/* arrayfunc.c -- High-level array functions used by other parts of the shell. */
-/* Copyright (C) 2001-2006 Free Software Foundation, Inc.
+/* Copyright (C) 2001-2009 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
- Bash is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2, or (at your option) any later
- version.
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bash is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with Bash; see the file COPYING. If not, write to the Free Software
- Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
#include "config.h"
#include "bashintl.h"
#include "shell.h"
+#include "pathexp.h"
#include "shmbutil.h"
extern int last_command_exit_value;
extern int array_needs_making;
-static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, int));
+static SHELL_VAR *bind_array_var_internal __P((SHELL_VAR *, arrayind_t, char *, char *, int));
+static char *quote_assign __P((const char *));
static void quote_array_assignment_chars __P((WORD_LIST *));
static char *array_value_internal __P((char *, int, int, int *));
/* Standard error message to use when encountering an invalid array subscript */
-char *bash_badsub_errmsg = N_("bad array subscript");
+const char * const bash_badsub_errmsg = N_("bad array subscript");
/* **************************************************************** */
/* */
return var;
}
+/* Convert a shell variable to an array variable. The original value is
+ saved as array[0]. */
+SHELL_VAR *
+convert_var_to_assoc (var)
+ SHELL_VAR *var;
+{
+ char *oldval;
+ HASH_TABLE *hash;
+
+ oldval = value_cell (var);
+ hash = assoc_create (0);
+ if (oldval)
+ assoc_insert (hash, "0", oldval);
+
+ FREE (value_cell (var));
+ var_setassoc (var, hash);
+
+ /* these aren't valid anymore */
+ var->dynamic_value = (sh_var_value_func_t *)NULL;
+ var->assign_func = (sh_var_assign_func_t *)NULL;
+
+ INVALIDATE_EXPORTSTR (var);
+ if (exported_p (var))
+ array_needs_making++;
+
+ VSETATTR (var, att_assoc);
+ VUNSETATTR (var, att_invisible);
+
+ return var;
+}
+
static SHELL_VAR *
-bind_array_var_internal (entry, ind, value, flags)
+bind_array_var_internal (entry, ind, key, value, flags)
SHELL_VAR *entry;
arrayind_t ind;
+ char *key;
char *value;
int flags;
{
{
dentry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
dentry->name = savestring (entry->name);
- newval = array_reference (array_cell (entry), ind);
+ if (assoc_p (entry))
+ newval = assoc_reference (assoc_cell (entry), key);
+ else
+ newval = array_reference (array_cell (entry), ind);
if (newval)
dentry->value = savestring (newval);
else
dentry->value[0] = '\0';
}
dentry->exportstr = 0;
- dentry->attributes = entry->attributes & ~(att_array|att_exported);
+ dentry->attributes = entry->attributes & ~(att_array|att_assoc|att_exported);
/* Leave the rest of the members uninitialized; the code doesn't look
at them. */
newval = make_variable_value (dentry, value, flags);
newval = make_variable_value (entry, value, flags);
if (entry->assign_func)
- (*entry->assign_func) (entry, newval, ind);
+ (*entry->assign_func) (entry, newval, ind, key);
+ else if (assoc_p (entry))
+ assoc_insert (assoc_cell (entry), key, newval);
else
array_insert (array_cell (entry), ind, newval);
FREE (newval);
entry = convert_var_to_array (entry);
/* ENTRY is an array variable, and ARRAY points to the value. */
- return (bind_array_var_internal (entry, ind, value, flags));
+ return (bind_array_var_internal (entry, ind, 0, value, flags));
+}
+
+SHELL_VAR *
+bind_array_element (entry, ind, value, flags)
+ SHELL_VAR *entry;
+ arrayind_t ind;
+ char *value;
+ int flags;
+{
+ return (bind_array_var_internal (entry, ind, 0, value, flags));
+}
+
+SHELL_VAR *
+bind_assoc_variable (entry, name, key, value, flags)
+ SHELL_VAR *entry;
+ char *name;
+ char *key;
+ char *value;
+ int flags;
+{
