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symreg.c
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symreg.c
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/*
* Copyright (C) 2002-2010, Parrot Foundation.
*/
/*
=head1 NAME
compilers/imcc/symreg.c
=head1 DESCRIPTION
imcc symbol handling
XXX: SymReg stuff has become overused. SymReg should be for symbolic
registers, reg allocation, etc. but we are now using it for extensive
symbol table management. Need to convert much of this over the use Symbol
and SymbolTable (see symbol.h and symbol.c)
=head2 Functions
=over 4
=cut
*/
#include "imc.h"
/* Code: */
/* HEADERIZER HFILE: compilers/imcc/symreg.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg * _get_sym_typed(
ARGIN(const SymHash *hsh),
ARGIN(const char *name),
int t)
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char * _mk_fullname(PARROT_INTERP,
ARGIN_NULLOK(const Namespace *ns),
ARGIN(const char *name))
__attribute__nonnull__(1)
__attribute__nonnull__(3);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static SymReg * _mk_symreg(PARROT_INTERP,
ARGMOD(SymHash *hsh),
ARGIN(const char *name),
int t)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*hsh);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char * add_ns(PARROT_INTERP, ARGIN(const char *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg * get_sym_by_name(
ARGIN(const SymHash *hsh),
ARGIN(const char *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
static int int_overflows(ARGIN(const SymReg *r))
__attribute__nonnull__(1);
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static SymReg * mk_pmc_const_2(PARROT_INTERP,
ARGMOD(IMC_Unit *unit),
ARGIN(SymReg *left),
ARGMOD(SymReg *rhs))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*unit)
FUNC_MODIFIES(*rhs);
static void resize_symhash(PARROT_INTERP, ARGMOD(SymHash *hsh))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*hsh);
#define ASSERT_ARGS__get_sym_typed __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(hsh) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS__mk_fullname __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS__mk_symreg __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(hsh) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_add_ns __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_get_sym_by_name __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(hsh) \
, PARROT_ASSERT_ARG(name))
#define ASSERT_ARGS_int_overflows __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(r))
#define ASSERT_ARGS_mk_pmc_const_2 __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(unit) \
, PARROT_ASSERT_ARG(left) \
, PARROT_ASSERT_ARG(rhs))
#define ASSERT_ARGS_resize_symhash __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(hsh))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/*
=item C<void push_namespace(PARROT_INTERP, const char *name)>
Begins a new namespace in PASM/PIR, named after the given C<name>.
=cut
*/
void
push_namespace(PARROT_INTERP, ARGIN(const char *name))
{
ASSERT_ARGS(push_namespace)
Namespace * const ns = mem_gc_allocate_zeroed_typed(interp, Namespace);
ns->parent = IMCC_INFO(interp)->namespace_stack;
ns->name = mem_sys_strdup(name);
IMCC_INFO(interp)->namespace_stack = ns;
}
/*
=item C<void pop_namespace(PARROT_INTERP, const char *name)>
Ends the current namespace, popping back to the previous. If the namespace
stack is empty, throws a syntax error.
