/
platform.c
1022 lines (947 loc) · 28.6 KB
/
platform.c
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/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 1998, 2001 The R Development Core Team
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "Defn.h"
#include "Fileio.h"
#include <time.h>
/* Platform
*
* Return various platform dependent strings. This is similar to
* "Machine", but for strings rather than numerical values. These
* two functions should probably be amalgamated.
*/
static char *R_OSType = OSTYPE;
static char *R_FileSep = FILESEP;
SEXP do_Platform(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP value, names;
char *tmp;
checkArity(op, args);
PROTECT(value = allocVector(VECSXP, 5));
PROTECT(names = allocVector(STRSXP, 5));
SET_STRING_ELT(names, 0, mkChar("OS.type"));
SET_STRING_ELT(names, 1, mkChar("file.sep"));
SET_STRING_ELT(names, 2, mkChar("dynlib.ext"));
SET_STRING_ELT(names, 3, mkChar("GUI"));
SET_STRING_ELT(names, 4, mkChar("endian"));
SET_VECTOR_ELT(value, 0, mkString(R_OSType));
SET_VECTOR_ELT(value, 1, mkString(R_FileSep));
tmp = (char *) malloc(strlen(SHLIB_EXT) + 1);
if(!tmp) {
error("Could not allocate memory");
}
sprintf(tmp, "%s", SHLIB_EXT);
SET_VECTOR_ELT(value, 2, mkString(tmp));
SET_VECTOR_ELT(value, 3, mkString(R_GUIType));
#ifdef WORDS_BIGENDIAN
SET_VECTOR_ELT(value, 4, mkString("big"));
#else
SET_VECTOR_ELT(value, 4, mkString("little"));
#endif
setAttrib(value, R_NamesSymbol, names);
UNPROTECT(2);
return value;
}
/* date
*
* Return the current date in a standard format. This uses standard
* POSIX calls which should be available on each platform. We should
* perhaps check this in the configure script.
*/
/* BDR 2000/7/20.
* time and ctime are in fact ANSI C calls, so we don't check them.
*/
char *R_Date()
{
time_t t;
static char s[26]; /* own space */
time(&t);
strcpy(s, ctime(&t));
s[24] = '\0'; /* overwriting the final \n */
return s;
}
SEXP do_date(SEXP call, SEXP op, SEXP args, SEXP rho)
{
checkArity(op, args);
return mkString(R_Date());
}
/* show.file
*
* Display a file so that a user can view it. The function calls
* "R_ShowFile" which is a platform dependent hook that arranges
* for the file to be displayed. A reasonable approach would be to
* open a read-only edit window with the file displayed in it.
*
* FIXME : this should in fact take a vector of filenames and titles
* and display them concatenated in a window. For a pure console
* version, write down a pipe to a pager.
*/
#ifdef OLD
SEXP do_fileshow(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, tl;
checkArity(op, args);
fn = CAR(args);
tl = CADR(args);
if (!isString(fn) || length(fn) < 1 || STRING_ELT(fn, 0) == R_NilValue)
errorcall(call, "invalid filename");
if (!isString(tl) || length(tl) < 1 || STRING_ELT(tl, 0) == R_NilValue)
errorcall(call, "invalid filename");
if (!R_ShowFile(R_ExpandFileName(CHAR(STRING_ELT(fn, 0))),
CHAR(STRING_ELT(tl, 0))))
error("unable to display file \"%s\"", CHAR(STRING_ELT(fn, 0)));
return R_NilValue;
}
#else
SEXP do_fileshow(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, tl, hd, pg;
char **f, **h, *t, *vm, *pager;
Rboolean dl;
int i, n;
checkArity(op, args);
vm = vmaxget();
fn = CAR(args); args = CDR(args);
hd = CAR(args); args = CDR(args);
tl = CAR(args); args = CDR(args);
dl = (Rboolean)asLogical(CAR(args)); args = CDR(args);
pg = CAR(args);
n = 0; /* -Wall */
if (!isString(fn) || (n = length(fn)) < 1)
errorcall(call, "invalid filename specification");
if (!isString(hd) || length(hd) != n)
errorcall(call, "invalid headers");
if (!isString(tl))
errorcall(call, "invalid title");
if (!isString(pg))
errorcall(call, "invalid pager specification");
f = (char**)R_alloc(n, sizeof(char*));
h = (char**)R_alloc(n, sizeof(char*));
for (i = 0; i < n; i++) {
if (!isNull(STRING_ELT(fn, i)))
f[i] = CHAR(STRING_ELT(fn, i));
else
f[i] = CHAR(R_BlankString);
if (!isNull(STRING_ELT(hd, i)))
h[i] = CHAR(STRING_ELT(hd, i));
else
h[i] = CHAR(R_BlankString);
}
if (length(tl) >= 1 || !isNull(STRING_ELT(tl, 0)))
t = CHAR(STRING_ELT(tl, 0));
else
t = CHAR(R_BlankString);
if (length(pg) >= 1 || !isNull(STRING_ELT(pg, 0)))
pager = CHAR(STRING_ELT(pg, 0));
else
pager = CHAR(R_BlankString);
R_ShowFiles(n, f, h, t, dl, pager);
vmaxset(vm);
return R_NilValue;
}
#endif
/* append.file
*
* Given two file names as arguments and arranges for
* the second file to be appended to the second.
