#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "%W% (Berkeley) %G%";
#endif
#include <libioP.h>
#include <ctype.h>
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#ifndef NO_FLOATING_POINT
#define FLOATING_POINT
#endif
#ifdef FLOATING_POINT
#include "floatio.h"
#define BUF (MAXEXP+MAXFRACT+3)
#else
#define BUF 40
#endif
#define LONG 0x01
#define LONGDBL 0x02
#define SHORT 0x04
#define SUPPRESS 0x08
#define POINTER 0x10
#define NOSKIP 0x20
#define WIDTH 0x40
#define SIGNOK 0x40
#define NDIGITS 0x80
#define DPTOK 0x100
#define EXPOK 0x200
#define PFXOK 0x100
#define NZDIGITS 0x200
#define CT_CHAR 0
#define CT_CCL 1
#define CT_STRING 2
#define CT_INT 3
#define CT_FLOAT 4
#define u_char unsigned char
#define u_long unsigned long
#ifdef __cplusplus
extern "C" {
#endif
extern u_long strtoul __P((const char*, char**, int));
extern long strtol __P((const char*, char**, int));
static const u_char *__sccl __P((char *tab, const u_char *fmt));
#ifndef _IO_USE_DTOA
extern double atof();
#endif
#ifdef __cplusplus
}
#endif
int
_IO_vfscanf (fp, fmt0, ap, errp)
_IO_FILE *fp;
char const *fmt0;
_IO_va_list ap;
int *errp;
{
register const u_char *fmt = (const u_char *)fmt0;
register int c;
register _IO_ssize_t width;
register char *p;
register int n;
register int flags = 0;
register char *p0;
int nassigned;
int nread;
int base = 0;
typedef u_long (*strtoulfn) __P((const char*, char**, int));
strtoulfn ccfn = 0;
char ccltab[256];
char buf[BUF];
int seen_eof = 0;
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 = _IO_getc(fp);
if (c == EOF) {
seen_eof++;
break;
}
if (!isspace(c)) {
_IO_ungetc (c, fp);
break;
}
nread++;
}
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
again: c = *fmt++;
switch (c) {
case '%':
literal:
n = _IO_getc(fp);
if (n == EOF)
goto eof_failure;
if (n != c) {
_IO_ungetc (n, fp);
goto match_failure;
}
nread++;
continue;
case '*':
if (flags) goto control_failure;
flags = SUPPRESS;
goto again;
case 'l':
if (flags & ~(SUPPRESS | WIDTH)) goto control_failure;
flags |= LONG;
goto again;
case 'L':
if (flags & ~(SUPPRESS | WIDTH)) goto control_failure;
flags |= LONGDBL;
goto again;
case 'h':
if (flags & ~(SUPPRESS | WIDTH)) goto control_failure;
flags |= SHORT;
goto again;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
if (flags & ~(SUPPRESS | WIDTH)) goto control_failure;
flags |= WIDTH;
width = width * 10 + c - '0';
goto again;
case 'D':
flags |= LONG;
case 'd':
c = CT_INT;
ccfn = (strtoulfn)strtol;
base = 10;
break;
case 'i':
c = CT_INT;
ccfn = (strtoulfn)strtol;
base = 0;
break;
case 'O':
flags |= LONG;
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;
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':
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;
case '\0':
nassigned = EOF;
goto done;
default:
if (isupper(c))
flags |= LONG;
c = CT_INT;
ccfn = (strtoulfn)strtol;
base = 10;
break;
}
if (_IO_peekc(fp) == EOF)
goto eof_failure;
if ((flags & NOSKIP) == 0) {
n = (unsigned char)*fp->_IO_read_ptr;
while (isspace(n)) {
fp->_IO_read_ptr++;
nread++;
n = _IO_peekc(fp);
if (n == EOF)
goto eof_failure;
}
}
switch (c) {
case CT_CHAR:
if (width == 0)
width = 1;
if (flags & SUPPRESS) {
_IO_size_t sum = 0;
for (;;) {
n = fp->_IO_read_end - fp->_IO_read_ptr;
if (n < (int)width) {
sum += n;
width -= n;
fp->_IO_read_ptr += n;
