parse.y revision 127807 
1%{
2/*
3 * Copyright (c) 1998 - 2000 Kungliga Tekniska H�gskolan
4 * (Royal Institute of Technology, Stockholm, Sweden).
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * 3. Neither the name of the Institute nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34/* $FreeBSD: head/contrib/com_err/parse.y 127807 2004-04-03 21:17:01Z nectar $ */
35
36#include "compile_et.h"
37#include "lex.h"
38#if 0
39RCSID("$Id: parse.y,v 1.11 2000/06/22 00:42:52 assar Exp $");
40#endif
41
42void yyerror (char *s);
43static long name2number(const char *str);
44
45extern char *yytext;
46
47/* This is for bison */
48
49#if !defined(alloca) && !defined(HAVE_ALLOCA)
50#define alloca(x) malloc(x)
51#endif
52
53%}
54
55%union {
56  char *string;
57  int number;
58}
59
60%token ET INDEX PREFIX EC ID END
61%token <string> STRING
62%token <number> NUMBER
63
64%%
65
66file		: /* */
67		| header statements
68		;
69
70header		: id et
71		| et
72		;
73
74id		: ID STRING
75		{
76		    id_str = $2;
77		}
78		;
79
80et		: ET STRING
81		{
82		    base = name2number($2);
83		    strncpy(name, $2, sizeof(name));
84		    name[sizeof(name) - 1] = '\0';
85		    free($2);
86		}
87		| ET STRING STRING
88		{
89		    base = name2number($2);
90		    strncpy(name, $3, sizeof(name));
91		    name[sizeof(name) - 1] = '\0';
92		    free($2);
93		    free($3);
94		}
95		;
96
97statements	: statement
98		| statements statement
99		;
100
101statement	: INDEX NUMBER
102		{
103			number = $2;
104		}
105		| PREFIX STRING
106		{
107		    prefix = realloc(prefix, strlen($2) + 2);
108		    strcpy(prefix, $2);
109		    strcat(prefix, "_");
110		    free($2);
111		}
112		| PREFIX
113		{
114		    prefix = realloc(prefix, 1);
115		    *prefix = '\0';
116		}
117		| EC STRING ',' STRING
118		{
119		    struct error_code *ec = malloc(sizeof(*ec));
120
121		    ec->next = NULL;
122		    ec->number = number;
123		    if(prefix && *prefix != '\0') {
124			asprintf (&ec->name, "%s%s", prefix, $2);
125			free($2);
126		    } else
127			ec->name = $2;
128		    ec->string = $4;
129		    APPEND(codes, ec);
130		    number++;
131		}
132		| END
133		{
134			YYACCEPT;
135		}
136		;
137
138%%
139
140static long
141name2number(const char *str)
142{
143    const char *p;
144    long base = 0;
145    const char *x = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
146	"abcdefghijklmnopqrstuvwxyz0123456789_";
147    if(strlen(str) > 4) {
148	yyerror("table name too long");
149	return 0;
150    }
151    for(p = str; *p; p++){
152	char *q = strchr(x, *p);
153	if(q == NULL) {
154	    yyerror("invalid character in table name");
155	    return 0;
156	}
157	base = (base << 6) + (q - x) + 1;
158    }
159    base <<= 8;
160    if(base > 0x7fffffff)
161	base = -(0xffffffff - base + 1);
162    return base;
163}
164
165void
166yyerror (char *s)
167{
168     error_message ("%s\n", s);
169}
170