1*86d7f5d3SJohn Marino /* vsprintf with automatic memory allocation.
2*86d7f5d3SJohn Marino Copyright (C) 1999, 2002-2005 Free Software Foundation, Inc.
3*86d7f5d3SJohn Marino
4*86d7f5d3SJohn Marino This program is free software; you can redistribute it and/or modify
5*86d7f5d3SJohn Marino it under the terms of the GNU General Public License as published by
6*86d7f5d3SJohn Marino the Free Software Foundation; either version 2, or (at your option)
7*86d7f5d3SJohn Marino any later version.
8*86d7f5d3SJohn Marino
9*86d7f5d3SJohn Marino This program is distributed in the hope that it will be useful,
10*86d7f5d3SJohn Marino but WITHOUT ANY WARRANTY; without even the implied warranty of
11*86d7f5d3SJohn Marino MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12*86d7f5d3SJohn Marino GNU General Public License for more details.
13*86d7f5d3SJohn Marino
14*86d7f5d3SJohn Marino You should have received a copy of the GNU General Public License along
15*86d7f5d3SJohn Marino with this program; if not, write to the Free Software Foundation,
16*86d7f5d3SJohn Marino Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
17*86d7f5d3SJohn Marino
18*86d7f5d3SJohn Marino /* Tell glibc's <stdio.h> to provide a prototype for snprintf().
19*86d7f5d3SJohn Marino This must come before <config.h> because <config.h> may include
20*86d7f5d3SJohn Marino <features.h>, and once <features.h> has been included, it's too late. */
21*86d7f5d3SJohn Marino #ifndef _GNU_SOURCE
22*86d7f5d3SJohn Marino # define _GNU_SOURCE 1
23*86d7f5d3SJohn Marino #endif
24*86d7f5d3SJohn Marino
25*86d7f5d3SJohn Marino #ifdef HAVE_CONFIG_H
26*86d7f5d3SJohn Marino # include <config.h>
27*86d7f5d3SJohn Marino #endif
28*86d7f5d3SJohn Marino #ifndef IN_LIBINTL
29*86d7f5d3SJohn Marino # include <alloca.h>
30*86d7f5d3SJohn Marino #endif
31*86d7f5d3SJohn Marino
32*86d7f5d3SJohn Marino /* Specification. */
33*86d7f5d3SJohn Marino #if WIDE_CHAR_VERSION
34*86d7f5d3SJohn Marino # include "vasnwprintf.h"
35*86d7f5d3SJohn Marino #else
36*86d7f5d3SJohn Marino # include "vasnprintf.h"
37*86d7f5d3SJohn Marino #endif
38*86d7f5d3SJohn Marino
39*86d7f5d3SJohn Marino #include <stdio.h> /* snprintf(), sprintf() */
40*86d7f5d3SJohn Marino #include <stdlib.h> /* abort(), malloc(), realloc(), free() */
41*86d7f5d3SJohn Marino #include <string.h> /* memcpy(), strlen() */
42*86d7f5d3SJohn Marino #include <errno.h> /* errno */
43*86d7f5d3SJohn Marino #include <limits.h> /* CHAR_BIT, INT_MAX */
44*86d7f5d3SJohn Marino #include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */
45*86d7f5d3SJohn Marino #if WIDE_CHAR_VERSION
46*86d7f5d3SJohn Marino # include "wprintf-parse.h"
47*86d7f5d3SJohn Marino #else
48*86d7f5d3SJohn Marino # include "printf-parse.h"
49*86d7f5d3SJohn Marino #endif
50*86d7f5d3SJohn Marino
51*86d7f5d3SJohn Marino /* Checked size_t computations. */
52*86d7f5d3SJohn Marino #include "xsize.h"
53*86d7f5d3SJohn Marino
54*86d7f5d3SJohn Marino /* Some systems, like OSF/1 4.0 and Woe32, don't have EOVERFLOW. */
55*86d7f5d3SJohn Marino #ifndef EOVERFLOW
56*86d7f5d3SJohn Marino # define EOVERFLOW E2BIG
57*86d7f5d3SJohn Marino #endif
58*86d7f5d3SJohn Marino
59*86d7f5d3SJohn Marino #ifdef HAVE_WCHAR_T
60*86d7f5d3SJohn Marino # ifdef HAVE_WCSLEN
61*86d7f5d3SJohn Marino # define local_wcslen wcslen
62*86d7f5d3SJohn Marino # else
63*86d7f5d3SJohn Marino /* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid
64*86d7f5d3SJohn Marino a dependency towards this library, here is a local substitute.
65*86d7f5d3SJohn Marino Define this substitute only once, even if this file is included
66*86d7f5d3SJohn Marino twice in the same compilation unit. */
67*86d7f5d3SJohn Marino # ifndef local_wcslen_defined
68*86d7f5d3SJohn Marino # define local_wcslen_defined 1
69*86d7f5d3SJohn Marino static size_t
local_wcslen(const wchar_t * s)70*86d7f5d3SJohn Marino local_wcslen (const wchar_t *s)
71*86d7f5d3SJohn Marino {
72*86d7f5d3SJohn Marino const wchar_t *ptr;
73*86d7f5d3SJohn Marino
74*86d7f5d3SJohn Marino for (ptr = s; *ptr != (wchar_t) 0; ptr++)
75*86d7f5d3SJohn Marino ;
76*86d7f5d3SJohn Marino return ptr - s;
77*86d7f5d3SJohn Marino }
78*86d7f5d3SJohn Marino # endif
79*86d7f5d3SJohn Marino # endif
80*86d7f5d3SJohn Marino #endif
81*86d7f5d3SJohn Marino
82*86d7f5d3SJohn Marino #if WIDE_CHAR_VERSION
83*86d7f5d3SJohn Marino # define VASNPRINTF vasnwprintf
84*86d7f5d3SJohn Marino # define CHAR_T wchar_t
85*86d7f5d3SJohn Marino # define DIRECTIVE wchar_t_directive
