void fields_chunk::step_source(field_type ft, bool including_integrated) {
if (doing_solve_cw && !including_integrated) return;
for (src_vol *sv = sources[ft]; sv; sv = sv->next) {
component c = direction_component(first_field_component(ft),
component_direction(sv->c));
const realnum *cndinv = s->condinv[c][component_direction(sv->c)];
if ((including_integrated || !sv->t->is_integrated) && f[c][0]
&& ((ft == D_stuff && is_electric(sv->c))
|| (ft == B_stuff && is_magnetic(sv->c)))) {
if (cndinv)
for (int j=0; j<sv->npts; j++) {
const int i = sv->index[j];
const complex<double> A = sv->current(j) * dt * double(cndinv[i]);
f[c][0][i] -= real(A);
if (!is_real) f[c][1][i] -= imag(A);
}
else
for (int j=0; j<sv->npts; j++) {
const complex<double> A = sv->current(j) * dt;
const int i = sv->index[j];
f[c][0][i] -= real(A);
if (!is_real) f[c][1][i] -= imag(A);
}
}
}
}
bool env_exist(const wchar_t *key, env_mode_flags_t mode) {
CHECK(key, false);
const bool has_scope = mode & (ENV_LOCAL | ENV_GLOBAL | ENV_UNIVERSAL);
const bool test_local = !has_scope || (mode & ENV_LOCAL);
const bool test_global = !has_scope || (mode & ENV_GLOBAL);
const bool test_universal = !has_scope || (mode & ENV_UNIVERSAL);
const bool test_exported = (mode & ENV_EXPORT) || !(mode & ENV_UNEXPORT);
const bool test_unexported = (mode & ENV_UNEXPORT) || !(mode & ENV_EXPORT);
if (is_electric(key)) {
// Electric variables all exist, and they are all global. A local or universal version can
// not exist. They are also never exported.
if (test_global && test_unexported) {
return true;
}
return false;
}
if (test_local || test_global) {
const env_node_t *env = test_local ? top : global_env;
while (env != NULL) {
if (env == global_env && !test_global) {
break;
}
var_table_t::const_iterator result = env->env.find(key);
if (result != env->env.end()) {
const var_entry_t &res = result->second;
return res.exportv ? test_exported : test_unexported;
}
env = env->next_scope_to_search();
}
}
if (test_universal) {
if (!get_proc_had_barrier()) {
set_proc_had_barrier(true);
env_universal_barrier();
}
if (uvars() && !uvars()->get(key).missing()) {
return uvars()->get_export(key) ? test_exported : test_unexported;
}
}
return 0;
}
env_var_t env_get_string(const wcstring &key, env_mode_flags_t mode)
{
const bool has_scope = mode & (ENV_LOCAL | ENV_GLOBAL | ENV_UNIVERSAL);
const bool search_local = !has_scope || (mode & ENV_LOCAL);
const bool search_global = !has_scope || (mode & ENV_GLOBAL);
const bool search_universal = !has_scope || (mode & ENV_UNIVERSAL);
const bool search_exported = (mode & ENV_EXPORT) || !(mode & ENV_UNEXPORT);
const bool search_unexported = (mode & ENV_UNEXPORT) || !(mode & ENV_EXPORT);
/* Make the assumption that electric keys can't be shadowed elsewhere, since we currently block that in env_set() */
if (is_electric(key))
{
if (!search_global) return env_var_t::missing_var();
/* Big hack...we only allow getting the history on the main thread. Note that history_t may ask for an environment variable, so don't take the lock here (we don't need it) */
if (key == L"history" && is_main_thread())
{
env_var_t result;
history_t *history = reader_get_history();
if (! history)
{
history = &history_t::history_with_name(L"fish");
}
if (history)
history->get_string_representation(&result, ARRAY_SEP_STR);
return result;
}
else if (key == L"COLUMNS")
{
return to_string(common_get_width());
}
else if (key == L"LINES")
{
return to_string(common_get_height());
}
else if (key == L"status")
{
return to_string(proc_get_last_status());
}
else if (key == L"umask")
{
return format_string(L"0%0.3o", get_umask());
}
// we should never get here unless the electric var list is out of sync
}
if (search_local || search_global) {
/* Lock around a local region */
scoped_lock lock(env_lock);
env_node_t *env = search_local ? top : global_env;
