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Split up the codebase into files, Fixes #8

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This commit is contained in:
Aaron Fischer 2018-10-19 13:24:58 +02:00
parent 45c0f51cb3
commit 228c992c84
16 changed files with 1014 additions and 830 deletions
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2
Makefile
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@ -1,5 +1,5 @@
kilo: fn.c terminal.c kilo: fn.c terminal.c
$(CC) fn.c terminal.c -o fn \ $(CC) fn.c terminal.c output.c row.c hl.c search.c file.c input.c -o fn \
-Wall \ -Wall \
-Wextra \ -Wextra \
-Wbad-function-cast \ -Wbad-function-cast \

79
file.c Normal file
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@ -0,0 +1,79 @@
#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#define _GNU_SOURCE
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include "fn.h"
#include "file.h"
#include "hl.h"
#include "terminal.h"
#include "row.h"
void editorOpen(char *filename) {
free(E.filename);
// TODO: Maybe replace strdup (string.h), becaus it is no strict posix c lib
E.filename = strdup(filename);
editorSelectSyntaxHighlight();
FILE *fp = fopen(filename, "r");
if (!fp) die("fopen");
char *line = NULL;
size_t linecap = 0;
ssize_t linelen;
while ((linelen = getline(&line, &linecap, fp)) != -1) {
while (linelen > 0 && (line[linelen - 1] == '\n' ||
line[linelen - 1] == '\r'))
linelen--;
editorInsertRow(E.numrows, line, linelen);
}
free(line);
fclose(fp);
E.dirty = 0;
}
void editorSave() {
if (E.filename == NULL) {
E.filename = editorPrompt("Save as: %s (ESC to cancel)", NULL);
if (E.filename == NULL) {
editorSetStatusMessage("Save aborted");
return;
}
}
int len;
char *buf = editorRowsToString(&len);
int fd = open(E.filename, O_RDWR | O_CREAT, 0644);
if (fd != -1) {
if (ftruncate(fd, len) != -1) {
if (write(fd, buf, len) == len) {
close(fd);
free(buf);
E.dirty = 0;
editorSetStatusMessage("%d bytes written to disk", len);
return;
}
editorSelectSyntaxHighlight();
}
close(fd);
}
free(buf);
editorSetStatusMessage("Can't save! I/O error: %s", strerror(errno));
}

8
file.h Normal file
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@ -0,0 +1,8 @@
#ifndef _FILE_H_
#define _FILE_H_
void editorOpen(char *filename);
void editorSave();
#endif