=cut
*/
void
pop_namespace(PARROT_INTERP, ARGIN(const char *name))
{
ASSERT_ARGS(pop_namespace)
Namespace * const ns = IMCC_INFO(interp)->namespace_stack;
if (!ns)
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR, "pop() on empty namespace stack\n");
if (name && !STREQ(name, ns->name))
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR, "tried to pop namespace(%s), "
"but top of stack is namespace(%s)\n", name, ns->name);
while (ns->idents) {
Identifier * const ident = ns->idents;
ns->idents = ident->next;
mem_sys_free(ident);
}
IMCC_INFO(interp)->namespace_stack = ns->parent;
mem_sys_free(ns);
}
/*
=item C<static SymReg * _get_sym_typed(const SymHash *hsh, const char *name, int
t)>
Gets a symbol from the hash, with the given C<name> of the specific type C<t>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg *
_get_sym_typed(ARGIN(const SymHash *hsh), ARGIN(const char *name), int t)
{
ASSERT_ARGS(_get_sym_typed)
SymReg *p;
const unsigned int i = hash_str(name) % hsh->size;
for (p = hsh->data[i]; p; p = p->next) {
if ((t == p->set) && STREQ(name, p->name))
return p;
}
return NULL;
}
/*
=item C<static SymReg * get_sym_by_name(const SymHash *hsh, const char *name)>
Gets a symbol from the hash, with the given C<name>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static SymReg *
get_sym_by_name(ARGIN(const SymHash *hsh), ARGIN(const char *name))
{
ASSERT_ARGS(get_sym_by_name)
SymReg *p;
const unsigned int i = hash_str(name) % hsh->size;
for (p = hsh->data[i]; p; p = p->next) {
if (STREQ(name, p->name))
return p;
}
return NULL;
}
/* symbolic registers */
/*
=item C<static SymReg * _mk_symreg(PARROT_INTERP, SymHash *hsh, const char
*name, int t)>
Makes a new SymReg in the given SymHash from a varname and type.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static SymReg *
_mk_symreg(PARROT_INTERP, ARGMOD(SymHash *hsh), ARGIN(const char *name), int t)
{
ASSERT_ARGS(_mk_symreg)
SymReg * r = _get_sym_typed(hsh, name, t);
if (!r) {
r = mem_gc_allocate_zeroed_typed(interp, SymReg);
r->set = t;
r->type = VTREG;
r->name = mem_sys_strdup(name);
r->color = -1;
r->want_regno = -1;
_store_symreg(interp, hsh, r);
}
return r;
}
/*
=item C<SymReg * mk_symreg(PARROT_INTERP, const char *name, int t)>
Makes a new SymReg in the current unit, given a varname and type.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_symreg(PARROT_INTERP, ARGIN(const char *name), int t)
{
ASSERT_ARGS(mk_symreg)
IMC_Unit * const unit = IMCC_INFO(interp)->cur_unit;
/* Check for the condition that fires up a segfault in TT #162 */
PARROT_ASSERT(unit != NULL);
return _mk_symreg(interp, &unit->hash, name, t);
}
/*
=item C<char * symreg_to_str(const SymReg *s)>
Dumps a SymReg to a printable format.
=cut
*/
PARROT_MALLOC
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
char *
symreg_to_str(ARGIN(const SymReg *s))
{
ASSERT_ARGS(symreg_to_str)
/* NOTE: the below magic number encompasses all the quoted strings which
* may be included in the sprintf output (for now) */
char * const buf = (char *)mem_sys_allocate(250 + strlen(s->name));
const int t = s->type;
sprintf(buf, "symbol [%s] set [%c] color [" INTVAL_FMT "] type [",