*/
#define APPENDBUFSIZE 512
static int R_AppendFile(char *file1, char *file2)
{
FILE *fp1, *fp2;
char buf[APPENDBUFSIZE];
int nchar, status = 0;
if((fp1 = R_fopen(R_ExpandFileName(file1), "ab")) == NULL) {
return 0;
}
if((fp2 = R_fopen(R_ExpandFileName(file2), "rb")) == NULL) {
fclose(fp1);
return 0;
}
while((nchar = fread(buf, 1, APPENDBUFSIZE, fp2)) == APPENDBUFSIZE)
if(fwrite(buf, 1, APPENDBUFSIZE, fp1) != APPENDBUFSIZE) {
goto append_error;
}
if(fwrite(buf, 1, nchar, fp1) != nchar) {
goto append_error;
}
status = 1;
append_error:
if (status == 0)
warning("write error during file append!");
fclose(fp1);
fclose(fp2);
return status;
}
SEXP do_fileappend(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP f1, f2, ans;
int i, n, n1, n2;
checkArity(op, args);
f1 = CAR(args); n1 = length(f1);
f2 = CADR(args); n2 = length(f2);
if (!isString(f1))
errorcall(call, "invalid first filename");
if (!isString(f2))
errorcall(call, "invalid second filename");
if (n1 < 1)
errorcall(call, "nothing to append to");
if (n2 < 1)
return allocVector(LGLSXP, 0);
n = (n1 > n2) ? n1 : n2;
PROTECT(ans = allocVector(LGLSXP, n));
for(i = 0; i < n; i++) {
if (STRING_ELT(f1, i%n1) == R_NilValue || STRING_ELT(f2, i%n2) == R_NilValue)
LOGICAL(ans)[i] = 0;
else
LOGICAL(ans)[i] =
R_AppendFile(CHAR(STRING_ELT(f1, i%n1)),
CHAR(STRING_ELT(f2, i%n2)));
}
UNPROTECT(1);
return ans;
}
SEXP do_filecreate(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, ans;
FILE *fp;
int i, n;
checkArity(op, args);
fn = CAR(args);
if (!isString(fn))
errorcall(call, "invalid filename argument");
n = length(fn);
PROTECT(ans = allocVector(LGLSXP, n));
for (i = 0; i < n; i++) {
LOGICAL(ans)[i] = 0;
if (STRING_ELT(fn, i) != R_NilValue &&
(fp = R_fopen(R_ExpandFileName(CHAR(STRING_ELT(fn, i))), "w"))
!= NULL) {
LOGICAL(ans)[i] = 1;
fclose(fp);
}
}
UNPROTECT(1);
return ans;
}
SEXP do_fileremove(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP f, ans;
int i, n;
checkArity(op, args);
f = CAR(args);
if (!isString(f))
errorcall(call, "invalid first filename");
n = length(f);
PROTECT(ans = allocVector(LGLSXP, n));
for (i = 0; i < n; i++) {
if (STRING_ELT(f, i) != R_NilValue)
LOGICAL(ans)[i] =
(remove(R_ExpandFileName(CHAR(STRING_ELT(f, i)))) == 0);
}
UNPROTECT(1);
return ans;
}
#if defined(Win32) || defined(Macintosh)
#include <errno.h>
#endif
SEXP do_filerename(SEXP call, SEXP op, SEXP args, SEXP rho)
{
char from[PATH_MAX], to[PATH_MAX], *p;
checkArity(op, args);
if (TYPEOF(CAR(args)) != STRSXP)
error("source must be a string");
p = R_ExpandFileName(CHAR(STRING_ELT(CAR(args), 0)));
if (strlen(p) >= PATH_MAX - 1)
error("expanded source name too long");
strncpy(from, p, PATH_MAX - 1);
