fuNote/file.c

74 lines
1.9 KiB
C
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#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#define _GNU_SOURCE
#include <errno.h> // for errno
#include <fcntl.h> // for open, O_CREAT, O_RDWR
#include <stdio.h> // for NULL, fclose, fopen, FILE
#include <stdlib.h> // for free
#include <string.h> // for strdup, strerror
#include <unistd.h> // for close, ftruncate, ssize_t
#include <termios.h> // for termios
#include "file.h"
#include "fn.h" // for editorSetStatusMessage, E, editorConfig, edito...
#include "hl.h" // for editorSelectSyntaxHighlight
#include "row.h" // for editorRowsToString
#include "terminal.h" // for die
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));
}