return v;
}
+#if 0
typedef struct {
MEM_VECTOR_MAKE(ast_value*, p);
} paramlist_t;
MEM_VECTOR_CLEAR(¶ms, p);
return NULL;
}
+#endif
typedef struct
{
return false;
}
+typedef struct {
+ MEM_VECTOR_MAKE(ast_value*, p);
+} paramlist_t;
+MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
+
+static ast_value *parse_typename(parser_t *parser, ast_value **storebase);
+static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
+{
+ lex_ctx ctx;
+ size_t i;
+ paramlist_t params;
+ ast_value *param;
+ ast_value *fval;
+ bool first = true;
+ bool variadic = false;
+
+ ctx = parser_ctx(parser);
+
+ /* for the sake of less code we parse-in in this function */
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected parameter list");
+ return NULL;
+ }
+
+ MEM_VECTOR_INIT(¶ms, p);
+
+ /* parse variables until we hit a closing paren */
+ while (parser->tok != ')') {
+ if (!first) {
+ /* there must be commas between them */
+ if (parser->tok != ',') {
+ parseerror(parser, "expected comma or end of parameter list");
+ goto on_error;
+ }
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected parameter");
+ goto on_error;
+ }
+ }
+ first = false;
+
+ if (parser->tok == TOKEN_DOTS) {
+ /* '...' indicates a varargs function */
+ variadic = true;
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected parameter");
+ return NULL;
+ }
+ if (parser->tok != ')') {
+ parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
+ goto on_error;
+ }
+ }
+ else
+ {
+ /* for anything else just parse a typename */
+ param = parse_typename(parser, NULL);
+ if (!param)
+ goto on_error;
+ if (!paramlist_t_p_add(¶ms, param))
+ goto on_error;
+ }
+ }
+
+ /* sanity check */
+ if (params.p_count > 8)
+ parseerror(parser, "more than 8 parameters are currently not supported");
+
+ /* parse-out */
+ if (!parser_next(parser)) {
+ parseerror(parser, "parse error after typename");
+ goto on_error;
+ }
+
+ /* now turn 'var' into a function type */
+ fval = ast_value_new(ctx, "<type()>", TYPE_FUNCTION);
+ fval->expression.next = (ast_expression*)var;
+ fval->expression.variadic = variadic;
+ var = fval;
+
+ MEM_VECTOR_MOVE(¶ms, p, &var->expression, params);
+
+ return var;
+
+on_error:
+ ast_delete(var);
+ for (i = 0; i < params.p_count; ++i)
+ ast_delete(params.p[i]);
+ MEM_VECTOR_CLEAR(¶ms, p);
+ return NULL;
+}
+
+/* Parse a complete typename.
+ * for single-variables (ie. function parameters or typedefs) storebase should be NULL
+ * but when parsing variables separated by comma
+ * 'storebase' should point to where the base-type should be kept.
+ * The base type makes up every bit of type information which comes *before* the
+ * variable name.
+ *
+ * The following will be parsed in its entirety:
+ * void() foo()
+ * The 'basetype' in this case is 'void()'
+ * and if there's a comma after it, say:
+ * void() foo(), bar
+ * then the type-information 'void()' can be stored in 'storebase'
+ */
+static ast_value *parse_typename(parser_t *parser, ast_value **storebase)
+{
+ ast_value *var, *tmp;
+ lex_ctx ctx;
+
+ const char *name = NULL;
+ bool isfield = false;
+
+ ctx = parser_ctx(parser);
+
+ /* types may start with a dot */
+ if (parser->tok == '.') {
+ isfield = true;
+ /* if we parsed a dot we need a typename now */
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected typename for field definition");
+ return NULL;
+ }
+ if (parser->tok != TOKEN_TYPENAME) {
+ parseerror(parser, "expected typename");
+ return NULL;
+ }
+ }
+
+ /* generate the basic type value */
+ var = ast_value_new(ctx, "<type>", parser_token(parser)->constval.t);
+ /* do not yet turn into a field - remember:
+ * .void() foo; is a field too
+ * .void()() foo; is a function
+ */
+
+ /* parse on */
+ if (!parser_next(parser)) {
+ ast_delete(var);
+ parseerror(parser, "parse error after typename");
+ return NULL;
+ }
+
+ /* an opening paren now starts the parameter-list of a function */
