stdio-common/printf-prs.c

   1 /* Copyright (C) 1991, 1992, 1995, 1996, 1999 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 # define ISASCII(Ch)    isascii (Ch)
  33 # define MBRLEN(Cp, L, St) mbrlen (Cp, L, St)
  34
  35 # ifdef USE_IN_LIBIO
  36 #  define PUT(F, S, N)  _IO_sputn (F, S, N)
  37 #  define PAD(Padchar)                                                        \
  38   if (width > 0)                                                              \
  39     done += _IO_padn (s, Padchar, width)
  40 # else
  41 #  define PUTC(C, F)    putc (C, F)
  42 ssize_t __printf_pad __P ((FILE *, char pad, size_t n));
  43 # define PAD(Padchar)                                                         \
  44   if (width > 0)                                                              \
  45     { if (__printf_pad (s, Padchar, width) == -1)                             \
  46         return -1; else done += width; }
  47 # endif
  48 #else
  49 # define vfprintf       vfwprintf
  50 # define CHAR_T         wchar_t
  51 # define UCHAR_T        uwchar_t
  52 # define INT_T          wint_t
  53 # define L_(Str)        L##Str
  54 # define ISDIGIT(Ch)    iswdigit (Ch)
  55
  56 # ifdef USE_IN_LIBIO
  57 # define PUT(F, S, N)   _IO_sputn (F, S, N)
  58 # define PAD(Padchar)                                                         \
  59   if (width > 0)                                                              \
  60     done += _IO_wpadn (s, Padchar, width)
  61 # else
  62 #  define PUTC(C, F)    wputc (C, F)
  63 ssize_t __wprintf_pad __P ((FILE *, wchar_t pad, size_t n));
  64 # define PAD(Padchar)                                                         \
  65   if (width > 0)                                                              \
  66     { if (__wprintf_pad (s, Padchar, width) == -1)                            \
  67         return -1; else done += width; }
  68 # endif
  69 #endif
  70
  71 #include "printf-parse.h"
  72
  73
  74 size_t
  75 parse_printf_format (fmt, n, argtypes)
  76       const char *fmt;
  77       size_t n;
  78       int *argtypes;
  79 {
  80   size_t nargs;                 /* Number of arguments.  */
  81   size_t max_ref_arg;           /* Highest index used in a positional arg.  */
  82   struct printf_spec spec;
  83   mbstate_t mbstate;
  84
  85   nargs = 0;
  86   max_ref_arg = 0;
  87
  88   /* Search for format specifications.  */
  89   for (fmt = find_spec (fmt, &mbstate); *fmt != '\0'; fmt = spec.next_fmt)
  90     {
  91       /* Parse this spec.  */
  92       nargs += parse_one_spec (fmt, nargs, &spec, &max_ref_arg, &mbstate);
  93
  94       /* If the width is determined by an argument this is an int.  */
  95       if (spec.width_arg != -1 && (size_t) spec.width_arg < n)
  96         argtypes[spec.width_arg] = PA_INT;
  97
  98       /* If the precision is determined by an argument this is an int.  */
  99       if (spec.prec_arg != -1 && (size_t) spec.prec_arg < n)
 100         argtypes[spec.prec_arg] = PA_INT;
 101
 102       if ((size_t) spec.data_arg < n)
 103         switch (spec.ndata_args)
 104           {
 105           case 0:               /* No arguments.  */
 106             break;
 107           case 1:               /* One argument; we already have the type.  */
 108             argtypes[spec.data_arg] = spec.data_arg_type;
 109             break;
 110           default:
 111             /* We have more than one argument for this format spec.  We must
 112                call the arginfo function again to determine all the types.  */
 113             (void) (*__printf_arginfo_table[spec.info.spec])
 114               (&spec.info, n - spec.data_arg, &argtypes[spec.data_arg]);
 115             break;
 116           }
 117     }
 118
 119   return MAX (nargs, max_ref_arg);
 120 }