Diffstat (limited to 'libical/src/libicalss/icalssyacc.y') (more/less context) (show whitespace changes)
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diff --git a/libical/src/libicalss/icalssyacc.y b/libical/src/libicalss/icalssyacc.y new file mode 100644 index 0000000..6482b58 --- a/dev/null +++ b/libical/src/libicalss/icalssyacc.y @@ -0,0 +1,245 @@ +%{ +/* -*- Mode: C -*- + ====================================================================== + FILE: icalssyacc.y + CREATOR: eric 08 Aug 2000 + + DESCRIPTION: + + $Id$ + $Locker$ + +(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 + + ======================================================================*/ + +#include <stdlib.h> +#include <string.h> /* for strdup() */ +#include <limits.h> /* for SHRT_MAX*/ +#include "ical.h" +#include "pvl.h" +#include "icalgauge.h" +#include "icalgaugeimpl.h" + + +extern struct icalgauge_impl *icalss_yy_gauge; + +void ssyacc_add_where(struct icalgauge_impl* impl, char* prop, + icalgaugecompare compare , char* value); +void ssyacc_add_select(struct icalgauge_impl* impl, char* str1); +void ssyacc_add_from(struct icalgauge_impl* impl, char* str1); +void set_logic(struct icalgauge_impl* impl,icalgaugelogic l); +void sserror(char *s); /* Don't know why I need this.... */ + + + +%} + +%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 + +%% + +query_min: SELECT select_list FROM from_list WHERE where_list + | error { + icalparser_clear_flex_input(); + yyclearin; + } + ; + +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 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);} + ; + + +%% + +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); +} + +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; + +} + + + +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){ + icalgauge_free(where); + icalerror_set_errno(ICAL_BADARG_ERROR); + return; + } + + pvl_push(impl->select,where); +} + +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); +} |