| File: | build/gcc/wide-int-print.cc |
| Warning: | line 109, column 5 Value stored to 'buf' is never read |
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| 1 | /* Printing operations with very long integers. |
| 2 | Copyright (C) 2012-2023 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)(((PREC) + 64 - 1) / 64) \ |
| 30 | (((PREC) + HOST_BITS_PER_WIDE_INT64 - 1) / HOST_BITS_PER_WIDE_INT64) |
| 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_INT64) |
| 58 | || (wi.get_len () == 1)) |
| 59 | { |
| 60 | if (wi::neg_p (wi)) |
| 61 | sprintf (buf, "-" HOST_WIDE_INT_PRINT_UNSIGNED"%" "l" "u", |
| 62 | -(unsigned HOST_WIDE_INTlong) wi.to_shwi ()); |
| 63 | else |
| 64 | sprintf (buf, HOST_WIDE_INT_PRINT_DEC"%" "l" "d", 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(((((64*(8)) + 64) / 64) * 64) / 4 + 4)]; |
| 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_INT64) |
| 88 | || (wi.get_len () == 1 && !wi::neg_p (wi))) |
| 89 | sprintf (buf, HOST_WIDE_INT_PRINT_UNSIGNED"%" "l" "u", 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(((((64*(8)) + 64) / 64) * 64) / 4 + 4)]; |
| 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"); |
Value stored to 'buf' is never read | |
| 110 | else |
| 111 | { |
| 112 | buf += sprintf (buf, "0x"); |
| 113 | int start = ROUND_DOWN (val.get_precision (), HOST_BITS_PER_WIDE_INT)((val.get_precision ()) & ~((64) - 1)); |
| 114 | int width = val.get_precision () - start; |
| 115 | bool first_p = true; |
| 116 | for (int i = start; i >= 0; i -= HOST_BITS_PER_WIDE_INT64) |
| 117 | { |
| 118 | unsigned HOST_WIDE_INTlong uhwi = wi::extract_uhwi (val, i, width); |
| 119 | if (!first_p) |
| 120 | buf += sprintf (buf, HOST_WIDE_INT_PRINT_PADDED_HEX"%016" "l" "x", uhwi); |
| 121 | else if (uhwi != 0) |
| 122 | { |
| 123 | buf += sprintf (buf, HOST_WIDE_INT_PRINT_HEX_PURE"%" "l" "x", uhwi); |
| 124 | first_p = false; |
| 125 | } |
| 126 | width = HOST_BITS_PER_WIDE_INT64; |
| 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(((((64*(8)) + 64) / 64) * 64) / 4 + 4)]; |
| 137 | print_hex (wi, buf); |
| 138 | fputs (buf, file); |
| 139 | } |
| 140 |