#include <stdio.h>
-#include <string.h>
-#include <errno.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 "__scanf.h"
+#include "shgetc.h"
+#include "intscan.h"
+#include "floatscan.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 f_read(rctx_t *r)
+static void store_int(void *dest, int size, unsigned long long i)
{
- FILE *f = r->opaque;
- if ((r->c = fgetwc(f)) >= 0) r->l++;
+ 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 *f, const wchar_t *fmt, va_list ap)
{
- rctx_t r = { f_read, (void *)f, 1, iswspace };
- int result;
+ 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];
- result = __scanf(&r, fmt, ap);
+ FLOCK(f);
- if (r.u && r.c >= 0) {
- ungetwc(r.c, 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;
+ }
- return result;
+ 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 ls,lc -> S,C */
+ if (size==SIZE_l && (t&15)==3) t&=~32;
+
+ if (t != 'n' && t != '[' && (t|32) != 'c') {
+ while (iswspace((c=getwc(f)))) pos++;
+ 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 'c':
+ if (width < 1) width = 1;
+ s = dest;
+ for (; width && (c=getwc(f)) >= 0; width--) {
+ int l = wctomb(s?s:tmp, c);
+ if (l<0) goto input_fail;
+ if (s) s+=l;
+ pos++;
+ }
+ if (width) goto match_fail;
+ break;
+
+ case 'C':
+ if (width < 1) width = 1;
+ wcs = dest;
+ for (; width && (c=getwc(f)) >= 0; width--)
+ pos++, wcs && (*wcs++ = c);
+ if (width) goto match_fail;
+ break;
+
+ case 's':
+ if (width < 1) width = -1;
+ s = dest;
+ while (width && !iswspace(c=getwc(f)) && c!=EOF) {
+ int l = wctomb(s?s:tmp, c);
+ if (l<0) goto input_fail;
+ if (s) s+=l;
+ pos++;
+ width-=(width>0);
+ }
+ if (width) ungetwc(c, f);
+ if (s) *s = 0;
+ break;
+
+ case 'S':
+ wcs = dest;
+ if (width < 1) width = -1;
+ while (width && !iswspace(c=getwc(f)) && c!=EOF)
+ width-=(width>0), pos++, *wcs++ = c;
+ if (width) ungetwc(c, f);
+ if (wcs) *wcs = 0;
+ break;
+
+ case '[':
+ s = (size == SIZE_def) ? dest : 0;
+ wcs = (size == SIZE_l) ? dest : 0;
+
+ if (*++p == '^') p++, invert = 1;
+ else invert = 0;
+
+ int gotmatch = 0;
+
+ if (width < 1) width = -1;
+
+ while (width) {
+ if ((c=getwc(f))<0) break;
+ if (in_set(p, 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 (!gotmatch) goto match_fail;
+
+ if (*p==']') p++;
+ while (*p!=']') {
+ if (!*p) goto fmt_fail;
+ p++;
+ }
+
+ 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;
}
projects / musl / blobdiff