/*
* Pack up more characters in this word
*/
static int
Dpack(struct Strbuf *wbuf)
{
eChar c;
for (;;) {
c = DgetC(DODOL);
if (c == '\\') {
c = DgetC(0);
if (c == DEOF) {
unDredc(c);
return 1;
}
if (c == '\n')
c = ' ';
else
c |= QUOTE;
}
if (c == DEOF) {
unDredc(c);
return 1;
}
if (cmap(c, _SP | _NL | _QF | _QB)) { /* sp \t\n'"` */
unDgetC(c);
if (cmap(c, QUOTES))
return 0;
return 1;
}
Strbuf_append1(wbuf, (Char) c);
}
}
static void
fixDolMod(void)
{
int c;
c = DgetC(0);
if (c == ':') {
do {
c = DgetC(0), dolmcnt = 1, dolwcnt = 1;
if (c == 'g' || c == 'a') {
if (c == 'g')
dolmcnt = 10000;
else
dolwcnt = 10000;
c = DgetC(0);
}
if ((c == 'g' && dolmcnt != 10000) ||
(c == 'a' && dolwcnt != 10000)) {
if (c == 'g')
dolmcnt = 10000;
else
dolwcnt = 10000;
c = DgetC(0);
}
if (c == 's') { /* [eichin:19910926.0755EST] */
int delimcnt = 2;
int delim = DgetC(0);
dolmod[dolnmod++] = c;
dolmod[dolnmod++] = delim;
if (!delim || letter(delim)
|| Isdigit(delim) || any(" \t\n", delim)) {
seterror(ERR_BADSUBST);
break;
}
while ((c = DgetC(0)) != (-1)) {
dolmod[dolnmod++] = c;
if(c == delim) delimcnt--;
if(!delimcnt) break;
}
if(delimcnt) {
seterror(ERR_BADSUBST);
break;
}
continue;
}
if (!any("htrqxes", c))
stderror(ERR_BADMOD, c);
dolmod[dolnmod++] = c;
if (c == 'q')
dolmcnt = 10000;
}
while ((c = DgetC(0)) == ':');
unDredc(c);
}
else
unDredc(c);
}
static void
fixDolMod(void)
{
eChar c;
c = DgetC(0);
if (c == ':') {
do {
c = DgetC(0), dolmcnt = 1, dol_flag_a = 0;
if (c == 'g' || c == 'a') {
if (c == 'g')
dolmcnt = INT_MAX;
else
dol_flag_a = 1;
c = DgetC(0);
}
if ((c == 'g' && dolmcnt != INT_MAX) ||
(c == 'a' && dol_flag_a == 0)) {
if (c == 'g')
dolmcnt = INT_MAX;
else
dol_flag_a = 1;
c = DgetC(0);
}
if (c == 's') { /* [eichin:19910926.0755EST] */
int delimcnt = 2;
eChar delim = DgetC(0);
Strbuf_append1(&dolmod, (Char) c);
Strbuf_append1(&dolmod, (Char) delim);
if (delim == DEOF || !delim || letter(delim)
|| Isdigit(delim) || any(" \t\n", delim)) {
seterror(ERR_BADSUBST);
break;
}
while ((c = DgetC(0)) != DEOF) {
Strbuf_append1(&dolmod, (Char) c);
if(c == delim) delimcnt--;
if(!delimcnt) break;
}
if(delimcnt) {
seterror(ERR_BADSUBST);
break;
}
continue;
}
if (!any("luhtrqxes", c))
stderror(ERR_BADMOD, (int)c);
Strbuf_append1(&dolmod, (Char) c);
if (c == 'q')
dolmcnt = INT_MAX;
}
while ((c = DgetC(0)) == ':');
unDredc(c);
}
else
unDredc(c);
}
/*
* Pack up more characters in this word
*/
static Char *
Dpack(Char *wbuf, Char *wp)
{
int c;
int i = MAXWLEN - (wp - wbuf);
for (;;) {
c = DgetC(DODOL);
if (c == '\\') {
c = DgetC(0);
if (c == DEOF) {
unDredc(c);
*wp = 0;
Gcat(STRNULL, wbuf);
return (NULL);
}
if (c == '\n')
c = ' ';
else
c |= QUOTE;
}
if (c == DEOF) {
unDredc(c);
*wp = 0;
Gcat(STRNULL, wbuf);
return (NULL);
}
if (cmap(c, _SP | _NL | _QF | _QB)) { /* sp \t\n'"` */
unDgetC(c);
if (cmap(c, QUOTES))
return (wp);
*wp++ = 0;
Gcat(STRNULL, wbuf);
return (NULL);
}
if (--i <= 0)
stderror(ERR_WTOOLONG);
*wp++ = c;
}
}
/*
* Subroutine to do actual fixing after state initialization.
