int
vsscanf(const char *inp, char const *fmt0, va_list ap)
{
int inr;
const u_char *fmt = (const u_char *)fmt0;
int c; /* character from format, or conversion */
size_t width; /* field width, or 0 */
char *p; /* points into all kinds of strings */
int n; /* handy integer */
int flags; /* flags as defined above */
char *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nconversions; /* number of conversions */
int nread; /* number of characters consumed from fp */
int base; /* base argument to conversion function */
char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric conversions */
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
inr = strlen(inp);
nassigned = 0;
nconversions = 0;
nread = 0;
base = 0; /* XXX just to keep gcc happy */
for (;;) {
c = *fmt++;
if (c == 0)
return (nassigned);
if (isspace(c)) {
while (inr > 0 && isspace(*inp))
nread++, inr--, inp++;
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case '%':
literal:
if (inr <= 0)
goto input_failure;
if (*inp != c)
goto match_failure;
inr--, inp++;
nread++;
continue;
case '*':
flags |= SUPPRESS;
goto again;
case 'l':
if (flags & LONG) {
flags &= ~LONG;
flags |= LONGLONG;
} else
flags |= LONG;
goto again;
case 'q':
flags |= LONGLONG; /* not quite */
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;
/*
* Conversions.
*/
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; /* enable 0x prefixing */
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 's':
c = CT_STRING;
break;
case '[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 'n':
nconversions++;
if (flags & SUPPRESS) /* ??? */
continue;
if (flags & SHORTSHORT)
*va_arg(ap, char *) = nread;
else if (flags & SHORT)
*va_arg(ap, short *) = nread;
else if (flags & LONG)
*va_arg(ap, long *) = nread;
else if (flags & LONGLONG)
*va_arg(ap, long long *) = nread;
else
*va_arg(ap, int *) = nread;
continue;
}
/*
* We have a conversion that requires input.
*/
if (inr <= 0)
goto input_failure;
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
while (isspace(*inp)) {
nread++;
if (--inr > 0)
inp++;
else
goto input_failure;
}
/*
* Note that there is at least one character in
* the buffer, so conversions that do not set NOSKIP
* can no longer result in an input failure.
*/
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0)
width = 1;
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((n = inr) < (int)width) {
sum += n;
width -= n;
inp += n;
if (sum == 0)
goto input_failure;
break;
} else {
sum += width;
inr -= width;
inp += width;
break;
}
}
nread += sum;
} else {
bcopy(inp, va_arg(ap, char *), width);
inr -= width;
inp += width;
nread += width;
nassigned++;
}
nconversions++;
break;
case CT_CCL:
/* scan a (nonempty) character class (sets NOSKIP) */
if (width == 0)
width = (size_t)~0; /* `infinity' */
/* take only those things in the class */
if (flags & SUPPRESS) {
n = 0;
while (ccltab[(unsigned char)*inp]) {
n++, inr--, inp++;
if (--width == 0)
break;
if (inr <= 0) {
if (n == 0)
goto input_failure;
break;
}
}
if (n == 0)
goto match_failure;
} else {
p0 = p = va_arg(ap, char *);
while (ccltab[(unsigned char)*inp]) {
inr--;
*p++ = *inp++;
if (--width == 0)
break;
if (inr <= 0) {
if (p == p0)
goto input_failure;
break;
}
}
n = p - p0;
if (n == 0)
goto match_failure;
*p = 0;
nassigned++;
}
nread += n;
nconversions++;
break;
case CT_STRING:
/* like CCL, but zero-length string OK, & no NOSKIP */
if (width == 0)
width = (size_t)~0;
if (flags & SUPPRESS) {
n = 0;
while (!isspace(*inp)) {
n++, inr--, inp++;
if (--width == 0)
break;
if (inr <= 0)
break;
}
nread += n;
} else {
p0 = p = va_arg(ap, char *);
while (!isspace(*inp)) {
inr--;
*p++ = *inp++;
if (--width == 0)
break;
if (inr <= 0)
break;
}
*p = 0;
nread += p - p0;
nassigned++;
}
nconversions++;
continue;
case CT_INT:
/* scan an integer as if by the conversion function */
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
/* size_t is unsigned, hence this optimisation */
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = *inp;
/*
* Switch on the character; `goto ok'
* if we accept it as a part of number.
*/
switch (c) {
/*
* The digit 0 is always legal, but is
* special. For %i conversions, if no
* digits (zero or nonzero) have been
* scanned (only signs), we will have
* base==0. In that case, we should set
* it to 8 and enable 0x prefixing.
* Also, if we have not scanned zero digits
* before this, do not turn off prefixing
* (someone else will turn it off if we
* have scanned any nonzero digits).
*/
case '0':
if (base == 0) {
base = 8;
flags |= PFXOK;
}
if (flags & NZDIGITS)
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
else
flags &= ~(SIGNOK|PFXOK|NDIGITS);
goto ok;
/* 1 through 7 always legal */
case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
base = basefix[base];
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* digits 8 and 9 ok iff decimal or hex */
case '8': case '9':
base = basefix[base];
if (base <= 8)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* letters ok iff hex */
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
/* no need to fix base here */
if (base <= 10)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* sign ok only as first character */
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto ok;
}
break;
/* x ok iff flag still set & 2nd char */
case 'x': case 'X':
if (flags & PFXOK && p == buf + 1) {
base = 16; /* if %i */
flags &= ~PFXOK;
goto ok;
}
break;
}
/*
* If we got here, c is not a legal character
* for a number. Stop accumulating digits.
*/
break;
ok:
/*
* c is legal: store it and look at the next.
*/
*p++ = c;
if (--inr > 0)
inp++;
else
break; /* end of input */
}
/*
* If we had only a sign, it is no good; push
* back the sign. If the number ends in `x',
* it was [sign] '0' 'x', so push back the x
* and treat it as [sign] '0'.
