841 lines
21 KiB
C++
841 lines
21 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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* Four Tech
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*
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* public domain -- no warranty is offered or implied; use this code at your own risk
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*
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* 16.10.2015
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*
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* Buffer data object
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* type - Golden Array
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*
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*/
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// TOP
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#ifndef defines_4tech
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#define inline_4tech inline
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#define internal_4tech static
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#define memset_4tech memset
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#define memcpy_4tech memcpy
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#define memmove_4tech memmove
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#define defines_4tech 1
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#define debug_4tech(x) x
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#endif
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#ifndef Assert
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#define Assert
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#endif
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typedef struct{
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char *data;
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int size, max;
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float *line_widths;
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int *line_starts;
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int line_count;
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int line_max;
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int widths_max;
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} Buffer;
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typedef struct{
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Buffer *buffer;
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char *data;
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int size;
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} Buffer_Stringify_Loop;
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inline_4tech Buffer_Stringify_Loop
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buffer_stringify_loop(Buffer *buffer, int start, int end){
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Buffer_Stringify_Loop result;
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if (0 <= start && start <= end && end < buffer->size){
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result.buffer = buffer;
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result.data = buffer->data + start;
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result.size = end - start;
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}
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else result.buffer = 0;
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return(result);
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}
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inline_4tech int
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buffer_stringify_good(Buffer_Stringify_Loop *loop){
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int result;
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result = (loop->buffer != 0);
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return(result);
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}
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inline_4tech void
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buffer_stringify_next(Buffer_Stringify_Loop *loop){
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loop->buffer = 0;
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}
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inline_4tech void
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buffer_stringify(Buffer *buffer, int start, int end, char *out){
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for (Buffer_Stringify_Loop loop = buffer_stringify_loop(buffer, start, end);
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buffer_stringify_good(&loop);
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buffer_stringify_next(&loop)){
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memcpy_4tech(out, loop.data, loop.size);
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out += loop.size;
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}
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}
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internal_4tech int
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buffer_count_newlines(Buffer *buffer, int start, int end){
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int new_line, count;
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char *data;
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int i;
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Assert(0 <= start);
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Assert(start <= end);
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Assert(end < buffer->size);
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data = buffer->data;
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count = 0;
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for (i = start; i < end; ++i){
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new_line = (data[i] == '\n');
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count += new_line;
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}
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return(count);
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}
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typedef struct{
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int i;
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int count;
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int start;
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} Buffer_Measure_Starts;
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internal_4tech int
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buffer_measure_starts(Buffer_Measure_Starts *state, Buffer *buffer){
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int *starts;
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int max;
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char *data;
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int size;
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int start, count, i;
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int result;
