stdio-common/printf-prs.c

   1 /* Copyright (C) 1991,92,95,96,99,2000,2002,2003 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 #define DONT_NEED_READ_INT
  74 #include "printf-parse.h"
  75
  76
  77 size_t
  78 parse_printf_format (fmt, n, argtypes)
  79       const char *fmt;
  80       size_t n;
  81       int *argtypes;
  82 {
  83   size_t nargs;                 /* Number of arguments.  */
  84   size_t max_ref_arg;           /* Highest index used in a positional arg.  */
  85   struct printf_spec spec;
  86   mbstate_t mbstate;
  87
  88   nargs = 0;
  89   max_ref_arg = 0;
  90
  91   /* Search for format specifications.  */
  92   for (fmt = __find_specmb (fmt, &mbstate); *fmt != '\0'; fmt = spec.next_fmt)
  93     {
  94       /* Parse this spec.  */
  95       nargs += __parse_one_specmb (fmt, nargs, &spec, &max_ref_arg, &mbstate);
  96
  97       /* If the width is determined by an argument this is an int.  */
  98       if (spec.width_arg != -1 && (size_t) spec.width_arg < n)
  99         argtypes[spec.width_arg] = PA_INT;
 100
 101       /* If the precision is determined by an argument this is an int.  */
 102       if (spec.prec_arg != -1 && (size_t) spec.prec_arg < n)
 103         argtypes[spec.prec_arg] = PA_INT;
 104
 105       if ((size_t) spec.data_arg < n)
 106         switch (spec.ndata_args)
 107           {
 108           case 0:               /* No arguments.  */
 109             break;
 110           case 1:               /* One argument; we already have the type.  */
 111             argtypes[spec.data_arg] = spec.data_arg_type;
 112             break;
 113           default:
 114             /* We have more than one argument for this format spec.  We must
 115                call the arginfo function again to determine all the types.  */
 116             (void) (*__printf_arginfo_table[spec.info.spec])
 117               (&spec.info, n - spec.data_arg, &argtypes[spec.data_arg]);
 118             break;
 119           }
 120     }
 121
 122   return MAX (nargs, max_ref_arg);
 123 }