(STRTOF): Fix handling of numbers with lots of leading zeroes.
[glibc.git] / stdlib / wcstombs.c
blob6ddbfb17252a5b6a5d0f54ecaf2ad15f15589a1f
1 /* Copyright (C) 1991, 1992, 1995 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
19 #include <ansidecl.h>
20 #include "../locale/localeinfo.h"
21 #include <ctype.h>
22 #include <stddef.h>
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
28 /* Convert the `wchar_t' string in PWCS to a multibyte character string
29 in S, writing no more than N characters. Return the number of bytes
30 written, or (size_t) -1 if an invalid `wchar_t' was found. */
31 size_t
32 DEFUN(wcstombs, (s, pwcs, n),
33 register char *s AND register CONST wchar_t *pwcs AND register size_t n)
35 #if 0
36 register CONST mb_char *mb;
37 register int shift = 0;
38 #endif
40 register size_t written = 0;
41 register wchar_t w;
43 while ((w = *pwcs++) != (wchar_t) '\0')
45 if (isascii (w))
47 /* A normal character. */
48 *s++ = (unsigned char) w;
49 --n;
50 ++written;
52 else
54 #if 1
55 written = (size_t) -1;
56 break;
57 #else
58 mb = &_ctype_info->mbchar->mb_chars[w + shift];
59 if (mb->string == NULL || mb->len == 0)
61 written = (size_t) -1;
62 break;
64 else if (mb->len > n)
65 break;
66 else
68 memcpy ((PTR) s, (CONST PTR) mb->string, mb->len);
69 s += mb->len;
70 n -= mb->len;
71 written += mb->len;
72 shift += mb->shift;
74 #endif
78 /* Terminate the string if it has space. */
79 if (n > 0)
80 *s = '\0';
82 /* Return the number of characters written (or maybe an error). */
83 return written;