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%{
/* -*- Mode: C -*- */
/* ====================================================================== */
/* FILE: icalssyacc.y */
/* CREATOR: eric 08 Aug 2000 */
/* */
/* DESCRIPTION: */
/* */
/* $Id: icalssyacc.y,v 1.10 2008-01-14 00:35:26 dothebart Exp $ */
/* $Locker: $ */
/* */
/* (C) COPYRIGHT 2000, Eric Busboom, http://www.softwarestudio.org */
/* */
/* This program is free software; you can redistribute it and/or modify */
/* it under the terms of either: */
/* */
/* The LGPL as published by the Free Software Foundation, version */
/* 2.1, available at: http://www.fsf.org/copyleft/lesser.html */
/* */
/* Or: */
/* */
/* The Mozilla Public License Version 1.0. You may obtain a copy of */
/* the License at http://www.mozilla.org/MPL/ */
/* */
/* The Original Code is eric. The Initial Developer of the Original */
/* Code is Eric Busboom */
/* */
/* ====================================================================== */
/*#define YYDEBUG 1*/
#include <stdlib.h>
#include <string.h> /* for strdup() */
#include <limits.h> /* for SHRT_MAX*/
#include <libical/ical.h>
#include "icalgauge.h"
#include "icalgaugeimpl.h"
extern struct icalgauge_impl *icalss_yy_gauge;
#define YYPARSE_PARAM yy_globals
#define YYLEX_PARAM yy_globals
#define YY_EXTRA_TYPE icalgauge_impl*
void sserror(char *s);
static void ssyacc_add_where(struct icalgauge_impl* impl, char* prop,
icalgaugecompare compare , char* value);
static void ssyacc_add_select(struct icalgauge_impl* impl, char* str1);
static void ssyacc_add_from(struct icalgauge_impl* impl, char* str1);
static void set_logic(struct icalgauge_impl* impl,icalgaugelogic l);
/* Don't know why I need this.... */
/* older flex version (such as included in OpenBSD) takes a different calling syntax */
#ifdef YYPARSE_PARAM
int sslex(void *YYPARSE_PARAM);
#else
int sslex(void);
#endif
%}
%union {
char* v_string;
}
%token <v_string> STRING
%token SELECT FROM WHERE COMMA QUOTE EQUALS NOTEQUALS LESS GREATER LESSEQUALS
%token GREATEREQUALS AND OR EOL END IS NOT SQLNULL
%%
query_min: SELECT select_list FROM from_list WHERE where_list
| SELECT select_list FROM from_list
| error {
yyclearin;
YYABORT;
}
;
select_list:
STRING {ssyacc_add_select(icalss_yy_gauge,$1);}
| select_list COMMA STRING {ssyacc_add_select(icalss_yy_gauge,$3);}
;
from_list:
STRING {ssyacc_add_from(icalss_yy_gauge,$1);}
| from_list COMMA STRING {ssyacc_add_from(icalss_yy_gauge,$3);}
;
where_clause:
/* Empty */
| STRING EQUALS STRING {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_EQUAL,$3); }
| STRING IS SQLNULL {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_ISNULL,""); }
| STRING IS NOT SQLNULL {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_ISNOTNULL,""); }
| STRING NOTEQUALS STRING {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_NOTEQUAL,$3); }
| STRING LESS STRING {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_LESS,$3); }
| STRING GREATER STRING {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_GREATER,$3); }
| STRING LESSEQUALS STRING {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_LESSEQUAL,$3); }
| STRING GREATEREQUALS STRING {ssyacc_add_where(icalss_yy_gauge,$1,ICALGAUGECOMPARE_GREATEREQUAL,$3); }
