%{ /* * Copyright 2012 Hans Leidekker for CodeWeavers * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include <stdarg.h> #include "windef.h" #include "winbase.h" #include "wbemcli.h" #include "wbemprox_private.h" #include "wine/list.h" #include "wine/debug.h" #include "wine/unicode.h" WINE_DEFAULT_DEBUG_CHANNEL(wbemprox); struct parser { const WCHAR *cmd; UINT idx; UINT len; HRESULT error; struct view **view; struct list *mem; }; struct string { const WCHAR *data; int len; }; static void *alloc_mem( struct parser *parser, UINT size ) { struct list *mem = heap_alloc( sizeof(struct list) + size ); list_add_tail( parser->mem, mem ); return &mem[1]; } static struct property *alloc_property( struct parser *parser, const WCHAR *class, const WCHAR *name ) { struct property *prop = alloc_mem( parser, sizeof(*prop) ); if (prop) { prop->name = name; prop->class = class; prop->next = NULL; } return prop; } static WCHAR *get_string( struct parser *parser, const struct string *str ) { const WCHAR *p = str->data; int len = str->len; WCHAR *ret; if ((p[0] == '\"' && p[len - 1] != '\"') || (p[0] == '\'' && p[len - 1] != '\'')) return NULL; if ((p[0] == '\"' && p[len - 1] == '\"') || (p[0] == '\'' && p[len - 1] == '\'')) { p++; len -= 2; } if (!(ret = alloc_mem( parser, (len + 1) * sizeof(WCHAR) ))) return NULL; memcpy( ret, p, len * sizeof(WCHAR) ); ret[len] = 0; return ret; } static int get_int( struct parser *parser ) { const WCHAR *p = &parser->cmd[parser->idx]; int i, ret = 0; for (i = 0; i < parser->len; i++) { if (p[i] < '0' || p[i] > '9') { ERR("should only be numbers here!\n"); break; } ret = (p[i] - '0') + ret * 10; } return ret; } static struct expr *expr_complex( struct parser *parser, struct expr *l, UINT op, struct expr *r ) { struct expr *e = alloc_mem( parser, sizeof(*e) ); if (e) { e->type = EXPR_COMPLEX; e->u.expr.left = l; e->u.expr.op = op; e->u.expr.right = r; } return e; } static struct expr *expr_unary( struct parser *parser, struct expr *l, UINT op ) { struct expr *e = alloc_mem( parser, sizeof(*e) ); if (e) { e->type = EXPR_UNARY; e->u.expr.left = l; e->u.expr.op = op; e->u.expr.right = NULL; } return e; } static struct expr *expr_ival( struct parser *parser, int val ) { struct expr *e = alloc_mem( parser, sizeof *e ); if (e) { e->type = EXPR_IVAL; e->u.ival = val; } return e; } static struct expr *expr_sval( struct parser *parser, const struct string *str ) { struct expr *e = alloc_mem( parser, sizeof *e ); if (e) { e->type = EXPR_SVAL; e->u.sval = get_string( parser, str ); if (!e->u.sval) return NULL; /* e will be freed by query destructor */ } return e; } static struct expr *expr_bval( struct parser *parser, int val ) { struct expr *e = alloc_mem( parser, sizeof *e ); if (e) { e->type = EXPR_BVAL; e->u.ival = val; } return e; } static struct expr *expr_propval( struct parser *parser, const struct property *prop ) { struct expr *e = alloc_mem( parser, sizeof *e ); if (e) { e->type = EXPR_PROPVAL; e->u.propval = prop; } return e; } static int wql_error( struct parser *parser, const char *str ); static int wql_lex( void *val, struct parser *parser ); #define PARSER_BUBBLE_UP_VIEW( parser, result, current_view ) \ *parser->view = current_view; \ result = current_view %} %lex-param { struct parser *ctx } %parse-param { struct parser *ctx } %error-verbose %pure-parser %union { struct string str; WCHAR *string; struct property *proplist; struct view *view; struct expr *expr; int integer; } %token TK_SELECT TK_FROM TK_STAR TK_COMMA TK_DOT TK_IS TK_LP TK_RP TK_NULL TK_FALSE TK_TRUE %token TK_INTEGER TK_WHERE TK_SPACE TK_MINUS TK_ILLEGAL TK_BY %token <str> TK_STRING TK_ID %type <string> id %type <proplist> prop proplist %type <view> select %type <expr> expr