261 lines
6.4 KiB
C
261 lines
6.4 KiB
C
/* Copyright (C) 2002-2022 Free Software Foundation, Inc.
|
|
Contributed by Paul Brook
|
|
|
|
This file is part of the GNU Fortran runtime library (libgfortran).
|
|
|
|
Libgfortran 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.
|
|
|
|
Libgfortran 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.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include "libgfortran.h"
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <strings.h>
|
|
|
|
|
|
/* Given a fortran string, return its length exclusive of the trailing
|
|
spaces. */
|
|
|
|
gfc_charlen_type
|
|
fstrlen (const char *string, gfc_charlen_type len)
|
|
{
|
|
for (; len > 0; len--)
|
|
if (string[len-1] != ' ')
|
|
break;
|
|
|
|
return len;
|
|
}
|
|
|
|
|
|
/* Copy a Fortran string (not null-terminated, hence length arguments
|
|
for both source and destination strings. Returns the non-padded
|
|
length of the destination. */
|
|
|
|
gfc_charlen_type
|
|
fstrcpy (char *dest, gfc_charlen_type destlen,
|
|
const char *src, gfc_charlen_type srclen)
|
|
{
|
|
if (srclen >= destlen)
|
|
{
|
|
/* This will truncate if too long. */
|
|
memcpy (dest, src, destlen);
|
|
return destlen;
|
|
}
|
|
else
|
|
{
|
|
memcpy (dest, src, srclen);
|
|
/* Pad with spaces. */
|
|
memset (&dest[srclen], ' ', destlen - srclen);
|
|
return srclen;
|
|
}
|
|
}
|
|
|
|
|
|
/* Copy a null-terminated C string to a non-null-terminated Fortran
|
|
string. Returns the non-padded length of the destination string. */
|
|
|
|
gfc_charlen_type
|
|
cf_strcpy (char *dest, gfc_charlen_type dest_len, const char *src)
|
|
{
|
|
size_t src_len;
|
|
|
|
src_len = strlen (src);
|
|
|
|
if (src_len >= (size_t) dest_len)
|
|
{
|
|
/* This will truncate if too long. */
|
|
memcpy (dest, src, dest_len);
|
|
return dest_len;
|
|
}
|
|
else
|
|
{
|
|
memcpy (dest, src, src_len);
|
|
/* Pad with spaces. */
|
|
memset (&dest[src_len], ' ', dest_len - src_len);
|
|
return src_len;
|
|
}
|
|
}
|
|
|
|
|
|
#ifndef HAVE_STRNLEN
|
|
static size_t
|
|
strnlen (const char *s, size_t maxlen)
|
|
{
|
|
for (size_t ii = 0; ii < maxlen; ii++)
|
|
{
|
|
if (s[ii] == '\0')
|
|
return ii;
|
|
}
|
|
return maxlen;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef HAVE_STRNDUP
|
|
static char *
|
|
strndup (const char *s, size_t n)
|
|
{
|
|
size_t len = strnlen (s, n);
|
|
char *p = malloc (len + 1);
|
|
if (!p)
|
|
return NULL;
|
|
memcpy (p, s, len);
|
|
p[len] = '\0';
|
|
return p;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Duplicate a non-null-terminated Fortran string to a malloced
|
|
null-terminated C string. */
|
|
|
|
char *
|
|
fc_strdup (const char *src, gfc_charlen_type src_len)
|
|
{
|
|
gfc_charlen_type n = fstrlen (src, src_len);
|
|
char *p = strndup (src, n);
|
|
if (!p)
|
|
os_error ("Memory allocation failed in fc_strdup");
|
|
return p;
|
|
}
|
|
|
|
|
|
/* Duplicate a non-null-terminated Fortran string to a malloced
|
|
null-terminated C string, without getting rid of trailing
|
|
blanks. */
|
|
|
|
char *
|
|
fc_strdup_notrim (const char *src, gfc_charlen_type src_len)
|
|
{
|
|
char *p = strndup (src, src_len);
|
|
if (!p)
|
|
