summaryrefslogtreecommitdiffstats
path: root/libc-top-half/musl/src/stdio/vfwprintf.c
diff options
context:
space:
mode:
Diffstat (limited to 'libc-top-half/musl/src/stdio/vfwprintf.c')
-rw-r--r--libc-top-half/musl/src/stdio/vfwprintf.c414
1 files changed, 414 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/stdio/vfwprintf.c b/libc-top-half/musl/src/stdio/vfwprintf.c
new file mode 100644
index 0000000..e660fcc
--- /dev/null
+++ b/libc-top-half/musl/src/stdio/vfwprintf.c
@@ -0,0 +1,414 @@
+#include "stdio_impl.h"
+#include <errno.h>
+#include <ctype.h>
+#include <limits.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <inttypes.h>
+#ifdef __wasilibc_unmodified_upstream // Changes to optimize printf/scanf when long double isn't needed
+#else
+#include "printscan.h"
+#endif
+
+/* 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)
+
+/* 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,
+ LONG, ULONG,
+ SHORT, USHORT, CHAR, UCHAR,
+ LLONG, SIZET, IMAX, UMAX, PDIFF, UIPTR,
+ 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('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') = 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;
+#if !defined(__wasilibc_printscan_no_floating_point)
+#if defined(__wasilibc_printscan_no_long_double)
+ long_double f;
+#else
+ long double f;
+#endif
+#endif
+ void *p;
+};
+
+static void pop_arg(union arg *arg, int type, va_list *ap)
+{
+ 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);
+ break; case LONG: arg->i = va_arg(*ap, long);
+ break; case ULONG: arg->i = va_arg(*ap, unsigned long);
+ 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);
+ 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 *);
+#if defined(__wasilibc_printscan_no_floating_point)
+ break; case DBL:
+ break; case LDBL: floating_point_not_supported();
+#else
+ break; case DBL: arg->f = va_arg(*ap, double);
+#if defined(__wasilibc_printscan_no_long_double)
+ break; case LDBL: long_double_not_supported();
+#else
+ break; case LDBL: arg->f = va_arg(*ap, long double);
+#endif
+#endif
+ }
+}
+
+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)++) {
+ if (i > INT_MAX/10U || **s-'0' > INT_MAX-10*i) i = -1;
+ else 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, fl;
+ int w, p, xp;
+ 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 (;;) {
+ /* This error is only specified for snprintf, but since it's
+ * unspecified for other forms, do the same. Stop immediately
+ * on overflow; otherwise %n could produce wrong results. */
+ if (l > INT_MAX - cnt) goto overflow;
+
+ /* Update output count, end loop when fmt is exhausted */
+ cnt += l;
+ if (!*s) break;
+
+ /* Handle literal text and %% format specifiers */
+ for (a=s; *s && *s!='%'; s++);
+ for (z=s; s[0]=='%' && s[1]=='%'; z++, s+=2);
+ if (z-a > INT_MAX-cnt) goto overflow;
+ 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 goto inval;
+ if (w<0) fl|=LEFT_ADJ, w=-w;
+ } else if ((w=getint(&s))<0) goto overflow;
+
+ /* 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 goto inval;
+ xp = (p>=0);
+ } else if (*s=='.') {
+ s++;
+ p = getint(&s);
+ xp = 1;
+ } else {
+ p = -1;
+ xp = 0;
+ }
+
+ /* Format specifier state machine */
+ st=0;
+ do {
+ if (OOB(*s)) goto inval;
+ ps=st;
+ st=states[st]S(*s++);
+ } while (st-1<STOP);
+ if (!st) goto inval;
+
+ /* Check validity of argument type (nl/normal) */
+ if (st==NOARG) {
+ if (argpos>=0) goto inval;
+ } 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':
+ if (w<1) w=1;
+ if (w>1 && !(fl&LEFT_ADJ)) fprintf(f, "%*s", w-1, "");
+ fputwc(btowc(arg.i), f);
+ if (w>1 && (fl&LEFT_ADJ)) fprintf(f, "%*s", w-1, "");
+ l = w;
+ continue;
+ case 'C':
+ fputwc(arg.i, f);
+ l = 1;
+ continue;
+ case 'S':
+ a = arg.p;
+ z = a + wcsnlen(a, p<0 ? INT_MAX : p);
+ if (p<0 && *z) goto overflow;
+ 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;
+ for (i=l=0; l<(p<0?INT_MAX:p) && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++);
+ if (i<0) return -1;
+ if (p<0 && *bs) goto overflow;
+ 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;
+ }
+
+ if (xp && p<0) goto overflow;
+#if defined(__wasilibc_printscan_no_long_double)
+ // Omit the 'L' modifier for floating-point cases.
+ switch (t|32) {
+ case 'a': case 'e': case 'f': case 'g':
+ snprintf(charfmt, sizeof charfmt, "%%%s%s%s%s%s*.*%c",
+ "#"+!(fl & ALT_FORM),
+ "+"+!(fl & MARK_POS),
+ "-"+!(fl & LEFT_ADJ),
+ " "+!(fl & PAD_POS),
+ "0"+!(fl & ZERO_PAD),
+ t);
+
+ l = fprintf(f, charfmt, w, p, arg.f);
+ break;
+ case 'd': case 'i': case 'o': case 'u': case 'x': case 'p':
+ 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);
+
+ l = fprintf(f, charfmt, w, p, arg.i);
+ break;
+ }
+#else
+ 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) {
+#if !defined(__wasilibc_printscan_no_floating_point)
+ case 'a': case 'e': case 'f': case 'g':
+ l = fprintf(f, charfmt, w, p, arg.f);
+ break;
+#endif
+ case 'd': case 'i': case 'o': case 'u': case 'x': case 'p':
+ l = fprintf(f, charfmt, w, p, arg.i);
+ break;
+ }
+#endif
+ }
+
+ 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;
+
+inval:
+ errno = EINVAL;
+ return -1;
+overflow:
+ errno = EOVERFLOW;
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 15:54:48 +0000