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builtins.c
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builtins.c
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// This file is a part of Julia. License is MIT: http://julialang.org/license
/*
implementations of some built-in functions and utilities
*/
#include "platform.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <setjmp.h>
#include <assert.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <inttypes.h>
#if defined(_OS_WINDOWS_)
#include <malloc.h>
#else
#include <unistd.h>
#endif
#include <ctype.h>
#include "julia.h"
#include "julia_internal.h"
#include "builtin_proto.h"
#ifdef __cplusplus
extern "C" {
#endif
// exceptions -----------------------------------------------------------------
JL_DLLEXPORT void JL_NORETURN jl_error(const char *str)
{
if (jl_errorexception_type == NULL) {
jl_printf(JL_STDERR, "ERROR: %s\n", str);
jl_exit(1);
}
jl_value_t *msg = jl_pchar_to_string((char*)str, strlen(str));
JL_GC_PUSH1(&msg);
jl_throw(jl_new_struct(jl_errorexception_type, msg));
}
extern int vasprintf(char **str, const char *fmt, va_list ap);
static jl_value_t *jl_vexceptionf(jl_datatype_t *exception_type,
const char *fmt, va_list args)
{
if (exception_type == NULL) {
jl_printf(JL_STDERR, "ERROR: ");
jl_vprintf(JL_STDERR, fmt, args);
jl_printf(JL_STDERR, "\n");
jl_exit(1);
}
char *str = NULL;
int ok = vasprintf(&str, fmt, args);
jl_value_t *msg;
if (ok < 0) { // vasprintf failed
msg = jl_cstr_to_string("internal error: could not display error message");
}
else {
msg = jl_pchar_to_string(str, strlen(str));
free(str);
}
JL_GC_PUSH1(&msg);
jl_value_t *e = jl_new_struct(exception_type, msg);
JL_GC_POP();
return e;
}
JL_DLLEXPORT void JL_NORETURN jl_errorf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
jl_value_t *e = jl_vexceptionf(jl_errorexception_type, fmt, args);
va_end(args);
jl_throw(e);
}
JL_DLLEXPORT void JL_NORETURN jl_exceptionf(jl_datatype_t *exception_type,
const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
jl_value_t *e = jl_vexceptionf(exception_type, fmt, args);
va_end(args);
jl_throw(e);
}
jl_value_t *jl_get_exceptionf(jl_datatype_t *exception_type,
const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
jl_value_t *e = jl_vexceptionf(exception_type, fmt, args);
va_end(args);
return e;
}
JL_DLLEXPORT void JL_NORETURN jl_too_few_args(const char *fname, int min)
{
jl_exceptionf(jl_argumenterror_type, "%s: too few arguments (expected %d)", fname, min);
}
JL_DLLEXPORT void JL_NORETURN jl_too_many_args(const char *fname, int max)
{
jl_exceptionf(jl_argumenterror_type, "%s: too many arguments (expected %d)", fname, max);
}
JL_DLLEXPORT void JL_NORETURN jl_type_error_rt(const char *fname, const char *context,
jl_value_t *ty, jl_value_t *got)
{
jl_value_t *ctxt=NULL;
JL_GC_PUSH2(&ctxt, &got);
ctxt = jl_pchar_to_string((char*)context, strlen(context));
jl_value_t *ex = jl_new_struct(jl_typeerror_type, jl_symbol(fname),
ctxt, ty, got);
jl_throw(ex);
}
JL_DLLEXPORT void JL_NORETURN jl_type_error(const char *fname, jl_value_t *expected,
jl_value_t *got)
{
jl_type_error_rt(fname, "", expected, got);
}
JL_DLLEXPORT void JL_NORETURN jl_undefined_var_error(jl_sym_t *var)
{
jl_throw(jl_new_struct(jl_undefvarerror_type, var));
}
JL_DLLEXPORT void JL_NORETURN jl_bounds_error(jl_value_t *v, jl_value_t *t)
{
JL_GC_PUSH2(&v, &t); // root arguments so the caller doesn't need to
jl_throw(jl_new_struct((jl_datatype_t*)jl_boundserror_type, v, t));
}
JL_DLLEXPORT void JL_NORETURN jl_bounds_error_v(jl_value_t *v, jl_value_t **idxs, size_t nidxs)
{
jl_value_t *t = NULL;
