Arthur Barraux
93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
#include "../include/file_io.h"
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#include "../include/input.h"
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#include "../include/output.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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extern char *strdup(const char *);
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extern ssize_t getline(char **restrict lineptr, size_t *restrict n,
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FILE *restrict stream);
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extern int ftruncate(int fd, off_t length);
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extern struct editorConfig E;
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char *editorRowsToString(int *buffer_len) {
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int tot_len = 0;
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int j;
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char *buf;
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char *p;
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for (j = 0; j < E.numrows; ++j) {
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tot_len += E.row[j].size + 1;
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}
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*buffer_len = tot_len;
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buf = malloc(tot_len);
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p = buf;
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for (j = 0; j < E.numrows; ++j) {
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memcpy(p, E.row[j].chars, E.row[j].size);
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p += E.row[j].size;
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*p = '\n';
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p++;
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}
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return buf;
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}
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void editorOpen(char *filename) {
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FILE *fp;
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free(E.filename);
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E.filename = strdup(filename);
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fp = fopen(filename, "r");
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if (!fp)
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die("fopen");
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char *line = NULL;
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size_t line_cap = 0;
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ssize_t line_len;
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while ((line_len = getline(&line, &line_cap, fp)) != -1) {
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while (line_len > 0 &&
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(line[line_len - 1] == '\n' || line[line_len - 1] == '\r')) {
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--line_len;
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}
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editorInsertRow(E.numrows, line, line_len);
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}
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free(line);
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fclose(fp);
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E.dirty = 0;
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}
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void editorSave() {
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int len;
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char *buf;
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int fd;
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if (E.filename == NULL) {
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E.filename = editorPrompt("Save as: %s (ESC to cancel)");
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if (E.filename == NULL) {
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editorSetStatusMessage("Save aborted");
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return;
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}
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}
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buf = editorRowsToString(&len);
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fd = open(E.filename, O_RDWR | O_CREAT, 0644);
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if (fd != -1) {
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if (ftruncate(fd, len) != -1) {
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if (write(fd, buf, len) == len) {
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close(fd);
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free(buf);
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E.dirty = 0;
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editorSetStatusMessage("%d bytes written to disk", len);
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return;
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}
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}
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close(fd);
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}
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free(buf);
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editorSetStatusMessage("Can't save! I/O error: %s", strerror(errno));
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}
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