src/include/utils/varlena.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * varlena.h
   4  *        Functions for the variable-length built-in types.
   5  *
   6  * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  * src/include/utils/varlena.h
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13 #ifndef VARLENA_H
  14 #define VARLENA_H
  15
  16 #include "nodes/pg_list.h"
  17 #include "utils/sortsupport.h"
  18
  19 extern int      varstr_cmp(const char *arg1, int len1, const char *arg2, int len2, Oid collid);
  20 extern void varstr_sortsupport(SortSupport ssup, Oid typid, Oid collid);
  21 extern int      varstr_levenshtein(const char *source, int slen,
  22                                                            const char *target, int tlen,
  23                                                            int ins_c, int del_c, int sub_c,
  24                                                            bool trusted);
  25 extern int      varstr_levenshtein_less_equal(const char *source, int slen,
  26                                                                                   const char *target, int tlen,
  27                                                                                   int ins_c, int del_c, int sub_c,
  28                                                                                   int max_d, bool trusted);
  29 extern List *textToQualifiedNameList(text *textval);
  30 extern bool SplitIdentifierString(char *rawstring, char separator,
  31                                                                   List **namelist);
  32 extern bool SplitDirectoriesString(char *rawstring, char separator,
  33                                                                    List **namelist);
  34 extern bool SplitGUCList(char *rawstring, char separator,
  35                                                  List **namelist);
  36 extern text *replace_text_regexp(text *src_text, text *pattern_text,
  37                                                                  text *replace_text,
  38                                                                  int cflags, Oid collation,
  39                                                                  int search_start, int n);
  40
  41 typedef struct ClosestMatchState
  42 {
  43         const char *source;
  44         int                     min_d;
  45         int                     max_d;
  46         const char *match;
  47 }                       ClosestMatchState;
  48
  49 extern void initClosestMatch(ClosestMatchState *state, const char *source, int max_d);
  50 extern void updateClosestMatch(ClosestMatchState *state, const char *candidate);
  51 extern const char *getClosestMatch(ClosestMatchState *state);
  52
  53 #endif