gcc/wide-int-print.cc

   1 /* Printing operations with very long integers.
   2    Copyright (C) 2012-2017 Free Software Foundation, Inc.
   3    Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it
   8 under the terms of the GNU General Public License as published by the
   9 Free Software Foundation; either version 3, or (at your option) any
  10 later version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT
  13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24
  25 /*
  26  * public printing routines.
  27  */
  28
  29 #define BLOCKS_NEEDED(PREC) \
  30   (((PREC) + HOST_BITS_PER_WIDE_INT - 1) / HOST_BITS_PER_WIDE_INT)
  31
  32 void
  33 print_dec (const wide_int_ref &wi, char *buf, signop sgn)
  34 {
  35   if (sgn == SIGNED)
  36     print_decs (wi, buf);
  37   else
  38     print_decu (wi, buf);
  39 }
  40
  41 void
  42 print_dec (const wide_int_ref &wi, FILE *file, signop sgn)
  43 {
  44   if (sgn == SIGNED)
  45     print_decs (wi, file);
  46   else
  47     print_decu (wi, file);
  48 }
  49
  50
  51 /* Try to print the signed self in decimal to BUF if the number fits
  52    in a HWI.  Other print in hex.  */
  53
  54 void
  55 print_decs (const wide_int_ref &wi, char *buf)
  56 {
  57   if ((wi.get_precision () <= HOST_BITS_PER_WIDE_INT)
  58       || (wi.get_len () == 1))
  59     {
  60       if (wi::neg_p (wi))
  61         sprintf (buf, "-" HOST_WIDE_INT_PRINT_UNSIGNED,
  62                  -(unsigned HOST_WIDE_INT) wi.to_shwi ());
  63       else
  64         sprintf (buf, HOST_WIDE_INT_PRINT_DEC, wi.to_shwi ());
  65     }
  66   else
  67     print_hex (wi, buf);
  68 }
  69
  70 /* Try to print the signed self in decimal to FILE if the number fits
  71    in a HWI.  Other print in hex.  */
  72
  73 void
  74 print_decs (const wide_int_ref &wi, FILE *file)
  75 {
  76   char buf[WIDE_INT_PRINT_BUFFER_SIZE];
  77   print_decs (wi, buf);
  78   fputs (buf, file);
  79 }
  80
  81 /* Try to print the unsigned self in decimal to BUF if the number fits
  82    in a HWI.  Other print in hex.  */
  83
  84 void
  85 print_decu (const wide_int_ref &wi, char *buf)
  86 {
  87   if ((wi.get_precision () <= HOST_BITS_PER_WIDE_INT)
  88       || (wi.get_len () == 1 && !wi::neg_p (wi)))
  89     sprintf (buf, HOST_WIDE_INT_PRINT_UNSIGNED, wi.to_uhwi ());
  90   else
  91     print_hex (wi, buf);
  92 }
  93
  94 /* Try to print the signed self in decimal to FILE if the number fits
  95    in a HWI.  Other print in hex.  */
  96
  97 void
  98 print_decu (const wide_int_ref &wi, FILE *file)
  99 {
 100   char buf[WIDE_INT_PRINT_BUFFER_SIZE];
 101   print_decu (wi, buf);
 102   fputs (buf, file);
 103 }
 104
 105 void
 106 print_hex (const wide_int_ref &val, char *buf)
 107 {
 108   if (val == 0)
 109     buf += sprintf (buf, "0x0");
 110   else
 111     {
 112       buf += sprintf (buf, "0x");
 113       int start = ROUND_DOWN (val.get_precision (), HOST_BITS_PER_WIDE_INT);
 114       int width = val.get_precision () - start;
 115       bool first_p = true;
 116       for (int i = start; i >= 0; i -= HOST_BITS_PER_WIDE_INT)
 117         {
 118           unsigned HOST_WIDE_INT uhwi = wi::extract_uhwi (val, i, width);
 119           if (!first_p)
 120             buf += sprintf (buf, HOST_WIDE_INT_PRINT_PADDED_HEX, uhwi);
 121           else if (uhwi != 0)
 122             {
 123               buf += sprintf (buf, HOST_WIDE_INT_PRINT_HEX_PURE, uhwi);
 124               first_p = false;
 125             }
 126           width = HOST_BITS_PER_WIDE_INT;
 127         }
 128     }
 129 }
 130
 131 /* Print one big hex number to FILE.  Note that some assemblers may not
 132    accept this for large modes.  */
 133 void
 134 print_hex (const wide_int_ref &wi, FILE *file)
 135 {
 136   char buf[WIDE_INT_PRINT_BUFFER_SIZE];
 137   print_hex (wi, buf);
 138   fputs (buf, file);
 139 }
 140