glibc/libio/strops.c

72   _IO_FILE *fp = &sf->_sbf._f;
92   INTUSE(_IO_setb) (fp, ptr, ptr + size, 0);
94   fp->_IO_write_base = ptr;
95   fp->_IO_read_base = ptr;
96   fp->_IO_read_ptr = ptr;
99       fp->_IO_write_ptr = pstart;
100       fp->_IO_write_end = ptr + size;
101       fp->_IO_read_end = pstart;
105       fp->_IO_write_ptr = ptr;
106       fp->_IO_write_end = ptr;
107       fp->_IO_read_end = ptr+size;
125 _IO_str_overflow (fp, c)
126      _IO_FILE *fp;
131   if (fp->_flags & _IO_NO_WRITES)
133   if ((fp->_flags & _IO_TIED_PUT_GET) && !(fp->_flags & _IO_CURRENTLY_PUTTING))
135       fp->_flags |= _IO_CURRENTLY_PUTTING;
136       fp->_IO_write_ptr = fp->_IO_read_ptr;
137       fp->_IO_read_ptr = fp->_IO_read_end;
139   pos =  fp->_IO_write_ptr - fp->_IO_write_base;
140   if (pos >= (_IO_size_t) (_IO_blen (fp) + flush_only))
142       if (fp->_flags & _IO_USER_BUF) /* not allowed to enlarge */
147 	  char *old_buf = fp->_IO_buf_base;
148 	  _IO_size_t new_size = 2 * _IO_blen (fp) + 100;
150 	    = (char *) (*((_IO_strfile *) fp)->_s._allocate_buffer) (new_size);
153 	      /*	  __ferror(fp) = 1; */
158 	      memcpy (new_buf, old_buf, _IO_blen (fp));
159 	      (*((_IO_strfile *) fp)->_s._free_buffer) (old_buf);
161 	      fp->_IO_buf_base = NULL;
164 	  if (lenp == &LEN(fp)) /* use '\0'-filling */
167 	  INTUSE(_IO_setb) (fp, new_buf, new_buf + new_size, 1);
168 	  fp->_IO_read_base = new_buf + (fp->_IO_read_base - old_buf);
169 	  fp->_IO_read_ptr = new_buf + (fp->_IO_read_ptr - old_buf);
170 	  fp->_IO_read_end = new_buf + (fp->_IO_read_end - old_buf);
171 	  fp->_IO_write_ptr = new_buf + (fp->_IO_write_ptr - old_buf);
173 	  fp->_IO_write_base = new_buf;
174 	  fp->_IO_write_end = fp->_IO_buf_end;
179     *fp->_IO_write_ptr++ = (unsigned char) c;
180   if (fp->_IO_write_ptr > fp->_IO_read_end)
181     fp->_IO_read_end = fp->_IO_write_ptr;
187 _IO_str_underflow (fp)
188      _IO_FILE *fp;
190   if (fp->_IO_write_ptr > fp->_IO_read_end)
191     fp->_IO_read_end = fp->_IO_write_ptr;
192   if ((fp->_flags & _IO_TIED_PUT_GET) && (fp->_flags & _IO_CURRENTLY_PUTTING))
194       fp->_flags &= ~_IO_CURRENTLY_PUTTING;
195       fp->_IO_read_ptr = fp->_IO_write_ptr;
196       fp->_IO_write_ptr = fp->_IO_write_end;
198   if (fp->_IO_read_ptr < fp->_IO_read_end)
199     return *((unsigned char *) fp->_IO_read_ptr);
208 _IO_str_count (fp)
209      _IO_FILE *fp;
211   return ((fp->_IO_write_ptr > fp->_IO_read_end
212 	   ? fp->_IO_write_ptr : fp->_IO_read_end)
213 	  - fp->_IO_read_base);
217 _IO_str_seekoff (fp, offset, dir, mode)
218      _IO_FILE *fp;
225   if (mode == 0 && (fp->_flags & _IO_TIED_PUT_GET))
226     mode = (fp->_flags & _IO_CURRENTLY_PUTTING ? _IOS_OUTPUT : _IOS_INPUT);
232       if (fp->_IO_file_flags & _IO_NO_WRITES)
233         new_pos = fp->_IO_read_ptr - fp->_IO_read_base;
235         new_pos = fp->_IO_write_ptr - fp->_IO_write_base;
239       _IO_ssize_t cur_size = _IO_str_count(fp);
251 	      offset += fp->_IO_read_ptr - fp->_IO_read_base;
258 	  fp->_IO_read_ptr = fp->_IO_read_base + offset;
259 	  fp->_IO_read_end = fp->_IO_read_base + cur_size;
272 	      offset += fp->_IO_write_ptr - fp->_IO_write_base;
279 	  fp->_IO_write_ptr = fp->_IO_write_base + offset;
288 _IO_str_pbackfail (fp, c)
289      _IO_FILE *fp;
292   if ((fp->_flags & _IO_NO_WRITES) && c != EOF)
294   return INTUSE(_IO_default_pbackfail) (fp, c);
299 _IO_str_finish (fp, dummy)
300      _IO_FILE *fp;
303   if (fp->_IO_buf_base && !(fp->_flags & _IO_USER_BUF))
304     (((_IO_strfile *) fp)->_s._free_buffer) (fp->_IO_buf_base);
305   fp->_IO_buf_base = NULL;
307   INTUSE(_IO_default_finish) (fp, 0);