2 * Copyright (c) 2005 Poul-Henning Kamp
3 * Copyright (c) 1990, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
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33 * $FreeBSD: src/lib/libc/stdio/xprintf_str.c,v 1.1 2005/12/16 18:56:38 phk Exp $
36 #include "namespace.h"
44 #include "un-namespace.h"
48 * Convert a wide character string argument for the %ls format to a multibyte
49 * string representation. If not -1, prec specifies the maximum number of
50 * bytes to output, and also means that we can't assume that the wide char.
51 * string ends is null-terminated.
54 __wcsconv(wchar_t *wcsarg, int prec)
56 static const mbstate_t initial;
63 /* Allocate space for the maximum number of bytes we could output. */
67 nbytes = wcsrtombs(NULL, (const wchar_t **)&p, 0, &mbs);
68 if (nbytes == (size_t)-1)
72 * Optimisation: if the output precision is small enough,
73 * just allocate enough memory for the maximum instead of
74 * scanning the string.
83 clen = wcrtomb(buf, *p++, &mbs);
84 if (clen == 0 || clen == (size_t)-1 ||
85 (int)(nbytes + clen) > prec)
91 if ((convbuf = malloc(nbytes + 1)) == NULL)
94 /* Fill the output buffer. */
97 if ((nbytes = wcsrtombs(convbuf, (const wchar_t **)&p,
98 nbytes, &mbs)) == (size_t)-1) {
102 convbuf[nbytes] = '\0';
107 /* 's' ---------------------------------------------------------------*/
110 __printf_arginfo_str(const struct printf_info *pi, size_t n, int *argt)
114 if (pi->is_long || pi->spec == 'C')
115 argt[0] = PA_WSTRING;
122 __printf_render_str(struct __printf_io *io, const struct printf_info *pi,
123 const void *const *arg)
130 if (pi->is_long || pi->spec == 'S') {
131 wcp = *((wint_t **)arg[0]);
133 return (__printf_out(io, pi, "(null)", 6));
134 convbuf = __wcsconv(wcp, pi->prec);
137 l = __printf_out(io, pi, convbuf, strlen(convbuf));
141 p = *((char **)arg[0]);
143 return (__printf_out(io, pi, "(null)", 6));
145 if (pi->prec >= 0 && pi->prec < l)
147 return (__printf_out(io, pi, p, l));
150 /* 'c' ---------------------------------------------------------------*/
153 __printf_arginfo_chr(const struct printf_info *pi, size_t n, int *argt)
157 if (pi->is_long || pi->spec == 'C')
165 __printf_render_chr(struct __printf_io *io, const struct printf_info *pi,
166 const void *const *arg)
171 static const mbstate_t initial; /* XXX: this is bogus! */
174 char buf[MB_CUR_MAX];
176 if (pi->is_long || pi->spec == 'C') {
177 ii = *((wint_t *)arg[0]);
180 mbseqlen = wcrtomb(buf, (wchar_t)ii, &mbs);
181 if (mbseqlen == (size_t) -1)
183 return (__printf_out(io, pi, buf, mbseqlen));
185 i = *((int *)arg[0]);
187 i = __printf_out(io, pi, &c, 1);