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parser.c
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parser.c
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/*
* Copyright (C) 2012, 2013, 2014
* Wolfgang Bumiller
* Dale Weiler
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <string.h>
#include <math.h>
#include "parser.h"
#define PARSER_HT_LOCALS 2
#define PARSER_HT_SIZE 512
#define TYPEDEF_HT_SIZE 512
static void parser_enterblock(parser_t *parser);
static bool parser_leaveblock(parser_t *parser);
static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e);
static void parser_addglobal(parser_t *parser, const char *name, ast_expression *e);
static bool parse_typedef(parser_t *parser);
static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef, bool noref, bool is_static, uint32_t qflags, char *vstring);
static ast_block* parse_block(parser_t *parser);
static bool parse_block_into(parser_t *parser, ast_block *block);
static bool parse_statement_or_block(parser_t *parser, ast_expression **out);
static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases);
static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma, bool truthvalue, bool with_labels);
static ast_expression* parse_expression(parser_t *parser, bool stopatcomma, bool with_labels);
static ast_value* parser_create_array_setter_proto(parser_t *parser, ast_value *array, const char *funcname);
static ast_value* parser_create_array_getter_proto(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname);
static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef, bool *is_vararg);
static void parseerror(parser_t *parser, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vcompile_error(parser->lex->tok.ctx, fmt, ap);
va_end(ap);
}
/* returns true if it counts as an error */
static bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *fmt, ...)
{
bool r;
va_list ap;
va_start(ap, fmt);
r = vcompile_warning(parser->lex->tok.ctx, warntype, fmt, ap);
va_end(ap);
return r;
}
/**********************************************************************
* parsing
*/
static bool parser_next(parser_t *parser)
{
/* lex_do kills the previous token */
parser->tok = lex_do(parser->lex);
if (parser->tok == TOKEN_EOF)
return true;
if (parser->tok >= TOKEN_ERROR) {
parseerror(parser, "lex error");
return false;
}
return true;
}
#define parser_tokval(p) ((p)->lex->tok.value)
#define parser_token(p) (&((p)->lex->tok))
char *parser_strdup(const char *str)
{
if (str && !*str) {
/* actually dup empty strings */
char *out = (char*)mem_a(1);
*out = 0;
return out;
}
return util_strdup(str);
}
static ast_expression* parser_find_field(parser_t *parser, const char *name)
{
return ( ast_expression*)util_htget(parser->htfields, name);
}
static ast_expression* parser_find_label(parser_t *parser, const char *name)
{
size_t i;
for(i = 0; i < vec_size(parser->labels); i++)
if (!strcmp(parser->labels[i]->name, name))
return (ast_expression*)parser->labels[i];
return NULL;
}
ast_expression* parser_find_global(parser_t *parser, const char *name)
{
ast_expression *var = (ast_expression*)util_htget(parser->aliases, parser_tokval(parser));
if (var)
return var;
return (ast_expression*)util_htget(parser->htglobals, name);
}
static ast_expression* parser_find_param(parser_t *parser, const char *name)
{
size_t i;
ast_value *fun;
if (!parser->function)
return NULL;
fun = parser->function->vtype;
for (i = 0; i < vec_size(fun->expression.params); ++i) {
if (!strcmp(fun->expression.params[i]->name, name))
return (ast_expression*)(fun->expression.params[i]);
}
return NULL;
}
static ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto, bool *isparam)
{
size_t i, hash;
ast_expression *e;
hash = util_hthash(parser->htglobals, name);
*isparam = false;
for (i = vec_size(parser->variables); i > upto;) {
--i;
if ( (e = (ast_expression*)util_htgeth(parser->variables[i], name, hash)) )
return e;
}
*isparam = true;
return parser_find_param(parser, name);
}
static ast_expression* parser_find_var(parser_t *parser, const char *name)
{
bool dummy;
ast_expression *v;
v = parser_find_local(parser, name, 0, &dummy);
if (!v) v = parser_find_global(parser, name);
return v;
}