*/
static void
Dfix2(Char **v)
{
ginit(); /* Initialize glob's area pointers */
Dvp = v;
Dcp = STRNULL; /* Setup input vector for Dreadc */
unDgetC(0);
unDredc(0); /* Clear out any old peeks (at error) */
dolp = 0;
dolcnt = 0; /* Clear out residual $ expands (...) */
while (Dword())
continue;
}
/*
* Subroutine to do actual fixing after state initialization.
*/
void
Dfix2(tchar **v)
{
tchar *agargv[GAVSIZ];
#ifdef TRACE
tprintf("TRACE- Dfix2()\n");
#endif
ginit(agargv); /* Initialize glob's area pointers */
Dvp = v; Dcp = S_ /* "" */; /* Setup input vector for Dreadc */
unDgetC(0); unDredc(0); /* Clear out any old peeks (at error) */
dolp = 0; dolcnt = 0; /* Clear out residual $ expands (...) */
while (Dword())
continue;
gargv = copyblk(gargv);
}
/*
* Handle the multitudinous $ expansion forms.
* Ugh.
*/
static void
Dgetdol(void)
{
Char *np;
struct varent *vp = NULL;
Char name[4 * MAXVARLEN + 1];
int c, sc;
int subscr = 0, lwb = 1, upb = 0;
bool dimen = 0, bitset = 0;
char tnp;
Char wbuf[BUFSIZ];
static Char *dolbang = NULL;
dolnmod = dolmcnt = dolwcnt = 0;
c = sc = DgetC(0);
if (c == '{')
c = DgetC(0); /* sc is { to take } later */
if ((c & TRIM) == '#')
dimen++, c = DgetC(0); /* $# takes dimension */
else if (c == '?')
bitset++, c = DgetC(0); /* $? tests existence */
switch (c) {
case '!':
if (dimen || bitset)
stderror(ERR_SYNTAX);
if (backpid != 0) {
if (dolbang)
xfree(dolbang);
setDolp(dolbang = putn(backpid));
}
goto eatbrac;
case '$':
if (dimen || bitset)
stderror(ERR_SYNTAX);
setDolp(doldol);
goto eatbrac;
case '<' | QUOTE:
if (bitset)
stderror(ERR_NOTALLOWED, "$?<");
if (dimen)
stderror(ERR_NOTALLOWED, "$?#");
for (np = wbuf; read(OLDSTD, &tnp, 1) == 1; np++) {
*np = (unsigned char) tnp;
if (np >= &wbuf[BUFSIZ - 1])
stderror(ERR_LTOOLONG);
if (tnp == '\n')
break;
}
*np = 0;
/*
* KLUDGE: dolmod is set here because it will cause setDolp to call
* domod and thus to copy wbuf. Otherwise setDolp would use it
* directly. If we saved it ourselves, no one would know when to free
* it. The actual function of the 'q' causes filename expansion not to
* be done on the interpolated value.
