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# ====================================================================
#
#      stdio.cdl
#
#      C library stdio related configuration data
#
# ====================================================================
## ####ECOSGPLCOPYRIGHTBEGIN####                                            
## -------------------------------------------                              
## This file is part of eCos, the Embedded Configurable Operating System.   
## Copyright (C) 1998, 1999, 2000, 2001, 2002, 2009 Free Software Foundation, Inc.
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## for more details.                                                        
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##
## As a special exception, if other files instantiate templates or use      
## macros or inline functions from this file, or you compile this file      
## and link it with other works to produce a work based on this file,       
## this file does not by itself cause the resulting work to be covered by   
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## General Public License v2.                                               
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# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):      jlarmour
# Contributors:
# Date:           2000-04-14
#
#####DESCRIPTIONEND####
#
# ====================================================================

cdl_package CYGPKG_LIBC_STDIO {
    display       "ISO C library standard input/output functions"
    description   "
        This package provides standard input/output functions associated
        with the header file <stdio.h> as specified by the
        ISO C standard - ISO/IEC 9899:1990."
    doc           ref/libc.html
    include_dir   cyg/libc/stdio
    parent        CYGPKG_LIBC
    requires      CYGPKG_IO
    requires      CYGPKG_LIBC_I18N
    implements    CYGINT_ISO_STDIO_FILETYPES
    implements    CYGINT_ISO_STDIO_FILEACCESS
    implements    CYGINT_ISO_STDIO_FILEPOS
    implements    CYGINT_ISO_STDIO_FILEOPS
    implements    CYGINT_ISO_STDIO_FORMATTED_IO
    implements    CYGINT_ISO_STDIO_CHAR_IO
    implements    CYGINT_ISO_STDIO_DIRECT_IO
    implements    CYGINT_ISO_STDIO_ERROR
    implements    CYGINT_ISO_STDIO_STREAMS
    requires      { (CYGDAT_LIBC_STDIO_DEFAULT_CONSOLE == "\"/dev/ttydiag\"" ? \
                  CYGPKG_IO_SERIAL_HALDIAG : 1) }
    requires      { CYGBLD_ISO_STDIO_FILETYPES_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_FILEACCESS_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_FILEPOS_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_FILEOPS_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_FORMATTED_IO_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_CHAR_IO_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_DIRECT_IO_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_ERROR_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      { CYGBLD_ISO_STDIO_STREAMS_HEADER == \
                    "<cyg/libc/stdio/stdio.h>" }
    requires      CYGPKG_ISOINFRA
    requires      CYGINT_ISO_ERRNO_CODES
    requires      CYGINT_ISO_ERRNO
    requires      CYGINT_ISO_STRERROR
    requires      CYGINT_ISO_STRING_STRFUNCS
    requires      CYGINT_ISO_STRING_MEMFUNCS
    # The following is for scanf only. We could express this better,
    # particularly since scanf is also dependent on the optional ungetc.
    requires      CYGINT_ISO_STDLIB_STRCONV

    compile       common/fflush.cxx       common/feof.cxx        \
                  common/freopen.cxx      common/setvbuf.cxx     \
                  common/snprintf.cxx     common/sprintf.cxx     \
                  common/sscanf.cxx       common/stderr.cxx      \
                  common/stdin.cxx        common/stdiofiles.cxx  \
                  common/fseek.cxx        common/stdioinlines.cxx\
                  common/stdiosupp.cxx    common/stdout.cxx      \
                  common/stream.cxx       common/streambuf.cxx   \
                  common/ungetc.cxx       common/vsnprintf.cxx   \
                  common/vsscanf.cxx      common/fileops.cxx     \
                                                                 \
                  input/fgetc.cxx         input/fgets.cxx        \
                  input/fread.cxx         input/fscanf.cxx       \
                  input/gets.cxx          input/scanf.cxx        \
                  input/vfscanf.cxx                              \
                                                                 \
                  output/fnprintf.cxx     output/fprintf.cxx     \
                  output/fputc.cxx        output/fputs.cxx       \
                  output/fwrite.cxx       output/printf.cxx      \
                  output/vfnprintf.cxx

