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ruby--ruby/hash.c
matz edbe98d848 * object.c (Init_Object): should do exact match for Module#==. 
* compar.c (cmp_eq): returns 'false' if <=> returns 'nil'.

* compar.c (cmp_gt,cmp_ge,cmp_lt,cmp_le,cmp_between): ditto.

* pack.c (pack_pack): should propagate taintedness.

* pack.c (pack_unpack): ditto.

* eval.c (rb_thread_schedule): need to preserve errno before
  calling rb_trap_exec().

* regex.c (calculate_must_string): a bug in charset/charset_not
  parsing.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2482 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2002-05-21 05:39:19 +00:00

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/**********************************************************************
hash.c -
$Author$
$Date$
created at: Mon Nov 22 18:51:18 JST 1993
Copyright (C) 1993-2002 Yukihiro Matsumoto
Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
Copyright (C) 2000 Information-technology Promotion Agency, Japan
**********************************************************************/
#include "ruby.h"
#include "st.h"
#include "util.h"
#include "rubysig.h"
#define HASH_DELETED FL_USER1
#define HASH_PROC_DEFAULT FL_USER2
static void
rb_hash_modify(hash)
VALUE hash;
{
if (OBJ_FROZEN(hash)) rb_error_frozen("hash");
if (!OBJ_TAINTED(hash) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't modify hash");
}
VALUE
rb_hash_freeze(hash)
VALUE hash;
{
return rb_obj_freeze(hash);
}
VALUE rb_cHash;
static VALUE envtbl;
static ID id_hash, id_yield, id_default;
VALUE
rb_hash(obj)
VALUE obj;
{
return rb_funcall(obj, id_hash, 0);
}
static VALUE
eql(args)
VALUE *args;
{
return (VALUE)rb_eql(args[0], args[1]);
}
static VALUE
eql_failed()
{
return Qfalse;
}
static VALUE
any_eql(args)
VALUE *args;
{
return rb_rescue(eql, (VALUE)args, eql_failed, 0);
}
static int
rb_any_cmp(a, b)
VALUE a, b;
{
VALUE args[2];
if (FIXNUM_P(a) && FIXNUM_P(b)) {
return a != b;
}
if (TYPE(a) == T_STRING && RBASIC(a)->klass == rb_cString &&
TYPE(b) == T_STRING && RBASIC(b)->klass == rb_cString) {
return rb_str_cmp(a, b);
}
if (SYMBOL_P(a) && SYMBOL_P(b)) {
return a != b;
}
if (a == Qundef || b == Qundef) return -1;
args[0] = a;
args[1] = b;
return !rb_with_disable_interrupt(eql, (VALUE)args);
}
static int
rb_any_hash(a)
VALUE a;
{
VALUE hval;
switch (TYPE(a)) {
case T_FIXNUM:
case T_SYMBOL:
return (int)a;
break;
case T_STRING:
return rb_str_hash(a);
break;
default:
DEFER_INTS;
hval = rb_funcall(a, id_hash, 0);
if (FIXNUM_P(hval)) {
hval %= 536870923;
}
else {
hval = rb_funcall(hval, '%', 1, INT2FIX(536870923));
}
ENABLE_INTS;
return (int)FIX2LONG(hval);
}
}
static struct st_hash_type objhash = {
rb_any_cmp,
rb_any_hash,
};
struct rb_hash_foreach_arg {
VALUE hash;
enum st_retval (*func)();
char *arg;
};
static int
rb_hash_foreach_iter(key, value, arg)
VALUE key, value;
struct rb_hash_foreach_arg *arg;
{
int status;
st_table *tbl = RHASH(arg->hash)->tbl;
struct st_table_entry **bins = tbl->bins;
if (key == Qundef) return ST_CONTINUE;
status = (*arg->func)(key, value, arg->arg);
if (RHASH(arg->hash)->tbl != tbl || RHASH(arg->hash)->tbl->bins != bins){
rb_raise(rb_eIndexError, "rehash occurred during iteration");
}
return status;
}
static VALUE
rb_hash_foreach_call(arg)
struct rb_hash_foreach_arg *arg;
{
st_foreach(RHASH(arg->hash)->tbl, rb_hash_foreach_iter, arg);
return Qnil;
}
static VALUE
rb_hash_foreach_ensure(hash)
VALUE hash;
{
RHASH(hash)->iter_lev--;
if (RHASH(hash)->iter_lev == 0) {
if (FL_TEST(hash, HASH_DELETED)) {
st_cleanup_safe(RHASH(hash)->tbl, Qundef);
FL_UNSET(hash, HASH_DELETED);
}
}
return 0;
}
static int
rb_hash_foreach(hash, func, farg)
VALUE hash;
enum st_retval (*func)();
char *farg;
{
struct rb_hash_foreach_arg arg;
RHASH(hash)->iter_lev++;
