diff options
Diffstat (limited to 'wcsmbs/btowc.c')
| -rw-r--r-- | wcsmbs/btowc.c | 46 |
1 files changed, 40 insertions, 6 deletions
diff --git a/wcsmbs/btowc.c b/wcsmbs/btowc.c index 4c2f9df215..268b1f2378 100644 --- a/wcsmbs/btowc.c +++ b/wcsmbs/btowc.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu> @@ -17,18 +17,52 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <gconv.h> #include <stdio.h> +#include <string.h> #include <wchar.h> +#include <wcsmbsload.h> -/* We use UTF8 encoding for multibyte strings and therefore a valid - one byte multibyte string only can have a value from 0 to 0x7f. */ wint_t btowc (c) int c; { - if (WEOF != (wint_t) EOF || c < 0 || c > 0x7f) + char buf[sizeof (wchar_t)]; + struct gconv_step_data data; + char inbuf[1]; + size_t inbytes; + size_t converted; + int status; + + /* If the parameter does not fit into one byte or it is the EOF value + we can give the answer now. */ + if (c < -128 || c > 127 || c == EOF) + return WEOF; + + /* Tell where we want the result. */ + data.outbuf = (char *) buf; + data.outbufavail = 0; + data.outbufsize = sizeof (wchar_t); + data.is_last = 1; + data.statep = &data.__state; + + /* Make sure we start in the initial state. */ + memset (&data.__state, '\0', sizeof (mbstate_t)); + + /* Make sure we use the correct function. */ + update_conversion_ptrs (); + + /* Create the input string. */ + inbuf[0] = c; + inbytes = 1; + + status = (*__wcsmbs_gconv_fcts.towc->fct) (__wcsmbs_gconv_fcts.towc, + &data, inbuf, &inbytes, + &converted, 0); + /* The conversion failed. */ + if (status != GCONV_OK && status != GCONV_FULL_OUTPUT) return WEOF; - else - return (wint_t) c; + + return *(wchar_t *)buf; } |