#if 0
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)vfscanf.c 8.1 (Berkeley) 6/4/93";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdio/vfwscanf.c,v 1.17 2009/01/19 06:19:51 das Exp $");
#include "xlocale_private.h"
#include "namespace.h"
#include <ctype.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdarg.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "local.h"
#ifndef NO_FLOATING_POINT
#include <locale.h>
#endif
#define BUF 513
#define LONG 0x01
#define LONGDBL 0x02
#define SHORT 0x04
#define SUPPRESS 0x08
#define POINTER 0x10
#define NOSKIP 0x20
#define LONGLONG 0x400
#define INTMAXT 0x800
#define PTRDIFFT 0x1000
#define SIZET 0x2000
#define SHORTSHORT 0x4000
#define UNSIGNED 0x8000
#define SIGNOK 0x40
#define NDIGITS 0x80
#define PFXOK 0x100
#define NZDIGITS 0x200
#define HAVESIGN 0x10000
#define CT_CHAR 0
#define CT_CCL 1
#define CT_STRING 2
#define CT_INT 3
#define CT_FLOAT 4
#ifndef NO_FLOATING_POINT
static int parsefloat(FILE *, wchar_t **, size_t, locale_t loc);
#endif
#define INCCL(_c) \
(cclcompl ? (wmemchr(ccls, (_c), ccle - ccls) == NULL) : \
(wmemchr(ccls, (_c), ccle - ccls) != NULL))
static const mbstate_t initial_mbs;
int
vfwscanf(FILE * __restrict fp, const wchar_t * __restrict fmt, va_list ap)
{
int ret;
FLOCKFILE(fp);
ORIENT(fp, 1);
ret = __vfwscanf(fp, __current_locale(), fmt, ap);
FUNLOCKFILE(fp);
return (ret);
}
int
vfwscanf_l(FILE * __restrict fp, locale_t loc, const wchar_t * __restrict fmt,
va_list ap)
{
int ret;
NORMALIZE_LOCALE(loc);
FLOCKFILE(fp);
ORIENT(fp, 1);
ret = __vfwscanf(fp, loc, fmt, ap);
FUNLOCKFILE(fp);
return (ret);
}
__private_extern__ int
__vfwscanf(FILE * __restrict fp, locale_t loc, const wchar_t * __restrict fmt,
va_list ap)
{
wint_t c;
size_t width;
wchar_t *p;
int n;
int flags;
wchar_t *p0;
int nassigned;
int nread;
int base;
wchar_t buf[BUF];
const wchar_t *ccls;
const wchar_t *ccle;
int cclcompl;
wint_t wi;
char *mbp;
size_t nconv;
char mbbuf[MB_LEN_MAX];
int index;
va_list ap_orig;
mbstate_t mbs;
int mb_cur_max = MB_CUR_MAX_L(loc);
static const short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
nassigned = 0;
nread = 0;
ccls = ccle = NULL;
va_copy(ap_orig, ap);
for (;;) {
c = *fmt++;
if (c == 0)
return (nassigned);
if (iswspace_l(c, loc)) {
while ((c = __fgetwc(fp, loc)) != WEOF &&
iswspace_l(c, loc))
;
if (c != WEOF)
__ungetwc(c, fp, loc);
continue;
}
if (c != '%') {
if ((wi = __fgetwc(fp, loc)) == WEOF)
goto input_failure;
goto literal;
}
width = 0;
flags = 0;
again: c = *fmt++;
switch (c) {
case '%':
for(;;) {
if ((wi = __fgetwc(fp, loc)) == WEOF)
goto input_failure;
if (!iswspace_l(wi, loc))
break;
nread++;
}
literal:
if (wi != c) {
__ungetwc(wi, fp, loc);
goto match_failure;