86*86d7f5d3SJohn Marino # define DIRECTIVES wchar_t_directives
87*86d7f5d3SJohn Marino # define PRINTF_PARSE wprintf_parse
88*86d7f5d3SJohn Marino # define USE_SNPRINTF 1
89*86d7f5d3SJohn Marino # if HAVE_DECL__SNWPRINTF
90*86d7f5d3SJohn Marino /* On Windows, the function swprintf() has a different signature than
91*86d7f5d3SJohn Marino on Unix; we use the _snwprintf() function instead. */
92*86d7f5d3SJohn Marino # define SNPRINTF _snwprintf
93*86d7f5d3SJohn Marino # else
94*86d7f5d3SJohn Marino /* Unix. */
95*86d7f5d3SJohn Marino # define SNPRINTF swprintf
96*86d7f5d3SJohn Marino # endif
97*86d7f5d3SJohn Marino #else
98*86d7f5d3SJohn Marino # define VASNPRINTF vasnprintf
99*86d7f5d3SJohn Marino # define CHAR_T char
100*86d7f5d3SJohn Marino # define DIRECTIVE char_directive
101*86d7f5d3SJohn Marino # define DIRECTIVES char_directives
102*86d7f5d3SJohn Marino # define PRINTF_PARSE printf_parse
103*86d7f5d3SJohn Marino # define USE_SNPRINTF (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF)
104*86d7f5d3SJohn Marino # if HAVE_DECL__SNPRINTF
105*86d7f5d3SJohn Marino /* Windows. */
106*86d7f5d3SJohn Marino # define SNPRINTF _snprintf
107*86d7f5d3SJohn Marino # else
108*86d7f5d3SJohn Marino /* Unix. */
109*86d7f5d3SJohn Marino # define SNPRINTF snprintf
110*86d7f5d3SJohn Marino # endif
111*86d7f5d3SJohn Marino #endif
112*86d7f5d3SJohn Marino
113*86d7f5d3SJohn Marino CHAR_T *
VASNPRINTF(CHAR_T * resultbuf,size_t * lengthp,const CHAR_T * format,va_list args)114*86d7f5d3SJohn Marino VASNPRINTF (CHAR_T *resultbuf, size_t *lengthp, const CHAR_T *format, va_list args)
115*86d7f5d3SJohn Marino {
116*86d7f5d3SJohn Marino DIRECTIVES d;
117*86d7f5d3SJohn Marino arguments a;
118*86d7f5d3SJohn Marino
119*86d7f5d3SJohn Marino if (PRINTF_PARSE (format, &d, &a) < 0)
120*86d7f5d3SJohn Marino {
121*86d7f5d3SJohn Marino errno = EINVAL;
122*86d7f5d3SJohn Marino return NULL;
123*86d7f5d3SJohn Marino }
124*86d7f5d3SJohn Marino
125*86d7f5d3SJohn Marino #define CLEANUP() \
126*86d7f5d3SJohn Marino free (d.dir); \
127*86d7f5d3SJohn Marino if (a.arg) \
128*86d7f5d3SJohn Marino free (a.arg);
129*86d7f5d3SJohn Marino
130*86d7f5d3SJohn Marino if (printf_fetchargs (args, &a) < 0)
131*86d7f5d3SJohn Marino {
132*86d7f5d3SJohn Marino CLEANUP ();
133*86d7f5d3SJohn Marino errno = EINVAL;
134*86d7f5d3SJohn Marino return NULL;
135*86d7f5d3SJohn Marino }
136*86d7f5d3SJohn Marino
137*86d7f5d3SJohn Marino {
138*86d7f5d3SJohn Marino size_t buf_neededlength;
139*86d7f5d3SJohn Marino CHAR_T *buf;
140*86d7f5d3SJohn Marino CHAR_T *buf_malloced;
141*86d7f5d3SJohn Marino const CHAR_T *cp;
142*86d7f5d3SJohn Marino size_t i;
143*86d7f5d3SJohn Marino DIRECTIVE *dp;
144*86d7f5d3SJohn Marino /* Output string accumulator. */
145*86d7f5d3SJohn Marino CHAR_T *result;
146*86d7f5d3SJohn Marino size_t allocated;
147*86d7f5d3SJohn Marino size_t length;
148*86d7f5d3SJohn Marino
149*86d7f5d3SJohn Marino /* Allocate a small buffer that will hold a directive passed to
150*86d7f5d3SJohn Marino sprintf or snprintf. */
151*86d7f5d3SJohn Marino buf_neededlength =
152*86d7f5d3SJohn Marino xsum4 (7, d.max_width_length, d.max_precision_length, 6);
153*86d7f5d3SJohn Marino #if HAVE_ALLOCA
154*86d7f5d3SJohn Marino if (buf_neededlength < 4000 / sizeof (CHAR_T))
155*86d7f5d3SJohn Marino {
156*86d7f5d3SJohn Marino buf = (CHAR_T *) alloca (buf_neededlength * sizeof (CHAR_T));
157*86d7f5d3SJohn Marino buf_malloced = NULL;
158*86d7f5d3SJohn Marino }
159*86d7f5d3SJohn Marino else
160*86d7f5d3SJohn Marino #endif
161*86d7f5d3SJohn Marino {
162*86d7f5d3SJohn Marino size_t buf_memsize = xtimes (buf_neededlength, sizeof (CHAR_T));
163*86d7f5d3SJohn Marino if (size_overflow_p (buf_memsize))
164*86d7f5d3SJohn Marino goto out_of_memory_1;
165*86d7f5d3SJohn Marino buf = (CHAR_T *) malloc (buf_memsize);
166*86d7f5d3SJohn Marino if (buf == NULL)
167*86d7f5d3SJohn Marino goto out_of_memory_1;
168*86d7f5d3SJohn Marino buf_malloced = buf;
169*86d7f5d3SJohn Marino }
170*86d7f5d3SJohn Marino
171*86d7f5d3SJohn Marino if (resultbuf != NULL)
172*86d7f5d3SJohn Marino {
173*86d7f5d3SJohn Marino result = resultbuf;
174*86d7f5d3SJohn Marino allocated = *lengthp;
175*86d7f5d3SJohn Marino }
176*86d7f5d3SJohn Marino else
177*86d7f5d3SJohn Marino {
178*86d7f5d3SJohn Marino result = NULL;
179*86d7f5d3SJohn Marino allocated = 0;
180*86d7f5d3SJohn Marino }
181*86d7f5d3SJohn Marino length = 0;
182*86d7f5d3SJohn Marino /* Invariants:
183*86d7f5d3SJohn Marino result is either == resultbuf or == NULL or malloc-allocated.
