Fixed [bugs:1032]: app_data field of DBT structure is not always copi…

…ed when call bdb_bt_compare

* libcob/fileio.c: fixed Bug #1032 by always using global thread-static variable bdb_app_data pointer to access the collating sequence function

libcob/ChangeLog

@@ -1,4 +1,9 @@
 
+2024-12-11  Emilien Lemaire <[email protected]>
+
+	* fileio.c: fixed Bug #1032 by always using global thread-static variable
+	  bdb_app_data pointer to access the collating sequence function
+
 2024-12-08  Simon Sobisch <[email protected]>
 
 	* screenio.c [WITH_PANELS]: replace use of ncurses extension ceiling_panel()

libcob/fileio.c

@@ -690,12 +690,14 @@ static unsigned int	bdb_lock_id = 0;
 	key.data = fld->data;			\
 	key.size = (cob_dbtsize_t) fld->size
 
-#if (DB_VERSION_MAJOR > 4) || ((DB_VERSION_MAJOR == 4) && (DB_VERSION_MINOR > 0))
+#if 0 /* while the fields are part of DBT since 4.1, and were made part of the
+         public API with 6.0 (DB_VERSION_FAMILY 12) this field is not always
+         copied when passed to custom compare functions, see bug 1032 */
 #define DBT_SET_APP_DATA(key,data)	((key)->app_data = (data))
 #define DBT_GET_APP_DATA(key)		((key)->app_data)
 #else
-/* Workaround for older BDB versions that do not have app_data in DBT */
-static void		*bdb_app_data = NULL;
+/* Used to save the collating sequence function */
+COB_TLS void		*bdb_app_data = NULL;
 #define DBT_SET_APP_DATA(key,data)	((void)(key), bdb_app_data = (data))
 #define DBT_GET_APP_DATA(key)		((void)(key), bdb_app_data)
 #endif

tests/testsuite.src/run_file.at

@@ -14653,3 +14653,98 @@ AT_CHECK([$COBCRUN_DIRECT ./prog2 > prog2.txt])
 AT_CHECK([diff expected.txt prog2.txt])
 
 AT_CLEANUP
+
+
+AT_SETUP([DELETE WITH COLLATING SEQUENCE])
+AT_KEYWORDS([runfile WRITE DELETE READ EBCDIC])
+
+AT_SKIP_IF([test "$COB_HAS_ISAM" != "db"])
+AT_DATA([prog.cob], [
+       IDENTIFICATION DIVISION.
+       PROGRAM-ID. READDEL.
+       ENVIRONMENT DIVISION.
+       CONFIGURATION SECTION.
+       INPUT-OUTPUT SECTION.
+       FILE-CONTROL.
+
+           SELECT READDEL ASSIGN EXTERNAL READDEL
+             ORGANIZATION INDEXED
+             ACCESS MODE DYNAMIC
+             RECORD KEY READDEL-KEY
+             FILE STATUS STA-READDEL.
+
+       DATA DIVISION.
+       FILE SECTION.
+
+       FD  READDEL.
+       01  READDEL-REC.
+        02 READDEL-KEY.
+           05 READDEL-KEY-NUM   PIC S9(15).
+        02 READDEL-VALUE.
+           05 READDEL-STRING    PIC X(10).
+           05 READDEL-NUM       PIC S9(27) OCCURS 10 TIMES.
+      *>
+
+      *>----------------------*
+       WORKING-STORAGE SECTION.
+      *>----------------------*
+
+       01 STA-READDEL PIC X(2).
+       01 END-READDEL PIC 9(1).
+       01 WS-COUNT PIC S9(2) VALUE 0.
+
+      *>------------------*
+       PROCEDURE DIVISION.
+      *>------------------*
+           MOVE 0 TO END-READDEL.
+           OPEN OUTPUT READDEL.
+           PERFORM 20 TIMES
+             MOVE WS-COUNT TO READDEL-KEY-NUM
+             MOVE "READDELNUM" TO READDEL-STRING
+             MOVE WS-COUNT TO READDEL-NUM(1)
+             MOVE WS-COUNT TO READDEL-NUM(2)
+             MOVE WS-COUNT TO READDEL-NUM(3)
+             MOVE WS-COUNT TO READDEL-NUM(4)
+             MOVE WS-COUNT TO READDEL-NUM(5)
+             MOVE WS-COUNT TO READDEL-NUM(6)
+             MOVE WS-COUNT TO READDEL-NUM(7)
+             MOVE WS-COUNT TO READDEL-NUM(8)
+             MOVE WS-COUNT TO READDEL-NUM(9)
+             MOVE WS-COUNT TO READDEL-NUM(10)
+             WRITE READDEL-REC
+               INVALID KEY
+                 DISPLAY "INVALID KEY " READDEL-KEY
+                 STOP RUN
+             END-WRITE
+             ADD 1 TO WS-COUNT
+           END-PERFORM.
+           CLOSE READDEL.
+           MOVE LOW-VALUE TO READDEL-KEY.
+           OPEN I-O READDEL.
+           START READDEL KEY IS > READDEL-KEY
+             INVALID KEY
+               DISPLAY "ERR START READDEL=" STA-READDEL
+               MOVE 1 TO END-READDEL
+           END-START.
+           PERFORM UNTIL END-READDEL = 1
+             READ READDEL NEXT RECORD
+               AT END
+                 MOVE 1 TO END-READDEL
+               NOT AT END
+                 DELETE READDEL
+                   INVALID KEY
+                     DISPLAY "ERR DELETE KEY=" READDEL-KEY
+                             " / STATUS=" STA-READDEL
+                 END-DELETE
+             END-READ
+           END-PERFORM.
+           CLOSE READDEL.
+           STOP RUN.
+
+
+])
+
+AT_CHECK([$COMPILE -fdefault-file-colseq=EBCDIC prog.cob])
+AT_CHECK([$COBCRUN_DIRECT ./prog])
+
+AT_CLEANUP