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/*
** env.c - ENV is a Hash-like accessor for environment variables.
**
*/
#include "mruby.h"
#include "mruby/hash.h"
#include "mruby/khash.h"
#include "mruby/class.h"
#include "mruby/array.h"
#include "mruby/string.h"
#include "mruby/variable.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef _WIN32
int
unsetenv(const char* name)
{
int r;
char* p = malloc(strlen(name) + 2);
if (!p) return -1;
strcpy(p, name);
strcat(p, "=");
r = _putenv(p);
free(p);
return r;
}
int
setenv(const char* name, const char* value, int overwrite)
{
int r;
char* p = malloc(strlen(name) + strlen(value) + 2);
if (!p) return -1;
strcpy(p, name);
strcat(p, "=");
strcat(p, value);
r = _putenv(p);
free(p);
return r;
}
#define environ _environ
#else
extern char **environ;
#endif
mrb_value
mrb_env_aget(mrb_state *mrb, mrb_value self)
{
mrb_value key;
const char *cname, *cvalue;
mrb_get_args(mrb, "S", &key);
cname = mrb_string_value_cstr(mrb, &key);
cvalue = getenv(cname);
if (cvalue != NULL) {
return mrb_str_new_cstr(mrb, cvalue);
} else {
return mrb_nil_value();
}
}
mrb_value
mrb_env_has_key(mrb_state *mrb, mrb_value self)
{
mrb_value name;
const char *key;
mrb_get_args(mrb, "S", &name);
key = mrb_str_to_cstr(mrb, name);
if (getenv(key) != NULL) {
return mrb_true_value();
} else {
return mrb_false_value();
}
}
mrb_value
mrb_env_keys(mrb_state *mrb, mrb_value self)
{
int i;
mrb_value ary;
ary = mrb_ary_new(mrb);
for (i = 0; environ[i] != NULL; i++) {
char *str = strchr(environ[i], '=');
if (str != NULL) {
int len = str - environ[i];
mrb_ary_push(mrb, ary, mrb_str_new(mrb, environ[i], len));
}
}
return ary;
}
mrb_value
mrb_env_values(mrb_state *mrb, mrb_value self)
{
int i;
mrb_value ary;
ary = mrb_ary_new(mrb);
for (i = 0; environ[i] != NULL; i++) {
char *str = strchr(environ[i], '=');
if (str) {
int len;
str++;
len = strlen(str);
mrb_ary_push(mrb, ary, mrb_str_new(mrb, str, len));
}
}
return ary;
}
static mrb_value
mrb_env_size(mrb_state *mrb, mrb_value self)
{
int i;
for (i = 0; environ[i] != NULL; i++)
;
return mrb_fixnum_value(i);
}
static mrb_value
mrb_env_to_hash(mrb_state *mrb, mrb_value self)
{
int i;
mrb_value hash;
hash = mrb_hash_new(mrb);
for (i = 0; environ[i] != NULL; i++) {
char *str = strchr(environ[i], '=');
if (str != NULL) {
mrb_value val;
int ai = mrb_gc_arena_save(mrb);
int len = str - environ[i];
mrb_value key = mrb_str_new(mrb, environ[i], len);
str++;
val = mrb_str_new(mrb, str, strlen(str));
mrb_hash_set(mrb, hash, key, val);
mrb_gc_arena_restore(mrb, ai);
}
}
return hash;
}
static mrb_value
mrb_env_to_a(mrb_state *mrb, mrb_value self)
{
int i;
mrb_value ary;
ary = mrb_ary_new(mrb);
for (i = 0; environ[i] != NULL; i++) {
char *str = strchr(environ[i], '=');
if (str != NULL) {
int ai = mrb_gc_arena_save(mrb);
mrb_value elem = mrb_ary_new(mrb);
int len = str - environ[i];
mrb_ary_push(mrb, elem, mrb_str_new(mrb, environ[i], len));
str++;
mrb_ary_push(mrb, elem, mrb_str_new(mrb, str, strlen(str)));
mrb_ary_push(mrb, ary, elem);
mrb_gc_arena_restore(mrb, ai);
}
}
return ary;
}
static mrb_value
mrb_env_inspect(mrb_state *mrb, mrb_value self)
{
mrb_value hash = mrb_env_to_hash(mrb, self);
return mrb_funcall(mrb, hash, "inspect", 0);
}
static mrb_value
mrb_env_to_s(mrb_state *mrb, mrb_value self)
{
return mrb_str_new_cstr(mrb, "ENV");
}
static mrb_value
mrb_env_aset(mrb_state *mrb, mrb_value self)
{
mrb_value name, value;
const char *cname, *cvalue;
mrb_get_args(mrb, "So", &name, &value);
cname = mrb_string_value_cstr(mrb, &name);
if (mrb_nil_p(value)) {
if (unsetenv(cname) != 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "can't delete environment variable");
}
} else {
mrb_convert_type(mrb, value, MRB_TT_STRING, "String", "to_str");
cvalue = mrb_string_value_cstr(mrb, &value);
if (setenv(cname, cvalue, 1) != 0) {
mrb_raise(mrb, E_RUNTIME_ERROR, "can't change environment variable");
}
}
return value;
}
void
mrb_mruby_env_gem_init(mrb_state *mrb)
{
struct RObject *e;
e = (struct RObject*) mrb_obj_alloc(mrb, MRB_TT_OBJECT, mrb->object_class);
#if defined(MRUBY_RELEASE_NO) && MRUBY_RELEASE_NO >= 10000
mrb_include_module(mrb, (struct RClass*)e, mrb_module_get(mrb, "Enumerable"));
#else
mrb_include_module(mrb, (struct RClass*)e, mrb_class_get(mrb, "Enumerable"));
#endif
mrb_define_singleton_method(mrb, e,"[]", mrb_env_aget, MRB_ARGS_REQ(1));
mrb_define_singleton_method(mrb, e,"[]=", mrb_env_aset, MRB_ARGS_REQ(2));
mrb_define_singleton_method(mrb, e,"has_key?", mrb_env_has_key, MRB_ARGS_REQ(1));
mrb_define_singleton_method(mrb, e,"inspect", mrb_env_inspect, MRB_ARGS_NONE());
mrb_define_singleton_method(mrb, e,"keys", mrb_env_keys, MRB_ARGS_NONE());
mrb_define_singleton_method(mrb, e,"size", mrb_env_size, MRB_ARGS_NONE());
mrb_define_singleton_method(mrb, e,"store", mrb_env_aset, MRB_ARGS_REQ(2));
mrb_define_singleton_method(mrb, e,"to_a", mrb_env_to_a, MRB_ARGS_NONE());
mrb_define_singleton_method(mrb, e,"to_hash", mrb_env_to_hash, MRB_ARGS_NONE());
mrb_define_singleton_method(mrb, e,"to_s", mrb_env_to_s, MRB_ARGS_NONE());
mrb_define_singleton_method(mrb, e,"values", mrb_env_values, MRB_ARGS_NONE());
mrb_define_global_const(mrb, "ENV", mrb_obj_value(e));
}
void
mrb_mruby_env_gem_final(mrb_state *mrb)
{
}
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