static int
expvar (struct wordsplit *wsp, const char *str, size_t len,
struct wordsplit_node **ptail, const char **pend, int flg)
{
size_t i = 0;
const char *defstr = NULL;
const char *value;
const char *vptr;
struct wordsplit_node *newnode;
const char *start = str - 1;
if (ISALPHA (str[0]) || str[0] == '_')
{
for (i = 1; i < len; i++)
if (!(ISALNUM (str[i]) || str[i] == '_'))
break;
*pend = str + i - 1;
}
else if (str[0] == '{')
{
str++;
len--;
for (i = 1; i < len; i++)
if (str[i] == '}' || str[i] == ':')
break;
if (str[i] == ':')
{
size_t j;
defstr = str + i + 1;
if (find_closing_cbrace (str, i + 1, len, &j))
{
wsp->ws_errno = WRDSE_CBRACE;
return 1;
}
*pend = str + j;
}
else if (str[i] == '}')
{
defstr = NULL;
*pend = str + i;
}
else
{
wsp->ws_errno = WRDSE_CBRACE;
return 1;
}
}
else
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD | flg;
newnode->v.word = malloc (3);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
newnode->v.word[0] = '$';
newnode->v.word[1] = str[0];
newnode->v.word[2] = 0;
*pend = str;
return 0;
}
/* Actually expand the variable */
/* str - start of the variable name
i - its length
defstr - default replacement str */
vptr = wordsplit_find_env (wsp, str, i);
if (vptr)
{
value = strdup (vptr);
if (!value)
return _wsplt_nomem (wsp);
}
else if (wsp->ws_flags & WRDSF_GETVAR)
value = wsp->ws_getvar (str, i, wsp->ws_closure);
else if (wsp->ws_flags & WRDSF_UNDEF)
{
wsp->ws_errno = WRDSE_UNDEF;
if (wsp->ws_flags & WRDSF_SHOWERR)
wordsplit_perror (wsp);
return 1;
}
else
{
if (wsp->ws_flags & WRDSF_KEEPUNDEF)
value = NULL;
else
value = "";
}
/* FIXME: handle defstr */
(void) defstr;
if (value)
{
if (flg & _WSNF_QUOTE)
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD | _WSNF_NOEXPAND | flg;
newnode->v.word = strdup (value);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
}
else if (*value == 0)
{
/* Empty string is a special case */
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_NULL;
}
else
{
struct wordsplit ws;
int i;
ws.ws_delim = wsp->ws_delim;
if (wordsplit (value, &ws,
WRDSF_NOVAR | WRDSF_NOCMD | WRDSF_DELIM | WRDSF_WS))
{
wordsplit_free (&ws);
return 1;
}
for (i = 0; i < ws.ws_wordc; i++)
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD |
_WSNF_NOEXPAND |
(i + 1 < ws.ws_wordc ? (flg & ~_WSNF_JOIN) : flg);
newnode->v.word = strdup (ws.ws_wordv[i]);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
}
wordsplit_free (&ws);
}
}
else if (wsp->ws_flags & WRDSF_KEEPUNDEF)
{
size_t size = *pend - start + 1;
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD | _WSNF_NOEXPAND | flg;
newnode->v.word = malloc (size + 1);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
memcpy (newnode->v.word, start, size);
newnode->v.word[size] = 0;
}
else
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_NULL;
}
return 0;
}
static int
expvar (struct wordsplit *wsp, const char *str, size_t len,
struct wordsplit_node **ptail, const char **pend, int flg)
{
size_t i = 0;
const char *defstr = NULL;
char *value;
const char *vptr;
struct wordsplit_node *newnode;
const char *start = str - 1;
int rc;
struct wordsplit ws;
if (ISVARBEG (str[0]))
{
for (i = 1; i < len; i++)
if (!ISVARCHR (str[i]))
break;
*pend = str + i - 1;
}
else if (str[0] == '{')
{
str++;
len--;
for (i = 1; i < len; i++)
{
if (str[i] == ':')
{
size_t j;
defstr = str + i + 1;
if (find_closing_paren (str, i + 1, len, &j, "{}"))
return _wsplt_seterr (wsp, WRDSE_CBRACE);
*pend = str + j;
break;
}
else if (str[i] == '}')
{
defstr = NULL;
*pend = str + i;
break;
}
else if (strchr ("-+?=", str[i]))
{
size_t j;
defstr = str + i;
if (find_closing_paren (str, i, len, &j, "{}"))
return _wsplt_seterr (wsp, WRDSE_CBRACE);
*pend = str + j;
break;
}
}
if (i == len)
return _wsplt_seterr (wsp, WRDSE_CBRACE);
}
else
