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newlib: vf[w]scanf: Implement POSIX %m modifier 

* The new code is guarded with _WANT_IO_POSIX_EXTENSIONS, but
  this is automatically enabled with _WANT_IO_C99_FORMATS for now.

* vfscanf neglects to implement %l[, so %ml[ is not implemented yet
  either.

* Sidenote: vfwscanf doesn't allow ranges in %[ yet.  Strictly this
  is allowed per POSIX, but it differes from vfscanf as well as from
  glibc.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2017-11-30 21:50:23 +01:00
parent 27c1a7972c
commit d43863f569
2 changed files with 448 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

221
newlib/libc/stdio/vfscanf.c
View File

@ -212,6 +212,7 @@ static void * get_arg (int, va_list *, int *, void **);
#define SUPPRESS 0x10 /* suppress assignment */
#define POINTER 0x20 /* weird %p pointer (`fake hex') */
#define NOSKIP 0x40 /* do not skip blanks */
#define MALLOC 0x80 /* handle 'm' modifier */
/*
* The following are used in numeric conversions only:
@ -453,6 +454,122 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
#ifdef _MB_CAPABLE
mbstate_t state; /* value to keep track of multibyte state */
#endif
#ifdef _WANT_IO_C99_FORMATS
#define _WANT_IO_POSIX_EXTENSIONS
#endif
#ifdef _WANT_IO_POSIX_EXTENSIONS
/* POSIX requires that fscanf frees all allocated strings from 'm'
conversions in case it returns EOF. m_ptr is used to keep track.
It will be allocated on the stack the first time an 'm' conversion
takes place, and it will be free'd on return from the function.
This implementation tries to save space by only allocating 8
pointer slots at a time. Most scenarios should never have to call
realloc again. This implementation allows only up to 65528 'm'
conversions per fscanf invocation for now. That should be enough
for almost all scenarios, right? */
struct m_ptrs {
void ***m_arr; /* Array of pointer args to 'm' conversion */
uint16_t m_siz; /* Number of slots in m_arr */
uint16_t m_cnt; /* Number of valid entries in m_arr */
} *m_ptr = NULL;
#define init_m_ptr() \
do \
{ \
if (!m_ptr) \
{ \
m_ptr = (struct m_ptrs *) alloca (sizeof *m_ptr); \
m_ptr->m_arr = NULL; \
m_ptr->m_siz = 0; \
m_ptr->m_cnt = 0; \
} \
} \
while (0)
#define push_m_ptr(arg) \
do \
{ \
if (m_ptr->m_cnt >= m_ptr->m_siz) \
{ \
void ***n = NULL; \
\
if (m_ptr->m_siz + 8 > 0 && m_ptr->m_siz + 8 < UINT16_MAX) \
n = (void ***) realloc (m_ptr->m_arr, \
(m_ptr->m_siz + 8) * \
sizeof (void **)); \
if (!n) \
{ \
nassigned = EOF; \
goto match_failure; \
} \
m_ptr->m_arr = n; \
m_ptr->m_siz += 8; \
} \
m_ptr->m_arr[m_ptr->m_cnt++] = (void **) (arg); \
} \
while (0)
#define alloc_m_ptr(_type, _p, _p0, _p_p, _w) \
({ \
_p_p = GET_ARG (N, ap, _type **); \
if (!_p_p) \
goto match_failure; \
_p0 = (_type *) malloc ((_w) * sizeof (_type)); \
if (!_p0) \
{ \
nassigned = EOF; \
goto match_failure; \
} \
*_p_p = _p0; \
push_m_ptr (_p_p); \
_p = _p0; \
_w; \
})
#define realloc_m_ptr(_type, _p, _p0, _p_p, _w) \
({ \
size_t _nw = (_w); \
if (_p_p && _p - _p0 == _nw) \
{ \
_p0 = (_type *) realloc (_p0, (_nw << 1) * sizeof (_type)); \
if (!_p0) \
{ \
nassigned = EOF; \
goto match_failure; \
} \
_p = _p0 + _nw; \
*_p_p = _p0; \
