stdio-common/printf-prs.c

   1 /* Copyright (C) 1991, 1992, 1995, 1996 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 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.
   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    Library General Public License for more details.
  13
  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.  */
  18
  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>
  25
  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)
  32
  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)
  53
  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
  68
  69 #include "printf-parse.h"
  70
  71
  72 size_t
  73 parse_printf_format (fmt, n, argtypes)
  74       const char *fmt;
  75       size_t n;
  76       int *argtypes;
  77 {
  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;
  82
  83   nargs = 0;
  84   max_ref_arg = 0;
  85
  86   /* Search for format specifications.  */
  87   for (fmt = find_spec (fmt, &mbstate); *fmt != '\0'; fmt = spec.next_fmt)
  88     {
  89       /* Parse this spec.  */
  90       nargs += parse_one_spec (fmt, nargs, &spec, &max_ref_arg, &mbstate);
  91
  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;
  95
  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;
  99
 100       if ((size_t) spec.data_arg < n)
 101         switch (spec.ndata_args)
 102           {
 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;
 114           }
 115     }
 116
 117   return MAX (nargs, max_ref_arg);
 118 }