arg.hash = hash;
arg.func = func;
arg.arg = farg;
return rb_ensure(rb_hash_foreach_call, (VALUE)&arg, rb_hash_foreach_ensure, hash);
}
static VALUE
rb_hash_s_alloc(klass)
VALUE klass;
{
NEWOBJ(hash, struct RHash);
OBJSETUP(hash, klass, T_HASH);
hash->ifnone = Qnil;
hash->tbl = st_init_table(&objhash);
return (VALUE)hash;
}
VALUE
rb_hash_new()
{
return rb_hash_s_alloc(rb_cHash);
}
static VALUE
rb_hash_initialize(argc, argv, hash)
int argc;
VALUE *argv;
VALUE hash;
{
VALUE ifnone;
rb_hash_modify(hash);
if (rb_block_given_p()) {
if (argc > 0) {
rb_raise(rb_eArgError, "wrong number of arguments");
}
RHASH(hash)->ifnone = rb_f_lambda();
FL_SET(hash, HASH_PROC_DEFAULT);
}
else {
rb_scan_args(argc, argv, "01", &ifnone);
RHASH(hash)->ifnone = ifnone;
}
return hash;
}
static VALUE
rb_hash_s_create(argc, argv, klass)
int argc;
VALUE *argv;
VALUE klass;
{
VALUE hash;
int i;
if (argc == 1 && TYPE(argv[0]) == T_HASH) {
VALUE hash = rb_obj_alloc(klass);
RHASH(hash)->ifnone = Qnil;
RHASH(hash)->tbl = st_copy(RHASH(argv[0])->tbl);
return hash;
}
if (argc % 2 != 0) {
rb_raise(rb_eArgError, "odd number args for Hash");
}
hash = rb_hash_s_alloc(klass);
for (i=0; i<argc; i+=2) {
st_insert(RHASH(hash)->tbl, argv[i], argv[i+1]);
}
return hash;
}
static VALUE
rb_hash_clone(hash)
VALUE hash;
{
VALUE clone = rb_obj_clone(hash);
RHASH(clone)->ifnone = RHASH(hash)->ifnone;
RHASH(clone)->tbl = (st_table*)st_copy(RHASH(hash)->tbl);
return clone;
}
static VALUE
to_hash(hash)
VALUE hash;
{
return rb_convert_type(hash, T_HASH, "Hash", "to_hash");
}
static int
rb_hash_rehash_i(key, value, tbl)
VALUE key, value;
st_table *tbl;
{
if (key != Qundef) st_insert(tbl, key, value);
return ST_CONTINUE;
}
static VALUE
rb_hash_rehash(hash)
VALUE hash;
{
st_table *tbl;
tbl = st_init_table_with_size(&objhash, RHASH(hash)->tbl->num_entries);
st_foreach(RHASH(hash)->tbl, rb_hash_rehash_i, tbl);
st_free_table(RHASH(hash)->tbl);
RHASH(hash)->tbl = tbl;
return hash;
}
VALUE
rb_hash_aref(hash, key)
VALUE hash, key;
{
VALUE val;
if (!st_lookup(RHASH(hash)->tbl, key, &val)) {
return rb_funcall(hash, id_default, 1, key);
}
return val;
}
static VALUE
rb_hash_fetch(argc, argv, hash)
int argc;
VALUE *argv;
VALUE hash;
{
VALUE key, if_none;
VALUE val;
rb_scan_args(argc, argv, "11", &key, &if_none);
if (!st_lookup(RHASH(hash)->tbl, key, &val)) {
if (rb_block_given_p()) {
if (argc > 1) {
rb_raise(rb_eArgError, "wrong number of arguments", argc);
}
return rb_yield(key);
}
if (argc == 1) {
rb_raise(rb_eIndexError, "key not found");
}
return if_none;
}
return val;
}
static VALUE
rb_hash_default(argc, argv, hash)
int argc;
VALUE *argv;
VALUE hash;
{
VALUE key;
rb_scan_args(argc, argv, "01", &key);
if (FL_TEST(hash, HASH_PROC_DEFAULT)) {
return rb_funcall(RHASH(hash)->ifnone, id_yield, 2, hash, key);
}
return RHASH(hash)->ifnone;
}
static VALUE
rb_hash_set_default(hash, ifnone)
VALUE hash, ifnone;
{
rb_hash_modify(hash);
RHASH(hash)->ifnone = ifnone;
FL_UNSET(hash, HASH_PROC_DEFAULT);
return ifnone;
}
static int
index_i(key, value, args)
VALUE key, value;
VALUE *args;
{
if (rb_equal(value, args[0])) {
args[1] = key;
return ST_STOP;
}
return ST_CONTINUE;
}
static VALUE
rb_hash_index(hash, value)
VALUE hash, value;
{
VALUE args[2];
args[0] = value;
args[1] = Qnil;
st_foreach(RHASH(hash)->tbl, index_i, args);
return args[1];
}
static VALUE
rb_hash_indexes(argc, argv, hash)
int argc;
VALUE *argv;
VALUE hash;
{
VALUE indexes;
int i;
rb_warn("Hash#%s is deprecated; use Hash#select",
rb_id2name(rb_frame_last_func()));
indexes = rb_ary_new2(argc);
for (i=0; i<argc; i++) {
RARRAY(indexes)->ptr[i] = rb_hash_aref(hash, argv[i]);
RARRAY(indexes)->len++;
}
return indexes;
}
VALUE
rb_hash_delete(hash, key)
VALUE hash, key;
{
VALUE val;
rb_hash_modify(hash);
if (RHASH(hash)->iter_lev > 0) {
