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Substantial modifications of expand_variables to modernize, normalize memory management, adopt C++ types

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This commit is contained in:
ridiculousfish 2012-01-30 21:33:15 -08:00
parent 13f72decf4
commit af2d348543
2 changed files with 270 additions and 320 deletions
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3
common.cpp
View file

@ -1820,10 +1820,11 @@ void tokenize_variable_array2( const wcstring &val, std::vector<wcstring> &out)
size_t pos = 0, end = val.size();
while (pos < end) {
size_t next_pos = val.find(ARRAY_SEP, pos);
if (next_pos == wcstring::npos) next_pos = end;
if (next_pos == wcstring::npos) break;
out.push_back(val.substr(pos, next_pos - pos));
pos = next_pos + 1; //skip the separator
}
out.push_back(val.substr(pos, end - pos));
}
void tokenize_variable_array( const wchar_t *val, array_list_t *out )

587
expand.cpp
View file

@ -176,7 +176,7 @@ int expand_is_clean( const wchar_t *in )
/**
Return the environment variable value for the string starting at \c in.
*/
static const wchar_t* expand_var( wchar_t *in )
static const wchar_t* expand_var(const wchar_t *in)
{
if( !in )
return 0;
@ -1199,73 +1199,56 @@ static int expand_variables( parser_t &parser, wchar_t *in, array_list_t *out, i
return is_ok;
}
static int expand_variables2( parser_t &parser, wchar_t * in, std::vector<completion_t> &out, int last_idx )
static int expand_variables_internal( parser_t &parser, wchar_t * const in, std::vector<completion_t> &out, int last_idx );
static int expand_variables2( parser_t &parser, const wcstring &instr, std::vector<completion_t> &out, int last_idx ) {
wchar_t *in = wcsdup(instr.c_str());
int result = expand_variables_internal(parser, in, out, last_idx);
free(in);
return result;
}
static int expand_variables_internal( parser_t &parser, wchar_t * const in, std::vector<completion_t> &out, int last_idx )
{
wchar_t c;
wchar_t prev_char=0;
int i, j;
int is_ok= 1;
int empty=0;
static string_buffer_t *var_tmp = 0;
static array_list_t *var_idx_list = 0;
CHECK( in, 0 );
// CHECK( out, 0 );
wcstring var_tmp;
std::vector<long> var_idx_list;
// CHECK( out, 0 );
if( !var_tmp )
for( int i=last_idx; (i>=0) && is_ok && !empty; i-- )
{
var_tmp = sb_halloc( global_context );
if( !var_tmp )
DIE_MEM();
}
else
{
sb_clear(var_tmp );
}
if( !var_idx_list )
{
var_idx_list = al_halloc( global_context );
if( !var_idx_list )
DIE_MEM();
}
else
{
al_truncate( var_idx_list, 0 );
}
for( i=last_idx; (i>=0) && is_ok && !empty; i-- )
{
c = in[i];
const wchar_t c = in[i];
if( ( c == VARIABLE_EXPAND ) || (c == VARIABLE_EXPAND_SINGLE ) )
{
int start_pos = i+1;
int stop_pos;
int var_len, new_len;
int var_len;
const wchar_t * var_val;
wchar_t * new_in;
int is_single = (c==VARIABLE_EXPAND_SINGLE);
int var_name_stop_pos;
stop_pos = start_pos;
while( 1 )
{
if( !(in[stop_pos ]) )
break;
if( !( iswalnum( in[stop_pos] ) ||
(wcschr(L"_", in[stop_pos])!= 0) ) )
(wcschr(L"_", in[stop_pos])!= 0) ) )
break;
stop_pos++;
}
var_name_stop_pos = stop_pos;
/* printf( "Stop for '%c'\n", in[stop_pos]);*/
/* printf( "Stop for '%c'\n", in[stop_pos]);*/
var_len = stop_pos - start_pos;
if( var_len == 0 )
{
expand_variable_error( parser, in, stop_pos-1, -1 );
@ -1273,105 +1256,100 @@ static int expand_variables2( parser_t &parser, wchar_t * in, std::vector<comple
is_ok = 0;
break;
}
sb_append_substring( var_tmp, &in[start_pos], var_len );
var_val = expand_var( (wchar_t *)var_tmp->buff );
var_tmp.append(in + start_pos, var_len);
var_val = expand_var(var_tmp.c_str() );
if( var_val )
{
int all_vars=1;
array_list_t var_item_list;
al_init( &var_item_list );
wcstring_list_t var_item_list;
if( in[stop_pos] == L'[' )
{
wchar_t *slice_end;
all_vars=0;
if( parse_slice( &in[stop_pos], &slice_end, var_idx_list ) )
if( parse_slice2( in + stop_pos, &slice_end, var_idx_list ) )
{
parser.error( SYNTAX_ERROR,
-1,
L"Invalid index value" );
-1,
L"Invalid index value" );
is_ok = 0;
}
stop_pos = (slice_end-in);
}
if( is_ok )
{
tokenize_variable_array( var_val, &var_item_list );
tokenize_variable_array2( var_val, var_item_list );
if( !all_vars )
{
int j;
for( j=0; j<al_get_count( var_idx_list ); j++)
wcstring_list_t string_values(var_idx_list.size());
for( size_t j=0; j<var_idx_list.size(); j++)
{
long tmp = al_get_long( var_idx_list, j );
long tmp = var_idx_list.at(j);
if( tmp < 0 )
{
tmp = al_get_count( &var_item_list)+tmp+1;
tmp = ((long)var_item_list.size())+tmp+1;
}
/*
Check that we are within array
bounds. If not, truncate the list to
exit.
