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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: https://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>
#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 -----------------------------------------------------------------
DLLEXPORT void NORETURN jl_error(const char *str)
{
if (jl_errorexception_type == NULL) {
jl_printf(JL_STDERR, "%s", 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 void NORETURN jl_vexceptionf(jl_datatype_t *exception_type, const char *fmt, va_list args)
{
if (exception_type == NULL) {
jl_vprintf(JL_STDERR, fmt, args);
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_throw(jl_new_struct(exception_type, msg));
}
DLLEXPORT void NORETURN jl_errorf(const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
jl_vexceptionf(jl_errorexception_type, fmt, args);
va_end(args);
}
DLLEXPORT void NORETURN jl_exceptionf(jl_datatype_t *exception_type, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
jl_vexceptionf(exception_type, fmt, args);
va_end(args);
}
void NORETURN jl_too_few_args(const char *fname, int min)
{
jl_exceptionf(jl_argumenterror_type, "%s: too few arguments (expected %d)", fname, min);
}
void NORETURN jl_too_many_args(const char *fname, int max)
{
jl_exceptionf(jl_argumenterror_type, "%s: too many arguments (expected %d)", fname, max);
}
void 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);
}
void NORETURN jl_type_error_rt_line(const char *fname, const char *context,
jl_value_t *ty, jl_value_t *got, int line)
{
jl_type_error_rt(fname, context, ty, got);
}
void NORETURN jl_type_error(const char *fname, jl_value_t *expected, jl_value_t *got)
{
jl_type_error_rt(fname, "", expected, got);
}
DLLEXPORT void NORETURN jl_undefined_var_error(jl_sym_t *var)
{
if (var->name[0] == '#') {
// convention for renamed variables: #...#original_name
char *nxt = strchr(var->name+1, '#');
if (nxt)
var = jl_symbol(nxt+1);
}
jl_throw(jl_new_struct(jl_undefvarerror_type, var));
}
DLLEXPORT void 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));
}
DLLEXPORT void 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));
}
DLLEXPORT void 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);
}
DLLEXPORT void 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));
}
DLLEXPORT void 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));
}
DLLEXPORT void 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_CALLABLE(jl_f_throw)
{
JL_NARGS(throw, 1, 1);
jl_throw(args[0]);
return jl_nothing;
}
void jl_enter_handler(jl_handler_t *eh)
{
JL_SIGATOMIC_BEGIN();
eh->prev = jl_current_task->eh;
#ifdef JL_GC_MARKSWEEP
eh->gcstack = jl_pgcstack;
#endif
jl_current_task->eh = eh;
// TODO: this should really go after setjmp(). see comment in
// ctx_switch in task.c.
JL_SIGATOMIC_END();
}
void jl_pop_handler(int n)
{
while (n > 0) {
jl_eh_restore_state(jl_current_task->eh);
n--;
}
}
// 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_value_t *a, jl_value_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)
{
for (size_t f=0; f < nf; f++) {
size_t offs = dt->fields[f].offset;
char *ao = (char*)jl_data_ptr(a) + offs;
char *bo = (char*)jl_data_ptr(b) + offs;
int eq;
if (dt->fields[f].isptr) {
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 {
eq = bits_equal(ao, bo, dt->fields[f].size);
}
if (!eq) return 0;
}
return 1;
}
int jl_egal(jl_value_t *a, jl_value_t *b)
{
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(a, 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 &&
jl_egal((jl_value_t*)dta->parameters, (jl_value_t*)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, nf);
}
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_no_function)
{
jl_error("invalid function object");
return jl_nothing;
}
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)
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");
return jl_box_long(jl_datatype_size(dt));
}
JL_CALLABLE(jl_f_subtype)
{
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);
}
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];
}
static jl_function_t *jl_append_any_func;
JL_CALLABLE(jl_f_apply)
{
JL_NARGSV(apply, 2);
jl_function_t *f;
jl_function_t *call_func = (jl_function_t*)args[0];
assert(jl_is_function(call_func));
if (jl_is_function(args[1])) {
f = (jl_function_t*)args[1];
--nargs; ++args; /* args[1] becomes args[0] */
}
else { /* do generic call(args...) instead */
f = call_func;
// protect "function" arg from splicing
args[1] = (jl_value_t*)jl_svec1(args[1]);
}
if (nargs == 2) {
if (f->fptr == &jl_f_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;
}