# ====================================================================

    cdl_option CYGIMP_LIBC_STDIO_INLINES {
        display       "Inline versions of <stdio.h> functions"
        default_value 1
        description   "
            This option chooses whether some of the
            particularly simple functions from
            <stdio.h> are available as inline
            functions. This may improve performance, and as
            the functions are small, may even improve code
            size."
    }
    
    cdl_option FOPEN_MAX {
        display       "Permitted number of open files"
        flavor        data
        legal_values  3 to 0x7fffffff
        default_value 8
        description   "
            This option controls the guaranteed minimum
            number of simultaneously open files. The ISO
            C standard requires it to be defined (para
            7.9.1), and if strictly compliant, it must be
            at least 8 (para 7.9.3). In practice it can be
            as low as 3 - for stdin, stdout and stderr."
    }
    
    cdl_option FILENAME_MAX {
        display       "Maximum length of filename"
        flavor        data
        legal_values  1 to 0x7fffffff
        default_value 16
        description   "
            This option defines the maximum allowed size of
            a filename in characters. The ISO C standard
            requires it to be defined (para 7.9.1)."
    }
    
    cdl_option L_tmpnam {
        display       "Maximum length of filenames for temporary files"
        flavor        data
        legal_values  4 to 0x7fffffff
        default_value 16
        description   "
            This option defines the maximum allowed size of
            filenames for temporary files as generated by
            tmpnam(). It is measured in characters, and the
            ISO C standard requires it to be defined (para 
            7.9.1)."
    }
    
    cdl_option TMP_MAX {
        display       "Unique file names generated by tmpnam()"
        flavor        data
        legal_values  1 to 0x7fffffff
        default_value 25
        description   "
            This option defines the minimum number of
            unique file names generated by tmpnam(). The
            ISO C standard requires it to be defined (para
            7.9.1) and for ISO compliance it should be at least
            25. Note that TMP_MAX names may not be generated
            if L_tmpnam is too small."
    }
    
    cdl_component CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO {
        display       "Buffered I/O"
        flavor        bool
        default_value 1 
        description   "
            This option controls whether input/output
            through the <stdio.h> functions is buffered.
            This may save some memory per file. It
            is equivalent to putting every file into
            non-buffered mode (_IONBF) through setvbuf(),
            except now it can never be altered back to
            buffered mode. Disabling buffering is strictly 
            non-compliant with the ISO C standard."
    
        cdl_option CYGNUM_LIBC_STDIO_BUFSIZE {
            display        "Default buffer size"
            flavor         data
            legal_values   1 to 0x7fffffff
            default_value  256
            description    "
                This option defines the default size of buffer
                used with calls to setbuf(), and is the default
                size for buffered streams that have not had
                either setbuf() or setvbuf() invoked on them.
                It is exactly equivalent to the standard
                constant BUFSIZ, except that it is 0 if
                CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO is disabled.
                The ISO C standard requires this to be defined
                (para 7.9.1), and says it must be at least 256
                (para 7.9.2)."
        }
        
        cdl_option CYGSEM_LIBC_STDIO_DYNAMIC_SETVBUF {
            display       "setbuf()/setvbuf() allows dynamic setting"
            default_value 1
            description   "
                This option controls whether I/O buffers are
                implemented dynamically within the stdio
                implementation. Otherwise they will be static,
                and cannot be changed by setbuf()/setvbuf(). If
                they are static (i.e. this option is disabled),
                any attempt to use an arbitrary buffer size, or
                to pass a user-supplied buffer to setbuf() or
                setvbuf() will fail - the buffer is implemented
                internally as a static array taking the size
                of the configuration option BUFSIZ. The only
                exception is if a user buffer is not supplied,
                and the buffer size requested is less than
                BUFSIZ. In this case, the buffer will
                be configured to only use that amount of
                buffering. However the unused memory left over
                will NOT be freed. If this option is enabled,
                then setvbuf() can be used to assign a user supplied
                buffer to the stream.
                Either setting can be considered to
                be compliant with the ISO C standard."
        }

