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/* vsprintf with automatic memory allocation. Copyright (C) 1999, 2002-2013 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, see <http://www.gnu.org/licenses/>. */ /* This file can be parametrized with the following macros: VASNPRINTF The name of the function being defined. FCHAR_T The element type of the format string. DCHAR_T The element type of the destination (result) string. FCHAR_T_ONLY_ASCII Set to 1 to enable verification that all characters in the format string are ASCII. MUST be set if FCHAR_T and DCHAR_T are not the same type. DIRECTIVE Structure denoting a format directive. Depends on FCHAR_T. DIRECTIVES Structure denoting the set of format directives of a format string. Depends on FCHAR_T. PRINTF_PARSE Function that parses a format string. Depends on FCHAR_T. DCHAR_CPY memcpy like function for DCHAR_T[] arrays. DCHAR_SET memset like function for DCHAR_T[] arrays. DCHAR_MBSNLEN mbsnlen like function for DCHAR_T[] arrays. SNPRINTF The system's snprintf (or similar) function. This may be either snprintf or swprintf. TCHAR_T The element type of the argument and result string of the said SNPRINTF function. This may be either char or wchar_t. The code exploits that sizeof (TCHAR_T) | sizeof (DCHAR_T) and alignof (TCHAR_T) <= alignof (DCHAR_T). DCHAR_IS_TCHAR Set to 1 if DCHAR_T and TCHAR_T are the same type. DCHAR_CONV_FROM_ENCODING A function to convert from char[] to DCHAR[]. DCHAR_IS_UINT8_T Set to 1 if DCHAR_T is uint8_t. DCHAR_IS_UINT16_T Set to 1 if DCHAR_T is uint16_t. DCHAR_IS_UINT32_T Set to 1 if DCHAR_T is uint32_t. */ /* Tell glibc's <stdio.h> to provide a prototype for snprintf(). This must come before <config.h> because <config.h> may include <features.h>, and once <features.h> has been included, it's too late. */ #ifndef _GNU_SOURCE # define _GNU_SOURCE 1 #endif #ifndef VASNPRINTF # include <config.h> #endif #ifndef IN_LIBINTL # include <alloca.h> #endif /* Specification. */ #ifndef VASNPRINTF # if WIDE_CHAR_VERSION # include "vasnwprintf.h" # else # include "vasnprintf.h" # endif #endif #include <locale.h> /* localeconv() */ #include <stdio.h> /* snprintf(), sprintf() */ #include <stdlib.h> /* abort(), malloc(), realloc(), free() */ #include <string.h> /* memcpy(), strlen() */ #include <errno.h> /* errno */ #include <limits.h> /* CHAR_BIT */ #include <float.h> /* DBL_MAX_EXP, LDBL_MAX_EXP */ #if HAVE_NL_LANGINFO # include <langinfo.h> #endif #ifndef VASNPRINTF # if WIDE_CHAR_VERSION # include "wprintf-parse.h" # else # include "printf-parse.h" # endif #endif /* Checked size_t computations. */ #include "xsize.h" #include "verify.h" #if (NEED_PRINTF_DOUBLE || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL # include <math.h> # include "float+.h" #endif #if (NEED_PRINTF_DOUBLE || NEED_PRINTF_INFINITE_DOUBLE) && !defined IN_LIBINTL # include <math.h> # include "isnand-nolibm.h" #endif #if (NEED_PRINTF_LONG_DOUBLE || NEED_PRINTF_INFINITE_LONG_DOUBLE) && !defined IN_LIBINTL # include <math.h> # include "isnanl-nolibm.h" # include "fpucw.h" #endif #if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_DOUBLE) && !defined IN_LIBINTL # include <math.h> # include "isnand-nolibm.h" # include "printf-frexp.h" #endif #if (NEED_PRINTF_DIRECTIVE_A || NEED_PRINTF_LONG_DOUBLE) && !defined IN_LIBINTL # include <math.h> # include "isnanl-nolibm.h" # include "printf-frexpl.h" # include "fpucw.h" #endif /* Default parameters. */ #ifndef VASNPRINTF # if WIDE_CHAR_VERSION # define VASNPRINTF vasnwprintf # define FCHAR_T wchar_t # define DCHAR_T wchar_t # define TCHAR_T wchar_t # define DCHAR_IS_TCHAR 1 # define DIRECTIVE wchar_t_directive # define DIRECTIVES wchar_t_directives # define PRINTF_PARSE wprintf_parse # define DCHAR_CPY wmemcpy # define DCHAR_SET wmemset # else # define VASNPRINTF vasnprintf # define FCHAR_T char # define DCHAR_T char # define TCHAR_T char # define DCHAR_IS_TCHAR 1 # define DIRECTIVE char_directive # define DIRECTIVES char_directives # define PRINTF_PARSE printf_parse # define DCHAR_CPY memcpy # define DCHAR_SET memset # endif #endif #if WIDE_CHAR_VERSION /* TCHAR_T is wchar_t. */ # define USE_SNPRINTF 1 # if HAVE_DECL__SNWPRINTF /* On Windows, the function swprintf() has a different signature than on Unix; we use the function _snwprintf() or - on mingw - snwprintf() instead. The mingw function snwprintf() has fewer bugs than the MSVCRT function _snwprintf(), so prefer that. */ # if defined __MINGW32__ # define SNPRINTF snwprintf # else # define SNPRINTF _snwprintf # endif # else /* Unix. */ # define SNPRINTF swprintf # endif #else /* TCHAR_T is char. */ /* Use snprintf if it exists under the name 'snprintf' or '_snprintf'. But don't use it on BeOS, since BeOS snprintf produces no output if the size argument is >= 0x3000000. Also don't use it on Linux libc5, since there snprintf with size = 1 writes any output without bounds, like sprintf. */ # if (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF) && !defined __BEOS__ && !(__GNU_LIBRARY__ == 1) # define USE_SNPRINTF 1 # else # define USE_SNPRINTF 0 # endif # if HAVE_DECL__SNPRINTF /* Windows. The mingw function snprintf() has fewer bugs than the MSVCRT function _snprintf(), so prefer that. */ # if defined __MINGW32__ # define SNPRINTF snprintf /* Here we need to call the native snprintf, not rpl_snprintf. */ # undef snprintf # else # define SNPRINTF _snprintf # endif # else /* Unix. */ # define SNPRINTF snprintf /* Here we need to call the native snprintf, not rpl_snprintf. */ # undef snprintf # endif #endif /* Here we need to call the native sprintf, not rpl_sprintf. */ #undef sprintf /* GCC >= 4.0 with -Wall emits unjustified "... may be used uninitialized" warnings in this file. Use -Dlint to suppress them. */ #ifdef lint # define IF_LINT(Code) Code #else # define IF_LINT(Code) /* empty */ #endif /* Avoid some warnings from "gcc -Wshadow". This file doesn't use the exp() and remainder() functions. */ #undef exp #define exp expo #undef remainder #define remainder rem #if (!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99) && !WIDE_CHAR_VERSION # if (HAVE_STRNLEN && !defined _AIX) # define local_strnlen strnlen # else # ifndef local_strnlen_defined # define local_strnlen_defined 1 static size_t local_strnlen (const char *string, size_t maxlen) { const char *end = memchr (string, '\0', maxlen); return end ? (size_t) (end - string) : maxlen; } # endif # endif #endif #if (((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99) && WIDE_CHAR_VERSION) || ((!USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || (NEED_PRINTF_DIRECTIVE_LS && !defined IN_LIBINTL)) && !WIDE_CHAR_VERSION && DCHAR_IS_TCHAR)) && HAVE_WCHAR_T # if HAVE_WCSLEN # define local_wcslen wcslen # else /* Solaris 2.5.1 has wcslen() in a separate library libw.so. To avoid a dependency towards this library, here is a local substitute. Define this substi