1/* Printing operations with very long integers.
2   Copyright (C) 2012-2015 Free Software Foundation, Inc.
3   Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it
8under the terms of the GNU General Public License as published by the
9Free Software Foundation; either version 3, or (at your option) any
10later version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT
13ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along 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#include "tm.h"
25#include "hwint.h"
26#include "wide-int.h"
27#include "wide-int-print.h"
28
29/*
30 * public printing routines.
31 */
32
33#define BLOCKS_NEEDED(PREC) \
34  (((PREC) + HOST_BITS_PER_WIDE_INT - 1) / HOST_BITS_PER_WIDE_INT)
35
36void
37print_dec (const wide_int_ref &wi, char *buf, signop sgn)
38{
39  if (sgn == SIGNED)
40    print_decs (wi, buf);
41  else
42    print_decu (wi, buf);
43}
44
45void
46print_dec (const wide_int_ref &wi, FILE *file, signop sgn)
47{
48  if (sgn == SIGNED)
49    print_decs (wi, file);
50  else
51    print_decu (wi, file);
52}
53
54
55/* Try to print the signed self in decimal to BUF if the number fits
56   in a HWI.  Other print in hex.  */
57
58void
59print_decs (const wide_int_ref &wi, char *buf)
60{
61  if ((wi.get_precision () <= HOST_BITS_PER_WIDE_INT)
62      || (wi.get_len () == 1))
63    {
64      if (wi::neg_p (wi))
65      	sprintf (buf, "-" HOST_WIDE_INT_PRINT_UNSIGNED,
66		 -(unsigned HOST_WIDE_INT) wi.to_shwi ());
67      else
68	sprintf (buf, HOST_WIDE_INT_PRINT_DEC, wi.to_shwi ());
69    }
70  else
71    print_hex (wi, buf);
72}
73
74/* Try to print the signed self in decimal to FILE if the number fits
75   in a HWI.  Other print in hex.  */
76
77void
78print_decs (const wide_int_ref &wi, FILE *file)
79{
80  char buf[WIDE_INT_PRINT_BUFFER_SIZE];
81  print_decs (wi, buf);
82  fputs (buf, file);
83}
84
85/* Try to print the unsigned self in decimal to BUF if the number fits
86   in a HWI.  Other print in hex.  */
87
88void
89print_decu (const wide_int_ref &wi, char *buf)
90{
91  if ((wi.get_precision () <= HOST_BITS_PER_WIDE_INT)
92      || (wi.get_len () == 1 && !wi::neg_p (wi)))
93    sprintf (buf, HOST_WIDE_INT_PRINT_UNSIGNED, wi.to_uhwi ());
94  else
95    print_hex (wi, buf);
96}
97
98/* Try to print the signed self in decimal to FILE if the number fits
99   in a HWI.  Other print in hex.  */
100
101void
102print_decu (const wide_int_ref &wi, FILE *file)
103{
104  char buf[WIDE_INT_PRINT_BUFFER_SIZE];
105  print_decu (wi, buf);
106  fputs (buf, file);
107}
108
109void
110print_hex (const wide_int_ref &wi, char *buf)
111{
112  int i = wi.get_len ();
113
114  if (wi == 0)
115    buf += sprintf (buf, "0x0");
116  else
117    {
118      if (wi::neg_p (wi))
119	{
120	  int j;
121	  /* If the number is negative, we may need to pad value with
122	     0xFFF...  because the leading elements may be missing and
123	     we do not print a '-' with hex.  */
124	  buf += sprintf (buf, "0x");
125	  for (j = BLOCKS_NEEDED (wi.get_precision ()); j > i; j--)
126	    buf += sprintf (buf, HOST_WIDE_INT_PRINT_PADDED_HEX, (HOST_WIDE_INT) -1);
127
128	}
129      else
130	buf += sprintf (buf, "0x"HOST_WIDE_INT_PRINT_HEX_PURE, wi.elt (--i));
131
132      while (--i >= 0)
133	buf += sprintf (buf, HOST_WIDE_INT_PRINT_PADDED_HEX, wi.elt (i));
134    }
135}
136
137/* Print one big hex number to FILE.  Note that some assemblers may not
138   accept this for large modes.  */
139void
140print_hex (const wide_int_ref &wi, FILE *file)
141{
142  char buf[WIDE_INT_PRINT_BUFFER_SIZE];
143  print_hex (wi, buf);
144  fputs (buf, file);
145}
146
147