if (TYPEOF(CADR(args)) != STRSXP)
error("destination must be a string");
p = R_ExpandFileName(CHAR(STRING_ELT(CADR(args), 0)));
if (strlen(p) >= PATH_MAX - 1)
error("expanded destination name too long");
strncpy(to, p, PATH_MAX - 1);
#if defined(Win32) || defined(Macintosh)
/* rename() on Windows does not overwrite files */
if (!unlink(to))
if (errno == EACCES) return mkFalse();
#endif
return rename(from, to) == 0 ? mkTrue() : mkFalse();
}
#ifndef Macintosh
# include <sys/types.h>
#else
# include <types.h>
#endif /* mac */
#if HAVE_DIRENT_H
# include <dirent.h>
#elif HAVE_SYS_NDIR_H
# include <sys/ndir.h>
#elif HAVE_SYS_DIR_H
# include <sys/dir.h>
#elif HAVE_NDIR_H
# include <ndir.h>
#elif defined(Macintosh)
# include "dirent.h" /* We use a local equivalent to dirent.h */
#endif
#ifdef USE_SYSTEM_REGEX
# include <regex.h>
#else
# include "Rregex.h"
#endif
static SEXP filename(char *dir, char *file)
{
SEXP ans;
if (dir) {
ans = allocString(strlen(dir) + strlen(R_FileSep) + strlen(file));
sprintf(CHAR(ans), "%s%s%s", dir, R_FileSep, file);
}
else {
ans = allocString(strlen(file));
sprintf(CHAR(ans), "%s", file);
}
return ans;
}
SEXP do_listfiles(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP d, p, ans;
DIR *dir;
struct dirent *de;
int allfiles, fullnames, count, pattern;
int i, ndir;
char *dnp, dirname[PATH_MAX];
regex_t reg;
checkArity(op, args);
d = CAR(args); args = CDR(args);
if (!isString(d))
errorcall(call, "invalid directory argument");
p = CAR(args); args = CDR(args);
pattern = 0;
if (isString(p) && length(p) >= 1 && STRING_ELT(p, 0) != R_NilValue)
pattern = 1;
else if (!isNull(p) && !(isString(p) && length(p) < 1))
errorcall(call, "invalid pattern argument");
allfiles = asLogical(CAR(args)); args = CDR(args);
fullnames = asLogical(CAR(args));
ndir = length(d);
if (pattern && regcomp(®, CHAR(STRING_ELT(p, 0)), REG_EXTENDED))
errorcall(call, "invalid pattern regular expression");
count = 0;
for (i = 0; i < ndir ; i++) {
dnp = R_ExpandFileName(CHAR(STRING_ELT(d, i)));
if (strlen(dnp) >= PATH_MAX) /* should not happen! */
error("directory/folder path name too long");
strcpy(dirname, dnp);
if ((dir = opendir(dirname)) == NULL) {
/* errorcall(call, "invalid directory/folder name");*/
warning("list.files: %s is not a readable directory", dirname);
} else {
while ((de = readdir(dir))) {
if (allfiles || !R_HiddenFile(de->d_name)) {
if (pattern) {
if(regexec(®, de->d_name, 0, NULL, 0) == 0)
count++;
}
else
count++;
}
}
closedir(dir);
}
}
PROTECT(ans = allocVector(STRSXP, count));
count = 0;
for (i = 0; i < ndir ; i++) {
dnp = R_ExpandFileName(CHAR(STRING_ELT(d, i)));
/* if (strlen(dnp) >= PATH_MAX) We've already checked!