BIN
fn
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839
fn.c
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@ -1,5 +1,3 @@
/*** includes ***/
#define _DEFAULT_SOURCE #define _DEFAULT_SOURCE
#define _BSD_SOURCE #define _BSD_SOURCE
#define _GNU_SOURCE #define _GNU_SOURCE
@ -20,833 +18,16 @@
#include "fn.h" #include "fn.h"
#include "terminal.h" #include "terminal.h"
#include "output.h"
#include "row.h"
char *C_HL_extensions[] = { ".c", ".h", ".cpp", NULL }; #include "hl.h"
char *C_HL_keywords[] = { #include "search.h"
"switch", "if", "while", "for", "break", "continue", "return", "else", #include "file.h"
"struct", "union", "typedef", "static", "enum", "class", "case", #include "input.h"
"int|", "long|", "double|", "float|", "char|", "unsigned|", "signed|", // TODO: Put this somewhere else?
"void|", NULL void windowResizeCallback(int signum);
}; void initEditor();
struct editorSyntax HLDB[] = {
{
"c",
C_HL_extensions,
C_HL_keywords,
"//", "/*", "*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
};
#define HLDB_ENTRIES (sizeof(HLDB) / sizeof(HLDB[0]))
/*** syntax highlighting ***/
int is_separator(int c) {
return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[];", c) != NULL;
}
void editorUpdateSyntax(erow *row) {
row->hl = realloc(row->hl, row->rsize);
memset(row->hl, HL_NORMAL, row->rsize);
if (E.syntax == NULL) return;
char **keywords = E.syntax->keywords;
char *scs = E.syntax->singleline_comment_start;
char *mcs = E.syntax->multiline_comment_start;
char *mce = E.syntax->multiline_comment_end;
int scs_len = scs ? strlen(scs) : 0;
int mcs_len = mcs ? strlen(mcs) : 0;
int mce_len = mce ? strlen(mce) : 0;
int prev_sep = 1;
int in_string = 0;
int in_comment = (row->idx > 0 && E.row[row->idx-1].hl_open_comment);
int i = 0;
while (i < row->rsize) {
char c = row->render[i];
unsigned char prev_hl = (i > 0) ? row->hl[i -1] : HL_NORMAL;
// Comments
if (scs_len && !in_string && !in_comment) {
if (!strncmp(&row->render[i], scs, scs_len)) {
memset(&row->hl[i], HL_COMMENT, row->rsize - i);
break;
}
}
// Multi line comments
if (mcs_len && mce_len && !in_string) {
if (in_comment) {
row->hl[i] = HL_MLCOMMENT;
if (!strncmp(&row->render[i], mce, mce_len)) {
memset(&row->hl[i], HL_MLCOMMENT, mce_len);
i += mce_len;
in_comment = 0;
prev_sep = 1;
continue;
} else {
i++;
continue;
}
} else if (!strncmp(&row->render[i], mcs, mcs_len)) {
memset(&row->hl[i], HL_MLCOMMENT, mcs_len);
i += mcs_len;
in_comment = 1;
continue;
}
}
// Strings
if (E.syntax->flags & HL_HIGHLIGHT_NUMBERS) {
if (in_string) {
row->hl[i] = HL_STRING;
if (c == '\\' && i + 1 < row->rsize) {
row->hl[i + 1] = HL_STRING;
i += 2;
continue;
}
if (c == in_string) in_string = 0;
i++;
prev_sep = 1;
continue;
} else {
if (c == '"' || c == '\'') {
in_string = c;
row->hl[i] = HL_STRING;
i++;
continue;
}
}
}
// Numbers
if (E.syntax->flags & HL_HIGHLIGHT_NUMBERS) {
if ((isdigit(c) && (prev_sep || prev_hl == HL_NUMBER)) ||
(c == '.' && prev_hl == HL_NUMBER)) {
row->hl[i] = HL_NUMBER;
i++;
prev_sep = 0;
continue;
}
}
// Keywords
if (prev_sep) {
int j;
for (j=0; keywords[j]; j++) {
int klen = strlen(keywords[j]);
int kw2 = keywords[j][klen - 1] == '|';
if (kw2) klen--;
if (!strncmp(&row->render[i], keywords[j], klen) &&
is_separator(row->render[i + klen])) {
memset(&row->hl[i], kw2 ? HL_KEYWORD2 : HL_KEYWORD1, klen);
i += klen;
break;
}
}
if (keywords[j] != NULL) {
prev_sep = 0;
continue;
}
}
prev_sep = is_separator(c);
i++;
}
int changed = (row->hl_open_comment != in_comment);
row->hl_open_comment = in_comment;
if (changed && row->idx+1 < E.numrows) {
editorUpdateSyntax(&E.row[row->idx+1]);
}
}
int editorSyntaxToColor(int hl) {
switch (hl) {
case HL_COMMENT:
case HL_MLCOMMENT: return 36;
case HL_KEYWORD1: return 33;
case HL_KEYWORD2: return 32;
case HL_STRING: return 35;
case HL_NUMBER: return 31;
case HL_MATCH: return 34;
default: return 37;
}
}
void editorSelectSyntaxHighlight() {
E.syntax = NULL;
if (E.filename == NULL) return;
char *ext = strrchr(E.filename, '.');
for (unsigned int j=0; j<HLDB_ENTRIES; j++) {
struct editorSyntax *s = &HLDB[j];
unsigned int i = 0;
while (s->filematch[i]) {
int is_ext = (s->filematch[i][0] == '.');
if ((is_ext && ext && !strcmp(ext, s->filematch[i])) ||
(!is_ext && strstr(E.filename, s->filematch[i]))) {
E.syntax = s;
int filerow;
for (filerow=0; filerow<E.numrows; filerow++) {
editorUpdateSyntax(&E.row[filerow]);
}
return;
}
i++;
}
}
}
/*** row operations ***/
int editorRowCxToRx(erow *row, int cx) {
int rx = 0;
int j;
for (j=0; j<cx; j++) {
if (row->chars[j] == '\t') {
rx += (FN_TAB_STOP - 1) - (rx % FN_TAB_STOP);
}
rx++;
}
return rx;
}
int editorRowRxToCx(erow *row, int rx) {
int cur_rx = 0;
int cx;
for (cx=0; cx < row->size; cx++) {
if (row->chars[cx] == '\t')
cur_rx += (FN_TAB_STOP - 1) - (cur_rx % FN_TAB_STOP);
cur_rx++;
if (cur_rx > rx) return cx;
}
return cx;
}
void editorUpdateRow(erow *row) {
int tabs = 0;
int j;
for (j=0; j<row->size; j++) {
if (row->chars[j] == '\t') tabs++;
}
free(row->render);
row->render = malloc(row->size + tabs*(FN_TAB_STOP - 1) + 1);
int idx = 0;
for (j=0; j<row->size; j++) {
if (row->chars[j] == '\t') {
row->render[idx++] = ' ';
while (idx % FN_TAB_STOP != 0) row->render[idx++] = ' ';
} else {
row->render[idx++] = row->chars[j];
}
}
row->render[idx] = '\0';
row->rsize = idx;
editorUpdateSyntax(row);
}
void editorInsertRow(int at, char *s, size_t len) {
if (at < 0 || at > E.numrows) return;
E.row = realloc(E.row, sizeof(erow) * (E.numrows +1));
memmove(&E.row[at + 1], &E.row[at], sizeof(erow) * (E.numrows - at));
for (int j=at+1; j<= E.numrows; j++) E.row[j].idx++;
E.row[at].idx = at;
E.row[at].size = len;
E.row[at].chars = malloc(len + 1);
memcpy(E.row[at].chars, s, len);
