1 #include "stdio_impl.h"
11 /* Convenient bit representation for modifier flags, which all fall
12 * within 31 codepoints of the space character. */
14 #define ALT_FORM (1U<<'#'-' ')
15 #define ZERO_PAD (1U<<'0'-' ')
16 #define LEFT_ADJ (1U<<'-'-' ')
17 #define PAD_POS (1U<<' '-' ')
18 #define MARK_POS (1U<<'+'-' ')
19 #define GROUPED (1U<<'\''-' ')
21 #define FLAGMASK (ALT_FORM|ZERO_PAD|LEFT_ADJ|PAD_POS|MARK_POS|GROUPED)
23 /* State machine to accept length modifiers + conversion specifiers.
24 * Result is 0 on failure, or an argument type to pop on success. */
27 BARE, LPRE, LLPRE, HPRE, HHPRE, BIGLPRE,
30 PTR, INT, UINT, ULLONG,
32 SHORT, USHORT, CHAR, UCHAR,
33 LLONG, SIZET, IMAX, UMAX, PDIFF, UIPTR,
39 #define S(x) [(x)-'A']
41 static const unsigned char states[]['z'-'A'+1] = {
43 S('d') = INT, S('i') = INT,
44 S('o') = UINT, S('u') = UINT, S('x') = UINT, S('X') = UINT,
45 S('e') = DBL, S('f') = DBL, S('g') = DBL, S('a') = DBL,
46 S('E') = DBL, S('F') = DBL, S('G') = DBL, S('A') = DBL,
47 S('c') = CHAR, S('C') = INT,
48 S('s') = PTR, S('S') = PTR, S('p') = UIPTR, S('n') = PTR,
50 S('l') = LPRE, S('h') = HPRE, S('L') = BIGLPRE,
51 S('z') = ZTPRE, S('j') = JPRE, S('t') = ZTPRE,
52 }, { /* 1: l-prefixed */
53 S('d') = LONG, S('i') = LONG,
54 S('o') = ULONG, S('u') = ULONG, S('x') = ULONG, S('X') = ULONG,
55 S('c') = INT, S('s') = PTR, S('n') = PTR,
57 }, { /* 2: ll-prefixed */
58 S('d') = LLONG, S('i') = LLONG,
59 S('o') = ULLONG, S('u') = ULLONG,
60 S('x') = ULLONG, S('X') = ULLONG,
62 }, { /* 3: h-prefixed */
63 S('d') = SHORT, S('i') = SHORT,
64 S('o') = USHORT, S('u') = USHORT,
65 S('x') = USHORT, S('X') = USHORT,
68 }, { /* 4: hh-prefixed */
69 S('d') = CHAR, S('i') = CHAR,
70 S('o') = UCHAR, S('u') = UCHAR,
71 S('x') = UCHAR, S('X') = UCHAR,
73 }, { /* 5: L-prefixed */
74 S('e') = LDBL, S('f') = LDBL, S('g') = LDBL, S('a') = LDBL,
75 S('E') = LDBL, S('F') = LDBL, S('G') = LDBL, S('A') = LDBL,
77 }, { /* 6: z- or t-prefixed (assumed to be same size) */
78 S('d') = PDIFF, S('i') = PDIFF,
79 S('o') = SIZET, S('u') = SIZET,
80 S('x') = SIZET, S('X') = SIZET,
82 }, { /* 7: j-prefixed */
83 S('d') = IMAX, S('i') = IMAX,
84 S('o') = UMAX, S('u') = UMAX,
85 S('x') = UMAX, S('X') = UMAX,
90 #define OOB(x) ((unsigned)(x)-'A' > 'z'-'A')
99 static void pop_arg(union arg *arg, int type, va_list *ap)
101 /* Give the compiler a hint for optimizing the switch. */
102 if ((unsigned)type > MAXSTATE) return;
104 case PTR: arg->p = va_arg(*ap, void *);
105 break; case INT: arg->i = va_arg(*ap, int);
106 break; case UINT: arg->i = va_arg(*ap, unsigned int);
107 break; case LONG: arg->i = va_arg(*ap, long);
108 break; case ULONG: arg->i = va_arg(*ap, unsigned long);
109 break; case ULLONG: arg->i = va_arg(*ap, unsigned long long);
110 break; case SHORT: arg->i = (short)va_arg(*ap, int);
111 break; case USHORT: arg->i = (unsigned short)va_arg(*ap, int);
112 break; case CHAR: arg->i = (signed char)va_arg(*ap, int);
113 break; case UCHAR: arg->i = (unsigned char)va_arg(*ap, int);
114 break; case LLONG: arg->i = va_arg(*ap, long long);
115 break; case SIZET: arg->i = va_arg(*ap, size_t);
116 break; case IMAX: arg->i = va_arg(*ap, intmax_t);
117 break; case UMAX: arg->i = va_arg(*ap, uintmax_t);
118 break; case PDIFF: arg->i = va_arg(*ap, ptrdiff_t);
119 break; case UIPTR: arg->i = (uintptr_t)va_arg(*ap, void *);
120 break; case DBL: arg->f = va_arg(*ap, double);
121 break; case LDBL: arg->f = va_arg(*ap, long double);
125 static void out(FILE *f, const wchar_t *s, size_t l)
127 while (l-- && !(f->flags & F_ERR)) fputwc(*s++, f);
130 static int getint(wchar_t **s) {
132 for (i=0; iswdigit(**s); (*s)++) {