error("directory/folder path name too long"); */
strcpy(dirname, dnp);
if (fullnames)
dnp = dirname;
else
dnp = NULL;
if ((dir = opendir(dirname)) != NULL) {
while ((de = readdir(dir))) {
if (allfiles || !R_HiddenFile(de->d_name)) {
if (pattern) {
if (regexec(®, de->d_name, 0, NULL, 0) == 0)
SET_STRING_ELT(ans, count++, filename(dnp, de->d_name));
}
else
SET_STRING_ELT(ans, count++, filename(dnp, de->d_name));
}
}
closedir(dir);
}
}
if (pattern)
regfree(®);
ssort(STRING_PTR(ans), count);
UNPROTECT(1);
return ans;
}
SEXP do_Rhome(SEXP call, SEXP op, SEXP args, SEXP rho)
{
char *path;
checkArity(op, args);
if (!(path = R_HomeDir()))
error("unable to determine R home location");
return mkString(path);
}
SEXP do_fileexists(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP file, ans;
int i, nfile;
checkArity(op, args);
if (!isString(file = CAR(args)))
errorcall(call, "invalid file argument");
nfile = length(file);
ans = allocVector(LGLSXP, nfile);
for(i = 0; i < nfile; i++) {
LOGICAL(ans)[i] = 0;
if (STRING_ELT(file, i) != R_NilValue)
LOGICAL(ans)[i] = R_FileExists(CHAR(STRING_ELT(file, i)));
}
return ans;
}
static int filbuf(char *buf, FILE *fp)
{
int c;
while((c = fgetc(fp)) != EOF) {
if (c == '\n' || c == '\r') {
*buf = '\0';
return 1;
}
*buf++ = c;
}
return 0;
}
SEXP do_indexsearch(SEXP call, SEXP op, SEXP args, SEXP rho)
{
/* index.search(topic, path, file, .Platform$file.sep, type) */
SEXP topic, path, indexname, sep, type;
char linebuf[256], topicbuf[256], *p, ctype[256];
int i, npath, ltopicbuf;
FILE *fp;
checkArity(op, args);
topic = CAR(args); args = CDR(args);
if(!isString(topic) || length(topic) < 1 || isNull(topic))
error("invalid \"topic\" argument");
path = CAR(args); args = CDR(args);
if(!isString(path) || length(path) < 1 || isNull(path))
error("invalid \"path\" argument");
indexname = CAR(args); args = CDR(args);
if(!isString(indexname) || length(indexname) < 1 || isNull(indexname))
error("invalid \"indexname\" argument");
sep = CAR(args); args = CDR(args);
if(!isString(sep) || length(sep) < 1 || isNull(sep))
error("invalid \"sep\" argument");
type = CAR(args);
if(!isString(type) || length(type) < 1 || isNull(type))
error("invalid \"type\" argument");
strcpy(ctype, CHAR(STRING_ELT(type, 0)));
sprintf(topicbuf, "%s\t", CHAR(STRING_ELT(topic, 0)));
ltopicbuf = strlen(topicbuf);
npath = length(path);
for (i = 0; i < npath; i++) {
sprintf(linebuf, "%s%s%s%s%s",
CHAR(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"help", CHAR(STRING_ELT(sep, 0)),
CHAR(STRING_ELT(indexname, 0)));
if ((fp = R_fopen(R_ExpandFileName(linebuf), "rt")) != NULL){
while (filbuf(linebuf, fp)) {
if(strncmp(linebuf, topicbuf, ltopicbuf) == 0) {
p = &linebuf[ltopicbuf - 1];
while(isspace((int)*p)) p++;
fclose(fp);
if (!strcmp(ctype, "html"))
sprintf(topicbuf, "%s%s%s%s%s%s",
CHAR(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"html", CHAR(STRING_ELT(sep, 0)),
p, ".html");
else if (!strcmp(ctype, "R-ex"))
sprintf(topicbuf, "%s%s%s%s%s%s",
