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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdio/] [refill.c] - Blame information for rev 171

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/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */
/* No user fns here.  Pesch 15apr92. */
 
#include <_ansi.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "local.h"
 
static int
_DEFUN(lflush, (fp),
       FILE *fp)
{
  if ((fp->_flags & (__SLBF | __SWR)) == (__SLBF | __SWR))
    return fflush (fp);
  return 0;
}
 
/*
 * Refill a stdio buffer.
 * Return EOF on eof or error, 0 otherwise.
 */
 
int
_DEFUN(__srefill_r, (ptr, fp),
       struct _reent * ptr _AND
       register FILE * fp)
{
  /* make sure stdio is set up */
 
  CHECK_INIT (ptr, fp);
 
  ORIENT (fp, -1);
 
  fp->_r = 0;                    /* largely a convenience for callers */
 
#ifndef __CYGWIN__
  /* SysV does not make this test; take it out for compatibility */
  if (fp->_flags & __SEOF)
    return EOF;
#endif
 
  /* if not already reading, have to be reading and writing */
  if ((fp->_flags & __SRD) == 0)
    {
      if ((fp->_flags & __SRW) == 0)
        {
          ptr->_errno = EBADF;
          fp->_flags |= __SERR;
          return EOF;
        }
      /* switch to reading */
      if (fp->_flags & __SWR)
        {
          if (_fflush_r (ptr, fp))
            return EOF;
          fp->_flags &= ~__SWR;
          fp->_w = 0;
          fp->_lbfsize = 0;
        }
      fp->_flags |= __SRD;
    }
  else
    {
      /*
       * We were reading.  If there is an ungetc buffer,
       * we must have been reading from that.  Drop it,
       * restoring the previous buffer (if any).  If there
       * is anything in that buffer, return.
       */
      if (HASUB (fp))
        {
          FREEUB (ptr, fp);
          if ((fp->_r = fp->_ur) != 0)
            {
              fp->_p = fp->_up;
              return 0;
            }
        }
    }
 
  if (fp->_bf._base == NULL)
    __smakebuf_r (ptr, fp);
 
  /*
   * Before reading from a line buffered or unbuffered file,
   * flush all line buffered output files, per the ANSI C
   * standard.
   */
 
  if (fp->_flags & (__SLBF | __SNBF))
    _CAST_VOID _fwalk (_GLOBAL_REENT, lflush);
  fp->_p = fp->_bf._base;
  fp->_r = fp->_read (ptr, fp->_cookie, (char *) fp->_p, fp->_bf._size);
#ifndef __CYGWIN__
  if (fp->_r <= 0)
#else
  if (fp->_r > 0)
    fp->_flags &= ~__SEOF;
  else
#endif
    {
      if (fp->_r == 0)
        fp->_flags |= __SEOF;
      else
        {
          fp->_r = 0;
          fp->_flags |= __SERR;
        }
      return EOF;
    }
  return 0;
}

Line No.	Rev	Author	Line
1	148	jeremybenn	`/*`
2			`* Copyright (c) 1990 The Regents of the University of California.`
3			`* All rights reserved.`
4			`*`
5			`* Redistribution and use in source and binary forms are permitted`
6			`* provided that the above copyright notice and this paragraph are`
7			`* duplicated in all such forms and that any documentation,`
8			`* advertising materials, and other materials related to such`
9			`* distribution and use acknowledge that the software was developed`
10			`* by the University of California, Berkeley. The name of the`
11			`* University may not be used to endorse or promote products derived`
12			`* from this software without specific prior written permission.`
13			* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14			`* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED`
15			`* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.`
16			`*/`
17			`/* No user fns here. Pesch 15apr92. */`
18
19			`#include <_ansi.h>`
20			`#include <stdio.h>`
21			`#include <stdlib.h>`
22			`#include <errno.h>`
23			`#include "local.h"`
24
25			`static int`
26			`_DEFUN(lflush, (fp),`
27			`FILE *fp)`
28			`{`
29			`if ((fp->_flags & (__SLBF \| __SWR)) == (__SLBF \| __SWR))`
30			`return fflush (fp);`
31			`return 0;`
32			`}`
33
34			`/*`
35			`* Refill a stdio buffer.`
36			`* Return EOF on eof or error, 0 otherwise.`
37			`*/`
38
39			`int`
40			`_DEFUN(__srefill_r, (ptr, fp),`
41			`struct _reent * ptr _AND`
42			`register FILE * fp)`
43			`{`
44			`/* make sure stdio is set up */`
45
46			`CHECK_INIT (ptr, fp);`
47
48			`ORIENT (fp, -1);`
49
50			`fp->_r = 0; /* largely a convenience for callers */`
51
52			`#ifndef __CYGWIN__`
53			`/* SysV does not make this test; take it out for compatibility */`
54			`if (fp->_flags & __SEOF)`
55			`return EOF;`
56			`#endif`
57
58			`/* if not already reading, have to be reading and writing */`
59			`if ((fp->_flags & __SRD) == 0)`
60			`{`
61			`if ((fp->_flags & __SRW) == 0)`
62			`{`
63			`ptr->_errno = EBADF;`
64			`fp->_flags \|= __SERR;`
65			`return EOF;`
66			`}`
67			`/* switch to reading */`
68			`if (fp->_flags & __SWR)`
69			`{`
70			`if (_fflush_r (ptr, fp))`
71			`return EOF;`
72			`fp->_flags &= ~__SWR;`
73			`fp->_w = 0;`
74			`fp->_lbfsize = 0;`
75			`}`
76			`fp->_flags \|= __SRD;`
77			`}`
78			`else`
79			`{`
80			`/*`
81			`* We were reading. If there is an ungetc buffer,`
82			`* we must have been reading from that. Drop it,`
83			`* restoring the previous buffer (if any). If there`
84			`* is anything in that buffer, return.`
85			`*/`
86			`if (HASUB (fp))`
87			`{`
88			`FREEUB (ptr, fp);`
89			`if ((fp->_r = fp->_ur) != 0)`
90			`{`
91			`fp->_p = fp->_up;`
92			`return 0;`
93			`}`
94			`}`
95			`}`
96
97			`if (fp->_bf._base == NULL)`
98			`__smakebuf_r (ptr, fp);`
99
100			`/*`
101			`* Before reading from a line buffered or unbuffered file,`
102			`* flush all line buffered output files, per the ANSI C`
103			`* standard.`
104			`*/`
105
106			`if (fp->_flags & (__SLBF \| __SNBF))`
107			`_CAST_VOID _fwalk (_GLOBAL_REENT, lflush);`
108			`fp->_p = fp->_bf._base;`
109			`fp->_r = fp->_read (ptr, fp->_cookie, (char *) fp->_p, fp->_bf._size);`
110			`#ifndef __CYGWIN__`
111			`if (fp->_r <= 0)`
112			`#else`
113			`if (fp->_r > 0)`
114			`fp->_flags &= ~__SEOF;`
115			`else`
116			`#endif`
117			`{`
118			`if (fp->_r == 0)`
119			`fp->_flags \|= __SEOF;`
120			`else`
121			`{`
122			`fp->_r = 0;`
123			`fp->_flags \|= __SERR;`
124			`}`
125			`return EOF;`
126			`}`
127			`return 0;`
128			`}`

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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdio/] [refill.c] - Blame information for rev 171