split some things out

This commit is contained in:
Kyle Isom 2020-02-12 02:38:06 +02:00
parent fd45ff4019
commit e4bd49d3dc
5 changed files with 210 additions and 159 deletions

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@ -1,5 +1,5 @@
BIN := ke
OBJS := main.o abuf.o
OBJS := abuf.o erow.o main.o
LDFLAGS :=
CFLAGS := -pedantic -Wall -Werror -Wextra -O0 -std=c99 -g

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@ -1,7 +1,7 @@
#include <stdlib.h>
#include <string.h>
#include "abuf.h"
#include "defs.h"
void

69
ke/defs.h Normal file
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@ -0,0 +1,69 @@
#ifndef KE_DEFS_H
#define KE_DEFS_H
#include <termios.h>
#define TAB_STOP 8
/*
* abuf is an append buffer.
*/
struct abuf {
char *b;
int len;
};
#define ABUF_INIT {NULL, 0}
/*
* erow is an editor row
*/
struct erow {
char *line;
char *render;
int size;
int rsize;
};
static struct {
struct termios entry_term;
int rows, cols;
int curx, cury;
int rx;
int mode;
int nrows;
int rowoffs, coloffs;
struct erow *row;
char *filename;
int dirty;
int dirtyex;
char msg[80];
time_t msgtm;
} editor;
/*
* Function declarations.
*/
/* append buffer */
void ab_append(struct abuf *buf, const char *s, int len);
void ab_free(struct abuf *buf);
/* editor row */
int erow_render_to_cursor(struct erow *row, int cx);
int erow_cursor_to_render(struct erow *row, int rx);
void erow_update(struct erow *row);
void erow_insert(int at, char *s, int len);
void erow_free(struct erow *row);
#endif /* KE_DEFS_H */

117
ke/erow.c Normal file
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@ -0,0 +1,117 @@
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "defs.h"
int
erow_render_to_cursor(struct erow *row, int cx)
{
int rx = 0;
int j;
for (j = 0; j < cx; j++) {
if (row->line[j] == '\t') {
rx += (TAB_STOP-1) - (rx%TAB_STOP);
}
rx++;
}
return rx;
}
int
erow_cursor_to_render(struct erow *row, int rx)
{
int cur_rx = 0;
int curx = 0;
for (curx = 0; curx < row->size; curx++) {
if (row->line[curx] == '\t') {
cur_rx += (TAB_STOP - 1) - (cur_rx % TAB_STOP);
}
cur_rx++;
if (cur_rx > rx) {
break;
}
}
return curx;
}
void
erow_update(struct erow *row)
{
int i = 0, j;
int tabs = 0;
/*
* TODO(kyle): I'm not thrilled with this double-render.
*/
for (j = 0; j < row->size; j++) {
if (row->line[j] == '\t') {
tabs++;
}
}
free(row->render);
row->render = NULL;
row->render = malloc(row->size + (tabs * (TAB_STOP-1)) + 1);
assert(row->render != NULL);
for (j = 0; j < row->size; j++) {
if (row->line[j] == '\t') {
do {
row->render[i++] = ' ';
} while ((i % TAB_STOP) != 0);
} else {
row->render[i++] = row->line[j];
}
}
row->render[i] = '\0';
row->rsize = i;
}
void
erow_insert(int at, char *s, int len)
{
if (at < 0 || at > editor.nrows) {
return;
}
editor.row = realloc(editor.row, sizeof(struct erow) * (editor.nrows + 1));
assert(editor.row != NULL);
if (at < editor.nrows) {
memmove(&editor.row[at+1], &editor.row[at],
sizeof(struct erow) * (editor.nrows - at + 1));
}
editor.row[at].size = len;
editor.row[at].line = malloc(len+1);
memcpy(editor.row[at].line, s, len);
editor.row[at].line[len] = '\0';
editor.row[at].rsize = 0;
editor.row[at].render = NULL;
erow_update(&editor.row[at]);
editor.nrows++;
}
void
erow_free(struct erow *row)
{
free(row->render);
free(row->line);
row->render = NULL;
row->line = NULL;
}

