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eeshow/delta.c: very coarse structural deltas (WIP)
This commit is contained in:
Werner Almesberger
parent
4418741fc6
commit
ba62fc4fc4
@ -13,7 +13,7 @@
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NAME = eeshow
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OBJS = main.o sch-parse.o sch-render.o lib-parse.o lib-render.o \
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gui.o gui-over.o gui-aoi.o fmt-pango.o \
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file.o git-util.o git-file.o git-hist.o \
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file.o git-util.o git-file.o git-hist.o delta.o \
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style.o fig.o record.o cro.o diff.o gfx.o dwg.o text.o misc.o
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CFLAGS = -g -Wall -Wextra -Wno-unused-parameter -Wshadow \
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246
eeshow/delta.c
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246
eeshow/delta.c
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@ -0,0 +1,246 @@
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/*
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* delta.c - Find differences in .sch files
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*
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* Written 2016 by Werner Almesberger
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* Copyright 2016 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stddef.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include "util.h"
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#include "text.h"
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#include "sch.h"
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#include "delta.h"
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/*
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* @@@ we should clone components and compare them, too
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*
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* if two components or sub-sheets mismatch in their field lists, we should
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* remove matching items from the lists.
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*
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* @@@@ line(A, B) == line(B, A), etc.
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*/
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static struct sch_obj *objs_clone(const struct sch_obj *objs)
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{
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struct sch_obj *new_objs = NULL;
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struct sch_obj **next = &new_objs;
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const struct sch_obj *obj;
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for (obj = objs; obj; obj = obj->next) {
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*next = alloc_type(struct sch_obj);
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**next = *obj;
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next = &(*next)->next;
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}
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*next = NULL;
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return new_objs;
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}
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static void add_obj(struct sheet *sch, struct sch_obj *obj)
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{
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*sch->next_obj = obj;
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sch->next_obj = &obj->next;
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obj->next = NULL;
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}
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static bool comp_fields_eq(const struct comp_field *a,
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const struct comp_field *b)
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{
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while (a && b) {
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if (a->txt.x != b->txt.x || a->txt.y != b->txt.y)
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return 0;
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if (a->txt.size != b->txt.size)
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return 0;
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if (a->txt.rot != b->txt.rot)
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return 0;
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if (a->txt.hor != b->txt.hor || a->txt.vert != b->txt.vert)
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return 0;
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if (strcmp(a->txt.s, b->txt.s))
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return 0;
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a = a->next;
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b = b->next;
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}
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return a == b;
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}
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static bool sheet_fields_eq(const struct sheet_field *a,
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const struct sheet_field *b)
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{
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const struct sheet_field *ta = a;
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const struct sheet_field *tb = b;
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for (ta = a; ta; ta = ta->next) {
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for (tb = b; tb; tb = tb->next) {
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if (ta->x != tb->x || ta->y != tb->y)
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continue;
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if (ta->dim != tb->dim)
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continue;
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if (ta->dim != tb->dim)
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continue;
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if (ta->shape != tb->shape)
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continue;
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if (strcmp(ta->s, tb->s))
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continue;
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goto match;
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}
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return 0;
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match:
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continue;
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}
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while (a && b) {
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a = a->next;
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b = b->next;
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}
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return a == b;
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}
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/*
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* @@@ idea: if we send all strings through a "unique" function, we can
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* memcmp things like "struct sch_text" without having to go through the
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* fields individually.