CHAR(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"R-ex", CHAR(STRING_ELT(sep, 0)),
p, ".R");
else if (!strcmp(ctype, "latex"))
sprintf(topicbuf, "%s%s%s%s%s%s",
CHAR(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"latex", CHAR(STRING_ELT(sep, 0)),
p, ".tex");
else /* type = "help" */
sprintf(topicbuf, "%s%s%s%s%s",
CHAR(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
ctype, CHAR(STRING_ELT(sep, 0)), p);
return mkString(topicbuf);
}
}
fclose(fp);
}
}
return mkString("");
}
#define CHOOSEBUFSIZE 1024
SEXP do_filechoose(SEXP call, SEXP op, SEXP args, SEXP rho)
{
int new, len;
char buf[CHOOSEBUFSIZE];
checkArity(op, args);
new = asLogical(CAR(args));
if ((len = R_ChooseFile(new, buf, CHOOSEBUFSIZE)) == 0)
error("file choice cancelled");
if (len >= CHOOSEBUFSIZE - 1)
errorcall(call, "file name too long");
return mkString(R_ExpandFileName(buf));
}
#ifdef HAVE_STAT
# ifndef Macintosh
# include <sys/types.h>
# include <sys/stat.h>
# else
# include <types.h>
# ifndef __MRC__
# include <stat.h>
# else
# include <mpw_stat.h>
# endif
# endif /* mac */
# if defined(Unix) && defined(HAVE_PWD_H) && defined(HAVE_GRP_H) \
&& defined(HAVE_GETPWUID) && defined(HAVE_GETGRGID)
# include <pwd.h>
# include <grp.h>
# define UNIX_EXTRAS 1
# endif
SEXP do_fileinfo(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, ans, ansnames, fsize, mtime, ctime, atime, isdir,
mode, xxclass;
#ifdef UNIX_EXTRAS
SEXP uid, gid, uname, grname;
struct passwd *stpwd;
struct group *stgrp;
#endif
int i, n;
struct stat sb;
checkArity(op, args);
fn = CAR(args);
if (!isString(fn))
errorcall(call, "invalid filename argument");
n = length(fn);
#ifdef UNIX_EXTRAS
PROTECT(ans = allocVector(VECSXP, 10));
PROTECT(ansnames = allocVector(STRSXP, 10));
#else
PROTECT(ans = allocVector(VECSXP, 6));
PROTECT(ansnames = allocVector(STRSXP, 6));
#endif
fsize = SET_VECTOR_ELT(ans, 0, allocVector(INTSXP, n));
SET_STRING_ELT(ansnames, 0, mkChar("size"));
isdir = SET_VECTOR_ELT(ans, 1, allocVector(LGLSXP, n));
SET_STRING_ELT(ansnames, 1, mkChar("isdir"));
mode = SET_VECTOR_ELT(ans, 2, allocVector(INTSXP, n));
SET_STRING_ELT(ansnames, 2, mkChar("mode"));
mtime = SET_VECTOR_ELT(ans, 3, allocVector(REALSXP, n));
SET_STRING_ELT(ansnames, 3, mkChar("mtime"));
ctime = SET_VECTOR_ELT(ans, 4, allocVector(REALSXP, n));
SET_STRING_ELT(ansnames, 4, mkChar("ctime"));
atime = SET_VECTOR_ELT(ans, 5, allocVector(REALSXP, n));
SET_STRING_ELT(ansnames, 5, mkChar("atime"));
#ifdef UNIX_EXTRAS
uid = SET_VECTOR_ELT(ans, 6, allocVector(INTSXP, n));
SET_STRING_ELT(ansnames, 6, mkChar("uid"));
gid = SET_VECTOR_ELT(ans, 7, allocVector(INTSXP, n));
SET_STRING_ELT(ansnames, 7, mkChar("gid"));
uname = SET_VECTOR_ELT(ans, 8, allocVector(STRSXP, n));
SET_STRING_ELT(ansnames, 8, mkChar("uname"));
grname = SET_VECTOR_ELT(ans, 9, allocVector(STRSXP, n));
SET_STRING_ELT(ansnames, 9, mkChar("grname"));
#endif
for (i = 0; i < n; i++) {
if (STRING_ELT(fn, i) != R_NilValue &&
stat(R_ExpandFileName(CHAR(STRING_ELT(fn, i))), &sb) == 0) {
INTEGER(fsize)[i] = (int) sb.st_size;
