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/*
*
* Copyright (c) 2019, cPanel, LLC.
* All rights reserved.
* http://cpanel.net
*
* This is free software; you can redistribute it and/or modify it under the
* same terms as Perl itself.
*
*/
#include <EXTERN.h>
#include <perl.h>
#include <XSUB.h>
#include <embed.h>
#include <string.h>
#include "ppport.h"
/* stolen from B::cstring */
static SV *
cstring(pTHX_ SV *sv, bool perlstyle)
{
SV *sstr;
if (!SvOK(sv))
return newSVpvs_flags("0", SVs_TEMP);
sstr = newSVpvs_flags("\"", SVs_TEMP);
if (perlstyle && SvUTF8(sv)) {
SV *tmpsv = sv_newmortal(); /* Temporary SV to feed sv_uni_display */
const STRLEN len = SvCUR(sv);
const char *s = sv_uni_display(tmpsv, sv, 8*len, UNI_DISPLAY_QQ);
while (*s)
{
if (*s == '"')
sv_catpvs(sstr, "\\\"");
else if (*s == '$')
sv_catpvs(sstr, "\\$");
else if (*s == '@')
sv_catpvs(sstr, "\\@");
else if (*s == '\\')
{
if (memCHRs("nrftaebx\\",*(s+1)))
sv_catpvn(sstr, s++, 2);
else
sv_catpvs(sstr, "\\\\");
}
else /* should always be printable */
sv_catpvn(sstr, s, 1);
++s;
}
}
else
{
/* XXX Optimise? */
STRLEN len;
const char *s = SvPV(sv, len);
for (; len; len--, s++)
{
/* At least try a little for readability */
if (*s == '"')
sv_catpvs(sstr, "\\\"");
else if (*s == '\\')
sv_catpvs(sstr, "\\\\");
/* trigraphs - bleagh */
else if (!perlstyle && *s == '?' && len>=3 && s[1] == '?') {
Perl_sv_catpvf(aTHX_ sstr, "\\%03o", '?');
}
else if (perlstyle && *s == '$')
sv_catpvs(sstr, "\\$");
else if (perlstyle && *s == '@')
sv_catpvs(sstr, "\\@");
else if (isPRINT(*s))
sv_catpvn(sstr, s, 1);
else if (*s == '\n')
sv_catpvs(sstr, "\\n");
else if (*s == '\r')
sv_catpvs(sstr, "\\r");
else if (*s == '\t')
sv_catpvs(sstr, "\\t");
else if (*s == '\a')
sv_catpvs(sstr, "\\a");
else if (*s == '\b')
sv_catpvs(sstr, "\\b");
else if (*s == '\f')
sv_catpvs(sstr, "\\f");
else if (!perlstyle && *s == '\v')
sv_catpvs(sstr, "\\v");
else
{
/* Don't want promotion of a signed -1 char in sprintf args */
const unsigned char c = (unsigned char) *s;
Perl_sv_catpvf(aTHX_ sstr, "\\%03o", c);
}
/* XXX Add line breaks if string is long */
}
}
sv_catpvs(sstr, "\"");
return sstr;
}
MODULE = XString PACKAGE = XString
void
cstring(sv)
SV * sv
ALIAS:
perlstring = 1
PPCODE:
PUSHs( cstring(aTHX_ sv, (bool)ix) );
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