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starts = buffer->line_starts;
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max = buffer->line_max;
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data = buffer->data;
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size = buffer->size;
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result = 0;
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i = state->i;
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count = state->count;
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start = state->start;
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for (; i < size; ++i){
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if (data[i] == '\n'){
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if (count == max){
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result = 1;
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break;
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}
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starts[count++] = start;
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start = i + 1;
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}
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}
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if (i == size){
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if (count == max) result = 1;
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else starts[count++] = start;
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}
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state->i = i;
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state->count = count;
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state->start = start;
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return(result);
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}
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inline_4tech float
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measure_character(void *advance_data, int offset, int stride, int *new_line, char character){
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char *advances;
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float width;
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advances = (char*)advance_data + offset;
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switch (character){
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case 0: width = 0; *new_line = 1; break;
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case '\n': width = *(float*)(advances + stride * '\n'); *new_line = 1; break;
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case '\r': width = *(float*)(advances + stride * '\\') + *(float*)(advances + stride * '\r'); break;
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default: width = *(float*)(advances + stride * character);
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}
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return(width);
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}
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#if 0
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internal_4tech void
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buffer_measure_widths(Buffer *buffer, void *advance_data, int offset, int stride){
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float *widths;
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debug_4tech(int *starts);
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int line_count;
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char *data;
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int size;
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int i, j, new_line;
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float width;
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char ch, next;
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Assert(buffer->widths_max >= buffer->line_count);
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widths = buffer->line_widths;
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debug_4tech(starts = buffer->line_starts);
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line_count = buffer->line_count;
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data = buffer->data;
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size = buffer->size;
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Assert(size < buffer->max);
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data[size] = 0;
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for (i = 0, j = 0; i < line_count; ++i){
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Assert(j == starts[i]);
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new_line = 0;
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width = 0;
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ch = data[j];
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next = data[++j];
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while (new_line == 0){
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width += measure_character(advance_data, offset, stride, &new_line, ch);
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ch = next;
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next = data[++j];
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}
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--j;
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widths[i] = width;
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}
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}
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#endif
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internal_4tech void
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buffer_remeasure_starts(Buffer *buffer, int line_start, int line_end, int line_shift, int text_shift){
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int *lines;
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int line_count;
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char *data;
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int size;
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int line_i, char_i, start;
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char character;
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lines = buffer->line_starts;
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line_count = buffer->line_count;
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Assert(0 <= line_start);
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Assert(line_start <= line_end);
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Assert(line_end < line_count);
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Assert(line_count + line_shift <= buffer->line_max);
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if (line_shift != 0){
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memmove_4tech(lines + line_end + line_shift + 1, lines + line_end + 1,
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sizeof(int)*(line_count - line_end - 1));