_nw <<= 1; \
} \
_nw; \
})
#define shrink_m_ptr(_type, _p_p, _w, _cw) \
({ \
size_t _nw = (_w); \
if (_p_p && _nw < _cw) \
{ \
_type *_np_p = (_type *) \
realloc (*_p_p, _nw * sizeof (_type)); \
if (_np_p) \
*_p_p = _np_p; \
} \
})
#define free_m_ptr() \
do \
{ \
if (m_ptr) \
{ \
if (nassigned == EOF) \
{ \
int i; \
for (i = 0; i < m_ptr->m_cnt; ++i) \
{ \
free (*m_ptr->m_arr[i]); \
*m_ptr->m_arr[i] = NULL; \
} \
} \
if (m_ptr->m_arr) \
free (m_ptr->m_arr); \
} \
} \
while (0)
#endif
#define CCFN_PARAMS _PARAMS((struct _reent *, const char *, char **, int))
u_long (*ccfn)CCFN_PARAMS=0; /* conversion function (strtol/strtoul) */
@ -564,7 +681,7 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
continue;
case '*':
if ((flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS))
if ((flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS | MALLOC))
|| width)
goto match_failure;
flags |= SUPPRESS;
@ -645,6 +762,14 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
flags |= LONGDBL;
goto again;
#endif /* _WANT_IO_C99_FORMATS */
#ifdef _WANT_IO_POSIX_EXTENSIONS
case 'm':
if (flags & (CHAR | SHORT | LONG | LONGDBL | MALLOC))
goto match_failure;
init_m_ptr ();
flags |= MALLOC;
goto again;
#endif
case '0':
case '1':
@ -656,14 +781,14 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
case '7':
case '8':
case '9':
if (flags & (CHAR | SHORT | LONG | LONGDBL))
if (flags & (CHAR | SHORT | LONG | LONGDBL | MALLOC))
goto match_failure;
width = width * 10 + c - '0';
goto again;
#ifndef _NO_POS_ARGS
case '$':
if (flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS))
if (flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS | MALLOC))
goto match_failure;
if (width <= MAX_POS_ARGS)
{
@ -851,12 +976,21 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
if (flags & LONG)
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
wchar_t **wcp_p = NULL;
wchar_t *wcp0 = NULL;
size_t width0 = 0;
#endif
mbstate_t state;
memset (&state, 0, sizeof (mbstate_t));
if ((flags & SUPPRESS) == 0)
wcp = GET_ARG (N, ap, wchar_t *);
else
if (flags & SUPPRESS)
wcp = NULL;
#ifdef _WANT_IO_POSIX_EXTENSIONS
else if (flags & MALLOC)
width0 = alloc_m_ptr (wchar_t, wcp, wcp0, wcp_p, width);
#endif
else
wcp = GET_ARG (N, ap, wchar_t *);
n = 0;
while (width != 0)
{
@ -885,6 +1019,9 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
break;
}
}
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (wchar_t, wcp_p, width0 - width, width0);
#endif
if (!(flags & SUPPRESS))
nassigned++;
}
@ -919,10 +1056,20 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
}
else
{
size_t r = _fread_r (rptr, (_PTR) GET_ARG (N, ap, char *), 1, width, fp);
size_t r;
#ifdef _WANT_IO_POSIX_EXTENSIONS
char **p_p = NULL;
if (flags & MALLOC)
alloc_m_ptr (char, p, p0, p_p, width);
else
#endif
p = GET_ARG (N, ap, char *);
r = _fread_r (rptr, p, 1, width, fp);
if (r == 0)
goto input_failure;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (char, p_p, r, width);
#endif
nread += r;
nassigned++;
}
@ -953,11 +1100,22 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
}
else
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
char **p_p = NULL;
size_t p_siz = 0;
if (flags & MALLOC)
