/
platform.c
1762 lines (1616 loc) · 48.5 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, 2001-7 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., 51 Franklin Street Fifth Floor, Boston, MA 02110-1301 USA
*/
/* <UTF8> char here is either ASCII or handled as a whole */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <Defn.h>
#include <Rinterface.h>
#include <Fileio.h>
#include <R_ext/Applic.h> /* machar */
#include <time.h>
#ifdef HAVE_ERRNO_H
# include <errno.h>
#endif
/* Machine Constants */
static void Init_R_Machine(SEXP rho)
{
SEXP ans, nms;
machar(&R_AccuracyInfo.ibeta,
&R_AccuracyInfo.it,
&R_AccuracyInfo.irnd,
&R_AccuracyInfo.ngrd,
&R_AccuracyInfo.machep,
&R_AccuracyInfo.negep,
&R_AccuracyInfo.iexp,
&R_AccuracyInfo.minexp,
&R_AccuracyInfo.maxexp,
&R_AccuracyInfo.eps,
&R_AccuracyInfo.epsneg,
&R_AccuracyInfo.xmin,
&R_AccuracyInfo.xmax);
R_dec_min_exponent = floor(log10(R_AccuracyInfo.xmin)); /* smallest decimal exponent */
PROTECT(ans = allocVector(VECSXP, 18));
PROTECT(nms = allocVector(STRSXP, 18));
SET_STRING_ELT(nms, 0, mkChar("double.eps"));
SET_VECTOR_ELT(ans, 0, ScalarReal(R_AccuracyInfo.eps));
SET_STRING_ELT(nms, 1, mkChar("double.neg.eps"));
SET_VECTOR_ELT(ans, 1, ScalarReal(R_AccuracyInfo.epsneg));
SET_STRING_ELT(nms, 2, mkChar("double.xmin"));
SET_VECTOR_ELT(ans, 2, ScalarReal(R_AccuracyInfo.xmin));
SET_STRING_ELT(nms, 3, mkChar("double.xmax"));
SET_VECTOR_ELT(ans, 3, ScalarReal(R_AccuracyInfo.xmax));
SET_STRING_ELT(nms, 4, mkChar("double.base"));
SET_VECTOR_ELT(ans, 4, ScalarInteger(R_AccuracyInfo.ibeta));
SET_STRING_ELT(nms, 5, mkChar("double.digits"));
SET_VECTOR_ELT(ans, 5, ScalarInteger(R_AccuracyInfo.it));
SET_STRING_ELT(nms, 6, mkChar("double.rounding"));
SET_VECTOR_ELT(ans, 6, ScalarInteger(R_AccuracyInfo.irnd));
SET_STRING_ELT(nms, 7, mkChar("double.guard"));
SET_VECTOR_ELT(ans, 7, ScalarInteger(R_AccuracyInfo.ngrd));
SET_STRING_ELT(nms, 8, mkChar("double.ulp.digits"));
SET_VECTOR_ELT(ans, 8, ScalarInteger(R_AccuracyInfo.machep));
SET_STRING_ELT(nms, 9, mkChar("double.neg.ulp.digits"));
SET_VECTOR_ELT(ans, 9, ScalarInteger(R_AccuracyInfo.negep));
SET_STRING_ELT(nms, 10, mkChar("double.exponent"));
SET_VECTOR_ELT(ans, 10, ScalarInteger(R_AccuracyInfo.iexp));
SET_STRING_ELT(nms, 11, mkChar("double.min.exp"));
SET_VECTOR_ELT(ans, 11, ScalarInteger(R_AccuracyInfo.minexp));
SET_STRING_ELT(nms, 12, mkChar("double.max.exp"));
SET_VECTOR_ELT(ans, 12, ScalarInteger(R_AccuracyInfo.maxexp));
SET_STRING_ELT(nms, 13, mkChar("integer.max"));
SET_VECTOR_ELT(ans, 13, ScalarInteger(INT_MAX));
SET_STRING_ELT(nms, 14, mkChar("sizeof.long"));
SET_VECTOR_ELT(ans, 14, ScalarInteger(SIZEOF_LONG));
SET_STRING_ELT(nms, 15, mkChar("sizeof.longlong"));
SET_VECTOR_ELT(ans, 15, ScalarInteger(SIZEOF_LONG_LONG));
SET_STRING_ELT(nms, 16, mkChar("sizeof.longdouble"));
SET_VECTOR_ELT(ans, 16, ScalarInteger(SIZEOF_LONG_DOUBLE));
SET_STRING_ELT(nms, 17, mkChar("sizeof.pointer"));
SET_VECTOR_ELT(ans, 17, ScalarInteger(sizeof(SEXP)));
setAttrib(ans, R_NamesSymbol, nms);
defineVar(install(".Machine"), ans, rho);
