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f2ceb0d68a
Add -B option docs. Add .VARIABLES variable. Add a few new tests. Add a new translation: Swedish
183 lines
7.8 KiB
C
183 lines
7.8 KiB
C
/* Definitions for using variables in GNU Make.
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Copyright (C) 1988, 1989, 1990, 1991, 1992, 2002 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, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "hash.h"
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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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enum variable_flavor
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{
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f_bogus, /* Bogus (error) */
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f_simple, /* Simple definition (:=) */
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f_recursive, /* Recursive definition (=) */
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f_append, /* Appending definition (+=) */
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f_conditional /* Conditional definition (?=) */
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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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#define EXP_COUNT_BITS 15 /* This gets all the bitfields into 32 bits */
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#define EXP_COUNT_MAX ((1<<EXP_COUNT_BITS)-1)
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struct variable
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{
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char *name; /* Variable name. */
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int length; /* strlen (name) */
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char *value; /* Variable value. */
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struct floc fileinfo; /* Where the variable was defined. */
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unsigned int recursive:1; /* Gets recursively re-evaluated. */
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unsigned int per_target:1; /* Nonzero if a target-specific variable. */
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unsigned int append:1; /* Nonzero if an appending target-specific
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variable. */
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unsigned int special:1; /* Nonzero if this is a special variable. */
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unsigned int expanding:1; /* Nonzero if currently being expanded. */
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unsigned int exp_count:EXP_COUNT_BITS;
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/* If >1, allow this many self-referential
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expansions. */
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enum variable_origin
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origin ENUM_BITFIELD (3); /* Variable origin. */
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unsigned int exportable:1; /* Nonzero if the variable _could_ be
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exported. */
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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 hash_table table; /* Hash table of variables. */
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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_for_file PARAMS ((struct variable *v,
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struct file *file));
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#define recursively_expand(v) recursively_expand_for_file (v, NULL)
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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, int read));
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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 *do_variable_definition PARAMS ((const struct floc *flocp, const char *name, char *value, enum variable_origin origin, enum variable_flavor flavor, int target_var));
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extern struct variable *try_variable_definition PARAMS ((const struct floc *flocp, char *line, enum variable_origin origin, int target_var));
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extern void init_hash_global_variable_set PARAMS ((void));
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extern void hash_init_function_table PARAMS ((void));
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extern struct variable *lookup_variable PARAMS ((const char *name, unsigned int length));
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extern struct variable *lookup_variable_in_set PARAMS ((const char *name,
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unsigned int length,
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const struct variable_set *set));
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extern struct variable *define_variable_in_set
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PARAMS ((const char *name, unsigned int length, char *value,
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enum variable_origin origin, int recursive,
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struct variable_set *set, const struct floc *flocp));
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/* Define a variable in the current variable set. */
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#define define_variable(n,l,v,o,r) \
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define_variable_in_set((n),(l),(v),(o),(r),\
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current_variable_set_list->set,NILF)
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/* Define a variable with a location in the current variable set. */
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#define define_variable_loc(n,l,v,o,r,f) \
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define_variable_in_set((n),(l),(v),(o),(r),\
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current_variable_set_list->set,(f))
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/* Define a variable with a location in the global variable set. */
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#define define_variable_global(n,l,v,o,r,f) \
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define_variable_in_set((n),(l),(v),(o),(r),NULL,(f))
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/* Define a variable in FILE's variable set. */
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#define define_variable_for_file(n,l,v,o,r,f) \
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define_variable_in_set((n),(l),(v),(o),(r),(f)->variables->set,NILF)
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/* Warn that NAME is an undefined variable. */
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#define warn_undefined(n,l) do{\
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if (warn_undefined_variables_flag) \
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error (reading_file, \
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_("warning: undefined variable `%.*s'"), \
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(int)(l), (n)); \
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}while(0)
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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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#define MAKELEVEL_NAME "MAKELEVEL"
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#define MAKELEVEL_LENGTH (sizeof (MAKELEVEL_NAME) - 1)
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