}
if (jl_is_svec(args[1])) {
return jl_apply(f, jl_svec_data(args[1]), jl_svec_len(args[1]));
}
}
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_typeis(args[i], jl_array_any_type)) {
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_value_t *argarr = jl_apply(jl_append_any_func, &args[1], nargs-1);
assert(jl_typeis(argarr, jl_array_any_type));
JL_GC_PUSH1(&argarr);
jl_value_t *result = jl_apply(f, jl_cell_data(argarr), jl_array_len(argarr));
JL_GC_POP();
return result;
}
}
jl_value_t **newargs;
int onstack = (n < jl_page_size/sizeof(jl_value_t*));
JL_GC_PUSHARGS(newargs, onstack ? n : 1);
if (!onstack) {
// put arguments on the heap if there are too many
jl_value_t *argarr = (jl_value_t*)jl_alloc_cell_1d(n);
newargs[0] = argarr;
newargs = jl_cell_data(argarr);
}
n = 0;
for(i=1; i < nargs; i++) {
if (jl_is_svec(args[i])) {
jl_svec_t *t = (jl_svec_t*)args[i];
size_t al = jl_svec_len(t);
for(j=0; j < al; j++)
newargs[n++] = jl_svecref(t, j);
}
else if (jl_is_tuple(args[i])) {
size_t al = jl_nfields(args[i]);
for(j=0; j < al; j++)
newargs[n++] = jl_fieldref(args[i], j);
}
else {
size_t al = jl_array_len(args[i]);
for(j=0; j < al; j++)
newargs[n++] = jl_cellref(args[i], j);
}
}
jl_value_t *result = jl_apply(f, newargs, n);
JL_GC_POP();
return result;
}
JL_CALLABLE(jl_f_kwcall)
{
if (nargs < 4)
jl_error("internal error: malformed keyword argument call");
jl_function_t *f;
jl_function_t *call_func = (jl_function_t*)args[0];
assert(jl_is_function(call_func));
size_t nkeys = jl_unbox_long(args[1]);
size_t pa = 4 + 2*nkeys;
jl_array_t *container = (jl_array_t*)args[pa-1];
assert(jl_array_len(container) > 0);
f = (jl_function_t*)args[pa-2];
if (!jl_is_function(f)) {
// do generic call(args...; kws...) instead
// switch (f container pa...) to (container f pa...)
args[pa-2] = args[pa-1]; // TODO: this might not be safe
args[pa-1] = (jl_value_t*)f;
f = call_func;
pa--;
}
if (!jl_is_gf(f))
jl_exceptionf(jl_argumenterror_type, "function does not accept keyword arguments");
jl_function_t *sorter = ((jl_methtable_t*)f->env)->kwsorter;
if (sorter == NULL) {
jl_exceptionf(jl_argumenterror_type, "function %s does not accept keyword arguments",
jl_gf_name(f)->name);
}
for(size_t i=0; i < nkeys*2; i+=2) {
jl_cellset(container, i , args[2+i]);
jl_cellset(container, i+1, args[2+i+1]);
}
args += pa-1;
nargs -= pa-1;
assert(jl_is_gf(sorter));
jl_function_t *m = jl_method_lookup((jl_methtable_t*)sorter->env, args, nargs, 1);
if (m == jl_bottom_func) {
jl_no_method_error(f, args+1, nargs-1);
// unreachable
}
return jl_apply(m, args, nargs);
}
// eval -----------------------------------------------------------------------
extern int jl_lineno;
DLLEXPORT jl_value_t *jl_toplevel_eval_in(jl_module_t *m, jl_value_t *ex)
{
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 = jl_current_module;
jl_module_t *task_last_m = jl_current_task->current_module;
JL_TRY {
jl_current_task->current_module = jl_current_module = m;
v = jl_toplevel_eval(ex);
}
JL_CATCH {
jl_lineno = last_lineno;
jl_current_module = last_m;
jl_current_task->current_module = task_last_m;
jl_rethrow();
}
jl_lineno = last_lineno;
jl_current_module = last_m;
jl_current_task->current_module = task_last_m;
assert(v);
return v;
}
JL_CALLABLE(jl_f_top_eval)
{
jl_module_t *m;
jl_value_t *ex;
if (nargs == 1) {
m = jl_main_module;
ex = args[0];
}
else {
JL_NARGS(eval, 2, 2);
JL_TYPECHK(eval, module, args[0]);
m = (jl_module_t*)args[0];
ex = args[1];
}
return jl_toplevel_eval_in(m, ex);
}
JL_CALLABLE(jl_f_isdefined)
{
jl_module_t *m = jl_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 = 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_get_field)
{
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_set_field)
{
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", st->name->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_field_type)
{
JL_NARGS(fieldtype, 2, 2);
jl_datatype_t *st = (jl_datatype_t*)args[0];
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_datatype_nfields(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_datatype_nfields(x));
}
// conversion -----------------------------------------------------------------
DLLEXPORT void *jl_symbol_name(jl_sym_t *s)
{
return s->name;
}
//WARNING: THIS FUNCTION IS NEVER CALLED BUT INLINE BY CCALL
DLLEXPORT void *jl_array_ptr(jl_array_t *a)
{
return a->data;
}
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;
}
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;
int err = 0;
errno = 0;
if (!(*pend == '\0' || isspace((unsigned char)*pend) || *pend == ',')) {
// confusing data outside substring. must copy.