s->name, s->set, s->color);
if (t & VTCONST) { strcat(buf, "VTCONST "); }
if (t & VTREG) { strcat(buf, "VTREG "); }
if (t & VTIDENTIFIER) { strcat(buf, "VTIDENTIFIER "); }
if (t & VTADDRESS) { strcat(buf, "VTADDRESS "); }
if (t & VTREGKEY) { strcat(buf, "VTREGKEY "); }
if (t & VTPASM) { strcat(buf, "VTPASM "); }
if (t & VT_CONSTP) { strcat(buf, "VT_CONSTP "); }
if (t & VT_PCC_SUB) { strcat(buf, "VT_PCC_SUB "); }
if (t & VT_FLAT) { strcat(buf, "VT_FLAT "); }
if (t & VT_OPTIONAL) { strcat(buf, "VT_OPTIONAL "); }
if (t & VT_NAMED) { strcat(buf, "VT_NAMED "); }
if (t & VT_CALL_SIG) { strcat(buf, "VT_CALL_SIG "); }
strcat(buf, "]");
return buf;
}
/*
=item C<SymReg * mk_temp_reg(PARROT_INTERP, int t)>
Makes a new unique and temporary SymReg of the specified type C<t>.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_temp_reg(PARROT_INTERP, int t)
{
ASSERT_ARGS(mk_temp_reg)
char buf[30];
/* XXX non-reentrant */
static int temp;
snprintf(buf, sizeof (buf), "__imcc_temp_%d", ++temp);
return mk_symreg(interp, buf, t);
}
/*
=item C<SymReg * mk_pcc_sub(PARROT_INTERP, const char *name, int proto)>
Makes a SymReg representing a PCC sub of the given C<name> with the specified
type.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_pcc_sub(PARROT_INTERP, ARGIN(const char *name), int proto)
{
ASSERT_ARGS(mk_pcc_sub)
IMC_Unit * const unit = IMCC_INFO(interp)->cur_unit;
SymReg * const r = _mk_symreg(interp, &unit->hash, name, proto);
r->type = VT_PCC_SUB;
r->pcc_sub = mem_gc_allocate_zeroed_typed(interp, pcc_sub_t);
return r;
}
/*
=item C<void add_namespace(PARROT_INTERP, IMC_Unit *unit)>
Add the current namespace (and HLL id) to a sub declaration.
=cut
*/
void
add_namespace(PARROT_INTERP, ARGMOD(IMC_Unit *unit))
{
ASSERT_ARGS(add_namespace)
SymReg * const ns = IMCC_INFO(interp)->cur_namespace;
unit->hll_id = Parrot_pcc_get_HLL(interp, CURRENT_CONTEXT(interp));
if (!ns)
return;
if (unit->_namespace)
return;
if (unit->prev && unit->prev->_namespace == ns)
unit->_namespace = ns;
else {
SymReg * const g = dup_sym(interp, ns);
SymReg * const r = _get_sym(&IMCC_INFO(interp)->ghash, g->name);
unit->_namespace = g;
g->reg = ns;
g->type = VT_CONSTP;
/* this unit should free its namespace only if it's the only thing
* holding onto it */
if (!r || r->type != VT_CONSTP) {
_store_symreg(interp, &IMCC_INFO(interp)->ghash, g);
unit->owns_namespace = 0;
}
else
unit->owns_namespace = 1;
}
}
/*
=item C<void add_pcc_arg(PARROT_INTERP, SymReg *r, SymReg *arg)>
Adds a register or constant to the function arg list.
=cut
*/
void
add_pcc_arg(PARROT_INTERP, ARGMOD(SymReg *r), ARGMOD(SymReg *arg))
{
ASSERT_ARGS(add_pcc_arg)
pcc_sub_t * const sub = r->pcc_sub;
const int n = sub->nargs;
sub->args = mem_gc_realloc_n_typed(interp, sub->args, n + 1, SymReg *);
sub->arg_flags = mem_gc_realloc_n_typed(interp, sub->arg_flags, n + 1, int);
sub->args[n] = arg;
sub->arg_flags[n] = arg->type;
arg->type &= ~(VT_FLAT|VT_OPTIONAL|VT_OPT_FLAG|VT_NAMED|VT_CALL_SIG);
sub->nargs++;
}
/*
=item C<void add_pcc_result(PARROT_INTERP, SymReg *r, SymReg *arg)>
Adds a register or constant to the function's return list.
