gcc/config/i386/msformat-c.c

   1 /* Check calls to formatted I/O functions (-Wformat).
   2    Copyright (C) 1992-2014 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "tm.h"
  24 #include "tree.h"
  25 #include "flags.h"
  26 #include "c-family/c-common.h"
  27 #include "intl.h"
  28 #include "diagnostic.h"
  29 #include "langhooks.h"
  30 #include "c-family/c-format.h"
  31 #include "alloc-pool.h"
  32
  33 /* Mingw specific format attributes ms_printf, ms_scanf, and ms_strftime.  */
  34
  35 static format_length_info ms_printf_length_specs[] =
  36 {
  37   { "h", FMT_LEN_h, STD_C89, NULL, FMT_LEN_none, STD_C89, 0 },
  38   { "l", FMT_LEN_l, STD_C89, NULL, FMT_LEN_none, STD_C89, 0 },
  39   { "I32", FMT_LEN_l, STD_EXT, NULL, FMT_LEN_none, STD_C89, 1 },
  40   { "I64", FMT_LEN_ll, STD_EXT, NULL, FMT_LEN_none, STD_C89, 1 },
  41   { "I", FMT_LEN_L, STD_EXT, NULL, FMT_LEN_none, STD_C89, 1 },
  42   { NULL, FMT_LEN_none, STD_C89, NULL, FMT_LEN_none, STD_C89, 0 }
  43 };
  44
  45 static const format_flag_spec ms_printf_flag_specs[] =
  46 {
  47   { ' ',  0, 0, N_("' ' flag"),        N_("the ' ' printf flag"),              STD_C89 },
  48   { '+',  0, 0, N_("'+' flag"),        N_("the '+' printf flag"),              STD_C89 },
  49   { '#',  0, 0, N_("'#' flag"),        N_("the '#' printf flag"),              STD_C89 },
  50   { '0',  0, 0, N_("'0' flag"),        N_("the '0' printf flag"),              STD_C89 },
  51   { '-',  0, 0, N_("'-' flag"),        N_("the '-' printf flag"),              STD_C89 },
  52   { '\'', 0, 0, N_("''' flag"),        N_("the ''' printf flag"),              STD_EXT },
  53   { 'w',  0, 0, N_("field width"),     N_("field width in printf format"),     STD_C89 },
  54   { 'p',  0, 0, N_("precision"),       N_("precision in printf format"),       STD_C89 },
  55   { 'L',  0, 0, N_("length modifier"), N_("length modifier in printf format"), STD_C89 },
  56   { 0, 0, 0, NULL, NULL, STD_C89 }
  57 };
  58
  59 static const format_flag_pair ms_printf_flag_pairs[] =
  60 {
  61   { ' ', '+', 1, 0   },
  62   { '0', '-', 1, 0   }, { '0', 'p', 1, 'i' },
  63   { 0, 0, 0, 0 }
  64 };
  65
  66 static const format_flag_spec ms_scanf_flag_specs[] =
  67 {
  68   { '*',  0, 0, N_("assignment suppression"), N_("the assignment suppression scanf feature"), STD_C89 },
  69   { 'a',  0, 0, N_("'a' flag"),               N_("the 'a' scanf flag"),                       STD_EXT },
  70   { 'w',  0, 0, N_("field width"),            N_("field width in scanf format"),              STD_C89 },
  71   { 'L',  0, 0, N_("length modifier"),        N_("length modifier in scanf format"),          STD_C89 },
  72   { '\'', 0, 0, N_("''' flag"),               N_("the ''' scanf flag"),                       STD_EXT },
  73   { 0, 0, 0, NULL, NULL, STD_C89 }
  74 };
  75
  76 static const format_flag_pair ms_scanf_flag_pairs[] =
  77 {
  78   { '*', 'L', 0, 0 },
  79   { 0, 0, 0, 0 }
  80 };
  81
  82 static const format_flag_spec ms_strftime_flag_specs[] =
  83 {
  84   { '#', 0,   0, N_("'#' flag"),     N_("the '#' strftime flag"),          STD_EXT },
  85   { 0, 0, 0, NULL, NULL, STD_C89 }
  86 };
  87
  88 static const format_flag_pair ms_strftime_flag_pairs[] =
  89 {
  90   { 0, 0, 0, 0 }
  91 };
  92
