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Diffstat (limited to '')
| -rw-r--r-- | bin/edi.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/bin/edi.c b/bin/edi.c deleted file mode 100644 index 0bd606cd..00000000 --- a/bin/edi.c +++ /dev/null @@ -1,204 +0,0 @@ -/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#define _XOPEN_SOURCE_EXTENDED - -#include <curses.h> -#include <err.h> -#include <locale.h> -#include <stdbool.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sysexits.h> -#include <unistd.h> - -static struct Span { - size_t at, to; -} Span(size_t at, size_t to) { - return (struct Span) { at, to }; -} - -static bool spanEqual(struct Span a, struct Span b) { - return a.at == b.at && a.to == b.to; -} -static bool spanIn(struct Span a, struct Span b) { - return a.at > b.at && a.to < b.to; -} -static bool spanHeadIn(struct Span a, struct Span b) { - return a.at > b.at && a.at < b.to; -} -static bool spanTailIn(struct Span a, struct Span b) { - return a.to > b.at && a.to < b.to; -} - -static struct Vec { - char *ptr; - size_t len; -} Vec(char *ptr, size_t len) { - return (struct Vec) { ptr, len }; -} - -static struct Vec vecHead(struct Vec vec, struct Span span, size_t at) { - return Vec(vec.ptr, at - span.at); -} -static struct Vec vecTail(struct Vec vec, struct Span span, size_t at) { - return Vec(vec.ptr + (at - span.at), vec.len - (at - span.at)); -} - -static struct Table { - struct Table *next, *prev; - size_t len; - struct Vec vec[]; -} *Table(size_t cap) { - size_t size = sizeof(struct Table) + cap * sizeof(struct Vec); - struct Table *table = malloc(size); - if (!table) err(EX_OSERR, "malloc"); - memset(table, 0, size); - return table; -} - -static struct TableIter { - struct Table *table; - size_t i; - struct Vec vec; - struct Span span; -} TableIter(struct Table *table) { - return (struct TableIter) { table, 0, Vec(NULL, 0), Span(0, 0) }; -} -static bool tableNext(struct TableIter *it) { - if (it->i == it->table->len) return false; - it->vec = it->table->vec[it->i++]; - it->span = Span(it->span.to, it->span.to + it->vec.len); - return true; -} -static bool tablePrev(struct TableIter *it) { - if (!it->i) return false; - it->vec = it->table->vec[--it->i]; - it->span = Span(it->span.at - it->vec.len, it->span.at); - return true; -} - -static struct Table *tableInsert(struct Table *prev, size_t at, struct Vec vec) { - struct Table *next = Table(prev->len + 2); - if (!prev->len) { - next->vec[next->len++] = vec; - return next; - } - struct Span span = Span(at, at + vec.len); - for (struct TableIter it = TableIter(prev); tableNext(&it); (void)it) { - if (it.span.at == at) { - next->vec[next->len++] = vec; - next->vec[next->len++] = it.vec; - } else if (spanHeadIn(span, it.span)) { - next->vec[next->len++] = vecHead(it.vec, it.span, at); - next->vec[next->len++] = vec; - next->vec[next->len++] = vecTail(it.vec, it.span, at); - } else { - next->vec[next->len++] = it.vec; - } - } - return next; -} - -static struct Table *tableDelete(struct Table *prev, struct Span span) { - struct Table *next = Table(prev->len + 1); - for (struct TableIter it = TableIter(prev); tableNext(&it); (void)it) { - if (spanIn(it.span, span) || spanEqual(it.span, span)) { - // drop - } else if (spanIn(span, it.span)) { - next->vec[next->len++] = vecHead(it.vec, it.span, span.at); - next->vec[next->len++] = vecTail(it.vec, it.span, span.to); - } else if (spanHeadIn(span, it.span)) { - next->vec[next->len++] = vecHead(it.vec, it.span, span.at); - } else if (spanTailIn(span, it.span)) { - next->vec[next->len++] = vecTail(it.vec, it.span, span.to); - } else { - next->vec[next->len++] = it.vec; - } - } - return next; -} - -static struct VecIter { - struct Vec vec; - size_t i; - wchar_t ch; -} VecIter(struct Vec vec, size_t i) { - return (struct VecIter) { vec, i, 0 }; -} -static bool vecNext(struct VecIter *it) { - if (it->i >= it->vec.len) return false; - int len = mbtowc(&it->ch, &it->vec.ptr[it->i], it->vec.len - it->i); - if (len < 0) errx(EX_DATAERR, "mbtowc"); - it->i += len; - return true; -} -static bool vecPrev(struct VecIter *it) { - if (!it->i) return false; - int len; - for (int n = 1; n < MB_CUR_MAX; ++n) { - len = mbtowc(&it->ch, &it->vec.ptr[it->i - n], n); - if (len > 0) break; - } - if (len < 0) errx(EX_DATAERR, "mbtowc"); - it->i -= len; - return true; -} - -//static void curse(void) { -// setlocale(LC_CTYPE, ""); -// initscr(); -// cbreak(); -// noecho(); -// keypad(stdscr, true); -// set_escdelay(100); -//} -// -//static void curseChar(wchar_t ch, attr_t attr, short color) { -// cchar_t cc; -// wchar_t ws[] = { ch, 0 }; -// setcchar(&cc, ws, attr, color, NULL); -// add_wch(&cc); -//} - -static void draw(struct Table *table) { - //move(0, 0); - struct TableIter it = TableIter(table); - tableNext(&it); - printf("(%zu,%zu)%.*s", it.span.at, it.span.to, (int)it.vec.len, it.vec.ptr); - tableNext(&it); - printf("(%zu,%zu)%.*s", it.span.at, it.span.to, (int)it.vec.len, it.vec.ptr); - tablePrev(&it); - printf("(%zu,%zu)%.*s", it.span.at, it.span.to, (int)it.vec.len, it.vec.ptr); - tablePrev(&it); - printf("(%zu,%zu)%.*s", it.span.at, it.span.to, (int)it.vec.len, it.vec.ptr); -} - -int main() { - struct Table *table = Table(0); - table = tableInsert(table, 0, Vec("Hello, world!\nGoodbye, world!\n", 30)); - table = tableDelete(table, Span(1, 5)); - table = tableInsert(table, 1, Vec("owdy", 4)); - table = tableDelete(table, Span(3, 6)); - table = tableInsert(table, 3, Vec(" Ω", 3)); - - //curse(); - draw(table); - //getch(); - //endwin(); -} |