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line_count += line_shift;
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}
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if (text_shift != 0){
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line_i = line_end + 1;
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lines = lines + line_i;
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for (; line_i < line_count; ++line_i, ++lines){
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*lines += text_shift;
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}
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lines = buffer->line_starts;
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}
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size = buffer->size;
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data = buffer->data;
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char_i = lines[line_start];
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line_i = line_start;
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Assert(size < buffer->max);
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data[size] = '\n';
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start = char_i;
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for (; char_i <= size; ++char_i){
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character = data[char_i];
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if (character == '\n'){
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if (line_i > line_end && start == lines[line_i]) break;
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lines[line_i++] = start;
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start = char_i + 1;
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}
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}
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Assert(line_count >= 1);
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buffer->line_count = line_count;
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}
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internal_4tech void
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buffer_remeasure_widths(Buffer *buffer, void *advance_data, int offset, int stride,
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int line_start, int line_end, int line_shift){
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int *starts;
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float *widths;
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int line_count;
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char *data;
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int size;
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int i, j, new_line;
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float width;
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char ch, next;
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starts = buffer->line_starts;
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widths = buffer->line_widths;
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line_count = buffer->line_count;
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Assert(0 <= line_start);
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Assert(line_start <= line_end);
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Assert(line_end < line_count);
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Assert(line_count <= buffer->widths_max);
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if (line_shift != 0){
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memmove_4tech(widths + line_end + line_shift + 1, widths + line_end + 1,
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sizeof(float)*(line_count - line_end - 1));
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line_count += line_shift;
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}
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data = buffer->data;
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size = buffer->size;
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Assert(size < buffer->max);
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data[size] = 0;
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i = line_start;
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j = starts[i];
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for (; i <= line_end; ++i){
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Assert(j == starts[i]);
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new_line = 0;
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width = 0;
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ch = data[j];
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next = data[++j];
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while (new_line == 0){
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width += measure_character(advance_data, offset, stride, &new_line, ch);
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ch = next;
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next = data[++j];
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}
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--j;
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widths[i] = width;
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}
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}
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inline_4tech void
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buffer_measure_widths(Buffer *buffer, void *advance_data, int offset, int stride){
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Assert(buffer->line_count >= 1);
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buffer_remeasure_widths(buffer, advance_data, offset, stride, 0, buffer->line_count-1, 0);
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}
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internal_4tech int
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buffer_get_line_index(Buffer *buffer, int pos, int l_bound, int u_bound){
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int *lines;
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int start, end;
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int i;
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Assert(0 <= l_bound);
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Assert(l_bound <= u_bound);
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Assert(u_bound <= buffer->line_count);
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start = l_bound;
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end = u_bound;
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lines = buffer->line_starts;
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for (;;){
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i = (start + end) >> 1;
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if (lines[i] < pos) start = i;
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else if (lines[i] > pos) end = i;
