Re: Add missing const qualifier in ECPG - Mailing list pgsql-patches

From Qingqing Zhou
Subject Re: Add missing const qualifier in ECPG
Date
Msg-id Pine.LNX.4.58.0511151955340.2772@eon.cs
Whole thread Raw
In response to Re: Add missing const qualifier in ECPG  (Peter Eisentraut <peter_e@gmx.net>)
List pgsql-patches

On Sun, 13 Nov 2005, Peter Eisentraut wrote:
> >
> > !     (*stmt)->command = (char *)query;
> >       (*stmt)->connection = connection;
> >       (*stmt)->lineno = lineno;
> >       (*stmt)->compat = compat;
>
> This sort of "cheating" should be avoided.
>

According to Peter's comment, revised patch is attached. It duplicates the
values of the query string and free it at the end of the query. There is
another question -- seems we allow strdup() fails silently in various
places. Shall we do something about it?

Regards,
Qingqing

---

Index: ecpglib/descriptor.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/interfaces/ecpg/ecpglib/descriptor.c,v
retrieving revision 1.12
diff -c -r1.12 descriptor.c
*** ecpglib/descriptor.c    29 Aug 2004 05:06:59 -0000    1.12
--- ecpglib/descriptor.c    16 Nov 2005 00:40:57 -0000
***************
*** 49,55 ****
  }

  bool
! ECPGget_desc_header(int lineno, char *desc_name, int *count)
  {
      PGresult   *ECPGresult;
      struct sqlca_t *sqlca = ECPGget_sqlca();
--- 49,55 ----
  }

  bool
! ECPGget_desc_header(int lineno, const char *desc_name, int *count)
  {
      PGresult   *ECPGresult;
      struct sqlca_t *sqlca = ECPGget_sqlca();
***************
*** 188,194 ****
  }

  bool
! ECPGget_desc(int lineno, char *desc_name, int index,...)
  {
      va_list        args;
      PGresult   *ECPGresult;
--- 188,194 ----
  }

  bool
! ECPGget_desc(int lineno, const char *desc_name, int index,...)
  {
      va_list        args;
      PGresult   *ECPGresult;
***************
*** 431,437 ****
  }

  bool
! ECPGset_desc_header(int lineno, char *desc_name, int count)
  {
      struct descriptor *desc;

--- 431,437 ----
  }

  bool
! ECPGset_desc_header(int lineno, const char *desc_name, int count)
  {
      struct descriptor *desc;

***************
*** 452,458 ****
  }

  bool
! ECPGset_desc(int lineno, char *desc_name, int index,...)
  {
      va_list        args;
      struct descriptor *desc;
--- 452,458 ----
  }

  bool
! ECPGset_desc(int lineno, const char *desc_name, int index,...)
  {
      va_list        args;
      struct descriptor *desc;
Index: ecpglib/execute.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/interfaces/ecpg/ecpglib/execute.c,v
retrieving revision 1.43
diff -c -r1.43 execute.c
*** ecpglib/execute.c    15 Oct 2005 02:49:47 -0000    1.43
--- ecpglib/execute.c    16 Nov 2005 00:40:57 -0000
***************
*** 141,147 ****
   * ind_offset - indicator offset
   */
  static bool
! create_statement(int lineno, int compat, int force_indicator, struct connection * connection, struct statement **
stmt,char *query, va_list ap) 
  {
      struct variable **list = &((*stmt)->inlist);
      enum ECPGttype type;
--- 141,148 ----
   * ind_offset - indicator offset
   */
  static bool
! create_statement(int lineno, int compat, int force_indicator, struct connection * connection, struct statement **
stmt,const char 
! *query, va_list ap)
  {
      struct variable **list = &((*stmt)->inlist);
      enum ECPGttype type;
***************
*** 149,155 ****
      if (!(*stmt = (struct statement *) ECPGalloc(sizeof(struct statement), lineno)))
          return false;

!     (*stmt)->command = query;
      (*stmt)->connection = connection;
      (*stmt)->lineno = lineno;
      (*stmt)->compat = compat;
--- 150,156 ----
      if (!(*stmt = (struct statement *) ECPGalloc(sizeof(struct statement), lineno)))
          return false;

!     (*stmt)->command = strdup(query);
      (*stmt)->connection = connection;
      (*stmt)->lineno = lineno;
      (*stmt)->compat = compat;
***************
*** 224,229 ****
--- 225,231 ----
          return;
      free_variable(stmt->inlist);
      free_variable(stmt->outlist);
+     ECPGfree(stmt->command);
      ECPGfree(stmt);
  }

***************
*** 1359,1365 ****
  }

  bool
! ECPGdo(int lineno, int compat, int force_indicator, const char *connection_name, char *query,...)
  {
      va_list        args;
      struct statement *stmt;
--- 1361,1367 ----
  }