E.row[at].chars[len] = '\0';
E.row[at].rsize = 0;
E.row[at].render = NULL;
E.row[at].hl = NULL;
E.row[at].hl_open_comment = 0;
editorUpdateRow(&E.row[at]);
E.numrows++;
E.dirty++;
}
void editorFreeRow(erow *row) {
free(row->render);
free(row->chars);
free(row->hl);
}
void editorDelRow(int at) {
if (at < 0 || at >= E.numrows) return;
editorFreeRow(&E.row[at]);
memmove(&E.row[at], &E.row[at + 1], sizeof(erow) * (E.numrows - at -1));
for (int j=at; j<= E.numrows-1; j++) E.row[j].idx--;
E.numrows--;
E.dirty++;
}
void editorRowInsertChar(erow *row, int at, int c) {
if (at < 0 || at > row->size) at = row->size;
row->chars = realloc(row->chars, row->size + 2);
memmove(&row->chars[at + 1], &row->chars[at], row->size - at + 1);
row->size++;
row->chars[at] = c;
editorUpdateRow(row);
E.dirty++;
}
void editorRowAppendString(erow *row, char *s, size_t len) {
row->chars = realloc(row->chars, row->size + len + 1);
memcpy(&row->chars[row->size], s, len);
row->size += len;
row->chars[row->size] = '\0';
editorUpdateRow(row);
E.dirty++;
}
void editorRowDelChar(erow *row, int at) {
if (at < 0 || at >= row->size) return;
memmove(&row->chars[at], &row->chars[at + 1], row->size - at);
row->size--;
editorUpdateRow(row);
E.dirty++;
}
/*** editor operations ***/
void editorInsertChar(int c) {
if (E.cy == E.numrows) {
editorInsertRow(E.numrows, "", 0);
}
editorRowInsertChar(&E.row[E.cy], E.cx, c);
E.cx++;
}
void editorInsertNewLine() {
if (E.cx == 0) {
editorInsertRow(E.cy, "", 0);
} else {
erow *row = &E.row[E.cy];
editorInsertRow(E.cy + 1, &row->chars[E.cx], row->size - E.cx);
row = &E.row[E.cy];
row->size = E.cx;
row->chars[row->size] = '\0';
editorUpdateRow(row);
}
E.cy++;
E.cx = 0;
}
void editorDelChar() {
if (E.cy == E.numrows) return;
if (E.cx == 0 && E.cy == 0) return;
erow *row = &E.row[E.cy];
if (E.cx > 0) {
editorRowDelChar(row, E.cx - 1);
E.cx--;
} else {
E.cx = E.row[E.cy - 1].size;
editorRowAppendString(&E.row[E.cy - 1], row->chars, row->size);
editorDelRow(E.cy);
E.cy--;
}
}
/*** file i/o ***/
char *editorRowsToString(int *buflen) {
int totlen = 0;
int j;
for (j=0; j<E.numrows; j++) {
totlen += E.row[j].size + 1;
}
*buflen = totlen;
char *buf = malloc(totlen);
char *p = buf;
for (j=0; j<E.numrows; j++) {
memcpy(p, E.row[j].chars, E.row[j].size);
p += E.row[j].size;
*p = '\n';
p++;
}
return buf;
}
void editorOpen(char *filename) {
free(E.filename);
E.filename = strdup(filename);
editorSelectSyntaxHighlight();
FILE *fp = fopen(filename, "r");
if (!fp) die("fopen");
char *line = NULL;
size_t linecap = 0;
ssize_t linelen;
while ((linelen = getline(&line, &linecap, fp)) != -1) {
while (linelen > 0 && (line[linelen - 1] == '\n' ||
line[linelen - 1] == '\r'))
linelen--;
editorInsertRow(E.numrows, line, linelen);
}
free(line);
fclose(fp);
E.dirty = 0;
}
void editorSave() {
if (E.filename == NULL) {
E.filename = editorPrompt("Save as: %s (ESC to cancel)", NULL);
if (E.filename == NULL) {
editorSetStatusMessage("Save aborted");
return;
}
}
int len;
char *buf = editorRowsToString(&len);
int fd = open(E.filename, O_RDWR | O_CREAT, 0644);
if (fd != -1) {
if (ftruncate(fd, len) != -1) {
if (write(fd, buf, len) == len) {
close(fd);
free(buf);
E.dirty = 0;
editorSetStatusMessage("%d bytes written to disk", len);
return;
}
editorSelectSyntaxHighlight();
}
close(fd);
}
free(buf);
editorSetStatusMessage("Can't save! I/O error: %s", strerror(errno));
}
/** find **/
void editorFindCallback(char *query, int key) {
static int last_match = -1;
static int direction = 1;
static int saved_hl_line;
static char *saved_hl = NULL;
if (saved_hl) {
memcpy(E.row[saved_hl_line].hl, saved_hl, E.row[saved_hl_line].rsize);
free(saved_hl);
saved_hl = NULL;
}
if (key == '\r' || key == '\xb') {
last_match = -1;
direction = 1;
return;
} else if (key == ARROW_RIGHT || key == ARROW_DOWN) {
direction = 1;
} else if (key == ARROW_LEFT || key == ARROW_UP) {
direction = -1;
} else {
last_match = -1;
direction = 1;
}
if (last_match == -1) direction = 1;
int current = last_match;
int i;
for (i=0; i < E.numrows; i++) {
current += direction;
if (current == -1) current = E.numrows -1;
else if (current == E.numrows) current = 0;
erow *row = &E.row[current];
char *match = strstr(row->render, query);
if (match) {
last_match = current;
E.cy = current;
E.cx = editorRowRxToCx(row, match - row->render); // Substract pointers here
E.rowoff = E.numrows;
saved_hl_line = current;
saved_hl = malloc(row->rsize);
memcpy(saved_hl, row->hl, row->rsize);
memset(&row->hl[match - row->render], HL_MATCH, strlen(query));
break;
}
}
}
void editorFind() {
int saved_cx = E.cx;
int saved_cy = E.cy;
int saved_coloff = E.coloff;
int saved_rowoff = E.rowoff;
char *query = editorPrompt("Search: %s (Use ESC/Arrows/Enter)", editorFindCallback);
if (query) {
free(query);
} else {
E.cx = saved_cx;
E.cy = saved_cy;
E.coloff = saved_coloff;
E.rowoff = saved_rowoff;
}
}
/*** append buffer ***/
struct abuf {
char *b;
int len;
};
#define ABUF_INIT {NULL, 0}
void abAppend(struct abuf *ab, const char *s, int len) {
char *new = realloc(ab->b, ab->len + len);
if (new == NULL) return;
memcpy(&new[ab->len], s, len);
ab->b = new;
ab->len += len;
}
void abFree(struct abuf *ab) {
free(ab->b);
}
/*** output ***/
void editorScroll() {
E.rx = 0;
if (E.cy < E.numrows) {
E.rx = editorRowCxToRx(&E.row[E.cy], E.cx);
}
if (E.cy < E.rowoff) {
E.rowoff = E.cy;
}
if (E.cy >= E.rowoff + E.screenrows) {
E.rowoff = E.cy - E.screenrows + 1;
}
if (E.rx < E.coloff) {
E.coloff = E.rx;
}
if (E.rx >= E.coloff + E.screencols) {
E.coloff = E.rx - E.screencols + 1;
}
}
void editorDrawRows(struct abuf *ab) {
int y;
for (y = 0; y < E.screenrows; y++) {
int filerow = y + E.rowoff;
if (filerow >= E.numrows) {
