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/* Printing operations with very long integers.
Copyright (C) 2012-2024 Free Software Foundation, Inc.
Contributed by Kenneth Zadeck <zadeck@naturalbridge.com>
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "pretty-print.h"
/*
* public printing routines.
*/
#define BLOCKS_NEEDED(PREC) \
(((PREC) + HOST_BITS_PER_WIDE_INT - 1) / HOST_BITS_PER_WIDE_INT)
void
print_dec (const wide_int_ref &wi, char *buf, signop sgn)
{
if (sgn == SIGNED)
print_decs (wi, buf);
else
print_decu (wi, buf);
}
void
print_dec (const wide_int_ref &wi, FILE *file, signop sgn)
{
if (sgn == SIGNED)
print_decs (wi, file);
else
print_decu (wi, file);
}
/* Try to print the signed self in decimal to BUF. */
void
print_decs (const wide_int_ref &wi, char *buf)
{
if (wi.get_precision () <= HOST_BITS_PER_WIDE_INT || wi.get_len () == 1)
{
if (wi::neg_p (wi))
sprintf (buf, "-" HOST_WIDE_INT_PRINT_UNSIGNED,
-(unsigned HOST_WIDE_INT) wi.to_shwi ());
else
sprintf (buf, HOST_WIDE_INT_PRINT_DEC, wi.to_shwi ());
}
else if (wi::neg_p (wi))
{
widest2_int w = widest2_int::from (wi, SIGNED);
*buf = '-';
print_decu (-w, buf + 1);
}
else
print_decu (wi, buf);
}
/* Try to print the signed self in decimal to FILE. */
void
print_decs (const wide_int_ref &wi, FILE *file)
{
char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf;
unsigned len;
if (print_decs_buf_size (wi, &len))
p = XALLOCAVEC (char, len);
print_decs (wi, p);
fputs (p, file);
}
/* Try to print the unsigned self in decimal to BUF. */
void
print_decu (const wide_int_ref &wi, char *buf)
{
if ((wi.get_precision () <= HOST_BITS_PER_WIDE_INT)
|| (wi.get_len () == 1 && !wi::neg_p (wi)))
sprintf (buf, HOST_WIDE_INT_PRINT_UNSIGNED, wi.to_uhwi ());
else
{
widest2_int w = widest2_int::from (wi, UNSIGNED), r;
widest2_int ten19 = HOST_WIDE_INT_UC (10000000000000000000);
char buf2[20], next1[19], next2[19];
size_t l, c = 0, i;
/* In order to avoid dividing this twice, print the 19 decimal
digit chunks in reverse order into buffer and then reorder
them in-place. */
while (wi::gtu_p (w, ten19))
{
w = wi::divmod_trunc (w, ten19, UNSIGNED, &r);
sprintf (buf + c * 19, "%019" PRIu64, r.to_uhwi ());
++c;
}
l = sprintf (buf2, HOST_WIDE_INT_PRINT_UNSIGNED, w.to_uhwi ());
buf[c * 19 + l] = '\0';
memcpy (next1, buf, 19);
memcpy (buf, buf2, l);
for (i = 0; i < c / 2; ++i)
{
memcpy (next2, buf + (c - i - 1) * 19, 19);
memcpy (buf + l + (c - i - 1) * 19, next1, 19);
memcpy (next1, buf + (i + 1) * 19, 19);
memcpy (buf + l + i * 19, next2, 19);
}
if (c & 1)
memcpy (buf + l + i * 19, next1, 19);
}
}
/* Try to print the signed self in decimal to FILE. */
void
print_decu (const wide_int_ref &wi, FILE *file)
{
char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf;
unsigned len;
if (print_decu_buf_size (wi, &len))
p = XALLOCAVEC (char, len);
print_decu (wi, p);
fputs (p, file);
}
void
print_hex (const wide_int_ref &val, char *buf)
{
if (val == 0)
buf += sprintf (buf, "0x0");
else
{
buf += sprintf (buf, "0x");
int start = ROUND_DOWN (val.get_precision (), HOST_BITS_PER_WIDE_INT);
int width = val.get_precision () - start;
bool first_p = true;
for (int i = start; i >= 0; i -= HOST_BITS_PER_WIDE_INT)
{
unsigned HOST_WIDE_INT uhwi = wi::extract_uhwi (val, i, width);
if (!first_p)
buf += sprintf (buf, HOST_WIDE_INT_PRINT_PADDED_HEX, uhwi);
else if (uhwi != 0)
{
buf += sprintf (buf, HOST_WIDE_INT_PRINT_HEX_PURE, uhwi);
first_p = false;
}
width = HOST_BITS_PER_WIDE_INT;
}
}
}
/* Print one big hex number to FILE. Note that some assemblers may not
accept this for large modes. */
void
print_hex (const wide_int_ref &wi, FILE *file)
{
char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf;
unsigned len;
if (print_hex_buf_size (wi, &len))
p = XALLOCAVEC (char, len);
print_hex (wi, p);
fputs (p, file);
}
/* Print larger precision wide_int. Not defined as inline in a header
together with pp_wide_int because XALLOCAVEC will make it uninlinable. */
void
pp_wide_int_large (pretty_printer *pp, const wide_int_ref &w, signop sgn)
{
unsigned int len;
print_dec_buf_size (w, sgn, &len);
char *buf = XALLOCAVEC (char, len);
print_dec (w, buf, sgn);
pp_string (pp, buf);
}
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