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diff --git a/yarrg/rscommon.h b/yarrg/rscommon.h
index 658bbdd..d91765e 100644
--- a/yarrg/rscommon.h
+++ b/yarrg/rscommon.h
@@ -1,14 +1,101 @@
 #ifndef RSCOMMON_H
 #define RSCOMMON_H
 
-#include <stdio.h>
-
 #include <sqlite3.h>
-#include <assert.h>
-#include <stdlib.h>
 
-extern struct sqlite *db;
+#define DEBUG_FLAG_LIST				\
+   DF(sql)					\
+   DF(sql2)					\
+   DF(value)					\
+   DF(search)					\
+   DF(check)					\
+   DF(lp)
+
+#define debug stdout
+#define DEBUG_DEV "/dev/stdout"
+
+#include "common.h"
+
+
+#define SQL_MUST( call ) ({						 \
+    /* `call' is an expression returning result, using  const char *sqe; \
+     * chk1 and chk2 are blocks using sqe and  int sqr; */		 \
+    const char *sql_must_call_string= #call;				 \
+    int sqr;								 \
+    if (DEBUGP(sql2)) fprintf(stderr,"SQL %s", sql_must_call_string);	 \
+    sqr= (call);							 \
+    if (DEBUGP(sql2)) fprintf(stderr," = %d\n", sqr);			 \
+    if (sqr) sql_fatal("(unknown)", sqr, sql_must_call_string);		 \
+  })									 \
+
+void sql_fatal(const char *stmt_what, int sqr, const char *act_what) NORET;
+
+#define SQL_STEP(ssh) (sql_step((ssh), #ssh, __FILE__, __LINE__))
+int sql_step(sqlite3_stmt *ssh, const char *ssh_string,
+	     const char *file, int line);
+
+#define SQL_DISTINCT_DECL(cols, nintcols)	\
+  int cols[nintcols];				\
+  cols[0]= -1;
+#define SQL_DISTINCT_STEP(ssh, cols, nkeycols)				 \
+  (sql_step_distinct((ssh), #ssh, __FILE__, __LINE__,			 \
+		     (cols), sizeof((cols))/sizeof((cols)[0]), nkeycols))
+int sql_step_distinct(sqlite3_stmt *ssh, const char *ssh_string,
+		      const char *file, int line,
+		      int *cols, int ncols, int nkeycols);
+   /* These work if we're making a query whose columns consist of:
+    *  - keys: integer column(s) on which the results are sorted by the query
+    *  - consequences: zero or more integer cols strictly dependent on the keys
+    *  - extra: zero or more further (possibly non-integer) columns
+    *
+    * Call SQL_DISTINCT_DECL, passing intcols = the total number of keys and
+    * consequences; it will declare  int cols[intfields];
+    *
+    * Then each SQL_DISTINCT_STEP is like SQL_STEP only you have to
+    * pass the number of key columns and it only returns rows with
+    * distinct keys.  Rows with all-identical keys are asserted to
+    * have identical consequences.  After each call to
+    * SQL_DISTINCT_STEP the keys and consequences will be stored in
+    * cols.
+    */
+
+int sql_single_int(const char *stmt);
+
+#define SQL_PREPARE(ss,stmt) ((ss)= sql_prepare((stmt),#ss))
+sqlite3_stmt *sql_prepare(const char *stmt, const char *what);
+
+#define SQL_BIND(ss,index,value) (sql_bind((ss),(index),(value),#ss,#value))
+void sql_bind(sqlite3_stmt *ss, int index, int value,
+	      const char *ss_what, const char *val_what);
+
+#define MAX_ROUTELEN 20
+
+extern sqlite3 *db;
+
+void setup_sql(void);
+
+
+typedef struct {
+  double distance_loss_factor;
+  struct TradesBlock *trades;
+  double route_tail_value;
+} IslandPair;
+
+IslandPair *ipair_get(int si, int di);
+
+double value_route(int nislands, const int *islands, int exclude_arbitrage);
+void setup_value(void);
+
+void setup_search(void);
+void search(int start_isle);
+
+extern double max_mass, max_volu, max_capi;
+extern double distance_loss_factor_per_league;
+extern int max_dist;
+
+#define LOSS_FACTOR_PER_DELAY_SLOT (1-1e-8)
+
+extern int islandtablesz;
 
-void value_route(int nislands, const int *islands);
 
 #endif /*RSCOMMON_H*/