]> git.xonotic.org Git - xonotic/gmqcc.git/blobdiff - parser.c
for compile-time constants << and >> are now available
[xonotic/gmqcc.git] / parser.c
index 229d2ec0da2c6495cad77c3b4d4f3eb1fb67db85..b15280b8d993ee9f33441463a700762f1ed460fb 100644 (file)
--- a/parser.c
+++ b/parser.c
@@ -74,6 +74,10 @@ typedef struct {
     ht htglobals;
     ht *typedefs;
 
+    /* same as above but for the spelling corrector */
+    correct_trie_t  **correct_variables;
+    size_t         ***correct_variables_score;  /* vector of vector of size_t* */
+
     /* not to be used directly, we use the hash table */
     ast_expression **_locals;
     size_t          *_blocklocals;
@@ -105,6 +109,7 @@ static const ast_expression *intrinsic_debug_typestring = (ast_expression*)0x10;
 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);
@@ -924,14 +929,21 @@ static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
                     exprs[0], exprs[1]);
             break;
         case opid1('^'):
-            parseerror(parser, "TODO: bitxor");
+            compile_error(ast_ctx(exprs[0]), "Not Yet Implemented: bit-xor via ^");
             return false;
 
         case opid2('<','<'):
         case opid2('>','>'):
+            if (CanConstFold(exprs[0], exprs[1]) && ! NotSameType(TYPE_FLOAT)) {
+                if (op->id == opid2('<','<'))
+                    out = (ast_expression*)parser_const_float(parser, (double)((int)(ConstF(0)) << (int)(ConstF(1))));
+                else
+                    out = (ast_expression*)parser_const_float(parser, (double)((int)(ConstF(0)) >> (int)(ConstF(1))));
+                break;
+            }
         case opid3('<','<','='):
         case opid3('>','>','='):
-            parseerror(parser, "TODO: shifts");
+            compile_error(ast_ctx(exprs[0]), "Not Yet Implemented: bit-shifts");
             return false;
 
         case opid2('|','|'):
@@ -1614,13 +1626,15 @@ static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma
                 }
                 else
                 {
+                    size_t i;
+                    char  *correct = NULL;
+
                     /*
                      * sometimes people use preprocessing predefs without enabling them
                      * i've done this thousands of times already myself.  Lets check for
                      * it in the predef table.  And diagnose it better :)
                      */
                     if (!OPTS_FLAG(FTEPP_PREDEFS)) {
-                        size_t i;
                         for (i = 0; i < sizeof(ftepp_predefs)/sizeof(*ftepp_predefs); i++) {
                             if (!strcmp(ftepp_predefs[i].name, parser_tokval(parser))) {
                                 parseerror(parser, "unexpected ident: %s (use -fftepp-predef to enable pre-defined macros)", parser_tokval(parser));
@@ -1629,6 +1643,34 @@ static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma
                         }
                     }
 
+                    /*
+                     * TODO: determine the best score for the identifier: be it
+                     * a variable, a field.
+                     *
+                     * We should also consider adding correction tables for
+                     * other things as well.
+                     */
+                    if (OPTS_FLAG(ENHANCED_DIAGNOSTICS)) {
+                        correction_t corr;
+                        correct_init(&corr);
+
+                        for (i = 0; i < vec_size(parser->correct_variables); i++) {
+                            correct = correct_str(&corr, parser->correct_variables[i], parser_tokval(parser));
+                            if (strcmp(correct, parser_tokval(parser))) {
+                                break;
+                            } else if (correct) {
+                                mem_d(correct);
+                                correct = NULL;
+                            }
+                        }
+                        correct_free(&corr);
+
+                        if (correct) {
+                            parseerror(parser, "unexpected ident: %s (did you mean %s?)", parser_tokval(parser), correct);
+                            mem_d(correct);
+                            goto onerr;
+                        }
+                    }
                     parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
                     goto onerr;
                 }
@@ -1968,6 +2010,10 @@ static void parser_enterblock(parser_t *parser)
     vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
     vec_push(parser->_blocktypedefs, vec_size(parser->_typedefs));
     vec_push(parser->_block_ctx, parser_ctx(parser));
+
+    /* corrector */
+    vec_push(parser->correct_variables, correct_trie_new());
+    vec_push(parser->correct_variables_score, NULL);
 }
 
 static bool parser_leaveblock(parser_t *parser)
@@ -1981,7 +2027,11 @@ static bool parser_leaveblock(parser_t *parser)
     }
 
     util_htdel(vec_last(parser->variables));
+    correct_del(vec_last(parser->correct_variables), vec_last(parser->correct_variables_score));
+
     vec_pop(parser->variables);
+    vec_pop(parser->correct_variables);
+    vec_pop(parser->correct_variables_score);
     if (!vec_size(parser->_blocklocals)) {
         parseerror(parser, "internal error: parser_leaveblock with no block (2)");
         return false;
@@ -2008,6 +2058,7 @@ static bool parser_leaveblock(parser_t *parser)
     vec_pop(parser->typedefs);
 
