src/lists.h

   1 /*
   2  * Copyright 1993, 1995 Christopher Seiwald.
   3  *
   4  * This file is part of Jam - see jam.c for Copyright information.
   5  */
   6 /*
   7  * lists.h - the LIST structure and routines to manipulate them
   8  *
   9  * The whole of jam relies on lists of strings as a datatype.  This
  10  * module, in conjunction with newstr.c, handles these relatively
  11  * efficiently.
  12  *
  13  * Structures defined:
  14  *
  15  *  LIST - list of strings
  16  *  LOL - list of LISTs
  17  *
  18  * External routines:
  19  *
  20  *  list_append() - append a list onto another one, returning total
  21  *  list_new() - tack a string onto the end of a list of strings
  22  *  list_copy() - copy a whole list of strings
  23  *  list_sublist() - copy a subset of a list of strings
  24  *  list_free() - free a list of strings
  25  *  list_print() - print a list of strings to stdout
  26  *  list_printq() - print a list of safely quoted strings to a file
  27  *  list_length() - return the number of items in the list
  28  *
  29  *  lol_init() - initialize a LOL (list of lists)
  30  *  lol_add() - append a LIST onto an LOL
  31  *  lol_free() - free the LOL and its LISTs
  32  *  lol_get() - return one of the LISTs in the LOL
  33  *  lol_print() - debug print LISTS separated by ":"
  34  *
  35  * 04/13/94 (seiwald) - added shorthand L0 for null list pointer
  36  * 08/23/94 (seiwald) - new list_append()
  37  * 10/22/02 (seiwald) - list_new() now does its own newstr()/copystr()
  38  * 11/04/02 (seiwald) - const-ing for string literals
  39  * 12/09/02 (seiwald) - new list_printq() for writing lists to Jambase
  40  */
  41 #ifndef JAMH_LISTS_H
  42 #define JAMH_LISTS_H
  43
  44
  45 /* LIST - list of strings */
  46 typedef struct _list LIST;
  47 struct _list {
  48   LIST *next;
  49   LIST *tail; /* only valid in head node */
  50   const char *string; /* private copy */
  51 };
  52
  53
  54 /*  LOL - list of LISTs */
  55 #define LOL_MAX  (64)
  56 typedef struct _lol LOL;
  57 struct _lol {
  58   int count;
  59   LIST *list[LOL_MAX];
  60 };
  61
  62
  63 extern LIST *list_append (LIST *l, LIST *nl);
  64 extern LIST *list_copy (LIST *l, LIST *nl);
  65 extern void list_free (LIST *head);
  66 extern LIST *list_new (LIST *head, const char *string, int copy);
  67 extern void list_print (LIST *l);
  68 extern int list_length (LIST *l) JAMFA_PURE;
  69 extern LIST *list_sublist (LIST *l, int start, int count);
  70 extern LIST *list_sort (LIST *l);
  71
  72 extern LIST *list_removeall (LIST *l, LIST *nl);
  73
  74 #define list_next(l)  ((l)->next)
  75
  76 #define L0  ((LIST *)0)
  77
  78 extern void lol_add (LOL *lol, LIST *l);
  79 extern void lol_init (LOL *lol);
  80 extern void lol_free (LOL *lol);
  81 extern LIST *lol_get (LOL *lol, int i) JAMFA_PURE;
  82 extern void lol_print (LOL *lol);
  83
  84
  85 #endif