*/
if( tmp < 1 || tmp > al_get_count( &var_item_list ) )
Check that we are within array
bounds. If not, truncate the list to
exit.
*/
if( tmp < 1 || (size_t)tmp > var_item_list.size() )
{
parser.error( SYNTAX_ERROR,
-1,
ARRAY_BOUNDS_ERR );
-1,
ARRAY_BOUNDS_ERR );
is_ok=0;
al_truncate( var_idx_list, j );
var_idx_list.resize(j);
break;
}
else
{
/* Replace each index in var_idx_list inplace with the string value at the specified index */
al_set( var_idx_list, j, wcsdup((const wchar_t *)al_get( &var_item_list, tmp-1 ) ) );
//al_set( var_idx_list, j, wcsdup((const wchar_t *)al_get( &var_item_list, tmp-1 ) ) );
string_values.at(j) = var_item_list.at(tmp-1);
}
}
/* Free strings in list var_item_list and truncate it */
al_foreach( &var_item_list, &free );
al_truncate( &var_item_list, 0 );
/* Add items from list idx back to list l */
al_push_all( &var_item_list, var_idx_list );
// string_values is the new var_item_list
var_item_list.swap(string_values);
}
}
if( is_ok )
{
if( is_single )
{
string_buffer_t res;
in[i]=0;
sb_init( &res );
sb_append( &res, in );
sb_append_char( &res, INTERNAL_SEPARATOR );
for( j=0; j<al_get_count( &var_item_list); j++ )
in[i]=0;
wcstring res = in;
res.push_back(INTERNAL_SEPARATOR);
for( size_t j=0; j<var_item_list.size(); j++ )
{
wchar_t *next = (wchar_t *)al_get( &var_item_list, j );
const wcstring &next = var_item_list.at(j);
if( is_ok )
{
if( j != 0 )
sb_append( &res, L" " );
sb_append( &res, next );
res.append(L" ");
res.append(next);
}
free( next );
}
sb_append( &res, &in[stop_pos] );
is_ok &= expand_variables2( parser, (wchar_t *)res.buff, out, i );
res.append(in + stop_pos);
is_ok &= expand_variables2( parser, res, out, i );
}
else
{
for( j=0; j<al_get_count( &var_item_list); j++ )
for( size_t j=0; j<var_item_list.size(); j++ )
{
wchar_t *next = (wchar_t *)al_get( &var_item_list, j );
const wcstring &next = var_item_list.at(j);
if( is_ok && (i == 0) && (!in[stop_pos]) )
{
completion_t data_to_push;
@ -1383,91 +1361,68 @@ static int expand_variables2( parser_t &parser, wchar_t * in, std::vector<comple
if( is_ok )
{
new_len = wcslen(in) - (stop_pos-start_pos+1);
new_len += wcslen( next) +2;
if( !(new_in = (wchar_t *)malloc( sizeof(wchar_t)*new_len )))
{
DIE_MEM();
}
else
{
wcslcpy( new_in, in, start_pos );
if(start_pos>1 && new_in[start_pos-2]!=VARIABLE_EXPAND)
{
new_in[start_pos-1]=INTERNAL_SEPARATOR;
new_in[start_pos]=L'\0';
}
else
new_in[start_pos-1]=L'\0';
wcscat( new_in, next );
wcscat( new_in, &in[stop_pos] );
is_ok &= expand_variables2( parser, new_in, out, i );
}
wcstring new_in;
if (start_pos > 0)
new_in.append(in, start_pos - 1);
// at this point new_in.size() is start_pos - 1
if(start_pos>1 && new_in[start_pos-2]!=VARIABLE_EXPAND)
{
new_in.push_back(INTERNAL_SEPARATOR);
}
new_in.append(next);
new_in.append(in + stop_pos);
is_ok &= expand_variables2( parser, new_in, out, i );
}
free( next );
}
}
}
}
free(in);
al_destroy( &var_item_list );
return is_ok;
}
else
{
/*
Expand a non-existing variable
*/
Expand a non-existing variable
*/
if( c == VARIABLE_EXPAND )
{
/*
Regular expansion, i.e. expand this argument to nothing
*/
Regular expansion, i.e. expand this argument to nothing
*/
empty = 1;
}
else
{
/*
Expansion to single argument.