*/
dolmod[dolnmod++] = 'q';
dolmcnt = 10000;
setDolp(wbuf);
goto eatbrac;
case DEOF:
case '\n':
stderror(ERR_SYNTAX);
/* NOTREACHED */
break;
case '*':
(void) Strlcpy(name, STRargv, sizeof name/sizeof(Char));
vp = adrof(STRargv);
subscr = -1; /* Prevent eating [...] */
break;
default:
np = name;
if (Isdigit(c)) {
if (dimen)
stderror(ERR_NOTALLOWED, "$#<num>");
subscr = 0;
do {
subscr = subscr * 10 + c - '0';
c = DgetC(0);
} while (Isdigit(c));
unDredc(c);
if (subscr < 0)
stderror(ERR_RANGE);
if (subscr == 0) {
if (bitset) {
dolp = ffile ? STR1 : STR0;
goto eatbrac;
}
if (ffile == 0)
stderror(ERR_DOLZERO);
fixDolMod();
setDolp(ffile);
goto eatbrac;
}
if (bitset)
stderror(ERR_DOLQUEST);
vp = adrof(STRargv);
if (vp == 0) {
vp = &nulargv;
goto eatmod;
}
break;
}
if (!alnum(c))
stderror(ERR_VARALNUM);
for (;;) {
*np++ = c;
c = DgetC(0);
if (!alnum(c))
break;
if (np >= &name[MAXVARLEN])
stderror(ERR_VARTOOLONG);
}
*np++ = 0;
unDredc(c);
vp = adrof(name);
}
if (bitset) {
dolp = (vp || getenv(short2str(name))) ? STR1 : STR0;
goto eatbrac;
}
if (vp == 0) {
np = str2short(getenv(short2str(name)));
if (np) {
fixDolMod();
setDolp(np);
goto eatbrac;
}
udvar(name);
/* NOTREACHED */
}
c = DgetC(0);
upb = blklen(vp->vec);
if (dimen == 0 && subscr == 0 && c == '[') {
np = name;
for (;;) {
c = DgetC(DODOL); /* Allow $ expand within [ ] */
if (c == ']')
break;
if (c == '\n' || c == DEOF)
stderror(ERR_INCBR);
if (np >= &name[sizeof(name) / sizeof(Char) - 2])
stderror(ERR_VARTOOLONG);
*np++ = c;
}
*np = 0, np = name;
if (dolp || dolcnt) /* $ exp must end before ] */
stderror(ERR_EXPORD);
if (!*np)
stderror(ERR_SYNTAX);
if (Isdigit(*np)) {
int i;
for (i = 0; Isdigit(*np); i = i * 10 + *np++ - '0')
continue;
if ((i < 0 || i > upb) && !any("-*", *np)) {
dolerror(vp->v_name);
return;
}
lwb = i;
if (!*np)
upb = lwb, np = STRstar;
}
if (*np == '*')
np++;
else if (*np != '-')
stderror(ERR_MISSING, '-');
else {
int i = upb;
np++;
if (Isdigit(*np)) {
i = 0;
while (Isdigit(*np))
i = i * 10 + *np++ - '0';
if (i < 0 || i > upb) {
dolerror(vp->v_name);
return;
}
}
if (i < lwb)
upb = lwb - 1;
else
upb = i;
}
if (lwb == 0) {
if (upb != 0) {
dolerror(vp->v_name);
return;
}
upb = -1;
}
if (*np)
stderror(ERR_SYNTAX);
}
else {
if (subscr > 0) {
if (subscr > upb)
lwb = 1, upb = 0;
else
lwb = upb = subscr;
}
unDredc(c);
}
if (dimen) {
Char *cp = putn(upb - lwb + 1);
addla(cp);
xfree(cp);
}
else {
eatmod:
fixDolMod();
dolnxt = &vp->vec[lwb - 1];
dolcnt = upb - lwb + 1;
}
eatbrac:
if (sc == '{') {
c = Dredc();
if (c != '}')
stderror(ERR_MISSING, '}');
}
}
/*
* Get a word. This routine is analogous to the routine
* word() in sh.lex.c for the main lexical input. One difference
* here is that we don't get a newline to terminate our expansion.
* Rather, DgetC will return a DEOF when we hit the end-of-input.
*/
static int
Dword(void)
{
int c, c1;
Char wbuf[BUFSIZ];
Char *wp = wbuf;
int i = MAXWLEN;
bool dolflg;
bool sofar = 0, done = 0;
while (!done) {
done = 1;
c = DgetC(DODOL);
switch (c) {
case DEOF:
if (sofar == 0)
return (0);
/* finish this word and catch the code above the next time */
unDredc(c);
/* fall into ... */
case '\n':
*wp = 0;
Gcat(STRNULL, wbuf);
return (1);
case ' ':
case '\t':
done = 0;
break;
case '`':
/* We preserve ` quotations which are done yet later */
*wp++ = c, --i;
case '\'':
case '"':
/*
* Note that DgetC never returns a QUOTES character from an
* expansion, so only true input quotes will get us here or out.
*/
c1 = c;
dolflg = c1 == '"' ? DODOL : 0;
for (;;) {
c = DgetC(dolflg);
if (c == c1)
break;
if (c == '\n' || c == DEOF)
stderror(ERR_UNMATCHED, c1);
if ((c & (QUOTE | TRIM)) == ('\n' | QUOTE))
--wp, ++i;
if (--i <= 0)
stderror(ERR_WTOOLONG);
switch (c1) {
case '"':
/*
* Leave any `s alone for later. Other chars are all
* quoted, thus `...` can tell it was within "...".