;
where_list:
where_clause {set_logic(icalss_yy_gauge,ICALGAUGELOGIC_NONE);}
| where_list AND where_clause {set_logic(icalss_yy_gauge,ICALGAUGELOGIC_AND);}
| where_list OR where_clause {set_logic(icalss_yy_gauge,ICALGAUGELOGIC_OR);}
;
%%
static void ssyacc_add_where(struct icalgauge_impl* impl, char* str1,
icalgaugecompare compare , char* value_str)
{
struct icalgauge_where *where;
char *compstr, *propstr, *c, *s,*l;
if ( (where = malloc(sizeof(struct icalgauge_where))) ==0){
icalerror_set_errno(ICAL_NEWFAILED_ERROR);
return;
}
memset(where,0,sizeof(struct icalgauge_where));
where->logic = ICALGAUGELOGIC_NONE;
where->compare = ICALGAUGECOMPARE_NONE;
where->comp = ICAL_NO_COMPONENT;
where->prop = ICAL_NO_PROPERTY;
/* remove enclosing quotes */
s = value_str;
if(*s == '\''){
s++;
}
l = s+strlen(s)-1;
if(*l == '\''){
*l=0;
}
where->value = strdup(s);
/* Is there a period in str1 ? If so, the string specified both a */
/* component and a property */
if( (c = strrchr(str1,'.')) != 0){
compstr = str1;
propstr = c+1;
*c = '\0';
} else {
compstr = 0;
propstr = str1;
}
/* Handle the case where a component was specified */
if(compstr != 0){
where->comp = icalenum_string_to_component_kind(compstr);
} else {
where->comp = ICAL_NO_COMPONENT;
}
where->prop = icalenum_string_to_property_kind(propstr);
where->compare = compare;
if(where->value == 0){
icalerror_set_errno(ICAL_NEWFAILED_ERROR);
free(where->value);
return;
}
pvl_push(impl->where,where);
}
static void set_logic(struct icalgauge_impl* impl,icalgaugelogic l)
{
pvl_elem e = pvl_tail(impl->where);
struct icalgauge_where *where = pvl_data(e);
where->logic = l;
}
static void ssyacc_add_select(struct icalgauge_impl* impl, char* str1)
{
char *c, *compstr, *propstr;
struct icalgauge_where *where;
/* Uses only the prop and comp fields of the where structure */
if ( (where = malloc(sizeof(struct icalgauge_where))) ==0){
icalerror_set_errno(ICAL_NEWFAILED_ERROR);
return;
}
memset(where,0,sizeof(struct icalgauge_where));
where->logic = ICALGAUGELOGIC_NONE;
where->compare = ICALGAUGECOMPARE_NONE;
where->comp = ICAL_NO_COMPONENT;
where->prop = ICAL_NO_PROPERTY;
/* Is there a period in str1 ? If so, the string specified both a */
/* component and a property */
if( (c = strrchr(str1,'.')) != 0){
compstr = str1;
propstr = c+1;
*c = '\0';
} else {
compstr = 0;
propstr = str1;
}
/* Handle the case where a component was specified */
if(compstr != 0){
where->comp = icalenum_string_to_component_kind(compstr);
} else {
where->comp = ICAL_NO_COMPONENT;
}
/* If the property was '*', then accept all properties */
if(strcmp("*",propstr) == 0) {
where->prop = ICAL_ANY_PROPERTY;
} else {
where->prop = icalenum_string_to_property_kind(propstr);
}
if(where->prop == ICAL_NO_PROPERTY){
free(where);
icalerror_set_errno(ICAL_BADARG_ERROR);
return;
}
pvl_push(impl->select,where);
}
static void ssyacc_add_from(struct icalgauge_impl* impl, char* str1)
{
icalcomponent_kind ckind;
ckind = icalenum_string_to_component_kind(str1);
if(ckind == ICAL_NO_COMPONENT){
assert(0);
}
pvl_push(impl->from,(void*)ckind);
}
void sserror(char *s){
fprintf(stderr,"Parse error \'%s\'\n", s);
icalerror_set_errno(ICAL_MALFORMEDDATA_ERROR);
}
|