}
nread++;
continue;
case '$':
index = width;
if (index < 1 || index > NL_ARGMAX || fmt[-3] != '%') {
goto input_failure;
}
width = 0;
va_end(ap);
va_copy(ap, ap_orig);
for (; index > 1; index--) {
va_arg(ap, void*);
}
goto again;
case '*':
flags |= SUPPRESS;
goto again;
case 'j':
flags |= INTMAXT;
goto again;
case 'l':
if (flags & LONG) {
flags &= ~LONG;
flags |= LONGLONG;
} else
flags |= LONG;
goto again;
case 'q':
flags |= LONGLONG;
goto again;
case 't':
flags |= PTRDIFFT;
goto again;
case 'z':
flags |= SIZET;
goto again;
case 'L':
flags |= LONGDBL;
goto again;
case 'h':
if (flags & SHORT) {
flags &= ~SHORT;
flags |= SHORTSHORT;
} else
flags |= SHORT;
goto again;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
width = width * 10 + c - '0';
goto again;
case 'd':
c = CT_INT;
base = 10;
break;
case 'i':
c = CT_INT;
base = 0;
break;
case 'o':
c = CT_INT;
flags |= UNSIGNED;
base = 8;
break;
case 'u':
c = CT_INT;
flags |= UNSIGNED;
base = 10;
break;
case 'X':
case 'x':
flags |= PFXOK;
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
#ifndef NO_FLOATING_POINT
case 'A': case 'E': case 'F': case 'G':
case 'a': case 'e': case 'f': case 'g':
c = CT_FLOAT;
break;
#endif
case 'S':
flags |= LONG;
case 's':
c = CT_STRING;
break;
case '[':
ccls = fmt;
if (*fmt == '^') {
cclcompl = 1;
fmt++;
} else
cclcompl = 0;
if (*fmt == ']')
fmt++;
while (*fmt != '\0' && *fmt != ']')
fmt++;
ccle = fmt;
fmt++;
flags |= NOSKIP;
c = CT_CCL;
break;
case 'C':
flags |= LONG;
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p':
flags |= POINTER | PFXOK;
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 'n':
{
if (flags & SUPPRESS)
continue;
void *ptr = va_arg(ap, void *);
if (ptr == NULL)
continue;
else if (flags & SHORTSHORT)
*(char *)ptr = nread;
else if (flags & SHORT)
*(short *)ptr = nread;
else if (flags & LONG)
*(long *)ptr = nread;
else if (flags & LONGLONG)
*(long long *)ptr = nread;
else if (flags & INTMAXT)
*(intmax_t *)ptr = nread;
else if (flags & SIZET)
*(size_t *)ptr = nread;
else if (flags & PTRDIFFT)
*(ptrdiff_t *)ptr = nread;
else
*(int *)ptr = nread;
continue;
}
default:
goto match_failure;
case '\0':
return (EOF);
}
if ((flags & NOSKIP) == 0) {
while ((wi = __fgetwc(fp, loc)) != WEOF && iswspace_l(wi, loc))
nread++;
if (wi == WEOF)
goto input_failure;
__ungetwc(wi, fp, loc);
}
switch (c) {
case CT_CHAR:
if (width == 0)
width = 1;
if (flags & LONG) {
if (!(flags & SUPPRESS))
p = va_arg(ap, wchar_t *);
n = 0;
while (width-- != 0 &&
(wi = __fgetwc(fp, loc)) != WEOF) {
if (!(flags & SUPPRESS))
*p++ = (wchar_t)wi;
n++;
}
if (n == 0)
goto input_failure;
nread += n;
if (!(flags & SUPPRESS))
nassigned++;
} else {
if (!(flags & SUPPRESS))
mbp = va_arg(ap, char *);
