#include "strfile.h"
#include "libioP.h"
#include <string.h>
#if 0
#define ALLOCATED(FP) ((FP)->_f._IO_buf_base && DYNAMIC(FP))
#define CONSTANT(FP) ((FP)->_f._IO_file_flags & _IO_NO_WRITES)
#define ALSIZE(FP) ???
#define PALLOC(FP) \
((FP)->_s._allocate_buffer == default_alloc ? 0 : (FP)->_s._allocate_buffer)
#define PFREE(FP) \
((FP)->_s._free_buffer == default_free ? 0 : (FP)->_s._free_buffer)
#endif
#ifdef TODO
#endif
void
_IO_str_init_static (fp, ptr, size, pstart)
_IO_FILE *fp;
char *ptr;
int size;
char *pstart;
{
if (size == 0)
size = strlen (ptr);
else if (size < 0)
{
int s;
size = 512;
for (; s = 2*size, s > 0 && ptr + s > ptr && s < 0x4000000L; )
size = s;
for (s = size >> 1; s > 0; s >>= 1)
{
if (ptr + size + s > ptr)
size += s;
}
}
_IO_setb (fp, ptr, ptr + size, 0);
fp->_IO_write_base = ptr;
fp->_IO_read_base = ptr;
fp->_IO_read_ptr = ptr;
if (pstart)
{
fp->_IO_write_ptr = pstart;
fp->_IO_write_end = ptr + size;
fp->_IO_read_end = pstart;
}
else
{
fp->_IO_write_ptr = ptr;
fp->_IO_write_end = ptr;
fp->_IO_read_end = ptr+size;
}
(((_IO_strfile *) fp)->_s._allocate_buffer) = (_IO_alloc_type)0;
}
void
_IO_str_init_readonly (fp, ptr, size)
_IO_FILE *fp;
const char *ptr;
int size;
{
_IO_str_init_static (fp, (char *) ptr, size, NULL);
fp->_IO_file_flags |= _IO_NO_WRITES;
}
int
_IO_str_overflow (fp, c)
_IO_FILE *fp;
int c;
{
int flush_only = c == EOF;
_IO_size_t pos;
if (fp->_flags & _IO_NO_WRITES)
return flush_only ? 0 : EOF;
if ((fp->_flags & _IO_TIED_PUT_GET) && !(fp->_flags & _IO_CURRENTLY_PUTTING))
{
fp->_flags |= _IO_CURRENTLY_PUTTING;
fp->_IO_write_ptr = fp->_IO_read_ptr;
fp->_IO_read_ptr = fp->_IO_read_end;
}
pos = fp->_IO_write_ptr - fp->_IO_write_base;
if (pos >= (_IO_size_t) (_IO_blen (fp) + flush_only))
{
if (fp->_flags & _IO_USER_BUF)
return EOF;
else
{
char *new_buf;
char *old_buf = fp->_IO_buf_base;
_IO_size_t new_size = 2 * _IO_blen (fp) + 100;
new_buf
= (char *) (*((_IO_strfile *) fp)->_s._allocate_buffer) (new_size);
if (new_buf == NULL)
{
return EOF;
}
if (fp->_IO_buf_base)
{
memcpy (new_buf, old_buf, _IO_blen (fp));
(*((_IO_strfile *) fp)->_s._free_buffer) (fp->_IO_buf_base);
fp->_IO_buf_base = NULL;
}
#if 0
if (lenp == &LEN(fp))
memset (new_buf + pos, 0, blen() - pos);
#endif
_IO_setb (fp, new_buf, new_buf + new_size, 1);
fp->_IO_read_base = new_buf + (fp->_IO_read_base - old_buf);
fp->_IO_read_ptr = new_buf + (fp->_IO_read_ptr - old_buf);
fp->_IO_read_end = new_buf + (fp->_IO_read_end - old_buf);
fp->_IO_write_ptr = new_buf + (fp->_IO_write_ptr - old_buf);
fp->_IO_write_base = new_buf;
fp->_IO_write_end = fp->_IO_buf_end;
}
}
if (!flush_only)
*fp->_IO_write_ptr++ = (unsigned char) c;