*/
*wp++ = c == '`' ? '`' : c | QUOTE;
break;
case '\'':
/* Prevent all further interpretation */
*wp++ = c | QUOTE;
break;
case '`':
/* Leave all text alone for later */
*wp++ = c;
break;
default:
break;
}
}
if (c1 == '`')
*wp++ = '`' /* i--; eliminated */;
sofar = 1;
if ((wp = Dpack(wbuf, wp)) == NULL)
return (1);
else {
i = MAXWLEN - (wp - wbuf);
done = 0;
}
break;
case '\\':
c = DgetC(0); /* No $ subst! */
if (c == '\n' || c == DEOF) {
done = 0;
break;
}
c |= QUOTE;
break;
default:
break;
}
if (done) {
unDgetC(c);
sofar = 1;
if ((wp = Dpack(wbuf, wp)) == NULL)
return (1);
else {
i = MAXWLEN - (wp - wbuf);
done = 0;
}
}
}
/* Really NOTREACHED */
return (0);
}
/*
* Handle the multitudinous $ expansion forms.
* Ugh.
*/
static void
Dgetdol(void)
{
Char *np;
struct varent *vp = NULL;
struct Strbuf *name = Strbuf_alloc();
eChar c, sc;
int subscr = 0, lwb = 1, upb = 0;
int dimen = 0, bitset = 0, length = 0;
static Char *dolbang = NULL;
cleanup_push(name, Strbuf_free);
dolmod.len = dolmcnt = dol_flag_a = 0;
c = sc = DgetC(0);
if (c == DEOF) {
stderror(ERR_SYNTAX);
return;
}
if (c == '{')
c = DgetC(0); /* sc is { to take } later */
if ((c & TRIM) == '#')
dimen++, c = DgetC(0); /* $# takes dimension */
else if (c == '?')
bitset++, c = DgetC(0); /* $? tests existence */
else if (c == '%')
length++, c = DgetC(0); /* $% returns length in chars */
switch (c) {
case '!':
if (dimen || bitset || length)
stderror(ERR_SYNTAX);
if (backpid != 0) {
xfree(dolbang);
setDolp(dolbang = putn((tcsh_number_t)backpid));
}
cleanup_until(name);
goto eatbrac;
case '$':
if (dimen || bitset || length)
stderror(ERR_SYNTAX);
setDolp(doldol);
cleanup_until(name);
goto eatbrac;
case '<'|QUOTE: {
static struct Strbuf wbuf; /* = Strbuf_INIT; */
if (bitset)
stderror(ERR_NOTALLOWED, "$?<");
if (dimen)
stderror(ERR_NOTALLOWED, "$#<");
if (length)
stderror(ERR_NOTALLOWED, "$%<");
wbuf.len = 0;
{
char cbuf[MB_LEN_MAX];
size_t cbp = 0;
int old_pintr_disabled;
for (;;) {
int len;
ssize_t res;
Char wc;
pintr_push_enable(&old_pintr_disabled);
res = force_read(OLDSTD, cbuf + cbp, 1);
cleanup_until(&old_pintr_disabled);
if (res != 1)
break;
cbp++;
len = normal_mbtowc(&wc, cbuf, cbp);
if (len == -1) {
reset_mbtowc();
if (cbp < MB_LEN_MAX)
continue; /* Maybe a partial character */
wc = (unsigned char)*cbuf | INVALID_BYTE;
}
if (len <= 0)
len = 1;
if (cbp != (size_t)len)
memmove(cbuf, cbuf + len, cbp - len);
cbp -= len;
if (wc == '\n')
break;
Strbuf_append1(&wbuf, wc);
}
while (cbp != 0) {
int len;
Char wc;
len = normal_mbtowc(&wc, cbuf, cbp);
if (len == -1) {
reset_mbtowc();
wc = (unsigned char)*cbuf | INVALID_BYTE;
}
if (len <= 0)
len = 1;
if (cbp != (size_t)len)
memmove(cbuf, cbuf + len, cbp - len);
cbp -= len;
if (wc == '\n')
break;
Strbuf_append1(&wbuf, wc);
}
Strbuf_terminate(&wbuf);
}
fixDolMod();
setDolp(wbuf.s); /* Kept allocated until next $< expansion */
cleanup_until(name);
goto eatbrac;
}
case '*':
Strbuf_append(name, STRargv);
Strbuf_terminate(name);
