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