lib/wprintf-parse.h

   1 /* Parse wprintf format string.
   2    Copyright (C) 1999-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file 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
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* This file can be parametrized with the following macros:
  18      STATIC             Set to 'static' to declare the function static.  */
  19 #ifndef _WPRINTF_PARSE_H
  20 #define _WPRINTF_PARSE_H
  21
  22 #if HAVE_FEATURES_H
  23 # include <features.h> /* for __GLIBC__, __UCLIBC__ */
  24 #endif
  25
  26 #include "printf-args.h"
  27
  28
  29 /* Flags */
  30 #define FLAG_GROUP       1      /* ' flag */
  31 #define FLAG_LEFT        2      /* - flag */
  32 #define FLAG_SHOWSIGN    4      /* + flag */
  33 #define FLAG_SPACE       8      /* space flag */
  34 #define FLAG_ALT        16      /* # flag */
  35 #define FLAG_ZERO       32
  36 #if __GLIBC__ >= 2 && !defined __UCLIBC__
  37 # define FLAG_LOCALIZED 64      /* I flag, uses localized digits */
  38 #endif
  39
  40 /* arg_index value indicating that no argument is consumed.  */
  41 #define ARG_NONE        (~(size_t)0)
  42
  43 /* Number of directly allocated directives (no malloc() needed).  */
  44 #define N_DIRECT_ALLOC_DIRECTIVES 7
  45
  46 /* A parsed directive.  */
  47 typedef struct
  48 {
  49   const wchar_t* dir_start;
  50   const wchar_t* dir_end;
  51   int flags;
  52   const wchar_t* width_start;
  53   const wchar_t* width_end;
  54   size_t width_arg_index;
  55   const wchar_t* precision_start;
  56   const wchar_t* precision_end;
  57   size_t precision_arg_index;
  58   wchar_t conversion; /* d i b B o u x X f F e E g G a A c s p n U % but not C S */
  59   size_t arg_index;
  60 }
  61 wchar_t_directive;
  62
  63 /* A parsed format string.  */
  64 typedef struct
  65 {
  66   size_t count;
  67   wchar_t_directive *dir;
  68   size_t max_width_length;
  69   size_t max_precision_length;
  70   wchar_t_directive direct_alloc_dir[N_DIRECT_ALLOC_DIRECTIVES];
  71 }
  72 wchar_t_directives;
  73
  74
  75 /* Parses the format string.  Fills in the number N of directives, and fills
  76    in directives[0], ..., directives[N-1], and sets directives[N].dir_start
  77    to the end of the format string.  Also fills in the arg_type fields of the
  78    arguments and the needed count of arguments.  */
  79 #ifdef STATIC
  80 STATIC
  81 #else
  82 extern
  83 #endif
  84 int wprintf_parse (const wchar_t *format, wchar_t_directives *d, arguments *a);
  85
  86 #endif /* _WPRINTF_PARSE_H */