n = 0;
mbs = initial_mbs;
while (width != 0 &&
(wi = __fgetwc(fp, loc)) != WEOF) {
if (width >= mb_cur_max &&
!(flags & SUPPRESS)) {
nconv = wcrtomb_l(mbp, wi, &mbs, loc);
if (nconv == (size_t)-1)
goto input_failure;
} else {
nconv = wcrtomb_l(mbbuf, wi,
&mbs, loc);
if (nconv == (size_t)-1)
goto input_failure;
if (nconv > width) {
__ungetwc(wi, fp, loc);
break;
}
if (!(flags & SUPPRESS))
memcpy(mbp, mbbuf,
nconv);
}
if (!(flags & SUPPRESS))
mbp += nconv;
width -= nconv;
n++;
}
if (n == 0)
goto input_failure;
nread += n;
if (!(flags & SUPPRESS))
nassigned++;
}
break;
case CT_CCL:
if (width == 0)
width = (size_t)~0;
if ((flags & SUPPRESS) && (flags & LONG)) {
n = 0;
while ((wi = __fgetwc(fp, loc)) != WEOF &&
width-- != 0 && INCCL(wi))
n++;
if (wi != WEOF)
__ungetwc(wi, fp, loc);
if (n == 0)
goto match_failure;
} else if (flags & LONG) {
p0 = p = va_arg(ap, wchar_t *);
while ((wi = __fgetwc(fp, loc)) != WEOF &&
width-- != 0 && INCCL(wi))
*p++ = (wchar_t)wi;
if (wi != WEOF)
__ungetwc(wi, fp, loc);
n = p - p0;
if (n == 0)
goto match_failure;
*p = 0;
nassigned++;
} else {
if (!(flags & SUPPRESS))
mbp = va_arg(ap, char *);
n = 0;
mbs = initial_mbs;
while ((wi = __fgetwc(fp, loc)) != WEOF &&
width != 0 && INCCL(wi)) {
if (width >= mb_cur_max &&
!(flags & SUPPRESS)) {
nconv = wcrtomb_l(mbp, wi, &mbs, loc);
if (nconv == (size_t)-1)
goto input_failure;
} else {
nconv = wcrtomb_l(mbbuf, wi,
&mbs, loc);
if (nconv == (size_t)-1)
goto input_failure;
if (nconv > width)
break;
if (!(flags & SUPPRESS))
memcpy(mbp, mbbuf,
nconv);
}
if (!(flags & SUPPRESS))
mbp += nconv;
width -= nconv;
n++;
}
if (wi != WEOF)
__ungetwc(wi, fp, loc);
if (n == 0)
goto match_failure;
if (!(flags & SUPPRESS)) {
*mbp = 0;
nassigned++;
}
}
nread += n;
break;
case CT_STRING:
if (width == 0)
width = (size_t)~0;
if ((flags & SUPPRESS) && (flags & LONG)) {
while ((wi = __fgetwc(fp, loc)) != WEOF &&
width-- != 0 &&
!iswspace_l(wi, loc))
nread++;
if (wi != WEOF)
__ungetwc(wi, fp, loc);
} else if (flags & LONG) {
p0 = p = va_arg(ap, wchar_t *);
while ((wi = __fgetwc(fp, loc)) != WEOF &&
width-- != 0 &&
!iswspace_l(wi, loc)) {
*p++ = (wchar_t)wi;
nread++;
}
if (wi != WEOF)
__ungetwc(wi, fp, loc);
*p = '\0';
nassigned++;
} else {
if (!(flags & SUPPRESS))
mbp = va_arg(ap, char *);
mbs = initial_mbs;
while ((wi = __fgetwc(fp, loc)) != WEOF &&
width != 0 &&
!iswspace_l(wi, loc)) {
if (width >= mb_cur_max &&
!(flags & SUPPRESS)) {
nconv = wcrtomb_l(mbp, wi, &mbs, loc);
if (nconv == (size_t)-1)
goto input_failure;
} else {
nconv = wcrtomb_l(mbbuf, wi,
&mbs, loc);
if (nconv == (size_t)-1)
goto input_failure;
if (nconv > width)
break;
if (!(flags & SUPPRESS))
memcpy(mbp, mbbuf,
nconv);
}
if (!(flags & SUPPRESS))
