1 #include "stdio_impl.h"
10 /* Convenient bit representation for modifier flags, which all fall
11 * within 31 codepoints of the space character. */
13 #define ALT_FORM (1U<<'#'-' ')
14 #define ZERO_PAD (1U<<'0'-' ')
15 #define LEFT_ADJ (1U<<'-'-' ')
16 #define PAD_POS (1U<<' '-' ')
17 #define MARK_POS (1U<<'+'-' ')
18 #define GROUPED (1U<<'\''-' ')
20 #define FLAGMASK (ALT_FORM|ZERO_PAD|LEFT_ADJ|PAD_POS|MARK_POS|GROUPED)
22 #if UINT_MAX == ULONG_MAX
26 #if SIZE_MAX != ULONG_MAX || UINTMAX_MAX != ULLONG_MAX
30 /* State machine to accept length modifiers + conversion specifiers.
31 * Result is 0 on failure, or an argument type to pop on success. */
34 BARE, LPRE, LLPRE, HPRE, HHPRE, BIGLPRE,
37 PTR, INT, UINT, ULLONG,
44 SHORT, USHORT, CHAR, UCHAR,
46 LLONG, SIZET, IMAX, UMAX, PDIFF, UIPTR,
60 #define S(x) [(x)-'A']
62 static const unsigned char states[]['z'-'A'+1] = {
64 S('d') = INT, S('i') = INT,
65 S('o') = UINT, S('u') = UINT, S('x') = UINT, S('X') = UINT,
66 S('e') = DBL, S('f') = DBL, S('g') = DBL, S('a') = DBL,
67 S('E') = DBL, S('F') = DBL, S('G') = DBL, S('A') = DBL,
68 S('c') = CHAR, S('C') = INT,
69 S('s') = PTR, S('S') = PTR, S('p') = UIPTR, S('n') = PTR,
71 S('l') = LPRE, S('h') = HPRE, S('L') = BIGLPRE,
72 S('z') = ZTPRE, S('j') = JPRE, S('t') = ZTPRE,
73 }, { /* 1: l-prefixed */
74 S('d') = LONG, S('i') = LONG,
75 S('o') = ULONG, S('u') = ULONG, S('x') = ULONG, S('X') = ULONG,
76 S('c') = INT, S('s') = PTR, S('n') = PTR,
78 }, { /* 2: ll-prefixed */
79 S('d') = LLONG, S('i') = LLONG,
80 S('o') = ULLONG, S('u') = ULLONG,
81 S('x') = ULLONG, S('X') = ULLONG,
83 }, { /* 3: h-prefixed */
84 S('d') = SHORT, S('i') = SHORT,
85 S('o') = USHORT, S('u') = USHORT,
86 S('x') = USHORT, S('X') = USHORT,
89 }, { /* 4: hh-prefixed */
90 S('d') = CHAR, S('i') = CHAR,
91 S('o') = UCHAR, S('u') = UCHAR,
92 S('x') = UCHAR, S('X') = UCHAR,
94 }, { /* 5: L-prefixed */
95 S('e') = LDBL, S('f') = LDBL, S('g') = LDBL, S('a') = LDBL,
96 S('E') = LDBL, S('F') = LDBL, S('G') = LDBL, S('A') = LDBL,
98 }, { /* 6: z- or t-prefixed (assumed to be same size) */
99 S('d') = PDIFF, S('i') = PDIFF,
100 S('o') = SIZET, S('u') = SIZET,
101 S('x') = SIZET, S('X') = SIZET,
103 }, { /* 7: j-prefixed */
104 S('d') = IMAX, S('i') = IMAX,
105 S('o') = UMAX, S('u') = UMAX,
106 S('x') = UMAX, S('X') = UMAX,
111 #define OOB(x) ((unsigned)(x)-'A' > 'z'-'A')
120 static void pop_arg(union arg *arg, int type, va_list *ap)
122 /* Give the compiler a hint for optimizing the switch. */
123 if ((unsigned)type > MAXSTATE) return;
125 case PTR: arg->p = va_arg(*ap, void *);
126 break; case INT: arg->i = va_arg(*ap, int);
127 break; case UINT: arg->i = va_arg(*ap, unsigned int);
129 break; case LONG: arg->i = va_arg(*ap, long);
130 break; case ULONG: arg->i = va_arg(*ap, unsigned long);
132 break; case ULLONG: arg->i = va_arg(*ap, unsigned long long);
133 break; case SHORT: arg->i = (short)va_arg(*ap, int);
134 break; case USHORT: arg->i = (unsigned short)va_arg(*ap, int);
135 break; case CHAR: arg->i = (signed char)va_arg(*ap, int);
136 break; case UCHAR: arg->i = (unsigned char)va_arg(*ap, int);
138 break; case LLONG: arg->i = va_arg(*ap, long long);
139 break; case SIZET: arg->i = va_arg(*ap, size_t);
140 break; case IMAX: arg->i = va_arg(*ap, intmax_t);
141 break; case UMAX: arg->i = va_arg(*ap, uintmax_t);
142 break; case PDIFF: arg->i = va_arg(*ap, ptrdiff_t);
143 break; case UIPTR: arg->i = (uintptr_t)va_arg(*ap, void *);
145 break; case DBL: arg->f = va_arg(*ap, double);
