| #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 'm': |
| arg.p = strerror(errno); |
| case 's': |
| if (!arg.p) |
| arg.p = "(null)"; |
| 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) ? " " : "", |
| (fl & ZERO_PAD) ? "0" : "", 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); |
| fwide(f, 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; |
| } |
