1/* Copyright (C) 1991-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <stdio.h>
19#include <printf.h>
20#include <stdlib.h>
21#include <string.h>
22#include <wchar.h>
23#include <sys/param.h>
24#include <printf.h>
25
26#include "../locale/localeinfo.h"
27
28#ifndef COMPILE_WPRINTF
29# define CHAR_T char
30# define UCHAR_T unsigned char
31# define INT_T int
32# define L_(Str) Str
33# define ISDIGIT(Ch) isdigit (Ch)
34# define ISASCII(Ch) isascii (Ch)
35# define MBRLEN(Cp, L, St) __mbrlen (Cp, L, St)
36
37# define PUT(F, S, N) _IO_sputn (F, S, N)
38# define PAD(Padchar) \
39 if (width > 0) \
40 done += _IO_padn (s, Padchar, width)
41#else
42# define vfprintf vfwprintf
43# define CHAR_T wchar_t
44# define UCHAR_T uwchar_t
45# define INT_T wint_t
46# define L_(Str) L##Str
47# define ISDIGIT(Ch) iswdigit (Ch)
48
49# define PUT(F, S, N) _IO_sputn (F, S, N)
50# define PAD(Padchar) \
51 if (width > 0) \
52 done += _IO_wpadn (s, Padchar, width)
53#endif
54
55#define DONT_NEED_READ_INT
56#include "printf-parse.h"
57
58
59size_t
60parse_printf_format (const char *fmt, size_t n, int *argtypes)
61{
62 size_t nargs; /* Number of arguments. */
63 size_t max_ref_arg; /* Highest index used in a positional arg. */
64 struct printf_spec spec;
65 const unsigned char *f = (const unsigned char *) fmt;
66 bool failed;
67
68 nargs = 0;
69 max_ref_arg = 0;
70
71 /* Search for format specifications. */
72 for (f = __find_specmb (f); *f != '\0'; f = spec.next_fmt)
73 {
74 /* Parse this spec. */
75 nargs += __parse_one_specmb (f, nargs, &spec, &max_ref_arg, &failed);
76
77 /* If the width is determined by an argument, it is an int. */
78 if (spec.width_arg != -1 && (size_t) spec.width_arg < n)
79 argtypes[spec.width_arg] = PA_INT;
80
81 /* If the precision is determined by an argument, it is an int. */
82 if (spec.prec_arg != -1 && (size_t) spec.prec_arg < n)
83 argtypes[spec.prec_arg] = PA_INT;
84
85 if ((size_t) spec.data_arg < n)
86 switch (spec.ndata_args)
87 {
88 case 0: /* No arguments. */
89 break;
90 case 1: /* One argument; we already have the type. */
91 argtypes[spec.data_arg] = spec.data_arg_type;
92 break;
93 default:
94 /* We have more than one argument for this format spec. We must
95 call the arginfo function again to determine all the types. */
96 (void) (*__printf_arginfo_table[spec.info.spec])
97 (&spec.info, n - spec.data_arg, &argtypes[spec.data_arg],
98 &spec.size);
99 break;
100 }
101 }
102
103 return MAX (nargs, max_ref_arg);
104}
105