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4coder
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4coder/4coder_helper.cpp

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/*
* Miscellaneous helpers for common operations.
*/
// TOP
inline Binding_Unit*
write_unit(Bind_Helper *helper, Binding_Unit unit){
Binding_Unit *p = 0;
helper->write_total += sizeof(*p);
if (helper->error == 0 && helper->cursor != helper->end){
p = helper->cursor++;
*p = unit;
}
return p;
}
inline Bind_Helper
begin_bind_helper(void *data, int32_t size){
Bind_Helper result = {0};
result.cursor = (Binding_Unit*)data;
result.start = result.cursor;
result.end = result.start + size / sizeof(*result.cursor);
Binding_Unit unit = {0};
unit.type = unit_header;
unit.header.total_size = sizeof(*result.header);
result.header = write_unit(&result, unit);
result.header->header.user_map_count = 0;
return(result);
}
inline void
begin_map(Bind_Helper *helper, int32_t mapid, bool32 replace){
if (helper->group != 0 && helper->error == 0) helper->error = BH_ERR_MISSING_END;
if (!helper->error && mapid < mapid_global) ++helper->header->header.user_map_count;
Binding_Unit unit;
unit.type = unit_map_begin;
unit.map_begin.mapid = mapid;
unit.map_begin.replace = replace;
helper->group = write_unit(helper, unit);
helper->group->map_begin.bind_count = 0;
}
inline void
begin_map(Bind_Helper *helper, int32_t mapid){
begin_map(helper, mapid, false);
}
inline void
restart_map(Bind_Helper *helper, int32_t mapid){
begin_map(helper, mapid, true);
}
inline void
end_map(Bind_Helper *helper){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
helper->group = 0;
}
inline void
bind(Bind_Helper *helper, Key_Code code, uint8_t modifiers, Command_ID cmdid){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
if (!helper->error) ++helper->group->map_begin.bind_count;
Binding_Unit unit;
unit.type = unit_binding;
unit.binding.command_id = cmdid;
unit.binding.code = code;
unit.binding.modifiers = modifiers;
write_unit(helper, unit);
}
inline void
bind(Bind_Helper *helper, Key_Code code, uint8_t modifiers, Custom_Command_Function *func){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
if (!helper->error) ++helper->group->map_begin.bind_count;
Binding_Unit unit;
unit.type = unit_callback;
unit.callback.func = func;
unit.callback.code = code;
unit.callback.modifiers = modifiers;
write_unit(helper, unit);
}
inline void
bind(Bind_Helper *helper, Key_Code code, uint8_t modifiers, Generic_Command cmd){
if (cmd.cmdid < cmdid_count){
bind(helper, code, modifiers, cmd.cmdid);
}
else{
bind(helper, code, modifiers, cmd.command);
}
}
inline void
bind_vanilla_keys(Bind_Helper *helper, int32_t cmdid){
bind(helper, 0, 0, cmdid);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, Custom_Command_Function *func){
bind(helper, 0, 0, func);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, unsigned char modifiers, int32_t cmdid){
bind(helper, 0, modifiers, cmdid);
}
inline void
bind_vanilla_keys(Bind_Helper *helper, unsigned char modifiers, Custom_Command_Function *func){
bind(helper, 0, modifiers, func);
}
inline void
inherit_map(Bind_Helper *helper, int32_t mapid){
if (helper->group == 0 && helper->error == 0) helper->error = BH_ERR_MISSING_BEGIN;
if (!helper->error && mapid < mapid_global) ++helper->header->header.user_map_count;
Binding_Unit unit = {0};
unit.type = unit_inherit;
unit.map_inherit.mapid = mapid;
write_unit(helper, unit);
}
inline void
