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-rw-r--r--libc-top-half/musl/src/stdio/vfwscanf.c332
1 files changed, 332 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/stdio/vfwscanf.c b/libc-top-half/musl/src/stdio/vfwscanf.c
new file mode 100644
index 0000000..82f4860
--- /dev/null
+++ b/libc-top-half/musl/src/stdio/vfwscanf.c
@@ -0,0 +1,332 @@
+#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 "stdio_impl.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 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;
+ size_t i, k;
+
+ FLOCK(f);
+
+ fwide(f, 1);
+
+ for (p=fmt; *p; p++) {
+
+ alloc = 0;
+
+ if (iswspace(*p)) {
+ while (iswspace(p[1])) p++;
+ while (iswspace((c=getwc(f)))) pos++;
+ ungetwc(c, f);
+ continue;
+ }
+ if (*p != '%' || p[1] == '%') {
+ if (*p == '%') {
+ p++;
+ while (iswspace((c=getwc(f)))) pos++;
+ } else {
+ 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') {
+ wcs = 0;
+ s = 0;
+ alloc = !!dest;
+ 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;
+ static const wchar_t spaces[] = {
+ ' ', '\t', '\n', '\r', 11, 12, 0x0085,
+ 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005,
+ 0x2006, 0x2008, 0x2009, 0x200a,
+ 0x2028, 0x2029, 0x205f, 0x3000, 0 };
+ set = spaces;
+ } 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;
+
+ i = 0;
+ if (alloc) {
+ k = t=='c' ? width+1U : 31;
+ if (size == SIZE_l) {
+ wcs = malloc(k*sizeof(wchar_t));
+ if (!wcs) goto alloc_fail;
+ } else {
+ s = malloc(k);
+ if (!s) goto alloc_fail;
+ }
+ }
+ while (width) {
+ if ((c=getwc(f))<0) break;
+ if (in_set(set, c) == invert)
+ break;
+ if (wcs) {
+ wcs[i++] = c;
+ if (alloc && i==k) {
+ k += k+1;
+ wchar_t *tmp = realloc(wcs, k*sizeof(wchar_t));
+ if (!tmp) goto alloc_fail;
+ wcs = tmp;
+ }
+ } else if (size != SIZE_l) {
+ int l = wctomb(s?s+i:tmp, c);
+ if (l<0) goto input_fail;
+ i += l;
+ if (alloc && i > k-4) {
+ k += k+1;
+ char *tmp = realloc(s, k);
+ if (!tmp) goto alloc_fail;
+ s = tmp;
+ }
+ }
+ pos++;
+ width-=(width>0);
+ gotmatch=1;
+ }
+ if (width) {
+ ungetwc(c, f);
+ if (t == 'c' || !gotmatch) goto match_fail;
+ }
+
+ if (alloc) {
+ if (size == SIZE_l) *(wchar_t **)dest = wcs;
+ else *(char **)dest = s;
+ }
+ if (t != 'c') {
+ if (wcs) wcs[i] = 0;
+ if (s) s[i] = 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:
+alloc_fail:
+input_fail:
+ if (!matches) matches--;
+match_fail:
+ if (alloc) {
+ free(s);
+ free(wcs);
+ }
+ }
+ FUNLOCK(f);
+ return matches;
+}
+
+weak_alias(vfwscanf,__isoc99_vfwscanf);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 22:16:44 +0000