p_siz = alloc_m_ptr (char, p, p0, p_p, 32);
else
#endif
p0 = p = GET_ARG (N, ap, char *);
while (ccltab[*fp->_p])
{
fp->_r--;
*p++ = *fp->_p++;
#ifdef _WANT_IO_POSIX_EXTENSIONS
p_siz = realloc_m_ptr (char, p, p0, p_p, p_siz);
#endif
if (--width == 0)
break;
if (BufferEmpty)
@ -971,6 +1129,9 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
if (n == 0)
goto match_failure;
*p = 0;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (char, p_p, n + 1, p_siz);
#endif
nassigned++;
}
nread += n;
@ -983,13 +1144,22 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2
if (flags & LONG)
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
wchar_t **wcp_p = NULL;
wchar_t *wcp0 = NULL;
size_t wcp_siz = 0;
#endif
/* Process %S and %ls placeholders */
mbstate_t state;
memset (&state, 0, sizeof (mbstate_t));
if ((flags & SUPPRESS) == 0)
wcp = GET_ARG (N, ap, wchar_t *);
else
if (flags & SUPPRESS)
wcp = &wc;
#ifdef _WANT_IO_POSIX_EXTENSIONS
else if (flags & MALLOC)
wcp_siz = alloc_m_ptr (wchar_t, wcp, wcp0, wcp_p, 32);
#endif
else
wcp = GET_ARG (N, ap, wchar_t *);
n = 0;
while (!isspace (*fp->_p) && width != 0)
{
@ -1014,7 +1184,13 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
nread += n;
width -= 1;
if ((flags & SUPPRESS) == 0)
{
wcp += 1;
#ifdef _WANT_IO_POSIX_EXTENSIONS
wcp_siz = realloc_m_ptr (wchar_t, wcp, wcp0, wcp_p,
wcp_siz);
#endif
}
n = 0;
}
if (BufferEmpty)
@ -1027,6 +1203,9 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
if (!(flags & SUPPRESS))
{
*wcp = L'\0';
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (wchar_t, wcp_p, wcp - wcp0 + 1, wcp_siz);
#endif
nassigned++;
}
}
@ -1047,17 +1226,32 @@ _DEFUN(__SVFSCANF_R, (rptr, fp, fmt0, ap),
}
else
{
p0 = p = GET_ARG (N, ap, char *);
#ifdef _WANT_IO_POSIX_EXTENSIONS
char **p_p = NULL;
size_t p_siz = 0;
if (flags & MALLOC)
p_siz = alloc_m_ptr (char, p, p0, p_p, 32);
else
#endif
p0 = GET_ARG (N, ap, char *);
p = p0;
while (!isspace (*fp->_p))
{
fp->_r--;
*p++ = *fp->_p++;
#ifdef _WANT_IO_POSIX_EXTENSIONS
p_siz = realloc_m_ptr (char, p, p0, p_p, p_siz);
#endif
if (--width == 0)
break;
if (BufferEmpty)
break;
}
*p = 0;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (char, p_p, p - p0 + 1, p_siz);
#endif
nread += p - p0;
nassigned++;
}
@ -1647,6 +1841,9 @@ match_failure:
all_done:
/* Return number of matches, which can be 0 on match failure. */
_newlib_flockfile_end (fp);
#ifdef _WANT_IO_POSIX_EXTENSIONS
free_m_ptr ();
#endif
return nassigned;
}

241
newlib/libc/stdio/vfwscanf.c
View File

@ -219,6 +219,7 @@ static void * get_arg (int, va_list *, int *, void **);
#define SUPPRESS 0x10 /* suppress assignment */
#define POINTER 0x20 /* weird %p pointer (`fake hex') */
#define NOSKIP 0x40 /* do not skip blanks */
#define MALLOC 0x80 /* handle 'm' modifier */
/*
* The following are used in numeric conversions only:
@ -424,6 +425,125 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
#ifndef _NO_LONGLONG
long long *llp;
#endif
#ifdef _WANT_IO_C99_FORMATS
#define _WANT_IO_POSIX_EXTENSIONS
#endif
#ifdef _WANT_IO_POSIX_EXTENSIONS
/* POSIX requires that fwscanf frees all allocated strings from 'm'
conversions in case it returns EOF. m_ptr is used to keep track.