UNPROTECT(2);
}
/* 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 const char * const R_OSType = OSTYPE;
static const char * const R_FileSep = FILESEP;
static void Init_R_Platform(SEXP rho)
{
SEXP value, names;
PROTECT(value = allocVector(VECSXP, 8));
PROTECT(names = allocVector(STRSXP, 8));
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_STRING_ELT(names, 5, mkChar("pkgType"));
SET_STRING_ELT(names, 6, mkChar("path.sep"));
SET_STRING_ELT(names, 7, mkChar("r_arch"));
SET_VECTOR_ELT(value, 0, mkString(R_OSType));
SET_VECTOR_ELT(value, 1, mkString(R_FileSep));
SET_VECTOR_ELT(value, 2, mkString(SHLIB_EXT));
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
#ifdef Win32
SET_VECTOR_ELT(value, 5, mkString("win.binary"));
#else /* not Win32 */
#ifdef HAVE_AQUA
SET_VECTOR_ELT(value, 5, mkString("mac.binary"));
#else /* not Win32 nor Aqua */
SET_VECTOR_ELT(value, 5, mkString("source"));
#endif
#endif
#ifdef Win32
SET_VECTOR_ELT(value, 6, mkString(";"));
#else /* not Win32 */
SET_VECTOR_ELT(value, 6, mkString(":"));
#endif
#ifdef R_ARCH
SET_VECTOR_ELT(value, 7, mkString(R_ARCH));
#else
SET_VECTOR_ELT(value, 7, mkString(""));
#endif
setAttrib(value, R_NamesSymbol, names);
defineVar(install(".Platform"), value, rho);
UNPROTECT(2);
}
void attribute_hidden Init_R_Variables(SEXP rho)
{
Init_R_Machine(rho);
Init_R_Platform(rho);
}
/* 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.
*/
static 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 attribute_hidden do_date(SEXP call, SEXP op, SEXP args, SEXP rho)
{
checkArity(op, args);
return mkString(R_Date());
}
/* file.show
*
* Display file(s) so that a user can view it. The function calls
* "R_ShowFiles" which is a platform-dependent hook that arranges
* for the file(s) to be displayed.
*/
SEXP attribute_hidden do_fileshow(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, tl, hd, pg;
char **f, **h, *t, *pager;
Rboolean dl;
int i, n;
checkArity(op, args);
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)
error(_("invalid filename specification"));
if (!isString(hd) || length(hd) != n)
error(_("invalid 'headers'"));
if (!isString(tl))
error(_("invalid 'title'"));
if (!isString(pg))
error(_("invalid '%s' specification"), "pager");
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)))
/* Do better later for file names? */
f[i] = acopy_string(translateChar(STRING_ELT(fn, i)));
else
f[i] = acopy_string(CHAR(R_BlankString));
if (!isNull(STRING_ELT(hd, i)))
h[i] = acopy_string(translateChar(STRING_ELT(hd, i)));
else
h[i] = acopy_string(CHAR(R_BlankString));
}
if (length(tl) >= 1 || !isNull(STRING_ELT(tl, 0)))
t = acopy_string(translateChar(STRING_ELT(tl, 0)));
else
t = acopy_string(CHAR(R_BlankString));
if (length(pg) >= 1 || !isNull(STRING_ELT(pg, 0)))
pager = acopy_string(CHAR(STRING_ELT(pg, 0)));
else
pager = acopy_string(CHAR(R_BlankString));
R_ShowFiles(n, f, h, t, dl, pager);
return R_NilValue;
}
/* file.edit
*
* Open a file in a text editor. The function calls
* "R_EditFiles" which is a platform dependent hook that invokes
* the given editor.