set_hook(Bind_Helper *helper, int32_t hook_id, Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = hook_id;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_scroll_rule(Bind_Helper *helper, Scroll_Rule_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_scroll_rule;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_buffer_name_resolver(Bind_Helper *helper, Buffer_Name_Resolver_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_buffer_name_resolver;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_new_file_hook(Bind_Helper *helper, Open_File_Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_new_file;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_start_hook(Bind_Helper *helper, Start_Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_start;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_open_file_hook(Bind_Helper *helper, Open_File_Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_open_file;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_save_file_hook(Bind_Helper *helper, Open_File_Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_save_file;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_end_file_hook(Bind_Helper *helper, Open_File_Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_end_file;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_command_caller(Bind_Helper *helper, Command_Caller_Hook_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_command_caller;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline void
set_input_filter(Bind_Helper *helper, Input_Filter_Function *func){
Binding_Unit unit = {0};
unit.type = unit_hook;
unit.hook.hook_id = special_hook_input_filter;
unit.hook.func = (void*)func;
write_unit(helper, unit);
}
inline int32_t
end_bind_helper(Bind_Helper *helper){
if (helper->header){
helper->header->header.total_size = (int32_t)(helper->cursor - helper->start);
helper->header->header.error = helper->error;
}
int32_t result = helper->write_total;
return(result);
}
inline Bind_Buffer
end_bind_helper_get_buffer(Bind_Helper *helper){
int32_t size = end_bind_helper(helper);
Bind_Buffer result = {0};
result.data = helper->start;
result.size = size;
return(result);
}
static u32_4tech
get_key_code(char *buffer){
u32_4tech ignore;
u32_4tech result = utf8_to_u32_length_unchecked((u8_4tech*)buffer, &ignore);
return(result);
}
////////////////////////////////
static int32_t
round_down(int32_t x, int32_t b){
int32_t r = 0;
if (x >= 0){
r = x - (x % b);
}
return(r);
}
static int32_t
round_up(int32_t x, int32_t b){
int32_t r = 0;
if (x >= 0){
r = x + b - (x % b);
}
return(r);
}
static void
exec_command(Application_Links *app, Custom_Command_Function *func){
func(app);
}
static void
exec_command(Application_Links *app, Generic_Command cmd){
if (cmd.cmdid < cmdid_count){
exec_command(app, cmd.cmdid);
}
else{
exec_command(app, cmd.command);
}
}
static int32_t
key_is_unmodified(Key_Event_Data *key){
int8_t *mods = key->modifiers;
int32_t unmodified = (!mods[MDFR_CONTROL_INDEX] && !mods[MDFR_ALT_INDEX]);
return(unmodified);
}
static uint32_t
to_writable_character(User_Input in, uint8_t *character){
uint32_t result = 0;
if (in.type == UserInputKey){
if (in.key.character != 0){
u32_to_utf8_unchecked(in.key.character, character, &result);
}
}
return(result);
}
static uint32_t
to_writable_character(Key_Event_Data key, uint8_t *character){
uint32_t result = 0;
if (key.character != 0){
u32_to_utf8_unchecked(key.character, character, &result);
}
return(result);
}
static bool32
backspace_utf8(String *str){
bool32 result = false;
uint8_t *s = (uint8_t*)str->str;
if (str->size > 0){
uint32_t i = str->size-1;
for (; i > 0; --i){
if (s[i] <= 0x7F || s[i] >= 0xC0){
break;
}
}
str->size = i;
result = true;
}
return(result);
}
static bool32
query_user_general(Application_Links *app, Query_Bar *bar, bool32 force_number){
bool32 success = true;
// NOTE(allen|a3.4.4): It will not cause an *error* if we continue on after failing to.
// start a query bar, but it will be unusual behavior from the point of view of the
// user, if this command starts intercepting input even though no prompt is shown.
// This will only happen if you have a lot of bars open already or if the current view
// doesn't support query bars.
if (start_query_bar(app, bar, 0) == 0) return 0;
for (;;){
// NOTE(allen|a3.4.4): This call will block until the user does one of the input
// types specified in the flags. The first set of flags are inputs you'd like to intercept
// that you don't want to abort on. The second set are inputs that you'd like to cause
// the command to abort. If an event satisfies both flags, it is treated as an abort.