*/
if (flags & NDIGITS) {
if (p > buf) {
inp--;
inr++;
}
goto match_failure;
}
c = ((u_char *)p)[-1];
if (c == 'x' || c == 'X') {
--p;
inp--;
inr++;
}
if ((flags & SUPPRESS) == 0) {
u_quad_t res;
*p = 0;
if ((flags & UNSIGNED) == 0)
res = strtoq(buf, (char **)NULL, base);
else
res = strtouq(buf, (char **)NULL, base);
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
*va_arg(ap, int *) = res;
nassigned++;
}
nread += p - buf;
nconversions++;
break;
}
}
input_failure:
return (nconversions != 0 ? nassigned : -1);
match_failure:
return (nassigned);
}
/*
* Internal, unlocked version of vfscanf
*/
int
__svfscanf(FILE *fp, const char *fmt0, __va_list ap)
{
u_char *fmt = (u_char *)fmt0;
int c; /* character from format, or conversion */
size_t width; /* field width, or 0 */
char *p; /* points into all kinds of strings */
int n; /* handy integer */
int flags; /* flags as defined above */
char *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nread; /* number of characters consumed from fp */
int base; /* base argument to strtoimax/strtouimax */
char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric conversions */
#ifdef SCANF_WIDE_CHAR
wchar_t *wcp; /* handy wide character pointer */
size_t nconv; /* length of multibyte sequence converted */
mbstate_t mbs;
#endif
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
_SET_ORIENTATION(fp, -1);
nassigned = 0;
nread = 0;
base = 0; /* XXX just to keep gcc happy */
for (;;) {
c = *fmt++;
if (c == 0)
return (nassigned);
if (isspace(c)) {
while ((fp->_r > 0 || __srefill(fp) == 0) &&
isspace(*fp->_p))
nread++, fp->_r--, fp->_p++;
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case '%':
literal:
if (fp->_r <= 0 && __srefill(fp))
goto input_failure;
if (*fp->_p != c)
goto match_failure;
fp->_r--, fp->_p++;
nread++;
continue;
case '*':
flags |= SUPPRESS;
goto again;
case 'j':
flags |= MAXINT;
goto again;
case 'L':
flags |= LONGDBL;
goto again;
case 'h':
if (*fmt == 'h') {
fmt++;
flags |= SHORTSHORT;
} else {
flags |= SHORT;
}
goto again;
case 'l':
if (*fmt == 'l') {
fmt++;
flags |= LLONG;
} else {
flags |= LONG;
}
goto again;
case 'q':
flags |= LLONG; /* deprecated */
goto again;
case 't':
flags |= PTRINT;
goto again;
case 'z':
flags |= SIZEINT;
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;
/*
* Conversions.
* Those marked `compat' are for 4.[123]BSD compatibility.
*
* (According to ANSI, E and X formats are supposed
* to the same as e and x. Sorry about that.)
*/
case 'D': /* compat */
flags |= LONG;
/* FALLTHROUGH */
case 'd':
c = CT_INT;
base = 10;
break;
case 'i':
c = CT_INT;
base = 0;
break;
case 'O': /* compat */
flags |= LONG;
/* FALLTHROUGH */
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; /* enable 0x prefixing */
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
#ifdef FLOATING_POINT
case 'e': case 'E':
case 'f': case 'F':
case 'g': case 'G':
case 'a': case 'A':
c = CT_FLOAT;
break;
#endif
case 's':
c = CT_STRING;
break;
case '[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 'n':
if (flags & SUPPRESS)
continue;
if (flags & SHORTSHORT)
*va_arg(ap, signed char *) = nread;
else if (flags & SHORT)
*va_arg(ap, short *) = nread;
else if (flags & LONG)
*va_arg(ap, long *) = nread;
else if (flags & SIZEINT)
*va_arg(ap, ssize_t *) = nread;
else if (flags & PTRINT)
*va_arg(ap, ptrdiff_t *) = nread;
else if (flags & LLONG)
*va_arg(ap, long long *) = nread;
else if (flags & MAXINT)
*va_arg(ap, intmax_t *) = nread;
else
*va_arg(ap, int *) = nread;
continue;
/*
* Disgusting backwards compatibility hacks. XXX
*/
case '\0': /* compat */
return (EOF);
default: /* compat */
if (isupper(c))
flags |= LONG;
c = CT_INT;
base = 10;
break;
}
/*
* We have a conversion that requires input.
*/
if (fp->_r <= 0 && __srefill(fp))
goto input_failure;
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
while (isspace(*fp->_p)) {
nread++;
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
goto input_failure;
}
/*
* Note that there is at least one character in
* the buffer, so conversions that do not set NOSKIP
* ca no longer result in an input failure.
*/
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0)
width = 1;
#ifdef SCANF_WIDE_CHAR
if (flags & LONG) {
if ((flags & SUPPRESS) == 0)
wcp = va_arg(ap, wchar_t *);
else
wcp = NULL;
n = 0;
while (width != 0) {
if (n == MB_CUR_MAX) {
fp->_flags |= __SERR;
goto input_failure;
}
buf[n++] = *fp->_p;
fp->_p++;
fp->_r--;
bzero(&mbs, sizeof(mbs));
nconv = mbrtowc(wcp, buf, n, &mbs);
if (nconv == (size_t)-1) {
fp->_flags |= __SERR;
goto input_failure;
}
if (nconv == 0 && !(flags & SUPPRESS))
*wcp = L'\0';
if (nconv != (size_t)-2) {
nread += n;
width--;
if (!(flags & SUPPRESS))
wcp++;
n = 0;
}
if (fp->_r <= 0 && __srefill(fp)) {
if (n != 0) {
fp->_flags |= __SERR;
goto input_failure;
}
break;
}
}
if (!(flags & SUPPRESS))
nassigned++;
} else
#endif /* SCANF_WIDE_CHAR */
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((n = fp->_r) < width) {
sum += n;
width -= n;
fp->_p += n;
if (__srefill(fp)) {
if (sum == 0)
goto input_failure;
break;
}
} else {
sum += width;
fp->_r -= width;
fp->_p += width;
break;
}
}
nread += sum;
} else {
size_t r = fread((void *)va_arg(ap, char *), 1,
width, fp);
if (r == 0)
goto input_failure;
nread += r;
nassigned++;
}
break;
case CT_CCL:
/* scan a (nonempty) character class (sets NOSKIP) */
if (width == 0)
width = (size_t)~0; /* `infinity' */
#ifdef SCANF_WIDE_CHAR
/* take only those things in the class */
if (flags & LONG) {
wchar_t twc;
int nchars;
if ((flags & SUPPRESS) == 0)
wcp = va_arg(ap, wchar_t *);
else
/*
* __svfscanf - non-MT-safe version of __vfscanf
*/
int
__svfscanf(FILE* fp, const char* fmt0, va_list ap) {
const u_char* fmt = (const u_char*)fmt0;
int c; /* character from format, or conversion */
size_t width; /* field width, or 0 */
char* p; /* points into all kinds of strings */
int n; /* handy integer */
int flags; /* flags as defined above */
char* p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nconversions; /* number of conversions */
int nread; /* number of characters consumed from fp */
int base; /* base argument to conversion function */
char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric and mb conversions */
wchar_t* wcp; /* handy wide character pointer */
size_t nconv; /* length of multibyte sequence converted */
static const mbstate_t initial;
mbstate_t mbs;
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
ORIENT(fp, -1);
nassigned = 0;
nconversions = 0;
nread = 0;
for (;;) {
c = *fmt++;
if (c == 0) {
return (nassigned);
}
if (isspace(c)) {
while ((fp->_r > 0 || __srefill(fp) == 0) && isspace(*fp->_p)) {
nread++, fp->_r--, fp->_p++;
}
continue;
}
if (c != '%') {
goto literal;
}
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again:
c = *fmt++;
switch (c) {
case '%':
literal:
if (fp->_r <= 0 && __srefill(fp)) {
goto input_failure;
}
if (*fp->_p != c) {
goto match_failure;
}
fp->_r--, fp->_p++;
nread++;
continue;
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; /* not quite */
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;
/*
* Conversions.
