/* NB this is called by R.app even though it is in no public header, so
alter there if you alter this */
const char *EncodeElement(SEXP x, int indx, int quote, char cdec)
{
char dec[2];
dec[0] = cdec; dec[1] = '\0';
return EncodeElement0(x, indx, quote, dec);
}
SEXP attribute_hidden do_cat(SEXP call, SEXP op, SEXP args, SEXP rho)
{
cat_info ci;
RCNTXT cntxt;
SEXP objs, file, fill, sepr, labs, s;
int ifile;
Rconnection con;
int append;
int i, iobj, n, nobjs, pwidth, width, sepw, lablen, ntot, nlsep, nlines;
char buf[512];
const char *p = "";
checkArity(op, args);
/* Use standard printing defaults */
PrintDefaults();
objs = CAR(args);
args = CDR(args);
file = CAR(args);
ifile = asInteger(file);
con = getConnection(ifile);
if(!con->canwrite) /* if it is not open, we may not know yet */
error(_("cannot write to this connection"));
args = CDR(args);
sepr = CAR(args);
if (!isString(sepr))
error(_("invalid '%s' specification"), "sep");
nlsep = 0;
for (i = 0; i < LENGTH(sepr); i++)
if (strstr(CHAR(STRING_ELT(sepr, i)), "\n")) nlsep = 1; /* ASCII */
args = CDR(args);
fill = CAR(args);
if ((!isNumeric(fill) && !isLogical(fill)) || (length(fill) != 1))
error(_("invalid '%s' argument"), "fill");
if (isLogical(fill)) {
if (asLogical(fill) == 1)
pwidth = R_print.width;
else
pwidth = INT_MAX;
}
else pwidth = asInteger(fill);
if(pwidth <= 0) {
warning(_("non-positive 'fill' argument will be ignored"));
pwidth = INT_MAX;
}
args = CDR(args);
labs = CAR(args);
if (!isString(labs) && labs != R_NilValue)
error(_("invalid '%s' argument"), "labels");
lablen = length(labs);
args = CDR(args);
append = asLogical(CAR(args));
if (append == NA_LOGICAL)
error(_("invalid '%s' specification"), "append");
ci.wasopen = con->isopen;
ci.changedcon = switch_stdout(ifile, 0);
/* will open new connection if required, and check for writeable */
#ifdef Win32
/* do this after re-sinking output */
WinCheckUTF8();
#endif
ci.con = con;
/* set up a context which will close the connection if there is an error */
begincontext(&cntxt, CTXT_CCODE, R_NilValue, R_BaseEnv, R_BaseEnv,
R_NilValue, R_NilValue);
cntxt.cend = &cat_cleanup;
cntxt.cenddata = &ci;
nobjs = length(objs);
width = 0;
ntot = 0;
nlines = 0;
for (iobj = 0; iobj < nobjs; iobj++) {
s = VECTOR_ELT(objs, iobj);
if (iobj != 0 && !isNull(s))
cat_printsep(sepr, ntot++);
n = length(s);
/* 0-length objects are ignored */
if (n > 0) {
if (labs != R_NilValue && (iobj == 0)
&& (asInteger(fill) > 0)) {
Rprintf("%s ", trChar(STRING_ELT(labs, nlines % lablen)));
/* FIXME -- Rstrlen allows for double-width chars */
width += Rstrlen(STRING_ELT(labs, nlines % lablen), 0) + 1;
nlines++;
}
if (isString(s))
p = trChar(STRING_ELT(s, 0));
else if (isSymbol(s)) /* length 1 */
p = CHAR(PRINTNAME(s));
else if (isVectorAtomic(s)) {
/* Not a string, as that is covered above.
Thus the maximum size is about 60.
The copy is needed as cat_newline might reuse the buffer.
Use strncpy is in case these assumptions change.
*/
p = EncodeElement0(s, 0, 0, OutDec);
strncpy(buf, p, 512); buf[511] = '\0';
p = buf;
}
#ifdef fixed_cat
else if (isVectorList(s)) {
/* FIXME: call EncodeElement() for every element of s.
Real Problem: `s' can be large;
should do line breaking etc.. (buf is of limited size)
*/
}
#endif
else
errorcall(call,
_("argument %d (type '%s') cannot be handled by 'cat'"),
1+iobj, type2char(TYPEOF(s)));
/* FIXME : cat(...) should handle ANYTHING */
size_t w = strlen(p);
cat_sepwidth(sepr, &sepw, ntot);
if ((iobj > 0) && (width + w + sepw > pwidth)) {
cat_newline(labs, &width, lablen, nlines);
nlines++;
}
for (i = 0; i < n; i++, ntot++) {
Rprintf("%s", p);
width += (int)(w + sepw);
if (i < (n - 1)) {
cat_printsep(sepr, ntot);
if (isString(s))
p = trChar(STRING_ELT(s, i+1));
else {
p = EncodeElement0(s, i+1, 0, OutDec);
strncpy(buf, p, 512); buf[511] = '\0';
p = buf;
}
w = (int) strlen(p);
cat_sepwidth(sepr, &sepw, ntot);
/* This is inconsistent with the version above.
As from R 2.3.0, fill <= 0 is ignored. */
if ((width + w + sepw > pwidth) && pwidth) {
cat_newline(labs, &width, lablen, nlines);
nlines++;
}
} else ntot--; /* we don't print sep after last, so don't advance */
}
}
}
if ((pwidth != INT_MAX) || nlsep)
Rprintf("\n");
/* end the context after anything that could raise an error but before
doing the cleanup so the cleanup doesn't get done twice */
endcontext(&cntxt);
cat_cleanup(&ci);
return R_NilValue;
}