*
*/
SEXP attribute_hidden do_fileedit(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP fn, ti, ed;
char **f, **title, *editor;
int i, n;
checkArity(op, args);
fn = CAR(args); args = CDR(args);
ti = CAR(args); args = CDR(args);
ed = CAR(args);
n = length(fn);
if (!isString(ed))
error(_("invalid '%s' specification"), "editor");
if (n > 0) {
if (!isString(fn))
error(_("invalid '%s' specification"), "filename");
f = (char**) R_alloc(n, sizeof(char*));
title = (char**) R_alloc(n, sizeof(char*));
for (i = 0; i < n; i++) {
if (!isNull(STRING_ELT(fn, i)))
/* Do better later for file names? */
f[i] = acopy_string(translateChar(STRING_ELT(fn, i)));
else
f[i] = acopy_string(CHAR(R_BlankString));
if (!isNull(STRING_ELT(ti, i)))
title[i] = acopy_string(translateChar(STRING_ELT(ti, i)));
else
title[i] = acopy_string(CHAR(R_BlankString));
}
}
else { /* open a new file for editing */
n = 1;
f = (char**) R_alloc(1, sizeof(char*));
f[0] = acopy_string(CHAR(R_BlankString));
title = (char**) R_alloc(1, sizeof(char*));
title[0] = acopy_string(CHAR(R_BlankString));
}
if (length(ed) >= 1 || !isNull(STRING_ELT(ed, 0)))
/* Do better later for file names? */
editor = acopy_string(translateChar(STRING_ELT(ed, 0)));
else
editor = acopy_string(CHAR(R_BlankString));
R_EditFiles(n, f, title, editor);
return R_NilValue;
}
/* append.file
*
* Given two file names as arguments and arranges for
* the second file to be appended to the second.
* op = 2 is codeFiles.append.
*/
#if defined(BUFSIZ) && (BUFSIZ > 512)
/* OS's buffer size in stdio.h, probably.
Windows has 512, Solaris 1024, glibc 8192
*/
# define APPENDBUFSIZE BUFSIZ
#else
# define APPENDBUFSIZE 512
#endif
static int R_AppendFile(SEXP file1, SEXP file2)
{
FILE *fp1, *fp2;
char buf[APPENDBUFSIZE];
int nchar, status = 0;
if((fp1 = RC_fopen(file1, "ab", TRUE)) == NULL) {
return 0;
}
if((fp2 = RC_fopen(file2, "rb", TRUE)) == 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 attribute_hidden 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))
error(_("invalid first filename"));
if (!isString(f2))
error(_("invalid second filename"));
if (n1 < 1)
error(_("nothing to append to"));
if (PRIMVAL(op) > 0 && n1 > 1)
error(_("'outFile' must be a single file"));
if (n2 < 1)
return allocVector(LGLSXP, 0);
n = (n1 > n2) ? n1 : n2;
PROTECT(ans = allocVector(LGLSXP, n)); /* all FALSE */
if (n1 == 1) { /* common case */
FILE *fp1, *fp2;
char buf[APPENDBUFSIZE];
int nchar, status = 0;
if(!(fp1 = RC_fopen(STRING_ELT(f1, 0), "ab", TRUE)))
goto done;
for(i = 0; i < n; i++) {
status = 0;
if(!(fp2 = RC_fopen(STRING_ELT(f2, i), "rb", TRUE))) continue;
if(PRIMVAL(op) == 1) {
strcpy(buf, "#line 1 \"");
strcat(buf, CHAR(STRING_ELT(f2, i)));
strcat(buf, "\"\n");
fwrite(buf, 1, strlen(buf), fp2);
}
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;
if(PRIMVAL(op) == 1 && buf[nchar - 1] != '\n') {
if(fwrite("\n", 1, 1, fp1) != 1) goto append_error;
}
status = 1;
append_error:
if (status == 0)
warning(_("write error during file append"));
LOGICAL(ans)[i] = status;
fclose(fp2);
}
fclose(fp1);
} else {
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(STRING_ELT(f1, i%n1), STRING_ELT(f2, i%n2));
}
}
done:
UNPROTECT(1);
return ans;
}
SEXP attribute_hidden 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))
