stdio-common/printf-prs.c

   1 /* Copyright (C) 1991,92,95,96,99,2000,2002 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    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 #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 # ifdef USE_IN_LIBIO
  38 #  define PUT(F, S, N)  _IO_sputn (F, S, N)
  39 #  define PAD(Padchar)                                                        \
  40   if (width > 0)                                                              \
  41     done += INTUSE(_IO_padn) (s, Padchar, width)
  42 # else
  43 #  define PUTC(C, F)    putc (C, F)
  44 ssize_t __printf_pad __P ((FILE *, char pad, size_t n));
  45 # define PAD(Padchar)                                                         \
  46   if (width > 0)                                                              \
  47     { if (__printf_pad (s, Padchar, width) == -1)                             \
  48         return -1; else done += width; }
  49 # endif
  50 #else
  51 # define vfprintf       vfwprintf
  52 # define CHAR_T         wchar_t
  53 # define UCHAR_T        uwchar_t
  54 # define INT_T          wint_t
  55 # define L_(Str)        L##Str
  56 # define ISDIGIT(Ch)    iswdigit (Ch)
  57
  58 # ifdef USE_IN_LIBIO
  59 # define PUT(F, S, N)   _IO_sputn (F, S, N)
  60 # define PAD(Padchar)                                                         \
  61   if (width > 0)                                                              \
  62     done += _IO_wpadn (s, Padchar, width)
  63 # else
  64 #  define PUTC(C, F)    wputc (C, F)
  65 ssize_t __wprintf_pad __P ((FILE *, wchar_t pad, size_t n));
  66 # define PAD(Padchar)                                                         \
  67   if (width > 0)                                                              \
  68     { if (__wprintf_pad (s, Padchar, width) == -1)                            \
  69         return -1; else done += width; }
  70 # endif
  71 #endif
  72
  73 #include "printf-parse.h"
  74
  75
  76 size_t
  77 parse_printf_format (fmt, n, argtypes)
  78       const char *fmt;
  79       size_t n;
  80       int *argtypes;
  81 {
  82   size_t nargs;                 /* Number of arguments.  */
  83   size_t max_ref_arg;           /* Highest index used in a positional arg.  */
  84   struct printf_spec spec;
  85   mbstate_t mbstate;
  86
  87   nargs = 0;
  88   max_ref_arg = 0;
  89
  90   /* Search for format specifications.  */
  91   for (fmt = find_spec (fmt, &mbstate); *fmt != '\0'; fmt = spec.next_fmt)
  92     {
  93       /* Parse this spec.  */
  94       nargs += parse_one_spec (fmt, nargs, &spec, &max_ref_arg, &mbstate);
  95
  96       /* If the width is determined by an argument this is an int.  */
  97       if (spec.width_arg != -1 && (size_t) spec.width_arg < n)
  98         argtypes[spec.width_arg] = PA_INT;
  99
 100       /* If the precision is determined by an argument this is an int.  */
 101       if (spec.prec_arg != -1 && (size_t) spec.prec_arg < n)
 102         argtypes[spec.prec_arg] = PA_INT;
 103
 104       if ((size_t) spec.data_arg < n)
 105         switch (spec.ndata_args)
 106           {
 107           case 0:               /* No arguments.  */
 108             break;
 109           case 1:               /* One argument; we already have the type.  */
 110             argtypes[spec.data_arg] = spec.data_arg_type;
 111             break;
 112           default:
 113             /* We have more than one argument for this format spec.  We must
 114                call the arginfo function again to determine all the types.  */
 115             (void) (*__printf_arginfo_table[spec.info.spec])
 116               (&spec.info, n - spec.data_arg, &argtypes[spec.data_arg]);
 117             break;
 118           }
 119     }
 120
 121   return MAX (nargs, max_ref_arg);
 122 }