Update doc/specification.tex

[xonotic/gmqcc.git] / parser.c

diff --git a/parser.c b/parser.c
index ac6428a4c268ee21fd79eefce4463e1e8d02bb48..aa536c50ac8161f4cba91617781cfb2603c4aa7e 100644 (file)
--- a/parser.c
+++ b/parser.c
@@ -51,7 +51,10 @@ typedef struct {
 
     ast_value *imm_float_zero;
     ast_value *imm_float_one;
+    ast_value *imm_float_neg_one;
+
     ast_value *imm_vector_zero;
+
     ast_value *nil;
     ast_value *reserved_version;
 
@@ -135,16 +138,6 @@ static bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *
     return r;
 }
 
-static bool GMQCC_WARN genwarning(lex_ctx ctx, int warntype, const char *fmt, ...)
-{
-    bool    r;
-    va_list ap;
-    va_start(ap, fmt);
-    r = vcompile_warning(ctx, warntype, fmt, ap);
-    va_end(ap);
-    return r;
-}
-
 /**********************************************************************
  * some maths used for constant folding
  */
@@ -232,6 +225,12 @@ static ast_value* parser_const_float_0(parser_t *parser)
     return parser->imm_float_zero;
 }
 
+static ast_value* parser_const_float_neg1(parser_t *parser) {
+    if (!parser->imm_float_neg_one)
+        parser->imm_float_neg_one = parser_const_float(parser, -1);
+    return parser->imm_float_neg_one;
+}
+
 static ast_value* parser_const_float_1(parser_t *parser)
 {
     if (!parser->imm_float_one)
@@ -450,7 +449,7 @@ static sy_elem syparen(lex_ctx ctx, size_t off) {
  */
 static bool rotate_entfield_array_index_nodes(ast_expression **out)
 {
-    ast_array_index *index;
+    ast_array_index *index, *oldindex;
     ast_entfield    *entfield;
 
     ast_value       *field;
@@ -474,12 +473,16 @@ static bool rotate_entfield_array_index_nodes(ast_expression **out)
     sub    = index->index;
     entity = entfield->entity;
 
-    ast_delete(index);
+    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;
 }
 
@@ -640,7 +643,7 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
             {
 #if 0
                 /* This is not broken in fteqcc anymore */
-                if (opts.standard != COMPILER_GMQCC) {
+                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"
@@ -1111,7 +1114,7 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
                 }
                 else
                     assignop = type_storep_instr[exprs[0]->expression.vtype];
-                if (assignop == AINSTR_END || !ast_compare_type(field->expression.next, exprs[1]))
+                if (assignop == VINSTR_END || !ast_compare_type(field->expression.next, exprs[1]))
                 {
                     ast_type_to_string(field->expression.next, ty1, sizeof(ty1));
                     ast_type_to_string(exprs[1], ty2, sizeof(ty2));
@@ -1138,7 +1141,7 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
                     assignop = type_store_instr[exprs[0]->expression.vtype];
                 }
 
-                if (assignop == AINSTR_END) {
+                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);
@@ -1356,6 +1359,20 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
             asbinstore->keep_dest = true;
             out = (ast_expression*)asbinstore;
             break;
+
+        case opid2('~', 'P'):
+            if (exprs[0]->expression.vtype != TYPE_FLOAT) {
+                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
+                compile_error(ast_ctx(exprs[0]), "invalid type for bit not: %s", ty1);
+                return false;
+            }
+
+            if(CanConstFold1(exprs[0]))
+                out = (ast_expression*)parser_const_float(parser, ~(qcint)ConstF(0));
+            else
+                out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, (ast_expression*)parser_const_float_neg1(parser), exprs[0]);
+            break;
+            
     }
 #undef NotSameType
 
@@ -1794,7 +1811,7 @@ static bool parse_sya_operand(parser_t *parser, shunt *sy, bool with_labels)
                  * We should also consider adding correction tables for
                  * other things as well.
                  */
-                if (opts.correction) {
+                if (OPTS_OPTION_BOOL(OPTION_CORRECTION)) {
                     correction_t corr;
                     correct_init(&corr);
 
@@ -2645,7 +2662,7 @@ static bool parse_for_go(parser_t *parser, ast_block *block, ast_expression **ou
 
     if (typevar || parser->tok == TOKEN_TYPENAME) {
 #if 0
-        if (opts.standard != COMPILER_GMQCC) {
+        if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
             if (parsewarning(parser, WARN_EXTENSIONS,
                              "current standard does not allow variable declarations in for-loop initializers"))
                 goto onerr;
@@ -2690,11 +2707,12 @@ static bool parse_for_go(parser_t *parser, ast_block *block, ast_expression **ou
 
     /* parse the incrementor */
     if (parser->tok != ')') {
+        lex_ctx condctx = parser_ctx(parser);
         increment = parse_expression_leave(parser, false, false, false);
         if (!increment)
             goto onerr;
         if (!ast_side_effects(increment)) {
-            if (genwarning(ast_ctx(increment), WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
+            if (compile_warning(condctx, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
                 goto onerr;
         }
     }
@@ -3374,7 +3392,7 @@ static bool parse_statement(parser_t *parser, ast_block *block, ast_expression *
             parseerror(parser, "cannot declare a variable from here");
             return false;
         }
-        if (opts.standard == COMPILER_QCC) {
+        if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
             if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
                 return false;
         }
@@ -3441,7 +3459,7 @@ static bool parse_statement(parser_t *parser, ast_block *block, ast_expression *
         }
         else if (!strcmp(parser_tokval(parser), "for"))
         {
-            if (opts.standard == COMPILER_QCC) {
+            if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
                 if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
                     return false;
             }
@@ -3540,12 +3558,13 @@ static bool parse_statement(parser_t *parser, ast_block *block, ast_expression *
     }
     else
     {
+        lex_ctx ctx = parser_ctx(parser);
         ast_expression *exp = parse_expression(parser, false, false);
         if (!exp)
             return false;
         *out = exp;
         if (!ast_side_effects(exp)) {
-            if (genwarning(ast_ctx(exp), WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
+            if (compile_warning(ctx, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
                 return false;
         }
         return true;
@@ -4042,7 +4061,7 @@ static bool parse_function_body(parser_t *parser, ast_value *var)
 
     if (parser->tok == ';')
         return parser_next(parser);
-    else if (opts.standard == COMPILER_QCC)
+    else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
         parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
     return retval;
 
