mirror of
git://projects.qi-hardware.com/cae-tools.git
synced 2024-12-23 03:36:27 +02:00
95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/*
|
|
* gerber.c - Gerber file input
|
|
*
|
|
* Written 2010 by Werner Almesberger
|
|
* Copyright 2010 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.
|
|
*/
|
|
|
|
/*
|
|
* Note: this is limited to the Gerber produced by KiCad for the PCB Edge
|
|
* layer. Furthermore, we ignore the tool diameter for now.
|
|
*
|
|
* The relevant details are nicely explained at
|
|
* http://www.pcbmilling.com/Examples of Gerber and Excellon Data Files.htm
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "path.h"
|
|
#include "gerber.h"
|
|
|
|
|
|
/* KiCad Gerber uses 0.1 mil units */
|
|
|
|
#define KU2MM(in) ((in)/10000.0*25.4)
|
|
|
|
|
|
struct path *gerber_read(const char *name, double r_tool_default)
|
|
{
|
|
FILE *file;
|
|
int lineno = 0;
|
|
char buf[1024];
|
|
struct path *paths = NULL, **anchor = &paths, *path = NULL;
|
|
double start_x = 0, start_y = 0;
|
|
int xi, yi, d;
|
|
double x, y;
|
|
|
|
file = name ? fopen(name, "r") : stdin;
|
|
if (!file) {
|
|
perror(name);
|
|
exit(1);
|
|
}
|
|
|
|
while (fgets(buf, sizeof(buf), file)) {
|
|
lineno++;
|
|
if (!strncmp(buf, "%FS", 3)) {
|
|
if (strcmp(buf, "%FSLAX34Y34*%\n")) {
|
|
fprintf(stderr,
|
|
"unrecognized format %s\n", buf);
|
|
exit(1);
|
|
}
|
|
continue;
|
|
}
|
|
if (!strncmp(buf, "%MO", 3)) {
|
|
if (strcmp(buf, "%MOIN*%\n")) {
|
|
fprintf(stderr,
|
|
"unrecognized mode %s\n", buf);
|
|
exit(1);
|
|
}
|
|
continue;
|
|
}
|
|
if (sscanf(buf, "X%dY%dD%d*\n", &xi, &yi, &d) != 3)
|
|
continue;
|
|
x = KU2MM(xi);
|
|
y = KU2MM(yi);
|
|
switch (d) {
|
|
case 1:
|
|
if (!path) {
|
|
path = path_new(r_tool_default, name);
|
|
*anchor = path;
|
|
anchor = &path->next;
|
|
path_add(path, start_x, start_y, 0);
|
|
}
|
|
path_add(path, x, y, 0);
|
|
break;
|
|
case 2:
|
|
path = NULL;
|
|
start_x = x;
|
|
start_y = y;
|
|
break;
|
|
default:
|
|
fprintf(stderr, "don't recognize D%d\n", d);
|
|
exit(1);
|
|
}
|
|
}
|
|
fclose(file);
|
|
return path_connect(paths);
|
|
}
|