// items in idxs are assumed to already be rooted
JL_GC_PUSH2(&v, &t); // root v so the caller doesn't need to
t = jl_f_tuple(NULL, idxs, nidxs);
jl_throw(jl_new_struct((jl_datatype_t*)jl_boundserror_type, v, t));
}
JL_DLLEXPORT void JL_NORETURN jl_bounds_error_tuple_int(jl_value_t **v, size_t nv, size_t i)
{
// values in v are expected to already be gc-rooted
jl_bounds_error_int(jl_f_tuple(NULL, v, nv), i);
}
JL_DLLEXPORT void JL_NORETURN jl_bounds_error_unboxed_int(void *data, jl_value_t *vt, size_t i)
{
jl_value_t *t = NULL, *v = NULL;
// data is expected to be gc-safe (either gc-rooted, or alloca)
// vt is expected to be gc-rooted (in a linfo-root probably)
JL_GC_PUSH2(&v, &t);
v = jl_new_bits(vt, data);
t = jl_box_long(i);
jl_throw(jl_new_struct((jl_datatype_t*)jl_boundserror_type, v, t));
}
JL_DLLEXPORT void JL_NORETURN jl_bounds_error_int(jl_value_t *v, size_t i)
{
jl_value_t *t = NULL;
JL_GC_PUSH2(&v, &t); // root arguments so the caller doesn't need to
t = jl_box_long(i);
jl_throw(jl_new_struct((jl_datatype_t*)jl_boundserror_type, v, t));
}
JL_DLLEXPORT void JL_NORETURN jl_bounds_error_ints(jl_value_t *v, size_t *idxs, size_t nidxs)
{
size_t i;
jl_value_t *t = NULL;
JL_GC_PUSH2(&v, &t); // root arguments so the caller doesn't need to
t = (jl_value_t*)jl_alloc_svec(nidxs);
for (i = 0; i < nidxs; i++) {
jl_svecset(t, i, jl_box_long(idxs[i]));
}
t = jl_f_tuple(NULL, jl_svec_data(t), nidxs);
jl_throw(jl_new_struct((jl_datatype_t*)jl_boundserror_type, v, t));
}
JL_DLLEXPORT void JL_NORETURN jl_eof_error(void)
{
jl_datatype_t *eof_error =
(jl_datatype_t*)jl_get_global(jl_base_module, jl_symbol("EOFError"));
assert(eof_error != NULL);
jl_exceptionf(eof_error, "");
}
JL_DLLEXPORT jl_value_t *jl_get_keyword_sorter(jl_value_t *f)
{
jl_methtable_t *mt = jl_gf_mtable(f);
if (mt->kwsorter == NULL)
jl_errorf("function %s does not accept keyword arguments", jl_symbol_name(mt->name));
return mt->kwsorter;
}
JL_CALLABLE(jl_f_throw)
{
JL_NARGS(throw, 1, 1);
jl_throw(args[0]);
return jl_nothing;
}
JL_DLLEXPORT void jl_enter_handler(jl_handler_t *eh)
{
jl_ptls_t ptls = jl_get_ptls_states();
jl_task_t *current_task = ptls->current_task;
// Must have no safepoint
eh->prev = current_task->eh;
eh->gcstack = ptls->pgcstack;
#ifdef JULIA_ENABLE_THREADING
eh->gc_state = ptls->gc_state;
eh->locks_len = current_task->locks.len;
#endif
eh->defer_signal = ptls->defer_signal;
eh->finalizers_inhibited = ptls->finalizers_inhibited;
current_task->eh = eh;
#ifdef ENABLE_TIMINGS
eh->timing_stack = current_task->timing_stack;
#endif
}
JL_DLLEXPORT void jl_pop_handler(int n)
{
jl_ptls_t ptls = jl_get_ptls_states();
if (__unlikely(n <= 0))
return;
jl_handler_t *eh = ptls->current_task->eh;
while (--n > 0)
eh = eh->prev;
jl_eh_restore_state(eh);
}
// primitives -----------------------------------------------------------------
static int bits_equal(void *a, void *b, int sz)
{
switch (sz) {
case 1: return *(int8_t*)a == *(int8_t*)b;
case 2: return *(int16_t*)a == *(int16_t*)b;
case 4: return *(int32_t*)a == *(int32_t*)b;
case 8: return *(int64_t*)a == *(int64_t*)b;
default: return memcmp(a, b, sz)==0;
}
}
// jl_egal
// The frequently used jl_egal function deserves special attention when it
// comes to performance which is made challenging by the fact that the
// function has to handle quite a few different cases and because it is
// called recursively. To optimize performance many special cases are
// handle with separate comparisons which can dramatically reduce the run
// time of the function. The compiler can translate these simple tests
// with little effort, e.g., few registers are used.