if (E.numrows == 0 && y == E.screenrows / 3) {
char welcome[80];
int welcomelen = snprintf(welcome, sizeof(welcome),
"FuNote v%s", FN_VERSION);
if (welcomelen > E.screencols) welcomelen = E.screencols;
int padding = (E.screencols - welcomelen) / 2;
if (padding) {
abAppend(ab, "~", 1);
padding--;
}
while(padding--) abAppend(ab, " ", 1);
abAppend(ab, welcome, welcomelen);
} else {
abAppend(ab, "~", 1);
}
} else {
int len = E.row[filerow].rsize - E.coloff;
if (len < 0) len = 0;
if (len > E.screencols) len = E.screencols;
char *c = &E.row[filerow].render[E.coloff];
unsigned char *hl = &E.row[filerow].hl[E.coloff];
int current_color = -1;
int j;
for (j=0; j<len; j++) {
if (iscntrl(c[j])) {
char sym = (c[j] <= 26) ? '@' + c[j] : '?';
abAppend(ab, "\x1b[7m", 4);
abAppend(ab, &sym, 1);
abAppend(ab, "\x1b[m", 3);
if (current_color != -1) {
char buf[16];
int clen = snprintf(buf, sizeof(buf), "\x1b[%dm", current_color);
abAppend(ab, buf, clen);
}
} else if (hl[j] == HL_NORMAL) {
if (current_color != -1) {
abAppend(ab, "\x1b[39m", 5);
current_color = -1;
}
abAppend(ab, &c[j], 1);
} else {
int color = editorSyntaxToColor(hl[j]);
if (color != current_color) {
current_color = color;
char buf[16];
int clen = snprintf(buf, sizeof(buf), "\x1b[%dm", color);
abAppend(ab, buf, clen);
}
abAppend(ab, &c[j], 1);
}
}
abAppend(ab, "\x1b[39m", 5);
}
abAppend(ab, "\x1b[K", 3); // Erase one line
abAppend(ab, "\r\n", 2);
}
}
void editorDrawStatusBar(struct abuf *ab) {
abAppend(ab, "\x1b[7m", 4);
char status[80], rstatus[80];
int len = snprintf(status, sizeof(status), "%.20s%s",
E.filename ? E.filename : "[No Name]",
E.dirty ? "*" : "");
int rlen = snprintf(rstatus, sizeof(rstatus), "%s | %d/%d",
E.syntax ? E.syntax->filetype : "no ft", E.cy + 1, E.numrows);
if (len > E.screencols) len = E.screencols;
abAppend(ab, status, len);
while (len < E.screencols) {
if (E.screencols - len == rlen) {
abAppend(ab, rstatus, rlen);
break;
} else {
abAppend(ab, " ", 1);
len++;
}
}
abAppend(ab, "\x1b[m", 3);
abAppend(ab, "\r\n", 2);
}
void editorDrawMessageBar(struct abuf *ab) {
abAppend(ab, "\x1b[K", 3);
int msglen = strlen(E.statusmsg);
if (msglen > E.screencols) msglen = E.screencols;
if (msglen && time(NULL) - E.statusmsg_time < 5)
abAppend(ab, E.statusmsg, msglen);
}
void editorRefreshScreen() {
editorScroll();
struct abuf ab = ABUF_INIT;
abAppend(&ab, "\x1b[?25l", 6); // Hide cursor
abAppend(&ab, "\x1b[H", 3); // CUP (cursor position)
editorDrawRows(&ab);
editorDrawStatusBar(&ab);
editorDrawMessageBar(&ab);
// Update cursor position
char buf[32];
snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (E.cy - E.rowoff) + 1, (E.rx - E.coloff) + 1);
abAppend(&ab, buf, strlen(buf));
abAppend(&ab, "\x1b[?25h", 6); // Show cursor
write(STDOUT_FILENO, ab.b, ab.len);
abFree(&ab);
}
void editorSetStatusMessage(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vsnprintf(E.statusmsg, sizeof(E.statusmsg), fmt, ap);
va_end(ap);
E.statusmsg_time = time(NULL);
}
/*** input ***/
char *editorPrompt(char *prompt, void (*callback)(char *, int)) {
size_t bufsize = 128;
char *buf = malloc(bufsize);
size_t buflen = 0;
buf[0] = '\0';
while (1) {
editorSetStatusMessage(prompt, buf);
editorRefreshScreen();
int c = editorReadKey();
if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
if (buflen != 0) buf[--buflen] = '\0';
} else if (c == '\x1b') {
editorSetStatusMessage("");
if (callback) callback(buf, c);
free(buf);
return NULL;
} else if (c == '\r') {
if (buflen != 0) {
editorSetStatusMessage("");
if (callback) callback(buf, c);
return buf;
}
} else if (!iscntrl(c) && c < 128) {
if (buflen == bufsize -1) {
bufsize *= 2;
buf = realloc(buf, bufsize);
}
buf[buflen++] = c;
buf[buflen] = '\0';
}
if (callback) callback(buf, c);
}
}
void editorMoveCursor(int key) {
erow *row = (E.cy >= E.numrows) ? NULL : &E.row[E.cy];
switch (key) {
case ARROW_LEFT:
if (E.cx != 0) {
E.cx--;
} else if (E.cy > 0) {
E.cy--;
E.cx = E.row[E.cy].size;
}
break;
case ARROW_RIGHT:
if (row && E.cx < row->size) {
E.cx++;
} else if (row && E.cx == row->size) {
E.cy++;
E.cx = 0;
}
break;
case ARROW_UP:
if (E.cy != 0) {
E.cy--;
}
break;
case ARROW_DOWN:
if (E.cy < E.numrows) {
E.cy++;
}
break;
}
row = (E.cy >= E.numrows) ? NULL : &E.row[E.cy];
int rowlen = row ? row->size : 0;
if (E.cx > rowlen) {
E.cx = rowlen;
}
}
void editorProcessKeypress() {
static int quit_times = FN_QUIT_TIMES;
int c = editorReadKey(); // Blocking!
switch (c) {
case '\r':
editorInsertNewLine();
break;
case CTRL_KEY('q'):
if (E.dirty && quit_times > 0) {
editorSetStatusMessage("WARNING!!! File has unsaved changes. "
"Press CTRL-Q %d more times to quit.", quit_times);
quit_times--;
return;
}
write(STDOUT_FILENO, "\x1b[2J", 4);
write(STDOUT_FILENO, "\x1b[H", 3);
exit(0);
break;
case CTRL_KEY('s'):
editorSave();
break;
case HOME_KEY:
E.cx = 0;
break;
case END_KEY:
if (E.cy < E.numrows) {
E.cx = E.row[E.cy].size;
}
break;
case CTRL_KEY('f'):
editorFind();
break;
case BACKSPACE:
case CTRL_KEY('h'):
case DEL_KEY:
if (c == DEL_KEY) editorMoveCursor(ARROW_RIGHT);
editorDelChar();
break;
case PAGE_UP:
case PAGE_DOWN:
{
if (c == PAGE_UP) {
E.cy = E.rowoff;
} else if (c == PAGE_DOWN) {
E.cy = E.rowoff + E.screenrows - 1;
if (E.cy > E.numrows) E.cy = E.numrows;
}
int times = E.screenrows;
while(times--)
editorMoveCursor(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
}
break;
case ARROW_UP:
case ARROW_DOWN:
case ARROW_LEFT:
case ARROW_RIGHT:
editorMoveCursor(c);
break;
case CTRL_KEY('l'):
case '\x1b':
break;
default:
editorInsertChar(c);
break;
}
quit_times = FN_QUIT_TIMES;
}
/*** init ***/
void windowResizeCallback(int signum) { void windowResizeCallback(int signum) {
if (signum != SIGWINCH) { if (signum != SIGWINCH) {