if (st_delete_safe(RHASH(hash)->tbl, &key, &val, Qundef)) {
FL_SET(hash, HASH_DELETED);
return val;
}
}
else if (st_delete(RHASH(hash)->tbl, &key, &val))
return val;
if (rb_block_given_p()) {
return rb_yield(key);
}
return Qnil;
}
struct shift_var {
int stop;
VALUE key;
VALUE val;
};
static int
shift_i(key, value, var)
VALUE key, value;
struct shift_var *var;
{
if (key == Qundef) return ST_CONTINUE;
if (var->stop) return ST_STOP;
var->stop = 1;
var->key = key;
var->val = value;
return ST_DELETE;
}
static VALUE
rb_hash_shift(hash)
VALUE hash;
{
struct shift_var var;
rb_hash_modify(hash);
var.stop = 0;
st_foreach(RHASH(hash)->tbl, shift_i, &var);
if (var.stop == 0) return RHASH(hash)->ifnone;
return rb_assoc_new(var.key, var.val);
}
static int
delete_if_i(key, value)
VALUE key, value;
{
if (key == Qundef) return ST_CONTINUE;
if (RTEST(rb_yield(rb_assoc_new(key, value))))
return ST_DELETE;
return ST_CONTINUE;
}
VALUE
rb_hash_delete_if(hash)
VALUE hash;
{
rb_hash_modify(hash);
rb_hash_foreach(hash, delete_if_i, 0);
return hash;
}
VALUE
rb_hash_reject_bang(hash)
VALUE hash;
{
int n = RHASH(hash)->tbl->num_entries;
rb_hash_delete_if(hash);
if (n == RHASH(hash)->tbl->num_entries) return Qnil;
return hash;
}
static VALUE
rb_hash_reject(hash)
VALUE hash;
{
return rb_hash_delete_if(rb_obj_dup(hash));
}
static int
select_i(key, value, result)
VALUE key, value;
{
VALUE assoc;
if (key == Qundef) return ST_CONTINUE;
assoc = rb_assoc_new(key, value);
if (RTEST(rb_yield(assoc)))
rb_ary_push(result, assoc);
return ST_CONTINUE;
}
VALUE
rb_hash_select(argc, argv, hash)
int argc;
VALUE *argv;
VALUE hash;
{
VALUE result = rb_ary_new();
long i;
if (rb_block_given_p()) {
if (argc > 0) {
rb_raise(rb_eArgError, "wrong number arguments(%d for 0)", argc);
}
rb_hash_foreach(hash, select_i, result);
}
else {
for (i=0; i<argc; i++) {
rb_ary_push(result, rb_hash_aref(hash, argv[i]));
}
}
return result;
}
static int
clear_i(key, value, dummy)
VALUE key, value, dummy;
{
return ST_DELETE;
}
static VALUE
rb_hash_clear(hash)
VALUE hash;
{
rb_hash_modify(hash);
st_foreach(RHASH(hash)->tbl, clear_i, 0);
return hash;
}
VALUE
rb_hash_aset(hash, key, val)
VALUE hash, key, val;
{
rb_hash_modify(hash);
if (TYPE(key) != T_STRING || st_lookup(RHASH(hash)->tbl, key, 0)) {
st_insert(RHASH(hash)->tbl, key, val);
}
else {
st_add_direct(RHASH(hash)->tbl, rb_str_new4(key), val);
}
return val;
}
static int
replace_i(key, val, hash)
VALUE key, val, hash;
{
if (key != Qundef) {
rb_hash_aset(hash, key, val);
}
return ST_CONTINUE;
}
static VALUE
rb_hash_replace(hash, hash2)
VALUE hash, hash2;
{
hash2 = to_hash(hash2);
rb_hash_clear(hash);
st_foreach(RHASH(hash2)->tbl, replace_i, hash);
return hash;
}
static VALUE
rb_hash_size(hash)
VALUE hash;
{
return INT2FIX(RHASH(hash)->tbl->num_entries);
}
static VALUE
rb_hash_empty_p(hash)
VALUE hash;
{
if (RHASH(hash)->tbl->num_entries == 0)
return Qtrue;
return Qfalse;
}
static int
each_value_i(key, value)
VALUE key, value;
{
if (key == Qundef) return ST_CONTINUE;
rb_yield(value);
return ST_CONTINUE;
}
static VALUE
rb_hash_each_value(hash)
VALUE hash;
{
rb_hash_foreach(hash, each_value_i, 0);
return hash;
}
static int
each_key_i(key, value)
VALUE key, value;
{
if (key == Qundef) return ST_CONTINUE;
rb_yield(key);
return ST_CONTINUE;
}
static VALUE
rb_hash_each_key(hash)
VALUE hash;
{
rb_hash_foreach(hash, each_key_i, 0);
return hash;
}
static int
each_pair_i(key, value)
VALUE key, value;
{
if (key == Qundef) return ST_CONTINUE;
rb_yield(rb_assoc_new(key, value));
return ST_CONTINUE;
}
static VALUE
rb_hash_each_pair(hash)
VALUE hash;
{
rb_hash_foreach(hash, each_pair_i, 0);
return hash;
}
static int
to_a_i(key, value, ary)
VALUE key, value, ary;
{
if (key == Qundef) return ST_CONTINUE;
rb_ary_push(ary, rb_assoc_new(key, value));