+ if (parser->tok == '(') {
+ var = parse_parameter_list(parser, var);
+ if (!var)
+ return NULL;
+ }
+ /* This is the point where we can turn it into a field */
+ if (isfield) {
+ /* turn it into a field if desired */
+ tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
+ tmp->expression.next = (ast_expression*)var;
+ var = tmp;
+ }
+
+ while (parser->tok == '(') {
+ var = parse_parameter_list(parser, var);
+ if (!var)
+ return NULL;
+ }
+
+ /* store the base if requested */
+ if (storebase) {
+ *storebase = ast_value_copy(var);
+ }
+
+ /* there may be a name now */
+ if (parser->tok == TOKEN_IDENT) {
+ name = util_strdup(parser_tokval(parser));
+ /* parse on */
+ if (!parser_next(parser)) {
+ parseerror(parser, "error after variable or field declaration");
+ return NULL;
+ }
+ }
+
+ /* now there may be function parens again */
+ while (parser->tok == '(') {
+ var = parse_parameter_list(parser, var);
+ if (!var) {
+ if (name)
+ mem_d((void*)name);
+ return NULL;
+ }
+ }
+
+ /* finally name it */
+ if (name) {
+ if (!ast_value_set_name(var, name)) {
+ ast_delete(var);
+ parseerror(parser, "internal error: failed to set name");
+ return NULL;
+ }
+ /* free the name, ast_value_set_name duplicates */
+ mem_d((void*)name);
+ }
+
+ return var;
+}
+
static bool parse_variable(parser_t *parser, ast_block *localblock)
{
+ ast_value *var;
+ ast_value *proto;
+ ast_expression *old;
+ bool was_end;
+ size_t i;
+
+ ast_value *basetype = NULL;
+ bool retval = true;
+ bool isparam = false;
+ bool isvector = false;
+ bool cleanvar = true;
+
+ varentry_t varent, ve[3];
+
+ /* get the first complete variable */
+ var = parse_typename(parser, &basetype);
+ if (!var) {
+ if (basetype)
+ ast_delete(basetype);
+ return false;
+ }
+
+ memset(&varent, 0, sizeof(varent));
+ memset(&ve, 0, sizeof(ve));
+
+ while (true) {
+ proto = NULL;
+
+ /* Part 0: finish the type */
+ while (parser->tok == '(') {
+ var = parse_parameter_list(parser, var);
+ if (!var) {
+ retval = false;
+ goto cleanup;
+ }
+ }
+
+ /* Part 1:
+ * check for validity: (end_sys_..., multiple-definitions, prototypes, ...)
+ * Also: if there was a prototype, `var` will be deleted and set to `proto` which
+ * is then filled with the previous definition and the parameter-names replaced.
+ */
+ if (!localblock) {
+ /* Deal with end_sys_ vars */
+ was_end = false;
+ if (!strcmp(var->name, "end_sys_globals")) {
+ parser->crc_globals = parser->globals_count;
+ was_end = true;
+ }
+ else if (!strcmp(var->name, "end_sys_fields")) {
+ parser->crc_fields = parser->fields_count;
+ was_end = true;
+ }
+ if (was_end && var->expression.vtype == TYPE_FIELD) {
+ if (parsewarning(parser, WARN_END_SYS_FIELDS,
+ "global '%s' hint should not be a field",
+ parser_tokval(parser)))
+ {
+ retval = false;
+ goto cleanup;
+ }
+ }
+
+ if (var->expression.vtype == TYPE_FIELD)
+ {
+ /* deal with field declarations */
+ old = parser_find_field(parser, var->name);
+ if (old) {
+ if (parsewarning(parser, WARN_FIELD_REDECLARED, "field `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, (int)ast_ctx(old).line))
+ {
+ retval = false;
+ goto cleanup;
+ }
+ ast_delete(var);
+ var = NULL;
+ goto skipvar;
+ /*
+ parseerror(parser, "field `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, ast_ctx(old).line);
+ retval = false;
+ goto cleanup;
+ */
+ }
+ if (opts_standard == COMPILER_QCC &&
+ (old = parser_find_global(parser, var->name)))
+ {
+ parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
+ parseerror(parser, "field `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, ast_ctx(old).line);
+ retval = false;
+ goto cleanup;
+ }
+ }
+ else
+ {
+ /* deal with other globals */
+ old = parser_find_global(parser, var->name);
+ if (old && var->expression.vtype == TYPE_FUNCTION && old->expression.vtype == TYPE_FUNCTION)
+ {
+ /* This is a function which had a prototype */
