117 lines
2.3 KiB
C++
117 lines
2.3 KiB
C++
#include "gap_buffer.hpp"
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#include "sh7091/serial.hpp"
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/*
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2 3 4 5 6 7
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s e
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[a] [ ] [b] [q] | [ ] [ ] [ ] [ ]
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i ^
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*/
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void line_init_from_buf(struct gap_buffer& gb,
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int32_t * offsets,
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int32_t size)
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{
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gb.line.offsets = offsets;
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gb.line.size = size;
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gb.line.length = 0;
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for (int32_t i = 0; i < gb.gap_start; i++) {
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serial::integer<uint32_t>(i);
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if (gb.buf[i] == '\n') {
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gb.line.offsets[gb.line.length++] = i;
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}
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}
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gb.line.gap = gb.line.length;
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serial::string("gbgapend\n");
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for (int32_t i = gb.gap_end; i < gb.size; i++) {
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serial::integer<uint32_t>(i);
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if (gb.buf[i] == '\n') {
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gb.line.offsets[gb.line.length++] = i;
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}
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}
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}
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void gap_init_from_buf(struct gap_buffer& gb,
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char_type * buf,
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int32_t size,
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int32_t length)
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{
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gb.buf = buf;
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gb.size = size;
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gb.gap_start = length;
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gb.gap_end = size;
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}
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/*
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void gap_resize(struct gap_buffer& gb)
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{
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for (int32_t i = (gb.size - 1); i >= gb.gap_end; i--) {
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gb.buf[i + gb.size] = gb.buf[i];
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}
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gb.gap_end += gb.size;
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gb.size += gb.size;
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}
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*/
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void gap_append(struct gap_buffer& gb, char_type c)
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{
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if (gb.gap_start == gb.gap_end) {
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return;
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//gap_resize(gb);
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}
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if (c == '\n') {
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for (int32_t i = gb.line.length - 1; i >= gb.line.gap; i--) {
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gb.line.offsets[i + 1] = gb.line.offsets[i];
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}
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gb.line.offsets[gb.line.gap++] = gb.gap_start;
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gb.line.length += 1;
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}
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gb.buf[gb.gap_start++] = c;
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}
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void gap_pop(struct gap_buffer& gb)
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{
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gb.gap_start--;
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}
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/*
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0 1 2 3 4 5 6 7
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[a] [b] [ ] [ ] [ ] [ ] [q] [r]
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^ e
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*/
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/*
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*/
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void gap_cursor_pos(struct gap_buffer& gb, int32_t delta)
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{
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if (delta > 0) {
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if (gb.gap_end + delta >= gb.size) {
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delta = gb.size - gb.gap_end;
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}
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for (int32_t i = 0; i < delta; i++) {
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char_type c = gb.buf[gb.gap_end++];
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if (c == '\n') {
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gb.line.offsets[gb.line.gap++] = gb.gap_start;
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}
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gb.buf[gb.gap_start++] = c;
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}
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} else {
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if (gb.gap_start + delta < 0) {
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delta = -gb.gap_start;
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}
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for (int32_t i = delta; i < 0; i++) {
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char_type c = gb.buf[--gb.gap_start];
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gb.buf[--gb.gap_end] = c;
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if (c == '\n') {
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gb.line.offsets[--gb.line.gap] = gb.gap_end;
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}
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}
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}
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}
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