//
// The complex cases require more effort and more registers to be translated
// efficiently. The effected cases include comparing tuples and fields. If
// the code to perform these operation would be inlined in the jl_egal
// function then the compiler would generate at the or close to the top of
// the function a prologue which saves all the callee-save registers and at
// the end the respective epilogue. The result is that even the fast cases
// are slowed down.
//
// The solution is to keep the code in jl_egal simple and split out the
// (more) complex cases into their own functions which are marked with
// NOINLINE.
static int NOINLINE compare_svec(jl_svec_t *a, jl_svec_t *b)
{
size_t l = jl_svec_len(a);
if (l != jl_svec_len(b))
return 0;
for(size_t i=0; i < l; i++) {
if (!jl_egal(jl_svecref(a,i),jl_svecref(b,i)))
return 0;
}
return 1;
}
// See comment above for an explanation of NOINLINE.
static int NOINLINE compare_fields(jl_value_t *a, jl_value_t *b, jl_datatype_t *dt)
{
size_t nf = jl_datatype_nfields(dt);
for (size_t f=0; f < nf; f++) {
size_t offs = jl_field_offset(dt, f);
char *ao = (char*)jl_data_ptr(a) + offs;
char *bo = (char*)jl_data_ptr(b) + offs;
int eq;
if (jl_field_isptr(dt, f)) {
jl_value_t *af = *(jl_value_t**)ao;
jl_value_t *bf = *(jl_value_t**)bo;
if (af == bf) eq = 1;
else if (af==NULL || bf==NULL) eq = 0;
else eq = jl_egal(af, bf);
}
else {
jl_datatype_t *ft = (jl_datatype_t*)jl_field_type(dt, f);
if (!ft->layout->haspadding) {
eq = bits_equal(ao, bo, jl_field_size(dt, f));
}
else {
assert(jl_datatype_nfields(ft) > 0);
eq = compare_fields((jl_value_t*)ao, (jl_value_t*)bo, ft);
}
}
if (!eq) return 0;
}
return 1;
}
JL_DLLEXPORT int jl_egal(jl_value_t *a, jl_value_t *b)
{
// warning: a,b may NOT have been gc-rooted by the caller
if (a == b)
return 1;
jl_value_t *ta = (jl_value_t*)jl_typeof(a);
if (ta != (jl_value_t*)jl_typeof(b))
return 0;
if (jl_is_svec(a))
return compare_svec((jl_svec_t*)a, (jl_svec_t*)b);
jl_datatype_t *dt = (jl_datatype_t*)ta;
if (dt == jl_datatype_type) {
jl_datatype_t *dta = (jl_datatype_t*)a;
jl_datatype_t *dtb = (jl_datatype_t*)b;
return dta->name == dtb->name && compare_svec(dta->parameters, dtb->parameters);
}
if (dt->mutabl) return 0;
size_t sz = dt->size;
if (sz == 0) return 1;
size_t nf = jl_datatype_nfields(dt);
if (nf == 0)
return bits_equal(jl_data_ptr(a), jl_data_ptr(b), sz);
return compare_fields(a, b, dt);
}
JL_CALLABLE(jl_f_is)
{
JL_NARGS(is, 2, 2);
if (args[0] == args[1])
return jl_true;
return jl_egal(args[0],args[1]) ? jl_true : jl_false;
}
JL_CALLABLE(jl_f_typeof)
{
JL_NARGS(typeof, 1, 1);
return jl_typeof(args[0]);
}
JL_CALLABLE(jl_f_sizeof)
{
JL_NARGS(sizeof, 1, 1);
jl_value_t *x = args[0];
if (jl_is_datatype(x)) {
jl_datatype_t *dx = (jl_datatype_t*)x;
if (dx->name == jl_array_typename || dx == jl_symbol_type || dx == jl_simplevector_type)
jl_error("type does not have a canonical binary representation");
if (!(dx->name->names == jl_emptysvec && dx->size > 0)) {
// names===() and size > 0 => bitstype, size always known
if (dx->abstract || !jl_is_leaf_type(x))