=cut
*/
void
add_pcc_result(PARROT_INTERP, ARGMOD(SymReg *r), ARGMOD(SymReg *arg))
{
ASSERT_ARGS(add_pcc_result)
pcc_sub_t * const sub = r->pcc_sub;
const int n = sub->nret;
sub->ret = mem_gc_realloc_n_typed(interp, sub->ret, n + 1, SymReg *);
sub->ret_flags = mem_gc_realloc_n_typed(interp, sub->ret_flags, n + 1, int);
/* we can't keep the flags in the SymReg as the SymReg
* maybe used with different flags for different calls */
sub->ret[n] = arg;
sub->ret_flags[n] = arg->type;
arg->type &= ~(VT_FLAT|VT_OPTIONAL|VT_OPT_FLAG|VT_NAMED);
sub->nret++;
}
/*
=item C<void add_pcc_multi(PARROT_INTERP, SymReg *r, SymReg *arg)>
Adds a :multi signature to the sub.
=cut
*/
void
add_pcc_multi(PARROT_INTERP, ARGMOD(SymReg *r), ARGIN_NULLOK(SymReg *arg))
{
ASSERT_ARGS(add_pcc_multi)
pcc_sub_t * const sub = r->pcc_sub;
const int n = sub->nmulti;
sub->multi = mem_gc_realloc_n_typed(interp, sub->multi, n + 1, SymReg *);
sub->multi[n] = arg;
sub->nmulti++;
}
/*
=item C<void add_pcc_sub(SymReg *r, SymReg *arg)>
Sets the current sub in the given SymReg to the second SymReg.
=cut
*/
void
add_pcc_sub(ARGMOD(SymReg *r), ARGIN(SymReg *arg))
{
ASSERT_ARGS(add_pcc_sub)
r->pcc_sub->sub = arg;
}
/*
=item C<void add_pcc_cc(SymReg *r, SymReg *arg)>
Adds a continuation (?) to the current sub.
=cut
*/
void
add_pcc_cc(ARGMOD(SymReg *r), ARGIN(SymReg *arg))
{
ASSERT_ARGS(add_pcc_cc)
r->pcc_sub->cc = arg;
}
/*
=item C<SymReg * mk_pasm_reg(PARROT_INTERP, const char *name)>
Makes a SymReg representing a PASM register.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_pasm_reg(PARROT_INTERP, ARGIN(const char *name))
{
ASSERT_ARGS(mk_pasm_reg)
SymReg *r = _get_sym(&IMCC_INFO(interp)->cur_unit->hash, name);
if (!r) {
r = mk_symreg(interp, name, *name);
r->type = VTPASM;
r->color = atoi(name + 1);
if (r->color < 0)
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR,
"register number out of range '%s'\n", name);
}
return r;
}
/*
=item C<static char * _mk_fullname(PARROT_INTERP, const Namespace *ns, const
char *name)>
Combines the namespace and name together, separated by a C<::>. If there's no
namespace, the name is returned on its own.
The returned string must be free()d.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char *
_mk_fullname(PARROT_INTERP, ARGIN_NULLOK(const Namespace *ns), ARGIN(const char *name))
{
ASSERT_ARGS(_mk_fullname)
if (ns) {
const size_t len = strlen(name) + strlen(ns->name) + 3;
char *result = mem_gc_allocate_n_typed(interp, len, char);
snprintf(result, len, "%s::%s", ns->name, name);
return result;
}
return mem_sys_strdup(name);
}
/*
=item C<SymReg * mk_ident(PARROT_INTERP, const char *name, int t, INTVAL type)>
Makes a new identifier.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_IGNORABLE_RESULT
SymReg *
mk_ident(PARROT_INTERP, ARGIN(const char *name), int t, INTVAL type)
{
ASSERT_ARGS(mk_ident)
char * const fullname = _mk_fullname(interp, IMCC_INFO(interp)->namespace_stack, name);
SymReg *r = get_sym_by_name(&(IMCC_INFO(interp)->cur_unit->hash), name);
if (r && (r->set != t || r->type != type))
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR,
"syntax error, duplicated IDENTIFIER '%s'\n", fullname);
