2 * Copyright (c) 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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32 * @(#)vfprintf.c 8.1 (Berkeley) 6/4/93
33 * $FreeBSD: src/lib/libc/stdio/printf-pos.c,v 1.6 2009/03/02 04:07:58 das Exp $
37 * This is the code responsible for handling positional arguments
38 * (%m$ and %m$.n$) for vfprintf() and vfwprintf().
41 #include "namespace.h"
42 #include <sys/types.h>
52 #include "un-namespace.h"
53 #include "printflocal.h"
56 * Type ids for argument type table.
59 T_UNUSED, TP_SHORT, T_INT, T_U_INT, TP_INT,
60 T_LONG, T_U_LONG, TP_LONG, T_LLONG, T_U_LLONG, TP_LLONG,
61 T_PTRDIFFT, TP_PTRDIFFT, T_SSIZET, T_SIZET, TP_SSIZET,
62 T_INTMAXT, T_UINTMAXT, TP_INTMAXT, TP_VOID, TP_CHAR, TP_SCHAR,
63 T_DOUBLE, T_LONG_DOUBLE, T_WINT, TP_WCHAR
66 /* An expandable array of types. */
68 enum typeid *table; /* table of types */
69 enum typeid stattable[STATIC_ARG_TBL_SIZE];
70 int tablesize; /* current size of type table */
71 int tablemax; /* largest used index in table */
72 int nextarg; /* 1-based argument index */
75 static int __grow_type_table(struct typetable *);
76 static void build_arg_table (struct typetable *, va_list, union arg **);
79 * Initialize a struct typetable.
82 inittypes(struct typetable *types)
86 types->table = types->stattable;
87 types->tablesize = STATIC_ARG_TBL_SIZE;
90 for (n = 0; n < STATIC_ARG_TBL_SIZE; n++)
91 types->table[n] = T_UNUSED;
95 * struct typetable destructor.
98 freetypes(struct typetable *types)
101 if (types->table != types->stattable)
106 * Ensure that there is space to add a new argument type to the type table.
107 * Expand the table if necessary. Returns 0 on success.
110 _ensurespace(struct typetable *types)
113 if (types->nextarg >= types->tablesize) {
114 if (__grow_type_table(types))
117 if (types->nextarg > types->tablemax)
118 types->tablemax = types->nextarg;
123 * Add an argument type to the table, expanding if necessary.
124 * Returns 0 on success.
127 addtype(struct typetable *types, enum typeid type)
130 if (_ensurespace(types))
132 types->table[types->nextarg++] = type;
137 addsarg(struct typetable *types, int flags)
140 if (_ensurespace(types))
143 types->table[types->nextarg++] = T_INTMAXT;
144 else if (flags & SIZET)
145 types->table[types->nextarg++] = T_SSIZET;
146 else if (flags & PTRDIFFT)
147 types->table[types->nextarg++] = T_PTRDIFFT;
148 else if (flags & LLONGINT)
149 types->table[types->nextarg++] = T_LLONG;
150 else if (flags & LONGINT)
151 types->table[types->nextarg++] = T_LONG;
153 types->table[types->nextarg++] = T_INT;
158 adduarg(struct typetable *types, int flags)
161 if (_ensurespace(types))
164 types->table[types->nextarg++] = T_UINTMAXT;
165 else if (flags & SIZET)
166 types->table[types->nextarg++] = T_SIZET;
167 else if (flags & PTRDIFFT)
168 types->table[types->nextarg++] = T_SIZET;
169 else if (flags & LLONGINT)
170 types->table[types->nextarg++] = T_U_LLONG;
171 else if (flags & LONGINT)
172 types->table[types->nextarg++] = T_U_LONG;
174 types->table[types->nextarg++] = T_U_INT;
179 * Add * arguments to the type array.
182 addaster(struct typetable *types, char **fmtp)
189 while (is_digit(*cp)) {
190 n2 = 10 * n2 + to_digit(*cp);
194 int hold = types->nextarg;
196 if (addtype(types, T_INT))
198 types->nextarg = hold;
201 if (addtype(types, T_INT))
208 addwaster(struct typetable *types, wchar_t **fmtp)
215 while (is_digit(*cp)) {
216 n2 = 10 * n2 + to_digit(*cp);
220 int hold = types->nextarg;
222 if (addtype(types, T_INT))
224 types->nextarg = hold;
227 if (addtype(types, T_INT))
234 * Find all arguments when a positional parameter is encountered. Returns a
235 * table, indexed by argument number, of pointers to each arguments. The
236 * initial argument table should be an array of STATIC_ARG_TBL_SIZE entries.