jl_error("argument is an abstract type; size is indeterminate");
}
return jl_box_long(jl_datatype_size(x));
}
if (jl_is_array(x)) {
return jl_box_long(jl_array_len(x) * ((jl_array_t*)x)->elsize);
}
jl_datatype_t *dt = (jl_datatype_t*)jl_typeof(x);
assert(jl_is_datatype(dt));
assert(!dt->abstract);
if (dt == jl_symbol_type)
jl_error("value does not have a canonical binary representation");
if (dt == jl_simplevector_type)
return jl_box_long((1+jl_svec_len(x))*sizeof(void*));
return jl_box_long(jl_datatype_size(dt));
}
JL_CALLABLE(jl_f_issubtype)
{
JL_NARGS(subtype, 2, 2);
if (!jl_is_typevar(args[0]))
JL_TYPECHK(subtype, type, args[0]);
if (!jl_is_typevar(args[1]))
JL_TYPECHK(subtype, type, args[1]);
return (jl_subtype(args[0],args[1],0) ? jl_true : jl_false);
}
JL_CALLABLE(jl_f_isa)
{
JL_NARGS(isa, 2, 2);
JL_TYPECHK(isa, type, args[1]);
return (jl_subtype(args[0],args[1],1) ? jl_true : jl_false);
}
JL_DLLEXPORT void jl_typeassert(jl_value_t *x, jl_value_t *t)
{
if (!jl_subtype(x,t,1))
jl_type_error("typeassert", t, x);
}
JL_CALLABLE(jl_f_typeassert)
{
JL_NARGS(typeassert, 2, 2);
JL_TYPECHK(typeassert, type, args[1]);
if (!jl_subtype(args[0],args[1],1))
jl_type_error("typeassert", args[1], args[0]);
return args[0];
}
// perform f(args...) on stack
JL_DLLEXPORT jl_value_t *jl_apply_2va(jl_value_t *f, jl_value_t **args, uint32_t nargs)
{
nargs++;
int onstack = (nargs < jl_page_size/sizeof(jl_value_t*));
jl_value_t **newargs;
JL_GC_PUSHARGS(newargs, onstack ? nargs : 1);
jl_svec_t *arg_heap = NULL;
newargs[0] = f; // make sure f is rooted
if (!onstack) {
arg_heap = jl_alloc_svec(nargs);
newargs[0] = (jl_value_t*)arg_heap;
newargs = jl_svec_data(arg_heap);
newargs[0] = f;
}
memcpy(&newargs[1], args, (nargs-1)*sizeof(jl_value_t*));
jl_value_t *ret = jl_apply_generic(newargs, nargs);
JL_GC_POP();
return ret;
}
static jl_function_t *jl_append_any_func;
JL_CALLABLE(jl_f__apply)
{
JL_NARGSV(apply, 1);
jl_function_t *f = args[0];
if (nargs == 2) {
if (f == jl_builtin_svec) {
if (jl_is_svec(args[1]))
return args[1];
if (jl_is_array(args[1])) {
size_t n = jl_array_len(args[1]);
jl_svec_t *t = jl_alloc_svec(n);
JL_GC_PUSH1(&t);
for(size_t i=0; i < n; i++) {
jl_svecset(t, i, jl_arrayref((jl_array_t*)args[1], i));
}
JL_GC_POP();
return (jl_value_t*)t;
}
}
}
size_t n=0, i, j;
for(i=1; i < nargs; i++) {
if (jl_is_svec(args[i])) {
n += jl_svec_len(args[i]);
}
else if (jl_is_tuple(args[i])) {
n += jl_nfields(args[i]);
}
else if (jl_is_array(args[i])) {
n += jl_array_len(args[i]);
}
else {
if (jl_append_any_func == NULL) {
jl_append_any_func =
(jl_function_t*)jl_get_global(jl_base_module, jl_symbol("append_any"));
if (jl_append_any_func == NULL) {
// error if append_any not available
JL_TYPECHK(apply, tuple, jl_typeof(args[i]));
}
}
jl_array_t *argarr = NULL;
JL_GC_PUSH2(&argarr, &f);
args[0] = jl_append_any_func;
argarr = (jl_array_t*)jl_apply(args, nargs);
assert(jl_typeis(argarr, jl_array_any_type));
jl_array_grow_beg(argarr, 1);
jl_array_ptr_set(argarr, 0, f);
args[0] = f;
jl_value_t *result = jl_apply(jl_array_ptr_data(argarr), jl_array_len(argarr));
JL_GC_POP();
return result;