r = mk_symreg(interp, fullname, t);
r->type = type;
if (IMCC_INFO(interp)->namespace_stack) {
Identifier * const ident = mem_gc_allocate_zeroed_typed(interp, Identifier);
ident->name = fullname;
ident->next = IMCC_INFO(interp)->namespace_stack->idents;
IMCC_INFO(interp)->namespace_stack->idents = ident;
}
else
mem_sys_free(fullname);
return r;
}
/*
=item C<static SymReg * mk_pmc_const_2(PARROT_INTERP, IMC_Unit *unit, SymReg
*left, SymReg *rhs)>
Makes a constant PMC and inserts instructions to access it.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
static SymReg *
mk_pmc_const_2(PARROT_INTERP, ARGMOD(IMC_Unit *unit), ARGIN(SymReg *left),
ARGMOD(SymReg *rhs))
{
ASSERT_ARGS(mk_pmc_const_2)
/* XXX This always returns NULL. Probably shouldn't return anything then. */
SymReg *r[3];
char *name;
int len;
if (IMCC_INFO(interp)->state->pasm_file)
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR,
"Ident as PMC constant %s\n", left->name);
r[0] = left;
/* strip delimiters */
name = mem_sys_strdup(rhs->name + 1);
len = strlen(name);
name[len - 1] = '\0';
mem_sys_free(rhs->name);
rhs->name = name;
rhs->set = 'P';
rhs->pmc_type = left->pmc_type;
switch (rhs->pmc_type) {
case enum_class_Sub:
case enum_class_Coroutine:
r[1] = rhs;
rhs->usage |= U_FIXUP;
INS(interp, unit, "set_p_pc", "", r, 2, 0, 1);
return NULL;
default:
break;
}
r[1] = rhs;
INS(interp, unit, "set_p_pc", "", r, 2, 0, 1);
return NULL;
}
/*
=item C<SymReg * mk_const_ident(PARROT_INTERP, const char *name, int t, SymReg
*val, int global)>
Makes a new identifier constant with value val.
=cut
*/
PARROT_CANNOT_RETURN_NULL
PARROT_IGNORABLE_RESULT
SymReg *
mk_const_ident(PARROT_INTERP, ARGIN(const char *name), int t,
ARGMOD(SymReg *val), int global)
{
ASSERT_ARGS(mk_const_ident)
SymReg *r;
/*
* Forbid assigning a string to anything other than a string
* or PMC constant
*/
if (t == 'N' || t == 'I') {
if (val->set == 'S')
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR, "bad const initialisation");
/* Cast value to const type */
val->set = t;
}
if (global) {
if (t == 'P')
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR,
"global PMC constant not allowed");
r = _mk_symreg(interp, &IMCC_INFO(interp)->ghash, name, t);
r->type = VT_CONSTP;
}
else {
r = mk_ident(interp, name, t, VT_CONSTP);
if (t == 'P')
return mk_pmc_const_2(interp, IMCC_INFO(interp)->cur_unit, r, val);
}
r->reg = val;
return r;
}
/*
=item C<SymReg * _mk_const(PARROT_INTERP, SymHash *hsh, const char *name, int
t)>
Makes a new constant (internal use only).
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
_mk_const(PARROT_INTERP, ARGMOD(SymHash *hsh), ARGIN(const char *name), int t)
{
ASSERT_ARGS(_mk_const)
SymReg * const r = _mk_symreg(interp, hsh, name, t);
r->type = VTCONST;
if (t == 'U') {
/* charset:"string" */
r->set = 'S';
r->type |= VT_ENCODED;
}
/* autopromote big ints to floats; fallout from
* http://rt.perl.org/rt3/Ticket/Display.html?id=53908
* */
if (t == 'I') {
if (int_overflows(r))
r->set = 'N';
}
r->use_count++;
return r;
}
/*
=item C<static int int_overflows(const SymReg *r)>
Determine whether an integer constant would overflow an C<INTVAL>
register.
