#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdarg.h>
#include <string.h>
#include "k5-int.h"
#if 0
#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "local.h"
#define FLOATING_POINT
#include "floatio.h"
#endif
#define BUF 513
#define LONG 0x01
#define LONGDBL 0x02
#define SHORT 0x04
#define SUPPRESS 0x08
#define POINTER 0x10
#define NOSKIP 0x20
#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
static u_char *__sccl(char *tab, u_char *fmt);
int KRB5_CALLCONV_C
sscanf(char *str, char const *fmt0, ...)
{
va_list ap;
register u_char *fmt = (u_char *)fmt0;
register int c;
register size_t width;
register char *p;
register int n;
register int flags;
register char *p0;
int nassigned;
int nread;
int base;
u_long (*ccfn)();
char ccltab[256];
char buf[BUF];
int chars_left;
char *char_ptr;
static short basefix[17] =
{ 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
chars_left = strlen(str);
char_ptr = str;
va_start(ap, fmt0);
nassigned = 0;
nread = 0;
base = 0;
ccfn = NULL;
for (;;) {
c = *fmt++;
if (c == 0) {
va_end(ap);
return (nassigned);
}
if (isspace(c)) {
for (;;) {
if (chars_left <= 0) {
va_end(ap);
return (nassigned);
}
if (!isspace(*char_ptr))
break;
nread++, chars_left--, char_ptr++;
}
continue;
}
if (c != '%')
goto literal;
width = 0;
flags = 0;
again: c = *fmt++;
switch (c) {
case '%':
literal:
if (chars_left <= 0)
goto input_failure;
if (*char_ptr != c)
goto match_failure;
chars_left--, char_ptr++;
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;
case 'D':
flags |= LONG;
case 'd':
c = CT_INT;
ccfn = (u_long (*)())strtol;
base = 10;
break;
case 'i':
c = CT_INT;
ccfn = (u_long (*)())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':
flags |= LONG;
case 'x':
flags |= PFXOK;
c = CT_INT;
ccfn = strtoul;
base = 16;
break;
#ifdef FLOATING_POINT
case 'E':
case 'F':
flags |= LONG;
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':
va_end(ap);
return (EOF);
default:
if (isupper(c))
flags |= LONG;
c = CT_INT;
ccfn = (u_long (*)())strtol;
base = 10;
break;
}
if (chars_left <= 0)
goto input_failure;
if ((flags & NOSKIP) == 0) {
while (isspace(*char_ptr)) {
nread++;
if (--chars_left > 0)
char_ptr++;
else
goto input_failure;
}
}
switch (c) {
case CT_CHAR:
if (width == 0)
width = 1;
if (flags & SUPPRESS) {
size_t sum = 0;
for (;;) {
if ((size_t) (n = chars_left) < width) {
sum += n;
width -= n;
char_ptr += n;
if (sum == 0)
goto input_failure;
} else {
sum += width;
chars_left -= width;
char_ptr += width;
break;
}
}
nread += sum;
} else {
size_t r;
char *dest;
dest = (char *)va_arg(ap, char *);
r = width;
if (r > (size_t) chars_left)
r = chars_left;
strncpy(dest, char_ptr, width);
if (r == 0)
goto input_failure;
nread += r;
nassigned++;
}
break;
case CT_CCL:
if (width == 0)
width = (size_t) ~0;
if (flags & SUPPRESS) {
n = 0;
while (ccltab[*char_ptr]) {
n++, chars_left--, char_ptr++;
if (--width == 0)
break;
if (chars_left <= 0) {
if (n == 0)
goto input_failure;
break;
}
}
if (n == 0)
goto match_failure;
} else {
p0 = p = va_arg(ap, char *);
while (ccltab[*char_ptr]) {
chars_left--;
*p++ = *char_ptr++;
if (--width == 0)
break;
if (chars_left <= 0) {
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:
if (width == 0)
width = (size_t) ~0;
if (flags & SUPPRESS) {
n = 0;
while (!isspace(*char_ptr)) {
n++, chars_left--, char_ptr++;
if (--width == 0)
break;
if (chars_left <= 0)
break;
}
nread += n;
} else {
p0 = p = va_arg(ap, char *);
while (!isspace(*char_ptr)) {
chars_left--;
*p++ = *char_ptr++;
if (--width == 0)
break;
if (chars_left <= 0)
break;
}
*p = 0;
nread += p - p0;
nassigned++;
}
continue;
case CT_INT:
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | NZDIGITS;
for (p = buf; width; width--) {
c = *char_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;
if (--chars_left > 0)
char_ptr++;
else
break;
}
if (flags & NDIGITS) {
if (p > buf) {
chars_left++;
char_ptr--;
*char_ptr = *(u_char *)--p;
}
goto match_failure;
}
c = ((u_char *)p)[-1];
if (c == 'x' || c == 'X') {
--p;
chars_left++;
char_ptr--;
*char_ptr = 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 *) = (short) res;
else if (flags & LONG)
*va_arg(ap, long *) = res;
else
*va_arg(ap, int *) = (int) res;
nassigned++;
}
nread += p - buf;
break;
#ifdef FLOATING_POINT
case CT_FLOAT:
#ifdef hardway
if (width == 0 || width > sizeof(buf) - 1)
width = sizeof(buf) - 1;
#else
if (--width > sizeof(buf) - 2)
width = sizeof(buf) - 2;
width++;
#endif
flags |= SIGNOK | NDIGITS | DPTOK | EXPOK;
for (p = buf; width; width--) {
c = *char_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;
if (--chars_left > 0)
char_ptr++;
else
break;
}
if (flags & NDIGITS) {
if (flags & EXPOK) {
while (p > buf) {
chars_left++;
char_ptr--;
*char_ptr = *(u_char *)--p;
}
goto match_failure;
}
c = *(u_char *)--p;
if (c != 'e' && c != 'E') {
chars_left++;
char_ptr--;
*char_ptr = c;
c = *(u_char *)--p;
}
chars_left++;
char_ptr--;
*char_ptr = c;
}
if ((flags & SUPPRESS) == 0) {
double res;
*p = 0;
res = strtod(buf,(char **) NULL);
if (flags & LONG)
*va_arg(ap, double *) = res;
else
*va_arg(ap, float *) = res;
nassigned++;
}
nread += p - buf;
break;
#endif
}
}
input_failure:
va_end(ap);
return (nassigned ? nassigned : -1);
match_failure:
va_end(ap);
return (nassigned);
}
static u_char *
__sccl(tab, fmt)
register char *tab;
register 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;
}
}
}