Add case-insensitive lookup support to BlueSky core.

[bluesky.git] / bluesky / bluesky.h

diff --git a/bluesky/bluesky.h b/bluesky/bluesky.h
index 1d0b0b1..f37a537 100644 (file)
--- a/bluesky/bluesky.h
+++ b/bluesky/bluesky.h
@@ -10,6 +10,7 @@
 #define _BLUESKY_H
 
 #include <stdint.h>
+#include <inttypes.h>
 #include <glib.h>
 
 #ifdef __cplusplus
@@ -18,6 +19,8 @@ extern "C" {
 
 void bluesky_init(void);
 
+gchar *bluesky_lowercase(const gchar *s);
+
 /* Reference-counted blocks of memory, used for passing data in and out of
  * storage backends and in other places. */
 typedef struct {
@@ -128,7 +131,12 @@ typedef struct {
      * that we don't exhaust the identifier space. */
     uint64_t inum;
 
-    uint64_t change_count;      /* Incremented each with each change made */
+    /* change_count is increased with every operation which modifies the inode,
+     * and can be used to determine if cached data is still valid.
+     * change_commit is the value of change_count when the inode was last
+     * committed to stable storage. */
+    uint64_t change_count, change_commit;
+
     int64_t atime;              /* Microseconds since the Unix epoch */
     int64_t ctime;
     int64_t mtime;
@@ -141,6 +149,7 @@ typedef struct {
     /* Directory-specific fields */
     GSequence *dirents;         /* List of entries for READDIR */
     GHashTable *dirhash;        /* Hash table by name for LOOKUP */
+    GHashTable *dirhash_folded; /* As above, but case-folded */
     uint64_t parent_inum;       /* inode for ".."; 0 if the root directory */
 } BlueSkyInode;
 
@@ -151,6 +160,7 @@ typedef struct {
  * is used to provide a stable key for restarting a READDIR call. */
 typedef struct {
     gchar *name;
+    gchar *name_folded;         /* Name, folded for case-insensitive lookup */
     uint32_t cookie;
     uint64_t inum;
 } BlueSkyDirent;
@@ -186,6 +196,7 @@ void bluesky_insert_inode(BlueSkyFS *fs, BlueSkyInode *inode);
 void bluesky_dirent_destroy(gpointer dirent);
 uint64_t bluesky_directory_hash(gchar *name);
 uint64_t bluesky_directory_lookup(BlueSkyInode *inode, gchar *name);
+uint64_t bluesky_directory_ilookup(BlueSkyInode *inode, gchar *name);
 gboolean bluesky_directory_insert(BlueSkyInode *dir, gchar *name,
                                   uint64_t inum);
 void bluesky_directory_dump(BlueSkyInode *dir);