mirror of
https://github.com/fish-shell/fish-shell
synced 2024-12-27 21:33:09 +00:00
129 lines
2.1 KiB
C++
129 lines
2.1 KiB
C++
/** \file intern.c
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Library for pooling common strings
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <wchar.h>
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#include <unistd.h>
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#include "fallback.h"
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#include "util.h"
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#include "wutil.h"
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#include "common.h"
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#include "intern.h"
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/**
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Table of interned strings
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*/
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static hash_table_t *intern_table=0;
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/**
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Table of static interned strings
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*/
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static hash_table_t *intern_static_table=0;
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const wchar_t *intern( const wchar_t *in )
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{
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ASSERT_IS_MAIN_THREAD();
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const wchar_t *res=0;
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// debug( 0, L"intern %ls", in );
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if( !in )
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return 0;
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if( !intern_table )
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{
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intern_table = (hash_table_t *)malloc( sizeof( hash_table_t ) );
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if( !intern_table )
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{
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DIE_MEM();
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}
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hash_init( intern_table, &hash_wcs_func, &hash_wcs_cmp );
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}
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if( intern_static_table )
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{
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res = (const wchar_t *)hash_get( intern_static_table, in );
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}
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if( !res )
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{
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res = (const wchar_t *)hash_get( intern_table, in );
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if( !res )
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{
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res = wcsdup( in );
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if( !res )
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{
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DIE_MEM();
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}
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hash_put( intern_table, res, res );
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}
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}
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return res;
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}
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const wchar_t *intern_static( const wchar_t *in )
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{
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const wchar_t *res=0;
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if( !in )
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return 0;
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if( !intern_static_table )
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{
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intern_static_table = (hash_table_t *)malloc( sizeof( hash_table_t ) );
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if( !intern_static_table )
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{
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DIE_MEM();
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}
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hash_init( intern_static_table, &hash_wcs_func, &hash_wcs_cmp );
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}
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res = (const wchar_t *)hash_get( intern_static_table, in );
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if( !res )
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{
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res = in;
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hash_put( intern_static_table, res, res );
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}
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return res;
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}
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/**
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Free the specified key/value pair. Should only be called by intern_free_all at shutdown
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*/
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static void clear_value( void *key, void *data )
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{
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debug( 3, L"interned string: '%ls'", data );
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free( (void *)data );
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}
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void intern_free_all()
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{
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if( intern_table )
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{
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hash_foreach( intern_table, &clear_value );
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hash_destroy( intern_table );
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free( intern_table );
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intern_table=0;
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}
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if( intern_static_table )
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{
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hash_destroy( intern_static_table );
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free( intern_static_table );
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intern_static_table=0;
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}
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}
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