error(_("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 = RC_fopen(STRING_ELT(fn, i), "w", TRUE))
!= NULL) {
LOGICAL(ans)[i] = 1;
fclose(fp);
}
}
UNPROTECT(1);
return ans;
}
SEXP attribute_hidden 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))
error(_("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(translateChar(STRING_ELT(f, i)))) == 0);
}
UNPROTECT(1);
return ans;
}
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for symlink */
#endif
SEXP attribute_hidden do_filesymlink(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP f1, f2;
int n, n1, n2;
#ifdef HAVE_SYMLINK
SEXP ans;
int i;
char from[PATH_MAX], to[PATH_MAX];
const char *p;
#endif
checkArity(op, args);
f1 = CAR(args); n1 = length(f1);
f2 = CADR(args); n2 = length(f2);
if (!isString(f1))
error(_("invalid first filename"));
if (!isString(f2))
error(_("invalid second filename"));
if (n1 < 1)
error(_("nothing to link"));
if (n2 < 1)
return allocVector(LGLSXP, 0);
n = (n1 > n2) ? n1 : n2;
#ifdef HAVE_SYMLINK
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 {
p = R_ExpandFileName(translateChar(STRING_ELT(f1, i%n1)));
if (strlen(p) >= PATH_MAX - 1) {
LOGICAL(ans)[i] = 0;
continue;
}
strcpy(from, p);
p = R_ExpandFileName(translateChar(STRING_ELT(f2, i%n2)));
if (strlen(p) >= PATH_MAX - 1) {
LOGICAL(ans)[i] = 0;
continue;
}
strcpy(to, p);
/* Rprintf("linking %s to %s\n", from, to); */
LOGICAL(ans)[i] = symlink(from, to) == 0;
}
}
UNPROTECT(1);
return ans;
#else
warning(_("symlinks are not supported on this platform"));
return allocVector(LGLSXP, n);
#endif
}
#ifdef Win32
int Rwin_rename(char *from, char *to); /* in src/gnuwin32/extra.c */
#endif
SEXP attribute_hidden do_filerename(SEXP call, SEXP op, SEXP args, SEXP rho)
{
char from[PATH_MAX], to[PATH_MAX];
const char *p;
checkArity(op, args);
if (TYPEOF(CAR(args)) != STRSXP || LENGTH(CAR(args)) != 1)
error(_("'source' must be a single string"));
p = R_ExpandFileName(translateChar(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 || LENGTH(CADR(args)) != 1)
error(_("'destination' must be a single string"));
p = R_ExpandFileName(translateChar(STRING_ELT(CADR(args), 0)));
if (strlen(p) >= PATH_MAX - 1)
error(_("expanded destination name too long"));
strncpy(to, p, PATH_MAX - 1);
#ifdef Win32
return Rwin_rename(from, to) == 0 ? mkTrue() : mkFalse();
#endif
return rename(from, to) == 0 ? mkTrue() : mkFalse();
}
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
# 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 attribute_hidden 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;
#ifdef Win32
struct _stati64 sb;
#else
struct stat sb;
#endif
checkArity(op, args);
fn = CAR(args);
if (!isString(fn))
error(_("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(REALSXP, 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 &&
#ifdef Win32
_stati64(R_ExpandFileName(translateChar(STRING_ELT(fn, i))), &sb)
#else
stat(R_ExpandFileName(translateChar(STRING_ELT(fn, i))), &sb)
#endif
== 0) {
REAL(fsize)[i] = (double) sb.st_size;
LOGICAL(isdir)[i] = (sb.st_mode & S_IFDIR) > 0;
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 {
REAL(fsize)[i] = NA_REAL;
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 = mkString("octmode"));
