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util.c
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util.c
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/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
* Copyright (C) 1997--2015 The R 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, a copy is available at
* https://www.R-project.org/Licenses/
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define R_USE_SIGNALS 1
#include <Defn.h>
#include <Internal.h>
#include <R_ext/Print.h>
#include <ctype.h> /* for isspace */
#include <float.h> /* for DBL_MAX */
#undef COMPILING_R
#define R_imax2(x, y) ((x < y) ? y : x)
#include <Print.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef Win32
void R_UTF8fixslash(char *s);
static void R_wfixslash(wchar_t *s);
#endif
#ifdef __cplusplus
#include "Clinkage.h"
extern "C" {
#endif
void F77_SYMBOL(rwarnc)(char *msg, int *nchar);
void NORET F77_SYMBOL(rexitc)(char *msg, int *nchar);
#ifdef __cplusplus
}
#endif
/* Many small functions are included from ../include/Rinlinedfuns.h */
attribute_hidden
Rboolean tsConform(SEXP x, SEXP y)
{
if ((x = getAttrib(x, R_TspSymbol)) != R_NilValue &&
(y = getAttrib(y, R_TspSymbol)) != R_NilValue) {
/* tspgets should enforce this, but prior to 2.4.0
had INTEGER() here */
if(TYPEOF(x) == REALSXP && TYPEOF(y) == REALSXP)
return REAL(x)[0] == REAL(x)[0] &&
REAL(x)[1] == REAL(x)[1] &&
REAL(x)[2] == REAL(x)[2];
/* else fall through */
}
return FALSE;
}
int nrows(SEXP s)
{
SEXP t;
if (isVector(s) || isList(s)) {
t = getAttrib(s, R_DimSymbol);
if (t == R_NilValue) return LENGTH(s);
return INTEGER(t)[0];
}
else if (isFrame(s)) {
return nrows(CAR(s));
}
else error(_("object is not a matrix"));
return -1;
}
int ncols(SEXP s)
{
SEXP t;
if (isVector(s) || isList(s)) {
t = getAttrib(s, R_DimSymbol);
if (t == R_NilValue) return 1;
if (LENGTH(t) >= 2) return INTEGER(t)[1];
/* This is a 1D (or possibly 0D array) */
return 1;
}
else if (isFrame(s)) {
return length(s);
}
else error(_("object is not a matrix"));
return -1;/*NOTREACHED*/
}
#ifdef UNUSED
const static char type_msg[] = "invalid type passed to internal function\n";
void internalTypeCheck(SEXP call, SEXP s, SEXPTYPE type)
{
if (TYPEOF(s) != type) {
if (call)
errorcall(call, type_msg);
else
error(type_msg);
}
}
#endif
const static char * const truenames[] = {
"T",
"True",
"TRUE",
"true",
(char *) NULL,
};
const static char * const falsenames[] = {
"F",
"False",
"FALSE",
"false",
(char *) NULL,
};
SEXP asChar(SEXP x)
{
if (isVectorAtomic(x) && XLENGTH(x) >= 1) {
int w, d, e, wi, di, ei;
char buf[MAXELTSIZE]; /* Probably 100 would suffice */
switch (TYPEOF(x)) {
case LGLSXP:
if (LOGICAL(x)[0] == NA_LOGICAL)
return NA_STRING;
if (LOGICAL(x)[0])
sprintf(buf, "TRUE");
else
sprintf(buf, "FALSE");
return mkChar(buf);
case INTSXP:
if (INTEGER(x)[0] == NA_INTEGER)
return NA_STRING;