User_Input in = get_user_input(app, EventOnAnyKey, EventOnEsc | EventOnButton);
// NOTE(allen|a3.4.4): The responsible thing to do on abort is to end the command
// without waiting on get_user_input again.
if (in.abort){
success = false;
break;
}
uint8_t character[4];
uint32_t length = 0;
bool32 good_character = false;
if (key_is_unmodified(&in.key)){
if (force_number){
if (in.key.character >= '0' && in.key.character <= '9'){
good_character = true;
length = to_writable_character(in, character);
}
}
else{
length = to_writable_character(in, character);
if (length != 0){
good_character = true;
}
}
}
// NOTE(allen|a3.4.4): All we have to do to update the query bar is edit our
// local Query_Bar struct! This is handy because it means our Query_Bar
// is always correct for typical use without extra work updating the bar.
if (in.type == UserInputKey){
if (in.key.keycode == '\n' || in.key.keycode == '\t'){
break;
}
else if (in.key.keycode == key_back){
backspace_utf8(&bar->string);
}
else if (good_character){
append_ss(&bar->string, make_string(character, length));
}
}
}
terminate_with_null(&bar->string);
return(success);
}
static int32_t
query_user_string(Application_Links *app, Query_Bar *bar){
int32_t success = query_user_general(app, bar, false);
return(success);
}
static int32_t
query_user_number(Application_Links *app, Query_Bar *bar){
int32_t success = query_user_general(app, bar, true);
return(success);
}
static void
init_theme_zero(Theme *theme){
for (int32_t i = 0; i < Stag_COUNT; ++i){
theme->colors[i] = 0;
}
}
static char
buffer_get_char(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
char result = ' ';
*buffer = get_buffer(app, buffer->buffer_id, AccessAll);
if (pos < buffer->size){
buffer_read_range(app, buffer, pos, pos+1, &result);
}
return(result);
}
static Buffer_Identifier
buffer_identifier(char *str, int32_t len){
Buffer_Identifier identifier;
identifier.name = str;
identifier.name_len = len;
identifier.id = 0;
return(identifier);
}
static Buffer_Identifier
buffer_identifier(Buffer_ID id){
Buffer_Identifier identifier;
identifier.name = 0;
identifier.name_len = 0;
identifier.id = id;
return(identifier);
}
static Range
make_range(int32_t p1, int32_t p2){
Range range;
if (p1 < p2){
range.min = p1;
range.max = p2;
}
else{
range.min = p2;
range.max = p1;
}
return(range);
}
static void
adjust_all_buffer_wrap_widths(Application_Links *app, int32_t wrap_width, int32_t min_base_width){
for (Buffer_Summary buffer = get_buffer_first(app, AccessAll);
buffer.exists;
get_buffer_next(app, &buffer, AccessAll)){
buffer_set_setting(app, &buffer, BufferSetting_WrapPosition, wrap_width);
buffer_set_setting(app, &buffer, BufferSetting_MinimumBaseWrapPosition, min_base_width);
}
}
static Buffer_Rect
get_rect(View_Summary *view){
Buffer_Rect rect = {0};
rect.char0 = view->mark.character;
rect.line0 = view->mark.line;
rect.char1 = view->cursor.character;
rect.line1 = view->cursor.line;
if (rect.line0 > rect.line1){
Swap(int32_t, rect.line0, rect.line1);
}
if (rect.char0 > rect.char1){
Swap(int32_t, rect.char0, rect.char1);
}
return(rect);
}
static i32_Rect
get_line_x_rect(View_Summary *view){
i32_Rect rect = {0};
if (view->unwrapped_lines){
rect.x0 = (int32_t)view->mark.unwrapped_x;
rect.x1 = (int32_t)view->cursor.unwrapped_x;
}
else{
rect.x0 = (int32_t)view->mark.wrapped_x;
rect.x1 = (int32_t)view->cursor.wrapped_x;
}
rect.y0 = view->mark.line;
rect.y1 = view->cursor.line;