return ST_CONTINUE;
}
static VALUE
rb_hash_to_a(hash)
VALUE hash;
{
VALUE ary;
ary = rb_ary_new();
st_foreach(RHASH(hash)->tbl, to_a_i, ary);
if (OBJ_TAINTED(hash)) OBJ_TAINT(ary);
return ary;
}
static VALUE
rb_hash_sort(hash)
VALUE hash;
{
VALUE entries = rb_hash_to_a(hash);
rb_ary_sort_bang(entries);
return entries;
}
static int
inspect_i(key, value, str)
VALUE key, value, str;
{
VALUE str2;
if (key == Qundef) return ST_CONTINUE;
if (RSTRING(str)->len > 1) {
rb_str_cat2(str, ", ");
}
str2 = rb_inspect(key);
rb_str_buf_append(str, str2);
OBJ_INFECT(str, str2);
rb_str_buf_cat2(str, "=>");
str2 = rb_inspect(value);
rb_str_buf_append(str, str2);
OBJ_INFECT(str, str2);
return ST_CONTINUE;
}
static VALUE
inspect_hash(hash)
VALUE hash;
{
VALUE str;
str = rb_str_buf_new2("{");
st_foreach(RHASH(hash)->tbl, inspect_i, str);
rb_str_buf_cat2(str, "}");
OBJ_INFECT(str, hash);
return str;
}
static VALUE
rb_hash_inspect(hash)
VALUE hash;
{
if (RHASH(hash)->tbl == 0 || RHASH(hash)->tbl->num_entries == 0)
return rb_str_new2("{}");
if (rb_inspecting_p(hash)) return rb_str_new2("{...}");
return rb_protect_inspect(inspect_hash, hash, 0);
}
static VALUE
to_s_hash(hash)
VALUE hash;
{
return rb_ary_to_s(rb_hash_to_a(hash));
}
static VALUE
rb_hash_to_s(hash)
VALUE hash;
{
if (rb_inspecting_p(hash)) return rb_str_new2("{...}");
return rb_protect_inspect(to_s_hash, hash, 0);
}
static VALUE
rb_hash_to_hash(hash)
VALUE hash;
{
return hash;
}
static int
keys_i(key, value, ary)
VALUE key, value, ary;
{
if (key == Qundef) return ST_CONTINUE;
rb_ary_push(ary, key);
return ST_CONTINUE;
}
static VALUE
rb_hash_keys(hash)
VALUE hash;
{
VALUE ary;
ary = rb_ary_new();
st_foreach(RHASH(hash)->tbl, keys_i, ary);
return ary;
}
static int
values_i(key, value, ary)
VALUE key, value, ary;
{
if (key == Qundef) return ST_CONTINUE;
rb_ary_push(ary, value);
return ST_CONTINUE;
}
static VALUE
rb_hash_values(hash)
VALUE hash;
{
VALUE ary;
ary = rb_ary_new();
st_foreach(RHASH(hash)->tbl, values_i, ary);
return ary;
}
static VALUE
rb_hash_has_key(hash, key)
VALUE hash;
VALUE key;
{
if (st_lookup(RHASH(hash)->tbl, key, 0)) {
return Qtrue;
}
return Qfalse;
}
static int
rb_hash_search_value(key, value, data)
VALUE key, value, *data;
{
if (key == Qundef) return ST_CONTINUE;
if (rb_equal(value, data[1])) {
data[0] = Qtrue;
return ST_STOP;
}
return ST_CONTINUE;
}
static VALUE
rb_hash_has_value(hash, val)
VALUE hash;
VALUE val;
{
VALUE data[2];
data[0] = Qfalse;
data[1] = val;
st_foreach(RHASH(hash)->tbl, rb_hash_search_value, data);
return data[0];
}
struct equal_data {
int result;
st_table *tbl;
};
static int
equal_i(key, val1, data)
VALUE key, val1;
struct equal_data *data;
{
VALUE val2;
if (key == Qundef) return ST_CONTINUE;
if (!st_lookup(data->tbl, key, &val2)) {
data->result = Qfalse;
return ST_STOP;
}
if (!rb_equal(val1, val2)) {
data->result = Qfalse;
return ST_STOP;
}
return ST_CONTINUE;
}
static VALUE
rb_hash_equal(hash1, hash2)
VALUE hash1, hash2;
{
struct equal_data data;
if (hash1 == hash2) return Qtrue;
if (TYPE(hash2) != T_HASH) return Qfalse;
if (RHASH(hash1)->tbl->num_entries != RHASH(hash2)->tbl->num_entries)
return Qfalse;
data.tbl = RHASH(hash2)->tbl;
data.result = Qtrue;
st_foreach(RHASH(hash1)->tbl, equal_i, &data);
return data.result;
}
static int
rb_hash_invert_i(key, value, hash)
VALUE key, value;
VALUE hash;
{
if (key == Qundef) return ST_CONTINUE;
rb_hash_aset(hash, value, key);
return ST_CONTINUE;
}
static VALUE
rb_hash_invert(hash)
VALUE hash;
{
VALUE h = rb_hash_new();
st_foreach(RHASH(hash)->tbl, rb_hash_invert_i, h);
return h;
}
static int
rb_hash_update_i(key, value, hash)
VALUE key, value;
VALUE hash;
{
if (key == Qundef) return ST_CONTINUE;
rb_hash_aset(hash, key, value);
return ST_CONTINUE;
}
static int
