source: asp3_tinet_ecnl_rx/trunk/musl-1.1.18/src/stdio/vfwprintf.c@ 337

Last change on this file since 337 was 337, checked in by coas-nagasima, 6 years ago

ASP3版ECNLを追加
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File size: 8.9 KB
Line 
1#include "stdio_impl.h"
2#include <errno.h>
3#include <ctype.h>
4#include <limits.h>
5#include <string.h>
6#include <stdarg.h>
7#include <stddef.h>
8#include <wchar.h>
9#include <inttypes.h>
10
11/* Convenient bit representation for modifier flags, which all fall
12 * within 31 codepoints of the space character. */
13
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<<'\''-' ')
20
21#define FLAGMASK (ALT_FORM|ZERO_PAD|LEFT_ADJ|PAD_POS|MARK_POS|GROUPED)
22
23/* State machine to accept length modifiers + conversion specifiers.
24 * Result is 0 on failure, or an argument type to pop on success. */
25
26enum {
27 BARE, LPRE, LLPRE, HPRE, HHPRE, BIGLPRE,
28 ZTPRE, JPRE,
29 STOP,
30 PTR, INT, UINT, ULLONG,
31 LONG, ULONG,
32 SHORT, USHORT, CHAR, UCHAR,
33 LLONG, SIZET, IMAX, UMAX, PDIFF, UIPTR,
34 DBL, LDBL,
35 NOARG,
36 MAXSTATE
37};
38
39#define S(x) [(x)-'A']
40
41static const unsigned char states[]['z'-'A'+1] = {
42 { /* 0: bare types */
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,
49 S('m') = NOARG,
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,
56 S('l') = LLPRE,
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,
61 S('n') = PTR,
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,
66 S('n') = PTR,
67 S('h') = HHPRE,
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,
72 S('n') = PTR,
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,
76 S('n') = PTR,
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,
81 S('n') = PTR,
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,
86 S('n') = PTR,
87 }
88};
89
90#define OOB(x) ((unsigned)(x)-'A' > 'z'-'A')
91
92union arg
93{
94 uintmax_t i;
95 long double f;
96 void *p;
97};
98
99static void pop_arg(union arg *arg, int type, va_list *ap)
100{
101 switch (type) {
102 case PTR: arg->p = va_arg(*ap, void *);
103 break; case INT: arg->i = va_arg(*ap, int);
104 break; case UINT: arg->i = va_arg(*ap, unsigned int);
105 break; case LONG: arg->i = va_arg(*ap, long);
106 break; case ULONG: arg->i = va_arg(*ap, unsigned long);
107 break; case ULLONG: arg->i = va_arg(*ap, unsigned long long);
108 break; case SHORT: arg->i = (short)va_arg(*ap, int);
109 break; case USHORT: arg->i = (unsigned short)va_arg(*ap, int);
110 break; case CHAR: arg->i = (signed char)va_arg(*ap, int);
111 break; case UCHAR: arg->i = (unsigned char)va_arg(*ap, int);
112 break; case LLONG: arg->i = va_arg(*ap, long long);
113 break; case SIZET: arg->i = va_arg(*ap, size_t);
114 break; case IMAX: arg->i = va_arg(*ap, intmax_t);
115 break; case UMAX: arg->i = va_arg(*ap, uintmax_t);
116 break; case PDIFF: arg->i = va_arg(*ap, ptrdiff_t);
117 break; case UIPTR: arg->i = (uintptr_t)va_arg(*ap, void *);
118 break; case DBL: arg->f = va_arg(*ap, double);