  93 static const format_char_info ms_print_char_table[] =
  94 {
  95   /* C89 conversion specifiers.  */
  96   { "di",  0, STD_C89, { T89_I,   BADLEN,  T89_S,   T89_L,   T9L_LL,  T99_SST,  BADLEN, BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN  }, "-wp0 +'",  "i",  NULL },
  97   { "oxX", 0, STD_C89, { T89_UI,  BADLEN,  T89_US,  T89_UL,  T9L_ULL, T99_ST, BADLEN, BADLEN, BADLEN, BADLEN,  BADLEN,  BADLEN }, "-wp0#",     "i",  NULL },
  98   { "u",   0, STD_C89, { T89_UI,  BADLEN,  T89_US,  T89_UL,  T9L_ULL, T99_ST, BADLEN, BADLEN, BADLEN, BADLEN,  BADLEN,  BADLEN }, "-wp0'",    "i",  NULL },
  99   { "fgG", 0, STD_C89, { T89_D,   BADLEN,  BADLEN,  T99_D,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN, BADLEN, BADLEN }, "-wp0 +#'", "",   NULL },
 100   { "eE",  0, STD_C89, { T89_D,   BADLEN,  BADLEN,  T99_D,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN, BADLEN, BADLEN }, "-wp0 +#",  "",   NULL },
 101   { "c",   0, STD_C89, { T89_I,   BADLEN,  T89_S,  T94_WI,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "-w",        "",   NULL },
 102   { "s",   1, STD_C89, { T89_C,   BADLEN,  T89_S,  T94_W,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "-wp",       "cR", NULL },
 103   { "p",   1, STD_C89, { T89_V,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "-w",        "c",  NULL },
 104   { "n",   1, STD_C89, { T89_I,   BADLEN,  T89_S,   T89_L,   T9L_LL,  BADLEN,  BADLEN, BADLEN,  T99_IM,  BADLEN,  BADLEN,  BADLEN }, "",          "W",  NULL },
 105   /* X/Open conversion specifiers.  */
 106   { "C",   0, STD_EXT, { TEX_WI,  BADLEN,  T89_S,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "-w",        "",   NULL },
 107   { "S",   1, STD_EXT, { TEX_W,   BADLEN,  T89_S,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "-wp",       "R",  NULL },
 108   { NULL,  0, STD_C89, NOLENGTHS, NULL, NULL, NULL }
 109 };
 110
 111 static const format_char_info ms_scan_char_table[] =
 112 {
 113   /* C89 conversion specifiers.  */
 114   { "di",    1, STD_C89, { T89_I,   BADLEN,  T89_S,   T89_L,   T9L_LL,  T99_SST,  BADLEN, BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*w'", "W",   NULL },
 115   { "u",     1, STD_C89, { T89_UI,  BADLEN,  T89_US,  T89_UL,  T9L_ULL, T99_ST, BADLEN,  BADLEN, BADLEN, BADLEN,  BADLEN,  BADLEN }, "*w'", "W",   NULL },
 116   { "oxX",   1, STD_C89, { T89_UI,  BADLEN,  T89_US,  T89_UL,  T9L_ULL, T99_ST, BADLEN,  BADLEN, BADLEN, BADLEN,  BADLEN,  BADLEN }, "*w",   "W",   NULL },
 117   { "efgEG", 1, STD_C89, { T89_F,   BADLEN,  BADLEN,  T89_D,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN, BADLEN, BADLEN }, "*w'",  "W",   NULL },
 118   { "c",     1, STD_C89, { T89_C,   BADLEN,  T89_S,  T94_W,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*w",   "cW",  NULL },
 119   { "s",     1, STD_C89, { T89_C,   BADLEN,  T89_S,  T94_W,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*aw",  "cW",  NULL },
 120   { "[",     1, STD_C89, { T89_C,   BADLEN,  BADLEN,  T94_W,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*aw",  "cW[", NULL },
 121   { "p",     2, STD_C89, { T89_V,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*w",   "W",   NULL },
 122   { "n",     1, STD_C89, { T89_I,   BADLEN,  T89_S,   T89_L,   T9L_LL,  BADLEN,  BADLEN, BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "",     "W",   NULL },