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*/
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static bool obj_eq(const struct sch_obj *a, const struct sch_obj *b)
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{
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if (a->type != b->type)
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return 0;
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if (a->x != b->x || a->y != b->y)
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return 0;
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switch (a->type) {
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case sch_obj_wire:
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if (a->u.wire.fn != b->u.wire.fn)
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return 0;
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if (a->x != b->x || a->y != b->y)
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return 0;
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if (a->u.wire.ex != b->u.wire.ex ||
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a->u.wire.ey != b->u.wire.ey)
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return 0;
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return 1;
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case sch_obj_junction:
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return 1;
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case sch_obj_noconn:
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return 1;
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case sch_obj_text:
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if (a->u.text.fn != b->u.text.fn)
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return 0;
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if (a->u.text.dir != b->u.text.dir)
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return 0;
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if (a->u.text.dim != b->u.text.dim)
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return 0;
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if (a->u.text.shape != b->u.text.shape)
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return 0;
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if (strcmp(a->u.text.s, b->u.text.s))
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return 0;
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return 1;
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case sch_obj_comp:
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if (a->u.comp.comp != b->u.comp.comp)
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return 0;
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if (a->u.comp.unit != b->u.comp.unit)
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return 0;
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if (memcmp(a->u.comp.m, b->u.comp.m, sizeof(a->u.comp.m)))
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return 0;
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return comp_fields_eq(a->u.comp.fields, b->u.comp.fields);
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case sch_obj_sheet:
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if (a->u.sheet.w != b->u.sheet.w)
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return 0;
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if (a->u.sheet.h != b->u.sheet.h)
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return 0;
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if (a->u.sheet.name_dim != b->u.sheet.name_dim)
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return 0;
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if (a->u.sheet.file_dim != b->u.sheet.file_dim)
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return 0;
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if (a->u.sheet.rotated != b->u.sheet.rotated)
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return 0;
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if (strcmp(a->u.sheet.name, b->u.sheet.name))
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return 0;
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if (strcmp(a->u.sheet.file, b->u.sheet.file))
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return 0;
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return sheet_fields_eq(a->u.sheet.fields, b->u.sheet.fields);
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default:
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abort();
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}
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}
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static void free_obj(struct sch_obj *obj)
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{
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/* there may be more to free once we get into cloning components */
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free(obj);
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}
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static void init_res(struct sheet *res)
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{
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res->title = NULL;
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res->objs = NULL;
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res->next_obj = &res->objs;
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res->parent = NULL;
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res->next = NULL;
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}
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void delta(const struct sheet *a, const struct sheet *b,
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struct sheet *res_a, struct sheet *res_b, struct sheet *res_ab)
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{
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struct sch_obj *objs_a, *objs_b;
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struct sch_obj *next_a;
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struct sch_obj **obj_b;
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init_res(res_a);
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init_res(res_b);
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init_res(res_ab);
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if (!strcmp(a->title, b->title)) {
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res_ab->title = a->title;
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} else {
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res_a->title = a->title;
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res_b->title = b->title;
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}
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objs_a = objs_clone(a->objs);
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objs_b = objs_clone(b->objs);
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while (objs_a) {
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next_a = objs_a->next;
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for (obj_b = &objs_b; *obj_b; obj_b = &(*obj_b)->next)
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if (obj_eq(objs_a, *obj_b)) {
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struct sch_obj *tmp = *obj_b;
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add_obj(res_ab, objs_a);
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*obj_b = tmp->next;
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free_obj(tmp);
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goto found;
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}
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add_obj(res_a, objs_a);
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found:
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objs_a = next_a;
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}
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res_b->objs = objs_b;
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}
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void delta_free(struct sheet *d)
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{
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struct sch_obj *next;
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while (d->objs) {
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next = d->objs->next;
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free_obj(d->objs);
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d->objs = next;
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}
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}
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24
eeshow/delta.h
Normal file
24
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Normal file
@ -0,0 +1,24 @@
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/*
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* delta.h - Find differences in .sch files
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*
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* Written 2016 by Werner Almesberger
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* Copyright 2016 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef DELTA_H
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#define DELTA_H
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#include "sch.h"
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void delta(const struct sheet *a, const struct sheet *b,
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struct sheet *res_a, struct sheet *res_b, struct sheet *res_ab);
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void delta_free(struct sheet *d);
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#endif /* !DELTA_H */
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