119 break; case LDBL: arg->f = va_arg(*ap, long double);
120 }
121}
122
123static void out(FILE *f, const wchar_t *s, size_t l)
124{
125 while (l-- && !(f->flags & F_ERR)) fputwc(*s++, f);
126}
127
128static int getint(wchar_t **s) {
129 int i;
130 for (i=0; iswdigit(**s); (*s)++) {
131 if (i > INT_MAX/10U || **s-'0' > INT_MAX-10*i) i = -1;
132 else i = 10*i + (**s-'0');
133 }
134 return i;
135}
136
137static const char sizeprefix['y'-'a'] = {
138['a'-'a']='L', ['e'-'a']='L', ['f'-'a']='L', ['g'-'a']='L',
139['d'-'a']='j', ['i'-'a']='j', ['o'-'a']='j', ['u'-'a']='j', ['x'-'a']='j',
140['p'-'a']='j'
141};
142
143static int wprintf_core(FILE *f, const wchar_t *fmt, va_list *ap, union arg *nl_arg, int *nl_type)
144{
145 wchar_t *a, *z, *s=(wchar_t *)fmt;
146 unsigned l10n=0, fl;
147 int w, p, xp;
148 union arg arg;
149 int argpos;
150 unsigned st, ps;
151 int cnt=0, l=0;
152 int i;
153 int t;
154 char *bs;
155 char charfmt[16];
156 wchar_t wc;
157
158 for (;;) {
159 /* This error is only specified for snprintf, but since it's
160 * unspecified for other forms, do the same. Stop immediately
161 * on overflow; otherwise %n could produce wrong results. */
162 if (l > INT_MAX - cnt) goto overflow;
163
164 /* Update output count, end loop when fmt is exhausted */
165 cnt += l;
166 if (!*s) break;
167
168 /* Handle literal text and %% format specifiers */
169 for (a=s; *s && *s!='%'; s++);
170 for (z=s; s[0]=='%' && s[1]=='%'; z++, s+=2);
171 if (z-a > INT_MAX-cnt) goto overflow;
172 l = z-a;
173 if (f) out(f, a, l);
174 if (l) continue;
175
176 if (iswdigit(s[1]) && s[2]=='$') {
177 l10n=1;
178 argpos = s[1]-'0';
179 s+=3;
180 } else {
181 argpos = -1;
182 s++;
183 }
184
185 /* Read modifier flags */
186 for (fl=0; (unsigned)*s-' '<32 && (FLAGMASK&(1U<<*s-' ')); s++)
187 fl |= 1U<<*s-' ';
188
189 /* Read field width */
190 if (*s=='*') {
191 if (iswdigit(s[1]) && s[2]=='$') {
192 l10n=1;
193 nl_type[s[1]-'0'] = INT;
194 w = nl_arg[s[1]-'0'].i;
195 s+=3;
196 } else if (!l10n) {
197 w = f ? va_arg(*ap, int) : 0;
198 s++;
199 } else goto inval;
200 if (w<0) fl|=LEFT_ADJ, w=-w;
201 } else if ((w=getint(&s))<0) goto overflow;
202
203 /* Read precision */
204 if (*s=='.' && s[1]=='*') {
205 if (isdigit(s[2]) && s[3]=='$') {
206 nl_type[s[2]-'0'] = INT;
207 p = nl_arg[s[2]-'0'].i;
208 s+=4;
209 } else if (!l10n) {
210 p = f ? va_arg(*ap, int) : 0;
211 s+=2;
212 } else goto inval;
213 xp = (p>=0);
214 } else if (*s=='.') {
215 s++;
216 p = getint(&s);
217 xp = 1;
218 } else {
219 p = -1;
220 xp = 0;
221 }
222
223 /* Format specifier state machine */
224 st=0;
225 do {
226 if (OOB(*s)) goto inval;
227 ps=st;
228 st=states[st]S(*s++);
229 } while (st-1<STOP);
230 if (!st) goto inval;
231
232 /* Check validity of argument type (nl/normal) */
233 if (st==NOARG) {
234 if (argpos>=0) goto inval;
235 } else {
236 if (argpos>=0) nl_type[argpos]=st, arg=nl_arg[argpos];
237 else if (f) pop_arg(&arg, st, ap);
238 else return 0;
239 }
240
241 if (!f) continue;