while (env != NULL)
{
const var_entry_t *entry = env->find_entry(key);
if (entry != NULL && (entry->exportv ? search_exported : search_unexported))
{
if (entry->val == ENV_NULL)
{
return env_var_t::missing_var();
}
else
{
return entry->val;
}
}
if (has_scope)
{
if (!search_global || env == global_env) break;
env = global_env;
}
else
{
env = env->next_scope_to_search();
}
}
}
if (!search_universal) return env_var_t::missing_var();
/* Another big hack - only do a universal barrier on the main thread (since it can change variable values)
Make sure we do this outside the env_lock because it may itself call env_get_string */
if (is_main_thread() && ! get_proc_had_barrier())
{
set_proc_had_barrier(true);
env_universal_barrier();
}
if (uvars())
{
env_var_t env_var = uvars()->get(key);
if (env_var == ENV_NULL || !(uvars()->get_export(key) ? search_exported : search_unexported))
{
env_var = env_var_t::missing_var();
}
return env_var;
}
return env_var_t::missing_var();
}
int env_set(const wcstring &key, const wchar_t *val, env_mode_flags_t var_mode)
{
ASSERT_IS_MAIN_THREAD();
bool has_changed_old = has_changed_exported;
bool has_changed_new = false;
int done=0;
if (val && contains(key, L"PWD", L"HOME"))
{
/* Canoncalize our path; if it changes, recurse and try again. */
wcstring val_canonical = val;
path_make_canonical(val_canonical);
if (val != val_canonical)
{
return env_set(key, val_canonical.c_str(), var_mode);
}
}
if ((var_mode & (ENV_LOCAL | ENV_UNIVERSAL)) && (is_read_only(key) || is_electric(key)))
{
return ENV_SCOPE;
}
if ((var_mode & ENV_EXPORT) && is_electric(key))
{
return ENV_SCOPE;
}
if ((var_mode & ENV_USER) && is_read_only(key))
{
return ENV_PERM;
}
if (key == L"umask")
{
wchar_t *end;
/*
Set the new umask
*/
if (val && wcslen(val))
{
errno=0;
long mask = wcstol(val, &end, 8);
if (!errno && (!*end) && (mask <= 0777) && (mask >= 0))
{
umask(mask);
/* Do not actually create a umask variable, on env_get, it will be calculated dynamically */
return 0;
}
}
return ENV_INVALID;
}
/*
Zero element arrays are internaly not coded as null but as this
placeholder string
*/
if (!val)
{
val = ENV_NULL;
}
if (var_mode & ENV_UNIVERSAL)
{
const bool old_export = uvars() && uvars()->get_export(key);
bool new_export;
if (var_mode & ENV_EXPORT)
{
// export
new_export = true;
}
else if (var_mode & ENV_UNEXPORT)
{
// unexport
new_export = false;
}
else
{
// not changing the export
new_export = old_export;
}
if (uvars())
{
uvars()->set(key, val, new_export);
env_universal_barrier();
if (old_export || new_export)
{
mark_changed_exported();
}
}
}
else
{
// Determine the node
env_node_t *preexisting_node = env_get_node(key);
bool preexisting_entry_exportv = false;
if (preexisting_node != NULL)
{
var_table_t::const_iterator result = preexisting_node->env.find(key);
assert(result != preexisting_node->env.end());
const var_entry_t &entry = result->second;
if (entry.exportv)
{
preexisting_entry_exportv = true;
has_changed_new = true;
}
}
env_node_t *node = NULL;
if (var_mode & ENV_GLOBAL)
{
node = global_env;
}
else if (var_mode & ENV_LOCAL)
{
node = top;
}
else if (preexisting_node != NULL)
{
node = preexisting_node;
if ((var_mode & (ENV_EXPORT | ENV_UNEXPORT)) == 0)
{
// use existing entry's exportv
var_mode = preexisting_entry_exportv ? ENV_EXPORT : 0;
}
}
else
{
if (! get_proc_had_barrier())
{
set_proc_had_barrier(true);
env_universal_barrier();
}
if (uvars() && ! uvars()->get(key).missing())
{
bool exportv;
if (var_mode & ENV_EXPORT)
{
exportv = true;
}
else if (var_mode & ENV_UNEXPORT)
{
exportv = false;
}
else
{
exportv = uvars()->get_export(key);
}
uvars()->set(key, val, exportv);
env_universal_barrier();
done = 1;
}
else
{
/*
New variable with unspecified scope. The default
scope is the innermost scope that is shadowing,
which will be either the current function or the
global scope.
