organize the code better.

1 files changed, 125 insertions, 0 deletions

diff --git a/util.c b/util.c
new file mode 100644
index 0000000..89d47ad
--- /dev/null
+++ b/util.c
@@ -0,0 +1,125 @@
+#include <u.h>
+#include <libc.h>
+#include <thread.h>
+#include <draw.h>
+#include <memdraw.h>
+#include <mouse.h>
+#include <keyboard.h>
+#include <geometry.h>
+#include "libobj/obj.h"
+#include "dat.h"
+#include "fns.h"
+
+int
+min(int a, int b)
+{
+	return a < b? a: b;
+}
+
+int
+max(int a, int b)
+{
+	return a > b? a: b;
+}
+
+double
+fmin(double a, double b)
+{
+	return a < b? a: b;
+}
+
+double
+fmax(double a, double b)
+{
+	return a > b? a: b;
+}
+
+void
+swap(int *a, int *b)
+{
+	int t;
+
+	t = *a;
+	*a = *b;
+	*b = t;
+}
+
+void
+swappt2(Point2 *a, Point2 *b)
+{
+	Point2 t;
+
+	t = *a;
+	*a = *b;
+	*b = t;
+}
+
+void
+swappt3(Point3 *a, Point3 *b)
+{
+	Point3 t;
+
+	t = *a;
+	*a = *b;
+	*b = t;
+}
+
+void
+memsetd(double *p, double v, usize len)
+{
+	double *dp;
+
+	for(dp = p; dp < p+len; dp++)
+		*dp = v;
+}
+
+static void
+decproc(void *arg)
+{
+	int fd, *pfd;
+
+	pfd = arg;
+	fd = pfd[2];
+
+	close(pfd[0]);
+	dup(fd, 0);
+	close(fd);
+	dup(pfd[1], 1);
+	close(pfd[1]);
+
+	execl("/bin/tga", "tga", "-9t", nil);
+	threadexitsall("execl: %r");
+}
+
+Memimage *
+readtga(char *path)
+{
+	Memimage *i;
+	int fd, pfd[3];
+
+	if(pipe(pfd) < 0)
+		sysfatal("pipe: %r");
+	fd = open(path, OREAD);
+	if(fd < 0)
+		sysfatal("open: %r");
+	pfd[2] = fd;
+	procrfork(decproc, pfd, mainstacksize, RFFDG|RFNAMEG|RFNOTEG);
+	close(pfd[1]);
+	i = readmemimage(pfd[0]);
+	close(pfd[0]);
+	close(fd);
+
+	return i;
+}
+
+Memimage *
+rgb(ulong c)
+{
+	Memimage *i;
+
+	i = eallocmemimage(Rect(0,0,1,1), screen->chan);
+	i->flags |= Frepl;
+	i->clipr = Rect(-1e6, -1e6, 1e6, 1e6);
+	memfillcolor(i, c);
+	return i;
+}