        cdl_option CYGSEM_LIBC_STDIO_SETVBUF_MALLOC {
            display       "setbuf()/setvbuf() uses malloc()"
            requires      CYGINT_ISO_MALLOC
            requires      CYGSEM_LIBC_STDIO_DYNAMIC_SETVBUF
            default_value { 0 != CYGINT_ISO_MALLOC }
            description   "
                This option controls whether buffers set by setbuf() and
                setvbuf() may be allocated using malloc()."
        }

    }
    # Define BUFSIZ with same value as ..._BUFSIZE or 0
    cdl_option BUFSIZ {
        display       "Default buffer size (BUFSIZ)"
        flavor        data
        calculated    CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO \
                       ? "CYGNUM_LIBC_STDIO_BUFSIZE" : 0
    }
    
    cdl_option CYGFUN_LIBC_STDIO_ungetc {
        display       "Support for ungetc()"
        default_value   1
        description   "
            This option controls whether ungetc() is
            supported. If not, then some space can be
            saved, and speed is improved. Note that you
            MUST have this defined if you want to use the
            scanf() family of functions."
    }
    
    cdl_component CYGPKG_LIBC_STDIO_OPEN {
        display       "Dynamic opening/closing of files"
        requires      CYGINT_ISO_MALLOC
        default_value { 0 != CYGINT_ISO_MALLOC }
        compile       common/fopen.cxx common/fclose.cxx
        description   "
            fopen() and fclose() use dynamic memory
            allocation routines to allocate memory for
            new FILE structure pointers. If a malloc
            implementation is available, this option
            may be enabled to use
            fopen() and fclose(). If disabled, only the
            default console streams - stdin, stdout and
            stderr - will be available."

        cdl_option CYGFUN_LIBC_STDIO_OPEN_POSIX_FDFUNCS {
            display       "POSIX fdopen/fileno functions"
            active_if     CYGPKG_LIBC_STDIO_FILEIO
            implements    CYGINT_ISO_STDIO_POSIX_FDFUNCS
            calculated    1
            description   "This identifies to the rest of the system
                           whether the POSIX fdopen() and
                           fileno() functions are implemented."
        }
    }
    
    cdl_option CYGDAT_LIBC_STDIO_DEFAULT_CONSOLE {
        display       "Default console device"
        flavor        data
        default_value { CYGDAT_IO_SERIAL_TTY_CONSOLE ? CYGDAT_IO_SERIAL_TTY_CONSOLE : "\"/dev/null\"" }
        description   "
            This option allows you to choose the
            default console device. In the current
            implementation, all these devices begin
            with the prefix /dev/ and are followed by
            the name of a device. The name of the device
            depends on the device drivers you have
            configured in your system. For example,
            /dev/ttydiag could be the HAL diagnostic output
            pseudo-device, or /dev/tty0 could be your
            first serial driver, depending on your
            configuration."
    }
    
    cdl_component CYGPKG_LIBC_STDIO_FLOATING_POINT {
        display       "Floating point support"
        flavor        none
        description   "
            This component allows floating point support
            to be enabled in certain standard I/O
            functions."
    
        cdl_option CYGSEM_LIBC_STDIO_PRINTF_FLOATING_POINT {
            display       "printf() family"
            requires      CYGPKG_LIBM
            default_value { 0 != CYGPKG_LIBM }
            description   "
                This option enables the use of floating point
                number output in the printf() family (i.e.
                printf(), sprintf(), vprintf(), etc.) of
                functions. A substantial amount of code space
                can be saved if this option is disabled. If it
                is disabled then floating point specifiers
                (%e, %f, %g) are ignored, and nothing is
                output."
        }
    