mbp += nconv;
width -= nconv;
nread++;
}
if (wi != WEOF)
__ungetwc(wi, fp, loc);
if (!(flags & SUPPRESS)) {
*mbp = 0;
nassigned++;
}
}
continue;
case CT_INT:
if (width == 0 || width > sizeof(buf) /
sizeof(*buf) - 1)
width = sizeof(buf) / sizeof(*buf) - 1;
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = __fgetwc(fp, loc);
switch (c) {
case '0':
if (base == 0) {
base = 8;
flags |= PFXOK;
}
if (flags & NZDIGITS)
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
else
flags &= ~(SIGNOK|PFXOK|NDIGITS);
goto ok;
case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
base = basefix[base];
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
case '8': case '9':
base = basefix[base];
if (base <= 8)
break;
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
if (base <= 10)
break;
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
flags |= HAVESIGN;
goto ok;
}
break;
case 'x': case 'X':
if (flags & PFXOK && p ==
buf + 1 + !!(flags & HAVESIGN)) {
base = 16;
flags &= ~PFXOK;
goto ok;
}
break;
}
if (c != WEOF)
__ungetwc(c, fp, loc);
break;
ok:
*p++ = (wchar_t)c;
}
if (flags & NDIGITS) {
if (p > buf)
__ungetwc(*--p, fp, loc);
goto match_failure;
}
c = p[-1];
if (c == 'x' || c == 'X') {
--p;
__ungetwc(c, fp, loc);
}
if ((flags & SUPPRESS) == 0) {
uintmax_t res;
*p = 0;
if ((flags & UNSIGNED) == 0)
res = wcstoimax_l(buf, NULL, base, loc);
else
res = wcstoumax_l(buf, NULL, base, loc);
if (flags & POINTER)
*va_arg(ap, void **) =
(void *)(uintptr_t)res;
else if (flags & SHORTSHORT)
*va_arg(ap, char *) = res;
else if (flags & SHORT)
*va_arg(ap, short *) = res;
else if (flags & LONG)
*va_arg(ap, long *) = res;
else if (flags & LONGLONG)
*va_arg(ap, long long *) = res;
else if (flags & INTMAXT)
*va_arg(ap, intmax_t *) = res;
else if (flags & PTRDIFFT)
*va_arg(ap, ptrdiff_t *) = res;
else if (flags & SIZET)
*va_arg(ap, size_t *) = res;
else
*va_arg(ap, int *) = res;
nassigned++;
}
nread += p - buf;
break;
#ifndef NO_FLOATING_POINT
case CT_FLOAT:
{
wchar_t *pbuf;
if ((width = parsefloat(fp, &pbuf, width, loc)) == 0)
goto match_failure;
if ((flags & SUPPRESS) == 0) {
if (flags & LONGDBL) {
long double res = wcstold_l(pbuf, &p, loc);
*va_arg(ap, long double *) = res;
} else if (flags & LONG) {
double res = wcstod_l(pbuf, &p, loc);
*va_arg(ap, double *) = res;
} else {
float res = wcstof_l(pbuf, &p, loc);
*va_arg(ap, float *) = res;
}
nassigned++;
}
nread += width;
break;
}
#endif
}
}
input_failure:
return (nassigned ? nassigned : EOF);
match_failure:
return (nassigned);
}
#ifndef NO_FLOATING_POINT
extern char *__parsefloat_buf(size_t s);
static int
parsefloat(FILE *fp, wchar_t **buf, size_t width, locale_t loc)
{
mbstate_t mbs;
size_t nconv;
wchar_t *commit, *p;
int infnanpos = 0;
