From f480177cba8c106402884338d2a690daf7cc316c Mon Sep 17 00:00:00 2001 From: June McEnroe Date: Tue, 1 Jan 2019 01:01:19 -0500 Subject: Remove edi (again) --- bin/edi/store.c | 211 -------------------------------------------------------- 1 file changed, 211 deletions(-) delete mode 100644 bin/edi/store.c (limited to 'bin/edi/store.c') diff --git a/bin/edi/store.c b/bin/edi/store.c deleted file mode 100644 index d7b4e71e..00000000 --- a/bin/edi/store.c +++ /dev/null @@ -1,211 +0,0 @@ -/* Copyright (C) 2018 June McEnroe - * - * 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 . - */ - -#include -#include -#include -#include -#include - -#include "edi.h" - -static const char Magic[3] = "EDI"; -static const char Version = 1; - -static enum Error -write(FILE *stream, const void *ptr, size_t size, size_t nitems) { - size_t n = fwrite(ptr, size, nitems, stream); - return (n < nitems ? Errno + errno : Ok); -} - -static enum Error writeBuffer(FILE *stream, const struct Buffer *buf) { - size_t len = 0; - const struct Block *block; - for (block = buf->block; block; block = block->prev) { - len += block->len; - } - enum Error error = write(stream, &len, sizeof(len), 1); - if (error) return error; - for (block = buf->block; block; block = block->prev) { - error = write(stream, block->chars, sizeof(wchar_t), block->len); - if (error) return error; - } - return Ok; -} - -static enum Error -writeSlice(FILE *stream, const struct Buffer *buf, struct Slice slice) { - size_t offset = 0; - const struct Block *block = buf->block; - while (block) { - if ( - slice.ptr >= block->chars && slice.ptr < &block->chars[block->len] - ) break; - offset += block->len; - block = block->prev; - } - assert(block); - size_t ptr = offset + (size_t)(slice.ptr - block->chars); - enum Error error = write(stream, &ptr, sizeof(ptr), 1); - if (error) return error; - return write(stream, &slice.len, sizeof(slice.len), 1); -} - -static enum Error -writeTable(FILE *stream, const struct Buffer *buf, const struct Table *table) { - enum Error error = write(stream, &table->len, sizeof(table->len), 1); - for (size_t i = 0; i < table->len; ++i) { - error = writeSlice(stream, buf, table->slices[i]); - if (error) return error; - } - return Ok; -} - -static enum Error -writeState(FILE *stream, const struct Buffer *buf, const struct State *state) { - enum Error error; - error = write(stream, &state->prev, sizeof(state->prev), 1); - if (error) return error; - error = write(stream, &state->next, sizeof(state->next), 1); - if (error) return error; - return writeTable(stream, buf, &state->table); -} - -static enum Error -writeLog(FILE *stream, const struct Buffer *buf, const struct Log *log) { - enum Error error; - error = write(stream, &log->state, sizeof(log->state), 1); - if (error) return error; - error = write(stream, &log->len, sizeof(log->len), 1); - if (error) return error; - for (size_t i = 0; i < log->len; ++i) { - error = writeState(stream, buf, &log->states[i]); - if (error) return error; - } - return Ok; -} - -enum Error storeWrite(FILE *stream, const struct Edit *edit) { - enum Error error; - error = write(stream, Magic, sizeof(Magic), 1); - if (error) return error; - error = write(stream, &Version, sizeof(Version), 1); - if (error) return error; - error = writeBuffer(stream, &edit->buf); - if (error) return error; - return writeLog(stream, &edit->buf, &edit->log); -} - -static enum Error read(FILE *stream, void *ptr, size_t size, size_t nitems) { - size_t n = fread(ptr, size, nitems, stream); - if (ferror(stream)) return Errno + errno; - return (n < nitems ? StoreEOF : Ok); -} - -static enum Error readMagic(FILE *stream) { - char magic[3]; - enum Error error = read(stream, magic, sizeof(magic), 1); - if (error) return error; - return ( - magic[0] != Magic[0] || magic[1] != Magic[1] || magic[2] != Magic[2] - ? StoreMagic - : Ok - ); -} - -static enum Error readVersion(FILE *stream) { - char version; - enum Error error = read(stream, &version, sizeof(version), 1); - if (error) return error; - return (version != Version ? StoreVersion : Ok); -} - -static enum Error readBuffer(FILE *stream, struct Buffer *buf) { - size_t len; - enum Error error = read(stream, &len, sizeof(len), 1); - if (error) return error; - wchar_t *dest = bufferDest(buf, len); - return read(stream, dest, sizeof(wchar_t), len); -} - -static enum Error -readSlice(FILE *stream, struct Buffer *buf, struct Table *table) { - enum Error error; - size_t ptr, len; - error = read(stream, &ptr, sizeof(ptr), 1); - if (error) return error; - error = read(stream, &len, sizeof(len), 1); - if (error) return error; - tablePush(table, (struct Slice) { &buf->slice.ptr[ptr], len }); - return Ok; -} - -static enum Error -readTable(FILE *stream, struct Buffer *buf, struct Table *table) { - size_t len; - enum Error error = read(stream, &len, sizeof(len), 1); - if (error) return error; - *table = tableAlloc(len); - for (size_t i = 0; i < len; ++i) { - error = readSlice(stream, buf, table); - if (error) return error; - } - return Ok; -} - -static enum Error -readState(FILE *stream, struct Buffer *buf, size_t offset, struct Log *log) { - enum Error error; - size_t prev, next; - struct Table table; - error = read(stream, &prev, sizeof(prev), 1); - if (error) return error; - error = read(stream, &next, sizeof(next), 1); - if (error) return error; - error = readTable(stream, buf, &table); - if (error) return error; - logPush(log, table); - log->states[log->state].prev = offset + prev; - log->states[log->state].next = offset + next; - return Ok; -} - -static enum Error readLog(FILE *stream, struct Buffer *buf, struct Log *log) { - enum Error error; - size_t state, len; - error = read(stream, &state, sizeof(state), 1); - if (error) return error; - error = read(stream, &len, sizeof(len), 1); - if (error) return error; - size_t offset = log->len; - for (size_t i = 0; i < len; ++i) { - error = readState(stream, buf, offset, log); - if (error) return error; - } - log->state = offset + state; - return Ok; -} - -enum Error storeRead(FILE *stream, struct Edit *edit) { - enum Error error; - error = readMagic(stream); - if (error) return error; - error = readVersion(stream); - if (error) return error; - error = readBuffer(stream, &edit->buf); - if (error) return error; - return readLog(stream, &edit->buf, &edit->log); -} -- cgit 1.4.1