rb_hash_update_block_i(key, value, hash)
VALUE key, value;
VALUE hash;
{
if (key == Qundef) return ST_CONTINUE;
if (rb_hash_has_key(hash, key)) {
value = rb_yield(rb_ary_new3(3, key, rb_hash_aref(hash, key), value));
}
rb_hash_aset(hash, key, value);
return ST_CONTINUE;
}
static VALUE
rb_hash_update(hash1, hash2)
VALUE hash1, hash2;
{
hash2 = to_hash(hash2);
if (rb_block_given_p()) {
st_foreach(RHASH(hash2)->tbl, rb_hash_update_block_i, hash1);
}
else {
st_foreach(RHASH(hash2)->tbl, rb_hash_update_i, hash1);
}
return hash1;
}
static int path_tainted = -1;
static char **origenviron;
#ifdef NT
#define GET_ENVIRON(e) (e = win32_get_environ())
#define FREE_ENVIRON(e) win32_free_environ(e)
static char **my_environ;
#undef environ
#define environ my_environ
#else
extern char **environ;
#define GET_ENVIRON(e) (e)
#define FREE_ENVIRON(e)
#endif
static VALUE
env_delete(obj, name)
VALUE obj, name;
{
char *nam, *val;
rb_secure(4);
StringValue(name);
nam = RSTRING(name)->ptr;
if (strlen(nam) != RSTRING(name)->len) {
rb_raise(rb_eArgError, "bad environment variable name");
}
val = getenv(nam);
if (val) {
VALUE value = rb_tainted_str_new2(val);
ruby_setenv(nam, 0);
if (strcmp(nam, "PATH") == 0 && !OBJ_TAINTED(name)) {
path_tainted = 0;
}
return value;
}
return Qnil;
}
static VALUE
env_delete_m(obj, name)
VALUE obj, name;
{
VALUE val = env_delete(obj, name);
if (rb_block_given_p()) rb_yield(name);
return val;
}
static VALUE
rb_f_getenv(obj, name)
VALUE obj, name;
{
char *nam, *env;
StringValue(name);
nam = RSTRING(name)->ptr;
if (strlen(nam) != RSTRING(name)->len) {
rb_raise(rb_eArgError, "bad environment variable name");
}
env = getenv(nam);
if (env) {
if (strcmp(nam, "PATH") == 0 && !rb_env_path_tainted())
return rb_str_new2(env);
return rb_tainted_str_new2(env);
}
return Qnil;
}
static VALUE
env_fetch(argc, argv)
int argc;
VALUE *argv;
{
VALUE key, if_none;
char *nam, *env;
rb_scan_args(argc, argv, "11", &key, &if_none);
StringValue(key);
nam = RSTRING(key)->ptr;
if (strlen(nam) != RSTRING(key)->len) {
rb_raise(rb_eArgError, "bad environment variable name");
}
env = getenv(nam);
if (!env) {
if (rb_block_given_p()) {
if (argc > 1) {
rb_raise(rb_eArgError, "wrong number of arguments");
}
return rb_yield(key);
}
if (argc == 1) {
rb_raise(rb_eIndexError, "key not found");
}
return if_none;
}
if (strcmp(nam, "PATH") == 0 && !rb_env_path_tainted())
return rb_str_new2(env);
return rb_tainted_str_new2(env);
}
static void
path_tainted_p(path)
char *path;
{
path_tainted = rb_path_check(path)?0:1;
}
int
rb_env_path_tainted()
{
if (path_tainted < 0) {
path_tainted_p(getenv("PATH"));
}
return path_tainted;
}
static int
envix(nam)
char *nam;
{
register int i, len = strlen(nam);
char **env;
env = GET_ENVIRON(environ);
for (i = 0; env[i]; i++) {
if (
#ifdef WIN32
strnicmp(env[i],nam,len) == 0
#else
memcmp(env[i],nam,len) == 0
#endif
&& env[i][len] == '=')
break; /* memcmp must come first to avoid */
} /* potential SEGV's */
FREE_ENVIRON(environ);
return i;
}
void
ruby_setenv(name, value)
const char *name;
const char *value;
{
#if defined(WIN32) && !defined(__CYGWIN32__)
/* The sane way to deal with the environment.
* Has these advantages over putenv() & co.:
* * enables us to store a truly empty value in the
* environment (like in UNIX).
* * we don't have to deal with RTL globals, bugs and leaks.
* * Much faster.
* Why you may want to enable USE_WIN32_RTL_ENV:
* * environ[] and RTL functions will not reflect changes,
* which might be an issue if extensions want to access
* the env. via RTL. This cuts both ways, since RTL will
* not see changes made by extensions that call the Win32
* functions directly, either.
* GSAR 97-06-07
*
* REMARK: USE_WIN32_RTL_ENV is already obsoleted since we don't use
* RTL's environ global variable directly yet.