prop_val const_val string_val %type <integer> number %left TK_OR %left TK_AND %left TK_NOT %left TK_EQ TK_NE TK_LT TK_GT TK_LE TK_GE TK_LIKE %% select: TK_SELECT TK_FROM id { HRESULT hr; struct parser *parser = ctx; struct view *view; hr = create_view( NULL, $3, NULL, &view ); if (hr != S_OK) YYABORT; PARSER_BUBBLE_UP_VIEW( parser, $$, view ); } | TK_SELECT proplist TK_FROM id { HRESULT hr; struct parser *parser = ctx; struct view *view; hr = create_view( $2, $4, NULL, &view ); if (hr != S_OK) YYABORT; PARSER_BUBBLE_UP_VIEW( parser, $$, view ); } | TK_SELECT proplist TK_FROM id TK_WHERE expr { HRESULT hr; struct parser *parser = ctx; struct view *view; hr = create_view( $2, $4, $6, &view ); if (hr != S_OK) YYABORT; PARSER_BUBBLE_UP_VIEW( parser, $$, view ); } ; proplist: prop | prop TK_COMMA proplist { $1->next = $3; } | TK_STAR { $$ = NULL; } ; prop: id TK_DOT id { $$ = alloc_property( ctx, $1, $3 ); if (!$$) YYABORT; } | id { $$ = alloc_property( ctx, NULL, $1 ); if (!$$) YYABORT; } ; id: TK_ID { $$ = get_string( ctx, &$1 ); if (!$$) YYABORT; } ; number: TK_INTEGER { $$ = get_int( ctx ); } ; expr: TK_LP expr TK_RP { $$ = $2; if (!$$) YYABORT; } | expr TK_AND expr { $$ = expr_complex( ctx, $1, OP_AND, $3 ); if (!$$) YYABORT; } | expr TK_OR expr { $$ = expr_complex( ctx, $1, OP_OR, $3 ); if (!$$) YYABORT; } | TK_NOT expr { $$ = expr_unary( ctx, $2, OP_NOT ); if (!$$) YYABORT; } | prop_val TK_EQ const_val { $$ = expr_complex( ctx, $1, OP_EQ, $3 ); if (!$$) YYABORT; } | prop_val TK_GT const_val { $$ = expr_complex( ctx, $1, OP_GT, $3 ); if (!$$) YYABORT; } | prop_val TK_LT const_val { $$ = expr_complex( ctx, $1, OP_LT, $3 ); if (!$$) YYABORT; } | prop_val TK_LE const_val { $$ = expr_complex( ctx, $1, OP_LE, $3 ); if (!$$) YYABORT; } | prop_val TK_GE const_val { $$ = expr_complex( ctx, $1, OP_GE, $3 ); if (!$$) YYABORT; } | prop_val TK_NE const_val { $$ = expr_complex( ctx, $1, OP_NE, $3 ); if (!$$) YYABORT; } | const_val TK_EQ prop_val { $$ = expr_complex( ctx, $1, OP_EQ, $3 ); if (!$$) YYABORT; } | const_val TK_GT prop_val { $$ = expr_complex( ctx, $1, OP_GT, $3 ); if (!$$) YYABORT; } | const_val TK_LT prop_val { $$ = expr_complex( ctx, $1, OP_LT, $3 ); if (!$$) YYABORT; } | const_val TK_LE prop_val { $$ = expr_complex( ctx, $1, OP_LE, $3 ); if (!$$) YYABORT; } | const_val TK_GE prop_val { $$ = expr_complex( ctx, $1, OP_GE, $3 ); if (!$$) YYABORT; } | const_val TK_NE prop_val { $$ = expr_complex( ctx, $1, OP_NE, $3 ); if (!$$) YYABORT; } | prop_val TK_LIKE string_val { $$ = expr_complex( ctx, $1, OP_LIKE, $3 ); if (!$$) YYABORT; } | prop_val TK_IS TK_NULL { $$ = expr_unary( ctx, $1, OP_ISNULL ); if (!$$) YYABORT; } | prop_val TK_IS TK_NOT TK_NULL { $$ = expr_unary( ctx, $1, OP_NOTNULL ); if (!$$) YYABORT; } | prop_val TK_EQ TK_NULL { $$ = expr_unary( ctx, $1, OP_ISNULL ); if (!$$) YYABORT; } | TK_NULL TK_EQ prop_val { $$ = expr_unary( ctx, $3, OP_ISNULL ); if (!$$) YYABORT; } | prop_val TK_NE TK_NULL { $$ = expr_unary( ctx, $1, OP_NOTNULL ); if (!$$) YYABORT; } | TK_NULL TK_NE prop_val { $$ = expr_unary( ctx, $3, OP_NOTNULL ); if (!$$) YYABORT; } ; string_val: TK_STRING { $$ = expr_sval( ctx, &$1 ); if (!$$) YYABORT; } ; prop_val: prop { $$ = expr_propval( ctx, $1 ); if (!$$) YYABORT; } ; const_val: number { $$ = expr_ival( ctx, $1 ); if (!$$) YYABORT; } | TK_STRING { $$ = expr_sval( ctx, &$1 ); if (!$$) YYABORT; } | TK_TRUE { $$ = expr_bval( ctx, -1 ); if (!$$) YYABORT; } | TK_FALSE { $$ = expr_bval( ctx, 0 ); if (!