1 /* Internal header for parsing printf format strings.
2 Copyright (C) 1995-2019 Free Software Foundation, Inc.
3 This file is part of th GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
28 /* Information parsed from the format spec. */
29 struct printf_info info
;
31 /* Pointers into the format string for the end of this format
32 spec and the next (or to the end of the string if no more). */
33 const UCHAR_T
*end_of_fmt
, *next_fmt
;
35 /* Position of arguments for precision and width, or -1 if `info' has
36 the constant value. */
37 int prec_arg
, width_arg
;
39 int data_arg
; /* Position of data argument. */
40 int data_arg_type
; /* Type of first argument. */
41 /* Number of arguments consumed by this format specifier. */
43 /* Size of the parameter for PA_USER type. */
48 /* The various kinds off arguments that can be passed to printf. */
54 long long int pa_long_long_int
;
55 unsigned int pa_u_int
;
56 unsigned long int pa_u_long_int
;
57 unsigned long long int pa_u_long_long_int
;
59 long double pa_long_double
;
60 #if __HAVE_FLOAT128_UNLIKE_LDBL
61 _Float128 pa_float128
;
63 const char *pa_string
;
64 const wchar_t *pa_wstring
;
70 #ifndef DONT_NEED_READ_INT
71 /* Read a simple integer from a string and update the string pointer.
72 It is assumed that the first character is a digit. */
74 read_int (const UCHAR_T
* *pstr
)
76 int retval
= **pstr
- L_('0');
78 while (ISDIGIT (*++(*pstr
)))
81 if (INT_MAX
/ 10 < retval
)
85 int digit
= **pstr
- L_('0');
88 if (INT_MAX
- digit
< retval
)
100 /* These are defined in reg-printf.c. */
101 extern printf_arginfo_size_function
**__printf_arginfo_table attribute_hidden
;
102 extern printf_function
**__printf_function_table attribute_hidden
;
103 extern printf_va_arg_function
**__printf_va_arg_table attribute_hidden
;
106 /* Find the next spec in FORMAT, or the end of the string. Returns
107 a pointer into FORMAT, to a '%' or a '\0'. */
108 __extern_always_inline
const unsigned char *
109 __find_specmb (const unsigned char *format
)
111 return (const unsigned char *) __strchrnul ((const char *) format
, '%');
114 __extern_always_inline
const unsigned int *
115 __find_specwc (const unsigned int *format
)
117 return (const unsigned int *) __wcschrnul ((const wchar_t *) format
, L
'%');
121 /* FORMAT must point to a '%' at the beginning of a spec. Fills in *SPEC
122 with the parsed details. POSN is the number of arguments already
123 consumed. At most MAXTYPES - POSN types are filled in TYPES. Return
124 the number of args consumed by this spec; *MAX_REF_ARG is updated so it
125 remains the highest argument index used. */
126 extern size_t __parse_one_specmb (const unsigned char *format
, size_t posn
,
127 struct printf_spec
*spec
,
128 size_t *max_ref_arg
) attribute_hidden
;
130 extern size_t __parse_one_specwc (const unsigned int *format
, size_t posn
,
131 struct printf_spec
*spec
,
132 size_t *max_ref_arg
) attribute_hidden
;
136 /* This variable is defined in reg-modifier.c. */
137 struct printf_modifier_record
;
138 extern struct printf_modifier_record
**__printf_modifier_table
141 /* Handle registered modifiers. */
142 extern int __handle_registered_modifier_mb (const unsigned char **format
,
143 struct printf_info
*info
)
145 extern int __handle_registered_modifier_wc (const unsigned int **format
,
146 struct printf_info
*info
)