5
fn.h
View file

@ -76,6 +76,11 @@ struct editorConfig {
struct editorConfig E; struct editorConfig E;
struct abuf {
char *b;
int len;
};
/*** filetypes ***/ /*** filetypes ***/

202
hl.c Normal file
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@ -0,0 +1,202 @@
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include "fn.h"
#include "hl.h"
char *C_HL_extensions[] = { ".c", ".h", ".cpp", NULL };
char *C_HL_keywords[] = {
"switch", "if", "while", "for", "break", "continue", "return", "else",
"struct", "union", "typedef", "static", "enum", "class", "case",
"int|", "long|", "double|", "float|", "char|", "unsigned|", "signed|",
"void|", NULL
};
struct editorSyntax HLDB[] = {
{
"c",
C_HL_extensions,
C_HL_keywords,
"//", "/*", "*/",
HL_HIGHLIGHT_NUMBERS | HL_HIGHLIGHT_STRINGS
},
};
#define HLDB_ENTRIES (sizeof(HLDB) / sizeof(HLDB[0]))
int is_separator(int c) {
return isspace(c) || c == '\0' || strchr(",.()+-/*=~%<>[];", c) != NULL;
}
void editorUpdateSyntax(erow *row) {
row->hl = realloc(row->hl, row->rsize);
memset(row->hl, HL_NORMAL, row->rsize);
if (E.syntax == NULL) return;
char **keywords = E.syntax->keywords;
char *scs = E.syntax->singleline_comment_start;
char *mcs = E.syntax->multiline_comment_start;
char *mce = E.syntax->multiline_comment_end;
int scs_len = scs ? strlen(scs) : 0;
int mcs_len = mcs ? strlen(mcs) : 0;
int mce_len = mce ? strlen(mce) : 0;
int prev_sep = 1;
int in_string = 0;
int in_comment = (row->idx > 0 && E.row[row->idx-1].hl_open_comment);
int i = 0;
while (i < row->rsize) {
char c = row->render[i];
unsigned char prev_hl = (i > 0) ? row->hl[i -1] : HL_NORMAL;
// Comments
if (scs_len && !in_string && !in_comment) {
if (!strncmp(&row->render[i], scs, scs_len)) {
memset(&row->hl[i], HL_COMMENT, row->rsize - i);
break;
}
}
// Multi line comments
if (mcs_len && mce_len && !in_string) {
if (in_comment) {
row->hl[i] = HL_MLCOMMENT;
if (!strncmp(&row->render[i], mce, mce_len)) {
memset(&row->hl[i], HL_MLCOMMENT, mce_len);
i += mce_len;
in_comment = 0;
prev_sep = 1;
continue;
} else {
i++;
continue;
}
} else if (!strncmp(&row->render[i], mcs, mcs_len)) {
memset(&row->hl[i], HL_MLCOMMENT, mcs_len);
i += mcs_len;
in_comment = 1;
continue;
}
}
// Strings
if (E.syntax->flags & HL_HIGHLIGHT_NUMBERS) {
if (in_string) {
row->hl[i] = HL_STRING;
if (c == '\\' && i + 1 < row->rsize) {
row->hl[i + 1] = HL_STRING;
i += 2;
continue;
}
if (c == in_string) in_string = 0;
i++;
prev_sep = 1;
continue;
} else {
if (c == '"' || c == '\'') {
in_string = c;
row->hl[i] = HL_STRING;
i++;
continue;
}
}
}
// Numbers
if (E.syntax->flags & HL_HIGHLIGHT_NUMBERS) {
if ((isdigit(c) && (prev_sep || prev_hl == HL_NUMBER)) ||
(c == '.' && prev_hl == HL_NUMBER)) {
row->hl[i] = HL_NUMBER;
i++;
prev_sep = 0;
continue;
}
}
// Keywords
if (prev_sep) {
int j;
for (j=0; keywords[j]; j++) {
int klen = strlen(keywords[j]);
int kw2 = keywords[j][klen - 1] == '|';
if (kw2) klen--;
if (!strncmp(&row->render[i], keywords[j], klen) &&
is_separator(row->render[i + klen])) {
memset(&row->hl[i], kw2 ? HL_KEYWORD2 : HL_KEYWORD1, klen);
i += klen;
break;
}
}
if (keywords[j] != NULL) {
prev_sep = 0;
continue;
}
}
prev_sep = is_separator(c);
i++;
}
int changed = (row->hl_open_comment != in_comment);
row->hl_open_comment = in_comment;
if (changed && row->idx+1 < E.numrows) {
editorUpdateSyntax(&E.row[row->idx+1]);
}
}
int editorSyntaxToColor(int hl) {
switch (hl) {
case HL_COMMENT:
case HL_MLCOMMENT: return 36;
case HL_KEYWORD1: return 33;
case HL_KEYWORD2: return 32;
case HL_STRING: return 35;
case HL_NUMBER: return 31;
case HL_MATCH: return 34;
default: return 37;
}
}
void editorSelectSyntaxHighlight() {
E.syntax = NULL;
if (E.filename == NULL) return;
char *ext = strrchr(E.filename, '.');
for (unsigned int j=0; j<HLDB_ENTRIES; j++) {
struct editorSyntax *s = &HLDB[j];
unsigned int i = 0;
while (s->filematch[i]) {
int is_ext = (s->filematch[i][0] == '.');
if ((is_ext && ext && !strcmp(ext, s->filematch[i])) ||
(!is_ext && strstr(E.filename, s->filematch[i]))) {
E.syntax = s;
int filerow;
for (filerow=0; filerow<E.numrows; filerow++) {
editorUpdateSyntax(&E.row[filerow]);
}
return;
}
i++;
}
}
}

