lib: merge internal prefix tables

Replace multiple tables with some flags in a single table. This makes
the code in notmuch_database_open_verbose a bit shorter, and it should
also make it easier to add other options to fields, e.g. regexp
searching.

diff --git a/lib/database-private.h b/lib/database-private.h
index ccc1e9a17fbddde4839fc754a7f781d799146469..67d985700934e216a964450c1ba017995ce8b4f0 100644 (file)
--- a/lib/database-private.h
+++ b/lib/database-private.h
@@ -148,6 +148,30 @@ operator&=(_notmuch_features &a, _notmuch_features b)
     return a;
 }
 
+/*
+ * Configuration options for xapian database fields */
+typedef enum notmuch_field_flags {
+    NOTMUCH_FIELD_NO_FLAGS = 0,
+    NOTMUCH_FIELD_EXTERNAL = 1 << 0,
+    NOTMUCH_FIELD_PROBABILISTIC = 1 << 1
+} notmuch_field_flag_t;
+
+/*
+ * define bitwise operators to hide casts */
+inline notmuch_field_flag_t
+operator|(notmuch_field_flag_t a, notmuch_field_flag_t b)
+{
+    return static_cast<notmuch_field_flag_t>(
+       static_cast<unsigned>(a) | static_cast<unsigned>(b));
+}
+
+inline notmuch_field_flag_t
+operator&(notmuch_field_flag_t a, notmuch_field_flag_t b)
+{
+    return static_cast<notmuch_field_flag_t>(
+       static_cast<unsigned>(a) & static_cast<unsigned>(b));
+}
+
 #define NOTMUCH_QUERY_PARSER_FLAGS (Xapian::QueryParser::FLAG_BOOLEAN | \
                                    Xapian::QueryParser::FLAG_PHRASE | \
                                    Xapian::QueryParser::FLAG_LOVEHATE | \

diff --git a/lib/database.cc b/lib/database.cc
index 2d19f20c4b5e5d6c75518942917d4550a4891dcb..b954b34cc3be57fd76fe182753f10849685e6371 100644 (file)
--- a/lib/database.cc
+++ b/lib/database.cc
@@ -42,6 +42,7 @@ using namespace std;
 typedef struct {
     const char *name;
     const char *prefix;
+    notmuch_field_flag_t flags;
 } prefix_t;
 
 #define NOTMUCH_DATABASE_VERSION 3
@@ -247,37 +248,38 @@ typedef struct {
  * nearly universal to all mail messages).
  */
 
-static prefix_t BOOLEAN_PREFIX_INTERNAL[] = {
-    { "type",                  "T" },
-    { "reference",             "XREFERENCE" },
-    { "replyto",               "XREPLYTO" },
-    { "directory",             "XDIRECTORY" },
-    { "file-direntry",         "XFDIRENTRY" },
-    { "directory-direntry",    "XDDIRENTRY" },
-};
-
-static prefix_t BOOLEAN_PREFIX_EXTERNAL[] = {
-    { "thread",                        "G" },
-    { "tag",                   "K" },
-    { "is",                    "K" },
-    { "id",                    "Q" },
-    { "path",                  "P" },
-    { "property",              "XPROPERTY" },
+static const
+prefix_t prefix_table[] = {
+    /* name                    term prefix     flags */
+    { "type",                  "T",            NOTMUCH_FIELD_NO_FLAGS },
+    { "reference",             "XREFERENCE",   NOTMUCH_FIELD_NO_FLAGS },
+    { "replyto",               "XREPLYTO",     NOTMUCH_FIELD_NO_FLAGS },
+    { "directory",             "XDIRECTORY",   NOTMUCH_FIELD_NO_FLAGS },
+    { "file-direntry",         "XFDIRENTRY",   NOTMUCH_FIELD_NO_FLAGS },
+    { "directory-direntry",    "XDDIRENTRY",   NOTMUCH_FIELD_NO_FLAGS },
+    { "thread",                        "G",            NOTMUCH_FIELD_EXTERNAL },
+    { "tag",                   "K",            NOTMUCH_FIELD_EXTERNAL },
+    { "is",                    "K",            NOTMUCH_FIELD_EXTERNAL },
+    { "id",                    "Q",            NOTMUCH_FIELD_EXTERNAL },
+    { "path",                  "P",            NOTMUCH_FIELD_EXTERNAL },
+    { "property",              "XPROPERTY",    NOTMUCH_FIELD_EXTERNAL },
     /*
      * Unconditionally add ':' to reduce potential ambiguity with
      * overlapping prefixes and/or terms that start with capital
      * letters. See Xapian document termprefixes.html for related
      * discussion.
      */
-    { "folder",                        "XFOLDER:" },
-};
-
-static prefix_t PROBABILISTIC_PREFIX[]= {
-    { "from",                  "XFROM" },
-    { "to",                    "XTO" },
-    { "attachment",            "XATTACHMENT" },
-    { "mimetype",              "XMIMETYPE"},
-    { "subject",               "XSUBJECT"},
+    { "folder",                        "XFOLDER:",     NOTMUCH_FIELD_EXTERNAL },
+    { "from",                  "XFROM",        NOTMUCH_FIELD_EXTERNAL |
+                                               NOTMUCH_FIELD_PROBABILISTIC },
+    { "to",                    "XTO",          NOTMUCH_FIELD_EXTERNAL |
+                                               NOTMUCH_FIELD_PROBABILISTIC },
+    { "attachment",            "XATTACHMENT",  NOTMUCH_FIELD_EXTERNAL |
+                                               NOTMUCH_FIELD_PROBABILISTIC },
+    { "mimetype",              "XMIMETYPE",    NOTMUCH_FIELD_EXTERNAL |
+                                               NOTMUCH_FIELD_PROBABILISTIC },
+    { "subject",               "XSUBJECT",     NOTMUCH_FIELD_EXTERNAL |
+                                               NOTMUCH_FIELD_PROBABILISTIC },
 };
 
