[398] | 1 | #include <stdio.h>
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| 2 | #include <stdlib.h>
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| 3 | #include <stdarg.h>
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| 4 | #include <ctype.h>
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| 5 | #include <wchar.h>
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| 6 | #include <wctype.h>
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| 7 | #include <limits.h>
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| 8 | #include <string.h>
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| 9 |
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| 10 | #include "stdio_impl.h"
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| 11 | #include "shgetc.h"
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| 12 | #include "intscan.h"
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| 13 | #include "floatscan.h"
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| 14 | #include "libc.h"
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| 15 |
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| 16 | #define SIZE_hh -2
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| 17 | #define SIZE_h -1
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| 18 | #define SIZE_def 0
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| 19 | #define SIZE_l 1
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| 20 | #define SIZE_L 2
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| 21 | #define SIZE_ll 3
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| 22 |
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| 23 | static void store_int(void *dest, int size, unsigned long long i)
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| 24 | {
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| 25 | if (!dest) return;
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| 26 | switch (size) {
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| 27 | case SIZE_hh:
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| 28 | *(char *)dest = i;
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| 29 | break;
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| 30 | case SIZE_h:
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| 31 | *(short *)dest = i;
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| 32 | break;
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| 33 | case SIZE_def:
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| 34 | *(int *)dest = i;
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| 35 | break;
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| 36 | case SIZE_l:
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| 37 | *(long *)dest = i;
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| 38 | break;
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| 39 | case SIZE_ll:
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| 40 | *(long long *)dest = i;
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| 41 | break;
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| 42 | }
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| 43 | }
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| 44 |
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| 45 | static void *arg_n(va_list ap, unsigned int n)
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| 46 | {
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| 47 | void *p;
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| 48 | unsigned int i;
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| 49 | va_list ap2;
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| 50 | va_copy(ap2, ap);
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| 51 | for (i=n; i>1; i--) va_arg(ap2, void *);
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| 52 | p = va_arg(ap2, void *);
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| 53 | va_end(ap2);
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| 54 | return p;
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| 55 | }
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| 56 |
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| 57 | static int in_set(const wchar_t *set, int c)
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| 58 | {
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| 59 | int j;
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| 60 | const wchar_t *p = set;
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| 61 | if (*p == '-') {
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| 62 | if (c=='-') return 1;
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| 63 | p++;
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| 64 | } else if (*p == ']') {
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| 65 | if (c==']') return 1;
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| 66 | p++;
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| 67 | }
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| 68 | for (; *p && *p != ']'; p++) {
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| 69 | if (*p=='-' && p[1] && p[1] != ']')
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| 70 | for (j=p++[-1]; j<*p; j++)
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| 71 | if (c==j) return 1;
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| 72 | if (c==*p) return 1;
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| 73 | }
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| 74 | return 0;
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| 75 | }
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| 76 |
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| 77 | #if 1
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| 78 | #undef getwc
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| 79 | #define getwc(f) \
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| 80 | ((f)->rpos < (f)->rend && *(f)->rpos < 128 ? *(f)->rpos++ : (getwc)(f))
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| 81 |
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| 82 | #undef ungetwc
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| 83 | #define ungetwc(c,f) \
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| 84 | ((f)->rend && (c)<128U ? *--(f)->rpos : ungetwc((c),(f)))
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| 85 | #endif
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| 86 |
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| 87 | int vfwscanf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
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| 88 | {
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| 89 | int width;
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| 90 | int size;
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| 91 | int alloc;
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| 92 | const wchar_t *p;
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| 93 | int c, t;
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| 94 | char *s;
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| 95 | wchar_t *wcs;
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| 96 | void *dest=NULL;
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| 97 | int invert;
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| 98 | int matches=0;
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| 99 | off_t pos = 0, cnt;
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| 100 | static const char size_pfx[][3] = { "hh", "h", "", "l", "L", "ll" };
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| 101 | char tmp[3*sizeof(int)+10];
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| 102 | const wchar_t *set;
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| 103 | size_t i, k;
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| 104 |
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| 105 | FLOCK(f);
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| 106 |
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| 107 | fwide(f, 1);
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| 108 |
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| 109 | for (p=fmt; *p; p++) {
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| 110 |
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| 111 | alloc = 0;
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| 112 |
