mod_export char *
parse_subscript(char *s, int sub)
{
int l = strlen(s), err;
char *t;
if (!*s || *s == ']')
return 0;
lexsave();
untokenize(t = dupstring(s));
inpush(t, 0, NULL);
strinbeg(0);
len = 0;
bptr = tokstr = s;
bsiz = l + 1;
err = dquote_parse(']', sub);
if (err) {
err = *bptr;
*bptr = 0;
untokenize(s);
*bptr = err;
s = 0;
} else
s = bptr;
strinend();
inpop();
DPUTS(cmdsp, "BUG: parse_subscript: cmdstack not empty.");
lexrestore();
return s;
}
mod_export char *
parse_subscript(char *s, int sub, int endchar)
{
int l = strlen(s), err;
char *t;
if (!*s || *s == endchar)
return 0;
zcontext_save();
untokenize(t = dupstring(s));
inpush(t, 0, NULL);
strinbeg(0);
lexbuf.len = 0;
lexbuf.ptr = tokstr = s;
lexbuf.siz = l + 1;
err = dquote_parse(endchar, sub);
if (err) {
err = *lexbuf.ptr;
*lexbuf.ptr = '\0';
untokenize(s);
*lexbuf.ptr = err;
s = NULL;
} else {
s = lexbuf.ptr;
}
strinend();
inpop();
DPUTS(cmdsp, "BUG: parse_subscript: cmdstack not empty.");
zcontext_restore();
return s;
}
mod_export char *
parse_subscript(char *s, int sub, int endchar)
{
int l = strlen(s), err, toklen;
char *t;
if (!*s || *s == endchar)
return 0;
zcontext_save();
untokenize(t = dupstring(s));
inpush(t, 0, NULL);
strinbeg(0);
/*
* Warning to Future Generations:
*
* This way of passing the subscript through the lexer is brittle.
* Code above this for several layers assumes that when we tokenise
* the input it goes into the same place as the original string.
* However, the lexer may overwrite later bits of the string or
* reallocate it, in particular when expanding aliaes. To get
* around this, we copy the string and then copy it back. This is a
* bit more robust but still relies on the underlying assumption of
* length preservation.
*/
lexbuf.len = 0;
lexbuf.ptr = tokstr = dupstring(s);
lexbuf.siz = l + 1;
err = dquote_parse(endchar, sub);
toklen = (int)(lexbuf.ptr - tokstr);
DPUTS(toklen > l, "Bad length for parsed subscript");
memcpy(s, tokstr, toklen);
if (err) {
char *strend = s + toklen;
err = *strend;
*strend = '\0';
untokenize(s);
*strend = err;
s = NULL;
} else {
s += toklen;
}
strinend();
inpop();
DPUTS(cmdsp, "BUG: parse_subscript: cmdstack not empty.");
zcontext_restore();
return s;
}
mod_export int
parsestrnoerr(char *s)
{
int l = strlen(s), err;
lexsave();
untokenize(s);
inpush(dupstring(s), 0, NULL);
strinbeg(0);
len = 0;
bptr = tokstr = s;
bsiz = l + 1;
err = dquote_parse('\0', 1);
*bptr = '\0';
strinend();
inpop();
DPUTS(cmdsp, "BUG: parsestr: cmdstack not empty.");
lexrestore();
return err;
}
mod_export int
parsestrnoerr(char **s)
{
int l = strlen(*s), err;
zcontext_save();
untokenize(*s);
inpush(dupstring(*s), 0, NULL);
strinbeg(0);
lexbuf.len = 0;
lexbuf.ptr = tokstr = *s;
lexbuf.siz = l + 1;
err = dquote_parse('\0', 1);
if (tokstr)
*s = tokstr;
*lexbuf.ptr = '\0';
strinend();
inpop();
DPUTS(cmdsp, "BUG: parsestr: cmdstack not empty.");
zcontext_restore();
return err;
}
mod_export int
parse_subst_string(char *s)
{
int c, l = strlen(s), err, olen, lexstop_ret;
if (!*s || !strcmp(s, nulstring))
return 0;
lexsave();
untokenize(s);
inpush(dupstring(s), 0, NULL);
strinbeg(0);
len = 0;
bptr = tokstr = s;
bsiz = l + 1;
c = hgetc();
lexstop_ret = lexstop;
c = gettokstr(c, 1);
err = errflag;
strinend();
inpop();
DPUTS(cmdsp, "BUG: parse_subst_string: cmdstack not empty.");
olen = len;
lexrestore();
errflag = err;
if (c == LEXERR) {
untokenize(s);
return 1;
}
#ifdef DEBUG
if (c != STRING || olen != l || errflag) {
fprintf(stderr, "Oops. Bug in parse_subst_string: %s\n",
olen < l ? "len < l" : errflag ? "errflag" : "c != STRING");
fflush(stderr);
untokenize(s);
return 1;
}
#endif
return 0;
}
mod_export int
parse_subst_string(char *s)
{
int c, l = strlen(s), err;
char *ptr;
enum lextok ctok;
if (!*s || !strcmp(s, nulstring))
return 0;
zcontext_save();
untokenize(s);
inpush(dupstring(s), 0, NULL);
strinbeg(0);
lexbuf.len = 0;
lexbuf.ptr = tokstr = s;
lexbuf.siz = l + 1;
c = hgetc();
ctok = gettokstr(c, 1);
err = errflag;
strinend();
inpop();
DPUTS(cmdsp, "BUG: parse_subst_string: cmdstack not empty.");
zcontext_restore();
/* Keep any interrupt error status */
errflag = err | (errflag & ERRFLAG_INT);
if (ctok == LEXERR) {
untokenize(s);
return 1;
}
#ifdef DEBUG
/*
* Historical note: we used to check here for olen (the value of lexbuf.len
* before zcontext_restore()) == l, but that's not necessarily the case if
* we stripped an RCQUOTE.
*/
if (ctok != STRING || (errflag && !noerrs)) {
fprintf(stderr, "Oops. Bug in parse_subst_string: %s\n",
errflag ? "errflag" : "ctok != STRING");
fflush(stderr);
untokenize(s);
return 1;
}
#endif
/* Check for $'...' quoting. This needs special handling. */
for (ptr = s; *ptr; )
{
if (*ptr == String && ptr[1] == Snull)
{
char *t;
int len, tlen, diff;
t = getkeystring(ptr + 2, &len, GETKEYS_DOLLARS_QUOTE, NULL);
len += 2;
tlen = strlen(t);
diff = len - tlen;
/*
* Yuk.
* parse_subst_string() currently handles strings in-place.
* That's not so easy to fix without knowing whether
* additional memory should come off the heap or
* otherwise. So we cheat by copying the unquoted string
* into place, unless it's too long. That's not the
* normal case, but I'm worried there are pathological
* cases with converting metafied multibyte strings.
* If someone can prove there aren't I will be very happy.
*/
if (diff < 0) {
DPUTS(1, "$'...' subst too long: fix get_parse_string()");
return 1;
}
memcpy(ptr, t, tlen);
ptr += tlen;
if (diff > 0) {
char *dptr = ptr;
char *sptr = ptr + diff;
while ((*dptr++ = *sptr++))
;
}
} else
ptr++;
}
return 0;
}