}
}
jl_value_t **newargs;
n++;
int onstack = (n < jl_page_size/sizeof(jl_value_t*));
JL_GC_PUSHARGS(newargs, onstack ? n : 1);
jl_svec_t *arg_heap = NULL;
if (!onstack) {
// put arguments on the heap if there are too many
arg_heap = jl_alloc_svec(n);
newargs[0] = (jl_value_t*)arg_heap;
newargs = jl_svec_data(arg_heap);
}
// GC Note: here we assume that the return value of `jl_svecref`,
// `jl_array_ptr_ref` will not be young if `arg_heap` becomes old
// since they are allocated before `arg_heap`. Otherwise,
// we need to add write barrier for !onstack
newargs[0] = f;
n = 1;
for(i=1; i < nargs; i++) {
jl_value_t *ai = args[i];
if (jl_is_svec(ai)) {
jl_svec_t *t = (jl_svec_t*)ai;
size_t al = jl_svec_len(t);
for(j=0; j < al; j++)
newargs[n++] = jl_svecref(t, j);
}
else if (jl_is_tuple(ai)) {
size_t al = jl_nfields(ai);
for(j=0; j < al; j++) {
// jl_fieldref may allocate.
newargs[n++] = jl_fieldref(ai, j);
if (arg_heap)
jl_gc_wb(arg_heap, newargs[n - 1]);
}
}
else {
assert(jl_is_array(ai));
jl_array_t *aai = (jl_array_t*)ai;
size_t al = jl_array_len(aai);
if (aai->flags.ptrarray) {
for (j = 0; j < al; j++) {
jl_value_t *arg = jl_array_ptr_ref(aai, j);
// apply with array splatting may have embedded NULL value
// #11772
if (__unlikely(arg == NULL))
jl_throw(jl_undefref_exception);
newargs[n++] = arg;
}
}
else {
for (j = 0; j < al; j++) {
newargs[n++] = jl_arrayref(aai, j);
if (arg_heap)
jl_gc_wb(arg_heap, newargs[n - 1]);
}
}
}
}
jl_value_t *result = jl_apply(newargs, n);
JL_GC_POP();
return result;
}
// eval -----------------------------------------------------------------------
JL_DLLEXPORT jl_value_t *jl_toplevel_eval_in(jl_module_t *m, jl_value_t *ex)
{
return jl_toplevel_eval_in_warn(m, ex, 0);
}
jl_value_t *jl_toplevel_eval_in_warn(jl_module_t *m, jl_value_t *ex, int delay_warn)
{
jl_ptls_t ptls = jl_get_ptls_states();
static int jl_warn_on_eval = 0;
int last_delay_warn = jl_warn_on_eval;
if (m == NULL)
m = jl_main_module;
if (jl_is_symbol(ex))
return jl_eval_global_var(m, (jl_sym_t*)ex);
jl_value_t *v=NULL;
int last_lineno = jl_lineno;
jl_module_t *last_m = ptls->current_module;
jl_module_t *task_last_m = ptls->current_task->current_module;
if (!delay_warn && jl_options.incremental && jl_generating_output()) {
if (m != last_m) {
jl_printf(JL_STDERR, "WARNING: eval from module %s to %s: \n",
jl_symbol_name(m->name), jl_symbol_name(last_m->name));
jl_static_show(JL_STDERR, ex);
jl_printf(JL_STDERR, "\n ** incremental compilation may be broken for this module **\n\n");
}
else if (jl_warn_on_eval) {
jl_printf(JL_STDERR, "WARNING: eval from staged function in module %s: \n", jl_symbol_name(m->name));
jl_static_show(JL_STDERR, ex);
jl_printf(JL_STDERR, "\n ** incremental compilation may be broken for these modules **\n\n");
}
}
if (in_pure_callback && !delay_warn)
jl_error("eval cannot be used in a generated function");
JL_TRY {
jl_warn_on_eval = delay_warn && (jl_warn_on_eval || m != last_m); // compute whether a warning was suppressed
ptls->current_task->current_module = ptls->current_module = m;
v = jl_toplevel_eval(ex);
}
JL_CATCH {