237 * It will be replaces with a malloc-ed one if it overflows.
238 * Returns 0 on success. On failure, returns nonzero and sets errno.
241 __find_arguments(const char *fmt0, va_list ap, union arg **argtable)
243 char *fmt; /* format string */
244 int ch; /* character from fmt */
245 int n; /* handy integer (short term usage) */
247 int flags; /* flags as above */
248 int width; /* width from format (%8d), or 0 */
249 struct typetable types; /* table of types */
251 fmt = __DECONST(char *, fmt0);
256 * Scan the format for conversions (`%' character).
259 while ((ch = *fmt) != '\0' && ch != '%')
263 fmt++; /* skip over '%' */
269 reswitch: switch (ch) {
274 if ((error = addaster(&types, &fmt)))
282 if ((ch = *fmt++) == '*') {
283 if ((error = addaster(&types, &fmt)))
287 while (is_digit(ch)) {
293 case '1': case '2': case '3': case '4':
294 case '5': case '6': case '7': case '8': case '9':
297 n = 10 * n + to_digit(ch);
299 } while (is_digit(ch));
306 #ifndef NO_FLOATING_POINT
312 if (flags & SHORTINT) {
322 if (flags & LONGINT) {
329 flags |= LLONGINT; /* not necessarily */
341 error = addtype(&types,
342 (flags & LONGINT) ? T_WINT : T_INT);
351 if ((error = addsarg(&types, flags)))
354 #ifndef NO_FLOATING_POINT
362 error = addtype(&types,
363 (flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE);
367 #endif /* !NO_FLOATING_POINT */
370 error = addtype(&types, TP_INTMAXT);
371 else if (flags & PTRDIFFT)
372 error = addtype(&types, TP_PTRDIFFT);
373 else if (flags & SIZET)
374 error = addtype(&types, TP_SSIZET);
375 else if (flags & LLONGINT)
376 error = addtype(&types, TP_LLONG);
377 else if (flags & LONGINT)
378 error = addtype(&types, TP_LONG);
379 else if (flags & SHORTINT)
380 error = addtype(&types, TP_SHORT);
381 else if (flags & CHARINT)
382 error = addtype(&types, TP_SCHAR);
384 error = addtype(&types, TP_INT);
387 continue; /* no output */
392 if ((error = adduarg(&types, flags)))
396 if ((error = addtype(&types, TP_VOID)))
403 error = addtype(&types,
404 (flags & LONGINT) ? TP_WCHAR : TP_CHAR);
414 if ((error = adduarg(&types, flags)))
417 default: /* "%?" prints ?, unless ? is NUL */
424 build_arg_table(&types, ap, argtable);
427 return (error || *argtable == NULL);
430 /* wchar version of __find_arguments. */
432 __find_warguments(const wchar_t *fmt0, va_list ap, union arg **argtable)
434 wchar_t *fmt; /* format string */
435 wchar_t ch; /* character from fmt */
436 int n; /* handy integer (short term usage) */
438 int flags; /* flags as above */
439 int width; /* width from format (%8d), or 0 */
440 struct typetable types; /* table of types */
442 fmt = __DECONST(wchar_t *, fmt0);
447 * Scan the format for conversions (`%' character).
450 while ((ch = *fmt) != '\0' && ch != '%')
454 fmt++; /* skip over '%' */
460 reswitch: switch (ch) {
465 if ((error = addwaster(&types, &fmt)))
473 if ((ch = *fmt++) == '*') {
474 if ((error = addwaster(&types, &fmt)))
478 while (is_digit(ch)) {
484 case '1': case '2': case '3': case '4':
485 case '5': case '6': case '7': case '8': case '9':
488 n = 10 * n + to_digit(ch);
490 } while (is_digit(ch));
497 #ifndef NO_FLOATING_POINT
503 if (flags & SHORTINT) {
513 if (flags & LONGINT) {
520 flags |= LLONGINT; /* not necessarily */
532 error = addtype(&types,
533 (flags & LONGINT) ? T_WINT : T_INT);
542 if ((error = addsarg(&types, flags)))
545 #ifndef NO_FLOATING_POINT
553 error = addtype(&types,
554 (flags & LONGDBL) ? T_LONG_DOUBLE : T_DOUBLE);
558 #endif /* !NO_FLOATING_POINT */
561 error = addtype(&types, TP_INTMAXT);
562 else if (flags & PTRDIFFT)
563 error = addtype(&types, TP_PTRDIFFT);
564 else if (flags & SIZET)
565 error = addtype(&types, TP_SSIZET);
566 else if (flags & LLONGINT)
567 error = addtype(&types, TP_LLONG);
568 else if (flags & LONGINT)
569 error = addtype(&types, TP_LONG);
570 else if (flags & SHORTINT)
571 error = addtype(&types, TP_SHORT);
572 else if (flags & CHARINT)
573 error = addtype(&types, TP_SCHAR);
575 error = addtype(&types, TP_INT);
578 continue; /* no output */
583 if ((error = adduarg(&types, flags)))
587 if ((error = addtype(&types, TP_VOID)))
594 error = addtype(&types,
595 (flags & LONGINT) ? TP_WCHAR : TP_CHAR);
605 if ((error = adduarg(&types, flags)))
608 default: /* "%?" prints ?, unless ? is NUL */
615 build_arg_table(&types, ap, argtable);
618 return (error || *argtable == NULL);
622 * Increase the size of the type table. Returns 0 on success.