*/
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; /* enable 0x prefixing */
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;
/* FALLTHROUGH */
case 's':
c = CT_STRING;
break;
case '[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case 'C':
flags |= LONG;
/* FALLTHROUGH */
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT; /* assumes sizeof(uintmax_t) */
flags |= UNSIGNED; /* >= sizeof(uintptr_t) */
base = 16;
break;
case 'n':
nconversions++;
if (flags & SUPPRESS) { /* ??? */
continue;
}
if (flags & SHORTSHORT) {
*va_arg(ap, char*) = nread;
} else if (flags & SHORT) {
*va_arg(ap, short*) = nread;
} else if (flags & LONG) {
*va_arg(ap, long*) = nread;
} else if (flags & LONGLONG) {
*va_arg(ap, long long*) = nread;
} else if (flags & INTMAXT) {
*va_arg(ap, intmax_t*) = nread;
} else if (flags & SIZET) {
*va_arg(ap, size_t*) = nread;
} else if (flags & PTRDIFFT) {
*va_arg(ap, ptrdiff_t*) = nread;
} else {
*va_arg(ap, int*) = nread;
}
continue;
default:
goto match_failure;
/*
* Disgusting backwards compatibility hack. XXX
*/
case '\0': /* compat */
return (EOF);
}
/*
* We have a conversion that requires input.
*/
if (fp->_r <= 0 && __srefill(fp)) {
goto input_failure;
}
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
while (isspace(*fp->_p)) {
nread++;
if (--fp->_r > 0) {
fp->_p++;
} else if (__srefill(fp)) {
goto input_failure;
}
}
/*
* Note that there is at least one character in
* the buffer, so conversions that do not set NOSKIP
* ca no longer result in an input failure.
*/
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0) {
width = 1;
}
if (flags & LONG) {
if ((flags & SUPPRESS) == 0) {
wcp = va_arg(ap, wchar_t*);
} else {
wcp = NULL;
}
n = 0;
while (width != 0) {
if (n == MB_CUR_MAX) {
fp->_flags |= __SERR;
goto input_failure;
}
buf[n++] = *fp->_p;
fp->_p++;
fp->_r--;
mbs = initial;
nconv = mbrtowc(wcp, buf, n, &mbs);
if (nconv == (size_t) - 1) {
fp->_flags |= __SERR;
goto input_failure;
}
if (nconv == 0 && !(flags & SUPPRESS)) {
*wcp = L'\0';
}
if (nconv != (size_t) - 2) {
nread += n;
width--;
if (!(flags & SUPPRESS)) {
wcp++;
}
n = 0;
}
if (fp->_r <= 0 && __srefill(fp)) {
if (n != 0) {
fp->_flags |= __SERR;
goto input_failure;
}
break;
}
}
if (!(flags & SUPPRESS)) {
nassigned++;
}
} else if (flags & SUPPRESS) {
/*
* vfscanf
*/
NA_EIDPROC
Int32
__svfscanf(SCANBUF* fp, NAWchar const* fmt0, va_list ap)
{
register NAWchar *fmt = (NAWchar *)fmt0;
register Int32 c; /* character from format, or conversion */
register UInt32 width; /* field width, or 0 */
register NAWchar *p; /* points into all kinds of strings */
register UInt32 n; /* handy integer */
register Int32 flags; /* flags as defined above */
register NAWchar *p0; /* saves original value of p when necessary */
Int32 nassigned; /* number of fields assigned */
Int32 nread; /* number of characters consumed from fp */
Int32 base; /* base argument to strtoq/strtouq */
ccfnT ccfn; /* conversion function (strtoq/strtouq) */
NAWchar ccltab[256]; /* character class table for %[...] */
NAWchar buf[BUF]; /* buffer for numeric conversions */
char sb_buf[BUF]; /* single byte buffer for numeric conversions */
/* `basefix' is used to avoid `if' tests in the integer scanner */
/* static */ short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
nassigned = 0;
nread = 0;
base = 0; /* XXX just to keep gcc happy */
ccfn = NULL;
for (;;) {
c = *fmt++;
if (c == 0)
return (nassigned);
#pragma nowarn(1506) // warning elimination
if (na_iswspace(c)) {
#pragma warn(1506) // warning elimination
for (;;) {
if (fp->_r <= 0 && __srefill(fp))
return (nassigned);
if (!na_iswspace(*fp->_p))
break;
nread++, fp->_r--, fp->_p++;
}
continue;
}
if (c != L'%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case L'%':
literal:
if (fp->_r <= 0 && __srefill(fp))
goto input_failure;
if (*fp->_p != c)
goto match_failure;
fp->_r--, fp->_p++;
nread++;
continue;
case L'*':
flags |= SUPPRESS;
goto again;
case L'L':
flags |= LONGDBL;
goto again;
case L'h':
flags |= SHORT;
goto again;
case L'l':
if (*fmt == L'l') {
fmt++;
flags |= QUAD;
} else {
flags |= LONG;
}
goto again;
case L'q':
flags |= QUAD;
goto again;
case L'0': case L'1': case L'2': case L'3': case L'4':
case L'5': case L'6': case L'7': case L'8': case L'9':
width = width * 10 + c - L'0';
goto again;
/*
* Conversions.
* Those marked `compat' are for 4.[123]BSD compatibility.
*
* (According to ANSI, E and X formats are supposed
* to the same as e and x. Sorry about that.)
