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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [asnprintf.c] - Blame information for rev 816

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/* Copyright (C) 2007, 2008 Eric Blake
 * Permission to use, copy, modify, and distribute this software
 * is freely granted, provided that this notice is preserved.
 */
/* This code was derived from asprintf.c */
/* doc in sprintf.c */
 
#include <_ansi.h>
#include <reent.h>
#include <stdio.h>
#include <stdarg.h>
#include <limits.h>
#include <errno.h>
#include "local.h"
 
char *
_DEFUN(_asnprintf_r, (ptr, buf, lenp, fmt),
       struct _reent *ptr _AND
       char *buf _AND
       size_t *lenp _AND
       const char *fmt _DOTS)
{
  int ret;
  va_list ap;
  FILE f;
  size_t len = *lenp;
 
  if (buf && len)
    {
      /* mark an existing buffer, but allow allocation of larger string */
      f._flags = __SWR | __SSTR | __SOPT;
    }
  else
    {
      /* mark a zero-length reallocatable buffer */
      f._flags = __SWR | __SSTR | __SMBF;
      len = 0;
      buf = NULL;
    }
  f._bf._base = f._p = (unsigned char *) buf;
  /* For now, inherit the 32-bit signed limit of FILE._bf._size.
     FIXME - it would be nice to rewrite sys/reent.h to support size_t
     for _size.  */
  if (len > INT_MAX)
    {
      ptr->_errno = EOVERFLOW;
      return NULL;
    }
  f._bf._size = f._w = len;
  f._file = -1;  /* No file. */
  va_start (ap, fmt);
  ret = _svfprintf_r (ptr, &f, fmt, ap);
  va_end (ap);
  if (ret < 0)
    return NULL;
  *lenp = ret;
  *f._p = '\0';
  return (char *) f._bf._base;
}
 
#ifndef _REENT_ONLY
 
char *
_DEFUN(asnprintf, (buf, lenp, fmt),
       char *buf _AND
       size_t *lenp _AND
       const char *fmt _DOTS)
{
  int ret;
  va_list ap;
  FILE f;
  size_t len = *lenp;
  struct _reent *ptr = _REENT;
 
  if (buf && len)
    {
      /* mark an existing buffer, but allow allocation of larger string */
      f._flags = __SWR | __SSTR | __SOPT;
    }
  else
    {
      /* mark a zero-length reallocatable buffer */
      f._flags = __SWR | __SSTR | __SMBF;
      len = 0;
      buf = NULL;
    }
  f._bf._base = f._p = (unsigned char *) buf;
  /* For now, inherit the 32-bit signed limit of FILE._bf._size.
     FIXME - it would be nice to rewrite sys/reent.h to support size_t
     for _size.  */
  if (len > INT_MAX)
    {
      ptr->_errno = EOVERFLOW;
      return NULL;
    }
  f._bf._size = f._w = len;
  f._file = -1;  /* No file. */
  va_start (ap, fmt);
  ret = _svfprintf_r (ptr, &f, fmt, ap);
  va_end (ap);
  if (ret < 0)
    return NULL;
  *lenp = ret;
  *f._p = '\0';
  return (char *) f._bf._base;
}
 
#endif /* ! _REENT_ONLY */

Line No.	Rev	Author	Line
1	207	jeremybenn	`/* Copyright (C) 2007, 2008 Eric Blake`
2			`* Permission to use, copy, modify, and distribute this software`
3			`* is freely granted, provided that this notice is preserved.`
4			`*/`
5			`/* This code was derived from asprintf.c */`
6			`/* doc in sprintf.c */`
7
8			`#include <_ansi.h>`
9			`#include <reent.h>`
10			`#include <stdio.h>`
11			`#include <stdarg.h>`
12			`#include <limits.h>`
13			`#include <errno.h>`
14			`#include "local.h"`
15
16			`char *`
17			`_DEFUN(_asnprintf_r, (ptr, buf, lenp, fmt),`
18			`struct _reent *ptr _AND`
19			`char *buf _AND`
20			`size_t *lenp _AND`
21			`const char *fmt _DOTS)`
22			`{`
23			`int ret;`
24			`va_list ap;`
25			`FILE f;`
26			`size_t len = *lenp;`
27
28			`if (buf && len)`
29			`{`
30			`/* mark an existing buffer, but allow allocation of larger string */`
31			`f._flags = __SWR \| __SSTR \| __SOPT;`
32			`}`
33			`else`
34			`{`
35			`/* mark a zero-length reallocatable buffer */`
36			`f._flags = __SWR \| __SSTR \| __SMBF;`
37			`len = 0;`
38			`buf = NULL;`
39			`}`
40			`f._bf._base = f._p = (unsigned char *) buf;`
41			`/* For now, inherit the 32-bit signed limit of FILE._bf._size.`
42			`FIXME - it would be nice to rewrite sys/reent.h to support size_t`
43			`for _size. */`
44			`if (len > INT_MAX)`
45			`{`
46			`ptr->_errno = EOVERFLOW;`
47			`return NULL;`
48			`}`
49			`f._bf._size = f._w = len;`
50			`f._file = -1; /* No file. */`
51			`va_start (ap, fmt);`
52			`ret = _svfprintf_r (ptr, &f, fmt, ap);`
53			`va_end (ap);`
54			`if (ret < 0)`
55			`return NULL;`
56			`*lenp = ret;`
57			`*f._p = '\0';`
58			`return (char *) f._bf._base;`
59			`}`
60
61			`#ifndef _REENT_ONLY`
62
63			`char *`
64			`_DEFUN(asnprintf, (buf, lenp, fmt),`
65			`char *buf _AND`
66			`size_t *lenp _AND`
67			`const char *fmt _DOTS)`
68			`{`
69			`int ret;`
70			`va_list ap;`
71			`FILE f;`
72			`size_t len = *lenp;`
73			`struct _reent *ptr = _REENT;`
74
75			`if (buf && len)`
76			`{`
77			`/* mark an existing buffer, but allow allocation of larger string */`
78			`f._flags = __SWR \| __SSTR \| __SOPT;`
79			`}`
80			`else`
81			`{`
82			`/* mark a zero-length reallocatable buffer */`
83			`f._flags = __SWR \| __SSTR \| __SMBF;`
84			`len = 0;`
85			`buf = NULL;`
86			`}`
87			`f._bf._base = f._p = (unsigned char *) buf;`
88			`/* For now, inherit the 32-bit signed limit of FILE._bf._size.`
89			`FIXME - it would be nice to rewrite sys/reent.h to support size_t`
90			`for _size. */`
91			`if (len > INT_MAX)`
92			`{`
93			`ptr->_errno = EOVERFLOW;`
94			`return NULL;`
95			`}`
96			`f._bf._size = f._w = len;`
97			`f._file = -1; /* No file. */`
98			`va_start (ap, fmt);`
99			`ret = _svfprintf_r (ptr, &f, fmt, ap);`
100			`va_end (ap);`
101			`if (ret < 0)`
102			`return NULL;`
103			`*lenp = ret;`
104			`*f._p = '\0';`
105			`return (char *) f._bf._base;`
106			`}`
107
108			`#endif /* ! _REENT_ONLY */`

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[/] [openrisc/] [trunk/] [gnu-stable/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [asnprintf.c] - Blame information for rev 816