A mk_cmds clone that creates SL structures.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@4400 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/sl/parse.y

@@ -0,0 +1,191 @@
+%{
+/*
+ * Copyright (c) 1998 Kungliga Tekniska H<>gskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. All advertising materials mentioning features or use of this software 
+ *    must display the following acknowledgement: 
+ *      This product includes software developed by Kungliga Tekniska 
+ *      H<>gskolan and its contributors. 
+ *
+ * 4. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#include "make_cmds.h"
+RCSID("$Id$");
+
+void yyerror (char *s);
+long name2number(const char *str);
+
+struct string_list* append_string(struct string_list*, char*);
+void free_string_list(struct string_list *list);
+unsigned string_to_flag(const char *);
+%}
+
+%union {
+  char *string;
+  unsigned number;
+  struct string_list *list;
+}
+
+%token TABLE REQUEST UNKNOWN UNIMPLEMENTED END
+%token <string> STRING
+%type <number> flag flags
+%type <list> aliases
+
+%%
+
+file		: /* */ 
+		| statements
+		;
+
+statements	: statement
+		| statements statement
+		;
+
+statement	: TABLE STRING ';'
+		{
+		    table_name = $2;
+		}
+		| REQUEST STRING ',' STRING ',' aliases ',' '(' flags ')' ';'
+		{
+		    add_command($2, $4, $6, $9);
+		}
+		| REQUEST STRING ',' STRING ',' aliases ';'
+		{
+		    add_command($2, $4, $6, 0);
+		}
+		| UNIMPLEMENTED STRING ',' STRING ',' aliases ';'
+		{
+		    free($2);
+		    free($4);
+		    free_string_list($6);
+		}
+		| UNKNOWN aliases ';'
+		{
+		    free_string_list($2);
+		}
+		| END ';'
+		{
+		    return;
+		}
+		;
+
+aliases		: STRING
+		{
+		    $$ = append_string(NULL, $1);
+		}
+		| aliases ',' STRING
+		{
+		    $$ = append_string($1, $3);
+		}
+		;
+
+flags		: flag
+		{
+		    $$ = $1;
+		}
+		| flags ',' flag
+		{
+		    $$ = $1 | $3;
+		}
+		;
+flag		: STRING
+		{
+		    $$ = string_to_flag($1);
+		    free($1);
+		}
+		;
+
+
+
+%%
+
+long
+name2number(const char *str)
+{
+    const char *p;
+    long base = 0;
+    const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	"abcdefghijklmnopqrstuvwxyz0123456789_";
+    if(strlen(str) > 4) {
+	yyerror("table name too long");
+	return 0;
+    }
+    for(p = str; *p; p++){
+	char *q = strchr(x, *p);
+	if(q == NULL) {
+	    yyerror("invalid character in table name");
+	    return 0;
+	}
+	base = (base << 6) + (q - x) + 1;
+    }
+    base <<= 8;
+    if(base > 0x7fffffff)
+	base = -(0xffffffff - base + 1);
+    return base;
+}
+
+void
+yyerror (char *s)
+{
+    error_message ("%s\n", s);
+}
+
+struct string_list*
+append_string(struct string_list *list, char *str)
+{
+    struct string_list *sl = malloc(sizeof(*sl));
+    sl->string = str;
+    sl->next = NULL;
+    if(list) {
+	*list->tail = sl;
+	list->tail = &sl->next;
+	return list;
+    }
+    sl->tail = &sl->next;
+    return sl;
+}
+
+void
+free_string_list(struct string_list *list)
+{
+    while(list) {
+	struct string_list *sl = list->next;
+	free(list->string);
+	free(list);
+	list = sl;
+    }
+}
+
+unsigned
+string_to_flag(const char *string)
+{
+    return 0;
+}