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/* wrapc.c provide access to miscellaneous C library functions.
Copyright (C) 2005-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius@glam.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 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.
GNU Modula-2 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 "config.h"
#include "system.h"
#include "ansidecl.h"
#include "math.h"
#include "gm2-libs-host.h"
#ifdef __cplusplus
extern "C" {
#endif
/* strtime - returns the address of a string which describes the
local time. */
char *
wrapc_strtime (void)
{
#if defined(HAVE_CTIME)
time_t clock = time ((time_t *)0);
char *string = ctime (&clock);
string[24] = (char)0;
return string;
#else
return "";
#endif
}
int
wrapc_filesize (int f, unsigned int *low, unsigned int *high)
{
struct stat s;
int res = fstat (f, (struct stat *)&s);
if (res == 0)
{
*low = (unsigned int)s.st_size;
*high = (unsigned int)(s.st_size >> (sizeof (unsigned int) * 8));
}
return res;
}
/* filemtime - returns the mtime of a file, f. */
int
wrapc_filemtime (int f)
{
struct stat s;
if (fstat (f, (struct stat *)&s) == 0)
return s.st_mtime;
else
return -1;
}
/* fileinode - returns the inode associated with a file, f. */
#if defined(HAVE_SYS_STAT_H)
ino_t
wrapc_fileinode (int f, unsigned int *low, unsigned int *high)
{
struct stat s;
if (fstat (f, (struct stat *)&s) == 0)
{
*low = (unsigned int)s.st_ino;
*high = (unsigned int)(s.st_ino >> (sizeof (unsigned int) * 8));
return 0;
}
else
return -1;
}
#else
int
wrapc_fileinode (int f, unsigned int *low, unsigned int *high)
{
#error we need stat
*low = 0;
*high = 0;
return -1;
}
#endif
/* getrand - returns a random number between 0..n-1 */
int
wrapc_getrand (int n)
{
return rand () % n;
}
#if defined(HAVE_PWD_H)
#include <pwd.h>
char *
wrapc_getusername (void)
{
return getpwuid (getuid ())->pw_gecos;
}
/* getnameuidgid - fills in the, uid, and, gid, which represents
user, name. */
void
wrapc_getnameuidgid (char *name, int *uid, int *gid)
{
struct passwd *p = getpwnam (name);
if (p == NULL)
{
*uid = -1;
*gid = -1;
}
else
{
*uid = p->pw_uid;
*gid = p->pw_gid;
}
}
#else
char *
wrapc_getusername (void)
{
return "unknown";
}
void
wrapc_getnameuidgid (char *name, int *uid, int *gid)
{
*uid = -1;
*gid = -1;
}
#endif
int
wrapc_signbit (double r)
{
#if defined(HAVE_SIGNBIT)
/* signbit is a macro which tests its argument against sizeof(float),
sizeof(double) */
return signbit (r);
#else
return 0;
#endif
}
int
wrapc_signbitl (long double r)
{
#if defined(HAVE_SIGNBITL)
/* signbit is a macro which tests its argument against sizeof(float),
sizeof(double) */
return signbitl (r);
#else
return 0;
#endif
}
int
wrapc_signbitf (float r)
{
#if defined(HAVE_SIGNBITF)
/* signbit is a macro which tests its argument against sizeof(float),
sizeof(double) */
return signbitf (r);
#else
return 0;
#endif
}
/* isfinite - provide non builtin alternative to the gcc builtin
isfinite. Returns 1 if x is finite and 0 if it is not. */
int
wrapc_isfinite (double x)
{
return (fpclassify (x) != FP_NAN && fpclassify (x) != FP_INFINITE);
}
/* isfinitel - provide non builtin alternative to the gcc builtin
isfinite. Returns 1 if x is finite and 0 if it is not. */
int
wrapc_isfinitel (long double x)
{
return (fpclassify (x) != FP_NAN && fpclassify (x) != FP_INFINITE);
}
/* isfinitef - provide non builtin alternative to the gcc builtin
isfinite. Returns 1 if x is finite and 0 if it is not. */
int
wrapc_isfinitef (float x)
{
return (fpclassify (x) != FP_NAN && fpclassify (x) != FP_INFINITE);
}
/* init - init/finish functions for the module */
void
_M2_wrapc_init (int argc, char *argv[], char *envp[])
{
}
void
_M2_wrapc_finish ()
{
}
#ifdef __cplusplus
}
#endif
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