*/
string_buffer_t res;
sb_init( &res );
in[i]=0;
sb_append( &res, in );
sb_append( &res, &in[stop_pos] );
is_ok &= expand_variables2( parser, (wchar_t *)res.buff, out, i );
free(in);
Expansion to single argument.
*/
wcstring res;
in[i] = 0;
res.append(in);
res.append(in + stop_pos);
is_ok &= expand_variables2( parser, res, out, i );
return is_ok;
}
}
}
prev_char = c;
}
if( !empty )
{
completion_t data_to_push;
data_to_push.completion = in;
out.push_back( data_to_push );
}
else
{
free( in );
}
return is_ok;
}
@ -2059,7 +2014,6 @@ int expand_string2( const wcstring &input, std::vector<completion_t> &output, in
std::vector<completion_t> *in, *out;
size_t i;
int cmdsubst_ok = 1;
int res = EXPAND_OK;
if( (!(flags & ACCEPT_INCOMPLETE)) && expand_is_clean( input.c_str() ) )
@ -2069,7 +2023,7 @@ int expand_string2( const wcstring &input, std::vector<completion_t> &output, in
output.push_back(data_to_push);
return EXPAND_OK;
}
if( EXPAND_SKIP_CMDSUBST & flags )
{
wchar_t *begin, *end;
@ -2088,192 +2042,187 @@ int expand_string2( const wcstring &input, std::vector<completion_t> &output, in
}
else
{
cmdsubst_ok = expand_cmdsubst2(parser, input, list1);
int cmdsubst_ok = expand_cmdsubst2(parser, input, list1);
if (! cmdsubst_ok)
return EXPAND_ERROR;
}
if( !cmdsubst_ok )
{
return EXPAND_ERROR;
}
else
{
in = &list1;
out = &list2;
for( i=0; i < in->size(); i++ )
{
/*
We accept incomplete strings here, since complete uses
expand_string to expand incomplete strings from the
commandline.
*/
int unescape_flags = UNESCAPE_SPECIAL | UNESCAPE_INCOMPLETE;
wcstring next = expand_unescape_string( in->at(i).completion, unescape_flags );
if( EXPAND_SKIP_VARIABLES & flags )
{
for (size_t i=0; i < next.size(); i++) {
if (next.at(i) == VARIABLE_EXPAND) {
next[i] = L'$';
}
in = &list1;
out = &list2;
for( i=0; i < in->size(); i++ )
{
/*
We accept incomplete strings here, since complete uses
expand_string to expand incomplete strings from the
commandline.
*/
int unescape_flags = UNESCAPE_SPECIAL | UNESCAPE_INCOMPLETE;
wcstring next = expand_unescape_string( in->at(i).completion, unescape_flags );
if( EXPAND_SKIP_VARIABLES & flags )
{
for (size_t i=0; i < next.size(); i++) {
if (next.at(i) == VARIABLE_EXPAND) {
next[i] = L'$';
}
completion_t data_to_push;
data_to_push.completion = next;
out->push_back(data_to_push);
}
else
{
if(!expand_variables2( parser, wcsdup(next.c_str()), *out, next.size() - 1 ))
{
return EXPAND_ERROR;
}
}
}
}
completion_t data_to_push;
data_to_push.completion = next;
out->push_back(data_to_push);
}
else
{
if(!expand_variables2( parser, next, *out, next.size() - 1 ))
{
return EXPAND_ERROR;
}
}
}
in->clear();
in = &list2;
out = &list1;
for( i=0; i < in->size(); i++ )
{
wcstring next = in->at(i).completion;
in->clear();
if( !expand_brackets( parser, wcsdup(next.c_str()), flags, *out ))
{
return EXPAND_ERROR;
}
}
in->clear();
in = &list1;
out = &list2;
for( i=0; i < in->size(); i++ )
{
wcstring next = in->at(i).completion;
in = &list2;
out = &list1;
expand_tilde_internal(next);
for( i=0; i < in->size(); i++ )
{
wcstring next = in->at(i).completion;
if( flags & ACCEPT_INCOMPLETE )
{
if( next[0] == PROCESS_EXPAND )
{
/*
If process expansion matches, we are not