if (__underflow(fp) == EOF)
if (sum == 0)
goto eof_failure;
else {
seen_eof++;
break;
}
} else {
sum += width;
fp->_IO_read_ptr += width;
break;
}
}
nread += sum;
} else {
_IO_size_t r =
_IO_XSGETN (fp, (char*)va_arg(ap, char*), width);
if (r != width)
goto eof_failure;
nread += r;
nassigned++;
}
break;
case CT_CCL:
if (width == 0)
width = ~0;
if (flags & SUPPRESS) {
n = 0;
while (ccltab[(unsigned char)*fp->_IO_read_ptr]) {
n++, fp->_IO_read_ptr++;
if (--width == 0)
break;
if (_IO_peekc(fp) == 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)*fp->_IO_read_ptr]) {
*p++ = *fp->_IO_read_ptr++;
if (--width == 0)
break;
if (_IO_peekc(fp) == 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:
if (width == 0)
width = ~0;
if (flags & SUPPRESS) {
n = 0;
while (!isspace((unsigned char)*fp->_IO_read_ptr)) {
n++, fp->_IO_read_ptr++;
if (--width == 0)
break;
if (_IO_peekc(fp) == EOF) {
seen_eof++;
break;
}
}
nread += n;
} else {
p0 = p = va_arg(ap, char *);
while (!isspace((unsigned char)*fp->_IO_read_ptr)) {
*p++ = *fp->_IO_read_ptr++;
if (--width == 0)
break;
if (_IO_peekc(fp) == EOF) {
seen_eof++;
break;
}
}
*p = 0;
nread += p - p0;
nassigned++;
}
continue;
case CT_INT:
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = (unsigned char)*fp->_IO_read_ptr;
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;
goto ok;
}
break;
case 'x': case 'X':
if (flags & PFXOK && p == buf + 1) {
base = 16;
flags &= ~PFXOK;
goto ok;
}
break;
}
break;
ok:
*p++ = c;
fp->_IO_read_ptr++;
if (_IO_peekc(fp) == EOF) {
seen_eof++;
break;
}
}
if (flags & NDIGITS) {
if (p > buf)
(void) _IO_ungetc(*(u_char *)--p, fp);
goto match_failure;
}
c = ((u_char *)p)[-1];
if (c == 'x' || c == 'X') {
--p;
(void) _IO_ungetc (c, fp);
}
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:
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
for (p = buf; width; width--) {
c = (unsigned char)*fp->_IO_read_ptr;
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':
if ((flags&(NDIGITS|EXPOK)) == EXPOK) {
flags =
(flags & ~(EXPOK|DPTOK)) |
SIGNOK | NDIGITS;
goto fok;
}
break;
}
break;
fok:
*p++ = c;
fp->_IO_read_ptr++;
if (_IO_peekc(fp) == EOF) {
seen_eof++;
break;
}
}
if (flags & NDIGITS) {
if (flags & EXPOK) {
while (p > buf)
_IO_ungetc (*(u_char *)--p, fp);
goto match_failure;
}
c = *(u_char *)--p;
if (c != 'e' && c != 'E') {
(void) _IO_ungetc (c, fp);
c = *(u_char *)--p;
}
(void) _IO_ungetc (c, fp);
}
if ((flags & SUPPRESS) == 0) {
double res;
*p = 0;
#ifdef _IO_USE_DTOA
res = _IO_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
}
}
eof_failure:
seen_eof++;
input_failure:
if (nassigned == 0)
nassigned = -1;
control_failure:
match_failure:
if (errp)
*errp |= 2;
done:
if (errp && seen_eof)
*errp |= 1;
return (nassigned);
}
static const u_char *
__sccl (tab, fmt)
char *tab;
const u_char *fmt;
{
register int c, n, v;
c = *fmt++;
if (c == '^') {
v = 1;
c = *fmt++;
} else
v = 0;
for (n = 0; n < 256; n++)
tab[n] = v;
if (c == 0)
return (fmt - 1);
v = 1 - v;
for (;;) {
tab[c] = v;
doswitch:
n = *fmt++;
switch (n) {
case 0:
return (fmt - 1);
case '-':
n = *fmt;
if (n == ']' || n < c) {
c = '-';
break;
}
fmt++;
do {
tab[++c] = v;
} while (c < n);
#if 1
goto doswitch;
#else
c = *fmt++;
if (c == 0)
return (fmt - 1);
if (c == ']')
return (fmt);
#endif
break;
case ']':
return (fmt);
default:
c = n;
break;
}
}
}