vp = adrof(STRargv);
subscr = -1; /* Prevent eating [...] */
break;
case DEOF:
case '\n':
np = dimen ? STRargv : (bitset ? STRstatus : NULL);
if (np) {
bitset = 0;
Strbuf_append(name, np);
Strbuf_terminate(name);
vp = adrof(np);
subscr = -1; /* Prevent eating [...] */
unDredc(c);
break;
}
else
stderror(ERR_SYNTAX);
/*NOTREACHED*/
default:
if (Isdigit(c)) {
if (dimen)
stderror(ERR_NOTALLOWED, "$#<num>");
subscr = 0;
do {
subscr = subscr * 10 + c - '0';
c = DgetC(0);
} while (c != DEOF && Isdigit(c));
unDredc(c);
if (subscr < 0)
stderror(ERR_RANGE);
if (subscr == 0) {
if (bitset) {
dolp = dolzero ? STR1 : STR0;
cleanup_until(name);
goto eatbrac;
}
if (ffile == 0)
stderror(ERR_DOLZERO);
if (length) {
length = Strlen(ffile);
addla(putn((tcsh_number_t)length));
}
else {
fixDolMod();
setDolp(ffile);
}
cleanup_until(name);
goto eatbrac;
}
#if 0
if (bitset)
stderror(ERR_NOTALLOWED, "$?<num>");
if (length)
stderror(ERR_NOTALLOWED, "$%<num>");
#endif
vp = adrof(STRargv);
if (vp == 0) {
vp = &nulargv;
cleanup_until(name);
goto eatmod;
}
break;
}
if (c == DEOF || !alnum(c)) {
np = dimen ? STRargv : (bitset ? STRstatus : NULL);
if (np) {
bitset = 0;
Strbuf_append(name, np);
Strbuf_terminate(name);
vp = adrof(np);
subscr = -1; /* Prevent eating [...] */
unDredc(c);
break;
}
else
stderror(ERR_VARALNUM);
}
for (;;) {
Strbuf_append1(name, (Char) c);
c = DgetC(0);
if (c == DEOF || !alnum(c))
break;
}
Strbuf_terminate(name);
unDredc(c);
vp = adrof(name->s);
}
if (bitset) {
dolp = (vp || getenv(short2str(name->s))) ? STR1 : STR0;
cleanup_until(name);
goto eatbrac;
}
if (vp == NULL || vp->vec == NULL) {
np = str2short(getenv(short2str(name->s)));
if (np) {
static Char *env_val; /* = NULL; */
cleanup_until(name);
fixDolMod();
if (length) {
addla(putn((tcsh_number_t)Strlen(np)));
} else {
xfree(env_val);
env_val = Strsave(np);
setDolp(env_val);
}
goto eatbrac;
}
udvar(name->s);
/* NOTREACHED */
}
cleanup_until(name);
c = DgetC(0);
upb = blklen(vp->vec);
if (dimen == 0 && subscr == 0 && c == '[') {
name = Strbuf_alloc();
cleanup_push(name, Strbuf_free);
np = name->s;
for (;;) {
c = DgetC(DODOL); /* Allow $ expand within [ ] */
if (c == ']')
break;
if (c == '\n' || c == DEOF)
stderror(ERR_INCBR);
Strbuf_append1(name, (Char) c);
}
Strbuf_terminate(name);
np = name->s;
if (dolp || dolcnt) /* $ exp must end before ] */
stderror(ERR_EXPORD);
if (!*np)
stderror(ERR_SYNTAX);
if (Isdigit(*np)) {
int i;
for (i = 0; Isdigit(*np); i = i * 10 + *np++ - '0')
continue;
if (i < 0 || (i > upb && !any("-*", *np))) {
cleanup_until(name);
dolerror(vp->v_name);
return;
}
lwb = i;
if (!*np)
upb = lwb, np = STRstar;
}
if (*np == '*')
np++;
else if (*np != '-')
stderror(ERR_MISSING, '-');
else {
int i = upb;
np++;
if (Isdigit(*np)) {
i = 0;
while (Isdigit(*np))
i = i * 10 + *np++ - '0';
if (i < 0 || i > upb) {
cleanup_until(name);
dolerror(vp->v_name);
return;
}
}
if (i < lwb)
upb = lwb - 1;
else
upb = i;
}
if (lwb == 0) {
if (upb != 0) {
cleanup_until(name);