10
hl.h Normal file
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@ -0,0 +1,10 @@
#ifndef _HL_H
#define _HL_H
int is_separator(int c);
void editorUpdateSyntax(erow *row);
int editorSyntaxToColor(int hl);
void editorSelectSyntaxHighlight();
#endif

180
input.c Normal file
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#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include "fn.h"
#include "row.h"
#include "terminal.h"
#include "input.h"
#include "output.h"
#include "file.h"
#include "search.h"
char *editorPrompt(char *prompt, void (*callback)(char *, int)) {
size_t bufsize = 128;
char *buf = malloc(bufsize);
size_t buflen = 0;
buf[0] = '\0';
while (1) {
editorSetStatusMessage(prompt, buf);
editorRefreshScreen();
int c = editorReadKey();
if (c == DEL_KEY || c == CTRL_KEY('h') || c == BACKSPACE) {
if (buflen != 0) buf[--buflen] = '\0';
} else if (c == '\x1b') {
editorSetStatusMessage("");
if (callback) callback(buf, c);
free(buf);
return NULL;
} else if (c == '\r') {
if (buflen != 0) {
editorSetStatusMessage("");
if (callback) callback(buf, c);
return buf;
}
} else if (!iscntrl(c) && c < 128) {
if (buflen == bufsize -1) {
bufsize *= 2;
buf = realloc(buf, bufsize);
}
buf[buflen++] = c;
buf[buflen] = '\0';
}
if (callback) callback(buf, c);
}
}
void editorMoveCursor(int key) {
erow *row = (E.cy >= E.numrows) ? NULL : &E.row[E.cy];
switch (key) {
case ARROW_LEFT:
if (E.cx != 0) {
E.cx--;
} else if (E.cy > 0) {
E.cy--;
E.cx = E.row[E.cy].size;
}
break;
case ARROW_RIGHT:
if (row && E.cx < row->size) {
E.cx++;
} else if (row && E.cx == row->size) {
E.cy++;
E.cx = 0;
}
break;
case ARROW_UP:
if (E.cy != 0) {
E.cy--;
}
break;
case ARROW_DOWN:
if (E.cy < E.numrows) {
E.cy++;
}
break;
}
row = (E.cy >= E.numrows) ? NULL : &E.row[E.cy];
int rowlen = row ? row->size : 0;
if (E.cx > rowlen) {
E.cx = rowlen;
}
}
void editorProcessKeypress() {
static int quit_times = FN_QUIT_TIMES;
int c = editorReadKey(); // Blocking!
switch (c) {
case '\r':
editorInsertNewLine();
break;
case CTRL_KEY('q'):
if (E.dirty && quit_times > 0) {
editorSetStatusMessage("WARNING!!! File has unsaved changes. "
"Press CTRL-Q %d more times to quit.", quit_times);
quit_times--;
return;
}
write(STDOUT_FILENO, "\x1b[2J", 4);
write(STDOUT_FILENO, "\x1b[H", 3);
exit(0);
break;
case CTRL_KEY('s'):
editorSave();
break;
case HOME_KEY:
E.cx = 0;
break;
case END_KEY:
if (E.cy < E.numrows) {
E.cx = E.row[E.cy].size;
}
break;
case CTRL_KEY('f'):
editorFind();
break;
case BACKSPACE:
case CTRL_KEY('h'):
case DEL_KEY:
if (c == DEL_KEY) editorMoveCursor(ARROW_RIGHT);
editorDelChar();
break;
case PAGE_UP:
case PAGE_DOWN:
{
if (c == PAGE_UP) {
E.cy = E.rowoff;
} else if (c == PAGE_DOWN) {
E.cy = E.rowoff + E.screenrows - 1;
if (E.cy > E.numrows) E.cy = E.numrows;
}
int times = E.screenrows;
while(times--)
editorMoveCursor(c == PAGE_UP ? ARROW_UP : ARROW_DOWN);
}
break;
case ARROW_UP:
case ARROW_DOWN:
case ARROW_LEFT:
case ARROW_RIGHT:
editorMoveCursor(c);
break;
case CTRL_KEY('l'):
case '\x1b':
break;
default:
editorInsertChar(c);
break;
}
quit_times = FN_QUIT_TIMES;
}

9
input.h Normal file
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@ -0,0 +1,9 @@
#ifndef _INPUT_H_
#define _INPUT_H_
char *editorPrompt(char *prompt, void (*callback)(char *, int));
void editorMoveCursor(int key);
void editorProcessKeypress();
#endif