static ast_value* parser_find_typedef(parser_t *parser, const char *name, size_t upto)
{
size_t i, hash;
ast_value *e;
hash = util_hthash(parser->typedefs[0], name);
for (i = vec_size(parser->typedefs); i > upto;) {
--i;
if ( (e = (ast_value*)util_htgeth(parser->typedefs[i], name, hash)) )
return e;
}
return NULL;
}
typedef struct
{
size_t etype; /* 0 = expression, others are operators */
bool isparen;
size_t off;
ast_expression *out;
ast_block *block; /* for commas and function calls */
lex_ctx_t ctx;
} sy_elem;
enum {
PAREN_EXPR,
PAREN_FUNC,
PAREN_INDEX,
PAREN_TERNARY1,
PAREN_TERNARY2
};
typedef struct
{
sy_elem *out;
sy_elem *ops;
size_t *argc;
unsigned int *paren;
} shunt;
static sy_elem syexp(lex_ctx_t ctx, ast_expression *v) {
sy_elem e;
e.etype = 0;
e.off = 0;
e.out = v;
e.block = NULL;
e.ctx = ctx;
e.isparen = false;
return e;
}
static sy_elem syblock(lex_ctx_t ctx, ast_block *v) {
sy_elem e;
e.etype = 0;
e.off = 0;
e.out = (ast_expression*)v;
e.block = v;
e.ctx = ctx;
e.isparen = false;
return e;
}
static sy_elem syop(lex_ctx_t ctx, const oper_info *op) {
sy_elem e;
e.etype = 1 + (op - operators);
e.off = 0;
e.out = NULL;
e.block = NULL;
e.ctx = ctx;
e.isparen = false;
return e;
}
static sy_elem syparen(lex_ctx_t ctx, size_t off) {
sy_elem e;
e.etype = 0;
e.off = off;
e.out = NULL;
e.block = NULL;
e.ctx = ctx;
e.isparen = true;
return e;
}
/* With regular precedence rules, ent.foo[n] is the same as (ent.foo)[n],
* so we need to rotate it to become ent.(foo[n]).
*/
static bool rotate_entfield_array_index_nodes(ast_expression **out)
{
ast_array_index *index, *oldindex;
ast_entfield *entfield;
ast_value *field;
ast_expression *sub;
ast_expression *entity;
lex_ctx_t ctx = ast_ctx(*out);
if (!ast_istype(*out, ast_array_index))
return false;
index = (ast_array_index*)*out;
if (!ast_istype(index->array, ast_entfield))
return false;
entfield = (ast_entfield*)index->array;
if (!ast_istype(entfield->field, ast_value))
return false;
field = (ast_value*)entfield->field;
sub = index->index;
entity = entfield->entity;
oldindex = index;
index = ast_array_index_new(ctx, (ast_expression*)field, sub);
entfield = ast_entfield_new(ctx, entity, (ast_expression*)index);
*out = (ast_expression*)entfield;
oldindex->array = NULL;
oldindex->index = NULL;
ast_delete(oldindex);
return true;
}
static bool check_write_to(lex_ctx_t ctx, ast_expression *expr)
{
if (ast_istype(expr, ast_value)) {
ast_value *val = (ast_value*)expr;
if (val->cvq == CV_CONST) {
if (val->name[0] == '#') {
compile_error(ctx, "invalid assignment to a literal constant");
return false;
}
/*
* To work around quakeworld we must elide the error and make it
* a warning instead.
*/
if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_QCC)
compile_error(ctx, "assignment to constant `%s`", val->name);
else
(void)!compile_warning(ctx, WARN_CONST_OVERWRITE, "assignment to constant `%s`", val->name);
return false;
}
}
return true;
}
static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
{
const oper_info *op;
lex_ctx_t ctx;
ast_expression *out = NULL;
ast_expression *exprs[3];
ast_block *blocks[3];
ast_binstore *asbinstore;
size_t i, assignop, addop, subop;
qcint_t generated_op = 0;
char ty1[1024];
char ty2[1024];
if (!vec_size(sy->ops)) {
parseerror(parser, "internal error: missing operator");
return false;
}
if (vec_last(sy->ops).isparen) {
parseerror(parser, "unmatched parenthesis");
return false;
}
op = &operators[vec_last(sy->ops).etype - 1];
ctx = vec_last(sy->ops).ctx;
if (vec_size(sy->out) < op->operands) {
if (op->flags & OP_PREFIX)
compile_error(ctx, "expected expression after unary operator `%s`", op->op, (int)op->id);
else /* this should have errored previously already */
compile_error(ctx, "expected expression after operator `%s`", op->op, (int)op->id);
return false;
}
vec_shrinkby(sy->ops, 1);
/* op(:?) has no input and no output */
if (!op->operands)
return true;
vec_shrinkby(sy->out, op->operands);
for (i = 0; i < op->operands; ++i) {
exprs[i] = sy->out[vec_size(sy->out)+i].out;
blocks[i] = sy->out[vec_size(sy->out)+i].block;
if (exprs[i]->vtype == TYPE_NOEXPR &&
!(i != 0 && op->id == opid2('?',':')) &&
!(i == 1 && op->id == opid1('.')))
