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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 | #include "stdio_impl.h" #include <errno.h> #include <ctype.h> #include <limits.h> #include <string.h> #include <stdarg.h> #include <wchar.h> #include <inttypes.h> /* Convenient bit representation for modifier flags, which all fall * within 31 codepoints of the space character. */ #define ALT_FORM (1U<<'#'-' ') #define ZERO_PAD (1U<<'0'-' ') #define LEFT_ADJ (1U<<'-'-' ') #define PAD_POS (1U<<' '-' ') #define MARK_POS (1U<<'+'-' ') #define GROUPED (1U<<'\''-' ') #define FLAGMASK (ALT_FORM|ZERO_PAD|LEFT_ADJ|PAD_POS|MARK_POS|GROUPED) #if UINT_MAX == ULONG_MAX #define LONG_IS_INT #endif #if SIZE_MAX != ULONG_MAX || UINTMAX_MAX != ULLONG_MAX #define ODD_TYPES #endif /* State machine to accept length modifiers + conversion specifiers. * Result is 0 on failure, or an argument type to pop on success. */ enum { BARE, LPRE, LLPRE, HPRE, HHPRE, BIGLPRE, ZTPRE, JPRE, STOP, PTR, INT, UINT, ULLONG, #ifndef LONG_IS_INT LONG, ULONG, #else #define LONG INT #define ULONG UINT #endif SHORT, USHORT, CHAR, UCHAR, #ifdef ODD_TYPES LLONG, SIZET, IMAX, UMAX, PDIFF, UIPTR, #else #define LLONG ULLONG #define SIZET ULONG #define IMAX LLONG #define UMAX ULLONG #define PDIFF LONG #define UIPTR ULONG #endif DBL, LDBL, NOARG, MAXSTATE }; #define S(x) [(x)-'A'] static const unsigned char states[]['z'-'A'+1] = { { /* 0: bare types */ S('d') = INT, S('i') = INT, S('o') = UINT, S('u') = UINT, S('x') = UINT, S('X') = UINT, S('e') = DBL, S('f') = DBL, S('g') = DBL, S('a') = DBL, S('E') = DBL, S('F') = DBL, S('G') = DBL, S('A') = DBL, S('c') = CHAR, S('C') = INT, S('s') = PTR, S('S') = PTR, S('p') = UIPTR, S('n') = PTR, S('m') = NOARG, S('l') = LPRE, S('h') = HPRE, S('L') = BIGLPRE, S('z') = ZTPRE, S('j') = JPRE, S('t') = ZTPRE, }, { /* 1: l-prefixed */ S('d') = LONG, S('i') = LONG, S('o') = ULONG, S('u') = ULONG, S('x') = ULONG, S('X') = ULONG, S('c') = INT, S('s') = PTR, S('n') = PTR, S('l') = LLPRE, }, { /* 2: ll-prefixed */ S('d') = LLONG, S('i') = LLONG, S('o') = ULLONG, S('u') = ULLONG, S('x') = ULLONG, S('X') = ULLONG, S('n') = PTR, }, { /* 3: h-prefixed */ S('d') = SHORT, S('i') = SHORT, S('o') = USHORT, S('u') = USHORT, S('x') = USHORT, S('X') = USHORT, S('n') = PTR, S('h') = HHPRE, }, { /* 4: hh-prefixed */ S('d') = CHAR, S('i') = CHAR, S('o') = UCHAR, S('u') = UCHAR, S('x') = UCHAR, S('X') = UCHAR, S('n') = PTR, }, { /* 5: L-prefixed */ S('e') = LDBL, S('f') = LDBL, S('g') = LDBL, S('a') = LDBL, S('E') = LDBL, S('F') = LDBL, S('G') = LDBL, S('A') = LDBL, S('n') = PTR, }, { /* 6: z- or t-prefixed (assumed to be same size) */ S('d') = PDIFF, S('i') = PDIFF, S('o') = SIZET, S('u') = SIZET, S('x') = SIZET, S('X') = SIZET, S('n') = PTR, }, { /* 7: j-prefixed */ S('d') = IMAX, S('i') = IMAX, S('o') = UMAX, S('u') = UMAX, S('x') = UMAX, S('X') = UMAX, S('n') = PTR, } }; #define