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py: Implement compile builtin, enabled only on unix port.

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This should be pretty compliant with CPython, except perhaps for some
corner cases to do with globals/locals context.

Addresses issue #879.
This commit is contained in:
Damien George
2014-10-25 21:59:14 +01:00
parent e5a3759ff5
commit c9fc620723
7 changed files with 106 additions and 3 deletions
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86
py/builtinevex.c
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@@ -34,19 +34,87 @@
#include "lexerunix.h"
#include "parse.h"
#include "obj.h"
#include "objfun.h"
#include "parsehelper.h"
#include "compile.h"
#include "runtime0.h"
#include "runtime.h"
#include "builtin.h"
STATIC mp_obj_t eval_exec_helper(mp_uint_t n_args, const mp_obj_t *args, mp_parse_input_kind_t parse_input_kind) {
#if MICROPY_PY_BUILTINS_COMPILE
typedef struct _mp_obj_code_t {
mp_obj_base_t base;
mp_obj_t module_fun;
} mp_obj_code_t;
STATIC const mp_obj_type_t mp_type_code = {
{ &mp_type_type },
.name = MP_QSTR_code,
};
STATIC mp_obj_t code_execute(mp_obj_code_t *self, mp_obj_t globals, mp_obj_t locals) {
// save context and set new context
mp_obj_dict_t *old_globals = mp_globals_get();
mp_obj_dict_t *old_locals = mp_locals_get();
mp_globals_set(globals);
mp_locals_set(locals);
// a bit of a hack: fun_bc will re-set globals, so need to make sure it's
// the correct one
if (MP_OBJ_IS_TYPE(self->module_fun, &mp_type_fun_bc)) {
mp_obj_fun_bc_t *fun_bc = self->module_fun;
fun_bc->globals = globals;
}
// execute code
nlr_buf_t nlr;
if (nlr_push(&nlr) == 0) {
mp_obj_t ret = mp_call_function_0(self->module_fun);
nlr_pop();
mp_globals_set(old_globals);
mp_locals_set(old_locals);
return ret;
} else {
// exception; restore context and re-raise same exception
mp_globals_set(old_globals);
mp_locals_set(old_locals);
nlr_raise(nlr.ret_val);
}
}
STATIC mp_obj_t mp_builtin_compile(mp_uint_t n_args, const mp_obj_t *args) {
// get the source
mp_uint_t str_len;
const char *str = mp_obj_str_get_data(args[0], &str_len);
// create the lexer
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_string_gt_, str, str_len, 0);
// get the filename
qstr filename = mp_obj_str_get_qstr(args[1]);
// create the lexer
mp_lexer_t *lex = mp_lexer_new_from_str_len(filename, str, str_len, 0);
// get the compile mode
qstr mode = mp_obj_str_get_qstr(args[2]);
mp_parse_input_kind_t parse_input_kind;
switch (mode) {
case MP_QSTR_single: parse_input_kind = MP_PARSE_SINGLE_INPUT; break;
case MP_QSTR_exec: parse_input_kind = MP_PARSE_FILE_INPUT; break;
case MP_QSTR_eval: parse_input_kind = MP_PARSE_EVAL_INPUT; break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "bad compile mode"));
}
mp_obj_code_t *code = m_new_obj(mp_obj_code_t);
code->base.type = &mp_type_code;
code->module_fun = mp_parse_compile_execute(lex, parse_input_kind, NULL, NULL);
return code;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_compile_obj, 3, 6, mp_builtin_compile);
#endif // MICROPY_PY_BUILTINS_COMPILE
STATIC mp_obj_t eval_exec_helper(mp_uint_t n_args, const mp_obj_t *args, mp_parse_input_kind_t parse_input_kind) {
// work out the context
mp_obj_dict_t *globals = mp_globals_get();
mp_obj_dict_t *locals = mp_locals_get();
@@ -59,6 +127,18 @@ STATIC mp_obj_t eval_exec_helper(mp_uint_t n_args, const mp_obj_t *args, mp_pars
}
}
#if MICROPY_PY_BUILTINS_COMPILE
if (MP_OBJ_IS_TYPE(args[0], &mp_type_code)) {
return code_execute(args[0], globals, locals);
}
#endif
mp_uint_t str_len;
const char *str = mp_obj_str_get_data(args[0], &str_len);
// create the lexer
mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_string_gt_, str, str_len, 0);
return mp_parse_compile_execute(lex, parse_input_kind, globals, locals);
}