+ if (!ast_istype(old, ast_value)) {
+ parseerror(parser, "internal error: prototype is not an ast_value");
+ retval = false;
+ goto cleanup;
+ }
+ proto = (ast_value*)old;
+ if (!ast_compare_type((ast_expression*)proto, (ast_expression*)var)) {
+ parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
+ proto->name,
+ ast_ctx(proto).file, ast_ctx(proto).line);
+ retval = false;
+ goto cleanup;
+ }
+ /* we need the new parameter-names */
+ for (i = 0; i < proto->expression.params_count; ++i)
+ ast_value_set_name(proto->expression.params[i], var->expression.params[i]->name);
+ ast_delete(var);
+ var = proto;
+ }
+ else
+ {
+ /* other globals */
+ if (old) {
+ parseerror(parser, "global `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, ast_ctx(old).line);
+ retval = false;
+ goto cleanup;
+ }
+ if (opts_standard == COMPILER_QCC &&
+ (old = parser_find_field(parser, var->name)))
+ {
+ parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
+ parseerror(parser, "global `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, ast_ctx(old).line);
+ retval = false;
+ goto cleanup;
+ }
+ }
+ }
+ }
+ else /* it's not a global */
+ {
+ old = parser_find_local(parser, var->name, parser->blocklocal, &isparam);
+ if (old && !isparam) {
+ parseerror(parser, "local `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
+ retval = false;
+ goto cleanup;
+ }
+ old = parser_find_local(parser, var->name, 0, &isparam);
+ if (old && isparam) {
+ if (parsewarning(parser, WARN_LOCAL_SHADOWS,
+ "local `%s` is shadowing a parameter", var->name))
+ {
+ parseerror(parser, "local `%s` already declared here: %s:%i",
+ var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
+ retval = false;
+ goto cleanup;
+ }
+ if (opts_standard != COMPILER_GMQCC) {
+ ast_delete(var);
+ var = NULL;
+ goto skipvar;
+ }
+ }
+ }
+
+ /* Part 2:
+ * Create the global/local, and deal with vector types.
+ */
+ if (!proto) {
+ if (var->expression.vtype == TYPE_VECTOR)
+ isvector = true;
+ else if (var->expression.vtype == TYPE_FIELD &&
+ var->expression.next->expression.vtype == TYPE_VECTOR)
+ isvector = true;
+
+ if (isvector) {
+ if (!create_vector_members(parser, var, ve)) {
+ retval = false;
+ goto cleanup;
+ }
+ }
+
+ varent.name = util_strdup(var->name);
+ varent.var = (ast_expression*)var;
+
+ if (!localblock) {
+ /* deal with global variables, fields, functions */
+ if (var->expression.vtype == TYPE_FIELD) {
+ if (!(retval = parser_t_fields_add(parser, varent)))
+ goto cleanup;
+ if (isvector) {
+ for (i = 0; i < 3; ++i) {
+ if (!(retval = parser_t_fields_add(parser, ve[i])))
+ break;
+ }
+ if (!retval) {
+ parser->fields_count -= i+1;
+ goto cleanup;
+ }
+ }
+ }
+ else {
+ if (!(retval = parser_t_globals_add(parser, varent)))
+ goto cleanup;
+ if (isvector) {
+ for (i = 0; i < 3; ++i) {
+ if (!(retval = parser_t_globals_add(parser, ve[i])))
+ break;
+ }
+ if (!retval) {
+ parser->globals_count -= i+1;
+ goto cleanup;
+ }
+ }
+ }
+ } else {
+ if (!(retval = parser_t_locals_add(parser, varent)))
+ goto cleanup;
+ if (!(retval = ast_block_locals_add(localblock, var))) {
+ parser->locals_count--;
+ goto cleanup;
+ }
+ if (isvector) {
+ for (i = 0; i < 3; ++i) {
+ if (!(retval = parser_t_locals_add(parser, ve[i])))
+ break;
+ if (!(retval = ast_block_collect(localblock, ve[i].var)))
+ break;
+ ve[i].var = NULL; /* from here it's being collected in the block */
+ }
+ if (!retval) {
+ parser->locals_count -= i+1;
+ localblock->locals_count--;
+ goto cleanup;
+ }
+ }
+ }
+
+ varent.name = NULL;
+ ve[0].name = ve[1].name = ve[2].name = NULL;
+ ve[0].var = ve[1].var = ve[2].var = NULL;
+ cleanvar = false;
+ }
+
+skipvar:
+ if (parser->tok == ';') {
+ ast_delete(basetype);
+ if (!parser_next(parser)) {
+ parseerror(parser, "error after variable declaration");
+ return false;
+ }
+ return true;
+ }
+
+ if (parser->tok == ',')
+ goto another;
+
