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parse.y
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parse.y
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%{
/*
* Copyright (c) 2000 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: parse.y,v 1.2 2000/11/09 21:58:00 steve Exp $"
#endif
# include <stdio.h>
# include <malloc.h>
# include "globals.h"
void yyerror(const char*);
enum drive_code_t {
CODE_S,
CODE_t,
};
struct drive_cond {
struct drive_cond*next;
enum drive_code_t code;
char* text;
};
static struct drive_cond *cur_cond = 0;
static void add_cond(enum drive_code_t code, char*text)
{
struct drive_cond*tmp;
tmp = calloc(1, sizeof(struct drive_cond));
tmp->code = code;
tmp->text = text;
tmp->next = cur_cond;
cur_cond = tmp;
}
struct drive_pattern {
struct drive_pattern*next;
char*name;
char*text;
struct drive_cond*cond;
};
static struct drive_pattern *patterns = 0;
static struct drive_pattern *plast = 0;
static void add_pattern(char*name, char*text)
{
struct drive_pattern*tmp;
tmp = calloc(1, sizeof(struct drive_pattern));
tmp->name = name;
tmp->text = text;
tmp->cond = cur_cond;
tmp->next = 0;
if (plast) {
plast->next = tmp;
plast = tmp;
} else {
patterns = tmp;
plast = tmp;
}
}
const char*lookup_pattern(const char*key)
{
struct drive_pattern*cur;
struct drive_cond*cc;
for (cur = patterns ; cur ; cur = cur->next) {
if (strcmp(key, cur->name) != 0)
continue;
for (cc = cur->cond ; cc ; cc = cc->next) {
switch (cc->code) {
case CODE_S:
if (synth_flag)
continue;
break;
case CODE_t:
if (strcmp(targ, cc->text) == 0)
continue;
break;
}
break;
}
if (cc) continue;
return cur->text;
}
return 0;
}
%}
%union {
char*text;
};
%token <text> PATTERN_NAME PATTERN_TEXT
%token <text> CT_t
%token CT_S
%%
start: section_list
section_list
: section
| section_list section
;
section : '[' ctoken_list ']' pattern_list { cur_cond = 0; } ;
ctoken_list
: ctoken
| ctoken_list ctoken
;
ctoken : CT_S { add_cond(CODE_S, 0); }
| CT_t { add_cond(CODE_t, $1); }
;
pattern_list
: pattern
| pattern_list pattern
;
pattern : PATTERN_NAME PATTERN_TEXT
{ add_pattern($1, $2); }
;
%%
void yyerror(const char*msg)
{
fprintf(stderr, "%s\n", msg);
}