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[qfcc] Add functions to store and load values

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This makes working with constant expressions much less tedious,
especially when the relevant code needs to work with many types.
This commit is contained in:
Bill Currie 2022-04-27 21:24:46 +09:00
parent 875c9bde7c
commit c120bf2940
2 changed files with 44 additions and 0 deletions
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5
tools/qfcc/include/value.h
View file

@ -40,6 +40,7 @@ struct def_s;
struct ex_value_s;
struct tempop_s;
struct type_s;
struct pr_type_s;
struct ex_value_s *new_string_val (const char *string_val);
struct ex_value_s *new_double_val (double double_val);
@ -57,6 +58,10 @@ struct ex_value_s *new_int_val (int int_val);
struct ex_value_s *new_uint_val (int uint_val);
struct ex_value_s *new_short_val (short short_val);
struct ex_value_s *new_nil_val (struct type_s *type);
struct ex_value_s *new_type_value (const struct type_s *type,
const struct pr_type_s *data);
void value_store (pr_type_t *dst, const struct type_s *dstType,
const struct expr_s *src);
struct ex_value_s *convert_value (struct ex_value_s *value,
struct type_s *type);

39
tools/qfcc/source/value.c
View file

@ -269,6 +269,45 @@ new_nil_val (type_t *type)
return find_value (&val);
}
ex_value_t *
new_type_value (const type_t *type, const pr_type_t *data)
{
size_t typeSize = type_size (type) * sizeof (pr_type_t);
ex_value_t val = {};
set_val_type (&val, (type_t *) type);//FIXME cast
memcpy (&val.v, data, typeSize);
return find_value (&val);
}
void
value_store (pr_type_t *dst, const type_t *dstType, const expr_t *src)
{
size_t dstSize = type_size (dstType) * sizeof (pr_type_t);
if (src->type == ex_nil) {
memset (dst, 0, dstSize);
return;
}
if (src->type == ex_symbol && src->e.symbol->sy_type == sy_var) {
// initialized global def treated as a constant
// from the tests in cast_expr, the def is known to be constant
def_t *def = src->e.symbol->s.def;
memcpy (dst, &D_PACKED (pr_type_t, def), dstSize);
return;
}
ex_value_t *val = 0;
if (src->type == ex_value) {
val = src->e.value;
}
if (src->type == ex_symbol && src->e.symbol->sy_type == sy_const) {
val = src->e.symbol->s.value;
}
if (!val) {
internal_error (src, "unexpected constant expression type");
}
memcpy (dst, &val->v, dstSize);
}
static hashtab_t *string_imm_defs;
static hashtab_t *float_imm_defs;
static hashtab_t *vector_imm_defs;