if (rect.y0 > rect.y1){
Swap(int32_t, rect.y0, rect.y1);
}
if (rect.x0 > rect.x1){
Swap(int32_t, rect.x0, rect.x1);
}
return(rect);
}
static View_Summary
get_first_view_with_buffer(Application_Links *app, int32_t buffer_id){
View_Summary result = {0};
View_Summary test = {0};
if (buffer_id != 0){
uint32_t access = AccessAll;
for(test = get_view_first(app, access);
test.exists;
get_view_next(app, &test, access)){
Buffer_Summary buffer = get_buffer(app, test.buffer_id, access);
if(buffer.buffer_id == buffer_id){
result = test;
break;
}
}
}
return(result);
}
static bool32
open_file(Application_Links *app, Buffer_Summary *buffer_out, char *filename, int32_t filename_len, bool32 background, bool32 never_new){
bool32 result = false;
Buffer_Summary buffer = get_buffer_by_name(app, filename, filename_len, AccessProtected|AccessHidden);
if (buffer.exists){
if (buffer_out){
*buffer_out = buffer;
}
result = true;
}
else{
Buffer_Create_Flag flags = 0;
if (background){
flags |= BufferCreate_Background;
}
if (never_new){
flags |= BufferCreate_NeverNew;
}
buffer = create_buffer(app, filename, filename_len, flags);
if (buffer.exists){
if (buffer_out){
*buffer_out = buffer;
}
result = true;
}
}
return(result);
}
static Buffer_ID
buffer_identifier_to_id(Application_Links *app, Buffer_Identifier identifier){
Buffer_ID id = 0;
if (identifier.id != 0){
id = identifier.id;
}
else{
Buffer_Summary buffer = get_buffer_by_name(app, identifier.name, identifier.name_len, AccessAll);
id = buffer.buffer_id;
if (id == 0){
buffer = get_buffer_by_file_name(app, identifier.name, identifier.name_len, AccessAll);
id = buffer.buffer_id;
}
}
return(id);
}
static bool32
view_open_file(Application_Links *app, View_Summary *view, char *filename, int32_t filename_len, bool32 never_new){
bool32 result = false;
if (view != 0){
Buffer_Summary buffer = {0};
if (open_file(app, &buffer, filename, filename_len, false, never_new)){
view_set_buffer(app, view, buffer.buffer_id, 0);
result = true;
}
}
return(result);
}
static void
get_view_prev(Application_Links *app, View_Summary *view, uint32_t access){
if (view->exists){
View_ID original_id = view->view_id;
View_ID check_id = original_id;
View_Summary new_view = {0};
for (;;){
--check_id;
if (check_id <= 0){
check_id = 16;
}
if (check_id == original_id){
new_view = *view;
break;
}
new_view = get_view(app, check_id, access);
if (new_view.exists){
break;
}
}
*view = new_view;
}
}
static View_Summary
get_view_last(Application_Links *app, uint32_t access){
View_Summary view = {0};
view.exists = true;
get_view_prev(app, &view, access);
if (view.view_id < 1 || view.view_id > 16){
view = null_view_summary;
}
return(view);
}
static void
get_view_next_looped(Application_Links *app, View_Summary *view, uint32_t access){
get_view_next(app, view, access);
if (!view->exists){
*view = get_view_first(app, access);
}
}
static void
get_view_prev_looped(Application_Links *app, View_Summary *view, uint32_t access){
get_view_prev(app, view, access);
if (!view->exists){
*view = get_view_last(app, access);
}
}
static void
refresh_buffer(Application_Links *app, Buffer_Summary *buffer){
*buffer = get_buffer(app, buffer->buffer_id, AccessAll);
}
static void
refresh_view(Application_Links *app, View_Summary *view){
*view = get_view(app, view->view_id, AccessAll);
}
// TODO(allen): Setup buffer seeking to do character_pos and get View_Summary out of this parameter list.