184*86d7f5d3SJohn Marino If length > 0, then result != NULL. */
185*86d7f5d3SJohn Marino
186*86d7f5d3SJohn Marino /* Ensures that allocated >= needed. Aborts through a jump to
187*86d7f5d3SJohn Marino out_of_memory if needed is SIZE_MAX or otherwise too big. */
188*86d7f5d3SJohn Marino #define ENSURE_ALLOCATION(needed) \
189*86d7f5d3SJohn Marino if ((needed) > allocated) \
190*86d7f5d3SJohn Marino { \
191*86d7f5d3SJohn Marino size_t memory_size; \
192*86d7f5d3SJohn Marino CHAR_T *memory; \
193*86d7f5d3SJohn Marino \
194*86d7f5d3SJohn Marino allocated = (allocated > 0 ? xtimes (allocated, 2) : 12); \
195*86d7f5d3SJohn Marino if ((needed) > allocated) \
196*86d7f5d3SJohn Marino allocated = (needed); \
197*86d7f5d3SJohn Marino memory_size = xtimes (allocated, sizeof (CHAR_T)); \
198*86d7f5d3SJohn Marino if (size_overflow_p (memory_size)) \
199*86d7f5d3SJohn Marino goto out_of_memory; \
200*86d7f5d3SJohn Marino if (result == resultbuf || result == NULL) \
201*86d7f5d3SJohn Marino memory = (CHAR_T *) malloc (memory_size); \
202*86d7f5d3SJohn Marino else \
203*86d7f5d3SJohn Marino memory = (CHAR_T *) realloc (result, memory_size); \
204*86d7f5d3SJohn Marino if (memory == NULL) \
205*86d7f5d3SJohn Marino goto out_of_memory; \
206*86d7f5d3SJohn Marino if (result == resultbuf && length > 0) \
207*86d7f5d3SJohn Marino memcpy (memory, result, length * sizeof (CHAR_T)); \
208*86d7f5d3SJohn Marino result = memory; \
209*86d7f5d3SJohn Marino }
210*86d7f5d3SJohn Marino
211*86d7f5d3SJohn Marino for (cp = format, i = 0, dp = &d.dir[0]; ; cp = dp->dir_end, i++, dp++)
212*86d7f5d3SJohn Marino {
213*86d7f5d3SJohn Marino if (cp != dp->dir_start)
214*86d7f5d3SJohn Marino {
215*86d7f5d3SJohn Marino size_t n = dp->dir_start - cp;
216*86d7f5d3SJohn Marino size_t augmented_length = xsum (length, n);
217*86d7f5d3SJohn Marino
218*86d7f5d3SJohn Marino ENSURE_ALLOCATION (augmented_length);
219*86d7f5d3SJohn Marino memcpy (result + length, cp, n * sizeof (CHAR_T));
220*86d7f5d3SJohn Marino length = augmented_length;
221*86d7f5d3SJohn Marino }
222*86d7f5d3SJohn Marino if (i == d.count)
223*86d7f5d3SJohn Marino break;
224*86d7f5d3SJohn Marino
225*86d7f5d3SJohn Marino /* Execute a single directive. */
226*86d7f5d3SJohn Marino if (dp->conversion == '%')
227*86d7f5d3SJohn Marino {
228*86d7f5d3SJohn Marino size_t augmented_length;
229*86d7f5d3SJohn Marino
230*86d7f5d3SJohn Marino if (!(dp->arg_index == ARG_NONE))
231*86d7f5d3SJohn Marino abort ();
232*86d7f5d3SJohn Marino augmented_length = xsum (length, 1);
233*86d7f5d3SJohn Marino ENSURE_ALLOCATION (augmented_length);
234*86d7f5d3SJohn Marino result[length] = '%';
235*86d7f5d3SJohn Marino length = augmented_length;
236*86d7f5d3SJohn Marino }
237*86d7f5d3SJohn Marino else
238*86d7f5d3SJohn Marino {
239*86d7f5d3SJohn Marino if (!(dp->arg_index != ARG_NONE))
240*86d7f5d3SJohn Marino abort ();
241*86d7f5d3SJohn Marino
242*86d7f5d3SJohn Marino if (dp->conversion == 'n')
243*86d7f5d3SJohn Marino {
244*86d7f5d3SJohn Marino switch (a.arg[dp->arg_index].type)
245*86d7f5d3SJohn Marino {
246*86d7f5d3SJohn Marino case TYPE_COUNT_SCHAR_POINTER:
247*86d7f5d3SJohn Marino *a.arg[dp->arg_index].a.a_count_schar_pointer = length;
248*86d7f5d3SJohn Marino break;
249*86d7f5d3SJohn Marino case TYPE_COUNT_SHORT_POINTER:
250*86d7f5d3SJohn Marino *a.arg[dp->arg_index].a.a_count_short_pointer = length;
251*86d7f5d3SJohn Marino break;
252*86d7f5d3SJohn Marino case TYPE_COUNT_INT_POINTER:
253*86d7f5d3SJohn Marino *a.arg[dp->arg_index].a.a_count_int_pointer = length;
254*86d7f5d3SJohn Marino break;
255*86d7f5d3SJohn Marino case TYPE_COUNT_LONGINT_POINTER:
256*86d7f5d3SJohn Marino *a.arg[dp->arg_index].a.a_count_longint_pointer = length;
257*86d7f5d3SJohn Marino break;
258*86d7f5d3SJohn Marino #ifdef HAVE_LONG_LONG
259*86d7f5d3SJohn Marino case TYPE_COUNT_LONGLONGINT_POINTER:
260*86d7f5d3SJohn Marino *a.arg[dp->arg_index].a.a_count_longlongint_pointer = length;
261*86d7f5d3SJohn Marino break;
262*86d7f5d3SJohn Marino #endif
263*86d7f5d3SJohn Marino default:
264*86d7f5d3SJohn Marino abort ();
265*86d7f5d3SJohn Marino }
266*86d7f5d3SJohn Marino }
267*86d7f5d3SJohn Marino else
268*86d7f5d3SJohn Marino {
269*86d7f5d3SJohn Marino arg_type type = a.arg[dp->arg_index].type;
270*86d7f5d3SJohn Marino CHAR_T *p;
271*86d7f5d3SJohn Marino unsigned int prefix_count;
272*86d7f5d3SJohn Marino int prefixes[2];
273*86d7f5d3SJohn Marino #if !USE_SNPRINTF
274*86d7f5d3SJohn Marino size_t tmp_length;
275*86d7f5d3SJohn Marino CHAR_T tmpbuf[700];
276*86d7f5d3SJohn Marino CHAR_T *tmp;
277*86d7f5d3SJohn Marino
278*86d7f5d3SJohn Marino /* Allocate a temporary buffer of sufficient size for calling
279*86d7f5d3SJohn Marino sprintf. */
280*86d7f5d3SJohn Marino {
281*86d7f5d3SJohn Marino size_t width;
282*86d7f5d3SJohn Marino size_t precision;
283*86d7f5d3SJohn Marino
284*86d7f5d3SJohn Marino width = 0;
285*86d7f5d3SJohn Marino if (dp->width_start != dp->width_end)
286*86d7f5d3SJohn Marino {
287*86d7f5d3SJohn Marino if (dp->width_arg_index != ARG_NONE)
288*86d7f5d3SJohn Marino {
289*86d7f5d3SJohn Marino int arg;
290*86d7f5d3SJohn Marino
291*86d7f5d3SJohn Marino if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
292*86d7f5d3SJohn Marino abort ();
293*86d7f5d3SJohn Marino arg = a.arg[dp->width_arg_index].a.a_int;
294*86d7f5d3SJohn Marino width = (arg < 0 ? (unsigned int) (-arg) : arg);
295*86d7f5d3SJohn Marino }
296*86d7f5d3SJohn Marino else