*/
case L'D': /* compat */
flags |= LONG;
/* FALLTHROUGH */
case L'd':
c = CT_INT;
if (flags & QUAD)
ccfn = (ccfnT)na_wcstoll;
else
ccfn = (ccfnT)na_wcstol;
base = 10;
break;
case L'i':
c = CT_INT;
ccfn = (ccfnT)na_wcstol;
base = 0;
break;
case L'O': /* compat */
flags |= LONG;
/* FALLTHROUGH */
case L'o':
c = CT_INT;
ccfn = (ccfnT)na_wcstol;
base = 8;
break;
case L'u':
c = CT_INT;
ccfn = (ccfnT)na_wcstol;
base = 10;
break;
case L'X':
case L'x':
flags |= PFXOK; /* enable 0x prefixing */
c = CT_INT;
ccfn = (ccfnT)na_wcstol;
base = 16;
break;
#ifdef FLOATING_POINT
case L'E':
case L'G':
case L'e':
case L'f':
case L'g':
c = CT_FLOAT;
break;
#endif
case L's':
c = CT_STRING;
break;
case L'[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case L'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case L'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT;
ccfn = (ccfnT)na_wcstol;
base = 16;
break;
case L'n':
if (flags & SUPPRESS) /* ??? */
continue;
if (flags & SHORT)
#pragma nowarn(1506) // warning elimination
*va_arg(ap, short *) = nread;
#pragma warn(1506) // warning elimination
else if (flags & LONG)
*va_arg(ap, Lng32 *) = nread;
else
*va_arg(ap, Int32 *) = nread;
continue;
/*
* Disgusting backwards compatibility hacks. XXX
*/
case L'\0': /* compat */
//return (EOF);
return -1;
default: /* compat */
if ( L'A' <= c && c <= L'Z' )
flags |= LONG;
c = CT_INT;
ccfn = (ccfnT)na_wcstol;
base = 10;
break;
}
/*
* We have a conversion that requires input.
*/
if (fp->_r <= 0 && __srefill(fp))
goto input_failure;
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
while (na_iswspace(*fp->_p)) {
nread++;
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
goto input_failure;
}
/*
* Note that there is at least one character in
* the buffer, so conversions that do not set NOSKIP
* ca no longer result in an input failure.
*/
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0)
width = 1;
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((n = fp->_r) < width) {
sum += n;
width -= n;
fp->_p += n;
if (__srefill(fp)) {
if (sum == 0)
goto input_failure;
break;
}
} else {
sum += width;
fp->_r -= width;
fp->_p += width;
break;
}
}
nread += sum;
} else {
//size_t r = fread((void *)va_arg(ap, char *), 1,
// width, fp);
size_t r;
if ( fp->_r >= width ) {
na_wcsncpy((NAWchar*)va_arg(ap, NAWchar *), (NAWchar*)fp->_ptr, width);
r = width;
} else
r = 0;
if (r == 0)
goto input_failure;
nread += r;
nassigned++;
}
break;
case CT_CCL:
/* scan a (nonempty) character class (sets NOSKIP) */
if (width == 0)
width = ~0; /* `infinity' */
/* take only those things in the class */
if (flags & SUPPRESS) {
n = 0;
while (ccltab[*fp->_p]) {
n++, fp->_r--, fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp)) {
if (n == 0)
goto input_failure;
break;
}
}
if (n == 0)
goto match_failure;
} else {
p0 = p = va_arg(ap, NAWchar *);
while (ccltab[*fp->_p]) {
fp->_r--;
*p++ = *fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp)) {
if (p == p0)
goto input_failure;
break;
}
}
n = p - p0;
if (n == 0)
goto match_failure;
*p = 0;
nassigned++;
}
nread += n;
break;
case CT_STRING:
/* like CCL, but zero-length string OK, & no NOSKIP */
if (width == 0)
width = ~0;
if (flags & SUPPRESS) {
n = 0;
while (!na_iswspace(*fp->_p)) {
n++, fp->_r--, fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp))
break;
}
nread += n;
} else {
p0 = p = va_arg(ap, NAWchar *);
while (!na_iswspace(*fp->_p)) {
fp->_r--;
*p++ = *fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp))
break;
}
*p = 0;
nread += p - p0;
nassigned++;
}
continue;
case CT_INT:
/* scan an integer as if by strtoq/strtouq */
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
/* size_t is unsigned, hence this optimisation */
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = *fp->_p;
/*
* Switch on the character; `goto ok'
* if we accept it as a part of number.
*/
switch (c) {
/*
* The digit 0 is always legal, but is
* special. For %i conversions, if no
* digits (zero or nonzero) have been
* scanned (only signs), we will have
* base==0. In that case, we should set
* it to 8 and enable 0x prefixing.
* Also, if we have not scanned zero digits
* before this, do not turn off prefixing
* (someone else will turn it off if we
* have scanned any nonzero digits).
*/
case L'0':
if (base == 0) {
base = 8;
flags |= PFXOK;
}
if (flags & NZDIGITS)
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
else
flags &= ~(SIGNOK|PFXOK|NDIGITS);
goto ok;
/* 1 through 7 always legal */
case L'1': case L'2': case L'3':
case L'4': case L'5': case L'6': case L'7':
base = basefix[base];
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* digits 8 and 9 ok iff decimal or hex */
case L'8': case L'9':
base = basefix[base];
if (base <= 8)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* letters ok iff hex */
case L'A': case L'B': case L'C':
case L'D': case L'E': case L'F':
case L'a': case L'b': case L'c':
case L'd': case L'e': case L'f':
/* no need to fix base here */
if (base <= 10)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* sign ok only as first character */
case L'+': case L'-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto ok;
}
break;
/* x ok iff flag still set & 2nd char */
case L'x': case L'X':
if (flags & PFXOK && p == buf + 1) {
base = 16; /* if %i */
flags &= ~PFXOK;
goto ok;
}
break;
}
/*
* If we got here, c is not a legal character
* for a number. Stop accumulating digits.
*/
break;
ok:
/*
* c is legal: store it and look at the next.
*/
#pragma nowarn(1506) // warning elimination
*p++ = c;
#pragma warn(1506) // warning elimination
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
break; /* EOF */
}
/*
* If we had only a sign, it is no good; push
* back the sign. If the number ends in `x',
* it was [sign] '0' 'x', so push back the x
* and treat it as [sign] '0'.
