simple_list.h

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/*-------------------------------------------------------------------------
 *
 * Simple list facilities for frontend code
 *
 * Data structures for simple lists of OIDs, strings, and pointers.  The
 * support for these is very primitive compared to the backend's List
 * facilities, but it's all we need in, eg, pg_dump.
 *
 *
 * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/fe_utils/simple_list.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef SIMPLE_LIST_H
#define SIMPLE_LIST_H
 
typedef struct SimpleOidListCell
{
    struct SimpleOidListCell *next;
    Oid         val;
} SimpleOidListCell;
 
typedef struct SimpleOidList
{
    SimpleOidListCell *head;
    SimpleOidListCell *tail;
} SimpleOidList;
 
typedef struct SimpleStringListCell
{
    struct SimpleStringListCell *next;
    bool        touched;        /* true, when this string was searched and
                                 * touched */
    char        val[FLEXIBLE_ARRAY_MEMBER]; /* null-terminated string here */
} SimpleStringListCell;
 
typedef struct SimpleStringList
{
    SimpleStringListCell *head;
    SimpleStringListCell *tail;
} SimpleStringList;
 
typedef struct SimplePtrListCell
{
    struct SimplePtrListCell *next;
    void       *ptr;
} SimplePtrListCell;
 
typedef struct SimplePtrList
{
    SimplePtrListCell *head;
    SimplePtrListCell *tail;
} SimplePtrList;
 
extern void simple_oid_list_append(SimpleOidList *list, Oid val);
extern bool simple_oid_list_member(SimpleOidList *list, Oid val);
extern void simple_oid_list_destroy(SimpleOidList *list);
 
extern void simple_string_list_append(SimpleStringList *list, const char *val);
extern bool simple_string_list_member(SimpleStringList *list, const char *val);
extern void simple_string_list_destroy(SimpleStringList *list);
 
extern const char *simple_string_list_not_touched(SimpleStringList *list);
 
extern void simple_ptr_list_append(SimplePtrList *list, void *ptr);
extern void simple_ptr_list_destroy(SimplePtrList *list);
 
#endif                          /* SIMPLE_LIST_H */