146 break; case LDBL: arg->f = va_arg(*ap, long double);
150 static void out(FILE *f, const wchar_t *s, size_t l)
152 while (l--) fputwc(*s++, f);
155 static int getint(wchar_t **s) {
157 for (i=0; iswdigit(**s); (*s)++)
158 i = 10*i + (**s-'0');
162 static const char sizeprefix['y'-'a'] = {
163 ['a'-'a']='L', ['e'-'a']='L', ['f'-'a']='L', ['g'-'a']='L',
164 ['d'-'a']='j', ['i'-'a']='j', ['o'-'a']='j', ['u'-'a']='j', ['x'-'a']='j',
168 static int wprintf_core(FILE *f, const wchar_t *fmt, va_list *ap, union arg *nl_arg, int *nl_type)
170 wchar_t *a, *z, *s=(wchar_t *)fmt;
171 unsigned l10n=0, litpct, fl;
184 /* Update output count, end loop when fmt is exhausted */
186 if (l > INT_MAX - cnt) {
187 if (!ferror(f)) errno = EOVERFLOW;
193 /* Handle literal text and %% format specifiers */
194 for (a=s; *s && *s!='%'; s++);
195 litpct = wcsspn(s, L"%")/2; /* Optimize %%%% runs */
202 if (iswdigit(s[1]) && s[2]=='$') {
211 /* Read modifier flags */
212 for (fl=0; (unsigned)*s-' '<32 && (FLAGMASK&(1U<<*s-' ')); s++)
215 /* Read field width */
217 if (iswdigit(s[1]) && s[2]=='$') {
219 nl_type[s[1]-'0'] = INT;
220 w = nl_arg[s[1]-'0'].i;
223 w = f ? va_arg(*ap, int) : 0;
226 if (w<0) fl|=LEFT_ADJ, w=-w;
227 } else if ((w=getint(&s))<0) return -1;
230 if (*s=='.' && s[1]=='*') {
231 if (isdigit(s[2]) && s[3]=='$') {
232 nl_type[s[2]-'0'] = INT;
233 p = nl_arg[s[2]-'0'].i;
236 p = f ? va_arg(*ap, int) : 0;
239 } else if (*s=='.') {
244 /* Format specifier state machine */
247 if (OOB(*s)) return -1;
249 st=states[st]S(*s++);
253 /* Check validity of argument type (nl/normal) */
255 if (argpos>=0) return -1;
257 if (argpos>=0) nl_type[argpos]=st, arg=nl_arg[argpos];
258 else if (f) pop_arg(&arg, st, ap);
264 if (ps && (t&15)==3) t&=~32;
269 case BARE: *(int *)arg.p = cnt; break;
270 case LPRE: *(long *)arg.p = cnt; break;
271 case LLPRE: *(long long *)arg.p = cnt; break;
272 case HPRE: *(unsigned short *)arg.p = cnt; break;
273 case HHPRE: *(unsigned char *)arg.p = cnt; break;
274 case ZTPRE: *(size_t *)arg.p = cnt; break;
275 case JPRE: *(uintmax_t *)arg.p = cnt; break;
279 fputwc(btowc(arg.i), f);
288 z = wmemchr(a, 0, p);
291 if (!(fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, "");
293 if ((fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, "");
298 if (p<0) p = INT_MAX;
299 for (i=l=0; l<p && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++);
303 if (!(fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, "");
306 i=mbtowc(&wc, bs, MB_LEN_MAX);
310 if ((fl&LEFT_ADJ)) fprintf(f, "%.*s", w-p, "");
315 snprintf(charfmt, sizeof charfmt, "%%%s%s%s%s%s*.*%c%c",
316 "#"+!(fl & ALT_FORM),
317 "+"+!(fl & MARK_POS),
318 "-"+!(fl & LEFT_ADJ),
320 "0"+!(fl & ZERO_PAD),
321 sizeprefix[(t|32)-'a'], t);
324 case 'a': case 'e': case 'f': case 'g':
325 l = fprintf(f, charfmt, w, p, arg.f);
327 case 'd': case 'i': case 'o': case 'u': case 'x': case 'p':
328 l = fprintf(f, charfmt, w, p, arg.i);
336 for (i=1; i<=NL_ARGMAX && nl_type[i]; i++)
337 pop_arg(nl_arg+i, nl_type[i], ap);
338 for (; i<=NL_ARGMAX && !nl_type[i]; i++);
339 if (i<=NL_ARGMAX) return -1;
343 int vfwprintf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
346 int nl_type[NL_ARGMAX] = {0};
347 union arg nl_arg[NL_ARGMAX];
350 /* the copy allows passing va_list* even if va_list is an array */
352 if (wprintf_core(0, fmt, &ap2, nl_arg, nl_type) < 0) {
358 f->mode |= f->mode+1;
359 ret = wprintf_core(f, fmt, &ap2, nl_arg, nl_type);