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else{
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start = i;
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break;
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}
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Assert(start < end);
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if (start == end - 1) break;
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}
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return(start);
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}
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internal_4tech int
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buffer_replace_range(Buffer *buffer, int start, int end, char *str, int len, int *shift_amount){
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char *data;
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int result;
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*shift_amount = (len - (end - start));
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if (*shift_amount + buffer->size + 1 <= buffer->max){
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data = (char*)buffer->data;
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memmove_4tech(data + end + *shift_amount, data + end, buffer->size - end);
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buffer->size += *shift_amount;
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data[buffer->size] = 0;
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if (len != 0) memcpy_4tech(data + start, str, len);
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result = 0;
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}
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else{
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result = *shift_amount + buffer->size + 1;
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}
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return(result);
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}
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typedef struct{
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int pos, index;
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} Cursor_With_Index;
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inline_4tech void
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write_cursor_with_index(Cursor_With_Index *positions, int *count, int pos){
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positions[*count].index = *count;
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positions[*count].pos = pos;
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++*count;
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}
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#define CursorSwap__(a,b) { Cursor_With_Index t = a; a = b; b = t; }
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internal_4tech void
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buffer_quick_sort_cursors(Cursor_With_Index *positions, int start, int pivot){
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int i, mid;
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int pivot_pos;
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mid = start;
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pivot_pos = positions[pivot].pos;
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for (i = mid; i < pivot; ++i){
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if (positions[i].pos < pivot_pos){
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CursorSwap__(positions[mid], positions[i]);
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++mid;
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}
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}
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CursorSwap__(positions[mid], positions[pivot]);
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if (start < mid - 1) buffer_quick_sort_cursors(positions, start, mid - 1);
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if (mid + 1 < pivot) buffer_quick_sort_cursors(positions, mid + 1, pivot);
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}
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inline_4tech void
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buffer_sort_cursors(Cursor_With_Index *positions, int count){
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Assert(count > 0);
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buffer_quick_sort_cursors(positions, 0, count-1);
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}
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internal_4tech void
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buffer_quick_unsort_cursors(Cursor_With_Index *positions, int start, int pivot){
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int i, mid;
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int pivot_index;
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mid = start;
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pivot_index = positions[pivot].index;
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for (i = mid; i < pivot; ++i){
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if (positions[i].index < pivot_index){
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CursorSwap__(positions[mid], positions[i]);
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++mid;
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}
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}
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CursorSwap__(positions[mid], positions[pivot]);
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if (start < mid - 1) buffer_quick_unsort_cursors(positions, start, mid - 1);
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if (mid + 1 < pivot) buffer_quick_unsort_cursors(positions, mid + 1, pivot);
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}
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#undef CursorSwap__
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inline_4tech void
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buffer_unsort_cursors(Cursor_With_Index *positions, int count){
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Assert(count > 0);
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buffer_quick_unsort_cursors(positions, 0, count-1);
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}
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internal_4tech void
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buffer_update_cursors(Cursor_With_Index *sorted_positions, int count, int start, int end, int len){
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Cursor_With_Index *position;
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int shift_amount;
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shift_amount = (len - (end - start));
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position = sorted_positions + count - 1;
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for (; position >= sorted_positions && position->pos >= end; --position) position->pos += shift_amount;