classgets(mode, xxclass);
UNPROTECT(3);
return ans;
}
/* No longer required by POSIX, but maybe on earlier OSes */
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#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>
#endif
#include "Rregex.h"
#define CBUFSIZE 2*PATH_MAX+1
static SEXP filename(const char *dir, const char *file)
{
SEXP ans;
char cbuf[CBUFSIZE];
if (dir) {
#ifdef Win32
switch (dir[strlen(dir)-1])
{
case '/':
case '\\':
case ':':
{
snprintf(cbuf, CBUFSIZE, "%s%s", dir, file);
ans = mkChar(cbuf);
break;
}
default:
#endif
snprintf(cbuf, CBUFSIZE, "%s%s%s", dir, R_FileSep, file);
ans = mkChar(cbuf);
#ifdef Win32
}
#endif
} else {
snprintf(cbuf, CBUFSIZE, "%s", file);
ans = mkChar(cbuf);
}
return ans;
}
static void count_files(const char *dnp, int *count,
int allfiles, int recursive, int pattern, regex_t reg)
{
DIR *dir;
struct dirent *de;
char p[PATH_MAX];
struct stat sb;
if (strlen(dnp) >= PATH_MAX) /* should not happen! */
error(_("directory/folder path name too long"));
if ((dir = opendir(dnp)) == NULL) {
warning(_("list.files: '%s' is not a readable directory"), dnp);
} else {
while ((de = readdir(dir))) {
if (allfiles || !R_HiddenFile(de->d_name)) {
if(recursive) {
snprintf(p, PATH_MAX, "%s%s%s", dnp,
R_FileSep, de->d_name);
stat(p, &sb);
if((sb.st_mode & S_IFDIR) > 0) {
if (strcmp(de->d_name, ".") && strcmp(de->d_name, ".."))
count_files(p, count, allfiles, recursive,
pattern, reg);
continue;
}
}
if (pattern) {
if(regexec(®, de->d_name, 0, NULL, 0) == 0) (*count)++;
} else (*count)++;
}
}
closedir(dir);
}
}
static void list_files(const char *dnp, const char *stem, int *count, SEXP ans,
int allfiles, int recursive, int pattern, regex_t reg)
{
DIR *dir;
struct dirent *de;
char p[PATH_MAX], stem2[PATH_MAX];
struct stat sb;
if ((dir = opendir(dnp)) != NULL) {
while ((de = readdir(dir))) {
if (allfiles || !R_HiddenFile(de->d_name)) {
if(recursive) {
snprintf(p, PATH_MAX, "%s%s%s", dnp,
R_FileSep, de->d_name);
stat(p, &sb);
if((sb.st_mode & S_IFDIR) > 0) {
if (strcmp(de->d_name, ".") &&
strcmp(de->d_name, "..")) {
if(stem)
snprintf(stem2, PATH_MAX, "%s%s%s", stem,
R_FileSep, de->d_name);
else
strcpy(stem2, de->d_name);
list_files(p, stem2, count, ans, allfiles,
recursive, pattern, reg);
}
continue;
}
}
if (pattern) {
if (regexec(®, de->d_name, 0, NULL, 0) == 0)
SET_STRING_ELT(ans, (*count)++,
filename(stem, de->d_name));
} else
SET_STRING_ELT(ans, (*count)++,
filename(stem, de->d_name));
}
}
closedir(dir);
}
}
SEXP attribute_hidden do_listfiles(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP d, p, ans;
int allfiles, fullnames, count, pattern, recursive;
int i, ndir;
const char *dnp;
regex_t reg;
checkArity(op, args);
d = CAR(args); args = CDR(args);
if (!isString(d))
error(_("invalid '%s' argument"), "directory");
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))
error(_("invalid '%s' argument"), "pattern");
allfiles = asLogical(CAR(args)); args = CDR(args);
fullnames = asLogical(CAR(args)); args = CDR(args);
recursive = asLogical(CAR(args));
ndir = length(d);
if (pattern && regcomp(®, translateChar(STRING_ELT(p, 0)), REG_EXTENDED))
error(_("invalid 'pattern' regular expression"));
count = 0;
for (i = 0; i < ndir ; i++) {
dnp = R_ExpandFileName(translateChar(STRING_ELT(d, i)));
