From: ian <ian>
Date: Sat, 11 Feb 2006 19:08:36 +0000 (+0000)
Subject: working on lookups
X-Git-Tag: debian/1.1.1~69
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=chiark-tcl.git;a=commitdiff_plain;h=06eaf80321d3b1a19358927c18d0b95523b9c74b

working on lookups
---

diff --git a/cdb/writeable.c b/cdb/writeable.c
index 14d81ad..fb7a67f 100644
--- a/cdb/writeable.c
+++ b/cdb/writeable.c
@@ -847,19 +847,73 @@ int cht_do_cdbwr_delete(ClientData cd, Tcl_Interp *ip, void *rw_v,
 
 /*---------- Lookups ----------*/
 
-static int lookup(Tcl_Interp *ip, Rw *rw, const char *key, ) {
-  const HashValue val;
+static int wrlookup(Tcl_Interp *ip, void *rw_v, const char *key,
+		    const Byte **data_r, int *len_r /* -1 => notfound */) {
+  Rw *rw= rw_v;
+  const HashValue *val;
+  int r, l;
 
   val= ht_lookup(&rw->logincore, key);
-  if (!val) {
-    cdb_ &rw->cdb
+  if (val) {
+    if (val->len) { *data_r= val->data; *len_r= val->len; return TCL_OK; }
+    else { *data_r= 0; *len_r= -1; return TCL_OK; }
+  }
 
-    return notfound;
+  r= cdb_find(&rw->cdb, key, strlen(key));
+  if (!r) { *data_r= 0; *len_r= -1; return TCL_OK; }
+  if (r<0) return cht_posixerr(ip, errno, "cdb_find failed");
+  assert(r==1);
+  *len_r= cdb_datalen(&rw->cdb);
+  assert(*len_r > 0);
+  *data_r= cdb_getdata(&rw->cdb);
+  if (!*data_r) return cht_posixerr(ip, errno, "cdb_getdata failed");
+  return TCL_OK;
+} 
+
+int cht_cdb_dosomelookup(ClientData cd, Tcl_Interp *ip, void *db_v,
+			 int (*somelookup)(Tcl_Interp *ip, void *db_v,
+					   const char *key,
+					   const Byte **data_r, int *len_r),
+			 const char *key, Tcl_Obj *def,
+			 Tcl_Obj **result) {
+  int r, len;
+  const Byte *data;
   
-
-int cht_do_cdbwr_lookup(ClientData cd, Tcl_Interp *ip, void *db,
-			const char *key, Tcl_Obj *def, Tcl_Obj **result) {
+  r= somelookup(ip, db_v, key, &data, &len);
+  if (r) return r;
+  if (len>0) {
+    r= storeanswer();
+  }
+  if (def) {
+    *result= def;
+    return TCL_OK;
+  }
+  return cht_staticerr(ip, "cdbwr lookup key not found", "CDB NOTFOUND");
   
+  if (len<0) *result= def;
+  else *result= Tcl_NewStringObj(
 }
 
-int cht_do_cdbwr_lookup_hb(ClientData cd, Tcl_Interp *ip, void *db, const char *key, HBytes_Value def, HBytes_Value *result);
+static int storeanswer
+  
+int cht_do_cdbwr_lookup(ClientData cd, Tcl_Interp *ip, void *rw_v,
+			const char *key, HBytes_Value def,
+			HBytes_Value *result) {
+    *result= Tcl_NewStringObj(data, len);
+    if (!*result) return cht_staticerr(ip, "Tcl_NewStringObj failed for"
+          " lookup (utf-8 encoding problem?)", "CDB BADSTRING");
+    return TCL_OK;
+int cht_do_cdbwr_lookup_hb(ClientData cd, Tcl_Interp *ip, void *rw_v,
+			   const char *key, HBytes_Value def,
+			   HBytes_Value *result) {
+  Rw *rw= rw_v;
+  int r;
+
+  r= lookup(ip, rw, key, &data, &len);
+  if (r) return r;
+  if (len>0) {
+    cht_hb_array(result, data, len);
+    return TCL_OK;
+  }
+  if (!HBYTES_ISSENTINEL(def)) {
+    cht_hb_array(result, cht_hb_data(&def), cht_hb