=cut
*/
PARROT_WARN_UNUSED_RESULT
static int
int_overflows(ARGIN(const SymReg *r))
{
ASSERT_ARGS(int_overflows)
int base;
const char *digits;
if (r->type & VT_CONSTP)
r = r->reg;
/* Refactor this code to hoist common from functionality between
* this function and IMCC_int_from_reg in pbc.c */
digits = r->name;
base = 10;
if (digits[0] == '0') {
switch (toupper((unsigned char)digits[1])) {
case 'B': base = 2; break;
case 'O': base = 8; break;
case 'X': base = 16; break;
default: break;
}
}
errno = 0;
if (base == 10) {
long int unused = strtol(digits, NULL, base);
UNUSED(unused);
}
else {
unsigned long int unused = strtoul(digits + 2, NULL, base);
UNUSED(unused);
}
return errno ? 1 : 0;
}
/*
=item C<SymReg * mk_const(PARROT_INTERP, const char *name, int t)>
Makes a new constant (and populates the cache of global symbols).
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
mk_const(PARROT_INTERP, ARGIN(const char *name), int t)
{
ASSERT_ARGS(mk_const)
SymHash * const h = &IMCC_INFO(interp)->ghash;
if (!h->data)
create_symhash(interp, h);
return _mk_const(interp, h, name, t);
}
/*
=item C<static char * add_ns(PARROT_INTERP, const char *name)>
Adds a namespace to the current sub.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PARROT_MALLOC
static char *
add_ns(PARROT_INTERP, ARGIN(const char *name))
{
ASSERT_ARGS(add_ns)
size_t len, l;
char *ns_name, *p;
if (!IMCC_INFO(interp)->cur_namespace
|| (l = strlen(IMCC_INFO(interp)->cur_namespace->name)) <= 2)
return mem_sys_strdup(name);
/* TODO keyed syntax */
len = strlen(name) + l + 4;
ns_name = (char*)mem_sys_allocate(len);
strcpy(ns_name, IMCC_INFO(interp)->cur_namespace->name);
*ns_name = '_';
ns_name[l - 1] = '\0';
strcat(ns_name, "@@@");
strcat(ns_name, name);
p = strstr(ns_name, "\";\""); /* Foo";"Bar -> Foo@@@Bar */
while (p) {
p[0] = '@';
p[1] = '@';
p[2] = '@';
p = strstr(ns_name, "\";\")");
}
return ns_name;
}
/*
=item C<SymReg * _mk_address(PARROT_INTERP, SymHash *hsh, const char *name, int
uniq)>
Makes a new address (internal use only).
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
SymReg *
_mk_address(PARROT_INTERP, ARGMOD(SymHash *hsh), ARGIN(const char *name), int uniq)
{
ASSERT_ARGS(_mk_address)
SymReg *r;
if (uniq == U_add_all) {
int is_lexical = 0;
r = get_sym_by_name(&IMCC_INFO(interp)->ghash, name);
if (r && r->usage & U_LEXICAL)
is_lexical = 1;
r = mem_gc_allocate_zeroed_typed(interp, SymReg);
r->type = VTADDRESS;
r->name = mem_sys_strdup(name);
_store_symreg(interp, hsh, r);
if (is_lexical)
r->usage |= U_LEXICAL;
}
else {
/* Aux var to avoid the need of const casts */
char *aux_name = NULL;
const char * const sub_name = (uniq == U_add_uniq_sub)
/* remember to free this name; add_ns malloc()s it */
? (aux_name = add_ns(interp, name))
: name;
r = _get_sym(hsh, sub_name);
/* we use this for labels/subs */
if (uniq && r && r->type == VTADDRESS && r->lhs_use_count) {
if (uniq == U_add_uniq_label)
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR,
"Label '%s' already defined\n", sub_name);
else if (uniq == U_add_uniq_sub) {
mem_sys_free(aux_name);
IMCC_fataly(interp, EXCEPTION_SYNTAX_ERROR,
"Subroutine '%s' already defined\n", name);
}
}