 const char *
@@ -285,19 +287,9 @@ _find_prefix (const char *name)
 {
     unsigned int i;
 
-    for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_INTERNAL); i++) {
-       if (strcmp (name, BOOLEAN_PREFIX_INTERNAL[i].name) == 0)
-           return BOOLEAN_PREFIX_INTERNAL[i].prefix;
-    }
-
-    for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_EXTERNAL); i++) {
-       if (strcmp (name, BOOLEAN_PREFIX_EXTERNAL[i].name) == 0)
-           return BOOLEAN_PREFIX_EXTERNAL[i].prefix;
-    }
-
-    for (i = 0; i < ARRAY_SIZE (PROBABILISTIC_PREFIX); i++) {
-       if (strcmp (name, PROBABILISTIC_PREFIX[i].name) == 0)
-           return PROBABILISTIC_PREFIX[i].prefix;
+    for (i = 0; i < ARRAY_SIZE (prefix_table); i++) {
+       if (strcmp (name, prefix_table[i].name) == 0)
+           return prefix_table[i].prefix;
     }
 
     INTERNAL_ERROR ("No prefix exists for '%s'\n", name);
@@ -1053,15 +1045,16 @@ notmuch_database_open_verbose (const char *path,
        notmuch->query_parser->add_valuerangeprocessor (notmuch->date_range_processor);
        notmuch->query_parser->add_valuerangeprocessor (notmuch->last_mod_range_processor);
 
-       for (i = 0; i < ARRAY_SIZE (BOOLEAN_PREFIX_EXTERNAL); i++) {
-           prefix_t *prefix = &BOOLEAN_PREFIX_EXTERNAL[i];
-           notmuch->query_parser->add_boolean_prefix (prefix->name,
-                                                      prefix->prefix);
-       }
-
-       for (i = 0; i < ARRAY_SIZE (PROBABILISTIC_PREFIX); i++) {
-           prefix_t *prefix = &PROBABILISTIC_PREFIX[i];
-           notmuch->query_parser->add_prefix (prefix->name, prefix->prefix);
+       for (i = 0; i < ARRAY_SIZE (prefix_table); i++) {
+           const prefix_t *prefix = &prefix_table[i];
+           if (prefix->flags & NOTMUCH_FIELD_EXTERNAL) {
+               if (prefix->flags & NOTMUCH_FIELD_PROBABILISTIC) {
+                   notmuch->query_parser->add_prefix (prefix->name, prefix->prefix);
+               } else {
+                   notmuch->query_parser->add_boolean_prefix (prefix->name,
+                                                              prefix->prefix);
+               }
+           }
        }
     } catch (const Xapian::Error &error) {
        IGNORE_RESULT (asprintf (&message, "A Xapian exception occurred opening database: %s\n",