It will be allocated on the stack the first time an 'm' conversion
takes place, and it will be free'd on return from the function.
This implementation tries to save space by only allocating 8
pointer slots at a time. Most scenarios should never have to call
realloc again. This implementation allows only up to 65528 'm'
conversions per fwscanf invocation for now. That should be enough
for almost all scenarios, right? */
struct m_ptrs {
void ***m_arr; /* Array of pointer args to 'm' conversion */
uint16_t m_siz; /* Number of slots in m_arr */
uint16_t m_cnt; /* Number of valid entries in m_arr */
} *m_ptr = NULL;
#define init_m_ptr() \
do \
{ \
if (!m_ptr) \
{ \
m_ptr = (struct m_ptrs *) alloca (sizeof *m_ptr); \
m_ptr->m_arr = NULL; \
m_ptr->m_siz = 0; \
m_ptr->m_cnt = 0; \
} \
} \
while (0)
#define push_m_ptr(arg) \
do \
{ \
if (m_ptr->m_cnt >= m_ptr->m_siz) \
{ \
void ***n = NULL; \
\
if (m_ptr->m_siz + 8 > 0 && m_ptr->m_siz + 8 < UINT16_MAX) \
n = (void ***) realloc (m_ptr->m_arr, \
(m_ptr->m_siz + 8) * \
sizeof (void **)); \
if (!n) \
{ \
nassigned = EOF; \
goto match_failure; \
} \
m_ptr->m_arr = n; \
m_ptr->m_siz += 8; \
} \
m_ptr->m_arr[m_ptr->m_cnt++] = (void **) (arg); \
} \
while (0)
#define alloc_m_ptr(_type, _p, _p0, _p_p, _w) \
({ \
_p_p = GET_ARG (N, ap, _type **); \
if (!_p_p) \
goto match_failure; \
_p0 = (_type *) malloc ((_w) * sizeof (_type)); \
if (!_p0) \
{ \
nassigned = EOF; \
goto match_failure; \
} \
*_p_p = _p0; \
push_m_ptr (_p_p); \
_p = _p0; \
_w; \
})
#define realloc_m_ptr(_type, _p, _p0, _p_p, _w) \
({ \
size_t _nw = (_w); \
ptrdiff_t _dif = _p - _p0; \
if (_p_p && \
((sizeof (_type) == 1 && _dif >= _nw - MB_CUR_MAX) \
|| (sizeof (_type) != 1 && _dif == _nw))) \
{ \
_p0 = (_type *) realloc (_p0, (_nw << 1) * sizeof (_type)); \
if (!_p0) \
{ \
nassigned = EOF; \
goto match_failure; \
} \
_p = _p0 + _dif; \
*_p_p = _p0; \
_nw <<= 1; \
} \
_nw; \
})
#define shrink_m_ptr(_type, _p_p, _w, _cw) \
({ \
size_t _nw = (_w); \
if (_p_p && _nw < _cw) \
{ \
_type *_np_p = (_type *) \
realloc (*_p_p, _nw * sizeof (_type)); \
if (_np_p) \
*_p_p = _np_p; \
} \
})
#define free_m_ptr() \
do \
{ \
if (m_ptr) \
{ \
if (nassigned == EOF) \
{ \
int i; \
for (i = 0; i < m_ptr->m_cnt; ++i) \
{ \
free (*m_ptr->m_arr[i]); \
*m_ptr->m_arr[i] = NULL; \
} \
} \
if (m_ptr->m_arr) \
free (m_ptr->m_arr); \
} \
} \
while (0)
#endif
/* `basefix' is used to avoid `if' tests in the integer scanner */
static _CONST short basefix[17] =
@ -518,7 +638,7 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
continue;
case L'*':
if ((flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS))
if ((flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS | MALLOC))
|| width)
flags |= SUPPRESS;
goto again;