207
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@ -0,0 +1,207 @@
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include "fn.h"
#include "row.h"
#include "hl.h"
#include "output.h"
void editorScroll() {
E.rx = 0;
if (E.cy < E.numrows) {
E.rx = editorRowCxToRx(&E.row[E.cy], E.cx);
}
if (E.cy < E.rowoff) {
E.rowoff = E.cy;
}
if (E.cy >= E.rowoff + E.screenrows) {
E.rowoff = E.cy - E.screenrows + 1;
}
if (E.rx < E.coloff) {
E.coloff = E.rx;
}
if (E.rx >= E.coloff + E.screencols) {
E.coloff = E.rx - E.screencols + 1;
}
}
void editorDrawRows(struct abuf *ab) {
int y;
for (y = 0; y < E.screenrows; y++) {
int filerow = y + E.rowoff;
if (filerow >= E.numrows) {
if (E.numrows == 0 && y == E.screenrows / 3) {
char welcome[80];
int welcomelen = snprintf(welcome, sizeof(welcome),
"FuNote v%s", FN_VERSION);
if (welcomelen > E.screencols) welcomelen = E.screencols;
int padding = (E.screencols - welcomelen) / 2;
if (padding) {
abAppend(ab, "~", 1);
padding--;
}
while(padding--) abAppend(ab, " ", 1);
abAppend(ab, welcome, welcomelen);
} else {
abAppend(ab, "~", 1);
}
} else {
int len = E.row[filerow].rsize - E.coloff;
if (len < 0) len = 0;
if (len > E.screencols) len = E.screencols;
char *c = &E.row[filerow].render[E.coloff];
unsigned char *hl = &E.row[filerow].hl[E.coloff];
int current_color = -1;
int j;
for (j=0; j<len; j++) {
if (iscntrl(c[j])) {
char sym = (c[j] <= 26) ? '@' + c[j] : '?';
abAppend(ab, "\x1b[7m", 4);
abAppend(ab, &sym, 1);
abAppend(ab, "\x1b[m", 3);
if (current_color != -1) {
char buf[16];
int clen = snprintf(buf, sizeof(buf), "\x1b[%dm", current_color);
abAppend(ab, buf, clen);
}
} else if (hl[j] == HL_NORMAL) {
if (current_color != -1) {
abAppend(ab, "\x1b[39m", 5);
current_color = -1;
}
abAppend(ab, &c[j], 1);
} else {
int color = editorSyntaxToColor(hl[j]);
if (color != current_color) {
current_color = color;
char buf[16];
int clen = snprintf(buf, sizeof(buf), "\x1b[%dm", color);
abAppend(ab, buf, clen);
}
abAppend(ab, &c[j], 1);
}
}
abAppend(ab, "\x1b[39m", 5);
}
abAppend(ab, "\x1b[K", 3); // Erase one line
abAppend(ab, "\r\n", 2);
}
}
void editorDrawStatusBar(struct abuf *ab) {
abAppend(ab, "\x1b[7m", 4);
char status[80], rstatus[80];
int len = snprintf(status, sizeof(status), "%.20s%s",
E.filename ? E.filename : "[No Name]",
E.dirty ? "*" : "");
int rlen = snprintf(rstatus, sizeof(rstatus), "%s | %d/%d",
E.syntax ? E.syntax->filetype : "no ft", E.cy + 1, E.numrows);
if (len > E.screencols) len = E.screencols;
abAppend(ab, status, len);
while (len < E.screencols) {
if (E.screencols - len == rlen) {
abAppend(ab, rstatus, rlen);
break;
} else {
abAppend(ab, " ", 1);
len++;
}
}
abAppend(ab, "\x1b[m", 3);
abAppend(ab, "\r\n", 2);
}
void editorDrawMessageBar(struct abuf *ab) {
abAppend(ab, "\x1b[K", 3);
int msglen = strlen(E.statusmsg);
if (msglen > E.screencols) msglen = E.screencols;
if (msglen && time(NULL) - E.statusmsg_time < 5)
abAppend(ab, E.statusmsg, msglen);
}
void editorRefreshScreen() {
editorScroll();
struct abuf ab = ABUF_INIT;
abAppend(&ab, "\x1b[?25l", 6); // Hide cursor
abAppend(&ab, "\x1b[H", 3); // CUP (cursor position)
editorDrawRows(&ab);
editorDrawStatusBar(&ab);
editorDrawMessageBar(&ab);
// Update cursor position
char buf[32];
snprintf(buf, sizeof(buf), "\x1b[%d;%dH", (E.cy - E.rowoff) + 1, (E.rx - E.coloff) + 1);
abAppend(&ab, buf, strlen(buf));
abAppend(&ab, "\x1b[?25h", 6); // Show cursor
write(STDOUT_FILENO, ab.b, ab.len);
abFree(&ab);
}
void editorSetStatusMessage(const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
vsnprintf(E.statusmsg, sizeof(E.statusmsg), fmt, ap);
va_end(ap);
E.statusmsg_time = time(NULL);
}
// Line oriented actions
void editorInsertChar(int c) {
if (E.cy == E.numrows) {
editorInsertRow(E.numrows, "", 0);
}
editorRowInsertChar(&E.row[E.cy], E.cx, c);
E.cx++;
}
void editorInsertNewLine() {
if (E.cx == 0) {
editorInsertRow(E.cy, "", 0);
} else {
erow *row = &E.row[E.cy];
editorInsertRow(E.cy + 1, &row->chars[E.cx], row->size - E.cx);
row = &E.row[E.cy];
row->size = E.cx;
row->chars[row->size] = '\0';
editorUpdateRow(row);
}
E.cy++;
E.cx = 0;
}
void editorDelChar() {
if (E.cy == E.numrows) return;
if (E.cx == 0 && E.cy == 0) return;
erow *row = &E.row[E.cy];
if (E.cx > 0) {
editorRowDelChar(row, E.cx - 1);
E.cx--;
} else {
E.cx = E.row[E.cy - 1].size;
editorRowAppendString(&E.row[E.cy - 1], row->chars, row->size);
editorDelRow(E.cy);
E.cy--;
}
}

20
output.h Normal file
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@ -0,0 +1,20 @@
#ifndef _OUTPUT_H
#define _OUTPUT_H
void editorScroll();
void editorDrawRows(struct abuf *ab);
void editorDrawStatusBar(struct abuf *ab);
void editorDrawMessageBar(struct abuf *ab);
void editorRefreshScreen();
void editorSetStatusMessage(const char *fmt, ...);
// Line oriented actions
void editorInsertChar(int c);
void editorInsertNewLine();
void editorDelChar();
#endif