snprintf(buf, MAXELTSIZE, "%d", INTEGER(x)[0]);
return mkChar(buf);
case REALSXP:
PrintDefaults();
formatReal(REAL(x), 1, &w, &d, &e, 0);
return mkChar(EncodeReal0(REAL(x)[0], w, d, e, OutDec));
case CPLXSXP:
PrintDefaults();
formatComplex(COMPLEX(x), 1, &w, &d, &e, &wi, &di, &ei, 0);
return mkChar(EncodeComplex(COMPLEX(x)[0], w, d, e, wi, di, ei, OutDec));
case STRSXP:
return STRING_ELT(x, 0);
default:
return NA_STRING;
}
} else if(TYPEOF(x) == CHARSXP) {
return x;
} else if(TYPEOF(x) == SYMSXP)
return PRINTNAME(x);
return NA_STRING;
}
Rboolean isUnordered(SEXP s)
{
return (TYPEOF(s) == INTSXP
&& inherits(s, "factor")
&& !inherits(s, "ordered"));
}
Rboolean isOrdered(SEXP s)
{
return (TYPEOF(s) == INTSXP
&& inherits(s, "factor")
&& inherits(s, "ordered"));
}
const static struct {
const char * const str;
const int type;
}
TypeTable[] = {
{ "NULL", NILSXP }, /* real types */
{ "symbol", SYMSXP },
{ "pairlist", LISTSXP },
{ "closure", CLOSXP },
{ "environment", ENVSXP },
{ "promise", PROMSXP },
{ "language", LANGSXP },
{ "special", SPECIALSXP },
{ "builtin", BUILTINSXP },
{ "char", CHARSXP },
{ "logical", LGLSXP },
{ "integer", INTSXP },
{ "double", REALSXP }, /*- "real", for R <= 0.61.x */
{ "complex", CPLXSXP },
{ "character", STRSXP },
{ "...", DOTSXP },
{ "any", ANYSXP },
{ "expression", EXPRSXP },
{ "list", VECSXP },
{ "externalptr", EXTPTRSXP },
{ "bytecode", BCODESXP },
{ "weakref", WEAKREFSXP },
{ "raw", RAWSXP },
{ "S4", S4SXP },
/* aliases : */
{ "numeric", REALSXP },
{ "name", SYMSXP },
{ (char *)NULL, -1 }
};
SEXPTYPE str2type(const char *s)
{
int i;
for (i = 0; TypeTable[i].str; i++) {
if (!strcmp(s, TypeTable[i].str))
return (SEXPTYPE) TypeTable[i].type;
}
/* SEXPTYPE is an unsigned int, so the compiler warns us w/o the cast. */
return (SEXPTYPE) -1;
}
static struct {
const char *cstrName;
SEXP rcharName;
SEXP rstrName;
SEXP rsymName;
} Type2Table[MAX_NUM_SEXPTYPE];
static int findTypeInTypeTable(SEXPTYPE t)
{
for (int i = 0; TypeTable[i].str; i++)
if (TypeTable[i].type == t) return i;
return -1;
}
// called from main.c
attribute_hidden
void InitTypeTables(void) {
/* Type2Table */
for (int type = 0; type < MAX_NUM_SEXPTYPE; type++) {
int j = findTypeInTypeTable(type);
if (j != -1) {
const char *cstr = TypeTable[j].str;
SEXP rchar = PROTECT(mkChar(cstr));
SEXP rstr = ScalarString(rchar);
MARK_NOT_MUTABLE(rstr);
R_PreserveObject(rstr);
UNPROTECT(1); /* rchar */
SEXP rsym = install(cstr);
Type2Table[type].cstrName = cstr;
Type2Table[type].rcharName = rchar;
Type2Table[type].rstrName = rstr;
Type2Table[type].rsymName = rsym;
} else {
Type2Table[type].cstrName = NULL;
Type2Table[type].rcharName = NULL;
Type2Table[type].rstrName = NULL;
Type2Table[type].rsymName = NULL;
}
}
}
SEXP type2str_nowarn(SEXPTYPE t) /* returns a CHARSXP */
{
if (t < MAX_NUM_SEXPTYPE) { /* FIXME: branch not really needed */
SEXP res = Type2Table[t].rcharName;