@ -598,6 +718,14 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
flags |= LONGDBL;
goto again;
#endif /* _WANT_IO_C99_FORMATS */
#ifdef _WANT_IO_POSIX_EXTENSIONS
case 'm':
if (flags & (CHAR | SHORT | LONG | LONGDBL | MALLOC))
goto match_failure;
init_m_ptr ();
flags |= MALLOC;
goto again;
#endif
case L'0':
case L'1':
@ -609,14 +737,14 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
case L'7':
case L'8':
case L'9':
if (flags & (CHAR | SHORT | LONG | LONGDBL))
if (flags & (CHAR | SHORT | LONG | LONGDBL | MALLOC))
goto match_failure;
width = width * 10 + c - L'0';
goto again;
#ifndef _NO_POS_ARGS
case L'$':
if (flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS))
if (flags & (CHAR | SHORT | LONG | LONGDBL | SUPPRESS | MALLOC))
goto match_failure;
if (width <= MAX_POS_ARGS)
{
@ -787,7 +915,19 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
width = 1;
if (flags & LONG)
{
if (!(flags & SUPPRESS))
#ifdef _WANT_IO_POSIX_EXTENSIONS
wchar_t **p_p = NULL;
wchar_t *p0 = NULL;
size_t width0 = 0;
#endif
if (flags & SUPPRESS)
;
#ifdef _WANT_IO_POSIX_EXTENSIONS
else if (flags & MALLOC)
width0 = alloc_m_ptr (wchar_t, p, p0, p_p, width);
#endif
else
p = GET_ARG(N, ap, wchar_t *);
n = 0;
while (width-- != 0 && (wi = _fgetwc_r (rptr, fp)) != WEOF)
@ -799,12 +939,27 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
if (n == 0)
goto input_failure;
nread += n;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (wchar_t, p_p, width0 - width, width0);
#endif
if (!(flags & SUPPRESS))
nassigned++;
}
else
{
if (!(flags & SUPPRESS))
#ifdef _WANT_IO_POSIX_EXTENSIONS
char **mbp_p = NULL;
char *mbp0 = NULL;
size_t width0 = 0;
#endif
if (flags & SUPPRESS)
;
#ifdef _WANT_IO_POSIX_EXTENSIONS
else if (flags & MALLOC)
width0 = alloc_m_ptr (char, mbp, mbp0, mbp_p, width);
#endif
else
mbp = GET_ARG(N, ap, char *);
n = 0;
memset ((_PTR)&mbs, '\0', sizeof (mbstate_t));
@ -837,6 +992,9 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
if (n == 0)
goto input_failure;
nread += n;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (char, mbp_p, width0 - width, width0);
#endif
if (!(flags & SUPPRESS))
nassigned++;
}
@ -860,27 +1018,58 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
}
else if (flags & LONG)
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
wchar_t **p_p = NULL;
size_t p_siz = 0;
if (flags & MALLOC)
p_siz = alloc_m_ptr (wchar_t, p, p0, p_p, 32);
else
#endif
p0 = p = GET_ARG(N, ap, wchar_t *);
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
&& width-- != 0 && INCCL (wi))
{
*p++ = (wchar_t) wi;
#ifdef _WANT_IO_POSIX_EXTENSIONS
p_siz = realloc_m_ptr (wchar_t, p, p0, p_p, p_siz);
#endif
}
if (wi != WEOF)
_ungetwc_r (rptr, wi, fp);
n = p - p0;
if (n == 0)
goto match_failure;