*/
if (flags & NDIGITS) {
if (p > buf)
(void) ungetc(*(NAWchar *)--p, fp);
goto match_failure;
}
c = ((NAWchar *)p)[-1];
if (c == L'x' || c == L'X') {
--p;
#pragma nowarn(1506) // warning elimination
(void) ungetc(c, fp);
#pragma warn(1506) // warning elimination
}
if ((flags & SUPPRESS) == 0) {
u_quad_t res = NULL;
*p = 0;
if ( ccfn )
res = (*ccfn)(buf); // only 10 based
//res = (*ccfn)(buf);
if (flags & POINTER)
*va_arg(ap, void **) =
(void *)(Lng32)res;
else if (flags & QUAD)
#pragma nowarn(1506) // warning elimination
*va_arg(ap, quad_t *) = res;
#pragma warn(1506) // warning elimination
else if (flags & LONG)
#pragma nowarn(1506) // warning elimination
*va_arg(ap, Lng32 *) = (Lng32) res;
#pragma warn(1506) // warning elimination
else if (flags & SHORT)
*va_arg(ap, Int16 *) = (Int16) res;
else
#pragma nowarn(1506) // warning elimination
*va_arg(ap, Int32 *) = (Int32) res;
#pragma warn(1506) // warning elimination
nassigned++;
}
nread += p - buf;
break;
#ifdef FLOATING_POINT
case CT_FLOAT:
/* scan a floating point number as if by strtod */
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
/* size_t is unsigned, hence this optimisation */
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
char* q = sb_buf;
for (p = buf; width; width--) {
c = *fp->_p;
/*
* This code mimicks the integer conversion
* code, but is much simpler.
*/
switch (c) {
case L'0': case L'1': case L'2': case L'3':
case L'4': case L'5': case L'6': case L'7':
case L'8': case L'9':
flags &= ~(SIGNOK | NDIGITS);
goto fok;
case L'+': case L'-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto fok;
}
break;
case L'.':
if (flags & DPTOK) {
flags &= ~(SIGNOK | DPTOK);
goto fok;
}
break;
case L'e': case L'E':
/* no exponent without some digits */
if ((flags&(NDIGITS|EXPOK)) == EXPOK) {
flags =
(flags & ~(EXPOK|DPTOK)) |
SIGNOK | NDIGITS;
goto fok;
}
break;
}
break;
fok:
#pragma nowarn(1506) // warning elimination
*p++ = c;
*q++ = (char)c;
#pragma warn(1506) // warning elimination
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
break; /* EOF */
}
/*
* If no digits, might be missing exponent digits
* (just give back the exponent) or might be missing
* regular digits, but had sign and/or decimal point.
*/
if (flags & NDIGITS) {
if (flags & EXPOK) {
/* no digits at all */
while (p > buf)
ungetc(*(NAWchar *)--p, fp);
goto match_failure;
}
/* just a bad exponent (e and maybe sign) */
c = *(NAWchar *)--p;
if (c != L'e' && c != L'E') {
#pragma nowarn(1506) // warning elimination
(void) ungetc(c, fp);/* sign */
#pragma warn(1506) // warning elimination
c = *(NAWchar *)--p;
}
#pragma nowarn(1506) // warning elimination
(void) ungetc(c, fp);
#pragma warn(1506) // warning elimination
}
if ((flags & SUPPRESS) == 0) {
double res;
*p = 0;
//res = na_wcstod(buf, (NAWchar **) NULL);
res = strtod(sb_buf, NULL);
if (flags & LONGDBL)
#pragma nowarn(1255) // warning elimination
*va_arg(ap, long double *) = res;
#pragma warn(1255) // warning elimination
else if (flags & LONG)
*va_arg(ap, double *) = res;
else
*va_arg(ap, float *) = (float) res;
nassigned++;
}
nread += p - buf;
break;
#endif /* FLOATING_POINT */
}
/*
* vfscanf
*/
int
VFSCANF(FILE *fp, const char *fmt0, __va_list ap)
{
u_char *fmt = (u_char *)fmt0;
int c; /* character from format, or conversion */
size_t width; /* field width, or 0 */
char *p; /* points into all kinds of strings */
int n; /* handy integer */
int flags; /* flags as defined above */
char *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nread; /* number of characters consumed from fp */
int base; /* base argument to strtoimax/strtouimax */
char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric conversions */
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
FLOCKFILE(fp);
_SET_ORIENTATION(fp, -1);
nassigned = 0;
nread = 0;
base = 0; /* XXX just to keep gcc happy */
for (;;) {
c = *fmt++;
if (c == 0) {
FUNLOCKFILE(fp);
return (nassigned);
}
if (isspace(c)) {
while ((fp->_r > 0 || __srefill(fp) == 0) &&
isspace(*fp->_p))
nread++, fp->_r--, fp->_p++;
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case '%':
literal:
if (fp->_r <= 0 && __srefill(fp))
goto input_failure;
if (*fp->_p != c)
goto match_failure;
fp->_r--, fp->_p++;
nread++;
continue;
case '*':
flags |= SUPPRESS;
goto again;
case 'j':
flags |= MAXINT;
goto again;
case 'L':
flags |=
(*fmt == 'd') ? LLONG :
(*fmt == 'i') ? LLONG :
(*fmt == 'o') ? LLONG :
(*fmt == 'u') ? LLONG :
(*fmt == 'x') ? LLONG :
LONGDBL;
goto again;
case 'h':
if (*fmt == 'h') {
fmt++;
flags |= SHORTSHORT;
} else {
flags |= SHORT;
}
goto again;
case 'l':
if (*fmt == 'l') {
fmt++;
flags |= LLONG;
} else {
flags |= LONG;
}
goto again;
case 'q':
flags |= LLONG; /* deprecated */
goto again;
case 't':
flags |= PTRINT;
goto again;
case 'z':
flags |= SIZEINT;
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;
/*
* Conversions.
* Those marked `compat' are for 4.[123]BSD compatibility.
*
* (According to ANSI, E and X formats are supposed
* to the same as e and x. Sorry about that.)
*/
case 'D': /* compat */
flags |= LONG;
/* FALLTHROUGH */
case 'd':
c = CT_INT;
base = 10;
break;
case 'i':
c = CT_INT;
base = 0;
break;
case 'O': /* compat */
flags |= LONG;
/* FALLTHROUGH */
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; /* enable 0x prefixing */
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
#ifdef FLOATING_POINT
case 'E':
case 'G':
case 'e':
case 'f':
case 'g':
c = CT_FLOAT;
break;
#endif
case 's':
c = CT_STRING;
break;
case '[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT;
flags |= UNSIGNED;
base = 16;
break;
case 'n':
if (flags & SUPPRESS)
continue;
if (flags & SHORTSHORT)
*va_arg(ap, __signed char *) = nread;
else if (flags & SHORT)
*va_arg(ap, short *) = nread;
else if (flags & LONG)
*va_arg(ap, long *) = nread;
else if (flags & SIZEINT)
*va_arg(ap, ssize_t *) = nread;
else if (flags & PTRINT)
*va_arg(ap, ptrdiff_t *) = nread;
else if (flags & LLONG)
*va_arg(ap, long long *) = nread;
else if (flags & MAXINT)
*va_arg(ap, intmax_t *) = nread;
else
*va_arg(ap, int *) = nread;
continue;
/*
* Disgusting backwards compatibility hacks. XXX
*/
case '\0': /* compat */
FUNLOCKFILE(fp);
return (EOF);
default: /* compat */
if (isupper(c))
flags |= LONG;
c = CT_INT;
base = 10;
break;
}
/*
* We have a conversion that requires input.
