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91f796fa72
for getting the list of variable names and for clearing all rule and variable storage. * compile.c - better error reporting for unknown rules; now it is a hard error. * hash.c/h - added hash_free to allow removal of elements from a hash * rule.c/h - implemented rule freeing; stopped exporting rules to the global module by default. * variable.c - reclaim variable storage when disposing of variable hash. * build.jam - make grammar building work under NT [SVN r18405]
112 lines
2.3 KiB
C
112 lines
2.3 KiB
C
/* (C) Copyright David Abrahams 2001. Permission to copy, use, modify, sell and
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* distribute this software is granted provided this copyright notice appears
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* in all copies. This software is provided "as is" without express or implied
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* warranty, and with no claim as to its suitability for any purpose.
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*/
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#include "modules.h"
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#include "jam.h"
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#include "string.h"
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#include "hash.h"
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#include "newstr.h"
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#include "lists.h"
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#include "parse.h"
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#include "rules.h"
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#include "variable.h"
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#include "strings.h"
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#include <assert.h>
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static struct hash* module_hash = 0;
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static char* new_module_str( module* m, char* suffix )
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{
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char* result;
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string s;
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string_copy( &s, m->name );
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string_append( &s, suffix );
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result = newstr( s.value );
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string_free( &s );
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return result;
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}
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module* bindmodule( char* name )
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{
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string s;
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module m_, *m = &m_;
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if( !module_hash )
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module_hash = hashinit( sizeof( module ), "modules" );
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string_new( &s );
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if (name)
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{
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string_append( &s, name );
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string_push_back( &s, '.' );
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}
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m->name = s.value;
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if ( hashenter( module_hash, (HASHDATA **)&m ) )
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{
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m->name = newstr( m->name );
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m->variables = 0;
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m->rules = 0;
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}
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string_free( &s );
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return m;
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}
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/*
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* demand_rules() - Get the module's "rules" hash on demand
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*/
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struct hash* demand_rules( module* m )
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{
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if ( !m->rules )
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m->rules = hashinit( sizeof( RULE ), new_module_str( m, "rules" ) );
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return m->rules;
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}
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/*
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* delete_module() - wipe out the module's rules and variables
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*/
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static void delete_rule_( void* xrule, void* data )
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{
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rule_free( (RULE*)xrule );
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}
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void delete_module( module* m )
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{
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/* clear out all the rules */
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if ( m->rules )
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{
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hashenumerate( m->rules, delete_rule_, (void*)0 );
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hashdone( m->rules );
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m->rules = 0;
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}
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if ( m->variables )
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{
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var_hash_swap( &m->variables );
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var_done();
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var_hash_swap( &m->variables );
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m->variables = 0;
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}
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}
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module* root_module()
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{
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static module* root = 0;
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if ( !root )
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root = bindmodule(0);
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return root;
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}
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void enter_module( module* m )
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{
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var_hash_swap( &m->variables );
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}
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void exit_module( module* m )
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{
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var_hash_swap( &m->variables );
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}
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