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https://github.com/fish-shell/fish-shell
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Optimizations of how variable expansion implementation
darcs-hash:20060212112930-ac50b-9b8bb640ef1a5bd14230ecd276167a80d6d986c9.gz
This commit is contained in:
axel
parent
8fdb4d2a17
commit
eeaa241be8
1 changed files with 94 additions and 76 deletions
170
expand.c
170
expand.c
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@ -1,7 +1,7 @@
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/**\file expand.c
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String expansion functions. These functions perform several kinds of
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parameter expansion.
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parameter expansion.
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*/
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@ -156,6 +156,9 @@ static wchar_t *expand_var( wchar_t *in )
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return env_get( in );
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}
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static string_buffer_t *var_tmp = 0;
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static array_list_t *var_idx_list;
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void expand_variable_array( const wchar_t *val, array_list_t *out )
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{
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if( val )
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@ -390,8 +393,6 @@ static int find_process( const wchar_t *proc,
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This is a numeric job string, like '%2'
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*/
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// fwprintf( stderr, L"Numeric\n\n\n" );
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if( flags & ACCEPT_INCOMPLETE )
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{
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for( j=first_job; j != 0; j=j->next )
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@ -401,7 +402,6 @@ static int find_process( const wchar_t *proc,
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continue;
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swprintf( jid, 16, L"%d", j->job_id );
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// fwprintf( stderr, L"Jid %ls\n", jid );
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if( wcsncmp( proc, jid, wcslen(proc ) )==0 )
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{
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@ -714,6 +714,30 @@ static int expand_pid( wchar_t *in,
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return 1;
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}
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static void var_tmp_init()
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{
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if( !var_tmp )
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{
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var_tmp = sb_halloc( global_context );
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if( !var_tmp )
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die_mem();
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}
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else
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{
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sb_clear(var_tmp );
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}
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if( !var_idx_list )
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{
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var_idx_list = al_halloc( global_context );
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if( !var_idx_list )
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die_mem();
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}
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else
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{
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al_truncate( var_idx_list, 0 );
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}
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}
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/**
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Expand all environment variables in the string *ptr.
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@ -729,7 +753,7 @@ static int expand_pid( wchar_t *in,
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happens, don't edit it unless you know exactly what you are doing,
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and do proper testing afterwards.
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*/
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static int expand_variables( wchar_t *in, array_list_t *out )
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static int expand_variables( wchar_t *in, array_list_t *out, int last_idx )
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{
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wchar_t c;
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wchar_t prev_char=0;
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@ -737,7 +761,7 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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int is_ok= 1;
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int empty=0;
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for( i=wcslen(in)-1; (i>=0) && is_ok && !empty; i-- )
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for( i=last_idx; (i>=0) && is_ok && !empty; i-- )
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{
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c = in[i];
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if( ( c == VARIABLE_EXPAND ) || (c == VARIABLE_EXPAND_SINGLE ) )
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@ -745,12 +769,11 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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int start_pos = i+1;
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int stop_pos;
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int var_len, new_len;
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wchar_t *var_name;
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wchar_t * var_val;
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wchar_t * new_in;
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array_list_t l;
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int is_single = (c==VARIABLE_EXPAND_SINGLE);
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int var_name_stop_pos;
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stop_pos = start_pos;
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while( 1 )
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@ -763,7 +786,8 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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stop_pos++;
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}
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var_name_stop_pos = stop_pos;
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/* printf( "Stop for '%c'\n", in[stop_pos]);*/
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var_len = stop_pos - start_pos;
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@ -812,23 +836,18 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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break;
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}
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var_tmp_init();
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sb_append_substring( var_tmp, &in[start_pos], var_len );
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if( !(var_name = malloc( sizeof(wchar_t)*(var_len+1) )))
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{
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die_mem();
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}
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wcsncpy( var_name, &in[start_pos], var_len );
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var_name[var_len]='\0';
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/* printf( "Variable name is %s, len is %d\n", var_name, var_len );*/
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wchar_t *var_val_orig = expand_var( var_name );
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var_val = expand_var( (wchar_t *)var_tmp->buff );
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if( var_val_orig && (var_val = wcsdup( var_val_orig) ) )
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if( var_val )
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{
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int all_vars=1;
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array_list_t idx;
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al_init( &idx );
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al_init( &l );
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array_list_t var_item_list;
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al_init( &var_item_list );
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if( in[stop_pos] == L'[' )
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{
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wchar_t *end;
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@ -861,43 +880,42 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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is_ok = 0;
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break;
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}
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al_push( &idx, (void *)tmp );
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al_push( var_idx_list, (void *)tmp );
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stop_pos = end-in;
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}
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}
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if( is_ok )
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{
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expand_variable_array( var_val, &l );
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expand_variable_array( var_val, &var_item_list );
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if( !all_vars )
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{
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int j;
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for( j=0; j<al_get_count( &idx ); j++)
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for( j=0; j<al_get_count( var_idx_list ); j++)
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{
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int tmp = (int)al_get( &idx, j );
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if( tmp < 1 || tmp > al_get_count( &l ) )
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int tmp = (int)al_get( var_idx_list, j );
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if( tmp < 1 || tmp > al_get_count( &var_item_list ) )
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{
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error( SYNTAX_ERROR,
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-1,
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L"Array index out of bounds" );
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is_ok=0;
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al_truncate( &idx, j );
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al_truncate( var_idx_list, j );
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break;
