--- embedaddon/libiconv/srclib/stdio-write.c 2012/02/21 22:57:48 1.1.1.1 +++ embedaddon/libiconv/srclib/stdio-write.c 2012/05/29 09:29:43 1.1.1.2 @@ -1,5 +1,5 @@ /* POSIX compatible FILE stream write function. - Copyright (C) 2008 Free Software Foundation, Inc. + Copyright (C) 2008-2011 Free Software Foundation, Inc. Written by Bruno Haible , 2008. This program is free software: you can redistribute it and/or modify @@ -20,8 +20,9 @@ /* Specification. */ #include -/* Replace these functions only if module 'sigpipe' is requested. */ -#if GNULIB_SIGPIPE +/* Replace these functions only if module 'nonblocking' or module 'sigpipe' is + requested. */ +#if GNULIB_NONBLOCKING || GNULIB_SIGPIPE /* On native Windows platforms, SIGPIPE does not exist. When write() is called on a pipe with no readers, WriteFile() fails with error @@ -38,28 +39,75 @@ # define WIN32_LEAN_AND_MEAN /* avoid including junk */ # include +# if GNULIB_NONBLOCKING +# define CLEAR_ERRNO \ + errno = 0; +# define HANDLE_ENOSPC \ + if (errno == ENOSPC && ferror (stream)) \ + { \ + int fd = fileno (stream); \ + if (fd >= 0) \ + { \ + HANDLE h = (HANDLE) _get_osfhandle (fd); \ + if (GetFileType (h) == FILE_TYPE_PIPE) \ + { \ + /* h is a pipe or socket. */ \ + DWORD state; \ + if (GetNamedPipeHandleState (h, &state, NULL, NULL, \ + NULL, NULL, 0) \ + && (state & PIPE_NOWAIT) != 0) \ + /* h is a pipe in non-blocking mode. \ + Change errno from ENOSPC to EAGAIN. */ \ + errno = EAGAIN; \ + } \ + } \ + } \ + else +# else +# define CLEAR_ERRNO +# define HANDLE_ENOSPC +# endif + +# if GNULIB_SIGPIPE +# define CLEAR_LastError \ + SetLastError (0); +# define HANDLE_ERROR_NO_DATA \ + if (GetLastError () == ERROR_NO_DATA && ferror (stream)) \ + { \ + int fd = fileno (stream); \ + if (fd >= 0 \ + && GetFileType ((HANDLE) _get_osfhandle (fd)) \ + == FILE_TYPE_PIPE) \ + { \ + /* Try to raise signal SIGPIPE. */ \ + raise (SIGPIPE); \ + /* If it is currently blocked or ignored, change errno from \ + EINVAL to EPIPE. */ \ + errno = EPIPE; \ + } \ + } \ + else +# else +# define CLEAR_LastError +# define HANDLE_ERROR_NO_DATA +# endif + # define CALL_WITH_SIGPIPE_EMULATION(RETTYPE, EXPRESSION, FAILED) \ - if (ferror (stream)) \ - return (EXPRESSION); \ - else \ - { \ - RETTYPE ret; \ - SetLastError (0); \ - ret = (EXPRESSION); \ - if (FAILED && GetLastError () == ERROR_NO_DATA && ferror (stream)) \ - { \ - int fd = fileno (stream); \ - if (fd >= 0 \ - && GetFileType ((HANDLE) _get_osfhandle (fd)) == FILE_TYPE_PIPE)\ - { \ - /* Try to raise signal SIGPIPE. */ \ - raise (SIGPIPE); \ - /* If it is currently blocked or ignored, change errno from \ - EINVAL to EPIPE. */ \ - errno = EPIPE; \ - } \ - } \ - return ret; \ + if (ferror (stream)) \ + return (EXPRESSION); \ + else \ + { \ + RETTYPE ret; \ + CLEAR_ERRNO \ + CLEAR_LastError \ + ret = (EXPRESSION); \ + if (FAILED) \ + { \ + HANDLE_ENOSPC \ + HANDLE_ERROR_NO_DATA \ + ; \ + } \ + return ret; \ } # if !REPLACE_PRINTF_POSIX /* avoid collision with printf.c */ @@ -92,7 +140,7 @@ fprintf (FILE *stream, const char *format, ...) } # endif -# if !REPLACE_VFPRINTF_POSIX /* avoid collision with vprintf.c */ +# if !REPLACE_VPRINTF_POSIX /* avoid collision with vprintf.c */ int vprintf (const char *format, va_list args) { @@ -100,7 +148,7 @@ vprintf (const char *format, va_list args) } # endif -# if !REPLACE_VPRINTF_POSIX /* avoid collision with vfprintf.c */ +# if !REPLACE_VFPRINTF_POSIX /* avoid collision with vfprintf.c */ int vfprintf (FILE *stream, const char *format, va_list args) #undef vfprintf