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109 lines
3.3 KiB
109 lines
3.3 KiB
4 years ago
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/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef _PRINTF_H
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#define _PRINTF_H 1
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef STDC_HEADERS
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# include <stddef.h>
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#endif
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#ifndef PARAMS
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# if __STDC__
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# define PARAMS(args) args
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# else
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# define PARAMS(args) ()
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# endif
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#endif
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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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char spec; /* Format letter. */
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unsigned is_long_double:1; /* L flag. */
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unsigned is_short:1; /* h flag. */
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unsigned is_long:1; /* l flag. */
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unsigned alt:1; /* # flag. */
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unsigned space:1; /* Space flag. */
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unsigned left:1; /* - flag. */
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unsigned showsign:1; /* + flag. */
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unsigned 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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Arguments can be read from ARGS.
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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) PARAMS ((FILE * __stream,
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const struct printf_info * __info,
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const void **const __args));
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typedef int (*printf_arginfo_function) PARAMS ((const struct printf_info
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*__info,
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size_t __n,
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int *__argtypes));
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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 PARAMS ((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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#endif /* printf.h */
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