@@ -4558,7 +4577,7 @@ static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
         vec_free(params);
 
     /* sanity check */
-    if (vec_size(params) > 8 && opts.standard == COMPILER_QCC)
+    if (vec_size(params) > 8 && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
         (void)!parsewarning(parser, WARN_EXTENSIONS, "more than 8 parameters are not supported by this standard");
 
     /* parse-out */
@@ -4772,7 +4791,7 @@ static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_va
     }
 
     /* now there may be function parens again */
-    if (parser->tok == '(' && opts.standard == COMPILER_QCC)
+    if (parser->tok == '(' && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
         parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
     if (parser->tok == '(' && wasarray)
         parseerror(parser, "arrays as part of a return type is not supported");
@@ -4911,7 +4930,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
 
         /* Part 0: finish the type */
         if (parser->tok == '(') {
-            if (opts.standard == COMPILER_QCC)
+            if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
                 parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
             var = parse_parameter_list(parser, var);
             if (!var) {
@@ -4934,7 +4953,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
         }
         /* for functions returning functions */
         while (parser->tok == '(') {
-            if (opts.standard == COMPILER_QCC)
+            if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
                 parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
             var = parse_parameter_list(parser, var);
             if (!var) {
@@ -5004,7 +5023,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
                     goto cleanup;
                     */
                 }
-                if ((opts.standard == COMPILER_QCC || opts.standard == COMPILER_FTEQCC) &&
+                if ((OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC || OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_FTEQCC) &&
                     (old = parser_find_global(parser, var->name)))
                 {
                     parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
@@ -5076,7 +5095,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
                         ast_delete(var);
                         var = proto;
                     }
-                    if (opts.standard == COMPILER_QCC &&
+                    if (OPTS_OPTION_U32(OPTION_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");
@@ -5107,7 +5126,7 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
                     retval = false;
                     goto cleanup;
                 }
-                if (opts.standard != COMPILER_GMQCC) {
+                if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
                     ast_delete(var);
                     var = NULL;
                     goto skipvar;
@@ -5287,7 +5306,7 @@ skipvar:
             break;
         }
 
-        if (localblock && opts.standard == COMPILER_QCC) {
+        if (localblock && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
             if (parsewarning(parser, WARN_LOCAL_CONSTANTS,
                              "initializing expression turns variable `%s` into a constant in this standard",
                              var->name) )
@@ -5307,7 +5326,7 @@ skipvar:
                 break;
             }
         }
-        else if (opts.standard == COMPILER_QCC) {
+        else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
             parseerror(parser, "expected '=' before function body in this standard");
         }
 
@@ -5539,7 +5558,7 @@ static bool parser_global_statement(parser_t *parser)
     }
     else
     {
-        parseerror(parser, "unexpected token: %s", parser->lex->tok.value);
+        parseerror(parser, "unexpected token: `%s`", parser->lex->tok.value);
         return false;
     }
     return true;
@@ -5668,7 +5687,7 @@ bool parser_init()
     parser->const_vec[1] = ast_value_new(empty_ctx, "<vector.y>", TYPE_NOEXPR);
     parser->const_vec[2] = ast_value_new(empty_ctx, "<vector.z>", TYPE_NOEXPR);
 
-    if (opts.add_info) {
+    if (OPTS_OPTION_BOOL(OPTION_ADD_INFO)) {
         parser->reserved_version = ast_value_new(empty_ctx, "reserved:version", TYPE_STRING);
         parser->reserved_version->cvq = CV_CONST;
         parser->reserved_version->hasvalue = true;
@@ -5853,8 +5872,8 @@ bool parser_finish(const char *output)
             continue;
         asvalue = (ast_value*)(parser->globals[i]);
         if (!asvalue->uses && !asvalue->hasvalue && asvalue->expression.vtype != TYPE_FUNCTION) {
-            retval = retval && !genwarning(ast_ctx(asvalue), WARN_UNUSED_VARIABLE,
-                                           "unused global: `%s`", asvalue->name);
+            retval = retval && !compile_warning(ast_ctx(asvalue), WARN_UNUSED_VARIABLE,
+                                                "unused global: `%s`", asvalue->name);
         }
         if (!ast_global_codegen(asvalue, ir, false)) {
             con_out("failed to generate global %s\n", asvalue->name);
@@ -5957,7 +5976,7 @@ bool parser_finish(const char *output)
             return false;
         }
     }
-    if (opts.dump)
+    if (OPTS_OPTION_BOOL(OPTION_DUMP))
         ir_builder_dump(ir, con_out);
     for (i = 0; i < vec_size(parser->functions); ++i) {
         if (!ir_function_finalize(parser->functions[i]->ir_func)) {
@@ -5974,7 +5993,7 @@ bool parser_finish(const char *output)
     }
 
     if (retval) {
-        if (opts.dumpfin)
+        if (OPTS_OPTION_BOOL(OPTION_DUMPFIN))
             ir_builder_dump(ir, con_out);
 
         generate_checksum(parser);