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translate-c: Parse float/double literals

master
LemonBoy 2019-04-16 20:43:08 +02:00
parent 1fda44cbc8
commit 6d95c5d15c
1 changed files with 23 additions and 2 deletions
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25
src/translate_c.cpp
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@ -522,7 +522,18 @@ static AstNode *trans_create_node_apint(Context *c, const ZigClangAPSInt *aps_in
ZigClangAPSInt_getNumWords(negated), true);
ZigClangAPSInt_free(negated);
return node;
}
static AstNode *trans_create_node_apfloat(Context *c, const llvm::APFloat &ap_float) {
uint8_t buf[128];
size_t written = ap_float.convertToHexString((char *)buf, 0, false,
llvm::APFloat::rmNearestTiesToEven);
AstNode *node = trans_create_node(c, NodeTypeFloatLiteral);
node->data.float_literal.bigfloat = allocate<BigFloat>(1);
if (bigfloat_init_buf(node->data.float_literal.bigfloat, buf, written)) {
node->data.float_literal.overflow = true;
}
return node;
}
static const ZigClangType *qual_type_canon(ZigClangQualType qt) {
@ -1313,6 +1324,16 @@ static AstNode *trans_integer_literal(Context *c, ResultUsed result_used, const
return maybe_suppress_result(c, result_used, node);
}
static AstNode *trans_floating_literal(Context *c, ResultUsed result_used, const clang::FloatingLiteral *stmt) {
llvm::APFloat result{0.0f};
if (!stmt->EvaluateAsFloat(result, *reinterpret_cast<clang::ASTContext *>(c->ctx))) {
emit_warning(c, bitcast(stmt->getBeginLoc()), "invalid floating literal");
return nullptr;
}
AstNode *node = trans_create_node_apfloat(c, result);
return maybe_suppress_result(c, result_used, node);
}
static AstNode *trans_constant_expr(Context *c, ResultUsed result_used, const clang::ConstantExpr *expr) {
clang::Expr::EvalResult result;
if (!expr->EvaluateAsConstantExpr(result, clang::Expr::EvaluateForCodeGen,
@ -3549,8 +3570,8 @@ static int trans_stmt_extra(Context *c, TransScope *scope, const ZigClangStmt *s
emit_warning(c, ZigClangStmt_getBeginLoc(stmt), "TODO handle C FixedPointLiteralClass");
return ErrorUnexpected;
case ZigClangStmt_FloatingLiteralClass:
emit_warning(c, ZigClangStmt_getBeginLoc(stmt), "TODO handle C FloatingLiteralClass");
return ErrorUnexpected;
return wrap_stmt(out_node, out_child_scope, scope,
trans_floating_literal(c, result_used, (const clang::FloatingLiteral *)stmt));
case ZigClangStmt_ExprWithCleanupsClass:
emit_warning(c, ZigClangStmt_getBeginLoc(stmt), "TODO handle C ExprWithCleanupsClass");
return ErrorUnexpected;