if (res != NULL) return res;
}
return R_NilValue;
}
SEXP type2str(SEXPTYPE t) /* returns a CHARSXP */
{
SEXP s = type2str_nowarn(t);
if (s != R_NilValue) {
return s;
}
warning(_("type %d is unimplemented in '%s'"), t, "type2str");
char buf[50];
snprintf(buf, 50, "unknown type #%d", t);
return mkChar(buf);
}
SEXP type2rstr(SEXPTYPE t) /* returns a STRSXP */
{
if (t < MAX_NUM_SEXPTYPE) { /* FIXME: branch not really needed */
SEXP res = Type2Table[t].rstrName;
if (res != NULL) return res;
}
error(_("type %d is unimplemented in '%s'"), t,
"type2ImmutableScalarString");
return R_NilValue; /* for -Wall */
}
const char *type2char(SEXPTYPE t) /* returns a char* */
{
if (t < MAX_NUM_SEXPTYPE) { /* FIXME: branch not really needed */
const char * res = Type2Table[t].cstrName;
if (res != NULL) return res;
}
warning(_("type %d is unimplemented in '%s'"), t, "type2char");
static char buf[50];
snprintf(buf, 50, "unknown type #%d", t);
return buf;
}
#ifdef UNUSED
SEXP NORET type2symbol(SEXPTYPE t)
{
if (t >= 0 && t < MAX_NUM_SEXPTYPE) { /* FIXME: branch not really needed */
SEXP res = Type2Table[t].rsymName;
if (res != NULL) {
return res;
}
}
error(_("type %d is unimplemented in '%s'"), t, "type2symbol");
}
#endif
attribute_hidden
void NORET UNIMPLEMENTED_TYPEt(const char *s, SEXPTYPE t)
{
int i;
for (i = 0; TypeTable[i].str; i++) {
if (TypeTable[i].type == t)
error(_("unimplemented type '%s' in '%s'\n"), TypeTable[i].str, s);
}
error(_("unimplemented type (%d) in '%s'\n"), t, s);
}
void NORET UNIMPLEMENTED_TYPE(const char *s, SEXP x)
{
UNIMPLEMENTED_TYPEt(s, TYPEOF(x));
}
# include <R_ext/Riconv.h>
# include <sys/param.h>
# include <errno.h>
/* Previous versions of R (< 2.3.0) assumed wchar_t was in Unicode
(and it commonly is). These functions do not. */
# ifdef WORDS_BIGENDIAN
static const char UCS2ENC[] = "UCS-2BE";
# else
static const char UCS2ENC[] = "UCS-2LE";
# endif
/*
* out=NULL returns the number of the MBCS chars
*/
/* Note: this does not terminate out, as all current uses are to look
* at 'out' a wchar at a time, and sometimes just one char.
*/
size_t mbcsToUcs2(const char *in, ucs2_t *out, int nout, int enc)
{
void *cd = NULL ;
const char *i_buf;
char *o_buf;
size_t i_len, o_len, status, wc_len;
/* out length */
wc_len = (enc == CE_UTF8)? utf8towcs(NULL, in, 0) : mbstowcs(NULL, in, 0);
if (out == NULL || (int)wc_len < 0) return wc_len;
if ((void*)-1 == (cd = Riconv_open(UCS2ENC, (enc == CE_UTF8) ? "UTF-8": "")))
return (size_t) -1;
i_buf = (char *)in;
i_len = strlen(in); /* not including terminator */
o_buf = (char *)out;
o_len = ((size_t) nout) * sizeof(ucs2_t);
status = Riconv(cd, &i_buf, (size_t *)&i_len, &o_buf, (size_t *)&o_len);
int serrno = errno;
Riconv_close(cd);
if (status == (size_t)-1) {
switch(serrno){
case EINVAL:
return (size_t) -2;
case EILSEQ:
return (size_t) -1;
case E2BIG:
break;
default:
errno = EILSEQ;
return (size_t) -1;
}