+ SHELL_VAR *dentry;
+ char *newval;
+
+ if (readonly_p (entry) || noassign_p (entry))
+ {
+ if (readonly_p (entry))
+ err_readonly (name);
+ return (entry);
+ }
+
+ return (bind_array_var_internal (entry, 0, key, value, flags));
}
/* Parse NAME, a lhs of an assignment statement of the form v[s], and
char *name, *value;
int flags;
{
- char *sub, *vname;
+ char *sub, *vname, *akey;
arrayind_t ind;
int sublen;
SHELL_VAR *entry;
return ((SHELL_VAR *)NULL);
}
- ind = array_expand_index (sub, sublen);
- if (ind < 0)
+ entry = find_variable (vname);
+
+ if (entry && assoc_p (entry))
{
- free (vname);
- err_badarraysub (name);
- return ((SHELL_VAR *)NULL);
+ sub[sublen-1] = '\0';
+ akey = expand_assignment_string_to_string (sub, 0); /* [ */
+ sub[sublen-1] = ']';
+ if (akey == 0 || *akey == 0)
+ {
+ free (vname);
+ err_badarraysub (name);
+ return ((SHELL_VAR *)NULL);
+ }
+ entry = bind_assoc_variable (entry, vname, akey, value, flags);
+ }
+ else
+ {
+ ind = array_expand_index (sub, sublen);
+ if (ind < 0)
+ {
+ free (vname);
+ err_badarraysub (name);
+ return ((SHELL_VAR *)NULL);
+ }
+ entry = bind_array_variable (vname, ind, value, flags);
}
-
- entry = bind_array_variable (vname, ind, value, flags);
free (vname);
return (entry);
/* Find the array variable corresponding to NAME. If there is no variable,
create a new array variable. If the variable exists but is not an array,
- convert it to an indexed array. If CHECK_FLAGS is non-zero, an existing
+ convert it to an indexed array. If FLAGS&1 is non-zero, an existing
variable is checked for the readonly or noassign attribute in preparation
- for assignment (e.g., by the `read' builtin). */
+ for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
+ create an associative array. */
SHELL_VAR *
-find_or_make_array_variable (name, check_flags)
+find_or_make_array_variable (name, flags)
char *name;
- int check_flags;
+ int flags;
{
SHELL_VAR *var;
var = find_variable (name);
if (var == 0)
- var = make_new_array_variable (name);
- else if (check_flags && (readonly_p (var) || noassign_p (var)))
+ var = (flags & 2) ? make_new_assoc_variable (name) : make_new_array_variable (name);
+ else if ((flags & 1) && (readonly_p (var) || noassign_p (var)))
{
if (readonly_p (var))
err_readonly (name);
return ((SHELL_VAR *)NULL);
}
- else if (array_p (var) == 0)
+ else if ((flags & 2) && array_p (var))
+ {
+ report_error (_("%s: cannot convert indexed to associative array"), name);
+ return ((SHELL_VAR *)NULL);
+ }
+ else if (array_p (var) == 0 && assoc_p (var) == 0)
var = convert_var_to_array (var);
return (var);
int flags;
{
SHELL_VAR *var;
+ int vflags;
- var = find_or_make_array_variable (name, 1);
+ vflags = 1;
+ if (flags & ASS_MKASSOC)
+ vflags |= 2;
+
+ var = find_or_make_array_variable (name, vflags);
if (var == 0)
return ((SHELL_VAR *)NULL);
for (l = list; l; l = l->next, i++)
if (var->assign_func)
- (*var->assign_func) (var, l->word->word, i);
+ (*var->assign_func) (var, l->word->word, i, 0);
else
array_insert (a, i, l->word->word);
return var;
}
WORD_LIST *
-expand_compound_array_assignment (value, flags)
+expand_compound_array_assignment (var, value, flags)
+ SHELL_VAR *var;
char *value;
int flags;
{
int flags;
{
ARRAY *a;
+ HASH_TABLE *h;
WORD_LIST *list;
char *w, *val, *nval;
int len, iflags;
arrayind_t ind, last_ind;
+ char *akey;
- a = array_cell (var);
+ a = (var && array_p (var)) ? array_cell (var) : (ARRAY *)0;
+ h = (var && assoc_p (var)) ? assoc_cell (var) : (HASH_TABLE *)0;
+
+ akey = (char *)0;
+ ind = 0;
/* Now that we are ready to assign values to the array, kill the existing
value. */
- if (a && (flags & ASS_APPEND) == 0)
- array_flush (a);
- last_ind = (flags & ASS_APPEND) ? array_max_index (a) + 1 : 0;
+ if ((flags & ASS_APPEND) == 0)
+ {
+ if (array_p (var) && a)
+ array_flush (a);
+ else if (assoc_p (var) && h)
