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#include <mruby.h>
#include <mruby/class.h>
#include <mruby/compile.h>
#include <mruby/irep.h>
#include <mruby/proc.h>
#include <mruby/opcode.h>
#include <mruby/error.h>
#include <mruby/presym.h>
#include <mruby/variable.h>
struct REnv *mrb_env_new(mrb_state *mrb, struct mrb_context *c, mrb_callinfo *ci, int nstacks, mrb_value *stack, struct RClass *tc);
mrb_value mrb_exec_irep(mrb_state *mrb, mrb_value self, struct RProc *p);
mrb_value mrb_obj_instance_eval(mrb_state *mrb, mrb_value self);
mrb_value mrb_mod_module_eval(mrb_state*, mrb_value);
void mrb_codedump_all(mrb_state*, struct RProc*);
static struct RProc*
create_proc_from_string(mrb_state *mrb, const char *s, mrb_int len, mrb_value binding, const char *file, mrb_int line)
{
mrbc_context *cxt;
struct mrb_parser_state *p;
struct RProc *proc;
const struct RProc *scope;
struct REnv *e;
mrb_callinfo *ci; /* callinfo of eval caller */
struct RClass *target_class = NULL;
struct mrb_context *c = mrb->c;
if (!mrb_nil_p(binding)) {
mrb_value scope_obj;
if (!mrb_class_defined_id(mrb, MRB_SYM(Binding))
|| !mrb_obj_is_kind_of(mrb, binding, mrb_class_get_id(mrb, MRB_SYM(Binding)))) {
mrb_raisef(mrb, E_TYPE_ERROR, "wrong argument type %C (expected binding)",
mrb_obj_class(mrb, binding));
}
scope_obj = mrb_iv_get(mrb, binding, MRB_SYM(proc));
mrb_assert(mrb_proc_p(scope_obj));
scope = mrb_proc_ptr(scope_obj);
if (MRB_PROC_CFUNC_P(scope)) {
e = NULL;
}
else {
mrb_value env = mrb_iv_get(mrb, binding, MRB_SYM(env));
mrb_assert(mrb_env_p(env));
e = (struct REnv *)mrb_obj_ptr(env);
mrb_assert(e != NULL);
}
}
else {
ci = (c->ci > c->cibase) ? c->ci - 1 : c->cibase;
scope = ci->proc;
e = NULL;
}
if (file) {
if (strlen(file) >= UINT16_MAX) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "filename too long");
}
}
else {
file = "(eval)";
}
cxt = mrbc_context_new(mrb);
cxt->lineno = (uint16_t)line;
mrbc_filename(mrb, cxt, file);
cxt->capture_errors = TRUE;
cxt->no_optimize = TRUE;
cxt->upper = scope && MRB_PROC_CFUNC_P(scope) ? NULL : scope;
p = mrb_parse_nstring(mrb, s, len, cxt);
/* only occur when memory ran out */
if (!p) {
mrbc_context_free(mrb, cxt);
mrb_raise(mrb, E_RUNTIME_ERROR, "Failed to create parser state (out of memory)");
}
if (0 < p->nerr) {
/* parse error */
mrb_value str;
mrbc_context_free(mrb, cxt);
if (!p->error_buffer[0].message) {
mrb_parser_free(p);
mrb_raise(mrb, E_SYNTAX_ERROR, "compile error");
}
if (file) {
str = mrb_format(mrb, "file %s line %d: %s",
file,
p->error_buffer[0].lineno,
p->error_buffer[0].message);
}
else {
str = mrb_format(mrb, "line %d: %s",
p->error_buffer[0].lineno,
p->error_buffer[0].message);
}
mrb_parser_free(p);
mrb_exc_raise(mrb, mrb_exc_new_str(mrb, E_SYNTAX_ERROR, str));
}
proc = mrb_generate_code(mrb, p);
if (proc == NULL) {
/* codegen error */
mrb_parser_free(p);
mrbc_context_free(mrb, cxt);
mrb_raise(mrb, E_SCRIPT_ERROR, "codegen error");
}
if (c->ci > c->cibase) {
ci = &c->ci[-1];
}
else {
ci = c->cibase;
}
if (scope) {
target_class = MRB_PROC_TARGET_CLASS(scope);
if (!MRB_PROC_CFUNC_P(scope)) {