}
return wc_len; /* status would be better? */
}
#include <wctype.h>
/* This one is not in Rinternals.h, but is used in internet module */
Rboolean isBlankString(const char *s)
{
if(mbcslocale) {
wchar_t wc; size_t used; mbstate_t mb_st;
mbs_init(&mb_st);
while( (used = Mbrtowc(&wc, s, MB_CUR_MAX, &mb_st)) ) {
if(!iswspace((wint_t) wc)) return FALSE;
s += used;
}
} else
while (*s)
if (!isspace((int)*s++)) return FALSE;
return TRUE;
}
Rboolean StringBlank(SEXP x)
{
if (x == R_NilValue) return TRUE;
else return CHAR(x)[0] == '\0';
}
/* Function to test whether a string is a true value */
Rboolean StringTrue(const char *name)
{
int i;
for (i = 0; truenames[i]; i++)
if (!strcmp(name, truenames[i]))
return TRUE;
return FALSE;
}
Rboolean StringFalse(const char *name)
{
int i;
for (i = 0; falsenames[i]; i++)
if (!strcmp(name, falsenames[i]))
return TRUE;
return FALSE;
}
/* used in bind.c and options.c */
SEXP attribute_hidden EnsureString(SEXP s)
{
switch(TYPEOF(s)) {
case SYMSXP:
s = PRINTNAME(s);
break;
case STRSXP:
s = STRING_ELT(s, 0);
break;
case CHARSXP:
break;
case NILSXP:
s = R_BlankString;
break;
default:
error(_("invalid tag in name extraction"));
}
return s;
}
/* FIXME: ngettext reguires unsigned long, but %u would seem appropriate */
void Rf_checkArityCall(SEXP op, SEXP args, SEXP call)
{
if (PRIMARITY(op) >= 0 && PRIMARITY(op) != length(args)) {
if (PRIMINTERNAL(op))
error(ngettext("%d argument passed to .Internal(%s) which requires %d",
"%d arguments passed to .Internal(%s) which requires %d",
(unsigned long) length(args)),
length(args), PRIMNAME(op), PRIMARITY(op));
else
errorcall(call,
ngettext("%d argument passed to '%s' which requires %d",
"%d arguments passed to '%s' which requires %d",
(unsigned long) length(args)),
length(args), PRIMNAME(op), PRIMARITY(op));
}
}
void attribute_hidden Rf_check1arg(SEXP arg, SEXP call, const char *formal)
{
SEXP tag = TAG(arg);
const char *supplied;
size_t ns;
if (tag == R_NilValue) return;
supplied = CHAR(PRINTNAME(tag)); ns = strlen(supplied);
if (ns > strlen(formal) || strncmp(supplied, formal, ns))
errorcall(call, _("supplied argument name '%s' does not match '%s'"),
supplied, formal);
}
SEXP nthcdr(SEXP s, int n)
{
if (isList(s) || isLanguage(s) || isFrame(s) || TYPEOF(s) == DOTSXP ) {
while( n-- > 0 ) {
if (s == R_NilValue)
error(_("'nthcdr' list shorter than %d"), n);
s = CDR(s);
}
return s;
}
else error(_("'nthcdr' needs a list to CDR down"));
return R_NilValue;/* for -Wall */
}
/* This is a primitive (with no arguments) */
SEXP attribute_hidden do_nargs(SEXP call, SEXP op, SEXP args, SEXP rho)
{
RCNTXT *cptr;
int nargs = NA_INTEGER;
checkArity(op, args);
for (cptr = R_GlobalContext; cptr != NULL; cptr = cptr->nextcontext) {
if ((cptr->callflag & CTXT_FUNCTION) && cptr->cloenv == rho) {
nargs = length(cptr->promargs);
break;
}
}
return ScalarInteger(nargs);
}