*/
SetEnvironmentVariable(name,value);
#elif defined __CYGWIN__
#undef setenv
#undef unsetenv
if (value)
setenv(name,value,1);
else
unsetenv(name);
#else /* WIN32 */
int i=envix(name); /* where does it go? */
if (environ == origenviron) { /* need we copy environment? */
int j;
int max;
char **tmpenv;
for (max = i; environ[max]; max++) ;
tmpenv = ALLOC_N(char*, max+2);
for (j=0; j<max; j++) /* copy environment */
tmpenv[j] = strdup(environ[j]);
tmpenv[max] = 0;
environ = tmpenv; /* tell exec where it is now */
}
if (!value) {
if (environ != origenviron) {
char **envp = origenviron;
while (*envp && *envp != environ[i]) envp++;
if (!*envp)
free(environ[i]);
}
while (environ[i]) {
environ[i] = environ[i+1];
i++;
}
return;
}
if (!environ[i]) { /* does not exist yet */
REALLOC_N(environ, char*, i+2); /* just expand it a bit */
environ[i+1] = 0; /* make sure it's null terminated */
}
else {
if (environ[i] != origenviron[i])
free(environ[i]);
}
environ[i] = ALLOC_N(char, strlen(name) + strlen(value) + 2);
#ifndef MSDOS
sprintf(environ[i],"%s=%s",name,value); /* all that work just for this */
#else
/* MS-DOS requires environment variable names to be in uppercase */
/* [Tom Dinger, 27 August 1990: Well, it doesn't _require_ it, but
* some utilities and applications may break because they only look
* for upper case strings. (Fixed strupr() bug here.)]
*/
strcpy(environ[i],name); strupr(environ[i]);
sprintf(environ[i] + strlen(name),"=%s", value);
#endif /* MSDOS */
#endif /* WIN32 */
}
void
ruby_unsetenv(name)
const char *name;
{
ruby_setenv(name, 0);
}
static VALUE
env_aset(obj, nm, val)
VALUE obj, nm, val;
{
char *name, *value;
if (rb_safe_level() >= 4) {
rb_raise(rb_eSecurityError, "cannot change environment variable");
}
if (NIL_P(val)) {
env_delete(obj, nm);
return Qnil;
}
StringValue(nm);
StringValue(val);
name = RSTRING(nm)->ptr;
value = RSTRING(val)->ptr;
if (strlen(name) != RSTRING(nm)->len)
rb_raise(rb_eArgError, "bad environment variable name");
if (strlen(value) != RSTRING(val)->len)
rb_raise(rb_eArgError, "bad environment variable value");
ruby_setenv(name, value);
if (strcmp(name, "PATH") == 0) {
if (OBJ_TAINTED(val)) {
/* already tainted, no check */
path_tainted = 1;
return val;
}
else {
path_tainted_p(value);
}
}
return val;
}
static VALUE
env_keys()
{
char **env;
VALUE ary = rb_ary_new();
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_ary_push(ary, rb_tainted_str_new(*env, s-*env));
}
env++;
}
FREE_ENVIRON(environ);
return ary;
}
static VALUE
env_each_key(hash)
VALUE hash;
{
char **env;
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_yield(rb_tainted_str_new(*env, s-*env));
}
env++;
}
FREE_ENVIRON(environ);
return Qnil;
}
static VALUE
env_values()
{
char **env;
VALUE ary = rb_ary_new();
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_ary_push(ary, rb_tainted_str_new2(s+1));
}
env++;
}
FREE_ENVIRON(environ);
return ary;
}
static VALUE
env_each_value(hash)
VALUE hash;
{
char **env;
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_yield(rb_tainted_str_new2(s+1));
}
env++;
}
FREE_ENVIRON(environ);
return Qnil;
}
static VALUE
env_each(hash)
VALUE hash;
{
char **env;
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_yield(rb_assoc_new(rb_tainted_str_new(*env, s-*env),
rb_tainted_str_new2(s+1)));
}
env++;
}
FREE_ENVIRON(environ);
return Qnil;
}
static VALUE
env_reject_bang()
{
volatile VALUE keys;
VALUE *ptr;
int len, del = 0;
rb_secure(4);
keys = env_keys();
ptr = RARRAY(keys)->ptr;
len = RARRAY(keys)->len;
while (len--) {
VALUE val = rb_f_getenv(Qnil, *ptr);
if (!NIL_P(val)) {
if (RTEST(rb_yield(rb_assoc_new(*ptr, val)))) {
env_delete(Qnil, *ptr);
del++;
}
}
ptr++;
}
if (del == 0) return Qnil;
return envtbl;
}
static VALUE
env_delete_if()
{
env_reject_bang();
return envtbl;
}
static VALUE
env_select(argc, argv)
int argc;
VALUE *argv;
{
VALUE result = rb_ary_new();
long i;
if (rb_block_given_p()) {
char **env;
if (argc > 0) {
rb_raise(rb_eArgError, "wrong number arguments(%d for 0)", argc);
}
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
VALUE assoc = rb_assoc_new(rb_tainted_str_new(*env, s-*env),