*p = L'\0';
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (wchar_t, p_p, n + 1, p_siz);
#endif
nassigned++;
}
else
{
if (!(flags & SUPPRESS))
#ifdef _WANT_IO_POSIX_EXTENSIONS
char **mbp_p = NULL;
char *mbp0 = NULL;
size_t mbp_siz = 0;
#endif
if (flags & SUPPRESS)
;
#ifdef _WANT_IO_POSIX_EXTENSIONS
else if (flags & MALLOC)
mbp_siz = alloc_m_ptr (char, mbp, mbp0, mbp_p, 32);
#endif
else
mbp = GET_ARG(N, ap, char *);
n = 0;
memset ((_PTR) &mbs, '\0', sizeof (mbstate_t));
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
&& width != 0 && INCCL (wi))
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
mbp_siz = realloc_m_ptr (char, mbp, mbp0, mbp_p, mbp_siz);
#endif
if (width >= MB_CUR_MAX && !(flags & SUPPRESS))
{
nconv = _wcrtomb_r (rptr, mbp, wi, &mbs);
@ -907,6 +1096,9 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
if (!(flags & SUPPRESS))
{
*mbp = 0;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (char, mbp_p, mbp - mbp0 + 1, mbp_siz);
#endif
nassigned++;
}
}
@ -927,26 +1119,55 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
}
else if (flags & LONG)
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
wchar_t **p_p = NULL;
size_t p_siz = 0;
if (flags & MALLOC)
p_siz = alloc_m_ptr (wchar_t, p, p0, p_p, 32);
else
#endif
p0 = p = GET_ARG(N, ap, wchar_t *);
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
&& width-- != 0 && !iswspace (wi))
{
*p++ = (wchar_t) wi;
nread++;
#ifdef _WANT_IO_POSIX_EXTENSIONS
p_siz = realloc_m_ptr (wchar_t, p, p0, p_p, p_siz);
#endif
}
if (wi != WEOF)
_ungetwc_r (rptr, wi, fp);
*p = L'\0';
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (wchar_t, p_p, p - p0 + 1, p_siz);
#endif
nassigned++;
}
else
{
if (!(flags & SUPPRESS))
#ifdef _WANT_IO_POSIX_EXTENSIONS
char **mbp_p = NULL;
char *mbp0 = NULL;
size_t mbp_siz = 0;
#endif
if (flags & SUPPRESS)
;
#ifdef _WANT_IO_POSIX_EXTENSIONS
else if (flags & MALLOC)
mbp_siz = alloc_m_ptr (char, mbp, mbp0, mbp_p, 32);
#endif
else
mbp = GET_ARG(N, ap, char *);
memset ((_PTR) &mbs, '\0', sizeof (mbstate_t));
while ((wi = _fgetwc_r (rptr, fp)) != WEOF
&& width != 0 && !iswspace (wi))
{
#ifdef _WANT_IO_POSIX_EXTENSIONS
mbp_siz = realloc_m_ptr (char, mbp, mbp0, mbp_p, mbp_siz);
#endif
if (width >= MB_CUR_MAX && !(flags & SUPPRESS))
{
nconv = wcrtomb(mbp, wi, &mbs);
@ -973,6 +1194,9 @@ _DEFUN(__SVFWSCANF_R, (rptr, fp, fmt0, ap),
if (!(flags & SUPPRESS))
{
*mbp = 0;
#ifdef _WANT_IO_POSIX_EXTENSIONS
shrink_m_ptr (char, mbp_p, mbp - mbp0 + 1, mbp_siz);
#endif
nassigned++;
}
}
@ -1492,6 +1716,9 @@ match_failure:
all_done:
/* Return number of matches, which can be 0 on match failure. */
_newlib_flockfile_end (fp);
#ifdef _WANT_IO_POSIX_EXTENSIONS
free_m_ptr ();
#endif
return nassigned;
}