 123   /* X/Open conversion specifiers.  */
 124   { "C",     1, STD_EXT, { TEX_W,   BADLEN,  T89_S,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*w",   "W",   NULL },
 125   { "S",     1, STD_EXT, { TEX_W,   BADLEN,  T89_S,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN }, "*aw",  "W",   NULL },
 126   { NULL, 0, STD_C89, NOLENGTHS, NULL, NULL, NULL }
 127 };
 128
 129 static const format_char_info ms_time_char_table[] =
 130 {
 131   /* C89 conversion specifiers.  */
 132   { "ABZab",            0, STD_C89, NOLENGTHS, "#",     "",   NULL },
 133   { "cx",               0, STD_C89, NOLENGTHS, "#",      "3",  NULL },
 134   { "HIMSUWdmw",        0, STD_C89, NOLENGTHS, "#",  "",   NULL },
 135   { "j",                0, STD_C89, NOLENGTHS, "#",  "",  NULL },
 136   { "p",                0, STD_C89, NOLENGTHS, "#",      "",   NULL },
 137   { "X",                0, STD_C89, NOLENGTHS, "#",      "",   NULL },
 138   { "y",                0, STD_C89, NOLENGTHS, "#", "4",  NULL },
 139   { "Y",                0, STD_C89, NOLENGTHS, "#", "",  NULL },
 140   { "%",                0, STD_C89, NOLENGTHS, "",       "",   NULL },
 141   /* C99 conversion specifiers.  */
 142   { "z",                0, STD_C99, NOLENGTHS, "#",      "",  NULL },
 143   { NULL,               0, STD_C89, NOLENGTHS, NULL, NULL, NULL }
 144 };
 145
 146 EXPORTED_CONST format_kind_info mingw_format_attributes[3] =
 147 {
 148   { "ms_printf",   ms_printf_length_specs,  ms_print_char_table, " +#0-'", NULL,
 149     ms_printf_flag_specs, ms_printf_flag_pairs,
 150     FMT_FLAG_ARG_CONVERT|FMT_FLAG_DOLLAR_MULTIPLE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_EMPTY_PREC_OK,
 151     'w', 0, 'p', 0, 'L', 0,
 152     &integer_type_node, &integer_type_node
 153   },
 154   { "ms_scanf",    ms_printf_length_specs,   ms_scan_char_table,  "*'", NULL,
 155     ms_scanf_flag_specs, ms_scanf_flag_pairs,
 156     FMT_FLAG_ARG_CONVERT|FMT_FLAG_SCANF_A_KLUDGE|FMT_FLAG_USE_DOLLAR|FMT_FLAG_ZERO_WIDTH_BAD|FMT_FLAG_DOLLAR_GAP_POINTER_OK,
 157     'w', 0, 0, '*', 'L', 0,
 158     NULL, NULL
 159   },
 160   { "ms_strftime", NULL,                 ms_time_char_table,  "", "#",
 161     ms_strftime_flag_specs, ms_strftime_flag_pairs,
 162     FMT_FLAG_FANCY_PERCENT_OK, 0, 0, 0, 0, 0, 0,
 163     NULL, NULL
 164   }
 165 };
 166
 167 /* Default overrides for printf, scanf and strftime.  */
 168 EXPORTED_CONST target_ovr_attr mingw_format_attribute_overrides[4] =
 169 {
 170   { "ms_printf", "printf" },
 171   { "ms_scanf", "scanf" },
 172   { "ms_strftime", "strftime" }
 173 };
 174
 175 /* Setup for option Wpedantic-ms-format.  */
 176
 177 #ifdef TARGET_OVERRIDES_FORMAT_INIT
 178
 179 /* Make sure TARGET_OVERRIDES_FORMAT_INIT is prototyped.  */
 180 extern void TARGET_OVERRIDES_FORMAT_INIT (void);
 181
 182 /* Helper.  */
 183 #define C89_OR_EXT (warn_pedantic_ms_format ? STD_EXT : STD_C89)
 184
 185 void
 186 TARGET_OVERRIDES_FORMAT_INIT (void)
 187 {
 188   ms_printf_length_specs[2].std = C89_OR_EXT; /* I32 */
 189   ms_printf_length_specs[3].std = C89_OR_EXT; /* I64 */
 190   ms_printf_length_specs[4].std = C89_OR_EXT; /* I */
 191 }
 192
 193 #undef C89_OR_EXT
 194
 195 #endif