*/
if (fp->_r <= 0 && __srefill(fp))
goto input_failure;
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
while (isspace(*fp->_p)) {
nread++;
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
goto input_failure;
}
/*
* Note that there is at least one character in
* the buffer, so conversions that do not set NOSKIP
* ca no longer result in an input failure.
*/
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0)
width = 1;
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((n = fp->_r) < (int)width) {
sum += n;
width -= n;
fp->_p += n;
if (__srefill(fp)) {
if (sum == 0)
goto input_failure;
break;
}
} else {
sum += width;
fp->_r -= width;
fp->_p += width;
break;
}
}
nread += sum;
} else {
size_t r = fread((void *)va_arg(ap, char *), 1,
width, fp);
if (r == 0)
goto input_failure;
nread += r;
nassigned++;
}
break;
case CT_CCL:
/* scan a (nonempty) character class (sets NOSKIP) */
if (width == 0)
width = (size_t)~0; /* `infinity' */
/* take only those things in the class */
if (flags & SUPPRESS) {
n = 0;
while (ccltab[*fp->_p]) {
n++, fp->_r--, fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp)) {
if (n == 0)
goto input_failure;
break;
}
}
if (n == 0)
goto match_failure;
} else {
p0 = p = va_arg(ap, char *);
while (ccltab[*fp->_p]) {
fp->_r--;
*p++ = *fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp)) {
if (p == p0)
goto input_failure;
break;
}
}
n = p - p0;
if (n == 0)
goto match_failure;
*p = '\0';
nassigned++;
}
nread += n;
break;
case CT_STRING:
/* like CCL, but zero-length string OK, & no NOSKIP */
if (width == 0)
width = (size_t)~0;
if (flags & SUPPRESS) {
n = 0;
while (!isspace(*fp->_p)) {
n++, fp->_r--, fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp))
break;
}
nread += n;
} else {
p0 = p = va_arg(ap, char *);
while (!isspace(*fp->_p)) {
fp->_r--;
*p++ = *fp->_p++;
if (--width == 0)
break;
if (fp->_r <= 0 && __srefill(fp))
break;
}
*p = '\0';
nread += p - p0;
nassigned++;
}
continue;
case CT_INT:
/* scan an integer as if by strtoimax/strtoumax */
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
/* size_t is unsigned, hence this optimisation */
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = *fp->_p;
/*
* Switch on the character; `goto ok'
* if we accept it as a part of number.
*/
switch (c) {
/*
* The digit 0 is always legal, but is
* special. For %i conversions, if no
* digits (zero or nonzero) have been
* scanned (only signs), we will have
* base==0. In that case, we should set
* it to 8 and enable 0x prefixing.
* Also, if we have not scanned zero digits
* before this, do not turn off prefixing
* (someone else will turn it off if we
* have scanned any nonzero digits).
*/
case '0':
if (base == 0) {
base = 8;
flags |= PFXOK;
}
if (flags & NZDIGITS)
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
else
flags &= ~(SIGNOK|PFXOK|NDIGITS);
goto ok;
/* 1 through 7 always legal */
case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
base = basefix[base];
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* digits 8 and 9 ok iff decimal or hex */
case '8': case '9':
base = basefix[base];
if (base <= 8)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* letters ok iff hex */
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
/* no need to fix base here */
if (base <= 10)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* sign ok only as first character */
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
flags |= HAVESIGN;
goto ok;
}
break;
/*
* x ok iff flag still set and 2nd char (or
* 3rd char if we have a sign).
*/
case 'x': case 'X':
if ((flags & PFXOK) && p ==
buf + 1 + !!(flags & HAVESIGN)) {
base = 16; /* if %i */
flags &= ~PFXOK;
goto ok;
}
break;
}
/*
* If we got here, c is not a legal character
* for a number. Stop accumulating digits.
*/
break;
ok:
/*
* c is legal: store it and look at the next.
*/
*p++ = c;
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
break; /* EOF */
}
/*
* If we had only a sign, it is no good; push
* back the sign. If the number ends in `x',
* it was [sign] '0' 'x', so push back the x
* and treat it as [sign] '0'.
*/
if (flags & NDIGITS) {
if (p > buf)
(void) ungetc(*(u_char *)--p, fp);
goto match_failure;
}
c = ((u_char *)p)[-1];
if (c == 'x' || c == 'X') {
--p;
(void) ungetc(c, fp);
}
if ((flags & SUPPRESS) == 0) {
uintmax_t res;
*p = '\0';
if (flags & UNSIGNED)
res = strtoumax(buf, NULL, base);
else
res = strtoimax(buf, NULL, base);
if (flags & POINTER)
*va_arg(ap, void **) =
(void *)(uintptr_t)res;
else if (flags & MAXINT)
*va_arg(ap, intmax_t *) = res;
else if (flags & LLONG)
*va_arg(ap, long long *) = res;
else if (flags & SIZEINT)
*va_arg(ap, ssize_t *) = res;
else if (flags & PTRINT)
*va_arg(ap, ptrdiff_t *) = res;
else if (flags & LONG)
*va_arg(ap, long *) = res;
else if (flags & SHORT)
*va_arg(ap, short *) = res;
else if (flags & SHORTSHORT)
*va_arg(ap, __signed char *) = res;
else
*va_arg(ap, int *) = res;
nassigned++;
}
nread += p - buf;
break;
#ifdef FLOATING_POINT
case CT_FLOAT:
/* scan a floating point number as if by strtod */
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
/* size_t is unsigned, hence this optimisation */
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
for (p = buf; width; width--) {
c = *fp->_p;
/*
* This code mimicks the integer conversion
* code, but is much simpler.