LOGICAL(isdir)[i] = (int) sb.st_mode & S_IFDIR;
INTEGER(mode)[i] = (int) sb.st_mode & 0007777;
REAL(mtime)[i] = (double) sb.st_mtime;
REAL(ctime)[i] = (double) sb.st_ctime;
REAL(atime)[i] = (double) sb.st_atime;
#ifdef UNIX_EXTRAS
INTEGER(uid)[i] = (int) sb.st_uid;
INTEGER(gid)[i] = (int) sb.st_gid;
stpwd = getpwuid(sb.st_uid);
if(stpwd) SET_STRING_ELT(uname, i, mkChar(stpwd->pw_name));
else SET_STRING_ELT(uname, i, NA_STRING);
stgrp = getgrgid(sb.st_gid);
if(stgrp) SET_STRING_ELT(grname, i, mkChar(stgrp->gr_name));
else SET_STRING_ELT(grname, i, NA_STRING);
#endif
} else {
INTEGER(fsize)[i] = NA_INTEGER;
LOGICAL(isdir)[i] = NA_INTEGER;
INTEGER(mode)[i] = NA_INTEGER;
REAL(mtime)[i] = NA_REAL;
REAL(ctime)[i] = NA_REAL;
REAL(atime)[i] = NA_REAL;
#ifdef UNIX_EXTRAS
INTEGER(uid)[i] = NA_INTEGER;
INTEGER(gid)[i] = NA_INTEGER;
SET_STRING_ELT(uname, i, NA_STRING);
SET_STRING_ELT(grname, i, NA_STRING);
#endif
}
}
setAttrib(ans, R_NamesSymbol, ansnames);
PROTECT(xxclass = allocVector(STRSXP, 1));
SET_STRING_ELT(xxclass, 0, mkChar("octmode"));
classgets(mode, xxclass);
UNPROTECT(3);
return ans;
}
#else
SEXP do_fileinfo(SEXP call, SEXP op, SEXP args, SEXP rho)
{
error("file.info is not implemented on this system");
return R_NilValue; /* -Wall */
}
#endif
#ifdef HAVE_ACCESS
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# endif
SEXP do_fileaccess(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, ans;
int i, n, mode, modemask;
checkArity(op, args);
fn = CAR(args);
if (!isString(fn))
errorcall(call, "invalid names argument");
n = length(fn);
mode = asInteger(CADR(args));
if(mode < 0 || mode > 7) error("invalid mode value");
modemask = 0;
if (mode & 1) modemask |= X_OK;
if (mode & 2) modemask |= W_OK;
if (mode & 4) modemask |= R_OK;
PROTECT(ans = allocVector(INTSXP, n));
for (i = 0; i < n; i++)
INTEGER(ans)[i] = access(R_ExpandFileName(CHAR(STRING_ELT(fn, i))),
modemask);
UNPROTECT(1);
return ans;
}
#else
SEXP do_fileaccess(SEXP call, SEXP op, SEXP args, SEXP rho)
{
error("file.access is not implemented on this system");
return R_NilValue; /* -Wall */
}
#endif
#ifdef HAVE_LOCALE_H
# include <locale.h>
#endif
SEXP do_getlocale(SEXP call, SEXP op, SEXP args, SEXP rho)
{
#ifdef HAVE_LOCALE_H
SEXP ans;
int cat;
char *p;
checkArity(op, args);
cat = asInteger(CAR(args));
if(cat == NA_INTEGER || cat < 0)
error("invalid `category' argument");
switch(cat) {
case 1: cat = LC_ALL; break;
case 2: cat = LC_COLLATE; break;
case 3: cat = LC_CTYPE; break;
case 4: cat = LC_MONETARY; break;
case 5: cat = LC_NUMERIC; break;
case 6: cat = LC_TIME; break;
}
p = setlocale(cat, NULL);
PROTECT(ans = allocVector(STRSXP, 1));
if(p) SET_STRING_ELT(ans, 0, mkChar(p));
else SET_STRING_ELT(ans, 0, mkChar(""));
UNPROTECT(1);
return ans;
#else
return R_NilValue;
#endif
}
SEXP do_setlocale(SEXP call, SEXP op, SEXP args, SEXP rho)
{
#ifdef HAVE_LOCALE_H
SEXP locale = CADR(args), ans;
int cat;
char *p;
checkArity(op, args);
cat = asInteger(CAR(args));
if(cat == NA_INTEGER || cat < 0)
error("invalid `category' argument");