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD | flg;
newnode->v.word = malloc (3);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
newnode->v.word[0] = '$';
newnode->v.word[1] = str[0];
newnode->v.word[2] = 0;
*pend = str;
return 0;
}
/* Actually expand the variable */
/* str - start of the variable name
i - its length
defstr - default replacement str */
if (defstr && strchr("-+?=", defstr[0]) == 0)
{
rc = WRDSE_UNDEF;
defstr = NULL;
}
else
{
rc = wordsplit_find_env (wsp, str, i, &vptr);
if (rc == WRDSE_OK)
{
value = strdup (vptr);
if (!value)
rc = WRDSE_NOSPACE;
}
else if (wsp->ws_flags & WRDSF_GETVAR)
rc = wsp->ws_getvar (&value, str, i, wsp->ws_closure);
else
rc = WRDSE_UNDEF;
if (rc == WRDSE_OK && value[0] == 0 && defstr && defstr[-1] == ':')
{
free (value);
rc = WRDSE_UNDEF;
}
}
switch (rc)
{
case WRDSE_OK:
if (defstr && *defstr == '+')
{
size_t size = *pend - ++defstr;
rc = _wsplt_subsplit (wsp, &ws, defstr, size,
WRDSF_NOSPLIT | WRDSF_WS | WRDSF_QUOTE |
(wsp->ws_flags &
(WRDSF_NOVAR | WRDSF_NOCMD)));
if (rc)
return rc;
free (value);
value = ws.ws_wordv[0];
ws.ws_wordv[0] = NULL;
wordsplit_free (&ws);
}
break;
case WRDSE_UNDEF:
if (defstr)
{
size_t size;
if (*defstr == '-' || *defstr == '=')
{
size = *pend - ++defstr;
rc = _wsplt_subsplit (wsp, &ws, defstr, size,
WRDSF_NOSPLIT | WRDSF_WS | WRDSF_QUOTE |
(wsp->ws_flags &
(WRDSF_NOVAR | WRDSF_NOCMD)));
if (rc)
return rc;
value = ws.ws_wordv[0];
ws.ws_wordv[0] = NULL;
wordsplit_free (&ws);
if (defstr[-1] == '=')
wsplt_assign_var (wsp, str, i, value);
}
else
{
if (*defstr == '?')
{
size = *pend - ++defstr;
if (size == 0)
wsp->ws_error (_("%.*s: variable null or not set"),
(int) i, str);
else
{
rc = _wsplt_subsplit (wsp, &ws, defstr, size,
WRDSF_NOSPLIT | WRDSF_WS |
WRDSF_QUOTE |
(wsp->ws_flags &
(WRDSF_NOVAR | WRDSF_NOCMD)));
if (rc == 0)
wsp->ws_error ("%.*s: %s",
(int) i, str, ws.ws_wordv[0]);
else
wsp->ws_error ("%.*s: %.*s",
(int) i, str, (int) size, defstr);
wordsplit_free (&ws);
}
}
value = NULL;
}
}
else if (wsp->ws_flags & WRDSF_UNDEF)
{
_wsplt_seterr (wsp, WRDSE_UNDEF);
return 1;
}
else
{
if (wsp->ws_flags & WRDSF_WARNUNDEF)
wsp->ws_error (_("warning: undefined variable `%.*s'"),
(int) i, str);
if (wsp->ws_flags & WRDSF_KEEPUNDEF)
value = NULL;
else
{
value = strdup ("");
if (!value)
return _wsplt_nomem (wsp);
}
}
break;
case WRDSE_NOSPACE:
return _wsplt_nomem (wsp);
case WRDSE_USERERR:
if (wsp->ws_errno == WRDSE_USERERR)
free (wsp->ws_usererr);
wsp->ws_usererr = value;
/* fall through */
default:
_wsplt_seterr (wsp, rc);
return 1;
}
if (value)
{
if (flg & _WSNF_QUOTE)
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD | _WSNF_NOEXPAND | flg;
newnode->v.word = value;
}
else if (*value == 0)
{
free (value);
/* Empty string is a special case */
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_NULL;
}
else
{
struct wordsplit ws;
int i, rc;
rc = _wsplt_subsplit (wsp, &ws, value, strlen (value),
WRDSF_NOVAR | WRDSF_NOCMD |
WRDSF_QUOTE);
free (value);
if (rc)
{
_wsplt_seterr_sub (wsp, &ws);
wordsplit_free (&ws);
return 1;
}
for (i = 0; i < ws.ws_wordc; i++)
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD |
_WSNF_NOEXPAND |
(i + 1 < ws.ws_wordc ? (flg & ~_WSNF_JOIN) : flg);
newnode->v.word = strdup (ws.ws_wordv[i]);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
}
wordsplit_free (&ws);
}
}
else if (wsp->ws_flags & WRDSF_KEEPUNDEF)
{
size_t size = *pend - start + 1;
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_WORD | _WSNF_NOEXPAND | flg;
newnode->v.word = malloc (size + 1);
if (!newnode->v.word)
return _wsplt_nomem (wsp);
memcpy (newnode->v.word, start, size);
newnode->v.word[size] = 0;
}
else
{
if (wsnode_new (wsp, &newnode))
return 1;
wsnode_insert (wsp, newnode, *ptail, 0);
*ptail = newnode;
newnode->flags = _WSNF_NULL;
}
return 0;
}