+ if (!var || (!localblock && basetype->expression.vtype == TYPE_FIELD)) {
+ parseerror(parser, "missing comma or semicolon while parsing variables");
+ break;
+ }
+
+ if (localblock && opts_standard == COMPILER_QCC) {
+ if (parsewarning(parser, WARN_LOCAL_CONSTANTS,
+ "initializing expression turns variable `%s` into a constant in this standard",
+ var->name) )
+ {
+ break;
+ }
+ }
+
+ if (parser->tok != '=') {
+ parseerror(parser, "missing semicolon or initializer");
+ break;
+ }
+
+ if (!parser_next(parser)) {
+ parseerror(parser, "error parsing initializer");
+ break;
+ }
+
+ if (parser->tok == '#') {
+ ast_function *func;
+
+ if (localblock) {
+ parseerror(parser, "cannot declare builtins within functions");
+ break;
+ }
+ if (var->expression.vtype != TYPE_FUNCTION) {
+ parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
+ break;
+ }
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected builtin number");
+ break;
+ }
+ if (parser->tok != TOKEN_INTCONST) {
+ parseerror(parser, "builtin number must be an integer constant");
+ break;
+ }
+ if (parser_token(parser)->constval.i <= 0) {
+ parseerror(parser, "builtin number must be an integer greater than zero");
+ break;
+ }
+
+ func = ast_function_new(ast_ctx(var), var->name, var);
+ if (!func) {
+ parseerror(parser, "failed to allocate function for `%s`", var->name);
+ break;
+ }
+ if (!parser_t_functions_add(parser, func)) {
+ parseerror(parser, "failed to allocate slot for function `%s`", var->name);
+ ast_function_delete(func);
+ var->constval.vfunc = NULL;
+ break;
+ }
+
+ func->builtin = -parser_token(parser)->constval.i;
+
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected comma or semicolon");
+ ast_function_delete(func);
+ var->constval.vfunc = NULL;
+ break;
+ }
+ }
+ else if (parser->tok == '{' || parser->tok == '[')
+ {
+ if (localblock) {
+ parseerror(parser, "cannot declare functions within functions");
+ break;
+ }
+
+ if (!parse_function_body(parser, var))
+ break;
+ ast_delete(basetype);
+ return true;
+ } else {
+ ast_expression *cexp;
+ ast_value *cval;
+
+ cexp = parse_expression_leave(parser, true);
+ if (!cexp)
+ break;
+
+ cval = (ast_value*)cexp;
+ if (!ast_istype(cval, ast_value) || !cval->isconst)
+ parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
+ else
+ {
+ var->isconst = true;
+ if (cval->expression.vtype == TYPE_STRING)
+ var->constval.vstring = parser_strdup(cval->constval.vstring);
+ else
+ memcpy(&var->constval, &cval->constval, sizeof(var->constval));
+ ast_unref(cval);
+ }
+ }
+
+another:
+ if (parser->tok == ',') {
+ if (!parser_next(parser)) {
+ parseerror(parser, "expected another variable");
+ break;
+ }
+
+ if (parser->tok != TOKEN_IDENT) {
+ parseerror(parser, "expected another variable");
+ break;
+ }
+ var = ast_value_copy(basetype);
+ cleanvar = true;
+ ast_value_set_name(var, parser_tokval(parser));
+ if (!parser_next(parser)) {
+ parseerror(parser, "error parsing variable declaration");
+ break;
+ }
+ continue;
+ }
+
+ if (parser->tok != ';') {
+ parseerror(parser, "missing semicolon after variables");
+ break;
+ }
+
+ if (!parser_next(parser)) {
+ parseerror(parser, "parse error after variable declaration");
+ break;
+ }
+
+ ast_delete(basetype);
+ return true;
+ }
+
+ if (cleanvar && var)
+ ast_delete(var);
+ ast_delete(basetype);
+ return false;
+
+cleanup:
+ ast_delete(basetype);
+ if (cleanvar && var)
+ ast_delete(var);
+ if (varent.name) mem_d(varent.name);
+ if (ve[0].name) mem_d(ve[0].name);
+ if (ve[1].name) mem_d(ve[1].name);
+ if (ve[2].name) mem_d(ve[2].name);
+ if (ve[0].var) mem_d(ve[0].var);
+ if (ve[1].var) mem_d(ve[1].var);
+ if (ve[2].var) mem_d(ve[2].var);
+ return retval;
+
+#if 0
bool isfunc = false;
lex_ctx ctx;
if (ve[2].var) mem_d(ve[2].var);
return retval;
+#endif
}
static bool parser_global_statement(parser_t *parser)
projects / xonotic / gmqcc.git / commitdiff