if(!isString(locale) || LENGTH(locale) != 1)
error("invalid `locale' argument");
switch(cat) {
case 1: cat = LC_ALL; break;
case 2: cat = LC_COLLATE; break;
case 3: cat = LC_CTYPE; break;
case 4: cat = LC_MONETARY; break;
case 5: cat = LC_NUMERIC; break;
case 6: cat = LC_TIME; break;
}
p = setlocale(cat, CHAR(STRING_ELT(locale, 0)));
PROTECT(ans = allocVector(STRSXP, 1));
if(p) SET_STRING_ELT(ans, 0, mkChar(p));
else {
SET_STRING_ELT(ans, 0, mkChar(""));
warningcall(call, "OS reports request cannot be honored");
}
UNPROTECT(1);
return ans;
#else
return R_NilValue;
#endif
}
SEXP do_localeconv(SEXP call, SEXP op, SEXP args, SEXP rho)
{
#ifdef HAVE_LOCALE_H
SEXP ans, ansnames;
struct lconv *lc = localeconv();
int i = 0;
char buff[20];
PROTECT(ans = allocVector(STRSXP, 18));
PROTECT(ansnames = allocVector(STRSXP, 18));
SET_STRING_ELT(ans, i, mkChar(lc->decimal_point));
SET_STRING_ELT(ansnames, i++, mkChar("decimal_point"));
SET_STRING_ELT(ans, i, mkChar(lc->thousands_sep));
SET_STRING_ELT(ansnames, i++, mkChar("thousands_sep"));
SET_STRING_ELT(ans, i, mkChar(lc->grouping));
SET_STRING_ELT(ansnames, i++, mkChar("grouping"));
SET_STRING_ELT(ans, i, mkChar(lc->int_curr_symbol));
SET_STRING_ELT(ansnames, i++, mkChar("int_curr_symbol"));
SET_STRING_ELT(ans, i, mkChar(lc->currency_symbol));
SET_STRING_ELT(ansnames, i++, mkChar("currency_symbol"));
SET_STRING_ELT(ans, i, mkChar(lc->mon_decimal_point));
SET_STRING_ELT(ansnames, i++, mkChar("mon_decimal_point"));
SET_STRING_ELT(ans, i, mkChar(lc->mon_thousands_sep));
SET_STRING_ELT(ansnames, i++, mkChar("mon_thousands_sep"));
SET_STRING_ELT(ans, i, mkChar(lc->mon_grouping));
SET_STRING_ELT(ansnames, i++, mkChar("mon_grouping"));
SET_STRING_ELT(ans, i, mkChar(lc->positive_sign));
SET_STRING_ELT(ansnames, i++, mkChar("positive_sign"));
SET_STRING_ELT(ans, i, mkChar(lc->negative_sign));
SET_STRING_ELT(ansnames, i++, mkChar("negative_sign"));
sprintf(buff, "%d", (int)lc->int_frac_digits);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("int_frac_digits"));
sprintf(buff, "%d", (int)lc->frac_digits);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("frac_digits"));
sprintf(buff, "%d", (int)lc->p_cs_precedes);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("p_cs_precedes"));
sprintf(buff, "%d", (int)lc->p_sep_by_space);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("p_sep_by_space"));
sprintf(buff, "%d", (int)lc->n_cs_precedes);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("n_cs_precedes"));
sprintf(buff, "%d", (int)lc->n_sep_by_space);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("n_sep_by_space"));
sprintf(buff, "%d", (int)lc->p_sign_posn);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("p_sign_posn"));
sprintf(buff, "%d", (int)lc->n_sign_posn);
SET_STRING_ELT(ans, i, mkChar(buff));
SET_STRING_ELT(ansnames, i++, mkChar("n_sign_posn"));
setAttrib(ans, R_NamesSymbol, ansnames);
UNPROTECT(2);
return ans;
#else
return R_NilValue;
#endif
}
/* .Internal function for path.expand */