     vec_pop(parser->_block_ctx);
+
     return rv;
 }
 
@@ -2015,6 +2066,26 @@ static void parser_addlocal(parser_t *parser, const char *name, ast_expression *
 {
     vec_push(parser->_locals, e);
     util_htset(vec_last(parser->variables), name, (void*)e);
+
+    /* corrector */
+    correct_add (
+         vec_last(parser->correct_variables),
+        &vec_last(parser->correct_variables_score),
+        name
+    );
+}
+
+static void parser_addglobal(parser_t *parser, const char *name, ast_expression *e)
+{
+    vec_push(parser->globals, e);
+    util_htset(parser->htglobals, name, e);
+
+    /* corrector */
+    correct_add (
+         parser->correct_variables[0],
+        &parser->correct_variables_score[0],
+        name
+    );
 }
 
 static ast_expression* process_condition(parser_t *parser, ast_expression *cond, bool *_ifnot)
@@ -2120,6 +2191,8 @@ static bool parse_if(parser_t *parser, ast_block *block, ast_expression **out)
         ast_delete(cond);
         return false;
     }
+    if (!ontrue)
+        ontrue = (ast_expression*)ast_block_new(parser_ctx(parser));
     /* check for an else */
     if (!strcmp(parser_tokval(parser), "else")) {
         /* parse into the 'else' branch */
@@ -2597,6 +2670,13 @@ static bool parse_break_continue(parser_t *parser, ast_block *block, ast_express
         return false;
     }
 
+    if (!vec_size(loops)) {
+        if (is_continue)
+            parseerror(parser, "`continue` can only be used inside loops");
+        else
+            parseerror(parser, "`break` can only be used inside loops or switches");
+    }
+
     if (parser->tok == TOKEN_IDENT) {
         if (!OPTS_FLAG(LOOP_LABELS))
             parseerror(parser, "labeled loops not activated, try using -floop-labels");
@@ -3547,8 +3627,8 @@ static bool parse_function_body(parser_t *parser, ast_value *var)
                 return false;
             }
 
-            vec_push(parser->globals, (ast_expression*)thinkfunc);
-            util_htset(parser->htglobals, thinkfunc->name, thinkfunc);
+            parser_addglobal(parser, thinkfunc->name, (ast_expression*)thinkfunc);
+
             nextthink = (ast_expression*)thinkfunc;
 
         } else {
@@ -4764,12 +4844,10 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
                     }
                 }
                 else {
-                    vec_push(parser->globals, (ast_expression*)var);
-                    util_htset(parser->htglobals, var->name, var);
+                    parser_addglobal(parser, var->name, (ast_expression*)var);
                     if (isvector) {
                         for (i = 0; i < 3; ++i) {
-                            vec_push(parser->globals, (ast_expression*)me[i]);
-                            util_htset(parser->htglobals, me[i]->name, me[i]);
+                            parser_addglobal(parser, me[i]->name, (ast_expression*)me[i]);
                         }
                     }
                 }
@@ -4790,6 +4868,14 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
 
                     /* Add it to the local scope */
                     util_htset(vec_last(parser->variables), var->name, (void*)var);
+
+                    /* corrector */
+                    correct_add (
+                         vec_last(parser->correct_variables),
+                        &vec_last(parser->correct_variables_score),
+                        var->name
+                    );
+
                     /* now rename the global */
                     ln = strlen(var->name);
                     vec_append(defname, ln, var->name);
@@ -4803,6 +4889,13 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
                         for (i = 0; i < 3; ++i) {
                             util_htset(vec_last(parser->variables), me[i]->name, (void*)(me[i]));
 
+                            /* corrector */
+                            correct_add(
+                                 vec_last(parser->correct_variables),
+                                &vec_last(parser->correct_variables_score),
+                                me[i]->name
+                            );
+
                             vec_shrinkto(defname, prefix_len);
                             ln = strlen(me[i]->name);
                             vec_append(defname, ln, me[i]->name);
@@ -5248,6 +5341,10 @@ bool parser_init()
     vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
     vec_push(parser->_blocktypedefs, 0);
 
+    /* corrector */
+    vec_push(parser->correct_variables, correct_trie_new());
+    vec_push(parser->correct_variables_score, NULL);
+
     empty_ctx.file = "<internal>";
     empty_ctx.line = 0;
     parser->nil = ast_value_new(empty_ctx, "nil", TYPE_NIL);
@@ -5349,6 +5446,14 @@ void parser_cleanup()
     vec_free(parser->_blocklocals);
     vec_free(parser->_locals);
 
+    /* corrector */
+    for (i = 0; i < vec_size(parser->correct_variables); ++i) {
+        correct_del(parser->correct_variables[i], parser->correct_variables_score[i]);
+    }
+    vec_free(parser->correct_variables);
+    vec_free(parser->correct_variables_score);
+
+
     for (i = 0; i < vec_size(parser->_typedefs); ++i)
         ast_delete(parser->_typedefs[i]);
     vec_free(parser->_typedefs);