/* formerly used in subscript.c, in Utils.h */
void attribute_hidden setIVector(int * vec, int len, int val)
{
for (int i = 0; i < len; i++) vec[i] = val;
}
/* unused in R, in Utils.h, apparently used in Rcpp */
void attribute_hidden setRVector(double * vec, int len, double val)
{
for (int i = 0; i < len; i++) vec[i] = val;
}
/* unused in R, in Rinternals.h */
void setSVector(SEXP * vec, int len, SEXP val)
{
for (int i = 0; i < len; i++) vec[i] = val;
}
Rboolean isFree(SEXP val)
{
SEXP t;
for (t = R_FreeSEXP; t != R_NilValue; t = CAR(t))
if (val == t)
return TRUE;
return FALSE;
}
/* Debugging functions (hence the d-prefix). */
/* These are intended to be called interactively from */
/* a debugger such as gdb, so you don't have to remember */
/* the names of the data structure components. */
int dtype(SEXP q)
{
return((int)TYPEOF(q));
}
SEXP dcar(SEXP l)
{
return(CAR(l));
}
SEXP dcdr(SEXP l)
{
return(CDR(l));
}
static void isort_with_index(int *x, int *indx, int n)
{
int i, j, h, iv, v;
for (h = 1; h <= n / 9; h = 3 * h + 1);
for (; h > 0; h /= 3)
for (i = h; i < n; i++) {
v = x[i]; iv = indx[i];
j = i;
while (j >= h && x[j - h] > v)
{ x[j] = x[j - h]; indx[j] = indx[j-h]; j -= h; }
x[j] = v; indx[j] = iv;
}
}
/* merge(xinds, yinds, all.x, all.y) */
/* xinds, yinds are along x and y rows matching into the (numeric)
common indices, with 0 for non-matches.
all.x and all.y are boolean.
The return value is a list with 4 elements (xi, yi, x.alone, y.alone),
which are index vectors for rows of x or y.
*/
SEXP attribute_hidden do_merge(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP xi, yi, ansx, ansy, ans;
int nx = 0, ny = 0, i, j, k, nx_lone = 0, ny_lone = 0;
int all_x = 0, all_y = 0, ll = 0/* "= 0" : for -Wall */;
int nnx, nny;
checkArity(op, args);
xi = CAR(args);
// NB: long vectors are not supported for input
if ( !isInteger(xi) || !(nx = LENGTH(xi)) )
error(_("invalid '%s' argument"), "xinds");
yi = CADR(args);
if ( !isInteger(yi) || !(ny = LENGTH(yi)) )
error(_("invalid '%s' argument"), "yinds");
if(!LENGTH(ans = CADDR(args)) || NA_LOGICAL == (all_x = asLogical(ans)))
error(_("'all.x' must be TRUE or FALSE"));
if(!LENGTH(ans = CADDDR(args))|| NA_LOGICAL == (all_y = asLogical(ans)))
error(_("'all.y' must be TRUE or FALSE"));
/* 0. sort the indices */
int *ix = (int *) R_alloc((size_t) nx, sizeof(int));
int *iy = (int *) R_alloc((size_t) ny, sizeof(int));
for(i = 0; i < nx; i++) ix[i] = i+1;
for(i = 0; i < ny; i++) iy[i] = i+1;
isort_with_index(INTEGER(xi), ix, nx);
isort_with_index(INTEGER(yi), iy, ny);
/* 1. determine result sizes */
for (i = 0; i < nx; i++) if (INTEGER(xi)[i] > 0) break; nx_lone = i;
for (i = 0; i < ny; i++) if (INTEGER(yi)[i] > 0) break; ny_lone = i;
double dnans = 0;
for (i = nx_lone, j = ny_lone; i < nx; i = nnx, j = nny) {
int tmp = INTEGER(xi)[i];
for(nnx = i; nnx < nx; nnx++) if(INTEGER(xi)[nnx] != tmp) break;
