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|
struct Scope {
~uint8 name,
~Module mod,
~CompBuf cb,
~Scope parent,
utils.Vector vars,
int unique
}
/; _recursive_mod_name(~Module mod, ~utils.Vector vec)
~Module p = mod`.parent
/; if (p !== NULL)
_recursive_mod_name(p, vec)
/; if (vec`.count !== 0)
vec`.push_char('.')
;/
;/
vec`.push_cstr(mod`.name)
;/
/; _recursive_scope_name(~Scope s, ~utils.Vector vec)
~void p = s`.parent
/; if (p == NULL)
~void m = s`.mod
/; if (m !== NULL)
_recursive_mod_name(m, vec)
/; if (vec`.count > 0)
vec`.push_char('.')
;/
;/
;; else
_recursive_scope_name(p, vec)
;/
vec`.push_cstr(s`.name)
;/
/; method Scope
/; init (~Module mod, ~CompBuf cb, ~uint8 name)
self.name = utils.strcpy(name)
self.mod = mod
self.cb = cb
self.parent = NULL
self.unique = 0
Var v
self.vars.init(len v)
;/
/; end
_delete(self.name)
~Var v
/; loop (int i = 0; i < self.vars.count) [i++]
v = self.vars.get(i)
v`.end()
;/
self.vars.end()
;/
#
# Make variables
#
/; _next_reg_slot [int]
int out = 11
/; if (self.parent !== NULL)
out = self.parent`._next_reg_slot()
;/
/; if (out < 0)
return out
;/
~Var v
/; loop (int i = 0; i < self.vars.count) [i++]
v = self.vars.get(i)
/; if (v`.loc > 0)
out++
/; if (out > 16)
return 0 - 1
;/
;/
;/
return out
;/
/; _next_stack_slot [int]
int out = 0 - 56
/; if (self.parent !== NULL)
out = self.parent`._next_stack_slot()
;/
~Var v
/; loop (int i = 0; i < self.vars.count) [i++]
v = self.vars.get(i)
/; if (v`.loc < 0)
out = out - v`.actual_size()
;/
;/
return out
;/
/; mk_aware (~Var v)
Var mk = v`.copy()
mk.offset = 0
# TODO: Make sure this works properly
/; if (mk.loc > 0)
mk.loc = 1
;/
self.vars.push(~mk)
;/
/; mk_aware_node (~parse.Node n)
~parse.Node sub
~parse.Node tp = NULL
/; loop (int i = 0; i < n`.sub.count) [i++]
sub = n`.sub.get(i)
/; if (n`._type == parse.NTYPE_TYPE)
tp = n
;; else if (n`._type == parse.NTYPE_ID)
/; if (tp == NULL)
_printf("COMPILER ERROR: Should have type node before first id in decl node\n\0")
return
;/
# Part 1: Add var
Var v
v.init(tp, n`.data)
# TODO: Make sure this works properly
/; if (v.regable() == true)
v.loc = 0 - 1
;; else
v.loc = 1
;/
v.offset = 0
self.vars.push(~v)
# Part 2: Compute via value (if exists)
/; if (n`.sub.count > 0)
n = n`.sub.get(0)
/; if (n`._type == parse.NTYPE_VALUE)
self.precheck_stmt(n)
;/
;/
;/
;/
;/
/; precheck_stmt (~parse.Node n)
;/
/; find_var (~uint8 name) [~Var]
~Var v
/; loop (int i = 0; i < self.vars.count) [i++]
v = self.vars.get(i)
/; if (utils.strcmp(v`.name, name) == true)
return v
;/
;/
/; if (self.parent !== NULL)
return self.parent`.find_var(name)
;/
return NULL
;/
/; mk_set_var (~Var src)
Var out = src`.copy()
/; if (src`.regable() == true)
out.loc = self._next_reg_slot()
/; if (out.loc + 1 == 0)
out.offset = self._next_stack_slot()
;/
;; else
out.loc = 0 - 1
out.offset = self._next_stack_slot()
;/
~int32 p = out.top_ptrc()
/; if (p == NULL)
out.set(self.cb, src)
;; else if (p` == 0)
out.set_ref(self.cb, src)
;; else
out.set(self.cb, src)
;/
self.vars.push(~out)
;/
#
# Sub scope
#
/; mk_sub (~uint8 name) [Scope]
Scope out
out.init(self.mod, self.cb, name)
out.parent = ~self
return out
;/
# Generate a garantueed unique name for the sub scope, using
# the provided name as a base
/; gen_sub(~uint8 name) [Scope]
utils.Vector true_name
true_name.init(1)
# Append a 'unique' number
~uint8 u = utils.int_to_str(self.unique)
true_name.push_char('#')
true_name.push_cstr(u)
true_name.push_char('#')
true_name.push_cstr(name)
_delete(u)
Scope out = self.mk_sub(true_name.as_cstr())
true_name.end()
# Inc for subsequent names
self.unique++
return out
;/
#
# Label generation
#
/; _base_label [utils.Vector]
utils.Vector out
out.init(1)
_recursive_scope_name(~self, ~out)
return out
;/
/; base_label [~uint8]
utils.Vector v = self._base_label()
return v.as_cstr()
;/
/; place_base_label
~uint8 bl = self.base_label()
self.cb`.add_c(bl)
self.cb`.add_c(":\n\0")
_delete(bl)
;/
/; start_label [~uint8]
utils.Vector v = self._base_label()
v.push_cstr("#start\0")
return v.as_cstr()
;/
/; place_start_label
~uint8 sl = self.start_label()
self.cb`.add_c(sl)
self.cb`.add_c(":\n\0")
_delete(sl)
;/
/; rep_label [~uint8]
utils.Vector v = self._base_label()
v.push_cstr("#rep\0")
return v.as_cstr()
;/
/; place_rep_label
~uint8 rl = self.rep_label()
self.cb`.add_c(rl)
self.cb`.add_c(":\n\0")
_delete(rl)
;/
/; end_label [~uint8]
utils.Vector v = self._base_label()
v.push_cstr("#end\0")
return v.as_cstr()
;/
/; place_end_label
~uint8 el = self.end_label()
self.cb`.add_c(el)
self.cb`.add_c(":\n\0")
_delete(el)
;/
;/
|