dolerror(vp->v_name);
return;
}
upb = -1;
}
if (*np)
stderror(ERR_SYNTAX);
cleanup_until(name);
}
else {
if (subscr > 0) {
if (subscr > upb)
lwb = 1, upb = 0;
else
lwb = upb = subscr;
}
unDredc(c);
}
if (dimen) {
/* this is a kludge. It prevents Dgetdol() from */
/* pushing erroneous ${#<error> values into the labuf. */
if (sc == '{') {
c = Dredc();
if (c != '}')
stderror(ERR_MISSING, '}');
unDredc(c);
}
addla(putn((tcsh_number_t)(upb - lwb + 1)));
}
else if (length) {
int i;
for (i = lwb - 1, length = 0; i < upb; i++)
length += Strlen(vp->vec[i]);
#ifdef notdef
/* We don't want that, since we can always compute it by adding $#xxx */
length += i - 1; /* Add the number of spaces in */
#endif
addla(putn((tcsh_number_t)length));
}
else {
eatmod:
fixDolMod();
dolnxt = &vp->vec[lwb - 1];
dolcnt = upb - lwb + 1;
}
eatbrac:
if (sc == '{') {
c = Dredc();
if (c != '}')
stderror(ERR_MISSING, '}');
}
}
/*
* Get a word. This routine is analogous to the routine
* word() in sh.lex.c for the main lexical input. One difference
* here is that we don't get a newline to terminate our expansion.
* Rather, DgetC will return a DEOF when we hit the end-of-input.
*/
static int
Dword(struct blk_buf *bb)
{
eChar c, c1;
struct Strbuf *wbuf = Strbuf_alloc();
int dolflg;
int sofar = 0;
Char *str;
cleanup_push(wbuf, Strbuf_free);
for (;;) {
c = DgetC(DODOL);
switch (c) {
case DEOF:
if (sofar == 0) {
cleanup_until(wbuf);
return (0);
}
/* finish this word and catch the code above the next time */
unDredc(c);
/*FALLTHROUGH*/
case '\n':
goto end;
case ' ':
case '\t':
continue;
case '`':
/* We preserve ` quotations which are done yet later */
Strbuf_append1(wbuf, (Char) c);
/*FALLTHROUGH*/
case '\'':
case '"':
/*
* Note that DgetC never returns a QUOTES character from an
* expansion, so only true input quotes will get us here or out.
*/
c1 = c;
dolflg = c1 == '"' ? DODOL : 0;
for (;;) {
c = DgetC(dolflg);
if (c == c1)
break;
if (c == '\n' || c == DEOF) {
cleanup_until(bb);
stderror(ERR_UNMATCHED, (int)c1);
}
if ((c & (QUOTE | TRIM)) == ('\n' | QUOTE)) {
if (wbuf->len != 0 && (wbuf->s[wbuf->len - 1] & TRIM) == '\\')
wbuf->len--;
}
switch (c1) {
case '"':
/*
* Leave any `s alone for later. Other chars are all
* quoted, thus `...` can tell it was within "...".
*/
Strbuf_append1(wbuf, c == '`' ? '`' : c | QUOTE);
break;
case '\'':
/* Prevent all further interpretation */
Strbuf_append1(wbuf, c | QUOTE);
break;
case '`':
/* Leave all text alone for later */
Strbuf_append1(wbuf, (Char) c);
break;
default:
break;
}
}
if (c1 == '`')
Strbuf_append1(wbuf, '`');
sofar = 1;
if (Dpack(wbuf) != 0)
goto end;
continue;
case '\\':
c = DgetC(0); /* No $ subst! */
if (c == '\n' || c == DEOF)
continue;
c |= QUOTE;
break;
default:
break;
}
unDgetC(c);
sofar = 1;
if (Dpack(wbuf) != 0)
goto end;
}
end:
cleanup_ignore(wbuf);
cleanup_until(wbuf);
str = Strbuf_finish(wbuf);
bb_append(bb, str);
xfree(wbuf);
return 1;
}
/*
* Handle the multitudinous $ expansion forms.
* Ugh.
