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Diffstat (limited to 'stdio/printf.h')
| -rw-r--r-- | stdio/printf.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/stdio/printf.h b/stdio/printf.h new file mode 100644 index 0000000000..c369222281 --- /dev/null +++ b/stdio/printf.h @@ -0,0 +1,114 @@ +/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#ifndef _PRINTF_H + +#define _PRINTF_H 1 +#include <features.h> + +__BEGIN_DECLS + +#define __need_FILE +#include <stdio.h> +#define __need_size_t +#include <stddef.h> + +#include <stdarg.h> /* Need va_list. */ + + +struct printf_info +{ + int prec; /* Precision. */ + int width; /* Width. */ + unsigned char spec; /* Format letter. */ + unsigned int is_long_double:1;/* L flag. */ + unsigned int is_short:1; /* h flag. */ + unsigned int is_long:1; /* l flag. */ + unsigned int alt:1; /* # flag. */ + unsigned int space:1; /* Space flag. */ + unsigned int left:1; /* - flag. */ + unsigned int showsign:1; /* + flag. */ + unsigned int group:1; /* ' flag. */ + char pad; /* Padding character. */ +}; + + +/* Type of a printf specifier-handler function. + STREAM is the FILE on which to write output. + INFO gives information about the format specification. + Arguments can be read from ARGS. + The function should return the number of characters written, + or -1 for errors. */ + +typedef int printf_function __P ((FILE * __stream, + __const struct printf_info * __info, + va_list * __args)); +typedef int printf_arginfo_function __P ((__const struct printf_info * __info, + size_t __n, + int *__argtypes)); + +/* Register FUNC to be called to format SPEC specifiers. + ARGINFO, if not NULL, is a function used by `parse_printf_format' + to determine how many arguments a SPEC conversion requires, + and what their types are. */ +extern int register_printf_function __P ((int __spec, printf_function __func, + printf_arginfo_function __arginfo)); + +/* Parse FMT, and fill in N elements of ARGTYPES with the + types needed for the conversions FMT specifies. Returns + the number of arguments required by FMT. + + The ARGINFO function registered with a user-defined format is passed a + `struct printf_info' describing the format spec being parsed. A width + or precision of INT_MIN means a `*' was used to indicate that the + width/precision will come from an arg. The function should fill in the + array it is passed with the types of the arguments it wants, and return + the number of arguments it wants. */ + +extern size_t parse_printf_format __P ((__const char *__fmt, + size_t __n, + int *__argtypes)); + +/* Codes returned by `parse_printf_format' for basic types. + + These values cover all the standard format specifications. + Users can add new values after PA_LAST for their own types. */ + +enum +{ /* C type: */ + PA_INT, /* int */ + PA_CHAR, /* int, cast to char */ + PA_STRING, /* const char *, a '\0'-terminated string */ + PA_POINTER, /* void * */ + PA_FLOAT, /* float */ + PA_DOUBLE, /* double */ + PA_LAST +}; + +/* Flag bits that can be set in a type returned by `parse_printf_format'. */ +#define PA_FLAG_MASK 0xff00 +#define PA_FLAG_LONG_LONG (1 << 8) +#define PA_FLAG_LONG_DOUBLE PA_FLAG_LONG_LONG +#define PA_FLAG_LONG (1 << 9) +#define PA_FLAG_SHORT (1 << 10) +#define PA_FLAG_PTR (1 << 11) + + +__END_DECLS + +#endif /* printf.h */ |