/* the next is not in theory necessary,
since we have the common values only */
for(; j < ny; j++) if(INTEGER(yi)[j] >= tmp) break;
for(nny = j; nny < ny; nny++) if(INTEGER(yi)[nny] != tmp) break;
/* printf("i %d nnx %d j %d nny %d\n", i, nnx, j, nny); */
dnans += ((double)(nnx-i))*(nny-j);
}
if (dnans > R_XLEN_T_MAX)
error(_("number of rows in the result exceeds maximum vector length"));
R_xlen_t nans = (int) dnans;
/* 2. allocate and store result components */
const char *nms[] = {"xi", "yi", "x.alone", "y.alone", ""};
ans = PROTECT(mkNamed(VECSXP, nms));
ansx = allocVector(INTSXP, nans); SET_VECTOR_ELT(ans, 0, ansx);
ansy = allocVector(INTSXP, nans); SET_VECTOR_ELT(ans, 1, ansy);
if(all_x) {
SEXP x_lone = allocVector(INTSXP, nx_lone);
SET_VECTOR_ELT(ans, 2, x_lone);
for (i = 0, ll = 0; i < nx_lone; i++)
INTEGER(x_lone)[ll++] = ix[i];
}
if(all_y) {
SEXP y_lone = allocVector(INTSXP, ny_lone);
SET_VECTOR_ELT(ans, 3, y_lone);
for (i = 0, ll = 0; i < ny_lone; i++)
INTEGER(y_lone)[ll++] = iy[i];
}
for (i = nx_lone, j = ny_lone, k = 0; i < nx; i = nnx, j = nny) {
int tmp = INTEGER(xi)[i];
for(nnx = i; nnx < nx; nnx++) if(INTEGER(xi)[nnx] != tmp) break;
for(; j < ny; j++) if(INTEGER(yi)[j] >= tmp) break;
for(nny = j; nny < ny; nny++) if(INTEGER(yi)[nny] != tmp) break;
for(int i0 = i; i0 < nnx; i0++)
for(int j0 = j; j0 < nny; j0++) {
INTEGER(ansx)[k] = ix[i0];
INTEGER(ansy)[k++] = iy[j0];
}
}
UNPROTECT(1);
return ans;
}
/* Functions for getting and setting the working directory. */
#ifdef Win32
# define WIN32_LEAN_AND_MEAN 1
# include <windows.h>
#endif
SEXP static intern_getwd(void)
{
SEXP rval = R_NilValue;
char buf[4*PATH_MAX+1];
#ifdef Win32
{
wchar_t wbuf[PATH_MAX+1];
int res = GetCurrentDirectoryW(PATH_MAX, wbuf);
if(res > 0) {
wcstoutf8(buf, wbuf, PATH_MAX+1);
R_UTF8fixslash(buf);
PROTECT(rval = allocVector(STRSXP, 1));
SET_STRING_ELT(rval, 0, mkCharCE(buf, CE_UTF8));
UNPROTECT(1);
}
}
#else
char *res = getcwd(buf, PATH_MAX); /* can return NULL */
if(res) rval = mkString(buf);
#endif
return(rval);
}
SEXP attribute_hidden do_getwd(SEXP call, SEXP op, SEXP args, SEXP rho)
{
checkArity(op, args);
return(intern_getwd());
}
#if defined(Win32) && defined(_MSC_VER)
# include <direct.h> /* for chdir, via io.h */
#endif
SEXP attribute_hidden do_setwd(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP s = R_NilValue, wd = R_NilValue; /* -Wall */
checkArity(op, args);
if (!isPairList(args) || !isValidString(s = CAR(args)))
error(_("character argument expected"));
if (STRING_ELT(s, 0) == NA_STRING)
error(_("missing value is invalid"));
/* get current directory to return */
PROTECT(wd = intern_getwd());
#ifdef Win32
{
const wchar_t *path = filenameToWchar(STRING_ELT(s, 0), TRUE);
if(_wchdir(path) < 0)
error(_("cannot change working directory"));
}
#else
{
const char *path
= R_ExpandFileName(translateChar(STRING_ELT(s, 0)));
if(chdir(path) < 0)