+ assoc_flush (h);
+ }
+
+ last_ind = (a && (flags & ASS_APPEND)) ? array_max_index (a) + 1 : 0;
for (list = nlist; list; list = list->next)
{
/* XXX - changes for `+=' */
if (w[len] != ']' || (w[len+1] != '=' && (w[len+1] != '+' || w[len+2] != '=')))
{
+ if (assoc_p (var))
+ {
+ err_badarraysub (w);
+ continue;
+ }
nval = make_variable_value (var, w, flags);
if (var->assign_func)
- (*var->assign_func) (var, nval, last_ind);
+ (*var->assign_func) (var, nval, last_ind, 0);
else
array_insert (a, last_ind, nval);
FREE (nval);
if (ALL_ELEMENT_SUB (w[1]) && len == 2)
{
- report_error (_("%s: cannot assign to non-numeric index"), w);
+ if (assoc_p (var))
+ report_error (_("%s: invalid associative array key"), w);
+ else
+ report_error (_("%s: cannot assign to non-numeric index"), w);
continue;
}
- ind = array_expand_index (w + 1, len);
- if (ind < 0)
+ if (array_p (var))
{
- err_badarraysub (w);
- continue;
+ ind = array_expand_index (w + 1, len);
+ if (ind < 0)
+ {
+ err_badarraysub (w);
+ continue;
+ }
+
+ last_ind = ind;
}
- last_ind = ind;
+ else if (assoc_p (var))
+ {
+ akey = substring (w, 1, len);
+ if (akey == 0 || *akey == 0)
+ {
+ err_badarraysub (w);
+ continue;
+ }
+ }
+
/* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
if (w[len + 1] == '+' && w[len + 2] == '=')
{
else
val = w + len + 2;
}
+ else if (assoc_p (var))
+ {
+ report_error (_("%s: %s: must use subscript when assigning associative array"), var->name, w);
+ continue;
+ }
else /* No [ind]=value, just a stray `=' */
{
ind = last_ind;
if (integer_p (var))
this_command_name = (char *)NULL; /* no command name for errors */
- bind_array_var_internal (var, ind, val, iflags);
+ bind_array_var_internal (var, ind, akey, val, iflags);
last_ind++;
}
}
if (value == 0)
return var;
- nlist = expand_compound_array_assignment (value, flags);
+ nlist = expand_compound_array_assignment (var, value, flags);
assign_compound_array_list (var, nlist, flags);
if (nlist)
return (var);
}
+/* Quote globbing chars and characters in $IFS before the `=' in an assignment
+ statement (usually a compound array assignment) to protect them from
+ unwanted filename expansion or word splitting. */
+static char *
+quote_assign (string)
+ const char *string;
+{
+ size_t slen;
+ int saw_eq;
+ char *temp, *t;
+ const char *s, *send;
+ DECLARE_MBSTATE;
+
+ slen = strlen (string);
+ send = string + slen;
+
+ t = temp = (char *)xmalloc (slen * 2 + 1);
+ saw_eq = 0;
+ for (s = string; *s; )
+ {
+ if (*s == '=')
+ saw_eq = 1;
+ if (saw_eq == 0 && (glob_char_p (s) || isifs (*s)))
+ *t++ = '\\';
+
+ COPY_CHAR_P (t, s, send);
+ }
+ *t = '\0';
+ return temp;
+}
+
/* For each word in a compound array assignment, if the word looks like
- [ind]=value, quote the `[' and `]' before the `=' to protect them from
- unwanted filename expansion. */
+ [ind]=value, quote globbing chars and characters in $IFS before the `='. */
static void
quote_array_assignment_chars (list)
WORD_LIST *list;
{
- char *s, *t, *nword;
- int saw_eq;
+ char *nword;
WORD_LIST *l;
for (l = list; l; l = l->next)
/* Don't bother if it doesn't look like [ind]=value */
if (l->word->word[0] != '[' || xstrchr (l->word->word, '=') == 0) /* ] */
continue;
- s = nword = (char *)xmalloc (strlen (l->word->word) * 2 + 1);
- saw_eq = 0;
- for (t = l->word->word; *t; )
- {
- if (*t == '=')
- saw_eq = 1;
- if (saw_eq == 0 && (*t == '[' || *t == ']'))
- *s++ = '\\';
- *s++ = *t++;
- }
- *s = '\0';
+ nword = quote_assign (l->word->word);
free (l->word->word);
l->word->word = nword;
}
c = s[i];
if (c == 0)
- break;
+ break;
else if (c == '[')
count++;
else if (c == ']')
{
int len;
arrayind_t ind;
+ char *akey;
ARRAY_ELEMENT *ae;
len = skipsubscript (sub, 0);
unbind_variable (var->name);
return (0);
}
- ind = array_expand_index (sub, len+1);
- if (ind < 0)
+
+ if (assoc_p (var))
{
- builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
- return -1;
+ akey = expand_assignment_string_to_string (sub, 0); /* [ */
+ if (akey == 0 || *akey == 0)
+ {
+ builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
+ return -1;
+ }
+ assoc_remove (assoc_cell (var), akey);
+ }
+ else
+ {
+ ind = array_expand_index (sub, len+1);
+ if (ind < 0)
+ {
+ builtin_error ("[%s]: %s", sub, _(bash_badsub_errmsg));
+ return -1;
+ }
+ ae = array_remove (array_cell (var), ind);
+ if (ae)
+ array_dispose_element (ae);
}
- ae = array_remove (array_cell (var), ind);
- if (ae)
- array_dispose_element (ae);
+
return 0;
}
}
}
+/* Format and output an associative array assignment in compound form
+ VAR=(VALUES), suitable for re-use as input. */
+void
+print_assoc_assignment (var, quoted)
+ SHELL_VAR *var;
+ int quoted;
+{
+ char *vstr;
+
+ vstr = assoc_to_assign (assoc_cell (var), quoted);
+
+ if (vstr == 0)
+ printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
+ else
+ {
+ printf ("%s=%s\n", var->name, vstr);
+ free (vstr);
+ }
+}
+
/***********************************************************************/
/* */
/* Utility functions to manage arrays and their contents for expansion */
/* Return a string containing the elements in the array and subscript
described by S. If the subscript is * or @, obeys quoting rules akin
to the expansion of $* and $@ including double quoting. If RTYPE
- is non-null it gets 1 if the array reference is name[@] or name[*]
- and 0 otherwise. */
+ is non-null it gets 1 if the array reference is name[*], 2 if the
+ reference is name[@], and 0 otherwise. */
static char *
array_value_internal (s, quoted, allow_all, rtype)
char *s;
{
int len;
arrayind_t ind;
+ char *akey;
char *retval, *t, *temp;
WORD_LIST *l;
SHELL_VAR *var;
}
else if (var == 0 || value_cell (var) == 0)
return ((char *)NULL);
- else if (array_p (var) == 0)
+ else if (array_p (var) == 0 && assoc_p (var) == 0)
l = add_string_to_list (value_cell (var), (WORD_LIST *)NULL);
+ else if (assoc_p (var))
+ {
+ l = assoc_to_word_list (assoc_cell (var));
+ if (l == (WORD_LIST *)NULL)
+ return ((char *)NULL);
+ }
else
{
l = array_to_word_list (array_cell (var));
{
if (rtype)
*rtype = 0;
- ind = array_expand_index (t, len);
- if (ind < 0)
+ if (var == 0 || array_p (var) || assoc_p (var) == 0)
{
- if (var)
- err_badarraysub (var->name);
- else
+ ind = array_expand_index (t, len);
+ if (ind < 0)
{
- t[-1] = '\0';
- err_badarraysub (s);
- t[-1] = '['; /* ] */
+index_error:
+ if (var)
+ err_badarraysub (var->name);
+ else
+ {
+ t[-1] = '\0';
+ err_badarraysub (s);
+ t[-1] = '['; /* ] */
+ }
+ return ((char *)NULL);
}
- return ((char *)NULL);
}
+ else if (assoc_p (var))
+ {
+ t[len - 1] = '\0';
+ akey = expand_assignment_string_to_string (t, 0); /* [ */
+ t[len - 1] = ']';
+ if (akey == 0 || *akey == 0)
+ goto index_error;
+ }
+
if (var == 0)
return ((char *)NULL);
- if (array_p (var) == 0)
+ if (array_p (var) == 0 && assoc_p (var) == 0)
return (ind == 0 ? value_cell (var) : (char *)NULL);
- retval = array_reference (array_cell (var), ind);
+ else if (assoc_p (var))
+ retval = assoc_reference (assoc_cell (var), akey);
+ else
+ retval = array_reference (array_cell (var), ind);
}
return retval;
if (var == 0 || ALL_ELEMENT_SUB (t[0]) == 0 || t[1] != ']')
return (char *)NULL;
- if (array_p (var) == 0)
+ if (array_p (var) == 0 && assoc_p (var) == 0)
l = add_string_to_list ("0", (WORD_LIST *)NULL);
+ else if (assoc_p (var))
+ l = assoc_keys_to_word_list (assoc_cell (var));
else
- {
- l = array_keys_to_word_list (array_cell (var));
- if (l == (WORD_LIST *)NULL)
- return ((char *) NULL);
- }
+ l = array_keys_to_word_list (array_cell (var));
+ if (l == (WORD_LIST *)NULL)
+ return ((char *) NULL);
if (t[0] == '*' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)))
{
projects / thirdparty / bash.git / blobdiff