297*86d7f5d3SJohn Marino {
298*86d7f5d3SJohn Marino const CHAR_T *digitp = dp->width_start;
299*86d7f5d3SJohn Marino
300*86d7f5d3SJohn Marino do
301*86d7f5d3SJohn Marino width = xsum (xtimes (width, 10), *digitp++ - '0');
302*86d7f5d3SJohn Marino while (digitp != dp->width_end);
303*86d7f5d3SJohn Marino }
304*86d7f5d3SJohn Marino }
305*86d7f5d3SJohn Marino
306*86d7f5d3SJohn Marino precision = 6;
307*86d7f5d3SJohn Marino if (dp->precision_start != dp->precision_end)
308*86d7f5d3SJohn Marino {
309*86d7f5d3SJohn Marino if (dp->precision_arg_index != ARG_NONE)
310*86d7f5d3SJohn Marino {
311*86d7f5d3SJohn Marino int arg;
312*86d7f5d3SJohn Marino
313*86d7f5d3SJohn Marino if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
314*86d7f5d3SJohn Marino abort ();
315*86d7f5d3SJohn Marino arg = a.arg[dp->precision_arg_index].a.a_int;
316*86d7f5d3SJohn Marino precision = (arg < 0 ? 0 : arg);
317*86d7f5d3SJohn Marino }
318*86d7f5d3SJohn Marino else
319*86d7f5d3SJohn Marino {
320*86d7f5d3SJohn Marino const CHAR_T *digitp = dp->precision_start + 1;
321*86d7f5d3SJohn Marino
322*86d7f5d3SJohn Marino precision = 0;
323*86d7f5d3SJohn Marino while (digitp != dp->precision_end)
324*86d7f5d3SJohn Marino precision = xsum (xtimes (precision, 10), *digitp++ - '0');
325*86d7f5d3SJohn Marino }
326*86d7f5d3SJohn Marino }
327*86d7f5d3SJohn Marino
328*86d7f5d3SJohn Marino switch (dp->conversion)
329*86d7f5d3SJohn Marino {
330*86d7f5d3SJohn Marino
331*86d7f5d3SJohn Marino case 'd': case 'i': case 'u':
332*86d7f5d3SJohn Marino # ifdef HAVE_LONG_LONG
333*86d7f5d3SJohn Marino if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
334*86d7f5d3SJohn Marino tmp_length =
335*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
336*86d7f5d3SJohn Marino * 0.30103 /* binary -> decimal */
337*86d7f5d3SJohn Marino * 2 /* estimate for FLAG_GROUP */
338*86d7f5d3SJohn Marino )
339*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
340*86d7f5d3SJohn Marino + 1; /* account for leading sign */
341*86d7f5d3SJohn Marino else
342*86d7f5d3SJohn Marino # endif
343*86d7f5d3SJohn Marino if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
344*86d7f5d3SJohn Marino tmp_length =
345*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned long) * CHAR_BIT
346*86d7f5d3SJohn Marino * 0.30103 /* binary -> decimal */
347*86d7f5d3SJohn Marino * 2 /* estimate for FLAG_GROUP */
348*86d7f5d3SJohn Marino )
349*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
350*86d7f5d3SJohn Marino + 1; /* account for leading sign */
351*86d7f5d3SJohn Marino else
352*86d7f5d3SJohn Marino tmp_length =
353*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned int) * CHAR_BIT
354*86d7f5d3SJohn Marino * 0.30103 /* binary -> decimal */
355*86d7f5d3SJohn Marino * 2 /* estimate for FLAG_GROUP */
356*86d7f5d3SJohn Marino )
357*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
358*86d7f5d3SJohn Marino + 1; /* account for leading sign */
359*86d7f5d3SJohn Marino break;
360*86d7f5d3SJohn Marino
361*86d7f5d3SJohn Marino case 'o':
362*86d7f5d3SJohn Marino # ifdef HAVE_LONG_LONG
363*86d7f5d3SJohn Marino if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
364*86d7f5d3SJohn Marino tmp_length =
365*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
366*86d7f5d3SJohn Marino * 0.333334 /* binary -> octal */
367*86d7f5d3SJohn Marino )
368*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
369*86d7f5d3SJohn Marino + 1; /* account for leading sign */
370*86d7f5d3SJohn Marino else
371*86d7f5d3SJohn Marino # endif
372*86d7f5d3SJohn Marino if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
373*86d7f5d3SJohn Marino tmp_length =
374*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned long) * CHAR_BIT
375*86d7f5d3SJohn Marino * 0.333334 /* binary -> octal */
376*86d7f5d3SJohn Marino )
377*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
378*86d7f5d3SJohn Marino + 1; /* account for leading sign */
379*86d7f5d3SJohn Marino else
380*86d7f5d3SJohn Marino tmp_length =
381*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned int) * CHAR_BIT
382*86d7f5d3SJohn Marino * 0.333334 /* binary -> octal */
383*86d7f5d3SJohn Marino )
384*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
385*86d7f5d3SJohn Marino + 1; /* account for leading sign */
386*86d7f5d3SJohn Marino break;
387*86d7f5d3SJohn Marino
388*86d7f5d3SJohn Marino case 'x': case 'X':
389*86d7f5d3SJohn Marino # ifdef HAVE_LONG_LONG
390*86d7f5d3SJohn Marino if (type == TYPE_LONGLONGINT || type == TYPE_ULONGLONGINT)
391*86d7f5d3SJohn Marino tmp_length =
392*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned long long) * CHAR_BIT
393*86d7f5d3SJohn Marino * 0.25 /* binary -> hexadecimal */
394*86d7f5d3SJohn Marino )
395*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
396*86d7f5d3SJohn Marino + 2; /* account for leading sign or alternate form */
397*86d7f5d3SJohn Marino else
398*86d7f5d3SJohn Marino # endif
399*86d7f5d3SJohn Marino if (type == TYPE_LONGINT || type == TYPE_ULONGINT)
400*86d7f5d3SJohn Marino tmp_length =
401*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned long) * CHAR_BIT
402*86d7f5d3SJohn Marino * 0.25 /* binary -> hexadecimal */
403*86d7f5d3SJohn Marino )
404*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
405*86d7f5d3SJohn Marino + 2; /* account for leading sign or alternate form */
406*86d7f5d3SJohn Marino else
407*86d7f5d3SJohn Marino tmp_length =