  bool
! ECPGdo(int lineno, int compat, int force_indicator, const char *connection_name, const char *query,...)
  {
      va_list        args;
      struct statement *stmt;
***************
*** 1417,1423 ****
  ECPGdo_descriptor(int line, const char *connection,
                    const char *descriptor, const char *query)
  {
!     return ECPGdo(line, ECPG_COMPAT_PGSQL, true, connection, (char *) query, ECPGt_EOIT,
                    ECPGt_descriptor, descriptor, 0L, 0L, 0L,
                    ECPGt_NO_INDICATOR, NULL, 0L, 0L, 0L, ECPGt_EORT);
  }
--- 1419,1425 ----
  ECPGdo_descriptor(int line, const char *connection,
                    const char *descriptor, const char *query)
  {
!     return ECPGdo(line, ECPG_COMPAT_PGSQL, true, connection, query, ECPGt_EOIT,
                    ECPGt_descriptor, descriptor, 0L, 0L, 0L,
                    ECPGt_NO_INDICATOR, NULL, 0L, 0L, 0L, ECPGt_EORT);
  }
Index: ecpglib/memory.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/interfaces/ecpg/ecpglib/memory.c,v
retrieving revision 1.7
diff -c -r1.7 memory.c
*** ecpglib/memory.c    15 Oct 2005 02:49:47 -0000    1.7
--- ecpglib/memory.c    16 Nov 2005 00:40:57 -0000
***************
*** 11,17 ****
  void
  ECPGfree(void *ptr)
  {
!     free(ptr);
  }

  char *
--- 11,18 ----
  void
  ECPGfree(void *ptr)
  {
!     if (ptr)
!         free(ptr);
  }

  char *
Index: ecpglib/prepare.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/interfaces/ecpg/ecpglib/prepare.c,v
retrieving revision 1.14
diff -c -r1.14 prepare.c
*** ecpglib/prepare.c    15 Oct 2005 02:49:47 -0000    1.14
--- ecpglib/prepare.c    16 Nov 2005 00:40:57 -0000
***************
*** 60,66 ****

  /* handle the EXEC SQL PREPARE statement */
  bool
! ECPGprepare(int lineno, char *name, char *variable)
  {
      struct statement *stmt;
      struct prepared_statement *this;
--- 60,66 ----

  /* handle the EXEC SQL PREPARE statement */
  bool
! ECPGprepare(int lineno, const char *name, const char *variable)
  {
      struct statement *stmt;
      struct prepared_statement *this;
***************
*** 112,118 ****

  /* handle the EXEC SQL DEALLOCATE PREPARE statement */
  bool
! ECPGdeallocate(int lineno, int c, char *name)
  {
      bool        ret = ECPGdeallocate_one(lineno, name);
      enum COMPAT_MODE compat = c;
--- 112,118 ----

  /* handle the EXEC SQL DEALLOCATE PREPARE statement */
  bool
! ECPGdeallocate(int lineno, int c, const char *name)
  {
      bool        ret = ECPGdeallocate_one(lineno, name);
      enum COMPAT_MODE compat = c;
***************
*** 133,139 ****
  }

  bool
! ECPGdeallocate_one(int lineno, char *name)
  {
      struct prepared_statement *this,
                 *prev;
--- 133,139 ----
  }

  bool
! ECPGdeallocate_one(int lineno, const char *name)
  {
      struct prepared_statement *this,
                 *prev;
Index: include/ecpglib.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/interfaces/ecpg/include/ecpglib.h,v
retrieving revision 1.63
diff -c -r1.63 ecpglib.h
*** include/ecpglib.h    5 Jul 2004 09:45:53 -0000    1.63
--- include/ecpglib.h    16 Nov 2005 00:40:57 -0000
***************
*** 48,59 ****
  bool        ECPGsetcommit(int, const char *, const char *);
  bool        ECPGsetconn(int, const char *);
  bool        ECPGconnect(int, int, const char *, const char *, const char *, const char *, int);
! bool        ECPGdo(int, int, int, const char *, char *,...);
  bool        ECPGtrans(int, const char *, const char *);
  bool        ECPGdisconnect(int, const char *);
! bool        ECPGprepare(int, char *, char *);
! bool        ECPGdeallocate(int, int, char *);
! bool        ECPGdeallocate_one(int, char *);
  bool        ECPGdeallocate_all(int);
  char       *ECPGprepared_statement(const char *);

--- 48,59 ----
  bool        ECPGsetcommit(int, const char *, const char *);
  bool        ECPGsetconn(int, const char *);
  bool        ECPGconnect(int, int, const char *, const char *, const char *, const char *, int);
! bool        ECPGdo(int, int, int, const char *, const char *,...);
  bool        ECPGtrans(int, const char *, const char *);
  bool        ECPGdisconnect(int, const char *);
! bool        ECPGprepare(int, const char *, const char *);
! bool        ECPGdeallocate(int, int, const char *);
! bool        ECPGdeallocate_one(int, const char *);
  bool        ECPGdeallocate_all(int);
  char       *ECPGprepared_statement(const char *);

***************
*** 75,84 ****
  bool        ECPGallocate_desc(int line, const char *name);
  void        ECPGraise(int line, int code, const char *sqlstate, const char *str);
  void        ECPGraise_backend(int line, PGresult *result, PGconn *conn, int compat);
! bool        ECPGget_desc_header(int, char *, int *);
! bool        ECPGget_desc(int, char *, int,...);
! bool        ECPGset_desc_header(int, char *, int);
! bool        ECPGset_desc(int, char *, int,...);

  void        ECPGset_noind_null(enum ECPGttype, void *);
  bool        ECPGis_noind_null(enum ECPGttype, void *);
--- 75,84 ----
  bool        ECPGallocate_desc(int line, const char *name);
  void        ECPGraise(int line, int code, const char *sqlstate, const char *str);
  void        ECPGraise_backend(int line, PGresult *result, PGconn *conn, int compat);
! bool        ECPGget_desc_header(int, const char *, int *);
! bool        ECPGget_desc(int, const char *, int,...);
! bool        ECPGset_desc_header(int, const char *, int);
! bool        ECPGset_desc(int, const char *, int,...);

  void        ECPGset_noind_null(enum ECPGttype, void *);
  bool        ECPGis_noind_null(enum ECPGttype, void *);

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