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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include <wchar.h>
#include <wctype.h>
#include <limits.h>
#include <string.h>
#include <errno.h>
#include <math.h>
#include <float.h>
#include "stdio_impl.h"
#include "shgetc.h"
#include "intscan.h"
#include "floatscan.h"
#include "libc.h"
#define SIZE_hh -2
#define SIZE_h -1
#define SIZE_def 0
#define SIZE_l 1
#define SIZE_L 2
#define SIZE_ll 3
static void store_int(void *dest, int size, unsigned long long i)
{
if (!dest) return;
switch (size) {
case SIZE_hh:
*(char *)dest = i;
break;
case SIZE_h:
*(short *)dest = i;
break;
case SIZE_def:
*(int *)dest = i;
break;
case SIZE_l:
*(long *)dest = i;
break;
case SIZE_ll:
*(long long *)dest = i;
break;
}
}
static void *arg_n(va_list ap, unsigned int n)
{
void *p;
unsigned int i;
va_list ap2;
va_copy(ap2, ap);
for (i=n; i>1; i--) va_arg(ap2, void *);
p = va_arg(ap2, void *);
va_end(ap2);
return p;
}
static int in_set(const wchar_t *set, int c)
{
int j;
const wchar_t *p = set;
if (*p == '-') {
if (c=='-') return 1;
p++;
} else if (*p == ']') {
if (c==']') return 1;
p++;
}
for (; *p && *p != ']'; p++) {
if (*p=='-' && p[1] && p[1] != ']')
for (j=p++[-1]; j<*p; j++)
if (c==j) return 1;
if (c==*p) return 1;
}
return 0;
}
#if 1
#undef getwc
#define getwc(f) \
((f)->rpos < (f)->rend && *(f)->rpos < 128 ? *(f)->rpos++ : (getwc)(f))
#undef ungetwc
#define ungetwc(c,f) \
((f)->rend && (c)<128U ? *--(f)->rpos : ungetwc((c),(f)))
#endif
int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
{
int width;
int size;
int alloc;
const wchar_t *p;
int c, t;
char *s;
wchar_t *wcs;
void *dest=NULL;
int invert;
int matches=0;
off_t pos = 0, cnt;
static const char size_pfx[][3] = { "hh", "h", "", "l", "L", "ll" };
char tmp[3*sizeof(int)+10];
const wchar_t *set;
FLOCK(f);
for (p=fmt; *p; p++) {
if (iswspace(*p)) {
while (iswspace(p[1])) p++;
while (iswspace((c=getwc(f)))) pos++;
ungetwc(c, f);
continue;
}
if (*p != '%' || p[1] == '%') {
p += *p=='%';
c = getwc(f);
if (c!=*p) {
ungetwc(c, f);
if (c<0) goto input_fail;
goto match_fail;
}
pos++;
continue;
}
p++;
if (*p=='*') {
dest = 0; p++;
} else if (iswdigit(*p) && p[1]=='$') {
dest = arg_n(ap, *p-'0'); p+=2;
} else {
dest = va_arg(ap, void *);
}
for (width=0; iswdigit(*p); p++) {
width = 10*width + *p - '0';
}
if (*p=='m') {
alloc = 1;
p++;
} else {
alloc = 0;
}
size = SIZE_def;
switch (*p++) {
case 'h':
if (*p == 'h') p++, size = SIZE_hh;
else size = SIZE_h;
break;
case 'l':
if (*p == 'l') p++, size = SIZE_ll;
else size = SIZE_l;
break;
case 'j':
size = SIZE_ll;
break;
case 'z':
case 't':
size = SIZE_l;
break;
case 'L':
size = SIZE_L;
break;
case 'd': case 'i': case 'o': case 'u': case 'x':
case 'a': case 'e': case 'f': case 'g':
case 'A': case 'E': case 'F': case 'G': case 'X':
case 's': case 'c': case '[':
case 'S': case 'C':
case 'p': case 'n':
p--;
break;
default:
goto fmt_fail;
}
t = *p;
/* Transform S,C -> ls,lc */
if ((t&0x2f)==3) {
size = SIZE_l;
t |= 32;
}
if (t != 'n') {
if (t != '[' && (t|32) != 'c')
while (iswspace((c=getwc(f)))) pos++;
else
c=getwc(f);
if (c < 0) goto input_fail;
ungetwc(c, f);
}
switch (t) {
case 'n':
store_int(dest, size, pos);
/* do not increment match count, etc! */
continue;
case 's':
case 'c':
case '[':
if (t == 'c') {
if (width<1) width = 1;
invert = 1;
set = L"";
} else if (t == 's') {
invert = 1;
set = (const wchar_t[]){
' ', '\t', '\n', '\r', 11, 12, 0x0085,
0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005,
0x2006, 0x2008, 0x2009, 0x200a,
0x2028, 0x2029, 0x205f, 0x3000, 0 };
} else {
if (*++p == '^') p++, invert = 1;
else invert = 0;
set = p;
if (*p==']') p++;
while (*p!=']') {
if (!*p) goto fmt_fail;
p++;
}
}
s = (size == SIZE_def) ? dest : 0;
wcs = (size == SIZE_l) ? dest : 0;
int gotmatch = 0;
if (width < 1) width = -1;
while (width) {
if ((c=getwc(f))<0) break;
if (in_set(set, c) == invert)
break;
if (wcs) {
*wcs++ = c;
} else if (size != SIZE_l) {
int l = wctomb(s?s:tmp, c);
if (l<0) goto input_fail;
if (s) s+=l;
}
pos++;
width-=(width>0);
gotmatch=1;
}
if (width) {
ungetwc(c, f);
if (t == 'c' || !gotmatch) goto match_fail;
}
if (wcs) *wcs++ = 0;
if (s) *s++ = 0;
break;
case 'd': case 'i': case 'o': case 'u': case 'x':
case 'a': case 'e': case 'f': case 'g':
case 'A': case 'E': case 'F': case 'G': case 'X':
case 'p':
if (width < 1) width = 0;
snprintf(tmp, sizeof tmp, "%.*s%.0d%s%c%%lln",
1+!dest, "%*", width, size_pfx[size+2], t);
cnt = 0;
if (fscanf(f, tmp, dest?dest:&cnt, &cnt) == -1)
goto input_fail;
else if (!cnt)
goto match_fail;
pos += cnt;
break;
default:
goto fmt_fail;
}
if (dest) matches++;
}
if (0) {
fmt_fail:
input_fail:
if (!matches) matches--;
}
match_fail:
FUNLOCK(f);
return matches;
}
weak_alias(vfwscanf,__isoc99_vfwscanf);
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