408*86d7f5d3SJohn Marino (unsigned int) (sizeof (unsigned int) * CHAR_BIT
409*86d7f5d3SJohn Marino * 0.25 /* binary -> hexadecimal */
410*86d7f5d3SJohn Marino )
411*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
412*86d7f5d3SJohn Marino + 2; /* account for leading sign or alternate form */
413*86d7f5d3SJohn Marino break;
414*86d7f5d3SJohn Marino
415*86d7f5d3SJohn Marino case 'f': case 'F':
416*86d7f5d3SJohn Marino # ifdef HAVE_LONG_DOUBLE
417*86d7f5d3SJohn Marino if (type == TYPE_LONGDOUBLE)
418*86d7f5d3SJohn Marino tmp_length =
419*86d7f5d3SJohn Marino (unsigned int) (LDBL_MAX_EXP
420*86d7f5d3SJohn Marino * 0.30103 /* binary -> decimal */
421*86d7f5d3SJohn Marino * 2 /* estimate for FLAG_GROUP */
422*86d7f5d3SJohn Marino )
423*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
424*86d7f5d3SJohn Marino + 10; /* sign, decimal point etc. */
425*86d7f5d3SJohn Marino else
426*86d7f5d3SJohn Marino # endif
427*86d7f5d3SJohn Marino tmp_length =
428*86d7f5d3SJohn Marino (unsigned int) (DBL_MAX_EXP
429*86d7f5d3SJohn Marino * 0.30103 /* binary -> decimal */
430*86d7f5d3SJohn Marino * 2 /* estimate for FLAG_GROUP */
431*86d7f5d3SJohn Marino )
432*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
433*86d7f5d3SJohn Marino + 10; /* sign, decimal point etc. */
434*86d7f5d3SJohn Marino tmp_length = xsum (tmp_length, precision);
435*86d7f5d3SJohn Marino break;
436*86d7f5d3SJohn Marino
437*86d7f5d3SJohn Marino case 'e': case 'E': case 'g': case 'G':
438*86d7f5d3SJohn Marino case 'a': case 'A':
439*86d7f5d3SJohn Marino tmp_length =
440*86d7f5d3SJohn Marino 12; /* sign, decimal point, exponent etc. */
441*86d7f5d3SJohn Marino tmp_length = xsum (tmp_length, precision);
442*86d7f5d3SJohn Marino break;
443*86d7f5d3SJohn Marino
444*86d7f5d3SJohn Marino case 'c':
445*86d7f5d3SJohn Marino # if defined HAVE_WINT_T && !WIDE_CHAR_VERSION
446*86d7f5d3SJohn Marino if (type == TYPE_WIDE_CHAR)
447*86d7f5d3SJohn Marino tmp_length = MB_CUR_MAX;
448*86d7f5d3SJohn Marino else
449*86d7f5d3SJohn Marino # endif
450*86d7f5d3SJohn Marino tmp_length = 1;
451*86d7f5d3SJohn Marino break;
452*86d7f5d3SJohn Marino
453*86d7f5d3SJohn Marino case 's':
454*86d7f5d3SJohn Marino # ifdef HAVE_WCHAR_T
455*86d7f5d3SJohn Marino if (type == TYPE_WIDE_STRING)
456*86d7f5d3SJohn Marino {
457*86d7f5d3SJohn Marino tmp_length =
458*86d7f5d3SJohn Marino local_wcslen (a.arg[dp->arg_index].a.a_wide_string);
459*86d7f5d3SJohn Marino
460*86d7f5d3SJohn Marino # if !WIDE_CHAR_VERSION
461*86d7f5d3SJohn Marino tmp_length = xtimes (tmp_length, MB_CUR_MAX);
462*86d7f5d3SJohn Marino # endif
463*86d7f5d3SJohn Marino }
464*86d7f5d3SJohn Marino else
465*86d7f5d3SJohn Marino # endif
466*86d7f5d3SJohn Marino tmp_length = strlen (a.arg[dp->arg_index].a.a_string);
467*86d7f5d3SJohn Marino break;
468*86d7f5d3SJohn Marino
469*86d7f5d3SJohn Marino case 'p':
470*86d7f5d3SJohn Marino tmp_length =
471*86d7f5d3SJohn Marino (unsigned int) (sizeof (void *) * CHAR_BIT
472*86d7f5d3SJohn Marino * 0.25 /* binary -> hexadecimal */
473*86d7f5d3SJohn Marino )
474*86d7f5d3SJohn Marino + 1 /* turn floor into ceil */
475*86d7f5d3SJohn Marino + 2; /* account for leading 0x */
476*86d7f5d3SJohn Marino break;
477*86d7f5d3SJohn Marino
478*86d7f5d3SJohn Marino default:
479*86d7f5d3SJohn Marino abort ();
480*86d7f5d3SJohn Marino }
481*86d7f5d3SJohn Marino
482*86d7f5d3SJohn Marino if (tmp_length < width)
483*86d7f5d3SJohn Marino tmp_length = width;
484*86d7f5d3SJohn Marino
485*86d7f5d3SJohn Marino tmp_length = xsum (tmp_length, 1); /* account for trailing NUL */
486*86d7f5d3SJohn Marino }
487*86d7f5d3SJohn Marino
488*86d7f5d3SJohn Marino if (tmp_length <= sizeof (tmpbuf) / sizeof (CHAR_T))
489*86d7f5d3SJohn Marino tmp = tmpbuf;
490*86d7f5d3SJohn Marino else
491*86d7f5d3SJohn Marino {
492*86d7f5d3SJohn Marino size_t tmp_memsize = xtimes (tmp_length, sizeof (CHAR_T));
493*86d7f5d3SJohn Marino
494*86d7f5d3SJohn Marino if (size_overflow_p (tmp_memsize))
495*86d7f5d3SJohn Marino /* Overflow, would lead to out of memory. */
496*86d7f5d3SJohn Marino goto out_of_memory;
497*86d7f5d3SJohn Marino tmp = (CHAR_T *) malloc (tmp_memsize);
498*86d7f5d3SJohn Marino if (tmp == NULL)
499*86d7f5d3SJohn Marino /* Out of memory. */
500*86d7f5d3SJohn Marino goto out_of_memory;
501*86d7f5d3SJohn Marino }
502*86d7f5d3SJohn Marino #endif
503*86d7f5d3SJohn Marino
504*86d7f5d3SJohn Marino /* Construct the format string for calling snprintf or
505*86d7f5d3SJohn Marino sprintf. */
506*86d7f5d3SJohn Marino p = buf;
507*86d7f5d3SJohn Marino *p++ = '%';
508*86d7f5d3SJohn Marino if (dp->flags & FLAG_GROUP)
509*86d7f5d3SJohn Marino *p++ = '\'';
510*86d7f5d3SJohn Marino if (dp->flags & FLAG_LEFT)
511*86d7f5d3SJohn Marino *p++ = '-';
512*86d7f5d3SJohn Marino if (dp->flags & FLAG_SHOWSIGN)
513*86d7f5d3SJohn Marino *p++ = '+';
514*86d7f5d3SJohn Marino if (dp->flags & FLAG_SPACE)
515*86d7f5d3SJohn Marino *p++ = ' ';
516*86d7f5d3SJohn Marino if (dp->flags & FLAG_ALT)
517*86d7f5d3SJohn Marino *p++ = '#';
518*86d7f5d3SJohn Marino if (dp->flags & FLAG_ZERO)
519*86d7f5d3SJohn Marino *p++ = '0';
520*86d7f5d3SJohn Marino if (dp->width_start != dp->width_end)
521*86d7f5d3SJohn Marino {
522*86d7f5d3SJohn Marino size_t n = dp->width_end - dp->width_start;
523*86d7f5d3SJohn Marino memcpy (p, dp->width_start, n * sizeof (CHAR_T));
524*86d7f5d3SJohn Marino p += n;
525*86d7f5d3SJohn Marino }
526*86d7f5d3SJohn Marino if (dp->precision_start != dp->precision_end)
527*86d7f5d3SJohn Marino {
