bool
mm_io_c::write_bom(const std::string &charset) {
static const unsigned char utf8_bom[3] = {0xef, 0xbb, 0xbf};
static const unsigned char utf16le_bom[2] = {0xff, 0xfe};
static const unsigned char utf16be_bom[2] = {0xfe, 0xff};
static const unsigned char utf32le_bom[4] = {0xff, 0xfe, 0x00, 0x00};
static const unsigned char utf32be_bom[4] = {0x00, 0x00, 0xff, 0xfe};
const unsigned char *bom;
unsigned int bom_len;
if (charset.empty())
return false;
if ((charset =="UTF-8") || (charset =="UTF8")) {
bom_len = 3;
bom = utf8_bom;
} else if ((charset =="UTF-16") || (charset =="UTF-16LE") || (charset =="UTF16") || (charset =="UTF16LE")) {
bom_len = 2;
bom = utf16le_bom;
} else if ((charset =="UTF-16BE") || (charset =="UTF16BE")) {
bom_len = 2;
bom = utf16be_bom;
} else if ((charset =="UTF-32") || (charset =="UTF-32LE") || (charset =="UTF32") || (charset =="UTF32LE")) {
bom_len = 4;
bom = utf32le_bom;
} else if ((charset =="UTF-32BE") || (charset =="UTF32BE")) {
bom_len = 4;
bom = utf32be_bom;
} else
return false;
setFilePointer(0, seek_beginning);
return (write(bom, bom_len) == bom_len);
}
void
mm_io_c::save_pos(int64_t new_pos) {
m_positions.push(getFilePointer());
if (-1 != new_pos)
setFilePointer(new_pos);
}
void
mm_io_c::skip(int64 num_bytes) {
uint64_t pos = getFilePointer();
setFilePointer(pos + num_bytes);
if ((pos + num_bytes) != getFilePointer())
throw mtx::mm_io::end_of_file_x();
}
bool
mm_io_c::setFilePointer2(int64 offset, seek_mode mode) {
try {
setFilePointer(offset, mode);
return true;
} catch(...) {
return false;
}
}
bool
mm_io_c::restore_pos() {
if (m_positions.empty())
return false;
setFilePointer(m_positions.top());
m_positions.pop();
return true;
}
int64_t
mm_io_c::get_size() {
if (-1 == m_cached_size) {
save_pos();
setFilePointer(0, seek_end);
m_cached_size = getFilePointer();
restore_pos();
}
return m_cached_size;
}
mm_read_buffer_io_c::mm_read_buffer_io_c(mm_io_c *in,
size_t buffer_size,
bool delete_in)
: mm_proxy_io_c(in, delete_in)
, m_af_buffer(memory_c::alloc(buffer_size))
, m_buffer(m_af_buffer->get_buffer())
, m_cursor(0)
, m_eof(false)
, m_fill(0)
, m_offset(0)
, m_size(buffer_size)
, m_buffering(true)
, m_debug_seek(debugging_requested("read_buffer_io") || debugging_requested("read_buffer_io_read"))
, m_debug_read(debugging_requested("read_buffer_io") || debugging_requested("read_buffer_io_read"))
{
setFilePointer(0, seek_beginning);
}
bitLoader(FILE *_fp){
point = 0;
setFilePointer(_fp);
}