static int32_t
character_pos_to_pos(Application_Links *app, View_Summary *view, Buffer_Summary *buffer, int32_t character_pos){
int32_t result = 0;
Full_Cursor cursor = {0};
if (view_compute_cursor(app, view, seek_character_pos(character_pos), &cursor)){
result = cursor.pos;
}
return(result);
}
static float
get_view_y(View_Summary *view){
float y = view->cursor.wrapped_y;
if (view->unwrapped_lines){
y = view->cursor.unwrapped_y;
}
return(y);
}
static float
get_view_x(View_Summary *view){
float x = view->cursor.wrapped_x;
if (view->unwrapped_lines){
x = view->cursor.unwrapped_x;
}
return(x);
}
static Range
get_view_range(View_Summary *view){
return(make_range(view->cursor.pos, view->mark.pos));
}
static bool32
read_line(Application_Links *app, Partition *part, Buffer_Summary *buffer, int32_t line, String *str){
Partial_Cursor begin = {0};
Partial_Cursor end = {0};
bool32 success = false;
if (buffer_compute_cursor(app, buffer, seek_line_char(line, 1), &begin)){
if (buffer_compute_cursor(app, buffer, seek_line_char(line, -1), &end)){
if (begin.line == line){
if (0 <= begin.pos && begin.pos <= end.pos && end.pos <= buffer->size){
int32_t size = (end.pos - begin.pos);
int32_t alloc_size = size + 1;
char *memory = push_array(part, char, alloc_size);
if (memory != 0){
*str = make_string(memory, 0, alloc_size);
success = true;
buffer_read_range(app, buffer, begin.pos, end.pos, str->str);
str->size = size;
terminate_with_null(str);
}
}
}
}
}
return(success);
}
static int32_t
buffer_get_line_start(Application_Links *app, Buffer_Summary *buffer, int32_t line){
int32_t result = buffer->size;
if (line <= buffer->line_count){
Partial_Cursor partial_cursor = {0};
buffer_compute_cursor(app, buffer, seek_line_char(line, 1), &partial_cursor);
result = partial_cursor.pos;
}
return(result);
}
static int32_t
buffer_get_line_end(Application_Links *app, Buffer_Summary *buffer, int32_t line){
int32_t result = buffer->size;
if (line <= buffer->line_count){
Partial_Cursor partial_cursor = {0};
buffer_compute_cursor(app, buffer, seek_line_char(line, -1), &partial_cursor);
result = partial_cursor.pos;
}
return(result);
}
static int32_t
buffer_get_line_number(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
Partial_Cursor partial_cursor = {0};
buffer_compute_cursor(app, buffer, seek_pos(pos), &partial_cursor);
return(partial_cursor.line);
}
static Cpp_Token*
get_first_token_at_line(Application_Links *app, Buffer_Summary *buffer, Cpp_Token_Array tokens, int32_t line, int32_t *line_start_out = 0){
int32_t line_start = buffer_get_line_start(app, buffer, line);
Cpp_Get_Token_Result get_token = cpp_get_token(tokens, line_start);
if (get_token.in_whitespace){
get_token.token_index += 1;
}
if (line_start_out){
*line_start_out = line_start;
}
Cpp_Token *result = 0;
if (get_token.token_index < tokens.count){
result = &tokens.tokens[get_token.token_index];
}
return(result);
}
////////////////////////////////
static bool32
init_stream_chunk(Stream_Chunk *chunk, Application_Links *app, Buffer_Summary *buffer,
int32_t pos, char *data, uint32_t size){
bool32 result = false;
refresh_buffer(app, buffer);
if (0 <= pos && pos < buffer->size && size > 0){
chunk->app = app;
chunk->buffer = buffer;
chunk->base_data = data;
chunk->data_size = size;
chunk->start = round_down(pos, size);
chunk->end = round_up(pos, size);
if (chunk->max_end > buffer->size || chunk->max_end == 0){
chunk->max_end = buffer->size;
}
if (chunk->max_end && chunk->max_end < chunk->end){
chunk->end = chunk->max_end;
}
if (chunk->min_start && chunk->min_start > chunk->start){
chunk->start = chunk->min_start;
}
if (chunk->start < chunk->end){
buffer_read_range(app, buffer, chunk->start, chunk->end, chunk->base_data);
chunk->data = chunk->base_data - chunk->start;
result = true;
}
}
return(result);
}
static bool32
forward_stream_chunk(Stream_Chunk *chunk){
Application_Links *app = chunk->app;
Buffer_Summary *buffer = chunk->buffer;
bool32 result = 0;