*/
switch (c) {
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
case '8': case '9':
flags &= ~(SIGNOK | NDIGITS);
goto fok;
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto fok;
}
break;
case '.':
if (flags & DPTOK) {
flags &= ~(SIGNOK | DPTOK);
goto fok;
}
break;
case 'e': case 'E':
/* no exponent without some digits */
if ((flags&(NDIGITS|EXPOK)) == EXPOK) {
flags =
(flags & ~(EXPOK|DPTOK)) |
SIGNOK | NDIGITS;
goto fok;
}
break;
}
break;
fok:
*p++ = c;
if (--fp->_r > 0)
fp->_p++;
else if (__srefill(fp))
break; /* EOF */
}
/*
* If no digits, might be missing exponent digits
* (just give back the exponent) or might be missing
* regular digits, but had sign and/or decimal point.
*/
if (flags & NDIGITS) {
if (flags & EXPOK) {
/* no digits at all */
while (p > buf)
ungetc(*(u_char *)--p, fp);
goto match_failure;
}
/* just a bad exponent (e and maybe sign) */
c = *(u_char *)--p;
if (c != 'e' && c != 'E') {
(void) ungetc(c, fp);/* sign */
c = *(u_char *)--p;
}
(void) ungetc(c, fp);
}
if ((flags & SUPPRESS) == 0) {
double res;
*p = '\0';
res = strtod(buf, (char **) NULL);
if (flags & LONGDBL)
*va_arg(ap, long double *) = res;
else if (flags & LONG)
*va_arg(ap, double *) = res;
else
*va_arg(ap, float *) = res;
nassigned++;
}
nread += p - buf;
break;
#endif /* FLOATING_POINT */
}
}
input_failure:
if (nassigned == 0)
nassigned = -1;
match_failure:
FUNLOCKFILE(fp);
return (nassigned);
}
int streambuf::vscan(char const *fmt0,
_G_va_list ap,
ios *stream /* = NULL */)
{
register const u_char *fmt = (const u_char *)fmt0;
register int c; /* character from format, or conversion */
register size_t width; /* field width, or 0 */
register char *p; /* points into all kinds of strings */
register int n; /* handy integer */
register int flags; /* flags as defined above */
register char *p0; /* saves original value of p when necessary */
int nassigned; /* number of fields assigned */
int nread; /* number of characters consumed from fp */
// Assignments to base and ccfn are just to suppress warnings from gcc.
int base = 0; /* base argument to strtol/strtoul */
typedef u_long (*strtoulfn)(const char*, char**, int);
strtoulfn ccfn = 0;
// conversion function (strtol/strtoul)
char ccltab[256]; /* character class table for %[...] */
char buf[BUF]; /* buffer for numeric conversions */
int seen_eof = 0;
/* `basefix' is used to avoid `if' tests in the integer scanner */
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
nassigned = 0;
nread = 0;
for (;;) {
c = *fmt++;
if (c == 0)
goto done;
if (isspace(c)) {
for (;;) {
c = sbumpc();
if (c == EOF)
goto eof_failure;
if (!isspace(c)) {
sputbackc(c);
break;
}
nread++;
}
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
/*
* switch on the format. continue if done;
* break once format type is derived.
*/
again: c = *fmt++;
switch (c) {
case '%':
literal:
n = sbumpc();
if (n == EOF)
goto eof_failure;
if (n != c) {
sputbackc(n);
goto match_failure;
}
nread++;
continue;
case '*':
flags |= SUPPRESS;
goto again;
case 'l':
flags |= LONG;
goto again;
case 'L':
flags |= LONGDBL;
goto again;
case 'h':
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;
/*
* Conversions.
* Those marked `compat' are for 4.[123]BSD compatibility.
*
* (According to ANSI, E and X formats are supposed
* to the same as e and x. Sorry about that.)
*/
case 'D': /* compat */
flags |= LONG;
/* FALLTHROUGH */
case 'd':
c = CT_INT;
ccfn = (strtoulfn)strtol;
base = 10;
break;
case 'i':
c = CT_INT;
ccfn = (strtoulfn)strtol;
base = 0;
break;
case 'O': /* compat */
flags |= LONG;
/* FALLTHROUGH */
case 'o':
c = CT_INT;
ccfn = strtoul;
base = 8;
break;
case 'u':
c = CT_INT;
ccfn = strtoul;
base = 10;
break;
case 'X':
case 'x':
flags |= PFXOK; /* enable 0x prefixing */
c = CT_INT;
ccfn = strtoul;
base = 16;
break;
#ifdef FLOATING_POINT
case 'E': case 'F':
case 'e': case 'f': case 'g':
c = CT_FLOAT;
break;
#endif
case 's':
c = CT_STRING;
break;
case '[':
fmt = __sccl(ccltab, fmt);
flags |= NOSKIP;
c = CT_CCL;
break;
case 'c':
flags |= NOSKIP;
c = CT_CHAR;
break;
case 'p': /* pointer format is like hex */
flags |= POINTER | PFXOK;
c = CT_INT;
ccfn = strtoul;
base = 16;
break;
case 'n':
if (flags & SUPPRESS) /* ??? */
continue;
if (flags & SHORT)
*va_arg(ap, short *) = nread;
else if (flags & LONG)
*va_arg(ap, long *) = nread;
else
*va_arg(ap, int *) = nread;
continue;
/*
* Disgusting backwards compatibility hacks. XXX
*/
case '\0': /* compat */
nassigned = EOF;
goto done;
default: /* compat */
if (isupper(c))
flags |= LONG;
c = CT_INT;
ccfn = (strtoulfn)strtol;
base = 10;
break;
}
/*
* We have a conversion that requires input.
*/
if (sgetc() == EOF)
goto eof_failure;
/*
* Consume leading white space, except for formats
* that suppress this.
*/
if ((flags & NOSKIP) == 0) {
n = (unsigned char)*_gptr;
while (isspace(n)) {
_gptr++;
nread++;
n = sgetc();
if (n == EOF)
goto eof_failure;
}
// Note that there is at least one character in
// the buffer, so conversions that do not set NOSKIP
// can no longer result in an input failure.
}
/*
* Do the conversion.