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}
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else
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{
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/* Move string from list l to list idx */
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al_set( &idx, j, al_get( &l, tmp-1 ) );
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al_set( &l, tmp-1, 0 );
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al_set( var_idx_list, j, al_get( &var_item_list, tmp-1 ) );
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al_set( &var_item_list, tmp-1, 0 );
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}
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}
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/* Free remaining strings in list l and truncate it */
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al_foreach( &l, (void (*)(const void *))&free );
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al_truncate( &l, 0 );
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al_foreach( &var_item_list, (void (*)(const void *))&free );
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al_truncate( &var_item_list, 0 );
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/* Add items from list idx back to list l */
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al_push_all( &l, &idx );
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al_push_all( &var_item_list, var_idx_list );
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}
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free( var_val );
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}
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if( is_ok )
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@ -906,16 +924,15 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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if( is_single )
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{
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string_buffer_t res;
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sb_init( &res );
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in[i]=0;
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sb_init( &res );
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sb_append( &res, in );
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sb_append_char( &res, INTERNAL_SEPARATOR );
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for( j=0; j<al_get_count( &l); j++ )
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for( j=0; j<al_get_count( &var_item_list); j++ )
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{
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wchar_t *next = (wchar_t *)al_get( &l, j );
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wchar_t *next = (wchar_t *)al_get( &var_item_list, j );
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if( is_ok )
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{
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@ -926,52 +943,58 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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free( next );
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}
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sb_append( &res, &in[stop_pos] );
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is_ok &= expand_variables( (wchar_t *)res.buff, out );
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is_ok &= expand_variables( (wchar_t *)res.buff, out, i );
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}
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else
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{
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for( j=0; j<al_get_count( &l); j++ )
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for( j=0; j<al_get_count( &var_item_list); j++ )
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{
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wchar_t *next = (wchar_t *)al_get( &l, j );
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if( is_ok )
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wchar_t *next = (wchar_t *)al_get( &var_item_list, j );
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if( is_ok && (i == 0) && (!in[stop_pos]) )
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{
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new_len = wcslen(in) - (stop_pos-start_pos+1) + wcslen( next) +2;
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if( !(new_in = malloc( sizeof(wchar_t)*new_len )))
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al_push( out, next );
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}
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else
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{
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if( is_ok )
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{
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die_mem();
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}
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else
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{
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wcsncpy( new_in, in, start_pos-1 );
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if(start_pos>1 && new_in[start_pos-2]!=VARIABLE_EXPAND)
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new_len = wcslen(in) - (stop_pos-start_pos+1);
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new_len += wcslen( next) +2;
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if( !(new_in = malloc( sizeof(wchar_t)*new_len )))
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{
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new_in[start_pos-1]=INTERNAL_SEPARATOR;
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new_in[start_pos]=L'\0';
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die_mem();
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}
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else
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new_in[start_pos-1]=L'\0';
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wcscat( new_in, next );
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wcscat( new_in, &in[stop_pos] );
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{
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wcsncpy( new_in, in, start_pos-1 );
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if(start_pos>1 && new_in[start_pos-2]!=VARIABLE_EXPAND)
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{
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new_in[start_pos-1]=INTERNAL_SEPARATOR;
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new_in[start_pos]=L'\0';
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}
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else
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new_in[start_pos-1]=L'\0';
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wcscat( new_in, next );
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wcscat( new_in, &in[stop_pos] );
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// fwprintf( stderr, L"New value %ls\n", new_in );
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is_ok &= expand_variables( new_in, out );
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is_ok &= expand_variables( new_in, out, i );
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}
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}
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free( next );
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}
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free( next );
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}
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}
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}
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al_destroy( &l );
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al_destroy( &idx );
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free(in);
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free(var_name );
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al_destroy( &var_item_list );
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return is_ok;
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}
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else
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@ -997,19 +1020,14 @@ static int expand_variables( wchar_t *in, array_list_t *out )
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in[i]=0;
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sb_append( &res, in );
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sb_append( &res, &in[stop_pos] );
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is_ok &= expand_variables( wcsdup((wchar_t *)res.buff), out );
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sb_destroy( &res );
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is_ok &= expand_variables( (wchar_t *)res.buff, out, i );
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free(in);
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free(var_name );
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return is_ok;
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}
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}
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free(var_name );
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}
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@ -1375,7 +1393,7 @@ static void remove_internal_separator( const void *s, int conv )
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case INTERNAL_SEPARATOR:
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in++;
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break;
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case ANY_CHAR:
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in++;
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*out++ = conv?L'?':ANY_CHAR;
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@ -1483,7 +1501,7 @@ int expand_string( void *context,
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}
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else
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{
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if(!expand_variables( next, out ))
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if(!expand_variables( next, out, wcslen(next)-1 ))
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{
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al_destroy( in );
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al_destroy( out );
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@ -1560,6 +1578,7 @@ int expand_string( void *context,
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int wc_res;
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remove_internal_separator( next, EXPAND_SKIP_WILDCARDS & flags );
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if( ((flags & ACCEPT_INCOMPLETE) && (!(flags & EXPAND_SKIP_WILDCARDS))) ||
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wildcard_has( next, 1 ) )
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{
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@ -1589,7 +1608,6 @@ int expand_string( void *context,
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al_push_all( end_out, out );
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al_truncate( out, 0 );
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break;
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}
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}
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else
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