OOB(x) ((unsigned)(x)-'A' > 'z'-'A') union arg { uintmax_t i; long double f; void *p; }; static void pop_arg(union arg *arg, int type, va_list *ap) { /* Give the compiler a hint for optimizing the switch. */ if ((unsigned)type > MAXSTATE) return; switch (type) { case PTR: arg->p = va_arg(*ap, void *); break; case INT: arg->i = va_arg(*ap, int); break; case UINT: arg->i = va_arg(*ap, unsigned int); #ifndef LONG_IS_INT break; case LONG: arg->i = va_arg(*ap, long); break; case ULONG: arg->i = va_arg(*ap, unsigned long); #endif break; case ULLONG: arg->i = va_arg(*ap, unsigned long long); break; case SHORT: arg->i = (short)va_arg(*ap, int); break; case USHORT: arg->i = (unsigned short)va_arg(*ap, int); break; case CHAR: arg->i = (signed char)va_arg(*ap, int); break; case UCHAR: arg->i = (unsigned char)va_arg(*ap, int); #ifdef ODD_TYPES break; case LLONG: arg->i = va_arg(*ap, long long); break; case SIZET: arg->i = va_arg(*ap, size_t); break; case IMAX: arg->i = va_arg(*ap, intmax_t); break; case UMAX: arg->i = va_arg(*ap, uintmax_t); break; case PDIFF: arg->i = va_arg(*ap, ptrdiff_t); break; case UIPTR: arg->i = (uintptr_t)va_arg(*ap, void *); #endif break; case DBL: arg->f = va_arg(*ap, double); break; case LDBL: arg->f = va_arg(*ap, long double); } } static void out(FILE *f, const wchar_t *s, size_t l) { while (l-- && !(f->flags & F_ERR)) fputwc(*s++, f); } static int getint(wchar_t **s) { int i; for (i=0; iswdigit(**s); (*s)++) i = 10*i + (**s-'0'); return i; } static const char sizeprefix['y'-'a'] = { ['a'-'a']='L', ['e'-'a']='L', ['f'-'a']='L', ['g'-'a']='L', ['d'-'a']='j', ['i'-'a']='j', ['o'-'a']='j', ['u'-'a']='j', ['x'-'a']='j', ['p'-'a']='j' }; static int wprintf_core(FILE *f, const wchar_t *fmt, va_list *ap, union arg *nl_arg, int *nl_type) { wchar_t *a, *z, *s=(wchar_t *)fmt; unsigned l10n=0, litpct, fl; int w, p; union arg arg; int argpos; unsigned st, ps; int cnt=0, l=0; int i; int t; char *bs; char charfmt[16]; wchar_t wc; for (;;) { /* Update output count, end loop when fmt is exhausted */ if (cnt >= 0) { if (l > INT_MAX - cnt) { if (!ferror(f)) errno = EOVERFLOW; cnt = -1; } else cnt += l; } if (!*s) break; /* Handle literal text and %% format specifiers */ for (a=s; *s && *s!='%'; s++); litpct = wcsspn(s, L"%")/2; /* Optimize %%%% runs */ z = s+litpct; s += 2*litpct; l = z-a; if (f) out(f, a, l); if (l) continue; if (iswdigit(s[1]) && s[2]=='$') { l10n=1; argpos = s[1]-'0'; s+=3; } else { argpos = -1; s++; } /* Read modifier flags */ for (fl=0; (unsigned)*s-' '<32 && (FLAGMASK&(1U<<*s-' ')); s++) fl |= 1U<<*s-' '; /* Read field width */ if (*s=='*') { if (iswdigit(s[1]) && s[2]=='$') { l10n=1; nl_type[s[1]-'0'] = INT; w = nl_arg[s[1]-'0'].i; s+=3; } else if (!l10n) { w = f ? va_arg(*ap, int) : 0; s++; } else return -1; if (w<0) fl|=LEFT_ADJ, w=-w; } else if ((w=getint(&s))<0) return -1; /* Read precision */ if (*s=='.' && s[1]=='*') { if (isdigit(s[2]) && s[3]=='$') { nl_type[s[2]-'0'] = INT; p = nl_arg[s[2]-'0'].i; s+=4; } else if (!l10n) { p = f ? va_arg(*ap, int) : 0; s+=2; } else return -1; } else if (*s=='.') { s++; p = getint(&s); } else p = -1; /* Format specifier state machine */ st=0; do { if (OOB(*s)) return -1; ps=st; st=states[st]S(*s++); } while (st-1<STOP); if (!st) return -1; /* Check validity of argument type (nl/normal) */ if (st==NOARG) { if (argpos>=0) return -1; } else { if (argpos>=0) nl_type[argpos]=st, arg=nl_arg[argpos]; else if (f) pop_arg(&arg, st, ap); else return 0; } if (!f) continue; t = s[-1]; if (ps && (t&15)==3) t&=~32; switch (t) { case 'n': switch(ps) { case BARE: *(int *)arg.p = cnt; break; case LPRE: *(long *)arg.p = cnt; break; case LLPRE: *(long long *)arg.p = cnt; break; case HPRE: *(unsigned short *)arg.p = cnt; break; case HHPRE: *(unsigned char *)arg.p = cnt; break; case ZTPRE: *(size_t *)arg.p = cnt; break; case JPRE: *(uintmax_t *)arg.p = cnt; break; } continue; case 'c': fputwc(btowc(arg.i), f); l = 1; continue; case 'C': fputwc(arg.i, f); l = 1; continue; case 'S': a = arg.p; z = wmemchr(a, 0, p); if (z) p=z-a; if (w<p) w=p; if (!(fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, ""); out(f, a, p); if ((fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, ""); l=w; continue; case 's': bs = arg.p; if (p<0) p = INT_MAX; for (i=l=0; l<p && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++); if (i<0) return -1; p=l; if (w<p) w=p; if (!(fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, ""); bs = arg.p; while (l--) { i=mbtowc(&wc, bs, MB_LEN_MAX); bs+=i; fputwc(wc, f); } if ((fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, ""); l=w; continue; } snprintf(charfmt, sizeof charfmt, "%%%s%s%s%s%s*.*%c%c", "#"+!(fl & ALT_FORM), "+"+!(fl & MARK_POS), "-"+!(fl & LEFT_ADJ), " "+!(fl & PAD_POS), "0"+!(fl & ZERO_PAD), sizeprefix[(t|32)-'a'], t); switch (t|32) { case 'a': case 'e': case 'f': case 'g': l = fprintf(f, charfmt, w, p, arg.f); break; case 'd': case 'i': case 'o': case 'u': case 'x': case 'p': l = fprintf(f, charfmt, w, p, arg.i); break; } } if (f) return cnt; if (!l10n) return 0; for (i=1; i<=NL_ARGMAX && nl_type[i]; i++) pop_arg(nl_arg+i, nl_type[i], ap); for (; i<=NL_ARGMAX && !nl_type[i]; i++); if (i<=NL_ARGMAX) return -1; return 1; } int vfwprintf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap) { va_list ap2; int nl_type[NL_ARGMAX] = {0}; union arg nl_arg[NL_ARGMAX]; int olderr; int ret; /* the copy allows passing va_list* even if va_list is an array */ va_copy(ap2, ap); if (wprintf_core(0, fmt, &ap2, nl_arg, nl_type) < 0) { va_end(ap2); return -1; } FLOCK(f); f->mode |= f->mode+1; olderr = f->flags & F_ERR; f->flags &= ~F_ERR; ret = wprintf_core(f, fmt, &ap2, nl_arg, nl_type); if (f->flags & F_ERR) ret = -1; f->flags |= olderr; FUNLOCK(f); va_end(ap2); return ret; } |