{
if (ast_istype(exprs[i], ast_label))
compile_error(ast_ctx(exprs[i]), "expected expression, got an unknown identifier");
else
compile_error(ast_ctx(exprs[i]), "not an expression");
(void)!compile_warning(ast_ctx(exprs[i]), WARN_DEBUG, "expression %u\n", (unsigned int)i);
}
}
if (blocks[0] && !vec_size(blocks[0]->exprs) && op->id != opid1(',')) {
compile_error(ctx, "internal error: operator cannot be applied on empty blocks");
return false;
}
#define NotSameType(T) \
(exprs[0]->vtype != exprs[1]->vtype || \
exprs[0]->vtype != T)
switch (op->id)
{
default:
compile_error(ctx, "internal error: unhandled operator: %s (%i)", op->op, (int)op->id);
return false;
case opid1('.'):
if (exprs[0]->vtype == TYPE_VECTOR &&
exprs[1]->vtype == TYPE_NOEXPR)
{
if (exprs[1] == (ast_expression*)parser->const_vec[0])
out = (ast_expression*)ast_member_new(ctx, exprs[0], 0, NULL);
else if (exprs[1] == (ast_expression*)parser->const_vec[1])
out = (ast_expression*)ast_member_new(ctx, exprs[0], 1, NULL);
else if (exprs[1] == (ast_expression*)parser->const_vec[2])
out = (ast_expression*)ast_member_new(ctx, exprs[0], 2, NULL);
else {
compile_error(ctx, "access to invalid vector component");
return false;
}
}
else if (exprs[0]->vtype == TYPE_ENTITY) {
if (exprs[1]->vtype != TYPE_FIELD) {
compile_error(ast_ctx(exprs[1]), "type error: right hand of member-operand should be an entity-field");
return false;
}
out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
}
else if (exprs[0]->vtype == TYPE_VECTOR) {
compile_error(ast_ctx(exprs[1]), "vectors cannot be accessed this way");
return false;
}
else {
compile_error(ast_ctx(exprs[1]), "type error: member-of operator on something that is not an entity or vector");
return false;
}
break;
case opid1('['):
if (exprs[0]->vtype != TYPE_ARRAY &&
!(exprs[0]->vtype == TYPE_FIELD &&
exprs[0]->next->vtype == TYPE_ARRAY))
{
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "cannot index value of type %s", ty1);
return false;
}
if (exprs[1]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[1]), "index must be of type float, not %s", ty1);
return false;
}
out = (ast_expression*)ast_array_index_new(ctx, exprs[0], exprs[1]);
if (rotate_entfield_array_index_nodes(&out))
{
#if 0
/* This is not broken in fteqcc anymore */
if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
/* this error doesn't need to make us bail out */
(void)!parsewarning(parser, WARN_EXTENSIONS,
"accessing array-field members of an entity without parenthesis\n"
" -> this is an extension from -std=gmqcc");
}
#endif
}
break;
case opid1(','):
if (vec_size(sy->paren) && vec_last(sy->paren) == PAREN_FUNC) {
vec_push(sy->out, syexp(ctx, exprs[0]));
vec_push(sy->out, syexp(ctx, exprs[1]));
vec_last(sy->argc)++;
return true;
}
if (blocks[0]) {
if (!ast_block_add_expr(blocks[0], exprs[1]))
return false;
} else {
blocks[0] = ast_block_new(ctx);
if (!ast_block_add_expr(blocks[0], exprs[0]) ||
!ast_block_add_expr(blocks[0], exprs[1]))
{
return false;
}
}
ast_block_set_type(blocks[0], exprs[1]);
vec_push(sy->out, syblock(ctx, blocks[0]));
return true;
case opid2('+','P'):
out = exprs[0];
break;
case opid2('-','P'):
if ((out = fold_op(parser->fold, op, exprs)))
break;
if (exprs[0]->vtype != TYPE_FLOAT &&
exprs[0]->vtype != TYPE_VECTOR) {
compile_error(ctx, "invalid types used in unary expression: cannot negate type %s",
type_name[exprs[0]->vtype]);
return false;
}
if (exprs[0]->vtype == TYPE_FLOAT)
out = (ast_expression*)ast_unary_new(ctx, VINSTR_NEG_F, exprs[0]);
else
out = (ast_expression*)ast_unary_new(ctx, VINSTR_NEG_V, exprs[0]);
break;
case opid2('!','P'):
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
break;
case TYPE_VECTOR:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[0]);
break;
case TYPE_STRING:
if (OPTS_FLAG(TRUE_EMPTY_STRINGS))
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
else
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[0]);
break;
/* we don't constant-fold NOT for these types */
case TYPE_ENTITY:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_ENT, exprs[0]);
break;
case TYPE_FUNCTION:
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_FNC, exprs[0]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot logically negate type %s",
type_name[exprs[0]->vtype]);
return false;
}
}
break;
case opid1('+'):
if (exprs[0]->vtype != exprs[1]->vtype ||
(exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT) )
{
compile_error(ctx, "invalid types used in expression: cannot add type %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = fold_binary(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
out = fold_binary(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot add type %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
}
break;
case opid1('-'):
if (exprs[0]->vtype != exprs[1]->vtype ||
(exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT))
{
compile_error(ctx, "invalid types used in expression: cannot subtract type %s from %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
out = fold_binary(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
out = fold_binary(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot subtract type %s from %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
}
break;
case opid1('*'):
if (exprs[0]->vtype != exprs[1]->vtype &&
!(exprs[0]->vtype == TYPE_VECTOR &&
exprs[1]->vtype == TYPE_FLOAT) &&
!(exprs[1]->vtype == TYPE_VECTOR &&
exprs[0]->vtype == TYPE_FLOAT)
)
{
compile_error(ctx, "invalid types used in expression: cannot multiply types %s and %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
switch (exprs[0]->vtype) {
case TYPE_FLOAT:
if (exprs[1]->vtype == TYPE_VECTOR)
out = fold_binary(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
else
out = fold_binary(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
break;
case TYPE_VECTOR:
if (exprs[1]->vtype == TYPE_FLOAT)
out = fold_binary(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
else
out = fold_binary(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
break;
default:
compile_error(ctx, "invalid types used in expression: cannot multiply types %s and %s",
type_name[exprs[1]->vtype],
type_name[exprs[0]->vtype]);
return false;
}
}
break;
case opid1('/'):
if (exprs[1]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: cannot divide types %s and %s", ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
if (exprs[0]->vtype == TYPE_FLOAT)
out = fold_binary(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
else {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in expression: cannot divide types %s and %s", ty1, ty2);
return false;
}
}
break;
case opid1('%'):
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform modulo operation between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
} else if (!(out = fold_op(parser->fold, op, exprs))) {
/* generate a call to __builtin_mod */
ast_expression *mod = intrin_func(parser->intrin, "mod");
ast_call *call = NULL;
if (!mod) return false; /* can return null for missing floor */
call = ast_call_new(parser_ctx(parser), mod);
vec_push(call->params, exprs[0]);
vec_push(call->params, exprs[1]);
out = (ast_expression*)call;
}
break;
case opid2('%','='):
compile_error(ctx, "%= is unimplemented");
return false;
case opid1('|'):
case opid1('&'):
case opid1('^'):
if ( !(exprs[0]->vtype == TYPE_FLOAT && exprs[1]->vtype == TYPE_FLOAT) &&
!(exprs[0]->vtype == TYPE_VECTOR && exprs[1]->vtype == TYPE_FLOAT) &&
!(exprs[0]->vtype == TYPE_VECTOR && exprs[1]->vtype == TYPE_VECTOR))
{
compile_error(ctx, "invalid types used in expression: cannot perform bit operations between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
/*
* IF the first expression is float, the following will be too
* since scalar ^ vector is not allowed.
*/
if (exprs[0]->vtype == TYPE_FLOAT) {
out = fold_binary(ctx,
(op->id == opid1('^') ? VINSTR_BITXOR : op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
exprs[0], exprs[1]);
} else {
/*
* The first is a vector: vector is allowed to bitop with vector and
* with scalar, branch here for the second operand.
*/
if (exprs[1]->vtype == TYPE_VECTOR) {
/*
* Bitop all the values of the vector components against the
* vectors components in question.