*/
node = top;
while (node->next && !node->new_scope)
{
node = node->next;
}
}
}
if (!done)
{
// Set the entry in the node
// Note that operator[] accesses the existing entry, or creates a new one
var_entry_t &entry = node->env[key];
if (entry.exportv)
{
// this variable already existed, and was exported
has_changed_new = true;
}
entry.val = val;
if (var_mode & ENV_EXPORT)
{
// the new variable is exported
entry.exportv = true;
node->exportv = true;
has_changed_new = true;
}
else
{
entry.exportv = false;
}
if (has_changed_old || has_changed_new)
mark_changed_exported();
}
}
event_t ev = event_t::variable_event(key);
ev.arguments.reserve(3);
ev.arguments.push_back(L"VARIABLE");
ev.arguments.push_back(L"SET");
ev.arguments.push_back(key);
// debug( 1, L"env_set: fire events on variable %ls", key );
event_fire(&ev);
// debug( 1, L"env_set: return from event firing" );
react_to_variable_change(key);
return 0;
}
void env_init(const struct config_paths_t *paths /* or NULL */)
{
/*
env_read_only variables can not be altered directly by the user
*/
const wchar_t * const ro_keys[] =
{
L"status",
L"history",
L"version",
L"_",
L"LINES",
L"COLUMNS",
L"PWD",
//L"SHLVL", // will be inserted a bit lower down
L"FISH_VERSION",
};
for (size_t i=0; i < sizeof ro_keys / sizeof *ro_keys; i++)
{
env_read_only.insert(ro_keys[i]);
}
/*
Names of all dynamically calculated variables
*/
env_electric.insert(L"history");
env_electric.insert(L"status");
env_electric.insert(L"umask");
env_electric.insert(L"COLUMNS");
env_electric.insert(L"LINES");
top = new env_node_t;
global_env = top;
global = &top->env;
/*
Now the environemnt variable handling is set up, the next step
is to insert valid data
*/
/*
Import environment variables
*/
for (char **p = (environ ? environ : __environ); p && *p; p++)
{
const wcstring key_and_val = str2wcstring(*p); //like foo=bar
size_t eql = key_and_val.find(L'=');
if (eql == wcstring::npos)
{
// no equals found
if (is_read_only(key_and_val) || is_electric(key_and_val)) continue;
env_set(key_and_val, L"", ENV_EXPORT | ENV_GLOBAL);
}
else
{
wcstring key = key_and_val.substr(0, eql);
if (is_read_only(key) || is_electric(key)) continue;
wcstring val = key_and_val.substr(eql + 1);
if (variable_is_colon_delimited_array(key))
{
std::replace(val.begin(), val.end(), L':', ARRAY_SEP);
}
env_set(key, val.c_str(), ENV_EXPORT | ENV_GLOBAL);
}
}
/* Set the given paths in the environment, if we have any */
if (paths != NULL)
{
env_set(FISH_DATADIR_VAR, paths->data.c_str(), ENV_GLOBAL);
env_set(FISH_SYSCONFDIR_VAR, paths->sysconf.c_str(), ENV_GLOBAL);
env_set(FISH_HELPDIR_VAR, paths->doc.c_str(), ENV_GLOBAL);
env_set(FISH_BIN_DIR, paths->bin.c_str(), ENV_GLOBAL);
}
/*
Set up the PATH variable
*/
setup_path();
/*
Set up the USER variable
*/
if (env_get_string(L"USER").missing_or_empty())
{
const struct passwd *pw = getpwuid(getuid());
if (pw && pw->pw_name)
{
const wcstring uname = str2wcstring(pw->pw_name);
env_set(L"USER", uname.c_str(), ENV_GLOBAL | ENV_EXPORT);
}
}
/*
Set up the version variables
*/
wcstring version = str2wcstring(get_fish_version());