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for (; position >= sorted_positions && position->pos >= start; --position) position->pos = start;
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}
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typedef enum{
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buffer_seek_pos,
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buffer_seek_wrapped_xy,
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buffer_seek_unwrapped_xy,
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buffer_seek_line_char
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} Buffer_Seek_Type;
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typedef struct{
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Buffer_Seek_Type type;
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union{
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struct { int pos; };
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struct { int round_down; float x, y; };
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struct { int line, character; };
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};
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} Buffer_Seek;
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inline_4tech Buffer_Seek
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seek_pos(int pos){
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Buffer_Seek result;
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result.type = buffer_seek_pos;
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result.pos = pos;
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return(result);
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}
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inline_4tech Buffer_Seek
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seek_wrapped_xy(float x, float y, int round_down){
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Buffer_Seek result;
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result.type = buffer_seek_wrapped_xy;
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result.x = x;
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result.y = y;
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result.round_down = round_down;
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return(result);
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}
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inline_4tech Buffer_Seek
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seek_unwrapped_xy(float x, float y, int round_down){
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Buffer_Seek result;
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result.type = buffer_seek_unwrapped_xy;
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result.x = x;
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result.y = y;
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result.round_down = round_down;
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return(result);
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}
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inline_4tech Buffer_Seek
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seek_line_char(int line, int character){
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Buffer_Seek result;
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result.type = buffer_seek_line_char;
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result.line = line;
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result.character = character;
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return(result);
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}
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typedef struct{
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int pos;
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int line, character;
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float unwrapped_x, unwrapped_y;
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float wrapped_x, wrapped_y;
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} Full_Cursor;
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internal_4tech Full_Cursor
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buffer_cursor_seek(Buffer *buffer, Buffer_Seek seek,
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float max_width, float font_height, void *advance_data, int offset, int stride, Full_Cursor cursor){
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Full_Cursor prev_cursor;
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char *data, *advances;
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int size;
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int do_newline;
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char ch, next;
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float ch_width;
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int get_out;
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int xy_seek;
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float x, y, px;
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data = buffer->data;
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size = buffer->size;
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Assert(size < buffer->max);
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data[size] = 0;
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advances = (char*)advance_data + offset;
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x = 0;
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y = 0;
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px = 0;
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xy_seek = (seek.type == buffer_seek_wrapped_xy || seek.type == buffer_seek_unwrapped_xy);
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for (;;){
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prev_cursor = cursor;
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ch_width = 0;
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ch = data[cursor.pos];
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next = data[cursor.pos+1];
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switch (ch){
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case '\n': do_newline = 1; break;
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case '\r':
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do_newline = 0;
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++cursor.character;
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ch_width = *(float*)(advances + stride * '\\') + *(float*)(advances + stride * 'r');
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break;
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default:
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do_newline = 0;
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++cursor.character;
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ch_width = *(float*)(advances + stride * ch);
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break;