rb_tainted_str_new2(s+1));
if (RTEST(rb_yield(assoc))) {
rb_ary_push(result, assoc);
}
}
env++;
}
FREE_ENVIRON(environ);
}
else {
for (i=0; i<argc; i++) {
rb_ary_push(result, rb_f_getenv(Qnil, argv[i]));
}
}
return result;
}
static VALUE
env_to_s()
{
return rb_str_new2("ENV");
}
static VALUE
env_inspect()
{
char **env;
VALUE str = rb_str_buf_new2("{");
VALUE i;
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (env != environ) {
rb_str_buf_cat2(str, ", ");
}
if (s) {
rb_str_buf_cat2(str, "\"");
rb_str_buf_cat(str, *env, s-*env);
rb_str_buf_cat2(str, "\"=>");
i = rb_inspect(rb_str_new2(s+1));
rb_str_buf_append(str, i);
}
env++;
}
FREE_ENVIRON(environ);
rb_str_buf_cat2(str, "}");
OBJ_TAINT(str);
return str;
}
static VALUE
env_to_a()
{
char **env;
VALUE ary = rb_ary_new();
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_ary_push(ary, rb_assoc_new(rb_tainted_str_new(*env, s-*env),
rb_tainted_str_new2(s+1)));
}
env++;
}
FREE_ENVIRON(environ);
return ary;
}
static VALUE
env_none()
{
return Qnil;
}
static VALUE
env_size()
{
int i;
char **env;
env = GET_ENVIRON(environ);
for(i=0; env[i]; i++)
;
FREE_ENVIRON(environ);
return INT2FIX(i);
}
static VALUE
env_empty_p()
{
char **env;
env = GET_ENVIRON(environ);
if (env[0] == 0) {
FREE_ENVIRON(environ);
return Qtrue;
}
FREE_ENVIRON(environ);
return Qfalse;
}
static VALUE
env_has_key(env, key)
VALUE env, key;
{
char *s;
s = StringValuePtr(key);
if (strlen(s) != RSTRING(key)->len)
rb_raise(rb_eArgError, "bad environment variable name");
if (getenv(s)) return Qtrue;
return Qfalse;
}
static VALUE
env_has_value(dmy, value)
VALUE dmy, value;
{
char **env;
if (TYPE(value) != T_STRING) return Qfalse;
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=')+1;
if (s) {
if (strncmp(s, RSTRING(value)->ptr, strlen(s)) == 0) {
FREE_ENVIRON(environ);
return Qtrue;
}
}
env++;
}
FREE_ENVIRON(environ);
return Qfalse;
}
static VALUE
env_index(dmy, value)
VALUE dmy, value;
{
char **env;
VALUE str;
if (TYPE(value) != T_STRING) return Qnil;
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=')+1;
if (s) {
if (strncmp(s, RSTRING(value)->ptr, strlen(s)) == 0) {
str = rb_tainted_str_new(*env, s-*env-1);
FREE_ENVIRON(environ);
return str;
}
}
env++;
}
FREE_ENVIRON(environ);
return Qnil;
}
static VALUE
env_indexes(argc, argv)
int argc;
VALUE *argv;
{
int i;
VALUE indexes = rb_ary_new2(argc);
rb_warn("ENV.%s is deprecated; use ENV.select",
rb_id2name(rb_frame_last_func()));
for (i=0;i<argc;i++) {
char *v = 0;
if (TYPE(argv[i]) == T_STRING) {
v = getenv(RSTRING(argv[i])->ptr);
}
if (v) {
RARRAY(indexes)->ptr[i] = rb_tainted_str_new2(v);
}
else {
RARRAY(indexes)->ptr[i] = Qnil;
}
RARRAY(indexes)->len = i+1;
}
return indexes;
}
static VALUE
env_to_hash()
{
char **env;
VALUE hash = rb_hash_new();
env = GET_ENVIRON(environ);
while (*env) {
char *s = strchr(*env, '=');
if (s) {
rb_hash_aset(hash, rb_tainted_str_new(*env, s-*env),
rb_tainted_str_new2(s+1));
}
env++;
}
FREE_ENVIRON(environ);
return hash;
}
static VALUE
env_reject()
{
return rb_hash_delete_if(env_to_hash());
}
void
Init_Hash()
{
id_hash = rb_intern("hash");
id_yield = rb_intern("yield");
id_default = rb_intern("default");
rb_cHash = rb_define_class("Hash", rb_cObject);
rb_include_module(rb_cHash, rb_mEnumerable);
rb_define_singleton_method(rb_cHash, "allocate", rb_hash_s_alloc, 0);
rb_define_singleton_method(rb_cHash, "[]", rb_hash_s_create, -1);
rb_define_method(rb_cHash,"initialize", rb_hash_initialize, -1);
rb_define_method(rb_cHash,"clone", rb_hash_clone, 0);
rb_define_method(rb_cHash,"rehash", rb_hash_rehash, 0);
rb_define_method(rb_cHash,"to_hash", rb_hash_to_hash, 0);
rb_define_method(rb_cHash,"to_a", rb_hash_to_a, 0);
rb_define_method(rb_cHash,"to_s", rb_hash_to_s, 0);
rb_define_method(rb_cHash,"inspect", rb_hash_inspect, 0);
rb_define_method(rb_cHash,"==", rb_hash_equal, 1);
rb_define_method(rb_cHash,"[]", rb_hash_aref, 1);
rb_define_method(rb_cHash,"fetch", rb_hash_fetch, -1);
rb_define_method(rb_cHash,"[]=", rb_hash_aset, 2);
rb_define_method(rb_cHash,"store", rb_hash_aset, 2);
rb_define_method(rb_cHash,"default", rb_hash_default, -1);