enum {
S_START, S_GOTSIGN, S_INF, S_NAN, S_DONE, S_MAYBEHEX,
S_DIGITS, S_FRAC, S_EXP, S_EXPDIGITS
} state = S_START;
wchar_t c;
wchar_t decpt;
_Bool gotmantdig = 0, ishex = 0;
wchar_t *b;
wchar_t *e;
size_t s;
mbs = initial_mbs;
nconv = mbrtowc_l(&decpt, localeconv()->decimal_point, MB_CUR_MAX_L(loc), &mbs, loc);
if (nconv == (size_t)-1 || nconv == (size_t)-2)
decpt = '.';
s = (width == 0 ? BUF : (width + 1));
if ((b = (wchar_t *)__parsefloat_buf(s * sizeof(wchar_t))) == NULL) {
*buf = NULL;
return 0;
}
e = b + (s - 1);
commit = b - 1;
c = WEOF;
for (p = b; width == 0 || p < e; ) {
if ((c = __fgetwc(fp, loc)) == WEOF)
break;
reswitch:
switch (state) {
case S_START:
state = S_GOTSIGN;
if (c == '-' || c == '+')
break;
else
goto reswitch;
case S_GOTSIGN:
switch (c) {
case '0':
state = S_MAYBEHEX;
commit = p;
break;
case 'I':
case 'i':
state = S_INF;
break;
case 'N':
case 'n':
state = S_NAN;
break;
default:
state = S_DIGITS;
goto reswitch;
}
break;
case S_INF:
if (infnanpos > 6 ||
(c != "nfinity"[infnanpos] &&
c != "NFINITY"[infnanpos]))
goto parsedone;
if (infnanpos == 1 || infnanpos == 6)
commit = p;
infnanpos++;
break;
case S_NAN:
switch (infnanpos) {
case 0:
if (c != 'A' && c != 'a')
goto parsedone;
break;
case 1:
if (c != 'N' && c != 'n')
goto parsedone;
else
commit = p;
break;
case 2:
if (c != '(')
goto parsedone;
break;
default:
if (c == ')') {
commit = p;
state = S_DONE;
} else if (!iswalnum_l(c, loc) && c != '_')
goto parsedone;
break;
}
infnanpos++;
break;
case S_DONE:
goto parsedone;
case S_MAYBEHEX:
state = S_DIGITS;
if (c == 'X' || c == 'x') {
ishex = 1;
break;
} else {
gotmantdig = 1;
goto reswitch;
}
case S_DIGITS:
if ((ishex && iswxdigit_l(c, loc)) || iswdigit_l(c, loc))
gotmantdig = 1;
else {
state = S_FRAC;
if (c != decpt)
goto reswitch;
}
if (gotmantdig)
commit = p;
break;
case S_FRAC:
if (((c == 'E' || c == 'e') && !ishex) ||
((c == 'P' || c == 'p') && ishex)) {
if (!gotmantdig)
goto parsedone;
else
state = S_EXP;
} else if ((ishex && iswxdigit_l(c, loc)) || iswdigit_l(c, loc)) {
commit = p;
gotmantdig = 1;
} else
goto parsedone;
break;
case S_EXP:
state = S_EXPDIGITS;
if (c == '-' || c == '+')
break;
else
goto reswitch;
case S_EXPDIGITS:
if (iswdigit_l(c, loc))
commit = p;
else
goto parsedone;
break;
default:
LIBC_ABORT("unknown state %d", state);
}
if (p >= e) {
ssize_t diff = (p - b);
ssize_t com = (commit - b);
s += BUF;
b = (wchar_t *)__parsefloat_buf(s * sizeof(wchar_t));
if (b == NULL) {
*buf = NULL;
return 0;
}
e = b + (s - 1);
p = b + diff;
commit = b + com;
}
*p++ = c;
c = WEOF;
}
parsedone:
if (c != WEOF)
__ungetwc(c, fp, loc);
while (commit < --p)
__ungetwc(*p, fp, loc);
*++commit = '\0';
*buf = b;
return (commit - b);
}
#endif