$$) YYABORT; } ; %% HRESULT parse_query( const WCHAR *str, struct view **view, struct list *mem ) { struct parser parser; int ret; *view = NULL; parser.cmd = str; parser.idx = 0; parser.len = 0; parser.error = WBEM_E_INVALID_QUERY; parser.view = view; parser.mem = mem; ret = wql_parse( &parser ); TRACE("wql_parse returned %d\n", ret); if (ret) { if (*parser.view) { destroy_view( *parser.view ); *parser.view = NULL; } return parser.error; } return S_OK; } static const char id_char[] = { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, }; struct keyword { const WCHAR *name; unsigned int len; int type; }; #define MAX_TOKEN_LEN 6 static const WCHAR andW[] = {'A','N','D'}; static const WCHAR byW[] = {'B','Y'}; static const WCHAR falseW[] = {'F','A','L','S','E'}; static const WCHAR fromW[] = {'F','R','O','M'}; static const WCHAR isW[] = {'I','S'}; static const WCHAR likeW[] = {'L','I','K','E'}; static const WCHAR notW[] = {'N','O','T'}; static const WCHAR nullW[] = {'N','U','L','L'}; static const WCHAR orW[] = {'O','R'}; static const WCHAR selectW[] = {'S','E','L','E','C','T'}; static const WCHAR trueW[] = {'T','R','U','E'}; static const WCHAR whereW[] = {'W','H','E','R','E'}; static const struct keyword keyword_table[] = { { andW, SIZEOF(andW), TK_AND }, { byW, SIZEOF(byW), TK_BY }, { falseW, SIZEOF(falseW), TK_FALSE }, { fromW, SIZEOF(fromW), TK_FROM }, { isW, SIZEOF(isW), TK_IS }, { likeW, SIZEOF(likeW), TK_LIKE }, { notW, SIZEOF(notW), TK_NOT }, { nullW, SIZEOF(nullW), TK_NULL }, { orW, SIZEOF(orW), TK_OR }, { selectW, SIZEOF(selectW), TK_SELECT }, { trueW, SIZEOF(trueW), TK_TRUE }, { whereW, SIZEOF(whereW), TK_WHERE } }; static int cmp_keyword( const void *arg1, const void *arg2 ) { const struct keyword *key1 = arg1, *key2 = arg2; int len = min( key1->len, key2->len ); int ret; if ((ret = memicmpW( key1->name, key2->name, len ))) return ret; if (key1->len < key2->len) return -1; else if (key1->len > key2->len) return 1; return 0; } static int keyword_type( const WCHAR *str, unsigned int len ) { struct keyword key, *ret; if (len > MAX_TOKEN_LEN) return TK_ID; key.name = str; key.len = len; key.type = 0; ret = bsearch( &key, keyword_table, SIZEOF(keyword_table), sizeof(struct keyword), cmp_keyword ); if (ret) return ret->type; return TK_ID; } static int get_token( const WCHAR *s, int *token ) { int i; switch (*s) { case ' ': case '\t': case '\r': case '\n': for (i = 1; isspaceW( s[i] ); i++) {} *token = TK_SPACE; return i; case '-': if (!s[1]) return -1; *token = TK_MINUS; return 1; case '(': *token = TK_LP; return 1; case ')': *token = TK_RP; return 1; case '*': *token = TK_STAR; return 1; case '=': *token = TK_EQ; return 1; case '<': if (s[1] == '=' ) { *token = TK_LE; return 2; } else if (s[1] == '>') { *token = TK_NE; return 2; } else { *token = TK_LT; return 1; } case '>': if (s[1] == '=') { *token = TK_GE; return 2; } else { *token = TK_GT; return 1; } case '!': if (s[1] != '=') { *token = TK_ILLEGAL; return 2; } else { *token = TK_NE; return 2; } case ',': *token = TK_COMMA; return 1; case '\"': case '\'': for (i = 1; s[i]; i++) { if (s[i] == s[0]) break; } if (s[i]) i++; *token = TK_STRING; return i; case '.': if (!isdigitW( s[1] )) { *token = TK_DOT; return 1; } /* fall through */ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': *token = TK_INTEGER; for (i = 1; isdigitW( s[i] ); i++) {} return i; default: if (!id_char[*s]) break; for (i = 1; id_char[s[i]]; i++) {} *token = keyword_type( s, i ); return i; } *token = TK_ILLEGAL; return 1; } static int wql_lex( void *p, struct parser *parser ) { struct string *str = p; int token = -1; do { parser->idx += parser->len; if (!parser->cmd[parser->idx]) return 0; parser->len = get_token( &parser->cmd[parser->idx], &token ); if (!parser->len) break; str->data = &parser->cmd[parser->idx]; str->len = parser->len; } while (token == TK_SPACE); return token; } static int wql_error( struct parser *parser, const char *str ) { ERR("%s\n", str); return 0; }