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[util] Support casts from int/uint to size_t 

I don't want to do implicit down casts (size_t to uint) but I needed to
be able to reference swapchain array size.
This commit is contained in:
Bill Currie 2021-01-10 15:27:39 +09:00
parent ef817a5cbf
commit fd07169a80
1 changed files with 23 additions and 0 deletions
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23
libs/util/cexpr-type.c
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@ -31,6 +31,7 @@
#include "QF/cexpr.h"
#include "QF/mathlib.h"
#include "QF/qfplist.h"
#include "QF/simd/vec4f.h"
#include "libs/util/cexpr-parse.h"
@ -181,6 +182,26 @@ BINOP(size_t, bor, unsigned, |)
BINOP(size_t, xor, unsigned, ^)
BINOP(size_t, rem, unsigned, %)
static void
size_t_cast_int (const exprval_t *val1, const exprval_t *src,
exprval_t *result, exprctx_t *ctx)
{
int val = *(int *) src->value;
if (val < 0) {
PL_Message (ctx->messages, ctx->item, "int value clamped to 0: %d",
val);
val = 0;
}
*(size_t *) result->value = val;
}
static void
size_t_cast_uint (const exprval_t *val1, const exprval_t *src,
exprval_t *result, exprctx_t *ctx)
{
*(size_t *) result->value = *(unsigned *) src->value;
}
UNOP(size_t, pos, unsigned, +)
UNOP(size_t, neg, unsigned, -)
UNOP(size_t, tnot, unsigned, !)
@ -198,6 +219,8 @@ binop_t size_t_binops[] = {
{ '^', &cexpr_size_t, &cexpr_size_t, size_t_xor },
{ '%', &cexpr_size_t, &cexpr_size_t, size_t_rem },
{ MOD, &cexpr_size_t, &cexpr_size_t, size_t_rem },
{ '=', &cexpr_int, &cexpr_size_t, size_t_cast_int },
{ '=', &cexpr_uint, &cexpr_size_t, size_t_cast_uint },
{}
};