error(_("cannot change working directory"));
}
#endif
UNPROTECT(1); /* wd */
return(wd);
}
/* remove portion of path before file separator if one exists */
#ifdef Win32
SEXP attribute_hidden do_basename(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans, s = R_NilValue; /* -Wall */
char sp[4*PATH_MAX];
wchar_t buf[PATH_MAX], *p;
const wchar_t *pp;
int i, n;
checkArity(op, args);
if (TYPEOF(s = CAR(args)) != STRSXP)
error(_("a character vector argument expected"));
PROTECT(ans = allocVector(STRSXP, n = LENGTH(s)));
for(i = 0; i < n; i++) {
if (STRING_ELT(s, i) == NA_STRING)
SET_STRING_ELT(ans, i, NA_STRING);
else {
pp = filenameToWchar(STRING_ELT(s, i), TRUE);
if (wcslen(pp) > PATH_MAX - 1) error(_("path too long"));
wcscpy(buf, pp);
R_wfixslash(buf);
/* remove trailing file separator(s) */
if (*buf) {
p = buf + wcslen(buf) - 1;
while (p >= buf && *p == L'/') *(p--) = L'\0';
}
if ((p = wcsrchr(buf, L'/'))) p++; else p = buf;
memset(sp, 0, 4*PATH_MAX); /* safety */
wcstoutf8(sp, p, 4*wcslen(p) + 1);
SET_STRING_ELT(ans, i, mkCharCE(sp, CE_UTF8));
}
}
UNPROTECT(1);
return(ans);
}
#else
SEXP attribute_hidden do_basename(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans, s = R_NilValue; /* -Wall */
char buf[PATH_MAX], *p, fsp = FILESEP[0];
const char *pp;
int i, n;
checkArity(op, args);
if (TYPEOF(s = CAR(args)) != STRSXP)
error(_("a character vector argument expected"));
PROTECT(ans = allocVector(STRSXP, n = LENGTH(s)));
for(i = 0; i < n; i++) {
if (STRING_ELT(s, i) == NA_STRING)
SET_STRING_ELT(ans, i, NA_STRING);
else {
pp = R_ExpandFileName(translateChar(STRING_ELT(s, i)));
if (strlen(pp) > PATH_MAX - 1)
error(_("path too long"));
strcpy (buf, pp);
if (*buf) {
p = buf + strlen(buf) - 1;
while (p >= buf && *p == fsp) *(p--) = '\0';
}
if ((p = Rf_strrchr(buf, fsp)))
p++;
else
p = buf;
SET_STRING_ELT(ans, i, mkChar(p));
}
}
UNPROTECT(1);
return(ans);
}
#endif
/* remove portion of path after last file separator if one exists, else
return "."
*/
#ifdef Win32
SEXP attribute_hidden do_dirname(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans, s = R_NilValue; /* -Wall */
wchar_t buf[PATH_MAX], *p;
const wchar_t *pp;
char sp[4*PATH_MAX];
int i, n;
checkArity(op, args);
if (TYPEOF(s = CAR(args)) != STRSXP)
error(_("a character vector argument expected"));
PROTECT(ans = allocVector(STRSXP, n = LENGTH(s)));
for(i = 0; i < n; i++) {
if (STRING_ELT(s, i) == NA_STRING)
SET_STRING_ELT(ans, i, NA_STRING);
else {
memset(sp, 0, 4*PATH_MAX);
pp = filenameToWchar(STRING_ELT(s, i), TRUE);
if (wcslen(pp) > PATH_MAX - 1)
error(_("path too long"));
if (wcslen(pp)) {
wcscpy (buf, pp);
R_wfixslash(buf);
/* remove trailing file separator(s) */
while ( *(p = buf + wcslen(buf) - 1) == L'/' && p > buf
&& (p > buf+2 || *(p-1) != L':')) *p = L'\0';
p = wcsrchr(buf, L'/');
if(p == NULL) wcscpy(buf, L".");
else {
while(p > buf && *p == L'/'