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}
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if (cursor.wrapped_x + ch_width >= max_width){
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cursor.wrapped_y += font_height;
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cursor.wrapped_x = 0;
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prev_cursor = cursor;
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}
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cursor.unwrapped_x += ch_width;
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cursor.wrapped_x += ch_width;
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if (do_newline){
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++cursor.line;
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cursor.unwrapped_y += font_height;
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cursor.wrapped_y += font_height;
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cursor.character = 0;
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cursor.unwrapped_x = 0;
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cursor.wrapped_x = 0;
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}
|
|
|
|
++cursor.pos;
|
|
|
|
if (cursor.pos > size){
|
|
cursor = prev_cursor;
|
|
break;
|
|
}
|
|
|
|
get_out = 0;
|
|
|
|
switch (seek.type){
|
|
case buffer_seek_pos:
|
|
if (cursor.pos > seek.pos){
|
|
cursor = prev_cursor;
|
|
get_out = 1;
|
|
}break;
|
|
|
|
case buffer_seek_wrapped_xy:
|
|
x = cursor.wrapped_x; px = prev_cursor.wrapped_x;
|
|
y = cursor.wrapped_y; break;
|
|
|
|
case buffer_seek_unwrapped_xy:
|
|
x = cursor.unwrapped_x; px = prev_cursor.unwrapped_x;
|
|
y = cursor.unwrapped_y; break;
|
|
|
|
case buffer_seek_line_char:
|
|
if (cursor.line == seek.line && cursor.character >= seek.character){
|
|
get_out = 1;
|
|
}
|
|
else if (cursor.line > seek.line){
|
|
cursor = prev_cursor;
|
|
get_out = 1;
|
|
}break;
|
|
}
|
|
|
|
if (get_out) break;
|
|
if (xy_seek){
|
|
if (y > seek.y){
|
|
cursor = prev_cursor;
|
|
break;
|
|
}
|
|
|
|
if (y > seek.y - font_height && x >= seek.x){
|
|
if (!seek.round_down){
|
|
if ((seek.x - px) < (x - seek.x)) cursor = prev_cursor;
|
|
break;
|
|
}
|
|
|
|
if (x > seek.x){
|
|
cursor = prev_cursor;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return(cursor);
|
|
}
|
|
|
|
typedef struct{
|
|
char *str;
|
|
int len;
|
|
int start, end;
|
|
} Buffer_Edit;
|
|
|
|
internal_4tech int
|
|
buffer_batch_debug_sort_check(Buffer_Edit *sorted_edits, int edit_count){
|
|
Buffer_Edit *edit;
|
|
int i, result, start_point;
|
|
|
|
result = 1;
|
|
start_point = 0;
|
|
|
|
edit = sorted_edits;
|
|
for (i = 0; i < edit_count; ++i, ++edit){
|
|
if (start_point > edit->start){
|
|
result = 0; break;
|
|
}
|
|
start_point = (edit->end < edit->start + 1)?edit->start + 1:edit->end;
|
|
}
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech int
|
|
buffer_batch_edit_max_shift(Buffer_Edit *sorted_edits, int edit_count){
|
|
Buffer_Edit *edit;
|
|
int i, result;
|
|
int shift_total, shift_max;
|
|
|
|
result = 0;
|
|
shift_total = 0;
|
|
shift_max = 0;
|
|
|
|
edit = sorted_edits;
|
|
for (i = 0; i < edit_count; ++i, ++edit){
|
|
shift_total += (edit->len - (edit->end - edit->start));
|
|
if (shift_total > shift_max) shift_max = shift_total;
|
|
}
|
|
|
|
return shift_max;
|
|
}
|
|
|
|
typedef struct{
|
|
int i;
|
|
int shift_total;
|
|
} Buffer_Batch_State;
|
|
|
|
internal_4tech int
|
|
buffer_batch_edit_step(Buffer_Batch_State *state, Buffer *buffer, Buffer_Edit *sorted_edits, int edit_count){
|
|
Buffer_Edit *edit;
|
|
int i, result;
|
|
int shift_total, shift_amount;
|
|
|
|
result = 0;
|
|
shift_total = state->shift_total;
|
|
i = state->i;
|
|
|
|
edit = sorted_edits + i;
|
|
for (; i < edit_count; ++i, ++edit){
|
|
result = buffer_replace_range(buffer, edit->start + shift_total, edit->end + shift_total,
|
|
edit->str, edit->len, &shift_amount);
|
|
if (result) break;
|
|
shift_total += shift_amount;
|
|
}
|
|
|
|
state->shift_total = shift_total;
|
|
state->i = i;
|
|
|
|
return result;
|
|
}
|
|
|
|
internal_4tech void
|
|
buffer_batch_edit(Buffer *buffer, Buffer_Edit *sorted_edits, int edit_count){
|
|
Buffer_Batch_State state;
|
|
debug_4tech(int result);
|
|
|
|
state.i = 0;
|
|
state.shift_total = 0;
|
|
|
|
debug_4tech(result =)
|
|
buffer_batch_edit_step(&state, buffer, sorted_edits, edit_count);
|
|
Assert(result == 0);
|
|
}
|
|
|
|
internal_4tech void
|
|
buffer_batch_edit_update_cursors(Cursor_With_Index *sorted_positions, int count, Buffer_Edit *sorted_edits, int edit_count){
|
|
Cursor_With_Index *position, *end_position;
|
|
Buffer_Edit *edit, *end_edit;
|
|
int start, end;
|
|
int shift_amount;
|
|
|
|
position = sorted_positions;
|
|
end_position = sorted_positions + count;
|
|
|
|
edit = sorted_edits;
|
|
end_edit = sorted_edits + edit_count;
|
|
|
|
shift_amount = 0;
|
|
|
|
for (; edit < end_edit && position < end_position; ++edit){
|
|
start = edit->start;
|
|
end = edit->end;
|
|
|
|
for (; position->pos < start && position < end_position; ++position){
|
|
position->pos += shift_amount;
|
|
}
|
|
|
|
for (; position->pos < end && position < end_position; ++position){
|
|
position->pos = start + shift_amount;
|
|
}
|
|
|
|
shift_amount += (edit->len - (end - start));
|
|
}
|
|
|
|
for (; position < end_position; ++position){
|
|
position->pos += shift_amount;
|
|
}
|
|
}
|
|
|
|
internal_4tech int
|
|
buffer_find_hard_start(Buffer *buffer, int line_start, int *all_whitespace, int *all_space,
|
|
int *preferred_indent, int tab_width){
|
|
char *data;
|
|
int size;
|
|
int result;
|
|
char c;
|
|
|
|
*all_space = 0;
|
|
*preferred_indent = 0;
|
|
|
|
data = buffer->data;
|
|
size = buffer->size;
|
|
|
|
tab_width -= 1;
|
|
|
|
for (result = line_start; result < size; ++result){
|
|
c = data[result];
|
|
if (c == '\n' || c == 0){
|
|
*all_whitespace = 1;
|
|
break;
|
|
}
|
|
if (c >= '!' && c <= '~') break;
|
|
if (c == '\t') *preferred_indent += tab_width;
|
|
if (c != ' ') *all_space = 0;
|
|
*preferred_indent += 1;
|
|
}
|
|
|
|
return(result);
|
|
}
|
|
|
|
internal_4tech void
|
|
buffer_eol_convert_in(Buffer *buffer){
|
|
char *data;
|
|
int size;
|
|
int i;
|
|
|
|
data = buffer->data;
|
|
size = buffer->size;
|
|
Assert(size < buffer->max);
|
|
data[size] = 0;
|
|
|
|
for (i = 0; i < size; ++i){
|
|
if (data[i] == '\r' && data[i+1] == '\n'){
|
|
memmove_4tech(data + i, data + i + 1, size - i);
|
|
size -= 1;
|
|
}
|
|
}
|
|
|
|
buffer->size = size;
|
|
}
|
|
|
|
inline_4tech int
|
|
buffer_eol_convert_out_size(Buffer *buffer){
|
|
int size;
|
|
size = buffer->size + buffer->line_count;
|
|
return(size);
|
|
}
|
|
|
|
internal_4tech void
|
|
buffer_eol_convert_out(Buffer *buffer){
|
|
char *data;
|
|
int size;
|
|
int i;
|
|
|
|
data = buffer->data;
|
|
size = buffer->size;
|
|
Assert(buffer_eol_convert_out_size(buffer) < buffer->max);
|
|
data[size] = 0;
|
|
|
|
for (i = 0; i < size; ++i){
|
|
if (data[i] == '\n'){
|
|
memmove_4tech(data + i, data + i + 1, size - i);
|
|
data[i] = '\r';
|
|
++i;
|
|
}
|
|
}
|
|
|
|
buffer->size = size;
|
|
}
|
|
|
|
// BOTTOM
|
|
|