528*86d7f5d3SJohn Marino size_t n = dp->precision_end - dp->precision_start;
529*86d7f5d3SJohn Marino memcpy (p, dp->precision_start, n * sizeof (CHAR_T));
530*86d7f5d3SJohn Marino p += n;
531*86d7f5d3SJohn Marino }
532*86d7f5d3SJohn Marino
533*86d7f5d3SJohn Marino switch (type)
534*86d7f5d3SJohn Marino {
535*86d7f5d3SJohn Marino #ifdef HAVE_LONG_LONG
536*86d7f5d3SJohn Marino case TYPE_LONGLONGINT:
537*86d7f5d3SJohn Marino case TYPE_ULONGLONGINT:
538*86d7f5d3SJohn Marino *p++ = 'l';
539*86d7f5d3SJohn Marino /*FALLTHROUGH*/
540*86d7f5d3SJohn Marino #endif
541*86d7f5d3SJohn Marino case TYPE_LONGINT:
542*86d7f5d3SJohn Marino case TYPE_ULONGINT:
543*86d7f5d3SJohn Marino #ifdef HAVE_WINT_T
544*86d7f5d3SJohn Marino case TYPE_WIDE_CHAR:
545*86d7f5d3SJohn Marino #endif
546*86d7f5d3SJohn Marino #ifdef HAVE_WCHAR_T
547*86d7f5d3SJohn Marino case TYPE_WIDE_STRING:
548*86d7f5d3SJohn Marino #endif
549*86d7f5d3SJohn Marino *p++ = 'l';
550*86d7f5d3SJohn Marino break;
551*86d7f5d3SJohn Marino #ifdef HAVE_LONG_DOUBLE
552*86d7f5d3SJohn Marino case TYPE_LONGDOUBLE:
553*86d7f5d3SJohn Marino *p++ = 'L';
554*86d7f5d3SJohn Marino break;
555*86d7f5d3SJohn Marino #endif
556*86d7f5d3SJohn Marino default:
557*86d7f5d3SJohn Marino break;
558*86d7f5d3SJohn Marino }
559*86d7f5d3SJohn Marino *p = dp->conversion;
560*86d7f5d3SJohn Marino #if USE_SNPRINTF
561*86d7f5d3SJohn Marino p[1] = '%';
562*86d7f5d3SJohn Marino p[2] = 'n';
563*86d7f5d3SJohn Marino p[3] = '\0';
564*86d7f5d3SJohn Marino #else
565*86d7f5d3SJohn Marino p[1] = '\0';
566*86d7f5d3SJohn Marino #endif
567*86d7f5d3SJohn Marino
568*86d7f5d3SJohn Marino /* Construct the arguments for calling snprintf or sprintf. */
569*86d7f5d3SJohn Marino prefix_count = 0;
570*86d7f5d3SJohn Marino if (dp->width_arg_index != ARG_NONE)
571*86d7f5d3SJohn Marino {
572*86d7f5d3SJohn Marino if (!(a.arg[dp->width_arg_index].type == TYPE_INT))
573*86d7f5d3SJohn Marino abort ();
574*86d7f5d3SJohn Marino prefixes[prefix_count++] = a.arg[dp->width_arg_index].a.a_int;
575*86d7f5d3SJohn Marino }
576*86d7f5d3SJohn Marino if (dp->precision_arg_index != ARG_NONE)
577*86d7f5d3SJohn Marino {
578*86d7f5d3SJohn Marino if (!(a.arg[dp->precision_arg_index].type == TYPE_INT))
579*86d7f5d3SJohn Marino abort ();
580*86d7f5d3SJohn Marino prefixes[prefix_count++] = a.arg[dp->precision_arg_index].a.a_int;
581*86d7f5d3SJohn Marino }
582*86d7f5d3SJohn Marino
583*86d7f5d3SJohn Marino #if USE_SNPRINTF
584*86d7f5d3SJohn Marino /* Prepare checking whether snprintf returns the count
585*86d7f5d3SJohn Marino via %n. */
586*86d7f5d3SJohn Marino ENSURE_ALLOCATION (xsum (length, 1));
587*86d7f5d3SJohn Marino result[length] = '\0';
588*86d7f5d3SJohn Marino #endif
589*86d7f5d3SJohn Marino
590*86d7f5d3SJohn Marino for (;;)
591*86d7f5d3SJohn Marino {
592*86d7f5d3SJohn Marino size_t maxlen;
593*86d7f5d3SJohn Marino int count;
594*86d7f5d3SJohn Marino int retcount;
595*86d7f5d3SJohn Marino
596*86d7f5d3SJohn Marino maxlen = allocated - length;
597*86d7f5d3SJohn Marino count = -1;
598*86d7f5d3SJohn Marino retcount = 0;
599*86d7f5d3SJohn Marino
600*86d7f5d3SJohn Marino #if USE_SNPRINTF
601*86d7f5d3SJohn Marino # define SNPRINTF_BUF(arg) \
602*86d7f5d3SJohn Marino switch (prefix_count) \
603*86d7f5d3SJohn Marino { \
604*86d7f5d3SJohn Marino case 0: \
605*86d7f5d3SJohn Marino retcount = SNPRINTF (result + length, maxlen, buf, \
606*86d7f5d3SJohn Marino arg, &count); \
607*86d7f5d3SJohn Marino break; \
608*86d7f5d3SJohn Marino case 1: \
609*86d7f5d3SJohn Marino retcount = SNPRINTF (result + length, maxlen, buf, \
610*86d7f5d3SJohn Marino prefixes[0], arg, &count); \
611*86d7f5d3SJohn Marino break; \
612*86d7f5d3SJohn Marino case 2: \
613*86d7f5d3SJohn Marino retcount = SNPRINTF (result + length, maxlen, buf, \
614*86d7f5d3SJohn Marino prefixes[0], prefixes[1], arg, \
615*86d7f5d3SJohn Marino &count); \
616*86d7f5d3SJohn Marino break; \
617*86d7f5d3SJohn Marino default: \
618*86d7f5d3SJohn Marino abort (); \
619*86d7f5d3SJohn Marino }
620*86d7f5d3SJohn Marino #else
621*86d7f5d3SJohn Marino # define SNPRINTF_BUF(arg) \
622*86d7f5d3SJohn Marino switch (prefix_count) \
623*86d7f5d3SJohn Marino { \
624*86d7f5d3SJohn Marino case 0: \
625*86d7f5d3SJohn Marino count = sprintf (tmp, buf, arg); \
626*86d7f5d3SJohn Marino break; \
627*86d7f5d3SJohn Marino case 1: \
628*86d7f5d3SJohn Marino count = sprintf (tmp, buf, prefixes[0], arg); \
629*86d7f5d3SJohn Marino break; \
630*86d7f5d3SJohn Marino case 2: \
631*86d7f5d3SJohn Marino count = sprintf (tmp, buf, prefixes[0], prefixes[1],\
632*86d7f5d3SJohn Marino arg); \
633*86d7f5d3SJohn Marino break; \
634*86d7f5d3SJohn Marino default: \
635*86d7f5d3SJohn Marino abort (); \
636*86d7f5d3SJohn Marino }
637*86d7f5d3SJohn Marino #endif
638*86d7f5d3SJohn Marino
639*86d7f5d3SJohn Marino switch (type)
640*86d7f5d3SJohn Marino {
641*86d7f5d3SJohn Marino case TYPE_SCHAR:
642*86d7f5d3SJohn Marino {
643*86d7f5d3SJohn Marino int arg = a.arg[dp->arg_index].a.a_schar;
644*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
645*86d7f5d3SJohn Marino }
646*86d7f5d3SJohn Marino break;
647*86d7f5d3SJohn Marino case TYPE_UCHAR:
648*86d7f5d3SJohn Marino {
649*86d7f5d3SJohn Marino unsigned int arg = a.arg[dp->arg_index].a.a_uchar;
650*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
651*86d7f5d3SJohn Marino }
652*86d7f5d3SJohn Marino break;
653*86d7f5d3SJohn Marino case TYPE_SHORT:
654*86d7f5d3SJohn Marino {