jl_warn_on_eval = last_delay_warn;
jl_lineno = last_lineno;
ptls->current_module = last_m;
ptls->current_task->current_module = task_last_m;
jl_rethrow();
}
jl_warn_on_eval = last_delay_warn;
jl_lineno = last_lineno;
ptls->current_module = last_m;
ptls->current_task->current_module = task_last_m;
assert(v);
return v;
}
JL_CALLABLE(jl_f_isdefined)
{
jl_ptls_t ptls = jl_get_ptls_states();
jl_module_t *m = ptls->current_module;
jl_sym_t *s=NULL;
JL_NARGSV(isdefined, 1);
if (jl_is_array(args[0])) {
return jl_array_isdefined(args, nargs) ? jl_true : jl_false;
}
if (nargs == 1) {
JL_TYPECHK(isdefined, symbol, args[0]);
s = (jl_sym_t*)args[0];
}
if (nargs != 2) {
JL_NARGS(isdefined, 1, 1);
}
else {
if (!jl_is_module(args[0])) {
jl_datatype_t *vt = (jl_datatype_t*)jl_typeof(args[0]);
if (!jl_is_datatype(vt)) {
jl_type_error("isdefined", (jl_value_t*)jl_datatype_type, args[0]);
}
size_t idx;
if (jl_is_long(args[1])) {
idx = jl_unbox_long(args[1])-1;
if (idx >= jl_datatype_nfields(vt))
return jl_false;
}
else {
JL_TYPECHK(isdefined, symbol, args[1]);
idx = jl_field_index(vt, (jl_sym_t*)args[1], 0);
if ((int)idx == -1)
return jl_false;
}
return jl_field_isdefined(args[0], idx) ? jl_true : jl_false;
}
JL_TYPECHK(isdefined, module, args[0]);
JL_TYPECHK(isdefined, symbol, args[1]);
m = (jl_module_t*)args[0];
s = (jl_sym_t*)args[1];
}
assert(s);
return jl_boundp(m, s) ? jl_true : jl_false;
}
// tuples ---------------------------------------------------------------------
JL_CALLABLE(jl_f_tuple)
{
size_t i;
if (nargs == 0) return (jl_value_t*)jl_emptytuple;
jl_datatype_t *tt;
if (nargs < jl_page_size/sizeof(jl_value_t*)) {
jl_value_t **types = (jl_value_t**)alloca(nargs*sizeof(jl_value_t*));
for(i=0; i < nargs; i++)
types[i] = jl_typeof(args[i]);
tt = jl_inst_concrete_tupletype_v(types, nargs);
}
else {
jl_svec_t *types = jl_alloc_svec_uninit(nargs);
JL_GC_PUSH1(&types);
for(i=0; i < nargs; i++)
jl_svecset(types, i, jl_typeof(args[i]));
tt = jl_inst_concrete_tupletype(types);
JL_GC_POP();
}
return jl_new_structv(tt, args, nargs);
}
JL_CALLABLE(jl_f_svec)
{
size_t i;
if (nargs == 0) return (jl_value_t*)jl_emptysvec;
jl_svec_t *t = jl_alloc_svec_uninit(nargs);
for(i=0; i < nargs; i++) {
jl_svecset(t, i, args[i]);
}
return (jl_value_t*)t;
}
// composite types ------------------------------------------------------------
JL_CALLABLE(jl_f_getfield)
{
JL_NARGS(getfield, 2, 2);
jl_value_t *v = args[0];
jl_value_t *vt = (jl_value_t*)jl_typeof(v);
if (vt == (jl_value_t*)jl_module_type) {
JL_TYPECHK(getfield, symbol, args[1]);
return jl_eval_global_var((jl_module_t*)v, (jl_sym_t*)args[1]);
}
if (!jl_is_datatype(vt))
jl_type_error("getfield", (jl_value_t*)jl_datatype_type, v);
jl_datatype_t *st = (jl_datatype_t*)vt;
size_t idx;
if (jl_is_long(args[1])) {
idx = jl_unbox_long(args[1])-1;
if (idx >= jl_datatype_nfields(st))
jl_bounds_error(args[0], args[1]);
}
else {
JL_TYPECHK(getfield, symbol, args[1]);
jl_sym_t *fld = (jl_sym_t*)args[1];
idx = jl_field_index(st, fld, 1);
}
jl_value_t *fval = jl_get_nth_field(v, idx);
if (fval == NULL)
jl_throw(jl_undefref_exception);