        cdl_option CYGSEM_LIBC_STDIO_SCANF_FLOATING_POINT {
            display       "scanf() family"
            requires      CYGPKG_LIBM
            requires      CYGINT_ISO_STDLIB_STRCONV_FLOAT
            default_value { 0 != CYGPKG_LIBM &&
                            0 != CYGINT_ISO_STDLIB_STRCONV_FLOAT }
            description   "
                This option enables the use of floating point
                number conversion in the scanf() family (i.e.
                scanf(), sscanf(), vscanf(), etc.) of
                functions. A substantial amount of code space
                can be saved if this option is disabled. If it
                is disabled then floating point specifiers
                (%e, %f, %g) are ignored, and nothing is
                converted."
        }
    }

    cdl_option CYGFUN_LIBC_STDIO_LONGLONG {
        display       "Long long support"
        requires      CYGFUN_LIBC_STDLIB_CONV_LONGLONG
        default_value 1
        description   "
                This option allows various functions in the C Standard I/O
                library to support the 'long long' datatype. Doing so
                will come with a noticeable code size penalty however."
    }
    
    cdl_option CYGSEM_LIBC_STDIO_THREAD_SAFE_STREAMS {
        display       "Thread safe I/O streams"
        doc           ref/libc-thread-safety.html
        active_if     CYGPKG_KERNEL
        default_value 1
        description   "
            This option controls whether standard I/O streams
            are thread-safe. Having this option set allows
            the streams to be locked when accessed by
            multiple threads simultaneously."
    }
        
    cdl_option CYGIMP_LIBC_STDIO_C99_SNPRINTF {
        display       "C99 compliant snprintf() family"
        default_value 0
        description   "
                This option allows C99 compliant implementation of 
                snprintf() family (i.e. snprintf(), vsnprintf()) 
                of functions. C99 compliant snprintf() functions
                return the number of characters that would have been written 
                to a sufficiently sized buffer (excluding the '\\0'). 
                If this option is disabled, the functions simply return 
                the number of bytes that have been written to the buffer."
    }
    

# ====================================================================

    cdl_option CYGPKG_LIBC_STDIO_FILEIO {
        display "Enable use of FILEIO package for IO operations."
        active_if CYGPKG_IO_FILEIO
        requires CYGSEM_LIBC_STDIO_WANT_BUFFERED_IO
        requires CYGSEM_LIBC_STDIO_DYNAMIC_SETVBUF
        calculated 1
        description "
                This CDL exists to control how the standard I/O functions
                interface to the underlying I/O system. Either using the
                File I/O package, or the generic I/O package which is used
                by fewer devices."
    }
}

# ====================================================================

    cdl_component CYGPKG_LIBC_STDIO_OPTIONS {
        display "C library stdio functions build options"
        flavor  none
        no_define
        description   "
            Package specific build options including control over
            compiler flags used only in building this package,
            and details of which tests are built."


        cdl_option CYGPKG_LIBC_STDIO_CFLAGS_ADD {
            display "Additional compiler flags"
            flavor  data
            no_define
            default_value { "" }
            description   "
                This option modifies the set of compiler flags for
                building the C library. These flags are used in addition
                to the set of global flags."
        }

        cdl_option CYGPKG_LIBC_STDIO_CFLAGS_REMOVE {
            display "Suppressed compiler flags"
            flavor  data
            no_define
            default_value { "" }
            description   "
                This option modifies the set of compiler flags for
                building the C library. These flags are removed from
                the set of global flags if present."
        }

        cdl_option CYGPKG_LIBC_STDIO_TESTS {
            display "C library stdio function tests"
            flavor  data
            no_define
            calculated { 
                "tests/sprintf1 tests/sprintf2 tests/snprintf tests/sscanf tests/stdiooutput " 
                . ((CYGPKG_IO_FILEIO && CYGPKG_FS_RAM) ? "tests/fileio " : "")
            }
            description   "
                This option specifies the set of tests for the C library
                stdio functions."
        }
    }

# ====================================================================
# EOF stdio.cdl