| /* Copyright (C) 1991-1993,1995-2001,2006,2009 |
| 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 Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _PRINTF_H |
| |
| #define _PRINTF_H 1 |
| #include <features.h> |
| |
| __BEGIN_DECLS |
| |
| #define __need_FILE |
| #include <stdio.h> |
| #define __need_size_t |
| #define __need_wchar_t |
| #include <stddef.h> |
| #include <stdarg.h> |
| |
| |
| struct printf_info |
| { |
| int prec; /* Precision. */ |
| int width; /* Width. */ |
| wchar_t 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. */ |
| unsigned int extra:1; /* For special use. */ |
| unsigned int is_char:1; /* hh flag. */ |
| unsigned int wide:1; /* Nonzero for wide character streams. */ |
| unsigned int i18n:1; /* I flag. */ |
| unsigned int __pad:4; /* Unused so far. */ |
| unsigned short int user; /* Bits for user-installed modifiers. */ |
| wchar_t 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. |
| ARGS is a vector of pointers to the argument data; |
| the number of pointers will be the number returned |
| by the associated arginfo function for the same INFO. |
| |
| The function should return the number of characters written, |
| or -1 for errors. */ |
| |
| typedef int printf_function (FILE *__stream, |
| __const struct printf_info *__info, |
| __const void *__const *__args); |
| |
| /* Type of a printf specifier-arginfo function. |
| INFO gives information about the format specification. |
| N, ARGTYPES, *SIZE has to contain the size of the parameter for |
| user-defined types, and return value are as for parse_printf_format |
| except that -1 should be returned if the handler cannot handle |
| this case. This allows to partially overwrite the functionality |
| of existing format specifiers. */ |
| |
| typedef int printf_arginfo_size_function (__const struct printf_info *__info, |
| size_t __n, int *__argtypes, |
| int *__size); |
| |
| /* Old version of 'printf_arginfo_function' without a SIZE parameter. */ |
| |
| typedef int printf_arginfo_function (__const struct printf_info *__info, |
| size_t __n, int *__argtypes); |
| |
| /* Type of a function to get a value of a user-defined from the |
| variable argument list. */ |
| typedef void printf_va_arg_function (void *__mem, va_list *__ap); |
| |
| |
| /* Register FUNC to be called to format SPEC specifiers; ARGINFO must be |
| specified to determine how many arguments a SPEC conversion requires and |
| what their types are. */ |
| |
| extern int register_printf_specifier (int __spec, printf_function __func, |
| printf_arginfo_size_function __arginfo) |
| __THROW; |
| |
| |
| /* Obsolete interface similar to register_printf_specifier. It can only |
| handle basic data types because the ARGINFO callback does not return |
| information on the size of the user-defined type. */ |
| |
| extern int register_printf_function (int __spec, printf_function __func, |
| printf_arginfo_function __arginfo) |
| __THROW __attribute_deprecated__; |
| |
| |
| /* Register a new modifier character sequence. If the call succeeds |
| it returns a positive value representing the bit set in the USER |
| field in 'struct printf_info'. */ |
| |
| extern int register_printf_modifier (__const wchar_t *__str) __wur __THROW; |
| |
| |
| /* Register variable argument handler for user type. The return value |
| is to be used in ARGINFO functions to signal the use of the |
| type. */ |
| extern int register_printf_type (printf_va_arg_function __fct) __wur __THROW; |
| |
| |
| /* 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 (__const char *__restrict __fmt, size_t __n, |
| int *__restrict __argtypes) __THROW; |
| |
| |
| /* Codes returned by `parse_printf_format' for basic types. |
| |
| These values cover all the standard format specifications. |
| Users can reserve new values after PA_LAST for their own types |
| using 'register_printf_type'. */ |
| |
| enum |
| { /* C type: */ |
| PA_INT, /* int */ |
| PA_CHAR, /* int, cast to char */ |
| PA_WCHAR, /* wide char */ |
| PA_STRING, /* const char *, a '\0'-terminated string */ |
| PA_WSTRING, /* const wchar_t *, wide character 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) |
| |
| |
| |
| /* Function which can be registered as `printf'-handlers. */ |
| |
| /* Print floating point value using using abbreviations for the orders |
| of magnitude used for numbers ('k' for kilo, 'm' for mega etc). If |
| the format specifier is a uppercase character powers of 1000 are |
| used. Otherwise powers of 1024. */ |
| extern int printf_size (FILE *__restrict __fp, |
| __const struct printf_info *__info, |
| __const void *__const *__restrict __args) __THROW; |
| |
| /* This is the appropriate argument information function for `printf_size'. */ |
| extern int printf_size_info (__const struct printf_info *__restrict |
| __info, size_t __n, int *__restrict __argtypes) |
| __THROW; |
| |
| #ifdef __LDBL_COMPAT |
| # include <bits/printf-ldbl.h> |
| #endif |
| |
| __END_DECLS |
| |
| #endif /* printf.h */ |