return fval;
}
JL_CALLABLE(jl_f_setfield)
{
JL_NARGS(setfield!, 3, 3);
jl_value_t *v = args[0];
jl_value_t *vt = (jl_value_t*)jl_typeof(v);
if (vt == (jl_value_t*)jl_module_type)
jl_error("cannot assign variables in other modules");
if (!jl_is_datatype(vt))
jl_type_error("setfield!", (jl_value_t*)jl_datatype_type, v);
jl_datatype_t *st = (jl_datatype_t*)vt;
if (!st->mutabl)
jl_errorf("type %s is immutable", jl_symbol_name(st->name->name));
size_t idx;
if (jl_is_long(args[1])) {
idx = jl_unbox_long(args[1])-1;
if (idx >= jl_datatype_nfields(st))
jl_bounds_error(args[0], args[1]);
}
else {
JL_TYPECHK(setfield!, symbol, args[1]);
idx = jl_field_index(st, (jl_sym_t*)args[1], 1);
}
jl_value_t *ft = jl_field_type(st,idx);
if (!jl_subtype(args[2], ft, 1)) {
jl_type_error("setfield!", ft, args[2]);
}
jl_set_nth_field(v, idx, args[2]);
return args[2];
}
JL_CALLABLE(jl_f_fieldtype)
{
JL_NARGS(fieldtype, 2, 2);
jl_datatype_t *st = (jl_datatype_t*)args[0];
if (st == jl_module_type)
jl_error("cannot assign variables in other modules");
if (!jl_is_datatype(st))
jl_type_error("fieldtype", (jl_value_t*)jl_datatype_type, (jl_value_t*)st);
int field_index;
if (jl_is_long(args[1])) {
field_index = jl_unbox_long(args[1]) - 1;
if (field_index < 0 || field_index >= jl_field_count(st))
jl_bounds_error(args[0], args[1]);
}
else {
JL_TYPECHK(fieldtype, symbol, args[1]);
field_index = jl_field_index(st, (jl_sym_t*)args[1], 1);
}
return jl_field_type(st, field_index);
}
JL_CALLABLE(jl_f_nfields)
{
JL_NARGS(nfields, 1, 1);
jl_value_t *x = args[0];
if (!jl_is_datatype(x))
x = jl_typeof(x);
return jl_box_long(jl_field_count(x));
}
// conversion -----------------------------------------------------------------
JL_DLLEXPORT void *(jl_symbol_name)(jl_sym_t *s)
{
return jl_symbol_name(s);
}
// WARNING: THIS FUNCTION IS NEVER CALLED BUT INLINE BY CCALL
JL_DLLEXPORT void *jl_array_ptr(jl_array_t *a)
{
return a->data;
}
JL_DLLEXPORT jl_value_t *jl_value_ptr(jl_value_t *a)
{
return a;
}
// printing -------------------------------------------------------------------
int substr_isspace(char *p, char *pend)
{
while (p != pend) {
if (!isspace((unsigned char)*p)) {
return 0;
}
p++;
}
return 1;
}
int str_isspace(char *p)
{
while (*p != '\0') {
if (!isspace((unsigned char)*p)) {
return 0;
}
p++;
}
return 1;
}
JL_DLLEXPORT jl_nullable_float64_t jl_try_substrtod(char *str, size_t offset, size_t len)
{
char *p;
char *bstr = str+offset;
char *pend = bstr+len;
char *tofree = NULL;
int err = 0;
errno = 0;
if (!(*pend == '\0' || isspace((unsigned char)*pend) || *pend == ',')) {
// confusing data outside substring. must copy.
char *newstr;
if (len + 1 < jl_page_size) {
newstr = (char*)alloca(len + 1);
}
else {
newstr = tofree = (char*)malloc(len + 1);
}
memcpy(newstr, bstr, len);
newstr[len] = 0;
bstr = newstr;
pend = bstr+len;
}
double out = jl_strtod_c(bstr, &p);
if (errno==ERANGE && (out==0 || out==HUGE_VAL || out==-HUGE_VAL)) {
err = 1;
}
else if (p == bstr) {
err = 1;
}
else {
// Deal with case where the substring might be something like "1 ",
// which is OK, and "1 X", which we don't allow.
