/* 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.
   explicit is set when implicit rule search is performed and the prerequisite
   does not contain %. When explicit is set the file is not intermediate.  */


#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;     \
    unsigned int is_explicit : 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);
