remain in memory buffer");
}
return data;
}
VALUE rb_thrift_memory_buffer_read_byte(VALUE self) {
VALUE index_value = rb_ivar_get(self, index_ivar_id);
int index = FIX2INT(index_value);
VALUE buf = GET_BUF(self);
if (index >= RSTRING_LEN(buf)) {
rb_raise(rb_eEOFError, "Not enough bytes remain in memory buffer");
}
char byte = RSTRING_PTR(buf)[index++];
if (index >= GARBAGE_BUFFER_SIZE) {
rb_ivar_set(self, buf_ivar_id, rb_funcall(buf, slice_method_id, 2, INT2FIX(index), INT2FIX(RSTRING_LEN(buf) - 1)));
index = 0;
}
rb_ivar_set(self, index_ivar_id, INT2FIX(index));
int result = (int) byte;
return INT2FIX(result);
}
VALUE rb_thrift_memory_buffer_read_into_buffer(VALUE self, VALUE buffer_value, VALUE size_value) {
int i = 0;
int size = FIX2INT(size_value);
int index;
VALUE buf = GET_BUF(self);
index = FIX2INT(rb_ivar_get(self, index_ivar_id));
while (i < size) {
if (index >= RSTRING_LEN(buf)) {
rb_raise(rb_eEOFError, "Not enough bytes remain in memory buffer");
}
char byte = RSTRING_PTR(buf)[index++];
if (i >= RSTRING_LEN(buffer_value)) {
rb_raise(rb_eIndexError, "index %d out of string", i);
}
((char*)RSTRING_PTR(buffer_value))[i] = byte;
i++;
}
if (index >= GARBAGE_BUFFER_SIZE) {
rb_ivar_set(self, buf_ivar_id, rb_funcall(buf, slice_method_id, 2, INT2FIX(index), INT2FIX(RSTRING_LEN(buf) - 1)));
index = 0;
}
rb_ivar_set(self, index_ivar_id, INT2FIX(index));
return INT2FIX(i);
}
void Init_memory_buffer() {
VALUE thrift_memory_buffer_class = rb_const_get(thrift_module, rb_intern("MemoryBufferTransport"));
rb_define_method(thrift_memory_buffer_class, "write", rb_thrift_memory_buffer_write, 1);
rb_define_method(thrift_memory_buffer_class, "read", rb_thrift_memory_buffer_read, 1);
rb_define_method(thrift_memory_buffer_class, "read_byte", rb_thrift_memory_buffer_read_byte, 0);
rb_define_method(thrift_memory_buffer_class, "read_into_buffer", rb_thrift_memory_buffer_read_into_buffer, 2);
buf_ivar_id = rb_intern("@buf");
index_ivar_id = rb_intern("@index");
slice_method_id = rb_intern("slice");
GARBAGE_BUFFER_SIZE = FIX2INT(rb_const_get(thrift_memory_buffer_class, rb_intern("GARBAGE_BUFFER_SIZE")));
}
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