lists.h

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/*
 * Copyright 1993, 1995 Christopher Seiwald.
 *
 * This file is part of Jam - see jam.c for Copyright information.
 */

/*
 * lists.h - the LIST structure and routines to manipulate them
 *
 * The whole of jam relies on lists of strings as a datatype.  This
 * module, in conjunction with newstr.c, handles these relatively
 * efficiently.
 *
 * Structures defined:
 *
 *  LIST - list of strings
 *  LOL - list of LISTs
 *
 * External routines:
 *
 *  list_new()      - tack a string onto the end of a list of strings
 *  list_copy()     - copy a whole list of strings
 *  list_append()   - append a list onto another one, returning total
 *  list_sublist()  - copy a subset of a list of strings
 *  list_free()     - free a list of strings
 *  list_print()    - print a list of strings to stdout
 *  list_printq()   - print a list of safely quoted strings to a file
 *  list_length()   - return the number of items in the list
 *
 *  lol_init()  - initialize a LOL (list of lists)
 *  lol_add()   - append a LIST onto an LOL
 *  lol_free()  - free the LOL and its LISTs
 *  lol_get()   - return one of the LISTs in the LOL
 *  lol_print() - debug print LISTS separated by ":"
 *
 * Changes:
 *
 * 12/09/02 (seiwald) - new list_printq() for writing lists to Jambase
 * 11/04/02 (seiwald) - const-ing for string literals
 * 10/22/02 (seiwald) - list_new() now does its own newstr()/copystr()
 * 08/23/94 (seiwald) - new list_append()
 * 04/13/94 (seiwald) - added shorthand L0 for null list pointer
 */

/*
 * LIST - list of strings
 */

typedef struct _list LIST;

struct _list {
    LIST        *next;
    LIST        *tail;      /* only valid in head node */
    const char  *string;    /* private copy */
} ;

/*
 * LOL - list of LISTs
 */

typedef struct _lol LOL;

# define LOL_MAX 9

struct _lol {
    int count;
    LIST    *list[ LOL_MAX ];
} ;

LIST *  list_append( LIST *l, LIST *nl );
LIST *  list_copy( LIST *l, LIST  *nl );
void    list_free( LIST *head );
LIST *  list_new( LIST *head, const char *string, int copy );
void    list_print( LIST *l );
int     list_length( LIST *l );
LIST *  list_sublist( LIST *l, int start, int count );

# define list_next( l ) ((l)->next)

# define L0 ((LIST *)0)

void    lol_add( LOL *lol, LIST *l );
void    lol_init( LOL *lol );
void    lol_free( LOL *lol );
LIST *  lol_get( LOL *lol, int i );
void    lol_print( LOL *lol );

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