*/
void
Dgetdol(void)
{
tchar *np;
struct varent *vp;
tchar name[MAX_VREF_LEN];
int c, sc;
int subscr = 0, lwb = 1, upb = 0;
bool dimen = 0, bitset = 0;
tchar wbuf[BUFSIZ + MB_LEN_MAX]; /* read_ may return extra bytes */
#ifdef TRACE
tprintf("TRACE- Dgetdol()\n");
#endif
dolmod = dolmcnt = 0;
c = sc = DgetC(0);
if (c == '{')
c = DgetC(0); /* sc is { to take } later */
if ((c & TRIM) == '#')
dimen++, c = DgetC(0); /* $# takes dimension */
else if (c == '?')
bitset++, c = DgetC(0); /* $? tests existence */
switch (c) {
case '$':
if (dimen || bitset)
syntax:
error("Variable syntax"); /* No $?$, $#$ */
setDolp(doldol);
goto eatbrac;
case '<'|QUOTE:
if (dimen || bitset)
goto syntax; /* No $?<, $#< */
for (np = wbuf; read_(OLDSTD, np, 1) == 1; np++) {
if (np >= &wbuf[BUFSIZ-1])
error("$< line too long");
if (*np <= 0 || *np == '\n')
break;
}
*np = 0;
/*
* KLUDGE: dolmod is set here because it will
* cause setDolp to call domod and thus to copy wbuf.
* Otherwise setDolp would use it directly. If we saved
* it ourselves, no one would know when to free it.
* The actual function of the 'q' causes filename
* expansion not to be done on the interpolated value.
*/
dolmod = 'q';
dolmcnt = 10000;
setDolp(wbuf);
goto eatbrac;
case DEOF:
case '\n':
goto syntax;
case '*':
(void) strcpy_(name, S_argv);
vp = adrof(S_argv);
subscr = -1; /* Prevent eating [...] */
break;
default:
np = name;
if (digit(c)) {
if (dimen)
goto syntax; /* No $#1, e.g. */
subscr = 0;
do {
subscr = subscr * 10 + c - '0';
c = DgetC(0);
} while (digit(c));
unDredc(c);
if (subscr < 0)
error("Subscript out of range");
if (subscr == 0) {
if (bitset) {
dolp = file ? S_1 /* "1" */ : S_0 /* "0" */;
goto eatbrac;
}
if (file == 0)
error("No file for $0");
setDolp(file);
goto eatbrac;
}
if (bitset)
goto syntax;
vp = adrof(S_argv);
if (vp == 0) {
vp = &nulargv;
goto eatmod;
}
break;
}
if (!alnum(c))
goto syntax;
for (;;) {
*np++ = c;
c = DgetC(0);
if (!alnum(c))
break;
/* if variable name is > 20, complain */
if (np >= &name[MAX_VAR_LEN])
error("Variable name too long");
}
*np++ = 0;
unDredc(c);
vp = adrof(name);
}
if (bitset) {
/*
* getenv() to getenv_(), because 'name''s type is now tchar *
* no need to xalloc
*/
dolp = (vp || getenv_(name)) ? S_1 /* "1" */ : S_0 /* "0" */;
goto eatbrac;
}
if (vp == 0) {
/*
* getenv() to getenv_(), because 'name''s type is now tchar *
* no need to xalloc
*/
np = getenv_(name);
if (np) {
addla(np);
goto eatbrac;
}
udvar(name);
/*NOTREACHED*/
}
c = DgetC(0);
upb = blklen(vp->vec);
if (dimen == 0 && subscr == 0 && c == '[') {
np = name;
for (;;) {
c = DgetC(DODOL); /* Allow $ expand within [ ] */
if (c == ']')
break;
if (c == '\n' || c == DEOF)
goto syntax;
if (np >= &name[MAX_VREF_LEN])
error("Variable reference too long");
*np++ = c;
}
*np = 0, np = name;
if (dolp || dolcnt) /* $ exp must end before ] */
goto syntax;
if (!*np)
goto syntax;
if (digit(*np)) {
int i = 0;
while (digit(*np))
i = i * 10 + *np++ - '0';
/* if ((i < 0 || i > upb) && !any(*np, "-*")) { */
if ((i < 0 || i > upb) && (*np != '-') && (*np != '*')) {
oob:
setname(vp->v_name);
error("Subscript out of range");
}
lwb = i;
if (!*np)
upb = lwb, np = S_AST /* "*" */;
}
if (*np == '*')
np++;
else if (*np != '-')
goto syntax;
else {
int i = upb;
np++;
if (digit(*np)) {
i = 0;
while (digit(*np))
i = i * 10 + *np++ - '0';
if (i < 0 || i > upb)
goto oob;
}
if (i < lwb)
upb = lwb - 1;
else
upb = i;
}
if (lwb == 0) {
if (upb != 0)
goto oob;
upb = -1;
}
if (*np)
goto syntax;
} else {
if (subscr > 0)
if (subscr > upb)
lwb = 1, upb = 0;
else
lwb = upb = subscr;
unDredc(c);
}
if (dimen) {
tchar *cp = putn(upb - lwb + 1);
addla(cp);
xfree(cp);
} else {
eatmod:
c = DgetC(0);
if (c == ':') {
c = DgetC(0), dolmcnt = 1;
if (c == 'g')
c = DgetC(0), dolmcnt = 10000;
if (!any(c, S_htrqxe))
error("Bad : mod in $");
dolmod = c;
if (c == 'q')
dolmcnt = 10000;
} else
unDredc(c);
dolnxt = &vp->vec[lwb - 1];
dolcnt = upb - lwb + 1;
}
eatbrac:
if (sc == '{') {
c = Dredc();
if (c != '}')
goto syntax;
}
}
/*
* Get a word. This routine is analogous to the routine
* word() in sh.lex.c for the main lexical input. One difference
* here is that we don't get a newline to terminate our expansion.