os_error ("Memory allocation failed in fc_strdup");
|
|
return p;
|
|
}
|
|
|
|
|
|
/* Given a fortran string and an array of st_option structures, search through
|
|
the array to find a match. If the option is not found, we generate an error
|
|
if no default is provided. */
|
|
|
|
int
|
|
find_option (st_parameter_common *cmp, const char *s1, gfc_charlen_type s1_len,
|
|
const st_option * opts, const char *error_message)
|
|
{
|
|
/* Strip trailing blanks from the Fortran string. */
|
|
size_t len = (size_t) fstrlen (s1, s1_len);
|
|
|
|
for (; opts->name; opts++)
|
|
if (len == strlen(opts->name) && strncasecmp (s1, opts->name, len) == 0)
|
|
return opts->value;
|
|
|
|
generate_error (cmp, LIBERROR_BAD_OPTION, error_message);
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* Fast helper function for a positive value that fits in uint64_t. */
|
|
|
|
static inline char *
|
|
itoa64 (uint64_t n, char *p)
|
|
{
|
|
while (n != 0)
|
|
{
|
|
*--p = '0' + (n % 10);
|
|
n /= 10;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
|
|
#if defined(HAVE_GFC_INTEGER_16)
|
|
# define TEN19 ((GFC_UINTEGER_LARGEST) 1000000 * (GFC_UINTEGER_LARGEST) 1000000 * (GFC_UINTEGER_LARGEST) 10000000)
|
|
|
|
/* Same as itoa64(), with zero padding of 19 digits. */
|
|
|
|
static inline char *
|
|
itoa64_pad19 (uint64_t n, char *p)
|
|
{
|
|
for (int k = 0; k < 19; k++)
|
|
{
|
|
*--p = '0' + (n % 10);
|
|
n /= 10;
|
|
}
|
|
return p;
|
|
}
|
|
#endif
|
|
|
|
|
|
/* Integer to decimal conversion.
|
|
|
|
This function is much more restricted than the widespread (but
|
|
non-standard) itoa() function. This version has the following
|
|
characteristics:
|
|
|
|
- it takes only non-negative arguments
|
|
- it is async-signal-safe (we use it runtime/backtrace.c)
|
|
- it works in base 10 (see xtoa, otoa, btoa functions
|
|
in io/write.c for other radices)
|
|
*/
|
|
|
|
const char *
|
|
gfc_itoa (GFC_UINTEGER_LARGEST n, char *buffer, size_t len)
|
|
{
|
|
char *p;
|
|
|
|
if (len < GFC_ITOA_BUF_SIZE)
|
|
sys_abort ();
|
|
|
|
if (n == 0)
|
|
return "0";
|
|
|
|
p = buffer + GFC_ITOA_BUF_SIZE - 1;
|
|
*p = '\0';
|
|
|
|
#if defined(HAVE_GFC_INTEGER_16)
|
|
/* On targets that have a 128-bit integer type, division in that type
|
|
is slow, because it occurs through a function call. We avoid that. */
|
|
|
|
if (n <= UINT64_MAX)
|
|
/* If the value fits in uint64_t, use the fast function. */
|
|
return itoa64 (n, p);
|
|
else
|
|
{
|
|
/* Otherwise, break down into smaller bits by division. Two calls to
|
|
the uint64_t function are not sufficient for all 128-bit unsigned
|
|
integers (we would need three calls), but they do suffice for all
|
|
values up to 2^127, which is the largest that Fortran can produce
|
|
(-HUGE(0_16)-1) with its signed integer types. */
|
|
_Static_assert (sizeof(GFC_UINTEGER_LARGEST) <= 2 * sizeof(uint64_t),
|
|
"integer too large");
|
|
|
|
GFC_UINTEGER_LARGEST r;
|
|
r = n % TEN19;
|
|
n = n / TEN19;
|
|
assert (r <= UINT64_MAX);
|
|
p = itoa64_pad19 (r, p);
|
|
|
|
assert(n <= UINT64_MAX);
|
|
return itoa64 (n, p);
|
|
}
|
|
#else
|
|
/* On targets where the largest integer is 64-bit, just use that. */
|
|
return itoa64 (n, p);
|
|
#endif
|
|
}
|