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[glibc/history.git] / stdio-common / printf-prs.c
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1 /* Copyright (C) 1991, 1992, 1995, 1996 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
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 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <stdio.h>
20 #include <printf.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <wchar.h>
24 #include <sys/param.h>
26 #ifndef COMPILE_WPRINTF
27 # define CHAR_T char
28 # define UCHAR_T unsigned char
29 # define INT_T int
30 # define L_(Str) Str
31 # define ISDIGIT(Ch) isdigit (Ch)
33 # ifdef USE_IN_LIBIO
34 # define PUT(F, S, N) _IO_sputn (F, S, N)
35 # define PAD(Padchar) \
36 if (width > 0) \
37 done += _IO_padn (s, Padchar, width)
38 # else
39 # define PUTC(C, F) putc (C, F)
40 ssize_t __printf_pad __P ((FILE *, char pad, size_t n));
41 # define PAD(Padchar) \
42 if (width > 0) \
43 { if (__printf_pad (s, Padchar, width) == -1) \
44 return -1; else done += width; }
45 # endif
46 #else
47 # define vfprintf vfwprintf
48 # define CHAR_T wchar_t
49 # define UCHAR_T uwchar_t
50 # define INT_T wint_t
51 # define L_(Str) L##Str
52 # define ISDIGIT(Ch) iswdigit (Ch)
54 # ifdef USE_IN_LIBIO
55 # define PUT(F, S, N) _IO_sputn (F, S, N)
56 # define PAD(Padchar) \
57 if (width > 0) \
58 done += _IO_wpadn (s, Padchar, width)
59 # else
60 # define PUTC(C, F) wputc (C, F)
61 ssize_t __wprintf_pad __P ((FILE *, wchar_t pad, size_t n));
62 # define PAD(Padchar) \
63 if (width > 0) \
64 { if (__wprintf_pad (s, Padchar, width) == -1) \
65 return -1; else done += width; }
66 # endif
67 #endif
69 #include "printf-parse.h"
72 size_t
73 parse_printf_format (fmt, n, argtypes)
74 const char *fmt;
75 size_t n;
76 int *argtypes;
78 size_t nargs; /* Number of arguments. */
79 size_t max_ref_arg; /* Highest index used in a positional arg. */
80 struct printf_spec spec;
81 mbstate_t mbstate;
83 nargs = 0;
84 max_ref_arg = 0;
86 /* Search for format specifications. */
87 for (fmt = find_spec (fmt, &mbstate); *fmt != '\0'; fmt = spec.next_fmt)
89 /* Parse this spec. */
90 nargs += parse_one_spec (fmt, nargs, &spec, &max_ref_arg, &mbstate);
92 /* If the width is determined by an argument this is an int. */
93 if (spec.width_arg != -1 && (size_t) spec.width_arg < n)
94 argtypes[spec.width_arg] = PA_INT;
96 /* If the precision is determined by an argument this is an int. */
97 if (spec.prec_arg != -1 && (size_t) spec.prec_arg < n)
98 argtypes[spec.prec_arg] = PA_INT;
100 if ((size_t) spec.data_arg < n)
101 switch (spec.ndata_args)
103 case 0: /* No arguments. */
104 break;
105 case 1: /* One argument; we already have the type. */
106 argtypes[spec.data_arg] = spec.data_arg_type;
107 break;
108 default:
109 /* We have more than one argument for this format spec. We must
110 call the arginfo function again to determine all the types. */
111 (void) (*__printf_arginfo_table[spec.info.spec])
112 (&spec.info, n - spec.data_arg, &argtypes[spec.data_arg]);
113 break;
117 return MAX (nargs, max_ref_arg);