125 lines
4.1 KiB
C
125 lines
4.1 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#ifndef _PRINTF_H
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#define _PRINTF_H 1
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#include <features.h>
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__BEGIN_DECLS
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#define __need_FILE
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#include <stdio.h>
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#define __need_size_t
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#include <stddef.h>
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struct printf_info
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{
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int prec; /* Precision. */
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int width; /* Width. */
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unsigned char spec; /* Format letter. */
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unsigned int is_long_double:1;/* L flag. */
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unsigned int is_short:1; /* h flag. */
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unsigned int is_long:1; /* l flag. */
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unsigned int alt:1; /* # flag. */
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unsigned int space:1; /* Space flag. */
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unsigned int left:1; /* - flag. */
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unsigned int showsign:1; /* + flag. */
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unsigned int group:1; /* ' flag. */
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char pad; /* Padding character. */
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};
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/* Type of a printf specifier-handler function.
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STREAM is the FILE on which to write output.
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INFO gives information about the format specification.
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ARGS is a vector of pointers to the argument data;
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the number of pointers will be the number returned
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by the associated arginfo function for the same INFO.
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The function should return the number of characters written,
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or -1 for errors. */
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typedef int printf_function __P ((FILE *__stream,
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__const struct printf_info *__info,
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__const void *__const *__args));
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/* Type of a printf specifier-arginfo function.
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INFO gives information about the format specification.
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N, ARGTYPES, and return value are as for printf_parse_format. */
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typedef int printf_arginfo_function __P ((__const struct printf_info * __info,
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size_t __n,
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int *__argtypes));
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/* Register FUNC to be called to format SPEC specifiers; ARGINFO must be
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specified to determine how many arguments a SPEC conversion requires and
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what their types are, even if your program never calls
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`parse_printf_format'. */
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extern int register_printf_function __P ((int __spec, printf_function __func,
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printf_arginfo_function __arginfo));
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/* Parse FMT, and fill in N elements of ARGTYPES with the
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types needed for the conversions FMT specifies. Returns
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the number of arguments required by FMT.
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The ARGINFO function registered with a user-defined format is passed a
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`struct printf_info' describing the format spec being parsed. A width
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or precision of INT_MIN means a `*' was used to indicate that the
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width/precision will come from an arg. The function should fill in the
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array it is passed with the types of the arguments it wants, and return
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the number of arguments it wants. */
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extern size_t parse_printf_format __P ((__const char *__fmt,
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size_t __n,
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int *__argtypes));
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/* Codes returned by `parse_printf_format' for basic types.
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These values cover all the standard format specifications.
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Users can add new values after PA_LAST for their own types. */
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enum
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{ /* C type: */
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PA_INT, /* int */
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PA_CHAR, /* int, cast to char */
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PA_STRING, /* const char *, a '\0'-terminated string */
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PA_POINTER, /* void * */
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PA_FLOAT, /* float */
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PA_DOUBLE, /* double */
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PA_LAST
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};
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/* Flag bits that can be set in a type returned by `parse_printf_format'. */
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#define PA_FLAG_MASK 0xff00
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#define PA_FLAG_LONG_LONG (1 << 8)
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#define PA_FLAG_LONG_DOUBLE PA_FLAG_LONG_LONG
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#define PA_FLAG_LONG (1 << 9)
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#define PA_FLAG_SHORT (1 << 10)
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#define PA_FLAG_PTR (1 << 11)
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__END_DECLS
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#endif /* printf.h */
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