/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org> * * GNU Library General Public License (LGPL) version 2 or later. * * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details. */ #include "_stdio.h" #include <stdarg.h> #include <wchar.h> libc_hidden_proto(vswprintf) /* NB: this file is not used if __USE_OLD_VFPRINTF__ */ #ifndef __STDIO_BUFFERS #warning Skipping vswprintf since no buffering! #else /* __STDIO_BUFFERS */ int vswprintf(wchar_t *__restrict buf, size_t size, const wchar_t * __restrict format, va_list arg) { FILE f; int rv; /* __STDIO_STREAM_RESET_GCS(&f); */ #ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__ f.__cookie = &(f.__filedes); f.__gcs.read = NULL; f.__gcs.write = NULL; f.__gcs.seek = NULL; f.__gcs.close = NULL; #endif f.__filedes = __STDIO_STREAM_FAKE_VSWPRINTF_FILEDES; f.__modeflags = (__FLAG_WIDE|__FLAG_WRITEONLY|__FLAG_WRITING); f.__ungot_width[0] = 0; #ifdef __STDIO_MBSTATE __INIT_MBSTATE(&(f.__state)); #endif /* __STDIO_MBSTATE */ f.__nextopen = NULL; if (size > ((SIZE_MAX - (size_t) buf)/sizeof(wchar_t))) { size = ((SIZE_MAX - (size_t) buf)/sizeof(wchar_t)); } f.__bufstart = (char *) buf; f.__bufend = (char *)(buf + size); __STDIO_STREAM_INIT_BUFREAD_BUFPOS(&f); __STDIO_STREAM_DISABLE_GETC(&f); __STDIO_STREAM_DISABLE_PUTC(&f); rv = _vfwprintf_internal(&f, format, arg); /* NOTE: Return behaviour differs from snprintf... */ if (f.__bufpos == f.__bufend) { rv = -1; if (size) { f.__bufpos = (char *)(((wchar_t *) f.__bufpos) - 1); } } if (size) { *((wchar_t *) f.__bufpos) = 0; } return rv; } libc_hidden_def(vswprintf) #endif /* __STDIO_BUFFERS */