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mirror of git://projects.qi-hardware.com/fped.git synced 2024-11-04 23:55:54 +02:00
fped/file.c
werner 8cd9b7b514 Added a "Save as" dialog and made fped disable "Save" if working on a manually
created file. This is a precaution against accidently saving to a manual work,
which would change the structure and remove all comments.

- fped.h, fped.c, file.c: moved declaration of save_file_name into shared 
  header
- dump.h, dump.c (MACHINE_GENERATED): moved header marking machine-generated
  files into shared macro
- gui.c (save_as_fpd): added "Save as" dialog
- fped.h, fped.c (load_file), gui.c: disable "Save" if editing a file that 
  doesn't have the machine-generated header



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5922 99fdad57-331a-0410-800a-d7fa5415bdb3
2010-04-20 01:11:45 +00:00

197 lines
3.1 KiB
C

/*
* file.c - File handling
*
* Written 2009, 2010 by Werner Almesberger
* Copyright 2009, 2010 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include "dump.h"
#include "kicad.h"
#include "postscript.h"
#include "util.h"
#include "file.h"
#include "fped.h"
/* ----- general helper functions ------------------------------------------ */
char *set_extension(const char *name, const char *ext)
{
char *s = stralloc(name);
char *slash, *dot;
char *res;
slash = strrchr(s, '/');
dot = strrchr(slash ? slash : s, '.');
if (dot)
*dot = 0;
res = stralloc_printf("%s.%s", s, ext);
free(s);
return res;
}
int file_exists(const char *name)
{
struct stat st;
if (stat(name, &st) >= 0)
return 1;
if (errno == ENOENT)
return 0;
perror(name);
return -1;
}
int save_to(const char *name, int (*fn)(FILE *file))
{
FILE *file;
file = fopen(name, "w");
if (!file) {
perror(name);
return 0;
}
if (!fn(file)) {
perror(name);
return 0;
}
if (fclose(file) == EOF) {
perror(name);
return 0;
}
return 1;
}
void save_with_backup(const char *name, int (*fn)(FILE *file))
{
char *s = stralloc(name);
char *back, *tmp;
char *slash, *dot;
int n, res;
/* save to temporary file */
slash = strrchr(s, '/');
if (!slash)
tmp = stralloc_printf("~%s", s);
else {
*slash = 0;
tmp = stralloc_printf("%s/~%s", s, slash+1);
*slash = '/';
}
if (!save_to(tmp, fn))
return;
/* move existing file out of harm's way */
dot = strrchr(slash ? slash : s, '.');
if (dot)
*dot = 0;
n = 0;
while (1) {
back = stralloc_printf("%s~%d%s%s",
s, n, dot ? "." : "", dot ? dot+1 : "");
res = file_exists(back);
if (!res)
break;
free(back);
if (res < 0)
return;
n++;
}
if (rename(name, back) < 0) {
if (errno != ENOENT) {
perror(name);
free(back);
return;
}
} else {
fprintf(stderr, "renamed %s to %s\n", name, back);
}
free(back);
/* rename to final name */
if (rename(tmp, name) < 0) {
perror(name);
free(tmp);
return;
}
free(tmp);
fprintf(stderr, "saved to %s\n", name);
}
/* ----- application-specific save handlers -------------------------------- */
void save_fpd(void)
{
if (save_file_name)
save_with_backup(save_file_name, dump);
else {
if (!dump(stdout))
perror("stdout");
}
}
void write_kicad(void)
{
char *name;
if (save_file_name) {
name = set_extension(save_file_name, "mod");
save_to(name, kicad);
free(name);
} else {
if (!kicad(stdout))
perror("stdout");
}
}
static void do_write_ps(int (*fn)(FILE *file))
{
char *name;
if (save_file_name) {
name = set_extension(save_file_name, "ps");
save_to(name, fn);
free(name);
} else {
if (!fn(stdout))
perror("stdout");
}
}
void write_ps(void)
{
do_write_ps(postscript);
}
void write_ps_fullpage(void)
{
do_write_ps(postscript_fullpage);
}