err = substr_isspace(p, pend) ? 0 : 1;
}
if (__unlikely(tofree))
free(tofree);
jl_nullable_float64_t ret = {(uint8_t)err, out};
return ret;
}
JL_DLLEXPORT int jl_substrtod(char *str, size_t offset, size_t len, double *out)
{
jl_nullable_float64_t nd = jl_try_substrtod(str, offset, len);
if (0 == nd.isnull) {
*out = nd.value;
return 0;
}
return 1;
}
// MSVC pre-2013 did not define HUGE_VALF
#ifndef HUGE_VALF
#define HUGE_VALF (1e25f * 1e25f)
#endif
JL_DLLEXPORT jl_nullable_float32_t jl_try_substrtof(char *str, size_t offset, size_t len)
{
char *p;
char *bstr = str+offset;
char *pend = bstr+len;
char *tofree = NULL;
int err = 0;
errno = 0;
if (!(*pend == '\0' || isspace((unsigned char)*pend) || *pend == ',')) {
// confusing data outside substring. must copy.
char *newstr;
if (len + 1 < jl_page_size) {
newstr = (char*)alloca(len + 1);
}
else {
newstr = tofree = (char*)malloc(len + 1);
}
memcpy(newstr, bstr, len);
newstr[len] = 0;
bstr = newstr;
pend = bstr+len;
}
#if defined(_OS_WINDOWS_) && !defined(_COMPILER_MINGW_)
float out = (float)jl_strtod_c(bstr, &p);
#else
float out = jl_strtof_c(bstr, &p);
#endif
if (errno==ERANGE && (out==0 || out==HUGE_VALF || out==-HUGE_VALF)) {
err = 1;
}
else if (p == bstr) {
err = 1;
}
else {
// Deal with case where the substring might be something like "1 ",
// which is OK, and "1 X", which we don't allow.
err = substr_isspace(p, pend) ? 0 : 1;
}
if (__unlikely(tofree))
free(tofree);
jl_nullable_float32_t ret = {(uint8_t)err, out};
return ret;
}
JL_DLLEXPORT int jl_substrtof(char *str, int offset, size_t len, float *out)
{
jl_nullable_float32_t nf = jl_try_substrtof(str, offset, len);
if (0 == nf.isnull) {
*out = nf.value;
return 0;
}
return 1;
}
// showing --------------------------------------------------------------------
JL_DLLEXPORT void jl_flush_cstdio(void)
{
fflush(stdout);
fflush(stderr);
}
JL_DLLEXPORT jl_value_t *jl_stdout_obj(void)
{
if (jl_base_module == NULL) return NULL;
jl_value_t *stdout_obj = jl_get_global(jl_base_module, jl_symbol("STDOUT"));
return stdout_obj;
}
JL_DLLEXPORT jl_value_t *jl_stderr_obj(void)
{
if (jl_base_module == NULL) return NULL;
jl_value_t *stderr_obj = jl_get_global(jl_base_module, jl_symbol("STDERR"));
return stderr_obj;
}
static jl_function_t *jl_show_gf=NULL;
JL_DLLEXPORT void jl_show(jl_value_t *stream, jl_value_t *v)
{
if (jl_base_module) {
if (jl_show_gf == NULL) {
jl_show_gf = (jl_function_t*)jl_get_global(jl_base_module, jl_symbol("show"));
}
if (jl_show_gf==NULL || stream==NULL) {
jl_printf(JL_STDERR, " could not show value of type %s",
jl_symbol_name(((jl_datatype_t*)jl_typeof(v))->name->name));
return;
}
jl_value_t *args[3] = {jl_show_gf,stream,v};
jl_apply(args, 3);
}
}
// internal functions ---------------------------------------------------------
JL_CALLABLE(jl_f_apply_type)
{
JL_NARGSV(apply_type, 1);
if (!jl_is_datatype(args[0]) && !jl_is_typector(args[0])) {
jl_type_error("Type{...} expression", (jl_value_t*)jl_type_type, args[0]);
}
return jl_apply_type_(args[0], &args[1], nargs-1);
}
// generic function reflection ------------------------------------------------
static void jl_check_type_tuple(jl_value_t *t, jl_sym_t *name, const char *ctx)
{
if (!jl_is_tuple_type(t))
jl_type_error_rt(jl_symbol_name(name), ctx, (jl_value_t*)jl_type_type, t);
}
JL_CALLABLE(jl_f_applicable)
{
JL_NARGSV(applicable, 1);
return jl_method_lookup(jl_gf_mtable(args[0]), args, nargs, 1) != NULL ?
jl_true : jl_false;
}