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#include "file.h"
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "error.h"
#include "row.h"
#include "syntax.h"
char* editor_rows_to_string(struct editor_state* editor, int* buffer_length)
{
int total_length = 0;
int j;
for (j = 0; j < editor->row_count; j++)
total_length += editor->rows[j].size + 1;
*buffer_length = total_length;
char* buffer = malloc(total_length);
char* p = buffer;
for (j = 0; j < editor->row_count; j++) {
memcpy(p, editor->rows[j].chars, editor->rows[j].size);
p += editor->rows[j].size;
*p = '\n';
p++;
}
return buffer;
}
void editor_open(struct editor_state* editor, char* filename)
{
free(editor->filename);
editor->filename = strdup(filename);
editor_select_syntax_highlight(editor);
FILE* fp = fopen(filename, "r");
if (!fp)
fatal_error("fopen");
char* line = NULL;
size_t line_capacity = 0;
ssize_t line_length;
while ((line_length = getline(&line, &line_capacity, fp)) != -1) {
while (line_length > 0 && (line[line_length - 1] == '\n' || line[line_length - 1] == '\r'))
line_length--;
insert_row(editor, editor->row_count, line, line_length);
}
free(line);
fclose(fp);
editor->dirty = 0;
}
void editor_save(struct editor_state* editor)
{
if (editor->filename == NULL) {
editor->filename = editor_prompt(editor, "Save as: %s", NULL);
if (editor->filename == NULL)
return;
editor_select_syntax_highlight(editor);
}
int length;
char* buffer = editor_rows_to_string(editor, &length);
int fd = open(editor->filename, O_RDWR | O_CREAT, 0644);
if (fd != -1) {
if (ftruncate(fd, length) != -1) {
if (write(fd, buffer, length) == length) {
close(fd);
free(buffer);
editor_set_status_message(editor, "%d bytes written to disk", length);
editor->dirty = 0;
return;
}
}
close(fd);
}
free(buffer);
editor_set_status_message(editor, "Failed to write to disk: %s", strerror(errno));
}
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