count_files(dnp, &count, allfiles, recursive, pattern, reg);
}
PROTECT(ans = allocVector(STRSXP, count));
count = 0;
for (i = 0; i < ndir ; i++) {
dnp = R_ExpandFileName(translateChar(STRING_ELT(d, i)));
if (fullnames)
list_files(dnp, dnp, &count, ans, allfiles, recursive,
pattern, reg);
else
list_files(dnp, NULL, &count, ans, allfiles, recursive,
pattern, reg);
}
if (pattern)
regfree(®);
ssort(STRING_PTR(ans), count);
UNPROTECT(1);
return ans;
}
SEXP attribute_hidden 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 attribute_hidden do_fileexists(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP file, ans;
int i, nfile;
checkArity(op, args);
if (!isString(file = CAR(args)))
error(_("invalid '%s' argument"), "file");
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(translateChar(STRING_ELT(file, i)));
}
return ans;
}
/* <FIXME> can \n or \r occur as part of a MBCS extra bytes?
Not that I know of */
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 attribute_hidden 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 '%s' argument"), "topic");
path = CAR(args); args = CDR(args);
if(!isString(path) || length(path) < 1 || isNull(path))
error(_("invalid '%s' argument"), "path");
indexname = CAR(args); args = CDR(args);
if(!isString(indexname) || length(indexname) < 1 || isNull(indexname))
error(_("invalid '%s' argument"), "indexname");
sep = CAR(args); args = CDR(args);
if(!isString(sep) || length(sep) < 1 || isNull(sep))
error(_("invalid '%s' argument"), "sep");
type = CAR(args);
if(!isString(type) || length(type) < 1 || isNull(type))
error(_("invalid '%s' argument"), "type");
strcpy(ctype, CHAR(STRING_ELT(type, 0)));
snprintf(topicbuf, 256, "%s\t", translateChar(STRING_ELT(topic, 0)));
ltopicbuf = strlen(topicbuf);
npath = length(path);
for (i = 0; i < npath; i++) {
snprintf(linebuf, 256, "%s%s%s%s%s",
translateChar(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"))
snprintf(topicbuf, 256, "%s%s%s%s%s%s",
translateChar(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"html", CHAR(STRING_ELT(sep, 0)),
p, ".html");
else if (!strcmp(ctype, "R-ex"))
snprintf(topicbuf, 256, "%s%s%s%s%s%s",
translateChar(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"R-ex", CHAR(STRING_ELT(sep, 0)),
p, ".R");
else if (!strcmp(ctype, "latex"))
snprintf(topicbuf, 256, "%s%s%s%s%s%s",
translateChar(STRING_ELT(path, i)),
CHAR(STRING_ELT(sep, 0)),
"latex", CHAR(STRING_ELT(sep, 0)),
p, ".tex");
else /* type = "help" */
snprintf(topicbuf, 256, "%s%s%s%s%s",
translateChar(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 attribute_hidden 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)
error(_("file name too long"));
return mkString(R_ExpandFileName(buf));
}
/* needed for access, and perhaps for realpath */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef Win32
#define Raccess winAccess
extern int winAccess(const char *path, int mode);
#else
#define Raccess access
#endif
#ifdef HAVE_ACCESS
SEXP attribute_hidden 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))
error(_("invalid '%s' argument"), "names");
n = length(fn);
mode = asInteger(CADR(args));
if(mode < 0 || mode > 7) error(_("invalid '%s' value"), "mode");
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));