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116 lines
5.1 KiB
C
116 lines
5.1 KiB
C
/* Definitions for using variables in GNU Make.
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Copyright (C) 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Make is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Make; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Codes in a variable definition saying where the definition came from.
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Increasing numeric values signify less-overridable definitions. */
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enum variable_origin
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{
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o_default, /* Variable from the default set. */
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o_env, /* Variable from environment. */
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o_file, /* Variable given in a makefile. */
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o_env_override, /* Variable from environment, if -e. */
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o_command, /* Variable given by user. */
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o_override, /* Variable from an `override' directive. */
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o_automatic, /* Automatic variable -- cannot be set. */
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o_invalid /* Core dump time. */
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};
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/* Structure that represents one variable definition.
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Each bucket of the hash table is a chain of these,
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chained through `next'. */
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struct variable
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{
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struct variable *next; /* Link in the chain. */
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char *name; /* Variable name. */
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char *value; /* Variable value. */
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enum variable_origin
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origin ENUM_BITFIELD (3); /* Variable origin. */
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unsigned int recursive:1; /* Gets recursively re-evaluated. */
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unsigned int expanding:1; /* Nonzero if currently being expanded. */
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unsigned int per_target:1; /* Nonzero if a target-specific variable. */
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enum variable_export
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{
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v_export, /* Export this variable. */
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v_noexport, /* Don't export this variable. */
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v_ifset, /* Export it if it has a non-default value. */
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v_default /* Decide in target_environment. */
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} export ENUM_BITFIELD (2);
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};
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/* Structure that represents a variable set. */
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struct variable_set
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{
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struct variable **table; /* Hash table of variables. */
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unsigned int buckets; /* Number of hash buckets in `table'. */
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};
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/* Structure that represents a list of variable sets. */
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struct variable_set_list
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{
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struct variable_set_list *next; /* Link in the chain. */
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struct variable_set *set; /* Variable set. */
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};
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extern char *variable_buffer;
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extern struct variable_set_list *current_variable_set_list;
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/* expand.c */
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extern char *variable_buffer_output PARAMS ((char *ptr, char *string, unsigned int length));
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extern char *variable_expand PARAMS ((char *line));
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extern char *allocated_variable_expand_for_file PARAMS ((char *line, struct file *file));
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#define allocated_variable_expand(line) \
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allocated_variable_expand_for_file (line, (struct file *) 0)
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extern char *expand_argument PARAMS ((char *str, char *end));
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extern char *variable_expand_string PARAMS ((char *line, char *string,
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long length));
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/* function.c */
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extern int handle_function PARAMS ((char **op, char **stringp));
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extern int pattern_matches PARAMS ((char *pattern, char *percent, char *str));
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extern char *subst_expand PARAMS ((char *o, char *text, char *subst, char *replace,
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unsigned int slen, unsigned int rlen, int by_word, int suffix_only));
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extern char *patsubst_expand PARAMS ((char *o, char *text, char *pattern, char *replace,
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char *pattern_percent, char *replace_percent));
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/* expand.c */
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extern char *recursively_expand PARAMS ((struct variable *v));
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/* variable.c */
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extern struct variable_set_list *create_new_variable_set PARAMS ((void));
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extern struct variable_set_list *push_new_variable_scope PARAMS ((void));
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extern void pop_variable_scope PARAMS ((void));
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extern void define_automatic_variables PARAMS ((void));
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extern void initialize_file_variables PARAMS ((struct file *file));
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extern void print_file_variables PARAMS ((struct file *file));
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extern void print_variable_set PARAMS ((struct variable_set *set, char *prefix));
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extern void merge_variable_set_lists PARAMS ((struct variable_set_list **setlist0, struct variable_set_list *setlist1));
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extern struct variable *try_variable_definition PARAMS ((const struct floc *flocp, char *line, enum variable_origin origin));
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extern struct variable *lookup_variable PARAMS ((char *name, unsigned int length));
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extern struct variable *define_variable PARAMS ((char *name, unsigned int length, char *value,
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enum variable_origin origin, int recursive));
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extern struct variable *define_variable_in_set PARAMS ((char *name, unsigned int length,
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char *value, enum variable_origin origin, int recursive, struct variable_set *set));
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extern struct variable *define_variable_for_file PARAMS ((char *name, unsigned int length,
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char *value, enum variable_origin origin, int recursive, struct file *file));
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extern char **target_environment PARAMS ((struct file *file));
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extern int export_all_variables;
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