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| 113 | if (iswspace(*p)) {
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| 114 | while (iswspace(p[1])) p++;
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| 115 | while (iswspace((c=getwc(f)))) pos++;
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| 116 | ungetwc(c, f);
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| 117 | continue;
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| 118 | }
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| 119 | if (*p != '%' || p[1] == '%') {
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| 120 | if (*p == '%') {
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| 121 | p++;
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| 122 | while (iswspace((c=getwc(f)))) pos++;
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| 123 | } else {
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| 124 | c = getwc(f);
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| 125 | }
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| 126 | if (c!=*p) {
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| 127 | ungetwc(c, f);
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| 128 | if (c<0) goto input_fail;
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| 129 | goto match_fail;
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| 130 | }
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| 131 | pos++;
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| 132 | continue;
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| 133 | }
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| 134 |
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| 135 | p++;
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| 136 | if (*p=='*') {
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| 137 | dest = 0; p++;
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| 138 | } else if (iswdigit(*p) && p[1]=='$') {
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| 139 | dest = arg_n(ap, *p-'0'); p+=2;
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| 140 | } else {
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| 141 | dest = va_arg(ap, void *);
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| 142 | }
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| 143 |
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| 144 | for (width=0; iswdigit(*p); p++) {
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| 145 | width = 10*width + *p - '0';
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| 146 | }
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| 147 |
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| 148 | if (*p=='m') {
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| 149 | wcs = 0;
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| 150 | s = 0;
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| 151 | alloc = !!dest;
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| 152 | p++;
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| 153 | } else {
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| 154 | alloc = 0;
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| 155 | }
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| 156 |
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| 157 | size = SIZE_def;
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| 158 | switch (*p++) {
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| 159 | case 'h':
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| 160 | if (*p == 'h') p++, size = SIZE_hh;
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| 161 | else size = SIZE_h;
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| 162 | break;
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| 163 | case 'l':
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| 164 | if (*p == 'l') p++, size = SIZE_ll;
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| 165 | else size = SIZE_l;
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| 166 | break;
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| 167 | case 'j':
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| 168 | size = SIZE_ll;
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| 169 | break;
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| 170 | case 'z':
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| 171 | case 't':
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| 172 | size = SIZE_l;
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| 173 | break;
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| 174 | case 'L':
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| 175 | size = SIZE_L;
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| 176 | break;
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| 177 | case 'd': case 'i': case 'o': case 'u': case 'x':
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| 178 | case 'a': case 'e': case 'f': case 'g':
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| 179 | case 'A': case 'E': case 'F': case 'G': case 'X':
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| 180 | case 's': case 'c': case '[':
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| 181 | case 'S': case 'C':
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| 182 | case 'p': case 'n':
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| 183 | p--;
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| 184 | break;
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| 185 | default:
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| 186 | goto fmt_fail;
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| 187 | }
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| 188 |
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| 189 | t = *p;
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| 190 |
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| 191 | /* Transform S,C -> ls,lc */
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| 192 | if ((t&0x2f)==3) {
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| 193 | size = SIZE_l;
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| 194 | t |= 32;
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| 195 | }
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| 196 |
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| 197 | if (t != 'n') {
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| 198 | if (t != '[' && (t|32) != 'c')
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| 199 | while (iswspace((c=getwc(f)))) pos++;
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| 200 | else
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| 201 | c=getwc(f);
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| 202 | if (c < 0) goto input_fail;
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| 203 | ungetwc(c, f);
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| 204 | }
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| 205 |
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| 206 | switch (t) {
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| 207 | case 'n':
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| 208 | store_int(dest, size, pos);
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| 209 | /* do not increment match count, etc! */
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| 210 | continue;
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| 211 |
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| 212 | case 's':
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| 213 | case 'c':
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| 214 | case '[':
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| 215 | if (t == 'c') {
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| 216 | if (width<1) width = 1;
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| 217 | invert = 1;
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| 218 | set = L"";
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| 219 | } else if (t == 's') {
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| 220 | invert = 1;
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| 221 | static const wchar_t spaces[] = {
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| 222 | ' ', '\t', '\n', '\r', 11, 12, 0x0085,
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| 223 | 0x2000, 0x2001, 0x2002, 0x2003, 0x2004, 0x2005,
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| 224 | 0x2006, 0x2008, 0x2009, 0x200a,