/* this covers both drives and network shares */
&& (p > buf+2 || *(p-1) != L':')) --p;
p[1] = L'\0';
}
wcstoutf8(sp, buf, 4*wcslen(buf)+1);
}
SET_STRING_ELT(ans, i, mkCharCE(sp, CE_UTF8));
}
}
UNPROTECT(1);
return(ans);
}
#else
SEXP attribute_hidden do_dirname(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans, s = R_NilValue; /* -Wall */
char buf[PATH_MAX], *p, fsp = FILESEP[0];
const char *pp;
int i, n;
checkArity(op, args);
if (TYPEOF(s = CAR(args)) != STRSXP)
error(_("a character vector argument expected"));
PROTECT(ans = allocVector(STRSXP, n = LENGTH(s)));
for(i = 0; i < n; i++) {
if (STRING_ELT(s, i) == NA_STRING)
SET_STRING_ELT(ans, i, NA_STRING);
else {
pp = R_ExpandFileName(translateChar(STRING_ELT(s, i)));
if (strlen(pp) > PATH_MAX - 1)
error(_("path too long"));
size_t ll = strlen(pp);
if (ll) { // svMisc calls this with ""
strcpy (buf, pp);
/* remove trailing file separator(s) */
while ( *(p = buf + ll - 1) == fsp && p > buf) *p = '\0';
p = Rf_strrchr(buf, fsp);
if(p == NULL)
strcpy(buf, ".");
else {
while(p > buf && *p == fsp) --p;
p[1] = '\0';
}
} else buf[0] = '\0';
SET_STRING_ELT(ans, i, mkChar(buf));
}
}
UNPROTECT(1);
return(ans);
}
#endif
#ifndef Win32 /* Windows version is in src/gnuwin32/extra.c */
#ifndef HAVE_DECL_REALPATH
extern char *realpath(const char *path, char *resolved_path);
#endif
SEXP attribute_hidden do_normalizepath(SEXP call, SEXP op, SEXP args, SEXP rho)
{
SEXP ans, paths = CAR(args);
int i, n = LENGTH(paths);
const char *path;
char abspath[PATH_MAX+1];
checkArity(op, args);
if (!isString(paths))
error(_("'path' must be a character vector"));
int mustWork = asLogical(CADDR(args)); /* 1, NA_LOGICAL or 0 */
/* Does any platform not have this? */
#ifdef HAVE_REALPATH
PROTECT(ans = allocVector(STRSXP, n));
for (i = 0; i < n; i++) {
path = translateChar(STRING_ELT(paths, i));
char *res = realpath(path, abspath);
if (res)
SET_STRING_ELT(ans, i, mkChar(abspath));
else {
SET_STRING_ELT(ans, i, STRING_ELT(paths, i));
/* and report the problem */
if (mustWork == 1)
error("path[%d]=\"%s\": %s", i+1, path, strerror(errno));
else if (mustWork == NA_LOGICAL)
warning("path[%d]=\"%s\": %s", i+1, path, strerror(errno));
}
}
#else
Rboolean OK;
warning("this platform does not have realpath so the results may not be canonical");
PROTECT(ans = allocVector(STRSXP, n));
for (i = 0; i < n; i++) {
path = translateChar(STRING_ELT(paths, i));
OK = strlen(path) <= PATH_MAX;
if (OK) {
if (path[0] == '/') strncpy(abspath, path, PATH_MAX);
else {
OK = getcwd(abspath, PATH_MAX) != NULL;
OK = OK && (strlen(path) + strlen(abspath) + 1 <= PATH_MAX);
if (OK) {strcat(abspath, "/"); strcat(abspath, path);}
}
}
/* we need to check that this exists */
if (OK) OK = (access(abspath, 0 /* F_OK */) == 0);
if (OK) SET_STRING_ELT(ans, i, mkChar(abspath));
else {
SET_STRING_ELT(ans, i, STRING_ELT(paths, i));
/* and report the problem */
if (mustWork == 1)