625 __grow_type_table(struct typetable *types)
627 enum typeid *const oldtable = types->table;
628 const int oldsize = types->tablesize;
629 enum typeid *newtable;
630 int n, newsize = oldsize * 2;
632 if (newsize < types->nextarg + 1)
633 newsize = types->nextarg + 1;
634 if (oldsize == STATIC_ARG_TBL_SIZE) {
635 if ((newtable = malloc(newsize * sizeof(enum typeid))) == NULL)
637 bcopy(oldtable, newtable, oldsize * sizeof(enum typeid));
639 newtable = realloc(oldtable, newsize * sizeof(enum typeid));
640 if (newtable == NULL)
643 for (n = oldsize; n < newsize; n++)
644 newtable[n] = T_UNUSED;
646 types->table = newtable;
647 types->tablesize = newsize;
653 * Build the argument table from the completed type table.
654 * On malloc failure, *argtable is set to NULL.
657 build_arg_table(struct typetable *types, va_list ap, union arg **argtable)
661 if (types->tablemax >= STATIC_ARG_TBL_SIZE) {
662 *argtable = (union arg *)
663 malloc (sizeof (union arg) * (types->tablemax + 1));
664 if (*argtable == NULL)
668 (*argtable) [0].intarg = 0;
669 for (n = 1; n <= types->tablemax; n++) {
670 switch (types->table[n]) {
671 case T_UNUSED: /* whoops! */
672 (*argtable) [n].intarg = va_arg(ap, int);
675 (*argtable) [n].pschararg = va_arg(ap, signed char *);
678 (*argtable) [n].pshortarg = va_arg(ap, short *);
681 (*argtable) [n].intarg = va_arg(ap, int);
684 (*argtable) [n].uintarg = va_arg(ap, unsigned int);
687 (*argtable) [n].pintarg = va_arg(ap, int *);
690 (*argtable) [n].longarg = va_arg(ap, long);
693 (*argtable) [n].ulongarg = va_arg(ap, unsigned long);
696 (*argtable) [n].plongarg = va_arg(ap, long *);
699 (*argtable) [n].longlongarg = va_arg(ap, long long);
702 (*argtable) [n].ulonglongarg = va_arg(ap, unsigned long long);
705 (*argtable) [n].plonglongarg = va_arg(ap, long long *);
708 (*argtable) [n].ptrdiffarg = va_arg(ap, ptrdiff_t);
711 (*argtable) [n].pptrdiffarg = va_arg(ap, ptrdiff_t *);
714 (*argtable) [n].sizearg = va_arg(ap, size_t);
717 (*argtable) [n].sizearg = va_arg(ap, ssize_t);
720 (*argtable) [n].pssizearg = va_arg(ap, ssize_t *);
723 (*argtable) [n].intmaxarg = va_arg(ap, intmax_t);
726 (*argtable) [n].uintmaxarg = va_arg(ap, uintmax_t);
729 (*argtable) [n].pintmaxarg = va_arg(ap, intmax_t *);
732 #ifndef NO_FLOATING_POINT
733 (*argtable) [n].doublearg = va_arg(ap, double);
737 #ifndef NO_FLOATING_POINT
738 (*argtable) [n].longdoublearg = va_arg(ap, long double);
742 (*argtable) [n].pchararg = va_arg(ap, char *);
745 (*argtable) [n].pvoidarg = va_arg(ap, void *);
748 (*argtable) [n].wintarg = va_arg(ap, wint_t);
751 (*argtable) [n].pwchararg = va_arg(ap, wchar_t *);