rb_define_method(rb_cHash,"default=", rb_hash_set_default, 1);
rb_define_method(rb_cHash,"index", rb_hash_index, 1);
rb_define_method(rb_cHash,"indexes", rb_hash_indexes, -1);
rb_define_method(rb_cHash,"indices", rb_hash_indexes, -1);
rb_define_method(rb_cHash,"size", rb_hash_size, 0);
rb_define_method(rb_cHash,"length", rb_hash_size, 0);
rb_define_method(rb_cHash,"empty?", rb_hash_empty_p, 0);
rb_define_method(rb_cHash,"each", rb_hash_each_pair, 0);
rb_define_method(rb_cHash,"each_value", rb_hash_each_value, 0);
rb_define_method(rb_cHash,"each_key", rb_hash_each_key, 0);
rb_define_method(rb_cHash,"each_pair", rb_hash_each_pair, 0);
rb_define_method(rb_cHash,"sort", rb_hash_sort, 0);
rb_define_method(rb_cHash,"keys", rb_hash_keys, 0);
rb_define_method(rb_cHash,"values", rb_hash_values, 0);
rb_define_method(rb_cHash,"shift", rb_hash_shift, 0);
rb_define_method(rb_cHash,"delete", rb_hash_delete, 1);
rb_define_method(rb_cHash,"delete_if", rb_hash_delete_if, 0);
rb_define_method(rb_cHash,"select", rb_hash_select, -1);
rb_define_method(rb_cHash,"reject", rb_hash_reject, 0);
rb_define_method(rb_cHash,"reject!", rb_hash_reject_bang, 0);
rb_define_method(rb_cHash,"clear", rb_hash_clear, 0);
rb_define_method(rb_cHash,"invert", rb_hash_invert, 0);
rb_define_method(rb_cHash,"update", rb_hash_update, 1);
rb_define_method(rb_cHash,"replace", rb_hash_replace, 1);
rb_define_method(rb_cHash,"include?", rb_hash_has_key, 1);
rb_define_method(rb_cHash,"member?", rb_hash_has_key, 1);
rb_define_method(rb_cHash,"has_key?", rb_hash_has_key, 1);
rb_define_method(rb_cHash,"has_value?", rb_hash_has_value, 1);
rb_define_method(rb_cHash,"key?", rb_hash_has_key, 1);
rb_define_method(rb_cHash,"value?", rb_hash_has_value, 1);
#ifndef __MACOS__ /* environment variables nothing on MacOS. */
origenviron = environ;
envtbl = rb_obj_alloc(rb_cObject);
rb_extend_object(envtbl, rb_mEnumerable);
rb_define_singleton_method(envtbl,"[]", rb_f_getenv, 1);
rb_define_singleton_method(envtbl,"fetch", env_fetch, -1);
rb_define_singleton_method(envtbl,"[]=", env_aset, 2);
rb_define_singleton_method(envtbl,"store", env_aset, 2);
rb_define_singleton_method(envtbl,"each", env_each, 0);
rb_define_singleton_method(envtbl,"each_pair", env_each, 0);
rb_define_singleton_method(envtbl,"each_key", env_each_key, 0);
rb_define_singleton_method(envtbl,"each_value", env_each_value, 0);
rb_define_singleton_method(envtbl,"delete", env_delete_m, 1);
rb_define_singleton_method(envtbl,"delete_if", env_delete_if, 0);
rb_define_singleton_method(envtbl,"reject", env_reject, 0);
rb_define_singleton_method(envtbl,"reject!", env_reject_bang, 0);
rb_define_singleton_method(envtbl,"select", env_select, -1);
rb_define_singleton_method(envtbl,"to_s", env_to_s, 0);
rb_define_singleton_method(envtbl,"inspect", env_inspect, 0);
rb_define_singleton_method(envtbl,"rehash", env_none, 0);
rb_define_singleton_method(envtbl,"to_a", env_to_a, 0);
rb_define_singleton_method(envtbl,"index", env_index, 1);
rb_define_singleton_method(envtbl,"indexes", env_indexes, -1);
rb_define_singleton_method(envtbl,"indices", env_indexes, -1);
rb_define_singleton_method(envtbl,"size", env_size, 0);
rb_define_singleton_method(envtbl,"length", env_size, 0);
rb_define_singleton_method(envtbl,"empty?", env_empty_p, 0);
rb_define_singleton_method(envtbl,"keys", env_keys, 0);
rb_define_singleton_method(envtbl,"values", env_values, 0);
rb_define_singleton_method(envtbl,"include?", env_has_key, 1);
rb_define_singleton_method(envtbl,"member?", env_has_key, 1);
rb_define_singleton_method(envtbl,"has_key?", env_has_key, 1);
rb_define_singleton_method(envtbl,"has_value?", env_has_value, 1);
rb_define_singleton_method(envtbl,"key?", env_has_key, 1);
rb_define_singleton_method(envtbl,"value?", env_has_value, 1);
rb_define_singleton_method(envtbl,"to_hash", env_to_hash, 0);
rb_define_global_const("ENV", envtbl);
#else /* __MACOS__ */
envtbl = rb_hash_s_new(0, NULL, rb_cHash);
rb_define_global_const("ENV", envtbl);
#endif /* ifndef __MACOS__ environment variables nothing on MacOS. */
}
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