*/
switch (c) {
case CT_CHAR:
/* scan arbitrary characters (sets NOSKIP) */
if (width == 0) // FIXME!
width = 1;
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((n = _egptr - _gptr) < (int)width) {
sum += n;
width -= n;
_gptr += n;
if (underflow() == EOF)
if (sum == 0)
goto eof_failure;
else {
seen_eof++;
break;
}
} else {
sum += width;
_gptr += width;
break;
}
}
nread += sum;
} else {
size_t r = sgetn((char*)va_arg(ap, char*),
width);
if (r != width)
goto eof_failure;
nread += r;
nassigned++;
}
break;
case CT_CCL:
/* scan a (nonempty) character class (sets NOSKIP) */
if (width == 0)
width = ~0; /* `infinity' */
/* take only those things in the class */
if (flags & SUPPRESS) {
n = 0;
while (ccltab[(unsigned char)*_gptr]) {
n++, _gptr++;
if (--width == 0)
break;
if (sgetc() == EOF) {
if (n == 0)
goto eof_failure;
seen_eof++;
break;
}
}
if (n == 0)
goto match_failure;
} else {
p0 = p = va_arg(ap, char *);
while (ccltab[(unsigned char)*_gptr]) {
*p++ = *_gptr++;
if (--width == 0)
break;
if (sgetc() == EOF) {
if (p == p0)
goto eof_failure;
seen_eof++;
break;
}
}
n = p - p0;
if (n == 0)
goto match_failure;
*p = 0;
nassigned++;
}
nread += n;
break;
case CT_STRING:
/* like CCL, but zero-length string OK, & no NOSKIP */
if (width == 0)
width = ~0;
if (flags & SUPPRESS) {
n = 0;
while (!isspace((unsigned char)*_gptr)) {
n++, _gptr++;
if (--width == 0)
break;
if (sgetc() == EOF) {
seen_eof++;
break;
}
}
nread += n;
} else {
p0 = p = va_arg(ap, char *);
while (!isspace((unsigned char)*_gptr)) {
*p++ = *_gptr++;
if (--width == 0)
break;
if (sgetc() == EOF) {
seen_eof++;
break;
}
}
*p = 0;
nread += p - p0;
nassigned++;
}
continue;
case CT_INT:
/* scan an integer as if by strtol/strtoul */
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = (unsigned char)*_gptr;
/*
* Switch on the character; `goto ok'
* if we accept it as a part of number.
*/
switch (c) {
/*
* The digit 0 is always legal, but is
* special. For %i conversions, if no
* digits (zero or nonzero) have been
* scanned (only signs), we will have
* base==0. In that case, we should set
* it to 8 and enable 0x prefixing.
* Also, if we have not scanned zero digits
* before this, do not turn off prefixing
* (someone else will turn it off if we
* have scanned any nonzero digits).
*/
case '0':
if (base == 0) {
base = 8;
flags |= PFXOK;
}
if (flags & NZDIGITS)
flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
else
flags &= ~(SIGNOK|PFXOK|NDIGITS);
goto ok;
/* 1 through 7 always legal */
case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
base = basefix[base];
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* digits 8 and 9 ok iff decimal or hex */
case '8': case '9':
base = basefix[base];
if (base <= 8)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* letters ok iff hex */
case 'A': case 'B': case 'C':
case 'D': case 'E': case 'F':
case 'a': case 'b': case 'c':
case 'd': case 'e': case 'f':
/* no need to fix base here */
if (base <= 10)
break; /* not legal here */
flags &= ~(SIGNOK | PFXOK | NDIGITS);
goto ok;
/* sign ok only as first character */
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto ok;
}
break;
/* x ok iff flag still set & 2nd char */
case 'x': case 'X':
if (flags & PFXOK && p == buf + 1) {
base = 16; /* if %i */
flags &= ~PFXOK;
goto ok;
}
break;
}
/*
* If we got here, c is not a legal character
* for a number. Stop accumulating digits.
*/
break;
ok:
/*
* c is legal: store it and look at the next.
*/
*p++ = c;
_gptr++;
if (sgetc() == EOF) {
seen_eof++;
break; /* EOF */
}
}
/*
* If we had only a sign, it is no good; push
* back the sign. If the number ends in `x',
* it was [sign] '0' 'x', so push back the x
* and treat it as [sign] '0'.
*/
if (flags & NDIGITS) {
if (p > buf)
(void) sputbackc(*(u_char *)--p);
goto match_failure;
}
c = ((u_char *)p)[-1];
if (c == 'x' || c == 'X') {
--p;
(void) sputbackc(c);
}
if ((flags & SUPPRESS) == 0) {
u_long res;
*p = 0;
res = (*ccfn)(buf, (char **)NULL, base);
if (flags & POINTER)
*va_arg(ap, void **) = (void *)res;
else if (flags & SHORT)
*va_arg(ap, short *) = res;
else if (flags & LONG)
*va_arg(ap, long *) = res;
else
*va_arg(ap, int *) = res;
nassigned++;
}
nread += p - buf;
break;
#ifdef FLOATING_POINT
case CT_FLOAT:
/* scan a floating point number as if by strtod */
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
for (p = buf; width; width--) {
c = (unsigned char)*_gptr;
/*
* This code mimicks the integer conversion
* code, but is much simpler.
*/
switch (c) {
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
case '8': case '9':
flags &= ~(SIGNOK | NDIGITS);
goto fok;
case '+': case '-':
if (flags & SIGNOK) {
flags &= ~SIGNOK;
goto fok;
}
break;
case '.':
if (flags & DPTOK) {
flags &= ~(SIGNOK | DPTOK);
goto fok;
}
break;
case 'e': case 'E':
/* no exponent without some digits */
if ((flags&(NDIGITS|EXPOK)) == EXPOK) {
flags =
(flags & ~(EXPOK|DPTOK)) |
SIGNOK | NDIGITS;
goto fok;
}
break;
}
break;
fok:
*p++ = c;
_gptr++;
if (sgetc() == EOF) {
seen_eof++;
break; /* EOF */
}
}
/*
* If no digits, might be missing exponent digits
* (just give back the exponent) or might be missing
* regular digits, but had sign and/or decimal point.
*/
if (flags & NDIGITS) {
if (flags & EXPOK) {
/* no digits at all */
while (p > buf)
sputbackc(*(u_char *)--p);
goto match_failure;
}
/* just a bad exponent (e and maybe sign) */
c = *(u_char *)--p;
if (c != 'e' && c != 'E') {
(void)sputbackc(c);/* sign */
c = *(u_char *)--p;
}
(void) sputbackc(c);
}
if ((flags & SUPPRESS) == 0) {
double res;
*p = 0;
#ifdef USE_DTOA
res = strtod(buf, NULL);
#else
res = atof(buf);
#endif
if (flags & LONG)
*va_arg(ap, double *) = res;
else
*va_arg(ap, float *) = res;
nassigned++;
}
nread += p - buf;
break;
#endif /* FLOATING_POINT */
}
}
eof_failure:
seen_eof++;
input_failure:
if (nassigned == 0)
nassigned = -1;
match_failure:
if (stream)
stream->set(ios::failbit);
done:
if (stream && seen_eof)
stream->set(ios::eofbit);
return (nassigned);
}