if (e == NULL) {
/* when `binding` is nil */
e = mrb_vm_ci_env(ci);
if (e == NULL) {
e = mrb_env_new(mrb, c, ci, ci->proc->body.irep->nlocals, ci->stack, target_class);
ci->u.env = e;
}
}
proc->e.env = e;
proc->flags |= MRB_PROC_ENVSET;
mrb_field_write_barrier(mrb, (struct RBasic*)proc, (struct RBasic*)e);
}
}
proc->upper = scope;
mrb_vm_ci_target_class_set(mrb->c->ci, target_class);
/* mrb_codedump_all(mrb, proc); */
mrb_parser_free(p);
mrbc_context_free(mrb, cxt);
return proc;
}
static mrb_value
exec_irep(mrb_state *mrb, mrb_value self, struct RProc *proc)
{
/* no argument passed from eval() */
mrb->c->ci->n = 0;
mrb->c->ci->nk = 0;
/* clear block */
mrb->c->ci->stack[1] = mrb_nil_value();
return mrb_exec_irep(mrb, self, proc);
}
static mrb_value
f_eval(mrb_state *mrb, mrb_value self)
{
const char *s;
mrb_int len;
mrb_value binding = mrb_nil_value();
const char *file = NULL;
mrb_int line = 1;
struct RProc *proc;
mrb_get_args(mrb, "s|ozi", &s, &len, &binding, &file, &line);
proc = create_proc_from_string(mrb, s, len, binding, file, line);
if (!mrb_nil_p(binding)) {
self = mrb_iv_get(mrb, binding, MRB_SYM(recv));
}
mrb_assert(!MRB_PROC_CFUNC_P(proc));
return exec_irep(mrb, self, proc);
}
static mrb_value
f_instance_eval(mrb_state *mrb, mrb_value self)
{
if (!mrb_block_given_p(mrb)) {
const char *s;
mrb_int len;
const char *file = NULL;
mrb_int line = 1;
mrb_value cv;
struct RProc *proc;
mrb_get_args(mrb, "s|zi", &s, &len, &file, &line);
cv = mrb_singleton_class(mrb, self);
proc = create_proc_from_string(mrb, s, len, mrb_nil_value(), file, line);
MRB_PROC_SET_TARGET_CLASS(proc, mrb_class_ptr(cv));
mrb_assert(!MRB_PROC_CFUNC_P(proc));
mrb_vm_ci_target_class_set(mrb->c->ci, mrb_class_ptr(cv));
return exec_irep(mrb, self, proc);
}
else {
mrb_get_args(mrb, "");
return mrb_obj_instance_eval(mrb, self);
}
}
static mrb_value
f_class_eval(mrb_state *mrb, mrb_value self)
{
if (!mrb_block_given_p(mrb)) {
const char *s;
mrb_int len;
const char *file = NULL;
mrb_int line = 1;
struct RProc *proc;
mrb_get_args(mrb, "s|zi", &s, &len, &file, &line);
proc = create_proc_from_string(mrb, s, len, mrb_nil_value(), file, line);
MRB_PROC_SET_TARGET_CLASS(proc, mrb_class_ptr(self));
mrb_assert(!MRB_PROC_CFUNC_P(proc));
mrb_vm_ci_target_class_set(mrb->c->ci, mrb_class_ptr(self));
return exec_irep(mrb, self, proc);
}
else {
mrb_get_args(mrb, "");
return mrb_mod_module_eval(mrb, self);
}
}
void
mrb_mruby_eval_gem_init(mrb_state* mrb)
{
mrb_define_module_function(mrb, mrb->kernel_module, "eval", f_eval, MRB_ARGS_ARG(1, 3));
mrb_define_method_id(mrb, mrb_class_get_id(mrb, MRB_SYM(BasicObject)), MRB_SYM(instance_eval), f_instance_eval, MRB_ARGS_OPT(3)|MRB_ARGS_BLOCK());
mrb_define_method_id(mrb, mrb_class_get_id(mrb, MRB_SYM(Module)), MRB_SYM(module_eval), f_class_eval, MRB_ARGS_OPT(3)|MRB_ARGS_BLOCK());
mrb_define_method_id(mrb, mrb_class_get_id(mrb, MRB_SYM(Module)), MRB_SYM(class_eval), f_class_eval, MRB_ARGS_OPT(3)|MRB_ARGS_BLOCK());
}
void
mrb_mruby_eval_gem_final(mrb_state* mrb)
{
}
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