SEXP do_pathexpand(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, ans;
int i, n;
checkArity(op, args);
fn = CAR(args);
if (!isString(fn))
errorcall(call, "invalid path argument");
n = length(fn);
PROTECT(ans = allocVector(STRSXP, n));
for (i = 0; i < n; i++)
SET_STRING_ELT(ans, i,
mkChar(R_ExpandFileName(CHAR(STRING_ELT(fn, i)))));
UNPROTECT(1);
return ans;
}
SEXP do_capabilities(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans, ansnames;
int i = 0;
checkArity(op, args);
PROTECT(ans = allocVector(LGLSXP, 12));
PROTECT(ansnames = allocVector(STRSXP, 12));
SET_STRING_ELT(ansnames, i, mkChar("jpeg"));
#ifdef HAVE_JPEG
#ifdef Unix
LOGICAL(ans)[i++] = strcmp(R_GUIType, "X11") == 0;
#else
LOGICAL(ans)[i++] = TRUE;
#endif
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("png"));
#ifdef HAVE_PNG
#ifdef Unix
LOGICAL(ans)[i++] = strcmp(R_GUIType, "X11") == 0;
#else
LOGICAL(ans)[i++] = TRUE;
#endif
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("tcltk"));
#ifdef HAVE_TCLTK
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("X11"));
#ifdef Unix
LOGICAL(ans)[i++] = strcmp(R_GUIType, "X11") == 0;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("GNOME"));
#ifdef Unix
LOGICAL(ans)[i++] = strcmp(R_GUIType, "GNOME") == 0;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("libz"));
#if defined(HAVE_ZLIB)
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("http/ftp"));
#if HAVE_INTERNET
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("sockets"));
#ifdef HAVE_SOCKETS
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("libxml"));
#ifdef SUPPORT_LIBXML
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
SET_STRING_ELT(ansnames, i, mkChar("fifo"));
#if defined(HAVE_MKFIFO) && defined(HAVE_FCNTL_H)
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
/* This one is complex. Set it to be true only in interactive use,
with any of the GUIs or under Unix if readline is available and in
use */
SET_STRING_ELT(ansnames, i, mkChar("cledit"));
LOGICAL(ans)[i] = FALSE;
#if defined(Win32) || defined(Macintosh)
if(R_Interactive) LOGICAL(ans)[i] = TRUE;
#endif
#ifdef Unix
if(strcmp(R_GUIType, "GNOME") == 0) {
if(R_Interactive) LOGICAL(ans)[i] = TRUE;
} else {
#ifdef HAVE_LIBREADLINE
extern Rboolean UsingReadline;
if(R_Interactive && UsingReadline) LOGICAL(ans)[i] = TRUE;
#endif
}
#endif
i++;
SET_STRING_ELT(ansnames, i, mkChar("IEEE754"));
#if defined(IEEE_754)
LOGICAL(ans)[i++] = TRUE;
#else
LOGICAL(ans)[i++] = FALSE;
#endif
setAttrib(ans, R_NamesSymbol, ansnames);
UNPROTECT(2);
return ans;
}
#if defined(HAVE_BSD_NETWORKING) && defined(HAVE_ARPA_INET_H)
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
SEXP do_nsl(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans = R_NilValue;
char *name, ip[] = "xxx.xxx.xxx.xxx";
struct hostent *hp;
checkArity(op, args);
if(!isString(CAR(args)) || length(CAR(args)) != 1)
error("hostname must be a character vector of length 1");
name = CHAR(STRING_ELT(CAR(args), 0));
hp = gethostbyname(name);
if(hp == NULL) { /* cannot resolve the address */