165
row.c Normal file
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@ -0,0 +1,165 @@
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include "fn.h"
#include "hl.h"
#include "row.h"
void abAppend(struct abuf *ab, const char *s, int len) {
char *new = realloc(ab->b, ab->len + len);
if (new == NULL) return;
memcpy(&new[ab->len], s, len);
ab->b = new;
ab->len += len;
}
void abFree(struct abuf *ab) {
free(ab->b);
}
char *editorRowsToString(int *buflen) {
int totlen = 0;
int j;
for (j=0; j<E.numrows; j++) {
totlen += E.row[j].size + 1;
}
*buflen = totlen;
char *buf = malloc(totlen);
char *p = buf;
for (j=0; j<E.numrows; j++) {
memcpy(p, E.row[j].chars, E.row[j].size);
p += E.row[j].size;
*p = '\n';
p++;
}
return buf;
}
int editorRowCxToRx(erow *row, int cx) {
int rx = 0;
int j;
for (j=0; j<cx; j++) {
if (row->chars[j] == '\t') {
rx += (FN_TAB_STOP - 1) - (rx % FN_TAB_STOP);
}
rx++;
}
return rx;
}
int editorRowRxToCx(erow *row, int rx) {
int cur_rx = 0;
int cx;
for (cx=0; cx < row->size; cx++) {
if (row->chars[cx] == '\t')
cur_rx += (FN_TAB_STOP - 1) - (cur_rx % FN_TAB_STOP);
cur_rx++;
if (cur_rx > rx) return cx;
}
return cx;
}
void editorUpdateRow(erow *row) {
int tabs = 0;
int j;
for (j=0; j<row->size; j++) {
if (row->chars[j] == '\t') tabs++;
}
free(row->render);
row->render = malloc(row->size + tabs*(FN_TAB_STOP - 1) + 1);
int idx = 0;
for (j=0; j<row->size; j++) {
if (row->chars[j] == '\t') {
row->render[idx++] = ' ';
while (idx % FN_TAB_STOP != 0) row->render[idx++] = ' ';
} else {
row->render[idx++] = row->chars[j];
}
}
row->render[idx] = '\0';
row->rsize = idx;
editorUpdateSyntax(row);
}
void editorInsertRow(int at, char *s, size_t len) {
if (at < 0 || at > E.numrows) return;
E.row = realloc(E.row, sizeof(erow) * (E.numrows +1));
memmove(&E.row[at + 1], &E.row[at], sizeof(erow) * (E.numrows - at));
for (int j=at+1; j<= E.numrows; j++) E.row[j].idx++;
E.row[at].idx = at;
E.row[at].size = len;
E.row[at].chars = malloc(len + 1);
memcpy(E.row[at].chars, s, len);
E.row[at].chars[len] = '\0';
E.row[at].rsize = 0;
E.row[at].render = NULL;
E.row[at].hl = NULL;
E.row[at].hl_open_comment = 0;
editorUpdateRow(&E.row[at]);
E.numrows++;
E.dirty++;
}
void editorFreeRow(erow *row) {
free(row->render);
free(row->chars);
free(row->hl);
}
void editorDelRow(int at) {
if (at < 0 || at >= E.numrows) return;
editorFreeRow(&E.row[at]);
memmove(&E.row[at], &E.row[at + 1], sizeof(erow) * (E.numrows - at -1));
for (int j=at; j<= E.numrows-1; j++) E.row[j].idx--;
E.numrows--;
E.dirty++;
}
void editorRowInsertChar(erow *row, int at, int c) {
if (at < 0 || at > row->size) at = row->size;
row->chars = realloc(row->chars, row->size + 2);
memmove(&row->chars[at + 1], &row->chars[at], row->size - at + 1);
row->size++;
row->chars[at] = c;
editorUpdateRow(row);
E.dirty++;
}
void editorRowAppendString(erow *row, char *s, size_t len) {
row->chars = realloc(row->chars, row->size + len + 1);
memcpy(&row->chars[row->size], s, len);
row->size += len;
row->chars[row->size] = '\0';
editorUpdateRow(row);
E.dirty++;
}
void editorRowDelChar(erow *row, int at) {
if (at < 0 || at >= row->size) return;
memmove(&row->chars[at], &row->chars[at + 1], row->size - at);
row->size--;
editorUpdateRow(row);
E.dirty++;
}

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#ifndef _ROW_H
#define _ROW_H
#define ABUF_INIT {NULL, 0}
void abAppend(struct abuf *ab, const char *s, int len);
void abFree(struct abuf *ab);
char *editorRowsToString(int *buflen);
int editorRowCxToRx(erow *row, int cx);
int editorRowRxToCx(erow *row, int rx);
void editorUpdateRow(erow *row);
void editorInsertRow(int at, char *s, size_t len);
void editorFreeRow(erow *row);
void editorDelRow(int at);
void editorRowInsertChar(erow *row, int at, int c);
void editorRowAppendString(erow *row, char *s, size_t len);
void editorRowDelChar(erow *row, int at);
#endif

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#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <signal.h>
#include "fn.h"
#include "search.h"
#include "row.h"
void editorFindCallback(char *query, int key) {
static int last_match = -1;
static int direction = 1;
static int saved_hl_line;
static char *saved_hl = NULL;
if (saved_hl) {
memcpy(E.row[saved_hl_line].hl, saved_hl, E.row[saved_hl_line].rsize);
free(saved_hl);
saved_hl = NULL;
}
if (key == '\r' || key == '\xb') {
last_match = -1;
direction = 1;
return;
} else if (key == ARROW_RIGHT || key == ARROW_DOWN) {
direction = 1;
} else if (key == ARROW_LEFT || key == ARROW_UP) {
direction = -1;
} else {
last_match = -1;
direction = 1;
}
if (last_match == -1) direction = 1;
int current = last_match;
int i;
for (i=0; i < E.numrows; i++) {
current += direction;
if (current == -1) current = E.numrows -1;
else if (current == E.numrows) current = 0;
erow *row = &E.row[current];
char *match = strstr(row->render, query);
if (match) {
last_match = current;
E.cy = current;
E.cx = editorRowRxToCx(row, match - row->render); // Substract pointers here
E.rowoff = E.numrows;
saved_hl_line = current;
saved_hl = malloc(row->rsize);
memcpy(saved_hl, row->hl, row->rsize);
memset(&row->hl[match - row->render], HL_MATCH, strlen(query));
break;
}
}
}
void editorFind() {
int saved_cx = E.cx;
int saved_cy = E.cy;
int saved_coloff = E.coloff;
int saved_rowoff = E.rowoff;
char *query = editorPrompt("Search: %s (Use ESC/Arrows/Enter)", editorFindCallback);
if (query) {
free(query);
} else {
E.cx = saved_cx;
E.cy = saved_cy;
E.coloff = saved_coloff;
E.rowoff = saved_rowoff;
}
}

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#ifndef _SEARCH_H_
#define _SEARCH_H_
void editorFindCallback(char *query, int key);
void editorFind();
#endif