[evolution-data-server] Fix e_book_backend_summary_is_summary_query()

[Milan Crha <mcrha src gnome org>]

commit bd74caa5b154d86803c3f39db5265de97e554ea6
Author: Milan Crha <mcrha redhat com>
Date:   Fri Jun 21 10:43:37 2013 +0200

    Fix e_book_backend_summary_is_summary_query()
    
    It didn't check on correct summary fields being used, but on a result
    of the expression, which is not correct when there comes a 'not' in it.
    This broke "Unmatched" filter in evolution's Contacts view, which is
    testing nonexistence of a CATEGORIES attribute in a vCard.

 addressbook/libedata-book/e-book-backend-summary.c |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)
---
diff --git a/addressbook/libedata-book/e-book-backend-summary.c 
b/addressbook/libedata-book/e-book-backend-summary.c
index f2e6e4b..ce9dec1 100644
--- a/addressbook/libedata-book/e-book-backend-summary.c
+++ b/addressbook/libedata-book/e-book-backend-summary.c
@@ -900,6 +900,7 @@ func_check (struct _ESExp *f,
 {
        ESExpResult *r;
        gint truth = FALSE;
+       gboolean *pretval = data;
 
        if (argc == 2
            && argv[0]->type == ESEXP_RES_STRING
@@ -917,6 +918,9 @@ func_check (struct _ESExp *f,
        r = e_sexp_result_new (f, ESEXP_RES_BOOL);
        r->value.boolean = truth;
 
+       if (pretval)
+               *pretval = (*pretval) && truth;
+
        return r;
 }
 
@@ -931,7 +935,8 @@ static const struct {
        { "is", func_check, 0 },
        { "beginswith", func_check, 0 },
        { "endswith", func_check, 0 },
-       { "exists", func_check, 0 }
+       { "exists", func_check, 0 },
+       { "exists_vcard", func_check, 0 }
 };
 
 /**
@@ -950,7 +955,7 @@ e_book_backend_summary_is_summary_query (EBookBackendSummary *summary,
 {
        ESExp *sexp;
        ESExpResult *r;
-       gboolean retval;
+       gboolean retval = TRUE;
        gint i;
        gint esexp_error;
 
@@ -961,11 +966,11 @@ e_book_backend_summary_is_summary_query (EBookBackendSummary *summary,
        for (i = 0; i < G_N_ELEMENTS (check_symbols); i++) {
                if (check_symbols[i].type == 1) {
                        e_sexp_add_ifunction (sexp, 0, check_symbols[i].name,
-                                            (ESExpIFunc *) check_symbols[i].func, summary);
+                                            (ESExpIFunc *) check_symbols[i].func, &retval);
                } else {
                        e_sexp_add_function (
                                sexp, 0, check_symbols[i].name,
-                               check_symbols[i].func, summary);
+                               check_symbols[i].func, &retval);
                }
        }
 
@@ -973,12 +978,13 @@ e_book_backend_summary_is_summary_query (EBookBackendSummary *summary,
        esexp_error = e_sexp_parse (sexp);
 
        if (esexp_error == -1) {
+               e_sexp_unref (sexp);
                return FALSE;
        }
 
        r = e_sexp_eval (sexp);
 
-       retval = (r && r->type == ESEXP_RES_BOOL && r->value.boolean);
+       retval = retval && (r && r->type == ESEXP_RES_BOOL && r->value.boolean);
 
        e_sexp_result_free (sexp, r);