if (fp->_IO_write_ptr > fp->_IO_read_end)
fp->_IO_read_end = fp->_IO_write_ptr;
return c;
}
int
_IO_str_underflow (fp)
_IO_FILE *fp;
{
if (fp->_IO_write_ptr > fp->_IO_read_end)
fp->_IO_read_end = fp->_IO_write_ptr;
if ((fp->_flags & _IO_TIED_PUT_GET) && (fp->_flags & _IO_CURRENTLY_PUTTING))
{
fp->_flags &= ~_IO_CURRENTLY_PUTTING;
fp->_IO_read_ptr = fp->_IO_write_ptr;
fp->_IO_write_ptr = fp->_IO_write_end;
}
if (fp->_IO_read_ptr < fp->_IO_read_end)
return *((unsigned char *) fp->_IO_read_ptr);
else
return EOF;
}
_IO_ssize_t
_IO_str_count (fp)
_IO_FILE *fp;
{
return ((fp->_IO_write_ptr > fp->_IO_read_end
? fp->_IO_write_ptr : fp->_IO_read_end)
- fp->_IO_read_base);
}
_IO_pos_t
_IO_str_seekoff (fp, offset, dir, mode)
_IO_FILE *fp;
_IO_off_t offset;
int dir;
int mode;
{
_IO_ssize_t cur_size = _IO_str_count (fp);
_IO_pos_t new_pos = EOF;
if (mode & _IOS_INPUT)
{
switch (dir)
{
case _IO_seek_end:
offset += cur_size;
break;
case _IO_seek_cur:
offset += fp->_IO_read_ptr - fp->_IO_read_base;
break;
default:
break;
}
if (offset < 0 || (_IO_ssize_t) offset > cur_size)
return EOF;
fp->_IO_read_ptr = fp->_IO_read_base + offset;
fp->_IO_read_end = fp->_IO_read_base + cur_size;
new_pos = offset;
}
if (mode & _IOS_OUTPUT)
{
switch (dir)
{
case _IO_seek_end:
offset += cur_size;
break;
case _IO_seek_cur:
offset += fp->_IO_write_ptr - fp->_IO_write_base;
break;
default:
break;
}
if (offset < 0 || (_IO_ssize_t) offset > cur_size)
return EOF;
fp->_IO_write_ptr = fp->_IO_write_base + offset;
new_pos = offset;
}
return new_pos;
}
int
_IO_str_pbackfail (fp, c)
_IO_FILE *fp;
int c;
{
if ((fp->_flags & _IO_NO_WRITES) && c != EOF)
return EOF;
return _IO_default_pbackfail (fp, c);
}
void
_IO_str_finish (fp, dummy)
_IO_FILE *fp;
int dummy;
{
if (fp->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
(((_IO_strfile *) fp)->_s._free_buffer) (fp->_IO_buf_base);
fp->_IO_buf_base = NULL;
_IO_default_finish (fp, 0);
}
struct _IO_jump_t _IO_str_jumps =
{
JUMP_INIT_DUMMY,
JUMP_INIT(finish, _IO_str_finish),
JUMP_INIT(overflow, _IO_str_overflow),
JUMP_INIT(underflow, _IO_str_underflow),
JUMP_INIT(uflow, _IO_default_uflow),
JUMP_INIT(pbackfail, _IO_str_pbackfail),
JUMP_INIT(xsputn, _IO_default_xsputn),
JUMP_INIT(xsgetn, _IO_default_xsgetn),
JUMP_INIT(seekoff, _IO_str_seekoff),
JUMP_INIT(seekpos, _IO_default_seekpos),
JUMP_INIT(setbuf, _IO_default_setbuf),
JUMP_INIT(sync, _IO_default_sync),
JUMP_INIT(doallocate, _IO_default_doallocate),
JUMP_INIT(read, _IO_default_read),
JUMP_INIT(write, _IO_default_write),
JUMP_INIT(seek, _IO_default_seek),
JUMP_INIT(close, _IO_default_close),
JUMP_INIT(stat, _IO_default_stat)
};