interested in other completions, so we
short-circut and return
*/
expand_pid( next, flags, output );
return EXPAND_OK;
}
else
{
completion_t data_to_push;
data_to_push.completion = next;
out->push_back(data_to_push);
}
}
else
{
if( !expand_pid( next, flags, *out ) )
{
return EXPAND_ERROR;
}
}
}
in->clear();
in = &list2;
out = &list1;
for( i=0; i < in->size(); i++ )
{
wcstring next_str = in->at(i).completion;
int wc_res;
remove_internal_separator2( next_str, EXPAND_SKIP_WILDCARDS & flags );
const wchar_t *next = next_str.c_str();
if( ((flags & ACCEPT_INCOMPLETE) && (!(flags & EXPAND_SKIP_WILDCARDS))) ||
wildcard_has( next, 1 ) )
{
const wchar_t *start, *rest;
std::vector<completion_t> *list = out;
if( !expand_brackets( parser, wcsdup(next.c_str()), flags, *out ))
{
return EXPAND_ERROR;
}
}
in->clear();
in = &list1;
out = &list2;
for( i=0; i < in->size(); i++ )
{
wcstring next = in->at(i).completion;
if( next[0] == '/' )
{
start = L"/";
rest = &next[1];
}
else
{
start = L"";
rest = next;
}
expand_tilde_internal(next);
if( flags & ACCEPT_INCOMPLETE )
{
list = &output;
}
wc_res = wildcard_expand_string(rest, start, flags, *list);
if( flags & ACCEPT_INCOMPLETE )
{
if( next[0] == PROCESS_EXPAND )
{
/*
If process expansion matches, we are not
interested in other completions, so we
short-circut and return
*/
expand_pid( next, flags, output );
return EXPAND_OK;
}
else
{
completion_t data_to_push;
data_to_push.completion = next;
out->push_back(data_to_push);
}
}
else
{
if( !expand_pid( next, flags, *out ) )
{
return EXPAND_ERROR;
}
}
}
in->clear();
in = &list2;
out = &list1;
for( i=0; i < in->size(); i++ )
{
wcstring next_str = in->at(i).completion;
int wc_res;
if( !(flags & ACCEPT_INCOMPLETE) )
{
switch( wc_res )
{
case 0:
{
if( !(flags & ACCEPT_INCOMPLETE) )
{
if( res == EXPAND_OK )
res = EXPAND_WILDCARD_NO_MATCH;
break;
}
}
remove_internal_separator2( next_str, EXPAND_SKIP_WILDCARDS & flags );
const wchar_t *next = next_str.c_str();
case 1:
{
size_t j;
res = EXPAND_WILDCARD_MATCH;
sort_completions( *out );
for( j=0; j< out->size(); j++ )
{
output.push_back( out->at(j) );
}
out->clear();
break;
}
case -1:
{
return EXPAND_ERROR;
}
}
}
if( ((flags & ACCEPT_INCOMPLETE) && (!(flags & EXPAND_SKIP_WILDCARDS))) ||
wildcard_has( next, 1 ) )
{
const wchar_t *start, *rest;
std::vector<completion_t> *list = out;
if( next[0] == '/' )
{
start = L"/";
rest = &next[1];
}
else
{
start = L"";
rest = next;
}
if( flags & ACCEPT_INCOMPLETE )
{
list = &output;
}
wc_res = wildcard_expand_string(rest, start, flags, *list);
if( !(flags & ACCEPT_INCOMPLETE) )
{
switch( wc_res )
{
case 0:
{
if( !(flags & ACCEPT_INCOMPLETE) )
{
if( res == EXPAND_OK )
res = EXPAND_WILDCARD_NO_MATCH;
break;
}
}
case 1:
{
size_t j;
res = EXPAND_WILDCARD_MATCH;
sort_completions( *out );
for( j=0; j< out->size(); j++ )
{
output.push_back( out->at(j) );
}
out->clear();
break;
}
case -1:
{
return EXPAND_ERROR;
}
}
}
}
else
{
if( flags & ACCEPT_INCOMPLETE)
{
}
else
{
completion_t data_to_push;
data_to_push.completion = next;
output.push_back(data_to_push);
}
}
}
}
}
else
{
if( flags & ACCEPT_INCOMPLETE)
{
}
else
{
completion_t data_to_push;
data_to_push.completion = next;
output.push_back(data_to_push);
}
}
}
return res;
}