655*86d7f5d3SJohn Marino int arg = a.arg[dp->arg_index].a.a_short;
656*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
657*86d7f5d3SJohn Marino }
658*86d7f5d3SJohn Marino break;
659*86d7f5d3SJohn Marino case TYPE_USHORT:
660*86d7f5d3SJohn Marino {
661*86d7f5d3SJohn Marino unsigned int arg = a.arg[dp->arg_index].a.a_ushort;
662*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
663*86d7f5d3SJohn Marino }
664*86d7f5d3SJohn Marino break;
665*86d7f5d3SJohn Marino case TYPE_INT:
666*86d7f5d3SJohn Marino {
667*86d7f5d3SJohn Marino int arg = a.arg[dp->arg_index].a.a_int;
668*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
669*86d7f5d3SJohn Marino }
670*86d7f5d3SJohn Marino break;
671*86d7f5d3SJohn Marino case TYPE_UINT:
672*86d7f5d3SJohn Marino {
673*86d7f5d3SJohn Marino unsigned int arg = a.arg[dp->arg_index].a.a_uint;
674*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
675*86d7f5d3SJohn Marino }
676*86d7f5d3SJohn Marino break;
677*86d7f5d3SJohn Marino case TYPE_LONGINT:
678*86d7f5d3SJohn Marino {
679*86d7f5d3SJohn Marino long int arg = a.arg[dp->arg_index].a.a_longint;
680*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
681*86d7f5d3SJohn Marino }
682*86d7f5d3SJohn Marino break;
683*86d7f5d3SJohn Marino case TYPE_ULONGINT:
684*86d7f5d3SJohn Marino {
685*86d7f5d3SJohn Marino unsigned long int arg = a.arg[dp->arg_index].a.a_ulongint;
686*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
687*86d7f5d3SJohn Marino }
688*86d7f5d3SJohn Marino break;
689*86d7f5d3SJohn Marino #ifdef HAVE_LONG_LONG
690*86d7f5d3SJohn Marino case TYPE_LONGLONGINT:
691*86d7f5d3SJohn Marino {
692*86d7f5d3SJohn Marino long long int arg = a.arg[dp->arg_index].a.a_longlongint;
693*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
694*86d7f5d3SJohn Marino }
695*86d7f5d3SJohn Marino break;
696*86d7f5d3SJohn Marino case TYPE_ULONGLONGINT:
697*86d7f5d3SJohn Marino {
698*86d7f5d3SJohn Marino unsigned long long int arg = a.arg[dp->arg_index].a.a_ulonglongint;
699*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
700*86d7f5d3SJohn Marino }
701*86d7f5d3SJohn Marino break;
702*86d7f5d3SJohn Marino #endif
703*86d7f5d3SJohn Marino case TYPE_DOUBLE:
704*86d7f5d3SJohn Marino {
705*86d7f5d3SJohn Marino double arg = a.arg[dp->arg_index].a.a_double;
706*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
707*86d7f5d3SJohn Marino }
708*86d7f5d3SJohn Marino break;
709*86d7f5d3SJohn Marino #ifdef HAVE_LONG_DOUBLE
710*86d7f5d3SJohn Marino case TYPE_LONGDOUBLE:
711*86d7f5d3SJohn Marino {
712*86d7f5d3SJohn Marino long double arg = a.arg[dp->arg_index].a.a_longdouble;
713*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
714*86d7f5d3SJohn Marino }
715*86d7f5d3SJohn Marino break;
716*86d7f5d3SJohn Marino #endif
717*86d7f5d3SJohn Marino case TYPE_CHAR:
718*86d7f5d3SJohn Marino {
719*86d7f5d3SJohn Marino int arg = a.arg[dp->arg_index].a.a_char;
720*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
721*86d7f5d3SJohn Marino }
722*86d7f5d3SJohn Marino break;
723*86d7f5d3SJohn Marino #ifdef HAVE_WINT_T
724*86d7f5d3SJohn Marino case TYPE_WIDE_CHAR:
725*86d7f5d3SJohn Marino {
726*86d7f5d3SJohn Marino wint_t arg = a.arg[dp->arg_index].a.a_wide_char;
727*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
728*86d7f5d3SJohn Marino }
729*86d7f5d3SJohn Marino break;
730*86d7f5d3SJohn Marino #endif
731*86d7f5d3SJohn Marino case TYPE_STRING:
732*86d7f5d3SJohn Marino {
733*86d7f5d3SJohn Marino const char *arg = a.arg[dp->arg_index].a.a_string;
734*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
735*86d7f5d3SJohn Marino }
736*86d7f5d3SJohn Marino break;
737*86d7f5d3SJohn Marino #ifdef HAVE_WCHAR_T
738*86d7f5d3SJohn Marino case TYPE_WIDE_STRING:
739*86d7f5d3SJohn Marino {
740*86d7f5d3SJohn Marino const wchar_t *arg = a.arg[dp->arg_index].a.a_wide_string;
741*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
742*86d7f5d3SJohn Marino }
743*86d7f5d3SJohn Marino break;
744*86d7f5d3SJohn Marino #endif
745*86d7f5d3SJohn Marino case TYPE_POINTER:
746*86d7f5d3SJohn Marino {
747*86d7f5d3SJohn Marino void *arg = a.arg[dp->arg_index].a.a_pointer;
748*86d7f5d3SJohn Marino SNPRINTF_BUF (arg);
749*86d7f5d3SJohn Marino }
750*86d7f5d3SJohn Marino break;
751*86d7f5d3SJohn Marino default:
752*86d7f5d3SJohn Marino abort ();
753*86d7f5d3SJohn Marino }
754*86d7f5d3SJohn Marino
755*86d7f5d3SJohn Marino #if USE_SNPRINTF
756*86d7f5d3SJohn Marino /* Portability: Not all implementations of snprintf()
757*86d7f5d3SJohn Marino are ISO C 99 compliant. Determine the number of
758*86d7f5d3SJohn Marino bytes that snprintf() has produced or would have
759*86d7f5d3SJohn Marino produced. */
760*86d7f5d3SJohn Marino if (count >= 0)
761*86d7f5d3SJohn Marino {
762*86d7f5d3SJohn Marino /* Verify that snprintf() has NUL-terminated its
763*86d7f5d3SJohn Marino result. */
764*86d7f5d3SJohn Marino if (count < maxlen && result[length + count] != '\0')
765*86d7f5d3SJohn Marino abort ();
766*86d7f5d3SJohn Marino /* Portability hack. */
767*86d7f5d3SJohn Marino if (retcount > count)
768*86d7f5d3SJohn Marino count = retcount;
769*86d7f5d3SJohn Marino }
770*86d7f5d3SJohn Marino else
771*86d7f5d3SJohn Marino {
772*86d7f5d3SJohn Marino /* snprintf() doesn't understand the '%n'
773*86d7f5d3SJohn Marino directive. */
774*86d7f5d3SJohn Marino if (p[1] != '\0')
775*86d7f5d3SJohn Marino {
776*86d7f5d3SJohn Marino /* Don't use the '%n' directive; instead, look
777*86d7f5d3SJohn Marino at the snprintf() return value. */