179
ke/main.c
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@ -18,7 +18,7 @@
#include <time.h>
#include <unistd.h>
#include "abuf.h"
#include "defs.h"
#define KE_VERSION "0.0.1-pre"
@ -60,31 +60,6 @@ enum KeyPress {
void disable_termraw();
typedef struct erow {
char *line;
char *render;
int size;
int rsize;
} erow;
struct {
struct termios entry_term;
int rows, cols;
int curx, cury;
int rx;
int mode;
int nrows;
int rowoffs, coloffs;
erow *row;
char *filename;
int dirty;
int dirtyex;
char msg[80];
time_t msgtm;
} editor;
void
die(const char *s)
@ -125,117 +100,6 @@ get_winsz(int *rows, int *cols)
}
int
row_render_to_cursor(erow *row, int cx)
{
int rx = 0;
int j;
for (j = 0; j < cx; j++) {
if (row->line[j] == '\t') {
rx += (TAB_STOP-1) - (rx%TAB_STOP);
}
rx++;
}
return rx;
}
int
row_cursor_to_render(erow *row, int rx)
{
int cur_rx = 0;
int curx = 0;
for (curx = 0; curx < row->size; curx++) {
if (row->line[curx] == '\t') {
cur_rx += (TAB_STOP - 1) - (cur_rx % TAB_STOP);
}
cur_rx++;
if (cur_rx > rx) {
break;
}
}
return curx;
}
void
update_row(erow *row)
{
int i = 0, j;
int tabs = 0;
/*
* TODO(kyle): I'm not thrilled with this double-render.
*/
for (j = 0; j < row->size; j++) {
if (row->line[j] == '\t') {
tabs++;
}
}
free(row->render);
row->render = NULL;
row->render = malloc(row->size + (tabs * (TAB_STOP-1)) + 1);
assert(row->render != NULL);
for (j = 0; j < row->size; j++) {
if (row->line[j] == '\t') {
do {
row->render[i++] = ' ';
} while ((i % TAB_STOP) != 0);
} else {
row->render[i++] = row->line[j];
}
}
row->render[i] = '\0';
row->rsize = i;
}
void
insert_row(int at, char *s, size_t len)
{
if (at < 0 || at > editor.nrows) {
return;
}
editor.row = realloc(editor.row, sizeof(erow) * (editor.nrows + 1));
assert(editor.row != NULL);
if (at < editor.nrows) {
memmove(&editor.row[at+1], &editor.row[at],
sizeof(erow) * (editor.nrows - at + 1));
}
editor.row[at].size = len;
editor.row[at].line = malloc(len+1);
memcpy(editor.row[at].line, s, len);
editor.row[at].line[len] = '\0';
editor.row[at].rsize = 0;
editor.row[at].render = NULL;
update_row(&editor.row[at]);
editor.nrows++;
}
void
free_row(erow *row)
{
free(row->render);
free(row->line);
row->render = NULL;
row->line = NULL;
}
void
delete_row(int at)
{
@ -243,29 +107,29 @@ delete_row(int at)
return;
}
free_row(&editor.row[at]);
erow_free(&editor.row[at]);
memmove(&editor.row[at], &editor.row[at+1],
sizeof(erow) * (editor.nrows - at - 1));
sizeof(struct erow) * (editor.nrows - at - 1));
editor.nrows--;
editor.dirty++;
}
void
row_append_row(erow *row, char *s, int len)
row_append_row(struct erow *row, char *s, int len)
{
row->line = realloc(row->line, row->size + len + 1);
assert(row->line != NULL);
memcpy(&row->line[row->size], s, len);
row->size += len;
row->line[row->size] = '\0';
update_row(row);
erow_update(row);
editor.dirty++;
}
void
row_insert_ch(erow *row, int at, int16_t c)
row_insert_ch(struct erow *row, int at, int16_t c)
{
/*
* row_insert_ch just concerns itself with how to update a row.
@ -280,19 +144,19 @@ row_insert_ch(erow *row, int at, int16_t c)
row->size++;
row->line[at] = c;
update_row(row);
erow_update(row);
}
void
row_delete_ch(erow *row, int at)
row_delete_ch(struct erow *row, int at)
{
if (at < 0 || at >= row->size) {
return;
}
memmove(&row->line[at], &row->line[at+1], row->size+1);
row->size--;
update_row(row);
erow_update(row);
editor.dirty++;
}
@ -306,7 +170,7 @@ insertch(int16_t c)
* at and what to do.
*/
if (editor.cury == editor.nrows) {
insert_row(editor.nrows, "", 0);
erow_insert(editor.nrows, "", 0);
}
row_insert_ch(&editor.row[editor.cury], editor.curx, c);
@ -318,7 +182,7 @@ insertch(int16_t c)
void
deletech()
{
erow *row = NULL;
struct erow *row = NULL;
if (editor.cury == editor.nrows) {
return;
@ -370,7 +234,7 @@ open_file(const char *filename)
linelen--;
}
insert_row(editor.nrows, line, linelen);
erow_insert(editor.nrows, line, linelen);
}
}
@ -609,7 +473,7 @@ editor_find_callback(char *query, int16_t c)
static int dir = 1;
int i, current;
char *match;
erow *row;
struct erow *row;
if (c == '\r' || c == ESC_KEY) {
/* reset search */
@ -643,7 +507,7 @@ editor_find_callback(char *query, int16_t c)
if (match) {
lmatch = current;
editor.cury = current;
editor.curx = row_render_to_cursor(row,
editor.curx = erow_render_to_cursor(row,
match - row->render);
/*
* after this, scroll will put the match line at
@ -685,10 +549,11 @@ editor_find()
void
move_cursor(int16_t c)
{
erow *row = (editor.cury >= editor.nrows) ?
NULL : &editor.row[editor.cury];
struct erow *row;
int reps;
row = (editor.cury >= editor.nrows) ? NULL : &editor.row[editor.cury];
switch (c) {
case ARROW_UP:
case CTRL_KEY('p'):
@ -762,18 +627,18 @@ move_cursor(int16_t c)
void
newline()
{
erow *row = NULL;
struct erow *row = NULL;
if (editor.curx == 0) {
insert_row(editor.cury, "", 0);
erow_insert(editor.cury, "", 0);
} else {
row = &editor.row[editor.cury];
insert_row(editor.cury + 1, &row->line[editor.curx],
erow_insert(editor.cury + 1, &row->line[editor.curx],
row->size - editor.curx);
row = &editor.row[editor.cury];
row->size = editor.curx;
row->line[row->size] = '\0';
update_row(row);
erow_update(row);
}
editor.cury++;
@ -1059,7 +924,7 @@ scroll()
{
editor.rx = 0;
if (editor.cury < editor.nrows) {
editor.rx = row_render_to_cursor(
editor.rx = erow_render_to_cursor(
&editor.row[editor.cury],
editor.curx);
}