242 t = s[-1];
243 if (ps && (t&15)==3) t&=~32;
244
245 switch (t) {
246 case 'n':
247 switch(ps) {
248 case BARE: *(int *)arg.p = cnt; break;
249 case LPRE: *(long *)arg.p = cnt; break;
250 case LLPRE: *(long long *)arg.p = cnt; break;
251 case HPRE: *(unsigned short *)arg.p = cnt; break;
252 case HHPRE: *(unsigned char *)arg.p = cnt; break;
253 case ZTPRE: *(size_t *)arg.p = cnt; break;
254 case JPRE: *(uintmax_t *)arg.p = cnt; break;
255 }
256 continue;
257 case 'c':
258 fputwc(btowc(arg.i), f);
259 l = 1;
260 continue;
261 case 'C':
262 fputwc(arg.i, f);
263 l = 1;
264 continue;
265 case 'S':
266 a = arg.p;
267 z = a + wcsnlen(a, p<0 ? INT_MAX : p);
268 if (p<0 && *z) goto overflow;
269 p = z-a;
270 if (w<p) w=p;
271 if (!(fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
272 out(f, a, p);
273 if ((fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
274 l=w;
275 continue;
276 case 'm':
277 arg.p = strerror(errno);
278 case 's':
279 if (!arg.p) arg.p = "(null)";
280 bs = arg.p;
281 for (i=l=0; l<(p<0?INT_MAX:p) && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++);
282 if (i<0) return -1;
283 if (p<0 && *bs) goto overflow;
284 p=l;
285 if (w<p) w=p;
286 if (!(fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
287 bs = arg.p;
288 while (l--) {
289 i=mbtowc(&wc, bs, MB_LEN_MAX);
290 bs+=i;
291 fputwc(wc, f);
292 }
293 if ((fl&LEFT_ADJ)) fprintf(f, "%*s", w-p, "");
294 l=w;
295 continue;
296 }
297
298 if (xp && p<0) goto overflow;
299 snprintf(charfmt, sizeof charfmt, "%%%s%s%s%s%s*.*%c%c",
300 "#"+!(fl & ALT_FORM),
301 "+"+!(fl & MARK_POS),
302 "-"+!(fl & LEFT_ADJ),
303 " "+!(fl & PAD_POS),
304 "0"+!(fl & ZERO_PAD),
305 sizeprefix[(t|32)-'a'], t);
306
307 switch (t|32) {
308 case 'a': case 'e': case 'f': case 'g':
309 l = fprintf(f, charfmt, w, p, arg.f);
310 break;
311 case 'd': case 'i': case 'o': case 'u': case 'x': case 'p':
312 l = fprintf(f, charfmt, w, p, arg.i);
313 break;
314 }
315 }
316
317 if (f) return cnt;
318 if (!l10n) return 0;
319
320 for (i=1; i<=NL_ARGMAX && nl_type[i]; i++)
321 pop_arg(nl_arg+i, nl_type[i], ap);
322 for (; i<=NL_ARGMAX && !nl_type[i]; i++);
323 if (i<=NL_ARGMAX) return -1;
324 return 1;
325
326inval:
327 errno = EINVAL;
328 return -1;
329overflow:
330 errno = EOVERFLOW;
331 return -1;
332}
333
334int vfwprintf(FILE *restrict f, const wchar_t *restrict fmt, va_list ap)
335{
336 va_list ap2;
337 int nl_type[NL_ARGMAX] = {0};
338 union arg nl_arg[NL_ARGMAX];
339 int olderr;
340 int ret;
341
342 /* the copy allows passing va_list* even if va_list is an array */
343 va_copy(ap2, ap);
344 if (wprintf_core(0, fmt, &ap2, nl_arg, nl_type) < 0) {
345 va_end(ap2);
346 return -1;
347 }
348
349 FLOCK(f);
350 fwide(f, 1);
351 olderr = f->flags & F_ERR;
352 f->flags &= ~F_ERR;
353 ret = wprintf_core(f, fmt, &ap2, nl_arg, nl_type);
354 if (f->flags & F_ERR) ret = -1;
355 f->flags |= olderr;
356 FUNLOCK(f);
357 va_end(ap2);
358 return ret;
359}
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