env_set(L"version", version.c_str(), ENV_GLOBAL);
env_set(L"FISH_VERSION", version.c_str(), ENV_GLOBAL);
/*
Set up SHLVL variable
*/
const env_var_t shlvl_str = env_get_string(L"SHLVL");
wcstring nshlvl_str = L"1";
if (! shlvl_str.missing())
{
wchar_t *end;
long shlvl_i = wcstol(shlvl_str.c_str(), &end, 10);
while (iswspace(*end)) ++end; /* skip trailing whitespace */
if (shlvl_i >= 0 && *end == '\0')
{
nshlvl_str = to_string<long>(shlvl_i + 1);
}
}
env_set(L"SHLVL", nshlvl_str.c_str(), ENV_GLOBAL | ENV_EXPORT);
env_read_only.insert(L"SHLVL");
/* Set up the HOME variable */
if (env_get_string(L"HOME").missing_or_empty())
{
const env_var_t unam = env_get_string(L"USER");
char *unam_narrow = wcs2str(unam.c_str());
struct passwd *pw = getpwnam(unam_narrow);
if (pw->pw_dir != NULL)
{
const wcstring dir = str2wcstring(pw->pw_dir);
env_set(L"HOME", dir.c_str(), ENV_GLOBAL | ENV_EXPORT);
}
free(unam_narrow);
}
/* Set PWD */
env_set_pwd();
/* Set up universal variables. The empty string means to use the deafult path. */
assert(s_universal_variables == NULL);
s_universal_variables = new env_universal_t(L"");
s_universal_variables->load();
/* Set g_log_forks */
env_var_t log_forks = env_get_string(L"fish_log_forks");
g_log_forks = ! log_forks.missing_or_empty() && from_string<bool>(log_forks);
/* Set g_use_posix_spawn. Default to true. */
env_var_t use_posix_spawn = env_get_string(L"fish_use_posix_spawn");
g_use_posix_spawn = (use_posix_spawn.missing_or_empty() ? true : from_string<bool>(use_posix_spawn));
/* Set fish_bind_mode to "default" */
env_set(FISH_BIND_MODE_VAR, DEFAULT_BIND_MODE, ENV_GLOBAL);
/*
Now that the global scope is fully initialized, add a toplevel local
scope. This same local scope will persist throughout the lifetime of the
fish process, and it will ensure that `set -l` commands run at the
command-line don't affect the global scope.
*/
env_push(false);
}
bool env_exist(const wchar_t *key, int mode)
{
env_node_t *env;
const wchar_t *item = NULL;
CHECK(key, false);
/*
Read only variables all exist, and they are all global. A local
version can not exist.
*/
if (!(mode & ENV_LOCAL) && !(mode & ENV_UNIVERSAL))
{
if (is_read_only(key) || is_electric(key))
{
//Such variables are never exported
if (mode & ENV_EXPORT)
{
return false;
}
else if (mode & ENV_UNEXPORT)
{
return true;
}
return true;
}
}
if (!(mode & ENV_UNIVERSAL))
{
env = (mode & ENV_GLOBAL)?global_env:top;
while (env != 0)
{
var_table_t::iterator result = env->env.find(key);
if (result != env->env.end())
{
const var_entry_t &res = result->second;
if (mode & ENV_EXPORT)
{
return res.exportv;
}
else if (mode & ENV_UNEXPORT)
{
return ! res.exportv;
}
return true;
}
if (mode & ENV_LOCAL)
break;
env = env->next_scope_to_search();
}
}
if (!(mode & ENV_LOCAL) && !(mode & ENV_GLOBAL))
{
if (! get_proc_had_barrier())
{
set_proc_had_barrier(true);
env_universal_barrier();
}
item = env_universal_get(key);
if (item != NULL)
{
if (mode & ENV_EXPORT)
{
return env_universal_get_export(key) == 1;
}
else if (mode & ENV_UNEXPORT)
{
return env_universal_get_export(key) == 0;
}
return 1;
}
}
return 0;
}