133 if (i > INT_MAX/10U || **s-'0' > INT_MAX-10*i) i = -1;
134 else i = 10*i + (**s-'0');
139 static const char sizeprefix['y'-'a'] = {
140 ['a'-'a']='L', ['e'-'a']='L', ['f'-'a']='L', ['g'-'a']='L',
141 ['d'-'a']='j', ['i'-'a']='j', ['o'-'a']='j', ['u'-'a']='j', ['x'-'a']='j',
145 static int wprintf_core(FILE *f, const wchar_t *fmt, va_list *ap, union arg *nl_arg, int *nl_type)
147 wchar_t *a, *z, *s=(wchar_t *)fmt;
161 /* This error is only specified for snprintf, but since it's
162 * unspecified for other forms, do the same. Stop immediately
163 * on overflow; otherwise %n could produce wrong results. */
164 if (l > INT_MAX - cnt) goto overflow;
166 /* Update output count, end loop when fmt is exhausted */
170 /* Handle literal text and %% format specifiers */
171 for (a=s; *s && *s!='%'; s++);
172 for (z=s; s[0]=='%' && s[1]=='%'; z++, s+=2);
173 if (z-a > INT_MAX-cnt) goto overflow;
178 if (iswdigit(s[1]) && s[2]=='$') {
187 /* Read modifier flags */
188 for (fl=0; (unsigned)*s-' '<32 && (FLAGMASK&(1U<<*s-' ')); s++)
191 /* Read field width */
193 if (iswdigit(s[1]) && s[2]=='$') {
195 nl_type[s[1]-'0'] = INT;
196 w = nl_arg[s[1]-'0'].i;
199 w = f ? va_arg(*ap, int) : 0;
202 if (w<0) fl|=LEFT_ADJ, w=-w;
203 } else if ((w=getint(&s))<0) goto overflow;
206 if (*s=='.' && s[1]=='*') {
207 if (isdigit(s[2]) && s[3]=='$') {
208 nl_type[s[2]-'0'] = INT;
209 p = nl_arg[s[2]-'0'].i;
212 p = f ? va_arg(*ap, int) : 0;
216 } else if (*s=='.') {
225 /* Format specifier state machine */
228 if (OOB(*s)) goto inval;
230 st=states[st]S(*s++);
234 /* Check validity of argument type (nl/normal) */
236 if (argpos>=0) goto inval;
238 if (argpos>=0) nl_type[argpos]=st, arg=nl_arg[argpos];
239 else if (f) pop_arg(&arg, st, ap);
245 if (ps && (t&15)==3) t&=~32;
250 case BARE: *(int *)arg.p = cnt; break;
251 case LPRE: *(long *)arg.p = cnt; break;
252 case LLPRE: *(long long *)arg.p = cnt; break;
253 case HPRE: *(unsigned short *)arg.p = cnt; break;
254 case HHPRE: *(unsigned char *)arg.p = cnt; break;
255 case ZTPRE: *(size_t *)arg.p = cnt; break;
256 case JPRE: *(uintmax_t *)arg.p = cnt; break;
260 fputwc(btowc(arg.i), f);
269 z = a + wcsnlen(a, p<0 ? INT_MAX : p);
270 if (p<0 && *z) goto overflow;
273 if (!(fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
275 if ((fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
279 arg.p = strerror(errno);
281 if (!arg.p) arg.p = "(null)";
283 for (i=l=0; l<(p<0?INT_MAX:p) && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++);
285 if (p<0 && *bs) goto overflow;
288 if (!(fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
291 i=mbtowc(&wc, bs, MB_LEN_MAX);
295 if ((fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
300 if (xp && p<0) goto overflow;
301 snprintf(charfmt, sizeof charfmt, "%%%s%s%s%s%s*.*%c%c",
302 "#"+!(fl & ALT_FORM),
303 "+"+!(fl & MARK_POS),
304 "-"+!(fl & LEFT_ADJ),
306 "0"+!(fl & ZERO_PAD),
307 sizeprefix[(t|32)-'a'], t);
310 case 'a': case 'e': case 'f': case 'g':
311 l = fprintf(f, charfmt, w, p, arg.f);
313 case 'd': case 'i': case 'o': case 'u': case 'x': case 'p':
314 l = fprintf(f, charfmt, w, p, arg.i);
322 for (i=1; i<=NL_ARGMAX && nl_type[i]; i++)
323 pop_arg(nl_arg+i, nl_type[i], ap);
324 for (; i<=NL_ARGMAX && !nl_type[i]; i++);
325 if (i<=NL_ARGMAX) return -1;
336 int vfwprintf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
339 int nl_type[NL_ARGMAX] = {0};
340 union arg nl_arg[NL_ARGMAX];
344 /* the copy allows passing va_list* even if va_list is an array */
346 if (wprintf_core(0, fmt, &ap2, nl_arg, nl_type) < 0) {
353 olderr = f->flags & F_ERR;
355 ret = wprintf_core(f, fmt, &ap2, nl_arg, nl_type);
356 if (f->flags & F_ERR) ret = -1;