*/
out = fold_binary(ctx,
(op->id == opid1('^') ? VINSTR_BITXOR_V : op->id == opid1('|') ? VINSTR_BITOR_V : VINSTR_BITAND_V),
exprs[0], exprs[1]);
} else {
out = fold_binary(ctx,
(op->id == opid1('^') ? VINSTR_BITXOR_VF : op->id == opid1('|') ? VINSTR_BITOR_VF : VINSTR_BITAND_VF),
exprs[0], exprs[1]);
}
}
}
break;
case opid2('<','<'):
case opid2('>','>'):
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform shift between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
ast_expression *shift = intrin_func(parser->intrin, (op->id == opid2('<','<')) ? "__builtin_lshift" : "__builtin_rshift");
ast_call *call = ast_call_new(parser_ctx(parser), shift);
vec_push(call->params, exprs[0]);
vec_push(call->params, exprs[1]);
out = (ast_expression*)call;
}
break;
case opid3('<','<','='):
case opid3('>','>','='):
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform shift operation between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if(!(out = fold_op(parser->fold, op, exprs))) {
ast_expression *shift = intrin_func(parser->intrin, (op->id == opid3('<','<','=')) ? "__builtin_lshift" : "__builtin_rshift");
ast_call *call = ast_call_new(parser_ctx(parser), shift);
vec_push(call->params, exprs[0]);
vec_push(call->params, exprs[1]);
out = (ast_expression*)ast_store_new(
parser_ctx(parser),
INSTR_STORE_F,
exprs[0],
(ast_expression*)call
);
}
break;
case opid2('|','|'):
generated_op += 1; /* INSTR_OR */
case opid2('&','&'):
generated_op += INSTR_AND;
if (!(out = fold_op(parser->fold, op, exprs))) {
if (OPTS_FLAG(PERL_LOGIC) && !ast_compare_type(exprs[0], exprs[1])) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types for logical operation with -fperl-logic: %s and %s", ty1, ty2);
return false;
}
for (i = 0; i < 2; ++i) {
if (OPTS_FLAG(CORRECT_LOGIC) && exprs[i]->vtype == TYPE_VECTOR) {
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[i]);
if (!out) break;
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, out);
if (!out) break;
exprs[i] = out; out = NULL;
if (OPTS_FLAG(PERL_LOGIC)) {
/* here we want to keep the right expressions' type */
break;
}
}
else if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && exprs[i]->vtype == TYPE_STRING) {
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[i]);
if (!out) break;
out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, out);
if (!out) break;
exprs[i] = out; out = NULL;
if (OPTS_FLAG(PERL_LOGIC)) {
/* here we want to keep the right expressions' type */
break;
}
}
}
out = fold_binary(ctx, generated_op, exprs[0], exprs[1]);
}
break;
case opid2('?',':'):
if (vec_last(sy->paren) != PAREN_TERNARY2) {
compile_error(ctx, "mismatched parenthesis/ternary");
return false;
}
vec_pop(sy->paren);
if (!ast_compare_type(exprs[1], exprs[2])) {
ast_type_to_string(exprs[1], ty1, sizeof(ty1));
ast_type_to_string(exprs[2], ty2, sizeof(ty2));
compile_error(ctx, "operands of ternary expression must have the same type, got %s and %s", ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = (ast_expression*)ast_ternary_new(ctx, exprs[0], exprs[1], exprs[2]);
break;
case opid2('*', '*'):
if (NotSameType(TYPE_FLOAT)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in exponentiation: %s and %s",
ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
ast_call *gencall = ast_call_new(parser_ctx(parser), intrin_func(parser->intrin, "pow"));
vec_push(gencall->params, exprs[0]);
vec_push(gencall->params, exprs[1]);
out = (ast_expression*)gencall;
}
break;
case opid2('>', '<'):
if (NotSameType(TYPE_VECTOR)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in cross product: %s and %s",
ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
out = fold_binary(
parser_ctx(parser),
VINSTR_CROSS,
exprs[0],
exprs[1]
);
}
break;
case opid3('<','=','>'): /* -1, 0, or 1 */
if (NotSameType(TYPE_FLOAT)) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types used in comparision: %s and %s",
ty1, ty2);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs))) {
/* This whole block is NOT fold_binary safe */
ast_binary *eq = ast_binary_new(ctx, INSTR_EQ_F, exprs[0], exprs[1]);