char *newstr = (char*)malloc(len+1);
memcpy(newstr, bstr, len);
newstr[len] = 0;
bstr = newstr;
pend = bstr+len;
}
double out = 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 (bstr != str+offset)
free(bstr);
jl_nullable_float64_t ret = {(uint8_t)err, out};
return ret;
}
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
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;
int err = 0;
errno = 0;
if (!(*pend == '\0' || isspace((unsigned char)*pend) || *pend == ',')) {
// confusing data outside substring. must copy.
char *newstr = (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)strtod_c(bstr, &p);
#else
float out = 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 (bstr != str+offset)
free(bstr);
jl_nullable_float32_t ret = {(uint8_t)err, out};
return ret;
}
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 --------------------------------------------------------------------
void jl_flush_cstdio(void)
{
fflush(stdout);
fflush(stderr);
}
jl_value_t *jl_stdout_obj(void)
{
jl_value_t *stdout_obj = jl_get_global(jl_base_module, jl_symbol("STDOUT"));
if (stdout_obj != NULL) return stdout_obj;
return jl_get_global(jl_base_module, jl_symbol("OUTPUT_STREAM"));
}
jl_value_t *jl_stderr_obj(void)
{
jl_value_t *stderr_obj = jl_get_global(jl_base_module, jl_symbol("STDERR"));
if (stderr_obj != NULL) return stderr_obj;
return jl_get_global(jl_base_module, jl_symbol("OUTPUT_STREAM"));
}
static jl_function_t *jl_show_gf=NULL;
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_datatype_t*)jl_typeof(v))->name->name->name);
return;
}
jl_value_t *args[2] = {stream,v};
jl_apply(jl_show_gf, args, 2);
}
}
// internal functions ---------------------------------------------------------
extern int jl_in_inference;
extern int jl_boot_file_loaded;
int jl_eval_with_compiler_p(jl_expr_t *expr, int compileloops, jl_module_t *m);
void jl_trampoline_compile_function(jl_function_t *f, int always_infer, jl_tupletype_t *sig)
{
assert(f->linfo != NULL);
// to run inference on all thunks. slows down loading files.
// NOTE: if this call to inference is removed, type_annotate in inference.jl
// needs to be updated to infer inner functions.
if (f->linfo->inferred == 0) {
if (!jl_in_inference) {
if (!jl_is_expr(f->linfo->ast)) {
f->linfo->ast = jl_uncompress_ast(f->linfo, f->linfo->ast);
gc_wb(f->linfo, f->linfo->ast);
}
if (always_infer || jl_eval_with_compiler_p(jl_lam_body((jl_expr_t*)f->linfo->ast),1,f->linfo->module)) {
jl_type_infer(f->linfo, sig, f->linfo);
}
}
}
jl_compile(f);
// this assertion is probably not correct; the fptr could have been assigned
// by a recursive invocation from inference above.
//assert(f->fptr == &jl_trampoline);
jl_generate_fptr(f);
if (jl_boot_file_loaded && jl_is_expr(f->linfo->ast)) {
f->linfo->ast = jl_compress_ast(f->linfo, f->linfo->ast);
gc_wb(f->linfo, f->linfo->ast);
}
}
JL_CALLABLE(jl_trampoline)
{
assert(jl_is_func(F));
jl_function_t *f = (jl_function_t*)F;
jl_trampoline_compile_function(f, 0, jl_anytuple_type);
return jl_apply(f, args, nargs);
}
JL_CALLABLE(jl_f_instantiate_type)
{
JL_NARGSV(instantiate_type, 1);
if (!jl_is_datatype(args[0]))
JL_TYPECHK(instantiate_type, typector, args[0]);
if (args[0] == (jl_value_t*)jl_anytuple_type)
return (jl_value_t*)jl_apply_tuple_type_v(&args[1], nargs-1);
return jl_apply_type_(args[0], &args[1], nargs-1);
}
DLLEXPORT jl_value_t *jl_new_type_constructor(jl_svec_t *p, jl_value_t *t)
{
jl_value_t *tc = (jl_value_t*)jl_new_type_ctor(p, t);
int i;
for(i=0; i < jl_svec_len(p); i++)
((jl_tvar_t*)jl_svecref(p,i))->bound = 0;
return tc;
}
JL_CALLABLE(jl_f_union)
{
if (nargs == 0) return (jl_value_t*)jl_bottom_type;
if (nargs == 1) return args[0];
size_t i;
jl_svec_t *argt = jl_alloc_svec_uninit(nargs);
for(i=0; i < nargs; i++) {
if (!jl_is_type(args[i]) && !jl_is_typevar(args[i])) {
jl_error("invalid union type");
}
else {
jl_svecset(argt, i, args[i]);
}
}
JL_GC_PUSH1(&argt);
jl_value_t *u = jl_type_union(argt);
JL_GC_POP();
return u;