/* Definitions of dependency data structures for GNU Make.
Copyright (C) 1988-2020 Free Software Foundation, Inc.
This file is part of GNU Make.

GNU Make is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.

GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with
this program.  If not, see <http://www.gnu.org/licenses/>.  */


/* Structure used in chains of names, for parsing and globbing.  */

#define NAMESEQ(_t)     \
    _t *next;           \
    const char *name

struct nameseq
  {
    NAMESEQ (struct nameseq);
  };

/* Flag bits for the second argument to 'read_makefile'.
   These flags are saved in the 'flags' field of each
   'struct goaldep' in the chain returned by 'read_all_makefiles'.  */

#define RM_NO_DEFAULT_GOAL      (1 << 0) /* Do not set default goal.  */
#define RM_INCLUDED             (1 << 1) /* Search makefile search path.  */
#define RM_DONTCARE             (1 << 2) /* No error if it doesn't exist.  */
#define RM_NO_TILDE             (1 << 3) /* Don't expand ~ in file name.  */
#define RM_NOFLAG               0

/* Structure representing one dependency of a file.
   Each struct file's 'deps' points to a chain of these, through 'next'.
   'stem' is the stem for this dep line of static pattern rule or NULL.  */

#define DEP(_t)                                 \
    NAMESEQ (_t);                               \
    struct file *file;                          \
    const char *stem;                           \
    unsigned int flags : 8;                     \
    unsigned int changed : 1;                   \
    unsigned int ignore_mtime : 1;              \
    unsigned int staticpattern : 1;             \
    unsigned int need_2nd_expansion : 1;        \
    unsigned int ignore_automatic_vars : 1

struct dep
  {
    DEP (struct dep);
  };

/* Structure representing one goal.
   The goals to be built constitute a chain of these, chained through 'next'.
   'stem' is not used, but it's simpler to include and ignore it.  */

struct goaldep
  {
    DEP (struct goaldep);
    int error;
    floc floc;
  };

/* Options for parsing lists of filenames.  */

#define PARSEFS_NONE    0x0000
#define PARSEFS_NOSTRIP 0x0001
#define PARSEFS_NOAR    0x0002
#define PARSEFS_NOGLOB  0x0004
#define PARSEFS_EXISTS  0x0008
#define PARSEFS_NOCACHE 0x0010
#define PARSEFS_ONEWORD 0x0020

#define PARSE_FILE_SEQ(_s,_t,_c,_p,_f) \
            (_t *)parse_file_seq ((_s),sizeof (_t),(_c),(_p),(_f))
#define PARSE_SIMPLE_SEQ(_s,_t) \
            (_t *)parse_file_seq ((_s),sizeof (_t),MAP_NUL,NULL,PARSEFS_NONE)

#ifdef VMS
void *parse_file_seq ();
#else
void *parse_file_seq (char **stringp, size_t size,
                      int stopmap, const char *prefix, int flags);
#endif

char *tilde_expand (const char *name);

#ifndef NO_ARCHIVES
struct nameseq *ar_glob (const char *arname, const char *member_pattern, size_t size);
#endif

#define dep_name(d)        ((d)->name ? (d)->name : (d)->file->name)

#define alloc_seq_elt(_t)   xcalloc (sizeof (_t))
void free_ns_chain (struct nameseq *n);

#if defined(MAKE_MAINTAINER_MODE) && defined(__GNUC__) && !defined(__STRICT_ANSI__)
/* Use inline to get real type-checking.  */
#define SI static inline
SI struct nameseq *alloc_ns()      { return alloc_seq_elt (struct nameseq); }
SI struct dep *alloc_dep()         { return alloc_seq_elt (struct dep); }
SI struct goaldep *alloc_goaldep() { return alloc_seq_elt (struct goaldep); }

SI void free_ns(struct nameseq *n)      { free (n); }
SI void free_dep(struct dep *d)         { free_ns ((struct nameseq *)d); }
SI void free_goaldep(struct goaldep *g) { free_dep ((struct dep *)g); }

SI void free_dep_chain(struct dep *d)      { free_ns_chain((struct nameseq *)d); }
SI void free_goal_chain(struct goaldep *g) { free_dep_chain((struct dep *)g); }
#else
# define alloc_ns()          alloc_seq_elt (struct nameseq)
# define alloc_dep()         alloc_seq_elt (struct dep)
# define alloc_goaldep()     alloc_seq_elt (struct goaldep)

# define free_ns(_n)         free (_n)
# define free_dep(_d)        free_ns (_d)
# define free_goaldep(_g)    free_dep (_g)

# define free_dep_chain(_d)  free_ns_chain ((struct nameseq *)(_d))
# define free_goal_chain(_g) free_ns_chain ((struct nameseq *)(_g))
#endif

struct dep *copy_dep_chain (const struct dep *d);

struct goaldep *read_all_makefiles (const char **makefiles);
void eval_buffer (char *buffer, const floc *floc);
enum update_status update_goal_chain (struct goaldep *goals);