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| 225 | 0x2028, 0x2029, 0x205f, 0x3000, 0 };
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| 226 | set = spaces;
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| 227 | } else {
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| 228 | if (*++p == '^') p++, invert = 1;
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| 229 | else invert = 0;
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| 230 | set = p;
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| 231 | if (*p==']') p++;
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| 232 | while (*p!=']') {
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| 233 | if (!*p) goto fmt_fail;
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| 234 | p++;
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| 235 | }
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| 236 | }
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| 237 |
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| 238 | s = (size == SIZE_def) ? dest : 0;
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| 239 | wcs = (size == SIZE_l) ? dest : 0;
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| 240 |
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| 241 | int gotmatch = 0;
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| 242 |
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| 243 | if (width < 1) width = -1;
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| 244 |
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| 245 | i = 0;
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| 246 | if (alloc) {
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| 247 | k = t=='c' ? width+1U : 31;
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| 248 | if (size == SIZE_l) {
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| 249 | wcs = malloc(k*sizeof(wchar_t));
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| 250 | if (!wcs) goto alloc_fail;
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| 251 | } else {
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| 252 | s = malloc(k);
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| 253 | if (!s) goto alloc_fail;
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| 254 | }
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| 255 | }
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| 256 | while (width) {
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| 257 | if ((c=getwc(f))<0) break;
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| 258 | if (in_set(set, c) == invert)
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| 259 | break;
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| 260 | if (wcs) {
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| 261 | wcs[i++] = c;
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| 262 | if (alloc && i==k) {
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| 263 | k += k+1;
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| 264 | wchar_t *tmp = realloc(wcs, k*sizeof(wchar_t));
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| 265 | if (!tmp) goto alloc_fail;
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| 266 | wcs = tmp;
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| 267 | }
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| 268 | } else if (size != SIZE_l) {
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| 269 | int l = wctomb(s?s+i:tmp, c);
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| 270 | if (l<0) goto input_fail;
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| 271 | i += l;
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| 272 | if (alloc && i > k-4) {
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| 273 | k += k+1;
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| 274 | char *tmp = realloc(s, k);
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| 275 | if (!tmp) goto alloc_fail;
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| 276 | s = tmp;
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| 277 | }
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| 278 | }
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| 279 | pos++;
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| 280 | width-=(width>0);
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| 281 | gotmatch=1;
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| 282 | }
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| 283 | if (width) {
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| 284 | ungetwc(c, f);
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| 285 | if (t == 'c' || !gotmatch) goto match_fail;
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| 286 | }
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| 287 |
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| 288 | if (alloc) {
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| 289 | if (size == SIZE_l) *(wchar_t **)dest = wcs;
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| 290 | else *(char **)dest = s;
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| 291 | }
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| 292 | if (t != 'c') {
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| 293 | if (wcs) wcs[i] = 0;
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| 294 | if (s) s[i] = 0;
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| 295 | }
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| 296 | break;
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| 297 |
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| 298 | case 'd': case 'i': case 'o': case 'u': case 'x':
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| 299 | case 'a': case 'e': case 'f': case 'g':
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| 300 | case 'A': case 'E': case 'F': case 'G': case 'X':
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| 301 | case 'p':
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| 302 | if (width < 1) width = 0;
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| 303 | snprintf(tmp, sizeof tmp, "%.*s%.0d%s%c%%lln",
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| 304 | 1+!dest, "%*", width, size_pfx[size+2], t);
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| 305 | cnt = 0;
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| 306 | if (fscanf(f, tmp, dest?dest:&cnt, &cnt) == -1)
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| 307 | goto input_fail;
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| 308 | else if (!cnt)
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| 309 | goto match_fail;
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| 310 | pos += cnt;
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| 311 | break;
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| 312 | default:
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| 313 | goto fmt_fail;
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| 314 | }
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| 315 |
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| 316 | if (dest) matches++;
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| 317 | }
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| 318 | if (0) {
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| 319 | fmt_fail:
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| 320 | alloc_fail:
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| 321 | input_fail:
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| 322 | if (!matches) matches--;
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| 323 | match_fail:
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| 324 | if (alloc) {
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| 325 | free(s);
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| 326 | free(wcs);
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| 327 | }
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| 328 | }
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| 329 | FUNLOCK(f);
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| 330 | return matches;
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| 331 | }
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| 332 |
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| 333 | weak_alias(vfwscanf,__isoc99_vfwscanf);
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