* Rather, DgetC will return a DEOF when we hit the end-of-input.
*/
int
Dword(void)
{
int c, c1;
static tchar *wbuf = NULL;
static int wbufsiz = BUFSIZ;
int wp = 0;
bool dolflg;
bool sofar = 0;
#define DYNAMICBUFFER() \
do { \
if (wp >= wbufsiz) { \
wbufsiz += BUFSIZ; \
wbuf = xrealloc(wbuf, (wbufsiz+1) * sizeof (tchar)); \
} \
} while (0)
#ifdef TRACE
tprintf("TRACE- Dword()\n");
#endif
if (wbuf == NULL)
wbuf = xalloc((wbufsiz+1) * sizeof (tchar));
loop:
c = DgetC(DODOL);
switch (c) {
case DEOF:
deof:
if (sofar == 0)
return (0);
/* finish this word and catch the code above the next time */
unDredc(c);
/* fall into ... */
case '\n':
wbuf[wp] = 0;
goto ret;
case ' ':
case '\t':
goto loop;
case '`':
/* We preserve ` quotations which are done yet later */
wbuf[wp++] = c;
case '\'':
case '"':
/*
* Note that DgetC never returns a QUOTES character
* from an expansion, so only true input quotes will
* get us here or out.
*/
c1 = c;
dolflg = c1 == '"' ? DODOL : 0;
for (;;) {
c = DgetC(dolflg);
if (c == c1)
break;
if (c == '\n' || c == DEOF)
error("Unmatched %c", (tchar) c1);
if ((c & (QUOTE|TRIM)) == ('\n' | QUOTE))
--wp;
DYNAMICBUFFER();
switch (c1) {
case '"':
/*
* Leave any `s alone for later.
* Other chars are all quoted, thus `...`
* can tell it was within "...".
*/
wbuf[wp++] = c == '`' ? '`' : c | QUOTE;
break;
case '\'':
/* Prevent all further interpretation */
wbuf[wp++] = c | QUOTE;
break;
case '`':
/* Leave all text alone for later */
wbuf[wp++] = c;
break;
}
}
if (c1 == '`') {
DYNAMICBUFFER();
wbuf[wp++] = '`';
}
goto pack; /* continue the word */
case '\\':
c = DgetC(0); /* No $ subst! */
if (c == '\n' || c == DEOF)
goto loop;
c |= QUOTE;
break;
#ifdef MBCHAR /* Could be a space char from aux. codeset. */
default:
if (isauxsp(c)) goto loop;
#endif /* MBCHAR */
}
unDgetC(c);
pack:
sofar = 1;
/* pack up more characters in this word */
for (;;) {
c = DgetC(DODOL);
if (c == '\\') {
c = DgetC(0);
if (c == DEOF)
goto deof;
if (c == '\n')
c = ' ';
else
c |= QUOTE;
}
if (c == DEOF)
goto deof;
if (cmap(c, _SP|_NL|_Q|_Q1) ||
isauxsp(c)) { /* sp \t\n'"` or aux. sp */
unDgetC(c);
if (cmap(c, QUOTES))
goto loop;
DYNAMICBUFFER();
wbuf[wp++] = 0;
goto ret;
}
DYNAMICBUFFER();
wbuf[wp++] = c;
}
ret:
Gcat(S_ /* "" */, wbuf);
return (1);
}