refresh_buffer(app, buffer);
if (chunk->end < buffer->size){
chunk->start = chunk->end;
chunk->end += chunk->data_size;
if (chunk->max_end && chunk->max_end < chunk->end){
chunk->end = chunk->max_end;
}
if (chunk->min_start && chunk->min_start > chunk->start){
chunk->start = chunk->min_start;
}
if (chunk->start < chunk->end){
buffer_read_range(app, buffer, chunk->start, chunk->end, chunk->base_data);
chunk->data = chunk->base_data - chunk->start;
result = 1;
}
}
else if (chunk->add_null && chunk->end + 1 < buffer->size){
chunk->start = buffer->size;
chunk->end = buffer->size + 1;
chunk->base_data[0] = 0;
chunk->data = chunk->base_data - chunk->start;
result = 1;
}
return(result);
}
static bool32
backward_stream_chunk(Stream_Chunk *chunk){
Application_Links *app = chunk->app;
Buffer_Summary *buffer = chunk->buffer;
bool32 result = 0;
refresh_buffer(app, buffer);
if (chunk->start > 0){
chunk->end = chunk->start;
chunk->start -= chunk->data_size;
if (chunk->max_end && chunk->max_end < chunk->end){
chunk->end = chunk->max_end;
}
if (chunk->min_start && chunk->min_start > chunk->start){
chunk->start = chunk->min_start;
}
if (chunk->start < chunk->end){
buffer_read_range(app, buffer, chunk->start, chunk->end, chunk->base_data);
chunk->data = chunk->base_data - chunk->start;
result = 1;
}
}
else if (chunk->add_null && chunk->start > -1){
chunk->start = -1;
chunk->end = 0;
chunk->base_data[0] = 0;
chunk->data = chunk->base_data - chunk->start;
result = 1;
}
return(result);
}
////////////////////////////////
static bool32
init_stream_tokens(Stream_Tokens *stream, Application_Links *app, Buffer_Summary *buffer,
int32_t pos, Cpp_Token *data, int32_t count){
bool32 result = false;
refresh_buffer(app, buffer);
int32_t token_count = buffer_token_count(app, buffer);
if (buffer->tokens_are_ready && pos >= 0 && pos < token_count && count > 0){
stream->app = app;
stream->buffer = buffer;
stream->base_tokens = data;
stream->count = count;
stream->start = round_down(pos, count);
stream->end = round_up(pos, count);
stream->token_count = token_count;
if (stream->start < 0){
stream->start = 0;
}
if (stream->end > stream->token_count){
stream->end = stream->token_count;
}
buffer_read_tokens(app, buffer, stream->start, stream->end, stream->base_tokens);
stream->tokens = stream->base_tokens - stream->start;
result = true;
}
return(result);
}
static Stream_Tokens
begin_temp_stream_token(Stream_Tokens *stream){
return(*stream);
}
static void
end_temp_stream_token(Stream_Tokens *stream, Stream_Tokens temp){
if (stream->start != temp.start || stream->end != temp.end){
Application_Links *app = stream->app;
buffer_read_tokens(app, temp.buffer, temp.start, temp.end, temp.base_tokens);
stream->tokens = stream->base_tokens - temp.start;
stream->start = temp.start;
stream->end = temp.end;
}
}
static bool32
forward_stream_tokens(Stream_Tokens *stream){
Application_Links *app = stream->app;
Buffer_Summary *buffer = stream->buffer;
bool32 result = false;
refresh_buffer(app, buffer);
if (stream->end < stream->token_count){
stream->start = stream->end;
stream->end += stream->count;
if (stream->end > stream->token_count){
stream->end = stream->token_count;
}
if (stream->start < stream->end){
buffer_read_tokens(app, buffer, stream->start, stream->end, stream->base_tokens);
stream->tokens = stream->base_tokens - stream->start;
result = true;
}
}
return(result);
}
static bool32
backward_stream_tokens(Stream_Tokens *stream){
Application_Links *app = stream->app;
Buffer_Summary *buffer = stream->buffer;
bool32 result = false;
refresh_buffer(app, buffer);
if (stream->start > 0){
stream->end = stream->start;
stream->start -= stream->count;
if (0 > stream->start){
stream->start = 0;
}
if (stream->start < stream->end){
buffer_read_tokens(app, buffer, stream->start, stream->end, stream->base_tokens);
stream->tokens = stream->base_tokens - stream->start;
result = true;
}
}
return(result);
}
// BOTTOM
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