778*86d7f5d3SJohn Marino p[1] = '\0';
779*86d7f5d3SJohn Marino continue;
780*86d7f5d3SJohn Marino }
781*86d7f5d3SJohn Marino else
782*86d7f5d3SJohn Marino {
783*86d7f5d3SJohn Marino /* Look at the snprintf() return value. */
784*86d7f5d3SJohn Marino if (retcount < 0)
785*86d7f5d3SJohn Marino {
786*86d7f5d3SJohn Marino /* HP-UX 10.20 snprintf() is doubly deficient:
787*86d7f5d3SJohn Marino It doesn't understand the '%n' directive,
788*86d7f5d3SJohn Marino *and* it returns -1 (rather than the length
789*86d7f5d3SJohn Marino that would have been required) when the
790*86d7f5d3SJohn Marino buffer is too small. */
791*86d7f5d3SJohn Marino size_t bigger_need =
792*86d7f5d3SJohn Marino xsum (xtimes (allocated, 2), 12);
793*86d7f5d3SJohn Marino ENSURE_ALLOCATION (bigger_need);
794*86d7f5d3SJohn Marino continue;
795*86d7f5d3SJohn Marino }
796*86d7f5d3SJohn Marino else
797*86d7f5d3SJohn Marino count = retcount;
798*86d7f5d3SJohn Marino }
799*86d7f5d3SJohn Marino }
800*86d7f5d3SJohn Marino #endif
801*86d7f5d3SJohn Marino
802*86d7f5d3SJohn Marino /* Attempt to handle failure. */
803*86d7f5d3SJohn Marino if (count < 0)
804*86d7f5d3SJohn Marino {
805*86d7f5d3SJohn Marino if (!(result == resultbuf || result == NULL))
806*86d7f5d3SJohn Marino free (result);
807*86d7f5d3SJohn Marino if (buf_malloced != NULL)
808*86d7f5d3SJohn Marino free (buf_malloced);
809*86d7f5d3SJohn Marino CLEANUP ();
810*86d7f5d3SJohn Marino errno = EINVAL;
811*86d7f5d3SJohn Marino return NULL;
812*86d7f5d3SJohn Marino }
813*86d7f5d3SJohn Marino
814*86d7f5d3SJohn Marino #if !USE_SNPRINTF
815*86d7f5d3SJohn Marino if (count >= tmp_length)
816*86d7f5d3SJohn Marino /* tmp_length was incorrectly calculated - fix the
817*86d7f5d3SJohn Marino code above! */
818*86d7f5d3SJohn Marino abort ();
819*86d7f5d3SJohn Marino #endif
820*86d7f5d3SJohn Marino
821*86d7f5d3SJohn Marino /* Make room for the result. */
822*86d7f5d3SJohn Marino if (count >= maxlen)
823*86d7f5d3SJohn Marino {
824*86d7f5d3SJohn Marino /* Need at least count bytes. But allocate
825*86d7f5d3SJohn Marino proportionally, to avoid looping eternally if
826*86d7f5d3SJohn Marino snprintf() reports a too small count. */
827*86d7f5d3SJohn Marino size_t n =
828*86d7f5d3SJohn Marino xmax (xsum (length, count), xtimes (allocated, 2));
829*86d7f5d3SJohn Marino
830*86d7f5d3SJohn Marino ENSURE_ALLOCATION (n);
831*86d7f5d3SJohn Marino #if USE_SNPRINTF
832*86d7f5d3SJohn Marino continue;
833*86d7f5d3SJohn Marino #endif
834*86d7f5d3SJohn Marino }
835*86d7f5d3SJohn Marino
836*86d7f5d3SJohn Marino #if USE_SNPRINTF
837*86d7f5d3SJohn Marino /* The snprintf() result did fit. */
838*86d7f5d3SJohn Marino #else
839*86d7f5d3SJohn Marino /* Append the sprintf() result. */
840*86d7f5d3SJohn Marino memcpy (result + length, tmp, count * sizeof (CHAR_T));
841*86d7f5d3SJohn Marino if (tmp != tmpbuf)
842*86d7f5d3SJohn Marino free (tmp);
843*86d7f5d3SJohn Marino #endif
844*86d7f5d3SJohn Marino
845*86d7f5d3SJohn Marino length += count;
846*86d7f5d3SJohn Marino break;
847*86d7f5d3SJohn Marino }
848*86d7f5d3SJohn Marino }
849*86d7f5d3SJohn Marino }
850*86d7f5d3SJohn Marino }
851*86d7f5d3SJohn Marino
852*86d7f5d3SJohn Marino /* Add the final NUL. */
853*86d7f5d3SJohn Marino ENSURE_ALLOCATION (xsum (length, 1));
854*86d7f5d3SJohn Marino result[length] = '\0';
855*86d7f5d3SJohn Marino
856*86d7f5d3SJohn Marino if (result != resultbuf && length + 1 < allocated)
857*86d7f5d3SJohn Marino {
858*86d7f5d3SJohn Marino /* Shrink the allocated memory if possible. */
859*86d7f5d3SJohn Marino CHAR_T *memory;
860*86d7f5d3SJohn Marino
861*86d7f5d3SJohn Marino memory = (CHAR_T *) realloc (result, (length + 1) * sizeof (CHAR_T));
862*86d7f5d3SJohn Marino if (memory != NULL)
863*86d7f5d3SJohn Marino result = memory;
864*86d7f5d3SJohn Marino }
865*86d7f5d3SJohn Marino
866*86d7f5d3SJohn Marino if (buf_malloced != NULL)
867*86d7f5d3SJohn Marino free (buf_malloced);
868*86d7f5d3SJohn Marino CLEANUP ();
869*86d7f5d3SJohn Marino *lengthp = length;
870*86d7f5d3SJohn Marino if (length > INT_MAX)
871*86d7f5d3SJohn Marino goto length_overflow;
872*86d7f5d3SJohn Marino return result;
873*86d7f5d3SJohn Marino
874*86d7f5d3SJohn Marino length_overflow:
875*86d7f5d3SJohn Marino /* We could produce such a big string, but its length doesn't fit into
876*86d7f5d3SJohn Marino an 'int'. POSIX says that snprintf() fails with errno = EOVERFLOW in
877*86d7f5d3SJohn Marino this case. */
878*86d7f5d3SJohn Marino if (result != resultbuf)
879*86d7f5d3SJohn Marino free (result);
880*86d7f5d3SJohn Marino errno = EOVERFLOW;
881*86d7f5d3SJohn Marino return NULL;
882*86d7f5d3SJohn Marino
883*86d7f5d3SJohn Marino out_of_memory:
884*86d7f5d3SJohn Marino if (!(result == resultbuf || result == NULL))
885*86d7f5d3SJohn Marino free (result);
886*86d7f5d3SJohn Marino if (buf_malloced != NULL)
887*86d7f5d3SJohn Marino free (buf_malloced);
888*86d7f5d3SJohn Marino out_of_memory_1:
889*86d7f5d3SJohn Marino CLEANUP ();
890*86d7f5d3SJohn Marino errno = ENOMEM;
891*86d7f5d3SJohn Marino return NULL;
892*86d7f5d3SJohn Marino }
893*86d7f5d3SJohn Marino }
894*86d7f5d3SJohn Marino
895*86d7f5d3SJohn Marino #undef SNPRINTF
896*86d7f5d3SJohn Marino #undef USE_SNPRINTF
897*86d7f5d3SJohn Marino #undef PRINTF_PARSE
898*86d7f5d3SJohn Marino #undef DIRECTIVES
899*86d7f5d3SJohn Marino #undef DIRECTIVE
900*86d7f5d3SJohn Marino #undef CHAR_T
901*86d7f5d3SJohn Marino #undef VASNPRINTF
902