eq->refs = AST_REF_NONE;
/* if (lt) { */
out = (ast_expression*)ast_ternary_new(ctx,
(ast_expression*)ast_binary_new(ctx, INSTR_LT, exprs[0], exprs[1]),
/* out = -1 */
(ast_expression*)parser->fold->imm_float[2],
/* } else { */
/* if (eq) { */
(ast_expression*)ast_ternary_new(ctx, (ast_expression*)eq,
/* out = 0 */
(ast_expression*)parser->fold->imm_float[0],
/* } else { */
/* out = 1 */
(ast_expression*)parser->fold->imm_float[1]
/* } */
)
/* } */
);
}
break;
case opid1('>'):
generated_op += 1; /* INSTR_GT */
case opid1('<'):
generated_op += 1; /* INSTR_LT */
case opid2('>', '='):
generated_op += 1; /* INSTR_GE */
case opid2('<', '='):
generated_op += INSTR_LE;
if (NotSameType(TYPE_FLOAT)) {
compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = fold_binary(ctx, generated_op, exprs[0], exprs[1]);
break;
case opid2('!', '='):
if (exprs[0]->vtype != exprs[1]->vtype) {
compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = fold_binary(ctx, type_ne_instr[exprs[0]->vtype], exprs[0], exprs[1]);
break;
case opid2('=', '='):
if (exprs[0]->vtype != exprs[1]->vtype) {
compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
type_name[exprs[0]->vtype],
type_name[exprs[1]->vtype]);
return false;
}
if (!(out = fold_op(parser->fold, op, exprs)))
out = fold_binary(ctx, type_eq_instr[exprs[0]->vtype], exprs[0], exprs[1]);
break;
case opid1('='):
if (ast_istype(exprs[0], ast_entfield)) {
ast_expression *field = ((ast_entfield*)exprs[0])->field;
if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
exprs[0]->vtype == TYPE_FIELD &&
exprs[0]->next->vtype == TYPE_VECTOR)
{
assignop = type_storep_instr[TYPE_VECTOR];
}
else
assignop = type_storep_instr[exprs[0]->vtype];
if (assignop == VINSTR_END || !ast_compare_type(field->next, exprs[1]))
{
ast_type_to_string(field->next, ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
if (OPTS_FLAG(ASSIGN_FUNCTION_TYPES) &&
field->next->vtype == TYPE_FUNCTION &&
exprs[1]->vtype == TYPE_FUNCTION)
{
(void)!compile_warning(ctx, WARN_ASSIGN_FUNCTION_TYPES,
"invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
else
compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
}
else
{
if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
exprs[0]->vtype == TYPE_FIELD &&
exprs[0]->next->vtype == TYPE_VECTOR)
{
assignop = type_store_instr[TYPE_VECTOR];
}
else {
assignop = type_store_instr[exprs[0]->vtype];
}
if (assignop == VINSTR_END) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
else if (!ast_compare_type(exprs[0], exprs[1]))
{
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
ast_type_to_string(exprs[1], ty2, sizeof(ty2));
if (OPTS_FLAG(ASSIGN_FUNCTION_TYPES) &&
exprs[0]->vtype == TYPE_FUNCTION &&
exprs[1]->vtype == TYPE_FUNCTION)
{
(void)!compile_warning(ctx, WARN_ASSIGN_FUNCTION_TYPES,
"invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
else
compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
}
}
(void)check_write_to(ctx, exprs[0]);
out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
break;
case opid3('+','+','P'):
case opid3('-','-','P'):
/* prefix ++ */
if (exprs[0]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "invalid type for prefix increment: %s", ty1);
return false;
}
if (op->id == opid3('+','+','P'))
addop = INSTR_ADD_F;
else
addop = INSTR_SUB_F;
(void)check_write_to(ast_ctx(exprs[0]), exprs[0]);
if (ast_istype(exprs[0], ast_entfield)) {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);
} else {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);
}
break;
case opid3('S','+','+'):
case opid3('S','-','-'):
/* prefix ++ */
if (exprs[0]->vtype != TYPE_FLOAT) {
ast_type_to_string(exprs[0], ty1, sizeof(ty1));
compile_error(ast_ctx(exprs[0]), "invalid type for suffix increment: %s", ty1);
return false;
}
if (op->id == opid3('S','+','+')) {
addop = INSTR_ADD_F;
subop = INSTR_SUB_F;
} else {
addop = INSTR_SUB_F;
subop = INSTR_ADD_F;
}
(void)check_write_to(ast_ctx(exprs[0]), exprs[0]);
if (ast_istype(exprs[0], ast_entfield)) {
out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
exprs[0],
(ast_expression*)parser->fold->imm_float[1]);